Refrigerated van rear door frame structure with profiled thermal barrier

Abstract

The application relates to a refrigerated compartment rear door frame structure with a special-shaped heat insulation strip and relates to the related technical field of refrigerated transportation auxiliary structures. The refrigerated compartment rear door frame structure comprises a compartment body, a door frame, a compartment door body and a sealing piece; the sealing piece comprises a U-shaped connecting piece, a sealing strip, an adjusting assembly and a baffle. The U-shaped connecting piece of the refrigerated compartment rear door frame structure with the special-shaped heat insulation strip connects the sealing strip with the compartment door body, so that the sealing strip can move along with the closing of the compartment door body; the sealing strip is extruded to generate axial deformation through the elasticity of the sealing strip and the support of the adjusting assembly, gaps are filled, and a sealing effect is achieved; the baffle extrudes the outer side of the sealing strip when the sealing strip is closed, and the sealing effect is further improved.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary structures for refrigerated transport, and in particular to a rear door frame structure of a refrigerated compartment with irregularly shaped heat insulation strips. Background Technology

[0002] Currently, refrigerated transport vehicles and cold storage facilities require extremely high sealing performance for their doors. Traditional refrigerated compartment door seals typically use a single rubber strip, achieving a seal through compression when the door is closed. However, with prolonged use, especially in extremely low-temperature environments, the rubber material hardens and loses elasticity, leading to a poor seal. This leakage of cold air not only causes temperature fluctuations inside the compartment, affecting the quality of goods, but also forces the refrigeration unit to operate at a continuously high load, resulting in significant energy waste.

[0003] Furthermore, existing sealing strips have a simple structure, and their deformation direction under pressure is uncontrollable, making it difficult to evenly fill all gaps and resulting in limited sealing performance. Once the sealing strip ages or is damaged, replacement is often very troublesome, requiring professional operation, and may even necessitate replacing the entire sealing assembly, leading to high maintenance costs. Utility Model Content

[0004] To address the limitations of current refrigerated truck rear door frame structures with irregularly shaped insulation strips, which suffer from simple sealing strip structures, uncontrollable deformation under pressure, difficulty in evenly filling all gaps, and limited sealing performance, and the high maintenance costs associated with replacement of aged or damaged sealing strips, this invention provides a refrigerated truck rear door frame structure with irregularly shaped insulation strips.

[0005] The technical solution provided in this application for a refrigerated compartment rear door frame structure with irregularly shaped heat insulation strips is as follows: including a compartment body, a door frame fixedly connected to the compartment body, a compartment door body hinged to the door frame, and sealing elements respectively provided on the upper and lower end faces of the compartment door body; The sealing element includes a "U"-shaped connector connected to the door body, a sealing strip disposed at the end of the connector away from the door body, an adjustment component disposed in the inner cavity of the connector, and a baffle fixedly connected to the door body. By adopting the above technical solution, the compartment body serves as the main structure, providing storage space; the door frame is fixedly connected to the compartment body, providing a framework for installing and positioning the door; the door body, hinged to the door frame, can achieve structural transformation during opening and closing, providing an access passage. The function of the sealing element is to ensure that the gap between the door body and the door frame is effectively sealed when the door body is closed, preventing external rainwater or dust from entering. Specifically, the "U"-shaped connector connects the sealing strip to the door body, allowing the sealing strip to move as the door body closes; the sealing strip, through its own elasticity and the support and compression of the adjusting components, generates axial deformation, filling the gap and achieving a sealing effect; the baffle further compresses the outer side of the sealing strip when it is closed, further improving the sealing effect.

[0006] As a preferred embodiment, the sealing strip and the connecting member are detachably connected; a limiting protrusion is provided at one end of the sealing strip near the connecting member, and a limiting groove adapted to the limiting protrusion is provided on the connecting member.

[0007] By adopting the above technical solution, the limiting protrusion is located at the end of the sealing strip near the connector, which can prevent the sealing strip from falling off due to excessive stretching caused by external force. The corresponding limiting groove on the connector matches the limiting protrusion, which can effectively fix the sealing strip, ensure the stability of the sealing strip, and prevent displacement or falling off during use.

[0008] As a preferred embodiment, the sealing strip has a circular cross-section and is made of a low-temperature resistant elastic rubber material.

[0009] By adopting the above technical solution, the sealing strip has a circular cross-section, indicating that its cross-section is annular. This design ensures that the sealing strip maintains a uniform fit when installed at openings such as doors and windows, preventing the penetration of air and moisture, thereby improving the sealing effect. The sealing strip is made of low-temperature resistant elastic rubber material, which ensures that it maintains good elasticity and toughness in low-temperature environments, effectively resisting material shrinkage and deformation caused by low temperatures, and ensuring its long-term stable sealing performance.

[0010] As a preferred embodiment, the opening of the "U"-shaped connector is positioned opposite to the door body, and the connector is made of shape memory alloy material.

[0011] By adopting the above technical solution, during the installation process, the position of the "U"-shaped connector is adjusted and fixed according to the design requirements. The shape memory alloy material allows the connector to deform when subjected to a certain external force. When the external force disappears or the environmental conditions change, the shape memory alloy material will automatically return to its initial shape, maintaining the tightness of the connection. At the same time, the characteristics of this material help to improve the flexibility and adaptability of the connector, ensuring that the door can be opened and closed smoothly without being damaged.

[0012] As a preferred embodiment, the adjustment assembly includes a first abutting block fixedly disposed on one side of the inner cavity of the connector and a second abutting block fixedly disposed on the other side of the inner cavity of the connector. The opposing surfaces of the first abutting block and the second abutting block are slidably connected by a wedge structure, and the lengths of the first abutting block and the second abutting block are equal to the length of the connector.

[0013] By adopting the above technical solution, the first and second clamping blocks are fixedly disposed on both sides of the inner cavity of the connector. These components slide relative to each other through a wedge-shaped structure, thereby allowing for flexible adjustment of their relative positions. Specifically, the first clamping block provides a clamping force, while the second clamping block adjusts its relative position by sliding relative to the wedge-shaped structure of the first clamping block, thus adapting to different assembly requirements. Since the lengths of the first and second clamping blocks match the total length of the connector, the stability of the entire connection structure is ensured during adjustment.

[0014] As a preferred embodiment, the connector further includes a plurality of tension springs evenly disposed within the inner cavity of the connector, wherein the two ends of the tension springs are respectively fixedly connected to the inner wall of the connector. The outer diameter of the plurality of tension springs decreases sequentially from the end closest to the door to the end furthest from the door.

[0015] By adopting the above technical solution, tension springs are evenly distributed within the inner cavity of the connector, with both ends fixedly connected to the inner wall of the connector, thus providing support and cushioning. The outer diameter of the tension spring decreases progressively from the end closest to the door to the end furthest from the door, allowing the tension spring to better adapt to displacement requirements at different positions during extension and contraction. When the door opens or closes, the tension spring generates a corresponding rebound force, effectively counteracting the influence of external forces and reducing door swaying and abnormal noise.

[0016] As a preferred embodiment, the baffle has an "L" shaped cross-section, with one right-angled side fixedly connected to the body and the other right-angled side serving as the extrusion surface in contact with the sealing strip.

[0017] By adopting the above technical solution, the cross-sectional design of the "L"-shaped baffle gives it a dual function: one side is fixedly connected to the compartment body to ensure stable installation of the baffle and provide structural support; the other side serves as a compression surface that contacts the sealing strip, effectively enhancing the sealing performance of the compartment door and preventing external environment from interfering with the sealing performance of the compartment.

[0018] As a preferred embodiment, the connector also includes fixing holes evenly distributed on one side of the connector relative to the door body, wherein fixing screws are provided in the fixing holes and are fixedly connected to the door body through the fixing holes.

[0019] By adopting the above technical solution, once the fixing screw passes through the fixing hole and is fixedly connected to the door body, it can not only effectively combine the connector with the door body, but also ensure that the force transmission between the two is more balanced, thus improving the reliability of the overall structure.

[0020] In summary, this application includes the following beneficial technical effects: 1. Through a unique "bidirectional extrusion" mechanism (external baffle extrusion, internal adjustment component support), the circular sealing strip is forced to produce controllable and sufficient axial deformation, which can perfectly fill various gaps between the door body and the door frame, greatly improving the sealing level and effectively blocking cold air leakage. 2. The sealing strip is made of specially formulated low-temperature resistant rubber, which maintains excellent elasticity even in ultra-low temperature environments, avoiding sealing failure caused by material hardening. The connectors are made of shape memory alloy, ensuring automatic return to their original position after deformation and extending service life. 3. The first and second wedge-shaped clamping blocks in the adjusting assembly provide guidance and stable internal support under pressure, ensuring uniform and sufficient deformation of the sealing strip and avoiding localized sealing defects. The built-in gradient tension spring assembly further assists in the deformation and reset of the connecting parts, enhancing the reliability and durability of the entire system. 4. Easy to maintain and replace: The sealing strip and connector adopt a slot-type detachable connection design. When the sealing strip is worn or aged, it can be easily replaced without disassembling the entire door or large parts, which greatly reduces the maintenance cost and time in the later stage. 5. Energy saving and consumption reduction: It fundamentally solves the problem of cold air leakage, improves the working efficiency of the refrigeration unit, significantly reduces the operating energy consumption of the equipment, and meets the requirements of green environmental protection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the rear door frame of a refrigerated compartment with a special-shaped heat insulation strip, as described in this application. Figure 2 This is a schematic diagram of the sealing element in the rear door frame structure of a refrigerated compartment with a special-shaped heat insulation strip, as described in this application. Figure 3 This application relates to a refrigerated compartment rear door frame structure with a special-shaped heat insulation strip. Figure 2 A structural schematic diagram of the front view; Figure 4 This is a structural schematic diagram of the sealing strip and connector in the rear door frame structure of a refrigerated compartment with a special-shaped heat insulation strip, as described in this application. Figure 5 This is a schematic diagram of the air defense door closing seal in the sealed state of a refrigerated compartment rear door frame structure with a special-shaped heat insulation strip according to this application; Figure 6This is a schematic diagram of the structure of the air-raid shelter door opening seal in the unsealed state of the rear door frame structure of a refrigerated compartment with a special-shaped heat insulation strip, as described in this application. Explanation of reference numerals in the attached drawings: 100, body; 200, door frame; 201, door body; 3, sealing element; 31, connecting element; 311, limiting groove; 312, fixing hole; 32, sealing strip; 321, limiting protrusion; 4, baffle; 51, first abutting block; 52, second abutting block; 6, tension spring. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the accompanying drawings.

[0023] Please refer to the details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application discloses a refrigerated compartment rear door frame structure with an irregularly shaped heat insulation strip. It includes a compartment body 100, a door frame 200 fixedly connected to the compartment body 100, a compartment door 201 hinged to the door frame 200, and sealing members 3 respectively provided on the upper and lower end faces of the compartment door 201; Please refer to the details. Figure 2 and Figure 3 The sealing element 3 includes a "U"-shaped connector 31 connected to the door body 201, a sealing strip 32 disposed at the end of the connector 31 away from the door body 201, an adjustment component disposed in the inner cavity of the connector 31, and a baffle 4 fixedly connected to the body 100. When the door 201 is closed, the outer side of the sealing strip 32 is compressed by the baffle 4, and the inner side of the sealing strip 32 is supported and compressed by the adjusting component, causing the sealing strip 32 to undergo axial deformation and fill the gap between the door 201 and the door frame 200. The compartment 100 provides storage space as the main structure; the door frame 200 is fixedly connected to the compartment 100, providing a frame for installing and positioning the door 201; the door 201, through hinge with the door frame 200, can achieve structural transformation during opening and closing, providing an access passage. The function of the sealing element 3 is to ensure that the gap between the door 201 and the door frame 200 is effectively sealed when the door 201 is closed, preventing external rainwater or dust from entering. Specifically, the "U"-shaped connector 31 connects the sealing strip 32 to the door body 201, allowing the sealing strip 32 to move as the door body 201 closes. The sealing strip 32, through its own elasticity and the support and compression of the adjusting component, undergoes axial deformation to fill the gap and achieve a sealing effect. The baffle 4 further enhances the sealing effect by pressing against the outer side of the sealing strip 32 when it is closed. The overall working principle is as follows: when the door body 201 is closed, the gap between the door body 201 and the door frame 200 is compressed, causing the sealing strip 32 to undergo axial deformation. It relies on its own elasticity and the combined action of the baffle 4 and the adjusting component to tightly fit the gap, achieving a good sealing effect.

[0024] Please refer to the details. Figure 3 The sealing strip 32 and the connecting member 31 are detachably connected. A limiting protrusion 321 is provided at the end of the sealing strip 32 near the connecting member 31, and a limiting groove 311 adapted to the limiting protrusion 321 is provided on the connecting member 31. The limiting protrusion 321, located at the end of the sealing strip 32 near the connecting member 31, prevents the sealing strip 32 from falling off due to excessive stretching caused by external force. The corresponding limiting groove 311 on the connecting member 31 matches the limiting protrusion 321, effectively fixing the sealing strip 32 and ensuring its stable position, preventing displacement or detachment during use. In terms of working principle, when the sealing strip 32 and the connecting member 31 are assembled, the limiting protrusion 321 of the sealing strip 32 inserts into the limiting groove 311 of the connecting member 31. This limiting design not only ensures the correct position of the sealing strip 32 but also facilitates quick installation and disassembly, allowing the equipment to adapt to different operating environments and simplifying maintenance and replacement of the sealing strip 32.

[0025] Please refer to the details. Figure 2 and Figure 3The sealing strip 32 has a circular cross-section and is made of low-temperature resistant elastic rubber material. The circular cross-section of the sealing strip 32 indicates its annular shape, a design that ensures it maintains a uniform fit when installed at openings such as doors and windows, preventing air and moisture penetration and thus improving the sealing effect. Made of low-temperature resistant elastic rubber material, the sealing strip 32 maintains good elasticity and toughness even in low-temperature environments, effectively resisting material shrinkage and deformation caused by low temperatures and ensuring its long-lasting and stable sealing performance.

[0026] Please refer to the details. Figure 1 , Figure 4 and Figure 5 The opening of the "U"-shaped connector 31 faces away from the door body 201, and the connector 31 is made of shape memory alloy. During installation, the position of the "U"-shaped connector 31 is adjusted and fixed according to design requirements. The shape memory alloy material allows the connector 31 to deform under certain external forces. When the external force disappears or environmental conditions change, such as a rise in temperature, the shape memory alloy material will automatically return to its initial shape, maintaining the tightness of the connection. At the same time, this material characteristic helps to improve the flexibility and adaptability of the connector 31, ensuring that the door body 201 can open and close smoothly without being damaged.

[0027] Please refer to the details. Figure 2 and Figure 3 The adjustment assembly includes a first abutment block 51 fixedly disposed on one side of the inner cavity of the connector 31 and a second abutment block 52 fixedly disposed on the other side of the inner cavity of the connector 31. The opposing surfaces of the first abutment block 51 and the second abutment block 52 are slidably connected by a wedge-shaped structure. The lengths of the first abutment block 51 and the second abutment block 52 are equal to the length of the connector 31. The first abutment block 51 and the second abutment block 52 are respectively fixedly disposed on both sides of the inner cavity of the connector 31. These components slide relative to each other through the wedge-shaped structure, thereby allowing for flexible adjustment of their relative positions. Specifically, the first abutment block 51 provides a pressing force, while the second abutment block 52 adjusts its relative position by sliding relative to the wedge-shaped structure of the first abutment block 51, thus adapting to different assembly requirements. Since the lengths of the first abutment block 51 and the second abutment block 52 match the total length of the connector 31, the stability of the entire connection structure can be ensured during adjustment.

[0028] Please refer to the details. Figure 2 and Figure 3 It also includes a plurality of tension springs 6 evenly arranged in the inner cavity of the connector 31, with the two ends of the tension springs 6 being fixedly connected to the inner wall of the connector 31 respectively.

[0029] Please refer to the details. Figure 3Multiple tension springs 6 have outer diameters that decrease sequentially from the end closest to the door 201 to the end furthest from the door 201. The tension springs 6 are evenly distributed within the inner cavity of the connector 31, with both ends fixedly connected to the inner wall of the connector 31, providing support and cushioning. The sequential decrease in outer diameter from the end closest to the door 201 to the end furthest from the door 201 allows the tension springs 6 to better adapt to displacement requirements at different positions during extension and retraction. When the door 201 opens or closes, the tension springs 6 generate a corresponding rebound force, effectively counteracting the influence of external forces and reducing the shaking and abnormal noise of the door 201. Overall, these tension springs 6 and the connector 31 work together to not only enhance the stability and sealing of the door 201 but also improve the durability and comfort of the entire structure, thereby ensuring the safety and reliability of the equipment or vehicle during operation.

[0030] Please refer to details. Figure 1 , Figure 4 and Figure 5 The baffle 4 has an "L"-shaped cross-section, with one right-angled side fixedly connected to the compartment 100 and the other right-angled side acting as a pressing surface in contact with the sealing strip 32. This "L"-shaped baffle 4 design gives it a dual function: one side is fixedly connected to the compartment 100, ensuring stable installation and providing structural support; the other side acts as a pressing surface in contact with the sealing strip 32, effectively enhancing the sealing performance of the compartment door 201 and preventing interference from the external environment on the interior sealing. The working principle is that when the compartment door 201 is closed, the vertical portion of the baffle 4 presses tightly against the sealing strip 32, increasing the contact pressure to improve the sealing effect, thereby effectively preventing outside air, dust, or moisture from entering the compartment 100 and protecting the internal items from contamination or moisture damage.

[0031] Please refer to details. Figure 1 and Figure 2 It also includes fixing holes 312 evenly arranged on one side of the connector 31 relative to the door body 201. Fixing screws are provided in the fixing holes 312. The fixing screws pass through the fixing holes 312 and are fixedly connected to the door body 201. When the fixing screws pass through the fixing holes 312 and are fixedly connected to the door body 201, it can not only effectively combine the connector 31 and the door body 201, but also ensure that the force transmission between the two is more balanced, thus improving the reliability of the overall structure.

[0032] The implementation principle of the refrigerated compartment rear door frame structure with irregular heat insulation strip in this application embodiment is as follows: when the compartment door 201 is closed, the gap between the compartment door 201 and the door frame 200 is squeezed, and the sealing strip 32 undergoes axial deformation. It relies on its own elasticity and the combined action of the baffle 4 and the adjustment component to tightly fit the gap, achieving a good sealing effect.

[0033] The first abutment block 51 and the second abutment block 52 in the adjusting assembly are respectively fixedly disposed on both sides of the inner cavity of the connector 31. These components slide relative to each other through a wedge structure, thereby allowing for flexible adjustment of their relative positions. Specifically, the first abutment block 51 provides a pressing force, while the second abutment block 52 slides relative to the wedge structure of the first abutment block 51, cooperating with it to adjust its relative position. The outer diameter of the tension spring 6 decreases sequentially from the end closer to the door body 201 to the end farther away from the door body 201, allowing the tension spring 6 to better adapt to the displacement requirements of different positions during extension and retraction. When the door body 201 is opened or closed, the tension spring 6 can generate a corresponding rebound force, effectively counteracting the influence of external forces and reducing the shaking and abnormal noise of the door body 201.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A refrigerated compartment rear door frame structure with irregularly shaped heat insulation strips, characterized in that: Includes a compartment (100), a door frame (200) fixedly connected to the compartment (100), a door body (201) hinged to the door frame (200), and sealing elements (3) respectively provided on the upper and lower end faces of the door body (201). The sealing element (3) includes a "U"-shaped connector (31) connected to the door body (201), a sealing strip (32) disposed at the end of the connector (31) away from the door body (201), an adjustment component disposed in the inner cavity of the connector (31), and a baffle (4) fixedly connected to the door body (100).

2. The refrigerated compartment rear door frame structure with irregularly shaped heat insulation strip according to claim 1, characterized in that: The sealing strip (32) and the connector (31) are detachably connected; a limiting protrusion (321) is provided at one end of the sealing strip (32) near the connector (31), and a limiting groove (311) is provided on the connector (31) to match the limiting protrusion (321).

3. The refrigerated compartment rear door frame structure with irregularly shaped heat insulation strip according to claim 2, characterized in that: The sealing strip (32) has a circular cross-section and is made of low-temperature resistant elastic rubber material.

4. The refrigerated compartment rear door frame structure with irregularly shaped heat insulation strip according to claim 3, characterized in that: The opening of the "U"-shaped connector (31) is set away from the door body (201), and the connector (31) is made of shape memory alloy material.

5. The refrigerated compartment rear door frame structure with irregularly shaped heat insulation strip according to claim 4, characterized in that: The adjustment assembly includes a first abutting block (51) fixedly disposed on one side of the inner cavity of the connector (31) and a second abutting block (52) fixedly disposed on the other side of the inner cavity of the connector (31). The opposing surfaces of the first abutting block (51) and the second abutting block (52) are slidably connected by a wedge structure. The lengths of the first abutting block (51) and the second abutting block (52) are equal to the length of the connector (31).

6. The refrigerated compartment rear door frame structure with irregularly shaped heat insulation strip according to claim 5, characterized in that: It also includes a plurality of tension springs (6) evenly arranged in the inner cavity of the connector (31), with the two ends of the tension springs (6) respectively fixedly connected to the inner wall of the connector (31).

7. A refrigerated compartment rear door frame structure with a shaped heat insulation strip according to claim 6, characterized in that: The outer diameter of the plurality of tension springs (6) decreases sequentially from the end closest to the door body (201) to the end furthest from the door body (201).

8. A refrigerated compartment rear door frame structure with a special-shaped heat insulation strip according to claim 7, characterized in that: The cross-section of the baffle (4) is "L" shaped, with one right-angled side fixedly connected to the box body (100), and the other right-angled side serving as the extrusion surface in contact with the sealing strip (32).

9. A refrigerated compartment rear door frame structure with a special-shaped heat insulation strip according to claim 8, characterized in that: In addition, it also includes fixing holes (312) evenly arranged on one side of the connector (31) relative to the door body (201), and fixing screws are provided in the fixing holes (312), and the fixing screws pass through the fixing holes (312) and are fixedly connected to the door body (201).

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