High-strength cold bridge breaking forced sealing frameless box body

Abstract

The utility model discloses a high-strength broken cold bridge forced sealing frameless box body, which is characterized in that a box plate of the box body is integrally formed by foaming after a composite section I, a composite section II, an inner lining plate and an outer lining plate are spliced, two composite sections I are matched and combined to form a right-angle connection of the box body, and two composite sections II are matched and combined to form a plane section connection of the box body. Wherein the first composite section bar is formed by connecting a first aluminum alloy section bar and a first PVC heat insulation section bar in a mortise and tenon mode, the PVC heat insulation section bar is pasted with a high-elasticity sealing strip, and the second composite section bar is formed by connecting a second aluminum alloy section bar and a second PVC heat insulation section bar in a mortise and tenon mode. The utility model not only avoids the phenomena of cold bridge and condensation, but also has the advantages of good heat insulation effect, high structural strength, strong sealing performance, few types of profiles, convenience in design and installation, attractive appearance, capability of meeting the requirement of a clean air conditioner and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of the box body structure of an air handling unit, in particular to a high-strength cold-break forced-sealing frameless box body.

Background Art

[0002] The box bodies of the central air-conditioning terminal product air handling units are mainly divided into two categories in terms of structural forms: frame structures and frameless structures. The currently used thicknesses of the box panels mainly include several specifications such as 25mm, 30mm, and 50mm. The 50mm-thick box panel of the air handling unit has different application scenarios compared with the 25mm- and 30mm-thick box panels, each having its own advantages. The characteristics and application scenarios of the 50mm-thick box panel of the air handling unit are as follows:

[0003] Thermal insulation performance: A thicker thermal insulation layer can provide better heat insulation effect, effectively reducing heat transfer, and is applicable to environments with higher energy-saving requirements or large temperature differences, such as cold or hot regions, cold storage warehouses, etc.

[0004] Sound insulation performance: The increase in thickness also means better sound insulation effect, and is applicable to places with high requirements for noise control, such as hospitals, libraries, high-class hotels, etc.

[0005] Structural strength: Thicker box panels improve the overall structural strength and stability, and can maintain good performance under working conditions of high wind pressure and long-term vibration, and are suitable for large-scale or high-end commercial and industrial applications.

[0006] Applicable scenarios: For places that require strict temperature and humidity control, have high cleanliness requirements or have special environmental control requirements, such as hospital operating rooms, semiconductor dust-free workshops, laboratories, etc.

[0007] The frame structure usually forms a box body frame by connecting border profiles through tees, and then fixes the insulation board on the frame with aluminum alloy pressing strips or screws to form a box body; while the frameless structure usually uses aluminum alloy profiles and PVC heat insulation profiles to be interspersed and matched, integrally foamed after being integrally assembled with the inner and outer lining boards of the box panel, and then bolts or screws are used to connect and assemble the foamed boards to form a box body.

[0008] Because the insulation board and the box body frame of the frame structure are not an integral structure, it is easy to have installation gaps between the insulation board and the frame, resulting in defects such as high air leakage rate, local condensation and dew condensation of the box body, rust of the box body, and energy waste. While the box panel of the frameless structure directly forms a box body by integrally foaming and assembling the box panels, multiple factors such as box panel strength, cold-break performance, and sealing performance need to be considered simultaneously.

[0009] Although most frameless structures have improved in terms of air leakage rate, there are still deficiencies in the strength of the box panels and cold bridge breakage. Additionally, for the current box body structures of most frameless air handling units, designers mostly design with at least three types of aluminum alloy profiles and PVC in combination, resulting in a relatively large number of profile types, which has a significant impact on the design efficiency, production efficiency, etc. of the units.

Utility Model Content

[0010] The utility model provides a high-strength cold bridge-breaking forced-sealing frameless box body, which solves the technical problems such as insufficient strength, cold bridge, poor airtightness, and excessive types of profiles existing in the box bodies of existing air handling units.

[0011] The high-strength cold bridge-breaking forced-sealing frameless box body provided by the utility model has box panels including a No. I composite profile, a No. II composite profile, an inner lining board, and an outer lining board. The No. I composite profile is formed by mortise and tenon connection of a No. I aluminum alloy profile and a No. I PVC heat-insulating profile. The No. II composite profile is formed by mortise and tenon connection of a No. II aluminum alloy profile and a No. II PVC heat-insulating profile. Both the No. I composite profile and the No. II composite profile are designed with a slot structure. The box panels of the box body are integrally foamed after being assembled by the No. I composite profile, the No. II composite profile, the inner lining board, and the outer lining board, and then the integrally foamed box panels are assembled into the box body. The right-angle connection of the box body is formed by combining two No. I composite profiles, and the planar section connection of the box body is formed by combining two No. II composite profiles.

[0012] The left side of the No. I aluminum alloy profile is provided with two-stage rectangular steps, and the upper left corner of the No. I aluminum alloy profile is provided with a convex tooth structure. A clamping groove is formed between the convex tooth structure and the two-stage rectangular steps.

[0013] The left side surface of the No. I PVC heat-insulating profile is provided with an inclined wavy concave-convex structure.

[0014] When the box panels are connected at a right angle, the convex tooth structure of one of the No. I aluminum alloy profiles is inserted into the clamping groove of the other No. I aluminum alloy profile. At the same time, the two-stage rectangular steps of the two No. I aluminum alloy profiles are abutted and supported against each other. Before connection, a high-elastic sealing strip is attached to one of the wavy concave-convex structures. The wavy concave-convex structures of the two No. I PVC heat-insulating profiles approach each other and squeeze and contact the high-elastic sealing strip. When connecting, the two No. I aluminum alloy profiles are also connected by bolts and blind rivet nuts.

[0015] The No. II aluminum alloy profile has multiple mutually perpendicular profile surfaces, and the cross-section is in an "S" shape structure. A flat-through slot is provided in the middle of the right side of the No. II aluminum alloy profile.

[0016] When connecting the box board sections, two No. II composite profiles are symmetrically in contact and butt-jointed. The flat through slots of the two No. II aluminum alloy profiles are just connected. A flat through profile is placed in the connected flat through slots, and then the flat through profile is fixed to the left and right No. II composite profiles with screws.

[0017] Through the above technical solution, the box body box board is mainly composed of two kinds of aluminum alloy profiles, two kinds of PVC heat insulation profiles, and one kind of high-elastic sealing strip. Among them, the No. I aluminum alloy profile and the No. I PVC heat insulation profile are nested together to form a No. I composite profile. The high-elastic sealing strip is pasted on the wave sealing surface of the No. I PVC heat insulation profile. The No. II aluminum alloy profile and the No. II PVC heat insulation profile are nested together to form a No. II composite profile. At the right-angle connection of the box body, both box boards adopt No. I composite profiles. Through the concave-convex surface card slot type surface contact on the profiles, single-point contact is avoided, ensuring sufficient connection contact between the two box boards. And after the two box boards are buckled, the concave-convex surfaces on the profiles form multi-surface support and limit to the connection, greatly improving the connection strength. At the flat connection of the box body, both box boards adopt No. II composite profiles. Through the upper surface and the lower surface of the flat through profile respectively forming two seam connections with the butt joint surface profiles of the box board, the connection strength is ensured. In addition, the structures of the No. I aluminum alloy profile and the No. II aluminum alloy profile are formed by connecting multiple mutually perpendicular surfaces, and the profiles have high strength and are not easy to deform.

[0018] Preferably, a groove locking structure I is provided at the upper right corner of the No. I aluminum alloy profile, and a convex groove locking structure I is provided at the bottom of the No. I PVC heat insulation profile. When the No. I aluminum alloy profile and the No. I PVC heat insulation profile are tenon-mortise connected, the convex groove locking structure I of the No. I PVC heat insulation profile is inserted into the groove locking structure I of the No. I aluminum alloy profile.

[0019] Preferably, a groove locking structure II is provided at the top of the No. II aluminum alloy profile, and a convex groove locking structure II is provided at the bottom of the No. II PVC heat insulation profile. When the No. II aluminum alloy profile and the No. II PVC heat insulation profile are tenon-mortise connected, the convex groove locking structure II of the No. II PVC heat insulation profile is inserted into the groove locking structure II of the No. II aluminum alloy profile.

[0020] Preferably, after the No. I aluminum alloy profile and the No. I PVC heat insulation profile are tenon-mortise connected, and after the No. II aluminum alloy profile and the No. II PVC heat insulation profile are tenon-mortise connected, sealant is applied and fixed at the tenon-mortise connection.

[0021] Through the above technical scheme, composite profile No. I and composite profile No. II are both formed by mortise and tenon joints of aluminum alloy profile and PVC heat insulation profile. That is, the aluminum alloy profile No. I is connected to the PVC heat insulation profile No. I by mortise and tenon joints, and the aluminum alloy profile No. II is connected to the PVC heat insulation profile No. II by mortise and tenon joints. This method is easy to process on the one hand, and further enhances the heat insulation properties of the box board by the PVC heat insulation profile on the inner side on the other hand. The aluminum alloy profile and the PVC heat insulation profile are fixed by gluing with 502 glue, and the aluminum alloy profile and the PVC heat insulation profile cannot be loosened after gluing. This can improve the parallelism of the plane and the right angle of the right angle surface after the box board is formed, and can also improve the sealing of the box board.

[0022] Preferably, an outer slot I is provided at the lower right corner of the aluminum alloy profile No. I, an inner slot I is provided at the top of the PVC thermal insulation profile No. I, an outer slot II is provided at the lower left corner of the aluminum alloy profile No. II, an inner slot II is provided at the upper left corner of the PVC thermal insulation profile No. II, an outer lining plate is inserted into the outer slot I and the outer slot II, an inner lining plate is inserted into the inner slot I and the inner slot II, a cavity is formed between the composite profile No. I, the composite profile No. II, the outer lining plate and the inner lining plate, and the cavity is filled with polyurethane foam.

[0023] Through the above technical solution, the inner lining plate and the outer lining plate are directly assembled on the composite profile No. I and the composite profile No. II through the slots, which is convenient for installation.

[0024] Preferably, a reserved chamfer structure is provided at the upper right corner of the No. Ⅱ PVC insulation profile. When two No. Ⅱ composite profiles are symmetrically contacted and connected, the two reserved chamfer structures are connected to form a groove opening upward, and the formed groove is sealed with glue for secondary sealing.

[0025] Preferably, a hollow double-sided support structure is provided in the middle of the No. Ⅱ PVC thermal insulation profile, and a plurality of groups of reserved screw mounting holes are provided in the No. Ⅱ PVC thermal insulation profile directly above the hollow double-sided support structure. Screws pass through the reserved screw mounting holes to fix two groups of No. Ⅱ composite profiles and the flat profile, and sealing caps are plugged on the reserved screw mounting holes.

[0026] Through the above technical solution, the upper and lower surfaces of the flat profile are respectively connected to the box panel butt profile by two seams to ensure the connection strength. Screw installation holes are reserved, and there is no need to open separate holes to install screws. After the screws are installed, the sealing caps can be plugged to ensure the sealing and appearance.

[0027] Preferably, a triangular hollow structure is provided in the middle of the No. 1 PVC thermal insulation profile.

[0028] Preferably, the triangular hollow structure is a right triangle, and the hypotenuse of the right triangle is in the same inclination direction as the wavy surface concave-convex structure.

[0029] Through the above technical solution, the strength of the profile is ensured by utilizing the triangular support structure design of the PVC thermal insulation profile and the double-layer PVC thermal insulation profile support structure.

[0030] Beneficial effects of the utility model:

[0031] 1. When the box is connected at right angles, the concave and convex surfaces on the profile are in groove-type contact to avoid single-point contact, ensuring that the two box panels are in full contact. After the two box panels are buckled together, the concave and convex surfaces on the profile form multi-faceted support and limit at the connection, greatly improving the connection strength.

[0032] 2. When the box body is connected on the plane, the upper and lower surfaces of the flat profile are respectively connected to the box board butt surface profile to form two joints to ensure the connection strength.

[0033] 3. The aluminum alloy profile structure is formed by connecting multiple mutually perpendicular surfaces. The profile has high strength and is not easy to deform. The PVC insulation profile provides a thicker insulation thickness between the inner and outer panels of the box, which greatly improves the cold bridge performance of the box. The profile strength is ensured by increasing the thickness of the PVC insulation profile, designing the triangular support structure of the PVC insulation profile, and the double-layer PVC insulation profile support structure. The right-angle connection of the box board is forced to seal and compress the high-elastic sealing strip by bolts, and the inner panel of the flat joint is sealed with sealant, ensuring the air tightness of the box at the right-angle connection or flat connection of the box board.

[0034] 4. The utility model not only avoids the occurrence of cold bridges and condensation, but also has many advantages such as good thermal insulation effect, high structural strength, strong sealing performance, few types of profiles, convenient design and installation, beautiful appearance, and can meet the requirements of clean air conditioning.

Brief Description of the Drawings

[0035] Attached Figure 1 It is a cross-sectional view of the installation structure of the utility model;

[0036] Attached Figure 2 This is a schematic diagram of the assembly structure of the composite profile No. I of the utility model;

[0037] Attached Figure 3 It is a schematic diagram of the structure of No. I aluminum alloy profile of the utility model;

[0038] Attached Figure 4 This is a schematic diagram of the structure of No. 1 PVC thermal insulation profile of the utility model;

[0039] Attached Figure 5 This is a schematic diagram of the assembly structure of the No. Ⅱ composite profile of the utility model;

[0040] Attached Figure 6 It is a schematic diagram of the structure of the No. Ⅱ aluminum alloy profile of the utility model;

[0041] Appended Figure 7 is the schematic structural diagram of the No. II PVC heat-insulating profile of the present utility model;

[0042] Explanation of the reference numerals in the appended drawings:

[0043] 100. No. I aluminum alloy profile, 101. Outer clamping groove I, 102. Two-stage rectangular step, 103. Convex tooth structure, 104. Clamping groove, 105. Groove locking structure I;

[0044] 200. No. I PVC heat-insulating profile, 201. Inner clamping groove I, 202. Triangular hollow structure, 203. Convex groove locking structure I, 204. Wavy concave-convex structure;

[0045] 300. No. II aluminum alloy profile, 301. Outer clamping groove II, 302. Groove locking structure II, 303. Flat-through clamping groove;

[0046] 400. No. II PVC heat-insulating profile, 401. Inner clamping groove II, 402. Convex groove locking structure II, 403. Reserved chamfer structure, 404. Hollow double-sided support structure, 405. Reserved screw installation hole;

[0047] 500. Inner lining board; 600. Outer lining board; 700. High-elastic sealing strip; 800. Flat-through profile; 900. Sealing cap.

Specific implementation manners

[0048] The present utility model will be further described in detail below in conjunction with the appended drawings and specific implementation manners.

[0049] Example 1

[0050] A high-strength cold bridge-breaking forced-sealing frameless box. Refer to Figure 2-4, it is the No. I composite profile, which is composed of three parts: the No. I aluminum alloy profile 100, the No. I PVC heat-insulating profile 200, and the high-elastic sealing strip 700. The No. I aluminum alloy profile 100 is on the outer side of the box panel, and the No. I PVC heat-insulating profile 200 is on the inner side of the box panel. On the left side of the No. I aluminum alloy profile 100 is a closed cavity, and the upper left corner of the cavity is composed of two-stage rectangular steps 102, a clamping groove 104, and a vertical convex tooth structure 103. The closed cavity ensures sufficient profile strength at the right-angle splicing of the panels. The two-stage rectangular steps 102 form a stepped support for the side panels, ensuring sufficient support area of the bottom panel for the side panels during right-angle splicing. The clamping groove 104 and the vertical convex tooth structure 103 play a role in supporting and mutually limiting the two box panels at the right-angle splicing. At the lower right corner of the No. I aluminum alloy profile 100 is a slot structure for the outer lining plate 600 of the box panel, preventing the outer lining plate 600 from loosening and falling off later. At the upper right corner of the No. I aluminum alloy profile 100 is a groove locking structure I105, which is tenoned and mortised with the No. I PVC heat-insulating profile 200, with high connection strength.

[0051] The lower part of the No. I PVC heat-insulating profile 200 is a convex groove locking structure I203, the middle part is a triangular hollow structure 202, and the upper left part is a wavy concave-convex structure 204. The high-elastic sealing strip 700 is pasted on the wavy concave-convex structure 204. The upper part of the profile is a slot structure for the inner lining plate 500 of the box panel and an inner slot I201. The No. I PVC heat-insulating profile 200 is tenoned and mortised with the groove locking structure I105 at the top of the No. I aluminum alloy profile 100 through the lower convex groove locking structure I203. The triangular hollow structure 202 in the middle ensures the support strength of the PVC heat-insulating profile. In this embodiment, the triangular hollow structure is an isosceles right triangle. The long heat-insulating distance ensures the heat-insulating bridge-breaking performance of the box body. In addition, the wavy concave-convex structure 204 in the upper left part is pasted with the high-elastic sealing strip 700 to form a wavy sealing structure when the box panels are spliced at right angles. The wavy surface also plays a role of the third surface support for the side panels in addition to the support of the two-stage rectangular steps 102, ensuring the strength and stability of the whole box body after assembly. The slot structure for the inner lining plate 500 of the box panel in the upper part of the profile ensures that the inner lining plate 500 is always fixed in the slot after the box panel is framed, preventing the inner lining plate 500 from loosening and falling off, and at the same time increasing the strength of the box panel.

[0052] See Figure 5-7, the No. II composite profile has the following characteristics: It is composed of the No. II aluminum alloy profile 300 and the No. II PVC heat-insulating profile 400. The No. II aluminum alloy profile 300 is on the outer side of the box panel, and the No. II PVC heat-insulating profile 400 is on the inner side of the box panel. Multiple profile surfaces of the No. II aluminum alloy profile 300 are perpendicular to each other, and the cross-section is similar to an "S" structure, which has the characteristics of preventing bending and deformation in multiple directions and high profile strength. The upper part of the No. II aluminum alloy profile 300 is connected by tenon and mortise with the convex groove locking structure II402 of the No. II PVC heat-insulating profile 400 through the groove locking structure II302. The middle part of the No. II aluminum alloy profile 300 is a flat through groove 303 for section connection. After the flat section connection splice plates, both the upper and lower sides of the flat through groove 303 are connected to the box panels on both sides of the splice seam to form a double-sided connection, ensuring the section connection strength and also strengthening the support strength at the section connection. The lower left corner of the profile is a groove structure for the outer lining plate 600 of the box panel to prevent the outer lining plate 600 from loosening and falling off; the lower part of the No. II PVC heat-insulating profile 400 is a convex groove locking structure II402, the middle part is a hollow double-sided support structure 404, and the reserved chamfer structure 403 in the upper right corner is convenient for further sealant sealing after section connection. The upper left corner of the profile is a groove structure for the inner lining plate 500 of the box panel. The convex groove locking structure II402 at the lower part of the No. II PVC heat-insulating profile 400 is connected to the No. II aluminum alloy profile 300 by tenon and mortise. The middle hollow double-sided support structure 404 ensures the profile strength. In addition, the long-distance PVC heat insulation greatly improves the cold bridge prevention performance of the box body. Similarly, the groove structure for the inner lining plate 500 of the box panel is still set at the upper left corner of the profile to ensure the structural stability of the inner lining plate 500.

[0053] See Figure 1 , the high-strength cold bridge-breaking forced-sealing frameless box body is formed by combining two No. I composite profiles for the right-angle connection of the box body and two No. II composite profiles for the flat-section connection of the box body. The No. I composite profile is formed by tenon and mortise connection of the No. I aluminum alloy profile 100 and the No. I PVC heat-insulating profile 200, and a high-elastic sealing strip 700 is pasted on the No. I PVC heat-insulating profile 200. The No. II composite profile is formed by tenon and mortise connection of the No. II aluminum alloy profile 300 and the No. II PVC heat-insulating profile 400. After the four sides of the box panel are assembled with the composite profile and the inner and outer lining plates 600, they are integrally foamed with high-pressure polyurethane by a laminator. The thickness of the box panel formed in this embodiment is 50 mm.

[0054] When the box panel is connected at a right angle, the bottom plate supports the two-stage rectangular step 102 of the side plate, and the wavy surface is further supported and forced-sealed by bolt connection. The convex tooth structure 103 of the two No. I aluminum alloy profiles 100 is in surface contact with the clamping groove 104 for limiting structure.

[0055] When connecting the box board sections, two No. II composite profiles are butted flatly. The upper and lower double-sided connection is realized by placing a flat profile 800 in the flat groove 303 in the middle of the aluminum alloy profile, and it plays a role in strengthening the support and certain sealing for the butt joint seam. A sealing cap 900 is installed on the inner side of the box board to prevent the air inside the box from contacting the section connection screws so as to eliminate cold bridges. At the inner side butt joint seam of the box body section connection, sealant is used to perform secondary sealing on the butt joint seam, completely eliminating the problem of air leakage at the section connection butt joint. Both the No. I composite profile and the No. II composite profile are designed with outer lining board 600 grooves and inner lining board 500 grooves to prevent the loosening and falling off of the inner and outer lining boards 600. The entire box body structure is designed after comprehensive consideration in terms of strength, cold bridge breakage, sealing performance, profile types, etc. Therefore, this implementation method can solve the technical problems such as air leakage and cold bridge of the framed air handling unit and the poor strength, cold bridge breakage performance, and complex design and production of the frameless air handling unit box body at one time.

[0056] The above embodiments are only the implementation manners of the examples of the present invention. For those skilled in the art, based on the disclosed application methods and principles of the present invention, various types of improvements or deformations can be easily made, not limited to the structures or methods described in the above specific implementation manners of the present invention. Therefore, the above-described manner is only a preferred solution and does not have a restrictive meaning. All equivalent changes and modifications made according to the present invention are within the scope of protection of the claims of the present invention.

Claims

1. A high-strength cold-break bridge forced-sealing frameless box body, the box board of the box body includes a No. I composite profile, a No. II composite profile, an inner lining board (500) and an outer lining board (600). The No. I composite profile is formed by mortise-and-tenon connection of a No. I aluminum alloy profile (100) and a No. I PVC heat-insulating profile (200). The No. II composite profile is formed by mortise-and-tenon connection of a No. II aluminum alloy profile (300) and a No. II PVC heat-insulating profile (400). The No. I composite profile and the No. II composite profile are both designed with a clamping groove structure. The box board of the box body is integrally foamed after being assembled by the No. I composite profile, the No. II composite profile, the inner lining board (500) and the outer lining board (600), and then the box body is assembled by the integrally foamed box boards. It is characterized in that, The right-angle connection of the box body is formed by combining two No. I composite profiles, and the planar section connection of the box body is formed by combining two No. II composite profiles; On the left side of the No. I aluminum alloy profile (100), there are two-level rectangular steps (102). On the upper left corner of the No. I aluminum alloy profile (100), there is a convex tooth structure (103). A clamping groove (104) is formed between the convex tooth structure (103) and the two-level rectangular steps (102); On the left side surface of the No. I PVC heat-insulating profile (200), there is an inclined wavy concave-convex structure (204); When the box boards are right-angle connected, the convex tooth structure (103) of one of the No. I aluminum alloy profiles (100) is inserted into the clamping groove (104) of the other No. I aluminum alloy profile (100). At the same time, the two-level rectangular steps (102) of the two No. I aluminum alloy profiles (100) are abutted and supported against each other. Before connection, a high-elastic sealing strip (700) is attached to one of the wavy concave-convex structures (204). The wavy concave-convex structures (204) of the two No. I PVC heat-insulating profiles (200) approach each other and squeeze and contact the high-elastic sealing strip (700). When connecting, the two No. I aluminum alloy profiles (100) are also connected by bolts and blind rivet nuts; The No. II aluminum alloy profile (300) has multiple mutually perpendicular profile surfaces, and the cross-section is in an "S" shape. In the middle of the right side of the No. II aluminum alloy profile (300), there is a flat-through clamping groove (303); When the box board sections are connected, the two No. II composite profiles are symmetrically contacted and butted. The flat-through clamping grooves (303) of the two No. II aluminum alloy profiles (300) are just connected. A flat-through profile (800) is placed in the connected flat-through clamping groove (303), and then the flat-through profile (800) is fixed to the left and right two No. II composite profiles by screws.

2. The high-strength cold-break bridge forced-sealing frameless box according to claim 1, characterized in that The upper right corner of the No. I aluminum alloy profile (100) is provided with a groove locking structure I (105), and the bottom of the No. I PVC heat insulation profile (200) is provided with a convex groove locking structure I (203). When the No. I aluminum alloy profile (100) is tenoned and mortised with the No. I PVC heat insulation profile (200), the convex groove locking structure I (203) of the No. I PVC heat insulation profile (200) is inserted into the groove locking structure I (105) of the No. I aluminum alloy profile (100).

3. The high-strength cold-break bridge forced-sealing frameless box according to claim 1, wherein The top of the No. II aluminum alloy profile (300) is provided with a groove locking structure II (302), and the bottom of the No. II PVC heat insulation profile (400) is provided with a convex groove locking structure II (402). When the No. II aluminum alloy profile (300) is tenoned and mortised with the No. II PVC heat insulation profile (400), the convex groove locking structure II (402) of the No. II PVC heat insulation profile (400) is inserted into the groove locking structure II (302) of the No. II aluminum alloy profile (300).

4. The high-strength cold-break bridge forced-sealing frameless box according to claim 2 or 3, characterized in that, After the No. I aluminum alloy profile (100) is tenoned and mortised with the No. I PVC heat insulation profile (200), and after the No. II aluminum alloy profile (300) is tenoned and mortised with the No. II PVC heat insulation profile (400), sealant is applied for fixation at the tenon and mortise joints.

5. The high-strength cold-break bridge forced-sealing frameless box according to claim 1, characterized in that, The lower right corner of the No. I aluminum alloy profile (100) is provided with an outer card slot I (101), the top of the No. I PVC heat insulation profile (200) is provided with an inner card slot I (201), the lower left corner of the No. II aluminum alloy profile (300) is provided with an outer card slot II (301), and the upper left corner of the No. II PVC heat insulation profile (400) is provided with an inner card slot II (401). An outer lining plate (600) is inserted into the outer card slot I (101) and the outer card slot II (301), and an inner lining plate (500) is inserted into the inner card slot I (201) and the inner card slot II (401). A cavity is formed among the No. I composite profile, the No. II composite profile, the outer lining plate (600), and the inner lining plate (500), and polyurethane foam is filled in the cavity.

6. The high-strength cold-break bridge forced-sealing frameless box according to claim 1, characterized in that, The upper right corner of the No. II PVC heat insulation profile (400) is provided with a reserved chamfer structure (403). When two No. II composite profiles are symmetrically in contact connection, the two reserved chamfer structures (403) are connected into a concave groove with an upward opening, and sealant is applied for secondary sealing in the formed concave groove.

7. The high-strength cold-break bridge forced-sealing frameless box according to claim 1, characterized in that, The middle part of the No. II PVC heat insulation profile (400) is provided with a hollow double-sided support structure (404). The No. II PVC heat insulation profile (400) is provided with multiple groups of reserved screw installation holes (405) directly above the hollow double-sided support structure (404). Screws pass through the reserved screw installation holes (405) to fix two groups of No. II composite profiles and the flat channel profile (800), and a sealing cap (900) is plugged on the reserved screw installation holes (405).

8. The high-strength cold-break bridge forced-sealing frameless box according to claim 1, characterized in that, The middle part of the No. I PVC heat insulation profile (200) is provided with a triangular hollow structure (202).

9. The high-strength cold-break bridge forced-sealing frameless box according to claim 8, wherein, The triangular hollow structure (202) is a right triangle, and the hypotenuse of the right triangle is in the same inclined direction as the inclined direction of the wavy concave-convex structure (204).

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