Brand-new open type foaming process refrigeration compartment and compartment body plate structure and manufacturing process thereof

Abstract

The invention belongs to the field of refrigerated carriages, and particularly relates to a brand-new open type foaming process refrigerated carriage and carriage body plate structure and a manufacturing process thereof.The refrigerated carriage body is composed of a bottom plate, side plates, a top plate and a front plate, the side plates are arranged on the two sides of the top of the bottom plate, the top plate is arranged over the bottom plate, and the top plate is located at the tops of the side plates; according to the invention, a secondary pouring foaming refrigeration compartment body splicing process is adopted, open foaming process cold-bridge-free structural plates are adopted in a plate structure, and the interior and the exterior of the refrigeration compartment body are spliced in a manner of riveting aluminum alloy sections of a special two-sealant groove structure; and the side plates are arranged on the two sides of the bottom of the top plate, and the front plate is arranged at the front end of a frame body formed by the bottom plate, the side plates and the top plate. Secondary high-pressure pouring foaming is carried out in a closed cavity formed at the connecting positions of all the plates, polyurethane foam layers of all the plates of the compartment body form a closed-loop structure, the overall air tightness and heat preservation performance of the compartment body are greatly improved, and the heat conductivity coefficient of the whole compartment is 0.03 or below.

Description

Technical Field

[0001] The invention belongs to the field of refrigerated compartments, and in particular to a completely new structure of a refrigerated compartment and a compartment body plate material using an open foaming process and a manufacturing process thereof. Background Art

[0002] Traditional refrigerated compartments generally use the "sandwich" board process or the "closed foaming" process. In terms of assembly, wooden square frames and embedded iron structures are used, and the assembly of the compartment is completed through extended bolt connections and structural adhesive bonding;

[0003] However, there are some problems with the traditional refrigerated compartment assembly process and plate structure:

[0004] First, the cold bridge problem. Cold bridges will form at the joints between the structural glue and the wood, which will affect the thermal insulation performance of the refrigerated compartment, causing heat to be more easily transferred through these parts, which is not conducive to maintaining the stable temperature inside the compartment.

[0005] Secondly, the airtightness and heat transfer coefficient are poor. Since the compartment has not been treated with secondary infusion foaming, the airtightness of the entire compartment is poor. In the traditional refrigerated compartment structure, the connecting parts of different materials may form cold bridges. For example, when using wooden square frames and embedded iron structures, since the thermal conductivity of wood and metal is larger than that of foamed materials, heat is more easily transferred through these materials in the contact area. In the actual use of refrigerated compartment refrigeration, the cold in the compartment will form (cold bridges) along these connecting parts with good thermal conductivity and be transferred to the outside of the compartment, resulting in the loss of cold energy, reducing the insulation performance of the compartment and increasing the demand for cold energy from the refrigeration machine;

[0006] Traditional refrigerated compartment assembly process and panel structure: The general panel structure adopts the "sandwich" panel process or the "closed foaming" process, and is assembled by means of wooden square frames and embedded iron structures, extended bolt connections and structural adhesive bonding. Cold bridges will be formed at the connections between the structural adhesive and the wooden squares. Since it is not subjected to secondary infusion and foaming, the overall airtightness and heat transfer coefficient of the compartment are poor.

[0007] To this end, the present invention provides a new open foaming process refrigerated compartment and compartment body plate structure and manufacturing process thereof. Summary of the invention

[0008] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0009] The technical solution adopted by the present invention to solve its technical problems is: the structure of a new open foaming process refrigerated compartment and compartment plate material and its manufacturing process described in the present invention, the refrigerated compartment body is composed of a bottom plate, side plates, a top plate and a front plate, side plates are arranged on both sides of the top of the bottom plate, a top plate is arranged directly above the bottom plate, the top plate is located on the top of the side plates, and side plates are arranged on both sides of the bottom of the top plate, and a front plate is arranged at the front end of the frame composed of the bottom plate, the side plates and the top plate.

[0010] Preferably, the side panels, top panel and front panel are composed of two high-strength skin panels, C-shaped roll-rolled high-strength steel metal strips, U-shaped roll-rolled high-strength steel frames and Y-shaped polymer composite profile frames. Two high-strength skin panels are arranged on the inner and outer sides of the panels, and Y-shaped polymer composite profile frames are arranged on both sides of the panels. U-shaped roll-rolled high-strength steel frames are arranged on the tops of the two groups of Y-shaped polymer composite profile frames, and the two sides of the bottom of the U-shaped roll-rolled high-strength steel frames are connected to the Y-shaped polymer composite profile frames.

[0011] Preferably, the base plate is composed of an H-shaped polymer composite profile frame, an I-shaped steel-plastic reinforced structural cross beam, a fort-shaped aluminum alloy ventilation groove and a high-strength skin plate. An I-shaped steel-plastic reinforced structural cross beam is arranged inside the base plate, and H-shaped polymer composite profile frames are arranged on both sides of the I-shaped steel-plastic reinforced structural cross beam. The top of the H-shaped polymer composite profile frame is arranged with a fort-shaped aluminum alloy ventilation groove, and the bottom of the I-shaped steel-plastic reinforced structural cross beam is arranged with a high-strength skin plate.

[0012] Preferably, a cavity is formed at the connection between the bottom plate, the side plate, the top plate and the front plate, and the cavity is foamed and filled by secondary high-pressure infusion of polyurethane foam material.

[0013] Preferably, the side panels, top panel and front panel use a Y-shaped polymer composite profile frame as the frame of the panel's suspended cold-bridge-free all-metal frame structure, and the Y-shaped polymer composite profile frame is riveted to the U-shaped rolled high-strength steel frame to form a suspended cold-bridge-free all-metal frame structure inside the panel.

[0014] Preferably, the H-shaped polymer composite profile frame is bolted to the I-shaped steel-plastic reinforced structural beam to form the internal frame structure of the base plate, and the base plate frame is fully welded with fort-shaped aluminum alloy ventilation grooves to form the overall frame structure of the base plate.

[0015] Preferably, the inner plate connections of the side panels, top panels and front panels are connected by riveting after gluing using angle aluminum with double sealant grooves, and the outer plate connections of the side panels, top panels and front panels are connected by riveting after gluing using outer-clad aluminum alloy profiles with sealant grooves.

[0016] Preferably, the inner plate connections of the bottom plate, side plate and front plate are made of L-shaped aluminum alloy guard plate profiles, which are riveted to the side plates after gluing and fully welded to the castle-shaped aluminum alloy ventilation grooves. The outer plate connections of the bottom plate, side plate and front plate are made of K-shaped aluminum alloy profiles, which are riveted after gluing.

[0017] Preferably, a cavity is formed at the connection between the bottom plate, the side plate, the top plate and the front plate, and the cavity is foamed and filled by secondary high-pressure injection of polyurethane foam material.

[0018] A manufacturing process of a new refrigerated compartment structure using an open foaming process includes the following steps:

[0019] S1. Bottom plate forming: Connect the I-shaped steel-plastic reinforced structural crossbeam and the H-shaped polymer composite profile frame bolts to build the internal frame foundation structure of the bottom plate. Then, perform the open foaming process on the built frame, inject the prepared polyurethane foam material into the frame according to the predetermined process parameters and process, ensure that the foam material evenly fills the frame space, and form a stable core part of the thermal insulation layer. When the foam material is sprinkled but not yet risen, the high-strength skin plate is immediately covered by the open foaming equipment. The open foaming equipment is immediately molded in the sprinkler order to ensure the consistency of size. Through a strict installation process, it is ensured to be tightly fitted and stable, and the bottom plate forming process is completed.

[0020] S2. Forming of side panels, top panels and front panels: The Y-shaped polymer composite profile frame is used as the core frame component, and the riveting process is used to accurately connect it with the U-shaped roll-pressed high-strength steel frame to construct an internal suspended cold bridge-free all-metal frame structure for each panel. After the frame structure is completed, high-strength skin panels are installed on both sides of the frame, and an open foaming process is performed between the two layers of high-strength skin panels to inject polyurethane foam material. Professional foaming technology is used to ensure that the foam material is evenly distributed and filled to complete the forming of the side panels, top panels and front panels;

[0021] S3, car body assembly: place the formed bottom plate on the positioning platform, install side plates on both sides of the top of the bottom plate to form a stable car body side support structure, accurately install the top plate on the top of the side plates, make the two sides of the bottom of the top plate firmly connected with the side plates, build the top frame structure of the car body, install the front plate at the front end of the frame composed of the bottom plate, side plates and top plate to form the whole car body;

[0022] S4. Secondary perfusion: The cavity formed by the connection between the bottom plate, side plate, top plate and front plate is perfused for the second time. The secondary high-pressure perfusion foaming filling can eliminate the tiny gaps and cavities caused by the connection of the plates, and at the same time connect the foaming materials between adjacent plates to form an integral structure of the car body.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The present invention discloses a new open foaming process refrigerated compartment and compartment panel structure and its manufacturing process. The refrigerated compartment assembly process and panel structure adopt an open foaming process without cold bridge structure panels, and the inside and outside are assembled by riveting aluminum alloy profiles with a special two-line sealing adhesive groove structure. Secondary high-pressure perfusion foaming is carried out in the closed cavity formed at the connection of all panels. The polyurethane foam layer of all the panel materials of the compartment forms a closed-loop structure, and the overall air tightness and thermal insulation of the compartment are greatly improved. The thermal conductivity of the whole compartment is below 0.03.

[0025] 2. The structure and manufacturing process of a new open foaming process refrigerated compartment and compartment panel material described in the present invention, the side panels use glass fiber reinforced plastic outer panels, aluminum alloy reinforcement profiles are added in the middle, polyurethane foam material is sprinkled, and the inner panels use PP-FRP panels. The foam material is directly foamed and self-adhesive. Therefore, the overall weight is lighter and the air tightness is better. The unit weight of 70MM plate thickness = foam weight 3290 + glass fiber reinforced plastic outer panel 2.64 + thermoplastic plate inner panel 1.56 + aluminum reinforcement profile = 10.23KG / square, which is about 30% lighter than the traditional process.

[0026] 3. The structure and manufacturing process of a brand-new open foaming process refrigerated compartment and compartment panel material described in the present invention, the compartment floor is made of a fiberglass bottom outer panel, a wooden crossbeam is laid on it, and an air guide groove is laid on the crossbeam. After open mold spraying and foaming, the polyurethane foam material is self-bonded in the foaming process, thereby eliminating the two layers of checkered cloth and three layers of adhesive resin, the wooden crossbeam resin wrapped reinforcement layer, 18MM plywood, etc. in the traditional process. Therefore, the weight is 25% lighter than the traditional process floor. Since the foam is foamed as a whole, compared with the floor produced by the traditional process using the small piece splicing process, the overall structural strength and air tightness are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is the overall structural diagram of the present invention;

[0029] Figure 2 It is a front view of the structure cross-section of the present invention;

[0030] Figure 3 It is a front view structural cross-sectional view of the side plate, top plate and front plate in the present invention;

[0031] Figure 4 This is a front view of the structure of the connection between the side plate and the top plate in the present invention;

[0032] Figure 5 The present invention Figure 4Middle A shows the enlarged structure diagram;

[0033] Figure 6 It is a front view structural cross-sectional view of the bottom plate in the present invention;

[0034] Figure 7 It is a front view cross-sectional view of the connection structure of the side plate and the bottom plate in the present invention;

[0035] Figure 8 The present invention Figure 7 The structure diagram at B is enlarged;

[0036] Fig. 9 It is a diagram of the traditional process carriage side panel structure and the finished panel structure in the present invention;

[0037] Fig.10 It is a diagram of the open foaming process carriage side panel structure and the finished panel structure in the present invention;

[0038] Fig.11 This is a structural diagram of a conventional carriage floor in the present invention;

[0039] Fig.12 It is a structural diagram of the open foaming process bottom plate in the present invention.

[0040] In the figure: 1. Bottom plate; 101. H-shaped polymer composite profile frame; 102. I-shaped steel-plastic reinforced structural beam; 103. Castle-shaped aluminum alloy ventilation slot; 104. High-strength skin sheet material one; 2. Side plate; 201. High-strength skin sheet material two; 202. C-shaped roll-pressed high-strength steel metal strip; 203. U-shaped roll-pressed high-strength steel skeleton; 204. Y-shaped polymer composite profile frame; 3. Top plate; 4. Front plate; 5. Angle aluminum; 6. L-shaped aluminum alloy guard plate profile; 7. K-shaped aluminum alloy profile; 8. Outer aluminum alloy profile. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0042] like Figures 1 to 12 As shown, a new open foaming process refrigeration compartment and compartment plate structure and its manufacturing process according to an embodiment of the present invention, the refrigeration compartment body is composed of a bottom plate 1, side plates 2, a top plate 3 and a front plate 4, side plates 2 are arranged on both sides of the top of the bottom plate 1, a top plate 3 is arranged directly above the bottom plate 1, the top plate 3 is located on the top of the side plates 2, and side plates 2 are arranged on both sides of the bottom of the top plate 3, and a front plate 4 is arranged at the front end of the frame composed of the bottom plate 1, the side plates 2 and the top plate 3.

[0043] The side panels 2, top panel 3 and front panel 4 are composed of a high-strength skin plate 201, a C-shaped roll-rolled high-strength steel metal strip 202, a U-shaped roll-rolled high-strength steel frame 203 and a Y-shaped polymer composite profile frame 204. The high-strength skin plate 201 is arranged on the inner and outer sides of the plate, and the Y-shaped polymer composite profile frame 204 is arranged on both sides of the plate. The top of the two groups of Y-shaped polymer composite profile frames 204 is arranged with a U-shaped roll-rolled high-strength steel frame 203, and the two sides of the bottom of the U-shaped roll-rolled high-strength steel frame 203 are connected to the Y-shaped polymer composite profile frame 204.

[0044] In the top plate, two side plates and front plate of the refrigerated compartment, the C-shaped roll-formed high-strength steel metal strip 202, the U-shaped roll-formed high-strength steel frame 203 and the Y-shaped polymer composite profile frame 204 are connected by welding to form a suspended cold bridge-free all-metal frame structure, and then an open-type "polyurethane foam material" is used for an open mold spray foaming process to form an integrally foamed thermal insulation composite board.

[0045] like Figures 1 to 10 As shown, the bottom plate 1 is composed of an H-shaped polymer composite profile frame 101, an I-shaped steel-plastic reinforced structural cross beam 102, a fort-shaped aluminum alloy ventilation groove 103 and a high-strength skin plate 104. The inside of the bottom plate 1 is provided with an I-shaped steel-plastic reinforced structural cross beam 102, and both sides of the I-shaped steel-plastic reinforced structural cross beam 102 are provided with an H-shaped polymer composite profile frame 101, the top of the H-shaped polymer composite profile frame 101 is provided with a fort-shaped aluminum alloy ventilation groove 103, and the bottom of the I-shaped steel-plastic reinforced structural cross beam 102 is provided with a high-strength skin plate 104.

[0046] The H-shaped polymer composite profile frame 101 of the refrigerated compartment bottom plate 1 is bolted to the I-shaped steel-plastic reinforced structural cross beam 102 to form the frame of the bottom plate 1. The frame of the refrigerated compartment bottom plate 1 is filled with welded castle-shaped aluminum alloy ventilation grooves 103 to form the overall frame of the refrigerated compartment bottom plate 1, and then an open polyurethane open mold spray foaming process is used to form an integrally foamed compartment bottom plate assembly.

[0047] A cavity is formed at the plate connection points of the bottom plate 1, the side plate 2, the top plate 3 and the front plate 4, and the cavity is foamed and filled by secondary high-pressure injection of polyurethane foam material.

[0048] The side panels 2, top panel 3 and front panel 4 are connected by riveting with a Y-shaped polymer composite profile frame 204 as a suspended cold-bridge-free all-metal frame structure for the panel. The Y-shaped polymer composite profile frame 204 is connected with a U-shaped roll-pressed high-strength steel frame 203 to form a suspended cold-bridge-free all-metal frame structure inside the panel.

[0049] The H-shaped polymer composite profile frame 101 is bolted to the I-shaped steel-plastic reinforced structural beam 102 to form the internal frame structure of the bottom plate 1. The frame of the bottom plate 1 is fully welded with a fort-shaped aluminum alloy ventilation groove 103 to form the overall frame structure of the bottom plate 1.

[0050] The inner plate connections of the side panels 2, top panels 3 and front panels 4 are connected by riveting after gluing with angle aluminum 5 with double sealant grooves, and the outer plate connections of the side panels 2, top panels 3 and front panels 4 are connected by riveting after gluing with outer aluminum alloy profiles 8 with sealant grooves.

[0051] The inner plate connections of the bottom plate 1, the side plate 2 and the front plate 4 are made of L-shaped aluminum alloy guard plate profile 6, which is riveted to the side plate 2 after gluing and fully welded to the fort-shaped aluminum alloy ventilation groove 103. The outer plate connections of the bottom plate 1, the side plate 2 and the front plate 4 are made of K-shaped aluminum alloy profile 7, which is riveted after gluing.

[0052] The connection between the bottom plate 1, the side plate 2, the top plate 3 and the front plate 4 forms a cavity, which is filled with foam by secondary high-pressure injection of polyurethane foam. After foaming and filling, the thermal insulation core of each plate achieves a complete closed loop: no cold bridge transmission, fully enclosed.

[0053] A manufacturing process of a new refrigerated compartment structure using an open foaming process includes the following steps:

[0054] S1, forming of the bottom plate 1: bolting the I-shaped steel-plastic reinforced structural cross beam 102 and the H-shaped polymer composite profile frame 101 to construct the internal frame foundation structure of the bottom plate 1, and then performing an open foaming process on the built frame to inject the prepared polyurethane foam material into the frame according to the predetermined process parameters and flow, ensuring that the foam material evenly fills the frame space to form a stable core part of the heat insulation layer. When the foam material is sprinkled but not yet risen, the high-strength skin plate 104 is immediately covered by the open foaming equipment, and the open foaming equipment is immediately molded in the sprinkler order to ensure the consistency of size, and through a strict installation process to ensure its close fit and stability, the forming process of the bottom plate 1 is completed;

[0055] S2, side panels 2, top panels 3 and front panels 4 are formed: the Y-shaped polymer composite profile frame 204 is used as the core frame component, and the riveting process is used to accurately connect it with the U-shaped roll-pressed high-strength steel frame 203 to construct an internal suspended cold bridge-free all-metal frame structure of each plate. After the frame structure is completed, high-strength skin sheet material 201 is installed on both sides of it, and an open foaming process is performed between the two layers of high-strength skin sheet material 201 to inject polyurethane foam material. Professional foaming technology is used to ensure that the foam material is evenly distributed and filled, and the side panels 2, top panels 3 and front panels 4 are formed;

[0056] S3, assembly of the box body: placing the formed bottom plate 1 on the positioning platform, installing the side plates 2 on both sides of the top of the bottom plate 1 to form a stable side support structure of the box body, accurately installing the top plate 3 on the top of the side plates 2, making the two sides of the bottom of the top plate 3 firmly connected with the side plates 2, constructing the top frame structure of the box body, installing the front plate 4 at the front end of the frame body composed of the bottom plate 1, the side plates 2 and the top plate 3 to form the entire box body;

[0057] S4. Secondary perfusion: The cavity formed by the connection between the bottom plate 1, the side plate 2, the top plate 3 and the front plate 4 is perfused for the second time with high pressure. The secondary high pressure perfusion foaming filling can eliminate the tiny gaps and cavities caused by the connection of the plates, and at the same time connect the foaming materials between the adjacent plates to form an integral structure of the compartment.

[0058] It should be noted here that:

[0059] First, if Fig. 9 and Fig.10 As shown, the traditional process car side panel uses two layers of fiberglass plates, two layers of 600g / m2 felt and Z-shaped reinforcing felt in the middle, and two layers of adhesive resin (about 2400g / m2) and small pieces of foam for bonding. 70MM plate unit weight = foam weight 3290g + 600g felt X2 + 1200g resin X2 + fiberglass inner and outer panels 2.64X2 + Z-shaped reinforcing felt = 14.84KG / m2;

[0060] The open foaming process uses a fiberglass outer panel with aluminum alloy reinforcement profiles in the middle and polyurethane foam material sprinkled on it. The inner panel uses PP-FRP sheet material. The foam material is directly foamed and self-adhesive. Therefore, the overall weight is lighter and the air tightness is better. The unit weight of 70MM plate thickness = foam weight 3290 + fiberglass outer panel 2.64 + thermoplastic inner panel 1.56 + aluminum reinforcement profile = 10.23KG / square, which is about 30% lighter than the traditional process.

[0061] Secondly, if Fig.11 and Fig.12 As shown, the traditional process of the car floor is: use resin glue to bond the fiberglass inner and outer panels, 3 layers of 600G checkered cloth, wooden beams and resin wrapped reinforcement layers, small pieces of polyurethane foam, 18MM thick plywood reinforcement layers are composited and then aluminum alloy air guide grooves are added.

[0062] The open foaming process car floor: a fiberglass bottom outer panel with wooden crossbeams on it and air guide grooves on the crossbeams. After open mold spraying and foaming, the polyurethane foam self-bonds during the foaming process. Therefore, the two layers of checkered cloth and three layers of adhesive resin, the wooden crossbeam resin wrapped reinforcement layer, 18MM plywood, etc. in the traditional process are omitted. Therefore, the weight is 25% lighter than the traditional process floor. Since the foam is foamed as a whole, the overall structural strength and air tightness are higher than the floor produced by the traditional process of small piece splicing process.

[0063] Finally, the traditional refrigerated compartment assembly process and plate structure are assembled by using wooden square frames and embedded iron structures, extended bolt connections and structural adhesive bonding. Cold bridges will form at the joints between the structural adhesive and the wooden squares. Since there is no secondary infusion foaming, the overall air tightness and heat transfer coefficient of the compartment are poor. The heat transfer coefficient of the entire compartment is between 0.38-0.40, and the air tightness of the entire compartment is less than 50% of the secondary infusion foaming compartment assembly process.

[0064] The secondary injection foaming refrigerated compartment assembly process and panel structure adopt open foaming process without cold bridge structure panels, and the inside and outside are assembled by riveting aluminum alloy profiles with two special sealant groove structures. Secondary high-pressure injection foaming is carried out in the closed cavity formed at the connection of all panels, and the polyurethane foam layer of all panels in the compartment forms a closed-loop structure, which greatly improves the overall air tightness and thermal insulation of the compartment, and the thermal conductivity of the entire compartment is below 0.03.

[0065] It should be noted here that the open foaming process can produce more closed-cell structures, which is one of the key factors in improving the performance of the refrigerated compartment. Closed-cell means that the cells inside the foaming material are independently closed, and these closed cells are like tiny "thermos bottles". When external heat tries to enter the refrigerated compartment through conduction, convection or radiation, the gas in the closed-cell structure, mainly the gas generated during the foaming process, acts as a barrier.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A new open foaming process refrigerated compartment and compartment plate structure and manufacturing process, characterized in that: The refrigeration box body is composed of a bottom plate (1), side plates (2), a top plate (3) and a front plate (4); the side plates (2) are arranged on both sides of the top of the bottom plate (1); the top plate (3) is arranged directly above the bottom plate (1); the top plate (3) is located on the top of the side plates (2); and the side plates (2) are arranged on both sides of the bottom of the top plate (3); and the front plate (4) is arranged at the front end of the frame body composed of the bottom plate (1), the side plates (2) and the top plate (3).

2. According to claim 1, the structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material are characterized by: The side panels (2), the top panel (3) and the front panel (4) are composed of two high-strength skin panels (201), a C-shaped roll-pressed high-strength steel metal strip (202), a U-shaped roll-pressed high-strength steel frame (203) and a Y-shaped polymer composite profile frame (204); the two high-strength skin panels (201) are arranged on the inner and outer sides of the panels, the Y-shaped polymer composite profile frames (204) are arranged on both sides of the panels, the tops of the two groups of Y-shaped polymer composite profile frames (204) are arranged with U-shaped roll-pressed high-strength steel frames (203), and the two sides of the bottom of the U-shaped roll-pressed high-strength steel frame (203) are connected to the Y-shaped polymer composite profile frames (204).

3. According to claim 2, a new open foaming process refrigerated compartment and compartment plate structure and manufacturing process thereof are characterized by: The bottom plate (1) is composed of an H-shaped polymer composite profile frame (101), an I-shaped steel-plastic reinforced structural cross beam (102), a fort-shaped aluminum alloy ventilation groove (103) and a high-strength skin plate (104). The bottom plate (1) is provided with an I-shaped steel-plastic reinforced structural cross beam (102) inside, and H-shaped polymer composite profile frames (101) are provided on both sides of the I-shaped steel-plastic reinforced structural cross beam (102). The top of the H-shaped polymer composite profile frame (101) is provided with a fort-shaped aluminum alloy ventilation groove (103), and the bottom of the I-shaped steel-plastic reinforced structural cross beam (102) is provided with a high-strength skin plate (104).

4. According to claim 3, the structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material are characterized by: A cavity is formed at the plate connection points of the bottom plate (1), the side plate (2), the top plate (3) and the front plate (4), and the cavity is foamed and filled by secondary high-pressure injection of polyurethane foam material.

5. According to claim 4, the structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material are characterized by: The side panels (2), the top panel (3) and the front panel (4) are connected by riveting with a Y-shaped polymer composite profile frame (204) as the frame of the suspended cold-bridge-free all-metal frame structure of the panel, and the Y-shaped polymer composite profile frame (204) is connected with a U-shaped roll-pressed high-strength steel frame (203) to form a suspended cold-bridge-free all-metal frame structure inside the panel.

6. The structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material according to claim 5 are characterized by: The H-shaped polymer composite profile frame (101) is bolted to the I-shaped steel-plastic reinforced structural cross beam (102) to form an internal frame structure of the bottom plate (1), and the frame of the bottom plate (1) is fully welded with a fort-shaped aluminum alloy ventilation groove (103) to form an overall frame structure of the bottom plate (1).

7. The structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material according to claim 6 are characterized by: The inner plate connection between the side plate (2), the top plate (3) and the front plate (4) is connected by riveting after gluing, and the outer plate connection between the side plate (2), the top plate (3) and the front plate (4) is connected by riveting after gluing.

8. The structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material according to claim 7 are characterized by: The inner plate connection between the bottom plate (1), the side plate (2) and the front plate (4) is connected by an L-shaped aluminum alloy guard plate profile (6) which is riveted to the side plate (2) after gluing and fully welded to the fort-shaped aluminum alloy ventilation groove (103), and the outer plate connection between the bottom plate (1), the side plate (2) and the front plate (4) is connected by a K-shaped aluminum alloy profile (7) which is riveted after gluing.

9. The structure and manufacturing process of the new open foaming process refrigerated compartment and compartment board material according to claim 8 are characterized by: A cavity is formed at the connection between the bottom plate (1), the side plate (2), the top plate (3) and the front plate (4), and the cavity is foamed and filled by secondary high-pressure injection of polyurethane foam material.

10. The structure and manufacturing process of a new open foaming process refrigerated compartment and compartment board material according to claims 1-9, characterized in that: The manufacturing process of the new refrigerated compartment structure using the open foaming process includes the following steps: S1. Forming of the bottom plate (1): Bolt the I-shaped steel-plastic reinforced structural cross beam (102) and the H-shaped polymer composite profile frame (101) to construct the internal frame foundation structure of the bottom plate (1). Then, perform an open foaming process on the constructed frame to inject the prepared polyurethane foam material into the frame according to the predetermined process parameters and flow, ensuring that the foam material evenly fills the frame space to form a stable core part of the heat insulation layer. When the foam material is sprinkled but not yet risen, the high-strength skin plate (104) is immediately covered by the open foaming equipment. The open foaming equipment is immediately molded according to the sprinkler sequence to ensure the consistency of size. Through a strict installation process, it is ensured that it is tightly fitted and stable, and the forming process of the bottom plate (1) is completed. S2, forming of the side panels (2), top panel (3) and front panel (4): using a Y-shaped polymer composite profile frame (204) as the core frame component, it is precisely connected to the U-shaped roll-pressed high-strength steel frame (203) by riveting technology to construct an internal suspended cold bridge-free all-metal frame structure for each panel. After the frame structure is completed, high-strength skin sheet material 2 (201) is installed on both sides of the frame structure, and an open foaming process is performed between the two layers of high-strength skin sheet material 2 (201) to inject polyurethane foam material. A professional foaming process is used to ensure that the foam material is evenly distributed and filled, and the forming and manufacturing of the side panels (2), top panel (3) and front panel (4) are completed; S3, assembly of the box body: placing the formed bottom plate (1) on the positioning platform, installing the side plates (2) on both sides of the top of the bottom plate (1) to form a stable side support structure of the box body, accurately installing the top plate (3) on the top of the side plates (2), making the two sides of the bottom of the top plate (3) firmly connected to the side plates (2), constructing the top frame structure of the box body, installing the front plate (4) at the front end of the frame body composed of the bottom plate (1), the side plates (2) and the top plate (3), and forming the entire box body; S4. Secondary injection: The cavity formed by the connection between the bottom plate (1), the side plate (2), the top plate (3) and the front plate (4) is injected with secondary high-pressure injection. The secondary high-pressure injection foaming filling eliminates the tiny gaps and cavities generated by the connection between the plates, and at the same time connects the foaming materials between the adjacent plates, so that the box body forms an integral structure.

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