Box body structure of refrigeration equipment

Abstract

The utility model provides a box body structure of refrigeration equipment. The box body structure comprises a shell, an inner container and a foaming space, a back plate is formed on the back side of the shell; the inner container is accommodated in the shell; the foaming space is arranged between the shell and the inner container; wherein the back plate is provided with a plurality of material injection holes used for injecting foaming materials into the foaming space and a plurality of negative pressure holes used for extracting gas in the foaming space, and the material injection holes are formed in the peripheral side of the back plate at intervals so as to communicate with the foaming space; the multiple negative pressure holes are close to the middle of the back plate and are formed in the back plate at intervals so as to guide the stroke tail end of the foaming material to be gathered at the negative pressure holes. When the foaming material is foamed, the negative pressure hole pumps out air in the foaming space, on one hand, the resistance of the foaming material in the flowing process can be reduced, and on the other hand, the foaming material can be guided to gather at the negative pressure hole at the tail end of the flowing stroke to avoid the problem of material vacancy, so that the stable product quality of the box body structure can be ensured, and the production efficiency is improved. And product performance deterioration is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration boxes, and particularly relates to a box body structure of a refrigeration device. Background Art

[0002] Refrigeration devices include refrigerators, freezers, etc., which can refrigerate and freeze items to extend the shelf life of the items. The refrigeration device includes a box body structure. The box body structure includes an outer shell and an inner liner, and the outer shell is hermetically connected to the inner liner so that a foaming space is formed between the outer shell and the inner liner. The outer shell includes a back plate, a left side plate, a right side plate, a top side plate, and a bottom side plate.

[0003] In the production process of the box body structure of the refrigeration device, the widely used foaming process is the traditional single-gun foaming at the bottom of the box body. The specific process of this foaming process is as follows: a material injection hole is opened on the bottom side plate, and a single injection gun communicates with the foaming space through the material injection hole on the bottom side plate to inject the foaming material into the foaming space, so that the foaming material foams in the foaming space to form a foaming layer.

[0004] However, when the single-gun foaming is adopted for the box body structure, due to the complex structure inside the box body structure, the flow stroke of the foaming material is relatively long, resulting in poor state at the end of the flow stroke of the foaming material, difficult exhaust and easy occurrence of the problem of material void, thus causing unstable product quality or deteriorated product performance of the box body structure. Summary of the Utility Model

[0005] The purpose of this application is to provide a box body structure of a refrigeration device that can reduce the flow stroke of the foaming material, improve the state at the end of the flow stroke of the foaming material, and avoid the problem of material void, so as to ensure the stable product quality of the box body structure and avoid the deterioration of product performance.

[0006] To solve the above technical problems, this application adopts the following technical solutions:

[0007] According to one aspect of this application, this application provides a box body structure of a refrigeration device, which includes: an outer shell, an inner liner, and a foaming space; a back plate is formed on the back side of the outer shell; the inner liner is accommodated in the outer shell and is connected to the outer shell; the foaming space is arranged between the outer shell and the inner liner; wherein, a plurality of material injection holes for injecting the foaming material into the foaming space and a plurality of negative pressure holes for extracting the gas in the foaming space are opened on the back plate, and the plurality of material injection holes are arranged at intervals on the periphery of the back plate to communicate with the foaming space; the plurality of negative pressure holes are close to the middle of the back plate, and the plurality of negative pressure holes are arranged at intervals on the back plate to guide the end of the flow stroke of the foaming material to converge at the negative pressure holes.

[0008] The above technical solution has the following advantages or beneficial effects:

[0009] When the foaming material is injected into the foaming space through the injection hole, the negative pressure hole can be used to extract the gas in the foaming space, so as to effectively reduce the flow resistance during the foaming of the foaming material. Moreover, the negative pressure hole can also be used to evacuate the gas at the confluence of the foaming material to avoid the problem of material emptiness.

[0010] In some embodiments, a pressure regulating valve is detachably arranged on the negative pressure hole, and the pressure regulating valve can adjust the air pressure in the foaming space; a suction pipe is arranged on one side of the pressure regulating valve facing away from the box body structure, and the suction pipe is used to communicate with an external air extraction device.

[0011] The above technical solution has the following advantages or beneficial effects:

[0012] The pressure regulating valve is connected to the external air extraction device through the suction pipe, so that the pressure regulating valve can finely adjust the pressure at the negative pressure hole in the foaming space, so that the pressure regulating valve can not only reduce the flow resistance during the flow of the foaming material and improve the foaming efficiency of the foaming material, but also reduce the air extraction suction at the negative pressure hole as the foaming material gradually approaches, prevent the foaming material from entering the pressure regulating valve through the negative pressure hole, and ensure the safety and reliability of the pressure regulating valve and the suction pipe.

[0013] In some embodiments, the foaming space includes a back foaming space and a peripheral foaming space, and the peripheral foaming space extends along the periphery of the back foaming space; a plurality of the injection holes are respectively arranged relative to the corners of the peripheral foaming space.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] The injection holes are arranged at the corners of the peripheral foaming space, so that when the foaming material enters the corners of the peripheral foaming space through the injection holes, the foaming material can foam towards the two partial peripheral foaming spaces on both sides at the same time, so as to improve the foaming efficiency, and can also make the foaming material converge in the peripheral foaming space in a short time and improve the overall structural strength of the foaming material.

[0016] In some embodiments, the box body structure further includes a partition board, and the partition board divides the inner container; a partition board foaming space is arranged in the partition board, and the partition board foaming space communicates with the back foaming space and the peripheral foaming space; the injection hole is opened on the back plate at the intersection of the partition board foaming space and the peripheral foaming space.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] When the refrigerator is provided with a partition, the injection holes are arranged at the intersection of the foaming space of the partition and the peripheral foaming space, so as to effectively improve the foaming efficiency of the peripheral foaming space and the foaming space of the partition of the refrigerator, prevent the filling of the foaming material in the foaming space of the partition from being late, and avoid the problem of material shortage in the foaming space of the partition.

[0019] In some embodiments, the peripheral foaming space includes a left foaming space and a right foaming space which are oppositely arranged; a plurality of the injection holes respectively form two injection groups, and the two injection groups are respectively arranged on opposite sides of the back panel with respect to the left foaming space and the right foaming space, and the plurality of injection holes in each injection group are arranged at intervals along one side of the back panel.

[0020] The above technical solution has the following advantages or beneficial effects:

[0021] A plurality of injection holes are respectively arranged on opposite sides of the back panel. When the height of the box body structure is relatively high, the plurality of injection holes can effectively ensure the filling efficiency of the foaming material in the left foaming space and the right foaming space of the box body structure, thereby improving the overall foaming efficiency of the box body structure and reducing the foaming time.

[0022] In some embodiments, a plurality of the negative pressure holes are arranged along the arrangement direction of the plurality of injection holes in each injection group, and the two outermost negative pressure holes are close to the peripheral foaming space.

[0023] The above technical solution has the following advantages or beneficial effects:

[0024] The plurality of negative pressure holes can effectively reduce the flow resistance of the foaming material and improve the foaming efficiency. Moreover, the two outermost negative pressure holes can evacuate the air at the confluence of the peripheral foaming space and avoid the problem of material shortage at the confluence of the foaming material.

[0025] In some embodiments, a plurality of the negative pressure holes form at least two negative pressure groups, and at least two of the negative pressure groups are arranged along the arrangement direction of the two injection groups, and the plurality of negative pressure holes in each negative pressure group are arranged along the arrangement direction of the plurality of injection holes in each injection group; or a plurality of the negative pressure holes form two negative pressure groups, the plurality of negative pressure holes in one negative pressure group are arranged along the arrangement direction of the plurality of injection holes in each injection group, the plurality of negative pressure holes in the other negative pressure group are arranged along the interval direction of the two injection groups, and the arrangement directions of the two negative pressure groups intersect.

[0026] The above technical solution has the following advantages or beneficial effects:

[0027] The two negative pressure groups can effectively reduce the flow resistance of the foaming material and improve the foaming efficiency. Moreover, the negative pressure holes in the two negative pressure groups can be opened and closed according to the actual situation, so as to fully evacuate the air at the convergence of the peripheral foaming space and avoid the problem of material void at the convergence of the foaming material.

[0028] In some embodiments, a barrier net is arranged in the negative pressure hole, and the barrier net is used to block the foaming material.

[0029] The above technical solution has the following advantages or beneficial effects:

[0030] The arrangement of the barrier net can effectively prevent the foaming material from entering the pressure regulating valve or the air extraction pipe through the negative pressure hole, so as to ensure the safety of the pressure regulating valve and the air extraction pipe.

[0031] In some embodiments, the barrier net is arranged on the side of the back panel close to the inner liner.

[0032] The above technical solution has the following advantages or beneficial effects:

[0033] The barrier net is arranged on the side of the back panel close to the inner liner, so as to effectively avoid the foaming material from seeping into the pressure regulating valve and the air extraction pipe through the negative pressure hole, and further ensure the safety and reliability of the pressure regulating valve and the air extraction pipe.

[0034] In some embodiments, a plurality of micropores are formed in the barrier net, and the aperture of the micropores is 0.05 mm to 0.15 mm.

[0035] The above technical solution has the following advantages or beneficial effects:

[0036] The aperture of the micropores is 0.05 mm to 0.15 mm, so as to effectively prevent the foaming material from entering the pressure regulating valve through the barrier net while ensuring that the pressure regulating valve and the air extraction pipe extract the gas in the foaming space, thereby ensuring the safety of the pressure regulating valve.

[0037] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0038] In the present application, a box structure of a refrigeration device is provided. When the box structure is produced, a plurality of injection holes are respectively communicated with a plurality of injection guns for injecting foaming material into the foaming space. The negative pressure holes extract the gas in the foaming space. When the foaming material is injected into the foaming space through the plurality of injection holes, multiple strands of foaming material foam from the peripheral foaming space and fill the middle of the foaming space, so as to effectively improve the flow efficiency of the foaming material. While the foaming material is foaming, the negative pressure holes extract the air in the foaming space. On the one hand, it can reduce the resistance during the flow of the foaming material, and on the other hand, it can guide the foaming material to converge at the negative pressure holes at the end of the flow stroke to avoid the problem of material void, so as to ensure the stable product quality of the box structure and avoid the deterioration of product performance. Brief Description of the Drawings

[0039] Figure 1 It is a schematic structural view of the box structure of the present utility model.

[0040] Figure 2 It is a schematic structural view of one embodiment of the box structure of the present utility model.

[0041] Figure 3 It is a schematic structural view of another embodiment of the box structure of the present utility model.

[0042] Figure 4 It is a schematic structural view of two negative pressure groups arranged at intervals on the back panel of the box structure of the present utility model.

[0043] Figure 5 It is a schematic structural view of two intersecting negative pressure groups arranged on the back panel of the box structure of the present utility model.

[0044] Figure 6 It is a schematic structural view of the box structure of the present utility model during foaming.

[0045] Figure 7 is Figure 6 a cross-sectional view of the structure shown in

[0046] Description of the reference numerals is as follows: 100, outer shell; 110, back panel; 111, injection hole; 1111, first injection hole; 1112, second injection hole; 1113, third injection hole; 1114, fourth injection hole; 112, negative pressure hole; 113, pressure regulating valve; 120, left side panel; 130, right side panel; 140, top side panel; 150, bottom side panel; 160, press chamber; 200, inner tank; 300, foaming space; 310, back foaming space; 320, peripheral foaming space; 321, top foaming space; 322, left foaming space; 323, bottom foaming space; 324, right foaming space; 41, air extraction device; 42, air extraction pipe; 43, injection machine; 44, injection gun. Detailed Description of the Preferred Embodiments

[0047] Typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various variations in different embodiments, all of which do not depart from the scope of the present application, and the descriptions and illustrations therein are for illustrative purposes in nature and not intended to limit the present application.

[0048] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0049] The refrigeration equipment may include a refrigerator, a freezer, a storage cabinet, etc. Here, a refrigerator is taken as an example;

[0050] The refrigeration equipment may include a cabinet structure, a door structure and a refrigeration system. The cabinet structure is used to accommodate articles. The door structure is pivotally provided on the cabinet structure so as to facilitate the user to take and place articles. The refrigeration system is accommodated in the cabinet structure to provide cooling capacity for refrigerating or freezing articles.

[0051] Figure 1 is a schematic structural view of the cabinet structure of the present utility model.

[0052] Refer to Figure 1 , the cabinet structure may include a housing 100, an inner liner 200 and a foaming space 300. The housing 100 may include a back panel 110, a left side panel 120, a right side panel 130, a top side panel 140 and a bottom side panel 150. An inner liner 200 forms a refrigerating space for accommodating articles. The inner liner 200 is accommodated in the housing 100, and the inner liner 200 is hermetically connected to the housing 100 so that a foaming space 300 is formed between the inner liner 200 and the outside.

[0053] The foaming space 300 may include a back foaming space 310 and a peripheral foaming space 320. The back foaming space 310 is provided between the inner liner 200 and the back panel 110. The peripheral foaming space 320 is provided between the inner liner 200 and the peripheral side panels of the housing 100. The peripheral foaming space 320 extends along the periphery of the back foaming space 310, and the peripheral foaming space 320 and the back foaming space 310 are communicated with each other.

[0054] The peripheral foaming space 320 may include a top foaming space 321, a left foaming space 322, a bottom foaming space 323, and a right foaming space 324 that are sequentially connected. The top foaming space 321 is located between the top side plate 140 and the inner container 200. The left foaming space 322 is located between the left side wall and the inner container 200. The bottom foaming space 323 is located between the bottom side wall and the inner container 200. The right foaming space 324 is located between the right side wall and the inner container 200.

[0055] Figure 2 It is a schematic structural diagram of one embodiment of the box structure of the present utility model.

[0056] Refer to Figure 2 , for the convenience of understanding and description, taking the state where the box structure of the refrigeration device is placed on the working ground and the opening direction of the refrigeration compartment faces the working ground as a reference, the direction of the box structure relative to the working ground is the upper direction in the following text, and the direction away from the upper direction is the lower direction in the following text; the relative direction of the left side plate 120 and the right side plate 130 is the left and right direction in the following text; the direction perpendicular to the up and down direction and the left and right direction is the front and back direction in the following text.

[0057] Refer to Figure 1 and Figure 2 , the present application provides a box structure of a refrigeration device (hereinafter simply referred to as: box structure), which may include: an outer shell 100, an inner container 200, and a foaming space 300. A back plate 110 is formed on the back side of the outer shell 100. The inner container 200 is accommodated in the outer shell 100 and is connected to the outer shell 100. The foaming space 300 is provided between the outer shell 100 and the inner container 200. Among them, a plurality of injection holes 111 for injecting foaming material into the foaming space 300 and a plurality of negative pressure holes 112 for extracting gas in the foaming space 300 may be provided on the back plate 110. The plurality of injection holes 111 may be arranged at intervals on the periphery of the back plate 110 to communicate with the foaming space 300. The plurality of negative pressure holes 112 may be close to the middle of the back plate 110. The plurality of negative pressure holes 112 may be arranged at intervals on the back plate 110 to guide the end of the travel of the foaming material to converge at the negative pressure holes 112.

[0058] When the box structure is being produced, the staff places the box structure on the working ground so that the opening direction of the refrigeration compartment of the box structure is downward, the back plate 110 of the box structure is located above the inner container 200, the left side wall and the right side wall are arranged opposite to each other in the left and right direction, and the top side wall and the bottom side wall are arranged opposite to each other in the front and back direction.

[0059] Afterwards, a plurality of injection holes 111 are respectively communicated with a plurality of injection guns 44 for injecting foaming material into the foaming space 300. A plurality of negative pressure holes 112 are communicated with an air extraction device 41 to extract the gas in the foaming space 300 through the negative pressure holes 112. When the foaming material is injected into the foaming space 300 through the plurality of injection holes 111, multiple strands of foaming material foam from the peripheral foaming space 300 and fill to the middle of the foaming space 300, so as to effectively improve the flow efficiency of the foaming material, improve the overall foaming quality, reduce the thermal conductivity, accelerate demoulding, and reduce the injection amount of the foaming material. While the foaming material is foaming, the air extraction device 41 extracts the air in the foaming space 300 through the plurality of negative pressure holes 112.

[0060] When the negative pressure holes 112 are used to extract the air in the foaming space 300, on the one hand, it can reduce the resistance during the flow of the foaming material, improve the foaming efficiency, and thus improve the foaming quality; on the other hand, it can guide the foaming material to converge at the negative pressure holes 112 at the end of the flow stroke, so that the negative pressure holes 112 can extract the gas in the foaming space 300 at the end of the foaming material, to avoid the problem of material void, and thus can ensure the stable product quality of the box body structure and avoid the deterioration of product performance.

[0061] Refer to Figure 1 and Figure 2 In this embodiment, the foaming space 300 may include a back foaming space 310 and a peripheral foaming space 320. The peripheral foaming space 320 may include a top foaming space 321, a left foaming space 322, a bottom foaming space 323, and a right foaming space 324 that are sequentially communicated.

[0062] In this embodiment, a plurality of injection holes 111 may be formed on the back plate 110 of the box body structure. The plurality of injection holes 111 are respectively used to communicate with a plurality of injection guns 44, and the plurality of injection guns 44 are respectively connected to a plurality of injection machines 43, so that the foaming materials in the plurality of injection machines 43 are respectively injected into the foaming space 300 through the plurality of injection guns 44.

[0063] The plurality of injection holes 111 are respectively arranged on the periphery of the back plate 110, and the plurality of injection holes 111 are respectively arranged relative to the peripheral foaming space 320. Multiple strands of foaming material injected by the plurality of injection guns 44 through the plurality of injection holes 111 first flow downward into the peripheral foaming space 320, and after gradually filling the peripheral foaming space 320 from bottom to top in the peripheral foaming space 320, they are then foamed and filled into the back foaming space 310, thereby effectively reducing the problem of material void in the peripheral foaming space 320.

[0064] In one embodiment of the box body structure of the present utility model:

[0065] Refer to Figure 1 and Figure 2In this embodiment, a plurality of injection holes 111 are respectively arranged at the corners of the peripheral foaming space 320. When the injection gun 44 injects the foaming material through the plurality of injection holes 111 at the corners of the peripheral foaming space 320, the plurality of foaming materials can simultaneously foam to the peripheral foaming spaces 320 on both sides of the corner after entering the peripheral foaming space 320.

[0066] The corner is the intersection of the left foaming space 322 with the top foaming space 321 and the bottom foaming space 323 , and the right foaming space 324 is the intersection of the top foaming space 321 and the bottom foaming space 323 .

[0067] Multiple strands of foaming materials are foamed toward the peripheral foaming spaces 320 of two adjacent parts at the same time. On the one hand, this can reduce the foaming flow distance of the foaming materials so that the foaming materials can converge in a short time to ensure the uniformity of foam concentration in various places in the peripheral foaming space 320 and improve the foaming efficiency of the foaming materials. On the other hand, this can improve the structural integrity of the foaming materials at the corners of the box structure, avoid connection marks between multiple strands of foaming materials at the corners, and improve the structural strength of the box structure.

[0068] In some embodiments, the back plate 110 may be provided with a first injection hole 1111, a second injection hole 1112, a third injection hole 1113 and a fourth injection hole 1114. The first injection hole 1111 is arranged relative to the intersection of the top foaming space 321 and the left foaming space 322. The second injection hole 1112 is arranged relative to the intersection of the left foaming space 322 and the bottom foaming space 323. The third injection hole 1113 is arranged relative to the intersection of the bottom foaming space 323 and the right foaming space 324. The fourth injection hole 1114 is arranged relative to the intersection of the right foaming space 324 and the top foaming space 321.

[0069] A stream of foaming material injected through the first injection hole 1111 can simultaneously foam and fill the top foaming space 321 and the left foaming space 322; a stream of foaming material injected through the second injection hole 1112 can simultaneously foam and fill the left foaming space 322 and the bottom foaming space 323; a stream of foaming material injected through the third injection hole 1113 can simultaneously foam and fill the bottom foaming space 323 and the right foaming space 324; a stream of foaming material injected through the fourth injection hole 1114 can simultaneously foam and fill the right foaming space 324 and the top foaming space 321, thereby improving the filling efficiency of the peripheral foaming space 320 and reducing the problem of empty material in the peripheral foaming space 320.

[0070] In some embodiments, the box structure may further include a partition (not shown in the figure). The partition is used to separate the inner container 200. A partition foaming space (not shown in the figure) may be provided inside the partition. The partition foaming space communicates with the back foaming space 310 and the peripheral foaming space 320. The back plate 110 may be provided with a filling hole 111 relative to the intersection of the partition foaming space and the peripheral foaming space 320.

[0071] When a filling hole 111 is provided at the intersection of the partition foaming space and the peripheral foaming space 320, a stream of foaming material injected through the filling hole 111 can foam and simultaneously fill the partition foaming space and the peripheral foaming space 320. This can not only reduce the foaming flow travel of a single stream of foaming material, facilitate the full foaming of the single stream of foaming material, reduce the usage amount of the foaming material, and thus reduce the production cost of the box structure; but also facilitate the convergence of multiple streams of foaming material into one body within the peripheral foaming space 320 and the partition foaming space, so as to improve the foaming efficiency of the box structure and reduce the time cost.

[0072] It can be understood that: the intersection of the partition foaming space and the peripheral foaming space 320 is also the corner of the peripheral foaming space 320.

[0073] In other embodiments, the box structure may further include a plurality of partitions. The plurality of partitions intersect with each other, and partition foaming spaces may be provided inside all of the plurality of partitions. The back plate 110 may be provided with a filling hole 111 relative to the intersection of the partition foaming space and the peripheral foaming space 320, so that after the filling gun 44 injects the foaming material, the foaming material can quickly converge at the intersection of the partition foaming spaces in a short time, improving the integrity after the foaming material converges. Moreover, the foaming material converged into one body can also avoid the phenomenon of material void, ensure the overall structural strength of the box structure, ensure the stable product quality of the box structure, and avoid the deterioration of product performance.

[0074] Figure 3 It is a schematic structural diagram of another embodiment of the box structure of the present utility model.

[0075] In another embodiment of the box structure of the present utility model:

[0076] Refer to Figure 1 and Figure 3 , a plurality of filling holes 111 can respectively form two filling groups. The two filling groups can be respectively arranged on opposite sides of the back plate 110 relative to the left foaming space 322 and the right foaming space 324. The plurality of filling holes 111 in each filling group are all arranged at intervals along one side of the back plate 110.

[0077] When multiple injection guns 44 are respectively connected to multiple injection holes 111 in the two injection groups, the multiple injection guns 44 can simultaneously inject multiple strands of foaming material into the left foaming space 322 and the right foaming space 324, and enable the foaming material to foam and fill into the top foaming space 321 and the bottom foaming space 323, so that the multiple strands of foaming material converge into one body in the top foaming space 321 and the bottom foaming space 323, thereby ensuring the structural strength of the box structure.

[0078] In some other embodiments, a press machine chamber 160 is provided at the bottom of the box body, and the press machine chamber 160 is used to accommodate part of the refrigeration system. The bottom foaming space 323 extends along the inner side wall of the press machine chamber 160, so that the bottom foaming space 323 is in a stepped shape.

[0079] The two injection groups are respectively arranged relative to the left foaming space 322 and the right foaming space 324, so that after the foaming material enters the left foaming space 300 and the right foaming space 324, the foaming material can flow and fill towards the top foaming space 321 and the stepped bottom foaming space 323, and converge in the top foaming space 321 and the bottom foaming space 323, thereby avoiding the phenomenon of material void at the top foaming space 321 and the bottom foaming space 323.

[0080] In some other embodiments, the two injection groups can respectively include two injection holes 111. The two injection holes 111 in one injection group are respectively arranged at the intersections of the left foaming space 322 with the top foaming space 321 and the bottom foaming space 323; the two injection holes 111 in the other injection group are respectively arranged at the intersections of the right foaming space 324 with the top foaming space 321 and the bottom foaming space 323, so that the foaming material can simultaneously foam and extend towards the adjacent circumferential foaming spaces 320 on both sides, thereby reducing the moving distance of the foaming material, and also ensuring uniform foaming of the foaming material in the circumferential foaming space 320 and avoiding the problem of material void.

[0081] In some other embodiments, when the lengths of the left foaming space 322 and the right foaming space 324 of the box body structure are relatively long, the two injection groups can respectively include three injection holes 111. The two injection holes 111 in one injection group can be respectively arranged at the intersections of the left foaming space 322 with the top foaming space 321 and the bottom foaming space 323, and the other injection hole 111 can be arranged in the middle of the left foaming space 322 to improve the foaming efficiency of the foaming material in the left foaming space 322.

[0082] Figure 4 It is a schematic structural diagram of two negative pressure groups arranged at intervals on the back panel of the box body structure of the present utility model. Figure 5 It is a schematic structural diagram of two intersecting negative pressure groups on the back panel of the box body structure of the present utility model. Figure 6It is a schematic structural view of the box structure of the present utility model during foaming. Figure 7 is Figure 6 a cross-sectional view of the structure shown in

[0083] Referring to Figures 1 to 7 , in this embodiment, a plurality of negative pressure holes 112 can be formed on the back plate 110 of the box structure. The negative pressure holes 112 are used to communicate with an external air extraction device 41 to extract the gas in the foaming space 300, so as to reduce the flow resistance when the foaming material flows in the foaming space 300, improve the fluidity of the foaming material, reduce the injection amount, and improve the overall filling effect of the foaming material.

[0084] Moreover, when the foaming material foams from the peripheral foaming space 320 and fills the back foaming space 310, the foaming material flows from the periphery of the back foaming space 310 towards the middle of the back foaming space 310. The plurality of negative pressure holes 112 can change the pressure of the foaming space 300 in the vicinity, so as to adjust and guide the convergence point of the foaming material and avoid the problem of material void in the box structure.

[0085] Referring to Figures 1 to 3 , Figure 6 and Figure 7 , in this embodiment, the plurality of negative pressure holes 112 can be located in the middle of the back plate 110. The plurality of negative pressure holes 112 can be arranged along the arrangement direction of the plurality of injection holes 111 in the injection group.

[0086] When the foaming material fills the back foaming space 310 from the peripheral foaming space 320, the foaming material filled in the peripheral foaming space 320 extends towards the middle of the back foaming space 310. Moreover, when the foaming material foams and flows from the outside of the peripheral foaming space 320 towards the middle of the peripheral foaming space 320, the foaming material sequentially covers the outer negative pressure holes 112 and finally converges at the negative pressure holes 112 in the middle of the back plate 110, so that all the gas in the foaming space 300 is pumped out to the outside, avoiding the problem of material void in the back foaming space 310 and improving the structural strength of the box structure.

[0087] In some embodiments, the two outermost negative pressure holes 112 are close to the peripheral foaming space 320, so as to guide the foaming material at the corner to foam and converge at the outermost negative pressure hole 112 of the back foaming space 310, thereby avoiding the problem of material void in the peripheral foaming space 320.

[0088] Referring to Figure 4 , in some embodiments, the plurality of negative pressure holes 112 can form at least two negative pressure groups. The at least two negative pressure groups are arranged along the arrangement direction of the two injection groups. The plurality of negative pressure holes 112 in the negative pressure group are arranged along the arrangement direction of the plurality of injection holes 111 in the injection group.

[0089] The two negative pressure groups are arranged at intervals. The multiple negative pressure holes 112 in the two negative pressure groups can evacuate the air in the foaming space 300 to reduce the flow resistance of the foaming material. Moreover, the multiple negative pressure holes 112 in the two negative pressure groups can be switched on and off in sequence to evacuate the gas in the foaming space 300 and avoid the problem of material shortage.

[0090] In some other embodiments, at least two negative pressure groups are arranged at intervals in the left - right direction. The multiple negative pressure holes 112 in the negative pressure group are arranged at intervals in the front - back direction.

[0091] Refer to Figure 5 , in some embodiments, the multiple negative pressure holes 112 can form two negative pressure groups. The multiple negative pressure holes 112 in one negative pressure group are arranged along the arrangement direction of the multiple injection holes 111 in the injection group, and the multiple negative pressure holes 112 in the other negative pressure group are arranged along the interval direction between the two injection groups, and the arrangement directions of the two negative pressure groups intersect.

[0092] The outermost negative pressure holes 112 in the two negative pressure groups can evacuate the gas in the peripheral foaming space 320 respectively to guide the flow of the foaming material. When the foaming material at the corner converges in the middle of the left foaming space 322, the right foaming space 324, the top foaming space 321 and the bottom foaming space 323, the outermost negative pressure holes 112 can evacuate the air at the convergence position, thus effectively avoiding the problem of material shortage at the convergence position.

[0093] In some other embodiments, the multiple negative pressure holes 112 in one negative pressure group can be arranged at intervals in the front - back direction, and the multiple negative pressure holes 112 in the other negative pressure group can be arranged at intervals in the left - right direction.

[0094] Refer to Figure 5 , in some other embodiments, the straight lines where the multiple negative pressure holes 112 in the two negative pressure groups are located can intersect at the middle part of the back plate 110, and a negative pressure hole 112 is arranged at the intersection to enable the foaming material in the back foaming space 310 to finally converge at the middle part of the back foaming material, thereby evacuating the gas at the final convergence position of the foaming material to avoid the problem of material shortage in the back foaming space 310.

[0095] In some embodiments, due to the different internal structures of various box structures, problems such as material blocking by various components and poor filling of the foaming material due to narrow foaming channels are likely to occur in the box structure, thus easily resulting in problems of unstable quality or deteriorated performance. At this time, the installation positions and forms of the two negative pressure groups can be selected according to the internal structure of the box structure to bypass obstacles, pass through narrow channels, improve the foaming efficiency of the box structure, improve the foaming quality, avoid the problem of material shortage, and moreover, can also reduce the thermal conductivity, accelerate demoulding, and reduce the injection volume.

[0096] Refer to Figure 6 and Figure 7, in this embodiment, a pressure regulating valve 113 is detachably provided on the negative pressure hole 112. The pressure regulating valve 113 is attached to the outer side of the back plate 110 and is sealingly connected to the negative pressure hole 112. The pressure regulating valve 113 can regulate the air pressure in the foaming space 300. A suction pipe 42 is provided on the side of the pressure regulating valve 113 facing away from the box body structure, and the suction pipe 42 is used to connect to an external air extraction device 41.

[0097] When the injection gun 44 injects the foaming material into the foaming space 300 through the injection hole 111, the external air extraction device 41 can extract the gas in the foaming space 300 through the pressure regulating valve 113, thereby reducing the flow resistance of the foaming material, reducing the injection amount, improving the overall filling effect of the foaming material, and also being able to extract the gas at the converging place of the foaming material to avoid the problem of material void in the foaming space 300.

[0098] In some embodiments, the pressure regulating valve 113 can regulate the pressure at the negative pressure hole 112 of the foaming space 300 to facilitate the extraction of the gas in the foaming space 300, so that the foaming material converges at the negative pressure hole 112 and can prevent the foaming material from entering the pressure regulating valve 113 to damage the pressure regulating valve 113.

[0099] When the foaming material is far from the negative pressure hole 112, the pressure regulating valve 113 regulates the negative pressure suction at the negative pressure hole 112 to be able to efficiently extract the gas in the foaming space 300, thereby reducing the flow resistance of the foaming material.

[0100] When the foaming material gradually approaches the negative pressure hole 112, the pressure regulating valve 113 is adjusted to gradually reduce the air extraction suction at the negative pressure hole 112, so as to avoid the problem of material void while preventing the foaming material from flowing into the pressure regulating valve 113 through the negative pressure hole 112 when the foaming material converges at the negative pressure hole 112.

[0101] In other embodiments, since the foaming material flows from the periphery of the back foaming space 310 towards the middle of the back foaming space 310, the negative pressure of the plurality of negative pressure holes 112 gradually decreases from the outside to the inside, so that the foaming material finally converges at the middle of the back plate 110, so that the gas in the foaming space 300 can be fully extracted through the negative pressure holes 112 to avoid the problem of material void.

[0102] In some embodiments, the distance between any two adjacent negative pressure holes 112 is 10 cm to 50 cm, so as to be able to fully extract the gas in the foaming space 300 and avoid the problem of material void in the foaming space 300.

[0103] Refer to Figure 6 and Figure 7, in this embodiment, a barrier net (not shown in the figure) may be provided in the negative pressure hole 112. The barrier net is used to block the foaming material. When the foaming material converges at the negative pressure hole 112, the barrier net can block the foaming material, so that the pressure regulating valve 113 can gradually reduce the negative pressure at the negative pressure hole 112 and finally stop pumping air, thereby preventing the foaming material from flowing out of the negative pressure hole 112 through the barrier net and preventing the foaming material from infiltrating into the pressure regulating valve 113, ensuring the safety of the pressure regulating valve 113 and facilitating the disassembly of the pressure regulating valve 113.

[0104] In some embodiments, the barrier net may be provided on the side of the back plate 110 close to the inner container 200. The barrier net and the pressure regulating valve 113 are arranged at intervals. When some of the foaming material passes through the barrier net, the foaming material is still far from the pressure regulating valve 113 to ensure the safety of the pressure regulating valve 113.

[0105] In some embodiments, a plurality of micropores may be formed in the barrier net. The aperture of the micropores may be 0.05 mm to 0.15 mm, so that the foaming material can only slightly protrude from the barrier net, preventing the foaming material from filling the negative pressure hole 112 and flowing onto the pressure regulating valve 113.

[0106] Refer to Figures 1 to 7 , in the present application, a box structure of a refrigeration device is provided. When the box structure is produced, the box structure is placed on the working ground so that the back plate 110 of the box structure faces upward and the opening direction of the refrigeration compartment faces downward.

[0107] Then, a plurality of injection guns 44 are respectively connected to a plurality of injection holes 111 for injecting foaming material into the foaming space 300. The air extraction device 41 is connected to the pressure regulating valve 113 of the negative pressure hole 112 for extracting the gas in the foaming space 300.

[0108] When the injection gun 44 injects the foaming material into the foaming space 300 through a plurality of injection holes 111, multiple strands of foaming material flow from the injection holes 111 through the back foaming space 310 to the corners of the peripheral foaming space 320. When the foaming material drops to the bottom of the peripheral foaming space 320, the foaming material foams from the corners of the peripheral foaming space 320 to foam and fill the parts of the peripheral foaming space 320 adjacent to both sides at the same time. And finally converge in the middle of the left foaming space 322, the top foaming space 321, the right foaming space 324 and the bottom foaming space 323. When the peripheral foaming space 320 is filled with the foaming material, the foaming material fills from the periphery of the back foaming space 310 to the middle of the back foaming space 310 to improve the processing efficiency of the box structure.

[0109] When the foaming material is injected by the injection gun 44 and the foaming material foams, the air extraction device 41 extracts the gas in the foaming space 300 through the pressure regulating valve 113. On the one hand, it can reduce the flow resistance of the foaming space 300. On the other hand, it can guide the flow direction of the foaming material so that the convergence point of the foaming material is close to the negative pressure hole 112, so that the negative pressure hole 112 can fully extract the gas in the foaming space 300, avoiding the problem of material emptiness, thus ensuring the stable product quality of the box structure and preventing the deterioration of product performance.

[0110] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be embodied in many forms without departing from the spirit or essence of the utility model, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. The box structure of a refrigeration device, characterized in that, include: The housing has a back plate formed on its back side; An inner container is accommodated in the outer shell and connected to the outer shell; A foaming space, which is arranged between the outer shell and the inner container; The back plate is provided with a plurality of injection holes for injecting foaming material into the foaming space and a plurality of negative pressure holes for extracting gas in the foaming space, and the plurality of injection holes are arranged at intervals on the peripheral side of the back plate to connect the foaming space; The plurality of negative pressure holes are close to the middle of the back plate, and the plurality of negative pressure holes are arranged at intervals on the back plate to guide the end of the travel of the foaming material to converge at the negative pressure holes.

2. The cabinet structure according to claim 1, wherein, A pressure regulating valve is detachably provided on the negative pressure hole, and the pressure regulating valve can adjust the air pressure in the foaming space; an exhaust pipe is provided on the side of the pressure regulating valve away from the box structure, and the exhaust pipe is used to connect to an external exhaust device.

3. The box structure according to claim 1, characterized in that The foaming space includes a back foaming space and a peripheral foaming space, and the peripheral foaming space extends along the peripheral side of the back foaming space; The plurality of injection holes are respectively arranged at corners of the peripheral foaming space.

4. The box body structure according to claim 3, wherein The box structure further includes a partition, which separates the inner container; a partition foaming space is provided in the partition, and the partition foaming space is connected to the back foaming space and the peripheral foaming space; The injection hole is provided at the intersection of the back plate relative to the partition foaming space and the peripheral foaming space.

5. The box structure according to claim 3, characterized in that The peripheral foaming space includes a left foaming space and a right foaming space which are arranged opposite to each other; The plurality of injection holes respectively form two injection groups, and the two injection groups are respectively arranged on opposite sides of the back plate relative to the left foaming space and the right foaming space, and the plurality of injection holes in the injection groups are arranged at intervals along one side of the back plate.

6. The box structure according to claim 5, characterized in that, The plurality of negative pressure holes are arranged along the arrangement direction of the plurality of injection holes in the injection group, and the two outermost negative pressure holes are close to the peripheral foaming space.

7. The box structure according to claim 5, characterized in that, The plurality of negative pressure holes form at least two negative pressure groups, at least two of the negative pressure groups are arranged along the arrangement direction of the two injection groups, and the plurality of negative pressure holes in the negative pressure group are arranged along the arrangement direction of the plurality of injection holes in the injection group; or The multiple negative pressure holes form two negative pressure groups, the multiple negative pressure holes in one negative pressure group are arranged along the arrangement direction of the multiple injection holes in the injection group, and the multiple negative pressure holes in the other negative pressure group are arranged along the spacing direction of the two injection groups, and the arrangement directions of the two negative pressure groups intersect.

8. The box body structure according to claim 1, wherein, A barrier net is arranged in the negative pressure hole, and the barrier net is used to block the foaming material.

9. The box structure according to claim 8, characterized in that, The barrier net is arranged on a side of the back plate close to the inner container.

10. The box structure according to claim 8, wherein, The barrier net is provided with a plurality of micropores, and the pore diameter of the micropores is 0.05 mm to 0.15 mm.

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