Corner connecting structure for air handling unit housing, and air handling unit housing

Abstract

The present disclosure relates to a corner connecting structure for an air handling unit housing, and an air handling unit housing. The corner connecting structure (100) is used for connecting two mutually perpendicular insulation boards (200) when an air handling unit housing is assembled, so as to form two mutually perpendicular surfaces of the air handling unit housing. The corner connecting structure (100) comprises a first profile frame (2), a second profile frame (3), and a profile corner assembling member (1) connecting the first profile frame (2) and the second profile frame (3); the profile corner assembling member (1) comprises a first snap-fitting member (11) and a second snap-fitting member (12); the first snap-fitting member (11) and the second snap-fitting member (12) are respectively connected to the first profile frame (2) and the second profile frame (3); and the first profile frame (2) and the second profile frame (3) are connected to form a structure in which the first profile frame (2) and the second profile frame (3) are mutually perpendicular.

Description

An air conditioning box body corner connection structure and air conditioning box body

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number 202323642129.6 and invention name “A corner connection structure of an air-conditioning box body and an air-conditioning box body”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the technical field of the heating, ventilation and refrigeration industry, and in particular to an air-conditioning box body corner connection structure and an air-conditioning box body. Background Art

[0004] This section provides background information related to the present application which does not necessarily constitute prior art.

[0005] Large industrial air-conditioning boxes used in the food, medicine, electronics and other industries are combined air handling units that can realize cooling, heating, humidification and so on.

[0006] The frame of an air conditioner is typically made of metal. To prevent energy loss within the unit and the resulting condensation and dripping on the unit or the housing, which can waste energy and damage the equipment, the unit must have good insulation. Conventional insulation typically uses foam board. This board is typically foamed after joining profiles together in the factory. After foaming, it is transported along with the assembled profiles to the installation site for assembly. This process is complex and carries high transportation costs. Summary of the Invention

[0007] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0008] An object of the present disclosure is to provide an air-conditioning box body corner connection structure capable of connecting an insulation board at an installation site, and an air-conditioning box body including the corner connection structure.

[0009] According to one aspect of the present disclosure, a corner connection structure for an air conditioning box body is provided. The corner connection structure is used to connect two mutually perpendicular insulation panels when assembling the air conditioning box body, forming two mutually perpendicular surfaces of the air conditioning box body. The corner connection structure includes a first profile frame and a second profile frame, and a profile corner piece connecting the first profile frame and the second profile frame. The profile corner piece includes a first clamping piece and a second clamping piece, which are respectively connected to the first profile frame and the second profile frame to connect the first profile frame and the second profile frame into a mutually perpendicular structure.

[0010] In some examples according to the present disclosure, the first clamping member and the second clamping member share a central side plate and are symmetrically arranged about the central side plate.

[0011] In some examples according to the present disclosure, the profile angle piece also includes a first connecting plate and a second connecting plate symmetrically arranged about the central side panel and perpendicular to each other, and the first connecting plate and the second connecting plate are provided with a plurality of first threaded holes perpendicular to the plate surface at a certain interval.

[0012] In some examples according to the present disclosure, the first profile frame includes a first side panel, a first groove is provided on the first side panel, the shape of the first groove corresponds to the shape of the first clip, and the first clip is clipped into the first groove.

[0013] In some examples according to the present disclosure, the first profile frame also includes a second side panel connected to the first side panel, the second side panel is parallel to the first connecting panel, and the second side panel is provided with a second threaded hole at a position corresponding to the first threaded hole on the first connecting panel.

[0014] In some examples according to the present disclosure, the first profile frame also includes a third side panel connected to the first side panel and perpendicular to the second side panel, the third side panel is located inside the air-conditioning box body, and a second protrusion is provided on a side of the third side panel away from the inside of the air-conditioning box body, the second protrusion is located at the end of the third side panel away from the first side panel and contacts the insulation board.

[0015] In some examples according to the present disclosure, the first profile frame also includes a fourth side panel perpendicular to the third side panel, and the fourth side panel is provided with a first clip groove on a side facing the insulation panel, and a first sealing strip is installed between the fourth side panel and the insulation panel, and the first sealing strip is provided with a clip joint, which is clipped into the first clip groove.

[0016] In some examples according to the present disclosure, a third protrusion is provided on a side of the fourth side plate away from the insulation plate, and a first protrusion is provided on the third side plate at a position opposite to the third protrusion, and the first protrusion and the third protrusion together form a second clamping groove.

[0017] In some examples according to the present disclosure, the first profile frame also includes a fifth side panel whose ends are respectively connected to the end of the second side panel and the end of the fourth side panel, and the fifth side panel is provided with at least one first clamping member on the surface facing the outside of the air-conditioning box body.

[0018] In some examples according to the present disclosure, the corner connection structure further includes a first profile outer panel and a second profile outer panel that are symmetrically arranged, and the first profile outer panel and the second profile outer panel are respectively connected to the first profile frame and the second profile frame.

[0019] In some examples according to the present disclosure, the first profile outer panel is arranged parallel to the fifth side panel, a portion of the first profile outer panel is directly in contact with the insulation board, and clamps the insulation board together with the third side panel, and at least one second clamping member is provided on the surface of the first profile outer panel opposite to the fifth side panel at a position corresponding to the first clamping member, and the first clamping member and the second clamping member are used to clamp the thermal insulation strip.

[0020] In some examples according to the present disclosure, the corner connection structure further includes a corner cover, which connects the first profile outer panel and the second profile outer panel.

[0021] According to another aspect of the present disclosure, an air conditioning box body is provided, which includes a thermal insulation board, wherein two thermal insulation boards perpendicular to each other are connected by the corner connection structure according to the above technical solution.

[0022] In some examples according to the present disclosure, the air conditioning box body further includes an intermediate connecting structure, and the intermediate connecting structure can connect two coplanar insulation boards.

[0023] In some examples according to the present disclosure, the intermediate connection structure includes a profile middle mullion and a third profile outer plate, wherein the profile middle mullion and the third profile outer plate form two opposite recesses for connecting two coplanar insulation panels.

[0024] In some examples according to the present disclosure, the profile middle bar includes a sixth side panel, which is located inside the air-conditioning box body. The sixth side panel is provided with fourth protrusions at both ends of a side away from the inside of the air-conditioning box body. The fourth protrusions are directly in contact with the insulation board, and the fourth protrusions cooperate with the third profile outer panel to clamp the insulation board between the fourth protrusions and the third profile outer panel.

[0025] In some examples according to the present disclosure, the profile stile further includes a seventh side panel and an eighth side panel that are relatively parallel and perpendicular to the sixth side panel, and the seventh side panel and the eighth side panel are symmetrical in structure.

[0026] In some examples according to the present disclosure, the seventh side panel is provided with a third snap-fitting groove at an appropriate position on a side away from the eighth side panel, and the third snap-fitting groove can fix the fourth sealing strip provided between the seventh side panel and the insulation panel.

[0027] In some examples according to the present disclosure, a connection portion having a cross section that is at least partially circular is provided on a surface of the seventh side plate that faces the eighth side plate.

[0028] In some examples according to the present disclosure, the profile muntin further includes a ninth side panel parallel to the sixth side panel, and at least one third clamping member is provided on the ninth side panel on a surface of the ninth side panel facing the outside of the air conditioning box body.

[0029] In some examples according to the present disclosure, at least one fourth clamping member corresponding to the third clamping member is provided on a surface of the third profile outer panel facing the interior of the air-conditioning box.

[0030] According to the air conditioning box body corner connection structure and the air conditioning box body disclosed in the present invention, at least the following beneficial effects can be achieved:

[0031] According to the corner connection structure of the air-conditioning box disclosed in the present invention, the finished insulation board can be directly connected to the finished insulation board. When the air-conditioning box body is assembled, the finished insulation board can be cut according to the required size at the installation site, and then the cut insulation board is spliced ​​with the profile frame and the profile outer panel of the corner connection structure. The spliced ​​insulation boards are connected by the profile corner pieces to form different surfaces of the box body. The process is simple and the cost is low; and the corner connection structure is connected by mutual clamping of the connecting parts, which is convenient for positioning and assembly during installation. After the clamping is completed, it is fixed with screws to further improve the stability and reliability of the connection; in addition, the present invention adopts the form of connecting the profile outer panel and the profile frame with the insulation strip as the cold-breaking bridge. The insulation strip is made of nylon material. The nylon insulation strip realizes a larger spacing distance between the profile frame and the profile outer panel, and the insulation effect is good.

[0032] The above and other objects, features and advantages of the present disclosure will be more fully understood from the detailed description given hereinafter and the accompanying drawings, which are given by way of illustration only and thus are not to be considered as limiting the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The features and advantages of one or more embodiments of the present disclosure will become more readily understood through the following description with reference to the accompanying drawings, in which:

[0034] FIG1 is a perspective view of an air-conditioning box body corner connection structure connected to an insulation board according to an embodiment of the present disclosure;

[0035] FIG2 is a front view of the corner connection structure connected to the insulation board;

[0036] FIG3 is a front view of a profile angle piece;

[0037] FIG4 is a front view of the first profile frame;

[0038] FIG5 is a front view of the first profile outer plate;

[0039] Figure 6 is a front view of the corner cover;

[0040] FIG7 is a perspective view of an air conditioning box body according to an embodiment of the present disclosure;

[0041] FIG8 is a front view of the intermediate connecting structure connected to the insulation board;

[0042] FIG9 is a front view of the middle stile of the profile;

[0043] FIG10 is a front view of the outer plate of the third profile;

[0044] FIG11 is a schematic diagram showing the connection between the corner connection structure and the middle connection structure. DETAILED DESCRIPTION

[0045] The present disclosure will be described in detail below by way of exemplary embodiments with reference to the accompanying drawings. In several figures, similar reference numerals represent similar parts and assemblies. The following detailed description of the present disclosure is for illustrative purposes only and is by no means a limitation of the present disclosure and its applications or uses. The embodiments described in this specification are not exhaustive and are merely some of a plurality of possible embodiments. The exemplary embodiments can be implemented in many different forms and should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known technologies may not be described in detail.

[0046] Figure 1 illustrates an example of an air conditioning box body corner connection structure 100 connecting two mutually perpendicular insulation boards 200. The corner connection structure 100 is designed to connect two mutually perpendicular insulation boards 200 when assembling the air conditioning box body, forming two mutually perpendicular surfaces of the air conditioning box body.

[0047] As shown in Figure 2, the corner connection structure 100 includes a first profile frame 2 and a second profile frame 3 that are symmetrical to each other, and a profile corner piece 1 that connects the two profile frames. Each profile frame is connected to the insulation board 200 on one side and to the profile corner piece 1 on the other side. The profile corner piece 1 connects the two profile frames into a roughly vertical structure, so that the two profile frames connected to the insulation board 200 form two mutually perpendicular surfaces of the air conditioner body.

[0048] As shown in Figure 3, the profile corner fitting 1 has an axisymmetric structure and includes a first clip 11 and a second clip 12 with a generally diamond-shaped cross-section. The first clip 11 and the second clip 12 share a central side panel 121, making the first clip 11 and the second clip 12 symmetrical about the central side panel 121. The profile corner fitting 1 also includes a first connecting plate 13 and a second connecting plate 14, respectively, which are approximately perpendicular to the two side panels adjacent to the central side panel 121. The first connecting plate 13 and the second connecting plate 14 are symmetrically arranged about the central side panel 121 and are perpendicular to each other. Each connecting plate is provided with a plurality of first threaded holes 103 perpendicular to the plate surface at regular intervals for connecting to the first profile frame 2 or the second profile frame 3.

[0049] FIG4 shows an example of a first profile frame 2 . The structure of the second profile frame 3 is symmetrical to that of the first profile frame 2 . Therefore, only the structure of the first profile frame 2 will be described in detail with reference to FIG4 .

[0050] Specifically, the first profile frame 2 includes a first side panel 21, and the first side panel 21 is provided with a first groove 211 with a cross-section that is roughly diamond-shaped and has an open side. The first groove 211 cooperates with the first clip 11 of the profile corner piece 1, so that the first clip 11 can be snapped into the first groove 211, thereby connecting the first profile frame 2 and the profile corner piece 1.

[0051] As shown in Figure 3, in a preferred embodiment of the present disclosure, a plurality of protrusions are provided on the side panels opposite to the first clamping member 11 and the second clamping member 12 and the first groove 211, and the profile corner piece 1 contacts the first profile frame 2 and / or the second profile frame 3 through the protrusions, thereby avoiding surface contact between the profile corner piece 1 and the first profile frame 2 and / or the second profile frame 3, reducing the friction between the profile corner piece 1 and the first profile frame 2 and / or the second profile frame 3, and at the same time being able to absorb certain installation errors.

[0052] A second side panel 22 and a third side panel 23, which are perpendicular to each other, are respectively connected to the two sides of the first side panel 21. As shown in FIG2 , after the first profile frame 2 and the profile angle piece 1 are connected, the second side panel 22 is parallel to the first connecting plate 13 of the profile angle piece 1 and the two are in contact with each other. Second threaded holes 221 are provided at corresponding positions on the second side panel 22, so that after the first profile frame 2 and the profile angle piece 1 are connected, the first profile frame 2 and the profile angle piece 1 can be connected using screws, thereby improving the stability and reliability of the connection between the first profile frame 2 and the profile angle piece 1.

[0053] The third side panel 23 is located within the air conditioning cabinet and parallel to the insulation panel 200. The side of the third side panel 23 facing the interior of the air conditioning cabinet is flat. The side of the third side panel 23 facing away from the interior of the air conditioning cabinet is provided with a first protrusion 231 and a second protrusion 232. The second protrusion 232 is located at the end of the third side panel 23 facing away from the first side panel 21. The second protrusion 232 directly contacts the insulation panel 200 and is configured to engage with the first profile outer panel 4 shown in Figure 5 to securely engage the insulation panel 200. The structure of the first profile outer panel 4 will be further described below.

[0054] The first profile frame 2 also includes a fourth side panel 24 perpendicular to the third side panel 23. The connection point between the fourth side panel 24 and the third side panel 23 is located between the first protrusion 231 and the second protrusion 232 and close to the first protrusion 231. The fourth side panel 24 is parallel to the protruding direction of the first protrusion 231. The third side panel 23, the fourth side panel 24, and the first profile outer panel 4 together form a recess, and the insulation board 200 is connected within the recess.

[0055] A first engaging groove 241 is provided on the fourth side panel 24 on a side facing the insulation panel 200. As shown in FIG2 , a first sealing strip 6 is installed between the fourth side panel 24 and the insulation panel 200. The first sealing strip 6 has a snap joint that snaps into the first engaging groove 241 to secure the first sealing strip 6 in place.

[0056] Furthermore, a second sealing strip 7 is installed between the insulation board 200 and the third side panel 23, and in the range between the second protrusion 232 and the fourth side panel 24. The first sealing strip 6 and the second sealing strip 7 together form a seal between the insulation board 200 and the first profile frame 2, thereby improving the overall sealing performance of the air-conditioning box body.

[0057] Furthermore, a third protrusion 242 is provided on a side of the fourth side panel 24 away from the insulation board 200. The third protrusion 242 and the first protrusion 231 together form a second snap-in groove 243. The second snap-in groove 243 is used to install a corner piece that connects the first profile frame and / or the second profile frame that are perpendicular to each other on the same insulation board. The corner piece is a conventional corner piece in this field and will not be described in detail here.

[0058] Referring to Figure 4, the first profile frame 2 also includes a fifth side panel 25 that is perpendicular to both the second side panel 22 and the fourth side panel 24. The two ends of the fifth side panel 25 are connected to one end of the second side panel 22 and one end of the fourth side panel 24, respectively. At least one first clamping member 251 is provided on the side of the fifth side panel 25 facing the outside of the air-conditioning box body. The first clamping member 251 forms a triangular shape with a small opening and a large bottom surface. As shown in Figure 2, the first clamping member 251 cooperates with the second clamping member 41 on the first profile outer panel 4 to install the thermal insulation strip 8. The two ends of the thermal insulation strip 8 have enlarged ends, forming a triangular structure, so that the two ends of the thermal insulation strip 8 can be respectively clamped in the first clamping member 251 and the second clamping member 41.

[0059] In this embodiment, the heat insulation strip 8 is made of nylon material to reduce the heat conduction between the inside and outside of the air conditioning box body, while being able to withstand a certain load. Preferably, the heat insulation strip is made of PA66GF25 nylon.

[0060] In a preferred embodiment of the present disclosure, two thermal insulation strips 8 are provided between the first profile frame 2 and the first profile outer panel 4 , and the two thermal insulation strips 8 are installed at a certain distance apart.

[0061] Referring to Figure 5 , the first profile outer panel 4 is a generally flat plate. A portion of the inner surface of the first profile outer panel 4 (the surface opposite the fifth side panel 25) abuts against the outer surface of the insulation panel 200, thereby clamping the insulation panel 200 together with the third side panel 23. At least one second clamping member 41 is provided on the inner surface of the first profile outer panel 4, opposite the fifth side panel 25. The second clamping member 41 is positioned opposite the first clamping member 251 and is used to clamp the insulation strip 8. The outer surface of the first profile outer panel 4 is also provided with a strip-shaped cutout 42 having a certain depth along the thickness direction of the first profile at the end facing away from the insulation panel 200. This strip-shaped cutout 42 is used to mate with the corner cover 10, which will be described in further detail below.

[0062] Similarly, the corner connection structure 100 of this embodiment is further provided with a second profile outer panel 5 . The structure and function of the second profile outer panel 5 are similar to those of the first profile outer panel 4 , and are not described in detail here.

[0063] As shown in Figures 2 and 6, the corner connection structure 100 of this embodiment further includes a corner cover 10, which comprises two mutually perpendicular side panels with a circular transition. The thickness of the side panels is the same as the depth of the strip cutout 42. The two side panels of the corner cover 10 are respectively connected to the first profile outer panel 4 and the second profile outer panel 5 and are located within the strip cutout 42, so that the first profile outer panel 4 / the second profile outer panel 5 and the side panels of the corner cover 10 form a flat surface.

[0064] Furthermore, the inner sides of the two side panels of the corner cover 10 are respectively provided with a first hook-shaped member 101 and a second hook-shaped member 102, which respectively hook the ends of the first profile outer panel 4 and the second profile outer panel 5, thereby connecting the corner cover 10 with the first profile outer panel 4 and / or the second profile outer panel 5.

[0065] Referring to Figure 2, the corner connection structure 100 also includes a third sealing strip 9, which is located between the first side panel 21 of the first profile frame 2 and the first side panel of the second profile frame 3. The setting of the third sealing strip 9 increases the sealing performance of the corner connection structure 100. At the same time, it avoids direct contact between the first profile frame 2 and the second profile frame 3, reduces mutual friction between the two, and improves the service life of the corner connection structure 100.

[0066] The corner connection structure disclosed herein is connected by mutually snapping together the connecting parts, which facilitates positioning and assembly during installation. After the snapping is completed, screws are used to fix it, further improving the stability and reliability of the connection.

[0067] Figure 7 depicts an example of an air conditioning cabinet, which includes insulation panels 200. Two perpendicular insulation panels 200 are connected using the corner connection structure 100 described in the above embodiment. The insulation panels 200 of the air conditioning cabinet of the disclosed embodiment can be made of pre-made foam board, rock wool board, or other insulation board materials, which can be cut and assembled on-site to actual dimensions, resulting in a simple and low-cost installation process.

[0068] As shown in Figure 7, for an air-conditioning box body with a larger size, the air-conditioning box body also includes an intermediate connecting structure 400, which is used to connect two coplanar insulation boards 200, thereby forming an air-conditioning box body with larger side panels and / or top panels and / or bottom panels.

[0069] As shown in Figure 8, the intermediate connection structure 400 includes a profile middle stile 50 and a third profile outer plate 60. The intermediate connection structure 400 composed of the profile middle stile 50 and the third profile outer plate 60 can connect two coplanar insulation boards 200.

[0070] Specifically, as shown in Figure 9, the profiled muntin 50 includes a sixth side panel 51, a seventh side panel 52, an eighth side panel 53, and a ninth side panel 54. The sixth side panel 51 is positioned within the air conditioning unit body. The side of the sixth side panel 51 facing the interior of the air conditioning unit body is substantially flat. Fourth protrusions 511 are provided at both ends of the side of the sixth side panel 51 facing away from the interior of the air conditioning unit body. The fourth protrusions 511 directly contact the insulation board 200 and cooperate with the third profiled outer panel 60 to clamp the insulation board 200 between the fourth protrusions 511 and the third profiled outer panel 60.

[0071] The seventh side panel 52 and the eighth side panel 53 are arranged parallel to each other and perpendicular to the sixth side panel 51. The connection points between the seventh side panel 52 and the eighth side panel 53 and the sixth side panel 51 are located between the two fourth protrusions 511 of the sixth side panel 51. The structures of the seventh side panel 52 and the eighth side panel 53 are symmetrical, and therefore, only the structure of the seventh side panel 52 is described in detail below.

[0072] The seventh side panel 52 is provided with a third engaging groove 521 at an appropriate position on a side facing away from the eighth side panel 53. This groove 521, like the first engaging groove 241, serves to secure the fourth sealing strip 70 disposed between the seventh side panel 52 and the insulation panel 200. The structure and function of the fourth sealing strip 70 are similar to those of the first sealing strip 6 and are not further described here. Furthermore, a fifth sealing strip 80 is installed between the insulation panel 200 and the sixth side panel 51, within the region between the fourth protrusion 511 and the seventh side panel 52. The structure and function of the fifth sealing strip 80 are similar to those of the second sealing strip 7 and are not further described here.

[0073] Furthermore, as shown in FIG9 , a connecting portion 522 having a cross section of at least a partially circular ring is provided on one side of the seventh side panel 52 facing the eighth side panel 53 for connecting to the corner connecting structure 100 . The specific connection method will be further described below.

[0074] The ninth side panel 54 is substantially parallel to the sixth side panel 51, with its ends connected to one end of the seventh side panel 52 and one end of the eighth side panel 53, respectively. At least one third clamping member 541 is provided on the side of the ninth side panel 54 facing the exterior of the air conditioning box. The structure of the third clamping member 541 is similar to that of the first clamping member 251. As shown in FIG8 , the third clamping member 541 cooperates with the fourth clamping member 61 on the third profile outer panel 60 to install the thermal insulation strip 8. As shown in FIG10 , the third profile outer panel 60 is a plate-like member having at least one fourth clamping member 61 provided on the side facing the interior of the air conditioning box.

[0075] In a preferred embodiment of the present disclosure, two thermal insulation strips 8 are provided between the profile middle stile 50 and the third profile outer plate 60 , and the two thermal insulation strips 8 are installed at a certain distance apart.

[0076] Figure 11 shows a schematic diagram of the connection between the corner connection structure 100 and the intermediate connection structure 400. At the joint between the intermediate connection structure 400 and the corner connection structure 100, screws are used to connect the corner connection structure 100 and the intermediate connection structure 400. The screws connect the connection portion 522 of the corner connection structure 100 and the intermediate connection structure 400.

[0077] Compared to the prior art, the disclosed air conditioning cabinet assembly can be assembled by cutting the insulation panels to the required size at the installation site. The cut insulation panels are then spliced ​​with the profile frame and profile outer panel of the corner connection structure. The spliced ​​insulation panels are connected via profile corner pieces to form different cabinet surfaces. This simplifies the process and reduces costs. Furthermore, the disclosed invention utilizes a thermal insulation strip 8 connecting the profile outer panel and the profile frame as a cold-break bridge. The thermal insulation strip is made of nylon, which provides a larger spacing distance between the profile frame and the profile outer panel, resulting in a good thermal insulation effect.

[0078] Although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the specific embodiments described and illustrated in detail herein. Those skilled in the art may make various modifications to the exemplary embodiments without departing from the scope defined by the claims. Features from various embodiments may be combined with one another where not inconsistent. Alternatively, certain features from an embodiment may be omitted.

Claims

1. An air-conditioning box body corner connection structure, the corner connection structure (100) is used to connect two mutually perpendicular heat-insulating plates (200) when assembling the air-conditioning box body, so as to form two mutually perpendicular surfaces of the air-conditioning box body; characterized in that, The corner connection structure (100) includes a first profile frame (2) and a second profile frame (3), as well as a profile corner piece (1) connecting the first profile frame (2) and the second profile frame (3). The profile corner piece (1) includes a first clamping piece (11) and a second clamping piece (12). The first clamping piece (11) and the second clamping piece (12) are respectively connected to the first profile frame (2) and the second profile frame (3), connecting the first profile frame (2) and the second profile frame (3) into a mutually perpendicular structure.

2. The corner connection structure according to claim 1, wherein The first clamping piece (11) and the second clamping piece (12) share a central side plate (121) and are symmetrically arranged with respect to the central side plate (121).

3. The corner connection structure according to claim 2, characterized in that The profile corner piece (1) further includes a first connecting plate (13) and a second connecting plate (14) that are symmetrically arranged with respect to the central side plate (121) and perpendicular to each other. A plurality of first threaded holes (103) perpendicular to the plate surface are provided on the first connecting plate (13) and the second connecting plate (14) at certain intervals.

4. The corner connection structure according to claim 3, wherein The first profile frame (2) includes a first side plate (21). A first groove (211) is provided on the first side plate (21). The shape of the first groove (211) corresponds to the shape of the first clamping piece (11), and the first clamping piece (11) is clamped in the first groove (211).

5. The corner connection structure according to claim 4, characterized in that The first profile frame (2) further includes a second side plate (22) connected to the first side plate (21). The second side plate (22) is parallel to the first connecting plate (13), and a second threaded hole (221) is provided at a position corresponding to the first threaded hole (103) on the first connecting plate (13).

6. The corner connection structure according to claim 5, characterized in that The first profile frame (2) further includes a third side plate (23) connected to the first side plate (21) and perpendicular to the second side plate (22). The third side plate (23) is located inside the air conditioner box body. A second protrusion (232) is provided on a surface of the third side plate (23) away from the inside of the air conditioner box body. The second protrusion (232) is located at an end of the third side plate (23) away from the first side plate (21) and contacts the heat insulation board (200).

7. The corner connection structure according to claim 6, characterized in that, The first profile frame (2) further includes a fourth side plate (24) perpendicular to the third side plate (23). A first clamping groove (241) is provided on a surface of the fourth side plate (24) facing the heat insulation board (200). A first sealing strip (6) is installed between the fourth side plate (24) and the heat insulation board (200). The first sealing strip (6) is provided with a clamping head, and the clamping head is clamped in the first clamping groove (241).

8. The corner connection structure according to claim 7, characterized in that ,On the side of the fourth side plate (24) away from the heat preservation plate (200), there is a third protruding portion (242). At a position on the third side plate (23) opposite to the third protruding portion (242), there is a first protruding portion (231). The first protruding portion (231) and the third protruding portion (242) together form a second clamping groove (243).

9. The corner connection structure according to claim 8, wherein ,The first profile frame (2) further includes a fifth side plate (25) with two ends respectively connected to the ends of the second side plate (22) and the fourth side plate (24). On the side of the fifth side plate (25) facing the outside of the air conditioner box body, there is at least one first clamping member (251).

10. The corner connection structure according to claim 9, wherein ,The corner connection structure (100) further includes symmetrically arranged first profile outer plates (4) and second profile outer plates (5). The first profile outer plates (4) and the second profile outer plates (5) are respectively connected to the first profile frame (2) and the second profile frame (3).

11. The corner connection structure according to claim 10, characterized in that, The first profile outer plate (4) is arranged parallel to the fifth side plate (25). A part of the first profile outer plate (4) directly contacts the heat preservation plate (200) and, together with the third side plate (23), clamps the heat preservation plate (200). On the surface of the first profile outer plate (4) opposite to the fifth side plate (25), at a position corresponding to the first clamping member (251), there is at least one second clamping member (41). The first clamping member (251) and the second clamping member (41) are used to clamp the heat insulation strip (8).

12. The corner connection structure according to claim 10 or 11, characterized in that, The corner connection structure (100) further includes a corner cover (10). The corner cover (10) connects the first profile outer plate (4) and the second profile outer plate (5).

13. An air conditioning box body, the air conditioning box body includes a heat preservation board (200), characterized in that, Two mutually perpendicular heat preservation plates (200) are connected by using the corner connection structure (100) according to any one of claims 1 - 12.

14. The air conditioner box body according to claim 13, characterized in that, ,The air conditioner box body further includes an intermediate connection structure (400). The intermediate connection structure (400) can connect two coplanar heat preservation plates (200).

15. The air conditioner box body according to claim 14, characterized in that, ,The intermediate connection structure (400) includes a profile middle stile (50) and a third profile outer plate (60). The profile middle stile (50) and the third profile outer plate (60) form two opposite recesses for connecting two coplanar heat preservation plates (200).

16. The air conditioner box body according to claim 15, characterized in that, ,The profile middle stile (50) includes a sixth side plate (51). The sixth side plate (51) is located inside the air conditioner box body. At both ends of the side of the sixth side plate (51) away from the inside of the air conditioner box body, there are fourth protruding portions (511). The fourth protruding portions (511) directly contact the heat preservation plate (200). The fourth protruding portions (511) cooperate with the third profile outer plate (60) to clamp the heat preservation plate (200) between the fourth protruding portions (511) and the third profile outer plate (60).

17. The air conditioner box body according to claim 16, wherein, ,The profile middle stile (50) further includes a seventh side plate (52) and an eighth side plate (53) which are relatively parallel and both perpendicular to the sixth side plate (51). The structures of the seventh side plate (52) and the eighth side plate (53) are symmetrical.

18. The air conditioner box body according to claim 17, characterized in that, The seventh side plate (52) is provided with a third clamping groove (521) on a side facing away from the eighth side plate (53), and the third clamping groove (521) can fix a fourth sealing strip (70) arranged between the seventh side plate (52) and the heat preservation plate (200).

19. The air conditioner box body according to claim 17 or 18, characterized in that, The seventh side plate (52) is provided with a connecting part (522) with a cross-section of at least a partial circular ring shape on a side facing the eighth side plate (53).

20. The air conditioner box body according to any one of claims 16-18, characterized in that, The profile middle stile (50) further includes a ninth side plate (54) parallel to the sixth side plate (51), and at least one third clamping member (541) is arranged on a side of the ninth side plate (54) facing the outside of the air-conditioning box body on the ninth side plate (54).

21. The air conditioner box body according to claim 20, wherein, At least one fourth clamping member (61) corresponding to the third clamping member (541) is arranged on a side of the third profile outer plate (60) facing the inside of the air-conditioning box.

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