An air heat exchanger

Abstract

The application relates to the field of heat exchange equipment, in particular to an air heat exchanger. The air heat exchanger comprises a frame body and a heat exchange assembly arranged in the frame; the heat exchange assembly comprises a plurality of heat exchange plates which are stacked in a 90-degree staggered mode, and the plurality of heat exchange plates alternately form a transverse air duct and a longitudinal air duct; the air heat exchanger directly constructs a positioning mechanism as a supporting positioning boss and a positioning groove at the back of the boss, realizes positioning of two heat exchange plates in each region, fully utilizes the heat exchange area, and guarantees the heat exchange efficiency; and the air heat exchanger adopts an end corner connecting profile which is convenient to form and high in strength, and can guarantee the sealing property by applying relatively less sealant.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchange equipment, and in particular to an air heat exchanger. BACKGROUND

[0002] The plate heat exchanger is used for heat transfer between fluids in energy recovery and electronic cooling and preheating systems in a ventilation system. The plate heat exchanger is used in an air heat exchanger, which can be applied to a heat recovery fresh air exchanger. While ventilating and replacing air in a residence, a shopping mall, a factory, a data center and the like, the heat recovery fresh air exchanger can recover cold and heat energy and reduce air conditioning energy consumption. The air heat exchanger can also be applied to industrial equipment heat recovery and natural cooling, such as drying heat pumps, coating printing machines and the like that require a heat source and need to discharge exhaust gas, to recover heat from the exhaust gas and reduce equipment energy input.

[0003] The current air heat exchanger generally includes a frame and a heat exchange assembly (i.e., heat exchange plates stacked in the frame) arranged in the frame. For reference, a high polymer novel material plate heat exchanger disclosed in the Chinese utility model patent with publication number CN213811879U includes a plurality of first heat exchange plates and second heat exchange plates that are equal in size and identical in structure. The first heat exchange plates and the second heat exchange plates are arranged in an interlaced and stacked manner. The first heat exchange plates and the second heat exchange plates are each provided with a plurality of support and isolation blocks. The support and isolation blocks are arranged in a matrix and have gaps therebetween. The support and isolation blocks arranged on the first heat exchange plates and the second heat exchange plates are arranged in perpendicular directions. The first heat exchange plates and the second heat exchange plates are integrally injection molded from a modified PP material.

[0004] This scheme provides a buckling cap and a buckling groove on the first heat exchange plate and the second heat exchange plate, respectively, to realize the fixation and detachable connection of the two. However, this scheme connects the buckling cap and the buckling groove on the edges, which is difficult to ensure the accurate positioning of the centers of the two plates, and the buckling cap and the buckling groove need to be alternately constructed around the four sides, which occupies the space of the air duct.

[0005] Further, referring to the Chinese utility model patent text with publication number "CN210570136U", an air heat exchanger is disclosed, which comprises a frame and a plurality of longitudinal layers of heat exchange fins arranged in the frame and in the form of a polygon. The heat exchange fins form alternating cold air flow channels and hot air flow channels. In the above prior art, the end corners of the plurality of heat exchange fins are provided with a wrapping strip, the upper and lower ends of the wrapping strip are provided with elastic tongues for insertion into the insertion slots of the upper and lower sealing plates. The wrapping strip covers the corners of each heat exchange fin, and the wrapping strip and each heat exchange fin are filled with sealing glue to seal the gap formed at the corners between the two adjacent layers of heat exchange fins, preventing the airflow in the cold air flow channel from mixing with the airflow in the hot air flow channel. However, the wrapping strip in the above-mentioned scheme is only in the form of a V-shaped wrapping strip with a first side and a second side, which cannot be adapted to the end corners of the plurality of heat exchange fins, and the wrapping effect is poor. When the sealing glue is applied, the sealing glue may overflow, thereby affecting the sealing effect. Moreover, the strength of the wrapping strip is low and it is easy to be deformed by extrusion and collision. SUMMARY

[0006] To solve the above problems, the purpose of the present application is to provide an air heat exchanger which, on the one hand, directly constructs the positioning mechanism as a support positioning boss and its back positioning slot, realizing positioning of the upper and lower two heat exchange plates in each area, fully utilizing the heat exchange area and ensuring the heat exchange efficiency. On the other hand, an end corner connecting profile with convenient forming and high strength is used, and relatively less sealing glue is applied to ensure the sealing property.

[0007] To achieve the above-mentioned purposes, the present application adopts the following technical solutions:

[0008] An air heat exchanger comprises a frame and a heat exchange assembly arranged in the frame; the heat exchange assembly comprises a plurality of heat exchange plates arranged in a 90-degree staggered manner, and the heat exchange plates alternately form horizontal and vertical air ducts; the heat exchange plate comprises a square plate body, and the plate body is provided with a first folded edge folded upward on one set of opposite edges; the plate body between the two first folded edges serves as an air duct, and the other set of opposite edges of the plate body serve as the air inlet end and the air outlet end of the air duct;

[0009] A plurality of support positioning bosses are arranged in a matrix on the top surface of the plate body in the air duct and are centrally symmetric, and the support positioning bosses are constructed as streamlined bosses with the length direction extending in the direction of the air duct; the plate body is provided with a positioning slot on the back surface of the support positioning boss, and when the two heat exchange plates are arranged in a staggered manner, the support positioning boss of the lower heat exchange plate is inserted into the positioning slot of the upper heat exchange plate and is positioned;

[0010] The frame body comprises an end corner connecting profile, and the end corner connecting profile comprises a profile body, the profile body has a closed ring-shaped outer frame body, a positioning port is recessed in one end corner of the outer frame body, the inner shape of the positioning port is configured to be matched with the end corner of the heat exchange plate, and bosses for preventing the overflow of sealant are protruded outward on the outer frame body on both sides of the slot of the positioning port; the end corner of the heat exchange plate of the heat exchange assembly extends into the inner part of the positioning port of the end corner connecting profile, and sealant is applied in the inner part of the positioning port between the two bosses.

[0011] The air heat exchanger comprises a plurality of heat exchange plates which are stacked in a 90-degree staggered manner, a longitudinal air duct and a transverse air duct are formed between two adjacent heat exchange plates, and the longitudinal air duct and the transverse air duct are respectively used for feeding warm air and cold air, and heat exchange is realized based on the heat exchange plates.

[0012] In the scheme, a group of opposite edges of the heat exchange plate are configured into first folded edges, and a plurality of support positioning bosses are arranged in a matrix and are centrally symmetrical in the inner part of the air duct between the two first folded edges. When the two heat exchange plates are placed in a staggered manner, the two sides of the upper heat exchange plate are erected on the first folded edges of the two sides of the lower heat exchange plate, and the middle region is supported and positioned by the support positioning bosses, so as to ensure that the heights of the air ducts formed between the two heat exchange plates are consistent. In addition, the support positioning bosses in the scheme are configured into streamlined bosses which extend along the length direction of the air duct, so that the fluid resistance of air flowing into the air duct can be reduced.

[0013] On this basis, a positioning groove is formed on the back of each support positioning boss, and the support positioning boss of the lower heat exchange plate is clamped into the positioning groove of the upper heat exchange plate and is positioned. In this way, the support positioning boss supports the upper heat exchange plate to form the air duct, and realizes the rapid alignment and positioning of the two heat exchange plates. Compared with the prior art described in the background art, the scheme omits the snap cap and the snap groove arranged on the edge, and directly configures the positioning mechanism as the support positioning boss and the positioning groove on the back of the support positioning boss. On the one hand, the heat exchange area can be fully utilized to ensure the heat exchange efficiency. On the other hand, the upper and lower heat exchange plates are positioned in each region, the plate spacing error can be controlled, the plate gaps are uniform, and the strength of the stacked plates can be ensured.

[0014] Further, the end corner connecting profile is made by integral stretching, and has better strength than the edge covering strip. The end corner connecting profile is internally configured with a hole groove, so that a screwing component can be used to connect and fix the upper and lower sealing plates on the end part of the end corner connecting profile, so as to ensure the connection strength.

[0015] More importantly, the cross-sectional shape of the end corner connecting profile in the scheme, especially the shape inside the positioning port, can be designed based on the end corner shape of the combined heat exchange sheet, and then integrally stretched to obtain. Therefore, the end corner connecting profile in the scheme has high compatibility with the combined end corner of the heat exchange sheet, prevents local over-thickness of the glue, reduces the glue setting time, ensures the sealing performance of the glue, reduces the amount of glue used, and reduces the cost.

[0016] On this basis, the sealing glue is applied inside the positioning port, and the boss on both sides of the positioning port can place the overflow of the sealing glue, so as to seal the sealing glue inside the positioning port, so as to ensure the sealing effect of the sealing glue.

[0017] As preferred, the inner part of the outer frame is provided with a hole groove for connecting the screw part; the hole groove in the inner part of the outer frame is a hole groove with a notched side wall, and the notches of the multiple hole grooves are oriented differently. The hole groove serves as a screw mounting hole for connecting the end corner connecting profile with the upper and lower profiles, and the different orientations of the hole groove notches make the screw axis shear force tend to be uniform.

[0018] As preferred, a hole groove is respectively formed on the inner wall of the outer frame on both sides of the positioning port slot, and the boss is formed as part of the side wall of the hole groove. In this scheme, the hole groove serves as the position for tightening connection of the screw part, and also protrudes outward to form a boss, achieving two purposes at once. Moreover, after the screw part is screwed into the hole groove position, it can further press the boss outward, further improving the effect of preventing the sealing glue from overflowing.

[0019] As preferred, the outer frame is provided with an inwardly recessed reinforcing rib groove on the side walls of the outer end corners opposite the positioning port. The reinforcing rib groove can increase the overall strength of the outer frame, and when multiple profiles are combined into a frame, the inwardly recessed reinforcing rib groove can serve as a glue sealing surface. The glue in the reinforcing rib groove can form a cylindrical sealing glue, increasing the sealing performance.

[0020] As preferred, a sawtooth-shaped concave-convex structure is formed on the outer wall of the outer frame inside the positioning port. The concave-convex structure increases the strength on the one hand, and increases the adhesion of the sealing glue on the other hand, ensuring the sealing performance.

[0021] As preferred, a slope is formed on the bottom of the positioning port towards the slot direction, a sawtooth-shaped concave-convex structure is formed on the outer wall of the slope, and a hole groove is formed on the inner wall of the slope. The slope in this scheme is used to adapt to the end corner of the heat exchange plate, and the hole groove is used to increase the strength of the slope.

[0022] In a further preferred embodiment, a small boss is formed at the root of the support positioning boss above the plate body, which can further improve the overall strength of the support positioning boss; and the length direction ends of the small boss protrude from the width direction sides of the support positioning boss, which can increase the heat exchange area on one hand, and the protruding part can generate a turbulence effect on the gas in the air duct, so as to disrupt the air temperature stratification and improve the heat exchange efficiency.

[0023] In a specific embodiment, the protruding parts of the small boss relative to the support positioning boss are constructed as circular arc end angles. The circular arc end angles can reduce the air resistance generated by the gas flow as much as possible on the basis of generating turbulence.

[0024] As a preferred, the length direction axis of the small boss is perpendicular to the air duct direction axis.

[0025] The heat exchange plate is made by a blow molding method, the support positioning boss is constructed as large from the root to small at the top, and the annular side wall of the support positioning boss is gradually inclined to the center from the root to the top. The structure of the support positioning boss with the small upper part and the large lower part can reduce the substrate thinning rate in the blow molding process. Further, the transverse section of the support positioning boss is constructed as an ellipse or a prism, and the long edge of the transverse section is constructed as a circular arc surface or an inclined surface. In this shape, the fluid resistance generated by the support positioning boss is the smallest.

[0026] As a preferred, the plate body top surface between the two first folding edges is further constructed with a plurality of upward protruding ribs, which can increase the strength and heat exchange area of the heat exchange plate. Further, the extension direction of the ribs is arranged along the air duct direction to reduce the fluid resistance.

[0027] In a specific embodiment, the ribs are continuous or spaced protruding from the plate body top surface, and the ribs can be straight, wavy or zigzag.

[0028] As a preferred, the plate body is further constructed with a second folding edge folded downward at the air inlet end and the air outlet end of the air duct. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The structure diagram of the air heat exchanger involved in the present application.

[0030] Figure 2 The structure diagram of the heat exchange plate.

[0031] Figure 3 The combined local diagram of the single folding edge heat exchange plate.

[0032] Figure 4 The combined local diagram of the double folding edge heat exchange plate.

[0033] Figure 5 is a sectional view of the heat exchange plate assembly.

[0034] Figure 6 is an enlarged view of A of Figure 5

[0035] Figure 7 is a first structural schematic view of the corner connecting profile.

[0036] Figure 8 is a second structural schematic view of the corner connecting profile.

[0037] Figure 9 is a schematic view of the combination of multiple corner connecting profiles.

[0038] Figure 10 is a partial enlarged view of Figure 1 DETAILED DESCRIPTION

[0039] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations throughout the several figures of the drawings and any description of the same or similar components can be used interchangeably. The embodiments described below are exemplary, and are intended to be illustrative of the present application rather than limiting.

[0040] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] In addition, the terms "first" and "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0042] ​​In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0044] As shown in Figures 1-10 The present embodiment relates to an air heat exchanger, comprising a frame, and a heat exchange assembly arranged in the frame. The heat exchange assembly comprises a plurality of heat exchange plates 1 stacked in 90 degrees up and down alternately, and the plurality of heat exchange plates 1 alternately form a transverse air duct 100 and a longitudinal air duct 101. The longitudinal air duct 101 and the transverse air duct 100 are respectively used for sending in warm air and cold air, and heat exchange is realized based on the heat exchange plates 1.

[0045] As shown in Figure 2 and 3 The heat exchange plate 1 comprises a square plate body 10, and the plate body 10 is only provided with a first folded edge 11 folded upward on one set of opposite edges. The plate body 10 between the two first folded edges 11 serves as an air duct, and the other set of opposite edges of the plate body 10 respectively serve as an air inlet end 10a and an air outlet end 10b of the air duct. Figure 4 In another embodiment, as shown in

[0046] The plate body 10 in the air duct is provided with a plurality of upwardly protruding support positioning bosses 13 arranged in a matrix on the top surface and symmetrically centered, and the support positioning bosses 13 are constructed as streamlined bosses with the length direction extending along the air duct direction. The plate body 10 is constructed with a positioning groove 14 on the back surface of the support positioning boss 13, and when the two heat exchange plates 1 are stacked in an alternating manner, the support positioning boss 13 of the lower heat exchange plate 1 is clamped into the positioning groove 14 of the upper heat exchange plate 1 to achieve positioning.

[0047] The technical scheme relates to a heat exchange plate 1, which is used in a manner that a plurality of heat exchange plates are stacked in an alternating manner in an up-down direction at an angle of 90°, and a longitudinal air duct 101 and a transverse air duct 100 are formed between the adjacent two heat exchange plates 1 for feeding warm air and cold air, respectively, and heat exchange is achieved based on the heat exchange plate 1. In the scheme, a group of opposite edges of the heat exchange plate 1 are constructed as first folded edges 11, and a plurality of support positioning bosses 13 are arranged in a matrix and symmetrically centered inside the air duct between the two first folded edges 11. When the two plates are stacked in an alternating manner, the upper heat exchange plate 1 is erected on the two first folded edges 11 of the lower heat exchange plate 1, and the middle region is supported by the support positioning bosses 13 to ensure that the height of each region of the air duct formed between the two heat exchange plates 1 is consistent. Moreover, the support positioning bosses 13 in the scheme are constructed as streamlined bosses with the length direction extending along the air duct direction, so that the fluid resistance of air flowing into the air duct can be reduced.

[0048] On this basis, the scheme is constructed with a positioning groove 14 on the back surface of each support positioning boss 13, and the support positioning boss 13 of the lower heat exchange plate 1 is clamped into the positioning groove 14 of the upper heat exchange plate 1 to achieve positioning. In this way, the support positioning boss 13 supports the upper heat exchange plate 1 to form an air duct, and the two heat exchange plates 1 are quickly aligned and positioned. Compared with the prior art described in the background art, the scheme omits the clamping cap and clamping groove arranged on the edge, and directly constructs the positioning mechanism as the support positioning boss 13 and the positioning groove 14 on the back surface, which can fully utilize the heat exchange area and ensure the heat exchange efficiency. On the other hand, the upper and lower heat exchange plates 1 are positioned in each region, the plate spacing error can be controlled, and the plate gap is uniform.

[0049] In a further preferred embodiment, the positioning groove 14 is constructed with a small boss 15 at the root of the support positioning boss 13 above the plate body 10, which can further enhance the overall strength of the support positioning boss 13. Moreover, the lengthwise ends of the small boss 15 protrude from the widthwise sides of the support positioning boss 13, which can on one hand increase the heat exchange area, and on the other hand the protruding parts can generate turbulence effect on the gas in the air duct, so as to be able to disrupt the air temperature stratification and improve the heat exchange efficiency. In a specific embodiment, the lengthwise axis of the small boss 15 is perpendicular to the air duct direction axis. The protruding parts of the two ends of the small boss 15 relative to the support positioning boss 13 are constructed as circular arc end angles. The circular arc end angles can reduce the air resistance generated to the air flow as much as possible on the basis of generating turbulence.

[0050] The heat exchange plate 1 is made by blow molding, and the support positioning boss 13 is constructed with a large root outer contour and a small top outer contour, and the annular side wall of the support positioning boss 13 gradually tilts towards the center from the root to the top. The structure of the support positioning boss 13 with the small top and the large bottom can reduce the substrate thinning rate in the blow molding process. Further, the transverse cross section of the support positioning boss 13 is constructed as an ellipse or a prism, and the long edge of the transverse cross section is constructed as a circular arc surface or an inclined surface. In this shape, the fluid resistance generated by the support positioning boss 13 is the smallest.

[0051] As shown in Figures 2-5 , the top surface of the plate body 10 between the two first folded edges 11 is also constructed with a plurality of upward protruding ribs 16, which increase the strength of the heat exchange plate 1 and increase the heat exchange area. Moreover, the extension direction of the ribs 16 is arranged along the air duct direction to reduce the fluid resistance. In a specific embodiment, the ribs 16 are continuous or spaced upward protruding from the top surface of the plate body 10, and the ribs 16 can be straight, wavy or zigzag.

[0052] As shown in Figure 1 , 7-10, the frame body includes an end angle connecting profile 2, which includes a profile body with a closed annular outer frame 21, and a hole slot 22 is constructed inside the outer frame 21 for connecting a screwing component. A positioning port 23 is recessed at one end angle of the outer frame 21, and the inner shape of the positioning port 23 is constructed to be adapted to the end angle of the heat exchange plate 1. The outer frame 21 on both sides of the slot of the positioning port 23 protrudes outwardly to form a boss 24 for preventing the sealant 3 from overflowing. This technical scheme uses the end angle connecting profile 2 to replace the above-mentioned prior art edge covering strip, and the end angle connecting profile 2 is made by integral stretching, which has better strength than the edge covering strip. The hole slot 22 is further constructed inside the end angle connecting profile 2, so that the upper and lower sealing plates can be connected and fixed on the end of the end angle connecting profile 2 by using the screwing component, so as to ensure the connection strength.

[0053] More importantly, the cross-sectional shape of the corner connecting profile 2 in this scheme, especially the shape inside the positioning port 23, can be designed based on the combined corner shape of the multiple heat exchange plates, and then integrally stretched to obtain. Therefore, the corner connecting profile 2 in this scheme has high compatibility with the combined corner of the heat exchange plates, prevents local over-thickening of the glue, reduces the glue setting time, ensures the sealing performance of the glue, reduces the amount of glue used, and reduces the cost.

[0054] On this basis, the sealing glue 3 is applied inside the positioning port 23, and the boss 24 on both sides of the slot of the positioning port 23 can place the overflow of the sealing glue 3, so as to seal the sealing glue 3 inside the positioning port 23, so as to ensure the sealing effect of the sealing glue 3.

[0055] In a further scheme, the hole groove 22 inside the outer frame 21 is a hole groove 22 with a notched side wall, and the notches of the multiple hole grooves 22 are oriented differently. As described above, the hole groove 22 is a screw mounting hole for connecting the corner connecting profile 2 with the upper and lower profiles, and the notches of the hole grooves 22 are oriented differently, so that the screw axis shear force tends to be uniform. The outer wall of the outer frame 21 on both sides of the slot of the positioning port 23 is respectively provided with a hole groove 22, and the boss 24 is constructed as part of the side wall of the hole groove 22. In this scheme, the hole groove 22 is the position of the screw part for tightening connection, and the boss 24 is also protruded outward to form, which can be achieved in one step. And after the screw part is screwed into the position of the hole groove 22, the boss 24 can be further pressed outward, further improving the effect of preventing the sealing glue 3 from overflowing.

[0056] As shown in the figure, the outer frame 21 is provided with an inwardly recessed reinforcing rib groove 25 on the side walls of the outer corners opposite to the positioning port 23. The reinforcing rib groove 25 can increase the overall strength of the outer frame 21. As shown in the figure, Figure 9 When multiple profiles are combined into a frame, the inwardly recessed reinforcing rib groove 25 can be used as a glue sealing surface, and the glue inside the reinforcing rib groove 25 can form a cylindrical sealing glue 3 body, increasing the sealing performance.

[0057] In a further scheme, the outer wall of the outer frame 21 inside the positioning port 23 is provided with a sawtooth-shaped concave-convex structure 27. The concave-convex structure can increase the strength on the one hand, and can increase the adhesion of the sealing glue 3 on the other hand, to ensure the sealing performance.

[0058] As shown in the figure, Figure 7 In one of the embodiments, the bottom of the positioning port 23 is provided with a slope 26 facing the slot direction, the outer wall of the slope 26 is provided with a sawtooth-shaped concave-convex structure 27, and the inner wall of the slope 26 is provided with a hole groove 22. The slope 26 in this scheme is used to adapt to the corner of the heat exchange plate 1, and the hole groove 22 is used to increase the strength of the slope 26.

[0059] As shown in the figure, Figure 8In another embodiment shown, the bottom of the positioning opening 23 is constructed with an inner end corner 28 protruding towards the direction of the slot opening, and the inner end corner 28 is connected with its opposite outer end corner by a reinforcing rod 29, and the reinforcing rod 29 is provided with a hole slot 22. The inner end corner 28 in this embodiment is used to fit with the end corner of the heat exchange plate 1, and the reinforcing rod 29 and the hole slot 22 thereon are used to increase the strength of the whole profile, and in this embodiment, the concave-convex structure 27 can also be provided on the outer surface of the inner end corner 28.

[0060] The principles of the above two embodiments are the same, and the inner shape of the positioning opening 23 is designed based on the shape of the end corner of the heat exchange plate 1, so the person skilled in the art has the motivation to change the end corner of the heat exchange plate 1 and the inner structure of the positioning opening 23 of the profile to any desired matching structure based on the present case.

[0061] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application without departing from the principles and purposes of the present application.

Claims

1. An air heat exchanger, comprising a frame and a heat exchange assembly disposed within the frame; the heat exchange assembly comprising multiple heat exchange plates (1) stacked at 90-degree angles, the multiple heat exchange plates (1) alternately forming a transverse air duct (100) and a longitudinal air duct (101); each heat exchange plate (1) comprises a square plate body (10), the plate body (10) having an upwardly folded first fold (11) on only one set of its opposite edges, the plate body (10) between the two first folds (11) serving as an air duct, and the other set of opposite edges of the plate body (10) serving as the air inlet (10a) and air outlet (10b) of the air duct, respectively; characterized in that: The plate body (10) in the air duct has a matrix arrangement and a central symmetry on the top surface with multiple upward protruding support and positioning bosses (13). The support and positioning bosses (13) are constructed as streamlined bosses that extend along the air duct direction in the length direction. The plate body (10) has a positioning groove (14) on the back of the support and positioning bosses (13). When two heat exchange plates (1) are stacked alternately, the support and positioning bosses (13) of the lower heat exchange plate (1) are inserted into the positioning grooves (14) of the upper heat exchange plate (1) and are positioned. The frame includes an end corner connecting profile (2), which includes a profile body. The profile body has a closed annular outer frame (21). A positioning port (23) is recessed at one end corner of the outer frame (21). The internal shape of the positioning port (23) is configured to fit the end corner of the heat exchange plate (1). The outer frame (21) on both sides of the positioning port (23) has protrusions (24) to prevent the sealant (3) from overflowing. The end corner of the heat exchange plate (1) of the heat exchange assembly extends into the positioning port (23) of the end corner connecting profile (2). Sealant (3) is applied inside the positioning port (23) between the two protrusions (24).

2. An air heat exchanger according to claim 1, characterized in that: The outer frame (21) has slots (22) inside for connecting screwed components; the slots (22) inside the outer frame (21) are slots (22) with notches on the sidewalls, and the notches of the multiple slots (22) are oriented in different directions.

3. An air heat exchanger according to claim 2, characterized in that: Holes (22) are respectively constructed on the inner walls of the outer frame (21) on both sides of the positioning port (23) slot, and the boss (24) is constructed as part of the side wall of the hole (22).

4. An air heat exchanger according to claim 1, characterized in that: The outer frame (21) has inwardly recessed reinforcing rib grooves (25) on the two side walls of the outer corner opposite to the positioning port (23).

5. An air heat exchanger according to claim 1, characterized in that: The outer wall of the outer frame (21) inside the positioning port (23) has a serrated concave-convex structure (27).

6. An air heat exchanger according to claim 1, characterized in that: The bottom of the positioning port (23) is constructed with an inclined surface (26) facing the slot direction. A serrated concave-convex structure (27) is constructed on the outer wall of the inclined surface (26), and a hole groove (22) is constructed on the inner wall of the inclined surface (26).

7. An air heat exchanger according to claim 1, characterized in that: The positioning groove (14) is constructed at the root of the support positioning boss (13) above the plate body (10) to form a small boss (15). The two ends of the small boss (15) in the length direction protrude from both sides of the support positioning boss (13) in the width direction. The protruding parts of the small boss (15) at both ends relative to the support positioning boss (13) are constructed as rounded end corners.

8. An air heat exchanger according to claim 1, characterized in that: The supporting positioning boss (13) is constructed with a large outer contour at the root and a small outer contour at the top, and the annular sidewall of the supporting positioning boss (13) gradually slopes towards the center from its root to its top; the transverse cross section of the supporting positioning boss (13) is constructed as an ellipse or a rhombus, and the long edge of the transverse cross section is constructed as a circular arc surface or a slope (26).

9. An air heat exchanger according to claim 1, characterized in that: The top surface of the plate body (10) between the first folded edges (11) on both sides is also constructed with multiple upward protruding ribs (16). The ribs (16) extend along the direction of the air duct. The ribs (16) protrude continuously or intermittently from the top surface of the plate body (10). The ribs (16) are straight, wavy, or broken.

10. An air heat exchanger according to claim 1, characterized in that: The plate body (10) also has a second folded edge (12) that folds downward on the air inlet end (10a) and air outlet end (10b) of the air duct.

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