Air conditioner with PTC heater
By using integrated heat dissipation fins, the "white powder" phenomenon caused by the generation of high-temperature oxides during heating of traditional PTC heaters is solved, and the effects of simplification of production, cost reduction and environmental protection are achieved.
Patent Information
- Application Number
- CN202411879756.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-03-07
AI Technical Summary
Traditional PTC heaters will produce high-temperature oxides during heating, resulting in the air conditioner blowing "white powder". Chemical treatment is required in the existing technology, which increases manufacturing costs and environmental pollution.
Integrated heat dissipation fins are used instead of the traditional high-temperature welding structure of aluminum strips and fins, and the high-temperature welding process is eliminated to avoid the formation of high-temperature oxides.
It effectively eliminates the phenomenon of "white powder" blowing of air conditioners, simplifies production processes, reduces production costs, and avoids environmental pollution.
Smart Images
Figure CN119573140A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioner with a PTC heater. Background Art
[0002] like Figure 1 As shown, the traditional PTC (Positive Temperature Coefficient) heater adopts a corrugated radiator structure, and the corrugated radiator is formed by high-temperature welding of two upper and lower aluminum strips and corrugated aluminum sheets. Then, the corrugated radiator and the heating core aluminum tube are bonded and cured by silicone to form a PTC heater product (PTC electric heater). Among them, high-temperature oxides will be produced at the high-temperature welding point between the aluminum strips and the corrugated aluminum sheets. The high-temperature oxides will form crystals after being soaked in the condensed water of the air conditioner in the summer. The crystals will be blown out in the form of powder during heating in the winter, resulting in after-sales feedback that the air conditioner blows "white powder". In order to overcome the above-mentioned deficiency of blowing "white powder" when the air conditioner is in heating operation, a series of processing procedures need to be added in the relevant technology to chemically treat the high-temperature oxides on the surface of the electric heater. This chemical treatment method increases the manufacturing cost and causes environmental pollution. Summary of the invention
[0003] Therefore, the present invention provides an air conditioner with a PTC heater, which can overcome the technical problems in the related art of chemically treating the high-temperature oxide on the surface of the electric heater in order to overcome the deficiency of blowing "white powder" during the heating operation of the air conditioner, thereby increasing the manufacturing cost and causing environmental pollution.
[0004] In order to solve the above problems, the present invention provides an air conditioner with a PTC heater, comprising a PTC heater, wherein the PTC heater comprises a heating core and a heat dissipation structure connected to the heating core, wherein the heat dissipation structure is an integrally formed heat dissipation fin.
[0005] In some embodiments, the air conditioner further includes an indoor heat exchanger and an indoor fan, and the PTC heater is located in a region between an air outlet side of the indoor heat exchanger and an air inlet side of the indoor fan.
[0006] In some embodiments, the heat dissipation fins include a plurality of heat dissipation units spaced apart along the length direction of the heat generating core, each heat dissipation unit includes a first segment that is fitted and connected to the outer wall surface of the heat generating core, and each of the first segments has a second segment extending along a side away from the heat generating core at both ends of its length, an end of each of the second segments away from the first segment is an outer end, an end of each of the second segments connected to the first segment is an inner end, and the distance between two of the second segments in each of the heat dissipation units becomes smaller and smaller from their respective inner ends to their outer ends, and two adjacent heat dissipation units are connected as a whole by a third segment, and the third segment is connected to the outer end of the second segment.
[0007] In some embodiments, the first segments are arranged at equal intervals along the length direction of the heating core, and the first segment and the second segments at both ends thereof together surround a flow area of an isosceles trapezoid or an isosceles triangle; and / or, a first reinforcing rib is formed on the second segment, and the first reinforcing rib extends along the inner end to the outer end of the second segment.
[0008] In some embodiments, a flow gap is formed between outer ends of two second segments in the same heat dissipation unit.
[0009] In some embodiments, the width of the flow gap is b, 0.1 mm≤b≤5 mm.
[0010] In some embodiments, a buffer spacer is provided in the flow gap.
[0011] In some embodiments, the buffer spacer includes a buffer column, the connection position between the second segment and the third segment is a connecting corner, a second reinforcing rib is also formed on the second segment, the second reinforcing rib extends along the width direction of the heating core, and the second reinforcing rib on each second segment protrudes toward one side of the current gap close to the second segment, and the end face of the buffer column facing the heating core is supported on the second reinforcing rib; and / or the material of the buffer spacer is rubber.
[0012] In some embodiments, the buffer spacer further includes an outer positioning beam, which is connected to a side of the buffer column away from the first segment to form limiting grooves on both sides of the buffer spacer that match the shape of the connecting corner.
[0013] In some embodiments, the buffer spacer is bonded to the second segment and / or the third segment; and / or, a plurality of the buffer spacers are provided in the same flow gap, and the buffer spacers are spaced apart along the width direction of the heating core.
[0014] The air conditioner with a PTC heater provided by the present invention has the following beneficial effects:
[0015] The heat dissipation structure is formed by using an integrally formed heat dissipation fin. Compared with the heat dissipation structure of high-temperature welding of aluminum strips and fins used in the prior art, the high-temperature welding process of the traditional aluminum strips and corrugated aluminum sheets is eliminated, and there is no need to chemically treat the high-temperature oxides formed by high-temperature welding. Under the premise of effectively preventing the occurrence of the "white powder" phenomenon of air conditioners, the production process is simplified, the production cost is reduced, and the pollution to the environment is eliminated;
[0016] By arranging the PTC heater in the area between the air outlet side of the indoor heat exchanger and the air inlet side of the indoor fan, the air outlet of the indoor heat exchanger can be heated again when the PTC heater is running, and further mixed in the indoor fan, thereby ensuring the uniformity of the hot air flow of the air conditioner.
[0017] With respect to the two second segments at both ends of the same first segment, and the distance between the two segments from the inner end to the outer end becomes smaller and smaller, the heat dissipation structure forms a roughly triangular structure as a whole, and the bottom side of the triangular heat dissipation structure is connected to the heating core body, and has a larger contact area. In this way, on the one hand, the heat dissipation structure and the heating core body can have a larger matching connection surface, thereby ensuring a greater connection strength between the two, preventing the airflow disturbance from causing the connection between the heat dissipation structure and the heating core body to crack, and being suitable for indoor fan working conditions with higher speeds; on the other hand, the heat dissipation structure can form a larger heat exchange and heat conduction area with the heating core body, thereby improving the heating and heat exchange effect of the heat dissipation structure on the airflow passing through;
[0018] A flow gap is formed between two adjacent third segments, that is, there is a gap between the two adjacent third segments, which can prevent the two adjacent second segments or third segments from contacting and colliding with each other under the impact and disturbance of the airflow, and at the same time, it can also increase the flow area of the heat dissipation structure, further improving the heat exchange effect;
[0019] By arranging a buffer spacer in the aforementioned current-passing gap, the position stability of the outer end of the second segment and the corresponding third segment can be improved, and the risk of the second segment and the third segment deforming and exerting force on the first segment, resulting in cracking of the connection between the first segment and the heating core, can be prevented;
[0020] On the one hand, the buffer column with an isosceles trapezoidal cross section is placed in the flow gap to achieve reliable buffer support for the second segments on both sides. On the other hand, by arranging raised second reinforcing ribs at the outer ends of the two second segments close to each other, the structural strength and heat exchange area of the second segments are further improved while also being able to form a reliable limit for the buffer column. The installation structure of the buffer column is simple and compact.
[0021] By arranging a plurality of buffer spacers at intervals in the same flow gap, it is possible to achieve multi-point damping vibration of the second segments on both sides in the width direction while reducing the obstruction of the flow area of the flow gap. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0023] Figure 1 It is a schematic diagram of the structure of a traditional PTC heater in the prior art;
[0024] Figure 2 is a schematic diagram of the three-dimensional structure of a PTC heater in an air conditioner having a PTC heater according to an embodiment of the present invention;
[0025] Figure 3 yes Figure 2 A partial enlarged view of the middle A;
[0026] Figure 4 yes Figure 2 A partial structural schematic diagram of a front view of a PTC heater;
[0027] Figure 5 yes Figure 2 A schematic diagram of a partial structure of a top view of a PTC heater;
[0028] Figure 6 yes Figure 2 A schematic diagram of the dimensions of the heat dissipation structure of the PTC heater in a specific embodiment;
[0029] Figure 7 yes Figure 2 A schematic diagram of the dimensions of a first reinforcing rib of a heat dissipation structure of a PTC heater in a specific embodiment;
[0030] Figure 8 yes Figure 2 The heat transfer efficiency simulation diagram of the PTC heater in the figure;
[0031] Fig. 9 is a partial structural schematic diagram (front view) of a heat dissipation structure in another embodiment of the present invention;
[0032] Fig.10 yes Fig. 9 A top view of
[0033] Fig.11 yes Fig. 9 Schematic diagram of the structure of the buffer spacer.
[0034] The accompanying drawings are marked as follows:
[0035] 10. PTC heater; 1. Heating core; 2. Heat dissipation structure; 20. Heat dissipation unit; 21. First segment; 22. Second segment; 221. First reinforcing rib; 222. Second reinforcing rib; 23. Third segment; 24. Connecting corner; 25. Current gap; 3. Buffer spacer; 31. Buffer column; 32. Outer positioning beam; 33. Limiting groove. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0039] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.
[0040] See also Figures 2 to 11 As shown, according to an embodiment of the present invention, an air conditioner with a PTC heater is provided, comprising an air conditioner housing (not shown in the figure), an indoor heat exchanger (not shown in the figure) and an indoor fan (not shown in the figure) are arranged in the air conditioner housing, an air inlet (not shown in the figure) and an air outlet (not shown in the figure) are formed on the air conditioner housing, and the indoor fan can be a cross-flow fan. When the indoor fan is driven, the air outside the air conditioner is sucked into the air conditioner through the air inlet and flows through the indoor heat exchanger for heat exchange and then is sent to the air outlet to achieve the purpose of temperature adjustment of the indoor space. The air conditioner also includes a PT C heater 10, the PTC heater 10 is arranged in the air-conditioning shell, the PTC heater 10 includes a heating core 1 and a heat dissipation structure 2 connected to the heating core 1, the heat dissipation structure 2 is an integrally formed heat dissipation fin, the aforementioned PTC heater 10 is specifically an electric heater, correspondingly, the aforementioned heating core 1 includes an aluminum tube, the aforementioned integrally formed heat dissipation fin is connected to the outer wall of the aluminum tube after being cured by silicone bonding, the material of the aforementioned heat dissipation fin can be aluminum or copper, in a specific embodiment, the aforementioned heat dissipation structure 2 is formed by stamping and bending of aluminum plate or injection molding.
[0041] In this technical solution, the aforementioned heat dissipation structure 2 is formed by an integrally formed heat dissipation fin. Compared with the heat dissipation structure of high-temperature welding of aluminum strips and fins adopted in the prior art, the high-temperature welding process of traditional aluminum strips and corrugated aluminum sheets is eliminated, and there is no need to chemically treat the high-temperature oxides formed by high-temperature welding. Under the premise of effectively preventing the occurrence of the "white powder" phenomenon blown by the air conditioner, the production process is simplified, the production cost is reduced, and pollution to the environment is eliminated.
[0042] In some embodiments, the PTC heater 10 is located in a region between an air outlet side of the indoor heat exchanger and an air inlet side of the indoor fan.
[0043] In this technical solution, by arranging the PTC heater 10 in the area between the outlet side of the indoor heat exchanger and the inlet side of the indoor fan, the outlet air of the indoor heat exchanger can be heated again when the PTC heater 10 is running, and further mixed in the indoor fan, thereby ensuring the uniformity of the hot air flow of the air conditioner.
[0044] See Figure 3 As shown, in some embodiments, the heat dissipation fins include a plurality of heat dissipation units 20 spaced apart along the length direction of the heat generating core 1, each of the heat dissipation units 20 includes a first segment 21 that is fitted and connected to the outer wall surface of the heat generating core 1, and each of the first segments 21 has a second segment 22 extending along a side away from the heat generating core 1 at both ends of its length, an end of each of the second segments 22 away from the first segment 21 is an outer end, an end of each of the second segments 22 that is connected to the first segment 21 is an inner end, and the spacing between the two second segments 22 in each of the heat dissipation units 20 becomes smaller and smaller from their respective inner ends to their outer ends, and two adjacent heat dissipation units 20 are connected as a whole by a third segment 23, and the third segment 23 is connected to the outer end of the second segment 22.
[0045] In this technical solution, there are two second segments 22 at both ends of the same first segment 21, and the distance between the two second segments 22 becomes smaller and smaller in the direction from the inner end to the outer end, so that the heat dissipation structure 2 forms a roughly triangular structure as a whole, and the bottom side of the triangular heat dissipation structure 2 is connected to the heating core 1, and has a larger contact area. In this way, on the one hand, the heat dissipation structure 2 and the heating core 1 can have a larger matching connection surface, thereby ensuring a greater connection strength between the two, preventing airflow disturbance from causing cracking of the connection between the heat dissipation structure 2 and the heating core 1, and being suitable for indoor fan conditions with higher speeds; on the other hand, the heat dissipation structure 2 can form a larger heat exchange and heat conduction area with the heating core 1, thereby improving the heating and heat exchange effect of the heat dissipation structure 2 on the airflow passing through.
[0046] In a specific embodiment, the first segments 21 are arranged at equal intervals along the length direction of the heating core 1, and the first segment 21 and the second segments 22 at both ends thereof together surround a flow area of an isosceles trapezoid or an isosceles triangle. At this time, the base of the isosceles trapezoid or the isosceles triangle is also the first segment 21. Correspondingly, from the geometric structure relationship, it can be known that the third segment 23 and the first segment 21 are parallel to each other and have the same length, and the structure is simple and compact.
[0047] In order to further increase the heat dissipation area of the heat dissipation structure 2, the length of the second segment 22 in the direction away from the heat core 1 can be lengthened if space permits. At this time, it is best to form a first reinforcing rib 221 on the second segment 22, and the first reinforcing rib 221 extends from the inner end to the outer end of the second segment 22 to improve the structural strength of the second segment 22 and prevent the cantilever structure from causing excessive flexibility and structural instability. The first reinforcing rib 221 can be formed by stamping on the fin.
[0048] As mentioned above, the second segment 22 objectively forms a cantilever structure, which shakes under the impact disturbance of the airflow generated by the operation of the indoor fan, which will cause the two adjacent second segments 22 to contact and collide at the outer end position, thereby causing noise, and there is also a risk of fin collision damage. Based on the above problem, in some embodiments, a flow gap 25 is formed between the outer ends of the two second segments 22 in the same heat dissipation unit 20, that is, there is a spacing between the two adjacent third segments 23, which can prevent the two adjacent second segments 22 or third segments 23 from contacting and colliding with each other under the impact disturbance of the airflow, and at the same time, it can also increase the flow area of the heat dissipation structure 2, further improving the heat exchange effect. It can be understood that the flow gap 25 can also prevent the occurrence of abnormal noise caused by the contact friction between the adjacent second segments 22 and the third segments 23 due to the thermal expansion and contraction of the heat dissipation fins.
[0049] In a specific embodiment, the width of the flow gap 25 is b, 0.1mm≤b≤5mm. When the thickness of the heat sink fin is relatively large, the value of the flow gap 25 can be relatively small, which can also facilitate the integrated molding of the heat sink fin.
[0050] See Figure 8As shown, in the aforementioned technology of the present invention, the heat dissipation structure 2 adopts a triangular layout (that is, the aforementioned isosceles trapezoidal layout), and more space is left in the middle of the triangle, so that more airflow can flow through the fins, and the overall temperature rise of the airflow becomes slower, so that it can fully exchange heat with the entire row of fins, and a first reinforcing rib 221 is designed on the side of the fin to increase the heat exchange area and improve the heat exchange efficiency. Heat exchange also occurs between the far edge of the fin and the airflow passing through the outside of the electric auxiliary heat, and the heat exchange area is further increased, the overall gap is larger, the flow resistance is smaller, and the impact on the air volume of the whole machine is also smaller.
[0051] In a specific embodiment, in conjunction with Figure 6 and Figure 7 As shown, the base angle α of the triangular heat dissipation structure (i.e., the base angle of the isosceles trapezoid) is 30° to 90°, the length a of the base is 2 to 6 mm, the thickness d is 0.15-0.4 mm, and the height h of the triangular heat dissipation structure is 5-20 mm. The length L of the isosceles plane (i.e., the width of the second segment 22) is 10-30 mm, the convex reinforcing ribs (i.e., the aforementioned first reinforcing ribs 221) protrude inward (i.e., protrude in the direction of the second segment 22 at the other end of the same first segment 21), the number of convex reinforcing ribs and the spacing f are not limited, the length n and width m of the convex reinforcing ribs are not limited, and the convex reinforcing ribs can be arranged in parallel in vertical or horizontal rows, or in staggered arrangements in any direction.
[0052] See Figures 9 to 11 As shown, in another feasible embodiment, a buffer spacer 3 is provided in the flow gap 25. Specifically, when the flow gap 25 is small, the buffer spacer 3 can be formed by dispensing glue (such as silicone) at the position of the flow gap and solidifying it. The process is simple and reliable. When the flow gap 25 is large, a corresponding buffer spacer 3 can be separately provided to achieve this.
[0053] In this technical solution, by arranging a buffer spacer 3 in the aforementioned current gap 25, the position stability of the outer end of the second segment 22 and the corresponding third segment 23 can be improved, and the risk of the second segment 22 and the third segment 23 deforming and applying force to the first segment 21, which may cause the connection between the first segment 21 and the heating core 1 to crack, can be prevented. In addition, it can be understood that the phenomenon of large displacement of the second segment 22 and the third segment 23 caused by the impact during transportation and handling of the PTC heater can also be prevented.
[0054] In a specific embodiment, the material of the aforementioned buffer spacer 3 is rubber, which has a higher buffering effect and a lower manufacturing cost.
[0055] See Fig.11As shown, in some embodiments, the buffer spacer 3 includes a buffer column 31, and the connection position of the second segment 22 and the third segment 23 is the connection corner 24 ( Figure 3 Indicated in the middle), in a specific embodiment, the cross-section of the buffer column 31 is an isosceles trapezoid, so that it can match the shape of the inclined surface position of the two connecting corners 24, thereby forming a reliable support, and a second reinforcing rib 222 is also formed on the second segment 22, and the second reinforcing rib 222 extends along the width direction of the heating core 1, and the second reinforcing rib 222 respectively provided on each second segment 22 protrudes toward one side of the flow gap 25 close to the second segment 22, and the inner end face of the buffer column 31, that is, the end face facing the side of the heating core 1, is supported on the second reinforcing rib 222, that is, the two raised second reinforcing ribs 222 on both sides are supported on the inner end face of the buffer column 31.
[0056] In this technical solution, on the one hand, a buffer column 31 having an isosceles trapezoidal cross-section is located in the flow gap 25 to achieve reliable buffering support for the second segments 22 on both sides; on the other hand, raised second reinforcing ribs 222 are provided at the outer ends of the two second segments 22 close to each other, which further improves the structural strength and heat exchange area of the second segments 22 while also forming a reliable limit for the buffer column 31. The installation structure of the buffer column 31 is simple and compact.
[0057] In some embodiments, the buffer spacer 3 further includes an outer positioning beam 32 , which is connected to the side of the buffer column 31 away from the first segment 21 to form a limiting groove 33 on both sides of the buffer spacer 3 that matches the shape of the connecting corner 24 .
[0058] In this technical solution, an outer positioning beam 32 is provided on the outer side of the buffer column 31 so that limiting grooves 33 matching the aforementioned connecting corners 24 are formed on both sides of the buffer spacer 3. During the specific assembly, it can be slid and inserted from both ends of the aforementioned flow gap 25, and the assembly is simple and convenient.
[0059] In order to ensure the connection reliability and convenience between the buffer spacer 3 and the heat dissipation structure 2 , the buffer spacer 3 is bonded to the second segment 22 and / or the third segment 23 .
[0060] In some other feasible implementations, a plurality of the buffer spacers 3 are provided in the same flow gap 25 , and the buffer spacers 3 are spaced apart along the width direction of the heating core 1 .
[0061] In this technical solution, by arranging a plurality of buffer spacers 3 at intervals in the same flow gap 25, it is possible to achieve multi-point damping vibration of the second segments 22 on both sides in the width direction while reducing the obstruction of the flow area of the flow gap 25.
[0062] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.
[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.
Claims
1. An air conditioner with a PTC heater, characterized in that: The PTC heater (10) comprises a heating core (1) and a heat dissipation structure (2) connected to the heating core (1), wherein the heat dissipation structure (2) is an integrally formed heat dissipation fin.
2. The air conditioner according to claim 1, characterized in that: It also includes an indoor heat exchanger and an indoor fan, and the PTC heater (10) is located in the area between the air outlet side of the indoor heat exchanger and the air inlet side of the indoor fan.
3. The air conditioner according to claim 1 or 2, characterized in that: The heat dissipation fins include a plurality of heat dissipation units (20) arranged at intervals along the length direction of the heat-generating core (1); each of the heat dissipation units (20) includes a first segment (21) that is fitted and connected to the outer wall surface of the heat-generating core (1); both ends of the length of each of the first segments (21) are respectively provided with a second segment (22) extending along a side away from the heat-generating core (1); the end of each of the second segments (22) away from the first segment (21) is an outer end; the end of each of the second segments (22) connected to the first segment (21) is an inner end; and the spacing between two of the second segments (22) in each of the heat dissipation units (20) decreases from their respective inner ends to their outer ends; two adjacent heat dissipation units (20) are connected as a whole by a third segment (23), and the third segment (23) is connected to the outer end of the second segment (22).
4. The air conditioner according to claim 3, characterized in that: Each of the first segments (21) and each of the second segments (22) at both ends thereof jointly surround a flow-through area; and / or a first reinforcing rib (221) is formed on the second segment (22), and the first reinforcing rib (221) extends along the inner end to the outer end of the second segment (22).
5. The air conditioner according to claim 3, characterized in that: A flow gap (25) is formed between the outer ends of two second segments (22) in the same heat dissipation unit (20).
6. The air conditioner according to claim 5, characterized in that: The width of the flow gap (25) is b, 0.1 mm ≤ b ≤ 5 mm.
7. The air conditioner according to claim 5, characterized in that: A buffer spacer (3) is provided in the flow gap (25).
8. The air conditioner according to claim 7, characterized in that: The buffer spacer (3) comprises a buffer column (31), the connection position between the second segment (22) and the third segment (23) is a connection corner (24), a second reinforcing rib (222) is further formed on the second segment (22), the second reinforcing rib (222) extends along the width direction of the heating core (1), and the second reinforcing rib (222) respectively provided on each second segment (22) protrudes toward a side of the flow gap (25) close to the second segment (22), and the end face of the buffer column (31) facing the heating core (1) is supported on the second reinforcing rib (222); and / or the material of the buffer spacer (3) is rubber.
9. The air conditioner according to claim 8, characterized in that: The buffer spacer (3) further comprises an outer positioning cross beam (32), wherein the outer positioning cross beam (32) is connected to a side of the buffer column (31) facing away from the first segment (21) to form a limiting groove (33) on both sides of the buffer spacer (3) that matches the shape of the connecting corner (24).
10. The air conditioner according to claim 7, characterized in that: The buffer spacer (3) is bonded to the second segment (22) and / or the third segment (23); and / or, a plurality of the buffer spacers (3) are provided in the same flow gap (25), and the buffer spacers (3) are spaced apart along the width direction of the heating core (1).