Air conditioner with PTC heater

Abstract

The utility model provides an air conditioner with a PTC (Positive Temperature Coefficient) heater, which comprises the PTC heater, the PTC heater comprises a heating core body and a heat dissipation structure connected to the heating core body, and the heat dissipation structure is an integrally formed heat dissipation fin. The heat dissipation structure is formed by the integrally formed heat dissipation fins, compared with a heat dissipation structure in which aluminum strips and fins are welded at high temperature in the prior art, the heat dissipation structure has the advantages that the traditional high-temperature welding process of the aluminum strips and the corrugated aluminum sheets is omitted, and high-temperature oxides formed by high-temperature welding do not need to be subjected to chemical treatment; on the premise that the phenomenon that the air conditioner blows white powder is effectively eradicated, the production process is simplified, the production cost is reduced, and pollution to the environment is eradicated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air conditioning technical field, concretely relates to a kind of air conditioners with PTC heater. BACKGROUND

[0002] As shown in Figure 1 Traditional PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor (resistor)) heater uses corrugated radiator structure, and the corrugated radiator is made into an integrated body by high-temperature welding of two aluminum strips and corrugated aluminum sheet, and then the corrugated radiator and the heating core aluminum tube are bonded and solidified by silica gel to become a PTC heater product (PTC electric heater). The high-temperature welding between the aluminum strip and the corrugated aluminum sheet produces high-temperature oxides. After being soaked in the condensate water of the air conditioner in summer, the high-temperature oxides form crystalline substances. The crystalline substances are blown out in the form of powder when heating in winter, resulting in complaints of "white powder" blowing from the air conditioner. In order to overcome the "white powder" blowing during heating operation of the air conditioner, a series of processing procedures are required in the related art to chemically treat the high-temperature oxides on the surface of the electric heater, which increases the manufacturing cost and causes environmental pollution. SUMMARY

[0003] Therefore, the utility model provides an air conditioner with a PTC heater, which can overcome the technical problems of chemical treatment of high-temperature oxides on the surface of the electric heater in the related art to overcome the "white powder" blowing during heating operation of the air conditioner, increase the manufacturing cost and cause environmental pollution.

[0004] To solve the above problems, the utility model provides an air conditioner with a PTC heater, which includes a PTC heater, the PTC heater includes a heating core body and a heat dissipation structure connected to the heating core body, and 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 the area between the air outlet side of the indoor heat exchanger and the air inlet side of the indoor fan.

[0006] In some embodiments, the heat dissipation fins comprise a plurality of heat dissipation units arranged along the length direction of the heat generating core, each of the heat dissipation units comprises a first segment attached to the outer wall surface of the heat generating core, each of the first segments has a second segment extending away from the heat generating core at the lengthwise ends of the first segment, the end of each of the second segments away from the first segment is an outer end, the end of each of the second segments connected to the first segment is an inner end, the distance between the two second segments in each of the heat dissipation units gradually decreases from the inner end to the outer end, and the two adjacent heat dissipation units are connected by a third segment.

[0007] In some embodiments, the first segments are arranged at equal intervals along the length direction of the heat generating core, and the first segment and the second segments at both ends thereof jointly form a flow area in the shape of an isosceles trapezoid or an isosceles triangle; and / or, the second segments are provided with first reinforcing ribs extending from the inner end to the outer end of the second segment.

[0008] In some embodiments, the outer ends of the two second segments in the same heat dissipation unit form a flow gap.

[0009] In some embodiments, the flow gap has a width b, and 0.1mm≤b≤5mm.

[0010] In some embodiments, the flow gap is provided with a buffer spacer.

[0011] In some embodiments, the buffer spacer comprises a buffer column, the connection position of the second segment and the third segment is a connection corner, the second segment is further provided with a second reinforcing rib extending along the width direction of the heat generating core, the second reinforcing rib on each of the second segments protrudes towards the side of the flow gap close to the second segment, and the end face of the buffer column towards the side of the heat generating 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 comprises an outer positioning beam connected to the side of the buffer column away from the first segment to form a limiting groove matching the shape of the connection corner at both sides of the buffer spacer.

[0013] In some embodiments, the buffer spacer is bonded to the second segment and / or the third segment; and / or, a plurality of buffer spacers are provided in the same flow gap, and the buffer spacers are arranged at intervals along the width direction of the heat generating core.

[0014] The air conditioner with the PTC heater has the following beneficial effects:

[0015] The heat dissipation fins are integrally formed to form the heat dissipation structure, compared with the heat dissipation structure formed by high-temperature welding of aluminum strips and fins in the prior art, the high-temperature welding process of the traditional aluminum strips and the corrugated aluminum sheets is cancelled, and thus the high-temperature oxides formed by the high-temperature welding do not need to be chemically treated, the production process is simplified, the production cost is reduced, and the pollution to the environment is eliminated under the premise of effectively preventing the "white powder" phenomenon of the air conditioner;

[0016] The PTC heater is arranged on the area between the air outlet side of the indoor heat exchanger and the air inlet side of the indoor fan, so that the air outlet of the indoor heat exchanger is warmed again when the PTC heater operates, and is further mixed in the indoor fan, thereby ensuring the uniformity of the air supply of the hot air flow of the air conditioner;

[0017] The two second segments at the two ends of the same first segment have a smaller and smaller spacing along the direction from the inner end to the outer end, so that the heat dissipation structure forms a substantially triangular structure as a whole, and the base of the triangular heat dissipation structure is connected to the heating core body, having a larger contact area. In this way, on the one hand, the heat dissipation structure and the heating core body have a larger matching connection surface, thereby ensuring a larger connection strength therebetween, preventing the connection between the heat dissipation structure and the heating core body from cracking due to airflow disturbance, and being suitable for higher speed indoor fan working conditions. On the other hand, the heat dissipation structure can form a larger heat exchange and heat conduction area with the heating core body, improving the heating and heat exchange effect of the heat dissipation structure on the airflow;

[0018] The flow passage gap is formed between the two adjacent third segments, that is, there is a spacing between the two adjacent third segments. On the one hand, it can prevent the two adjacent second segments or third segments from contacting and colliding with each other under the action of airflow impact disturbance, and on the other hand, it can improve the flow area of the heat dissipation structure and further improve the heat exchange effect;

[0019] The buffer spacer arranged in the flow passage gap can improve the position stability of the outer end of the second segment and the corresponding third segment, and can prevent the second segment and the third segment from deforming and applying force to the first segment, thereby preventing the connection between the first segment and the heating core body from cracking;

[0020] The reliable buffering support to the second segments on both sides is realized by the buffering column with an isosceles trapezoidal cross section in the flow gap, and the reliable limiting to the buffering column is realized by the convex second reinforcing rib arranged at the outer end position of the two second segments close to each other, so that the structural strength and heat exchange area of the second segments are further improved;

[0021] The multiple buffering spacers are arranged in the same flow gap, so that the multiple-point shock absorption and vibration of the second segments on both sides in the width direction are realized, and the flow area of the flow gap is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the embodiments or the prior art description. The drawings in the following description are merely exemplary, and for those skilled in the art, other embodiments can be derived from the provided drawings without creative labor.

[0023] Figure 1 is a structural schematic diagram of a conventional PTC heater in the prior art;

[0024] Figure 2 is a three-dimensional structural schematic diagram of a PTC heater in an air conditioner with the PTC heater according to an embodiment of the present application;

[0025] Figure 3 is Figure 2 is a partial enlarged view of A in FIG.

[0026] Figure 4 is Figure 2 is a partial structural schematic diagram of the front view of the PTC heater in FIG.

[0027] Figure 5 is Figure 2 is a partial structural schematic diagram of the top view of the PTC heater in FIG.

[0028] Figure 6 is Figure 2 is a size schematic diagram of the heat dissipation structure of the PTC heater in FIG.

[0029] Figure 7 is Figure 2 is a size schematic diagram of the first reinforcing rib of the heat dissipation structure of the PTC heater in FIG.

[0030] Figure 8 is Figure 2 is a heat exchange efficiency simulation diagram of the PTC heater in FIG.

[0031] Figure 9 is a partial structure schematic view (front view) of the heat dissipation structure in another embodiment of the utility model;

[0032] Figure 10 is a top view of Figure 9 ;

[0033] Figure 11 is a structure schematic view of the buffer spacer in Figure 9 .

[0034] The reference signs are:

[0035] 10, PTC heater; 1, heating core body; 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, flow gap; 3, buffer spacer; 31, buffer column; 32, outer side positioning cross beam; 33, limiting groove. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] In the description of the utility model, it is understood that the orientation words such as 'front, back, up, down, left, right', 'transverse, vertical, perpendicular, horizontal' and 'top, bottom' and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation on the protection scope of the utility model; the orientation words 'inner, outer' refer to the inner and outer of the contour of each component itself.

[0038] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "top", "bottom", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, elements described as "above" or "above" other elements or features would then be oriented "below" or "below" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90° or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0039] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts are distinguished, such as no other declaration, the above words have no special meaning, therefore can not be understood as the limitation of the scope of protection of the utility model.

[0040] In conjunction with Figures 2 to 11 As shown in the drawings, according to the embodiments of the utility model, a kind of air conditioner with PTC heater is provided, including air conditioner shell (not shown in the drawing), indoor heat exchanger (not shown in the drawing) and indoor fan (not shown in the drawing) are arranged in the air conditioner shell, air inlet (not shown in the drawing) and air outlet (not shown in the drawing) are formed on the air conditioner shell, the indoor fan specifically can be cross-flow fan, when the indoor fan drives, air outside air conditioner is inhaled into air conditioner interior via the air inlet and is sent to from air outlet after flowing through the indoor heat exchanger and exchanging heat, realize the temperature control purpose to indoor space, the air conditioner further includes PTC heater 10, the PTC heater 10 is arranged in the air conditioner shell, the PTC heater 10 includes heating core body 1 and the heat dissipation structure 2 connected on the heating core body 1, the heat dissipation structure 2 is one-piece heat dissipation fin, the aforementioned PTC heater 10 is electric heater specifically, correspondingly, the aforementioned heating core body 1 includes aluminum pipe, the aforementioned one-piece heat dissipation fin is connected on the outer side wall surface of the aluminum pipe after being connected by silica gel adhesion solidification, the material of the aforementioned heat dissipation fin can be aluminum or copper, in one specific embodiment, the aforementioned heat dissipation structure 2 is formed by aluminum plate stamping bending or injection molding.

[0041] The technical scheme has the advantages that the heat dissipation fins are integrally formed to form the heat dissipation structure 2, compared with the heat dissipation structure in the prior art in which aluminum strips and fins are high-temperature welded, the high-temperature welding process of the traditional aluminum strips and the corrugated aluminum sheets is cancelled, and thus the high-temperature oxides formed by the high-temperature welding do not need to be chemically treated, the production process is simplified, the production cost is reduced, and the pollution to the environment is eliminated under the premise of effectively eliminating the phenomenon of white powder being blown out by the air conditioner.

[0042] In some embodiments, the PTC heater 10 is located in a region between the air outlet side of the indoor heat exchanger and the air inlet side of the indoor fan.

[0043] In the technical scheme, the PTC heater 10 is arranged in the region between the air outlet side of the indoor heat exchanger and the air inlet side of the indoor fan, so that the air outlet of the indoor heat exchanger can be warmed up again when the PTC heater 10 is running, and the air is further mixed in the indoor fan, thereby ensuring the uniformity of the hot air supply of the air conditioner.

[0044] Specifically referring to Figure 3 In some embodiments, the heat dissipation fins include a plurality of heat dissipation units 20 arranged at intervals along the length direction of the heating core 1, each heat dissipation unit 20 includes a first segment 21 connected to the outer wall surface of the heating core 1, each first segment 21 has a second segment 22 extending away from one side of the heating core 1 at both ends of the length of the first segment 21, one end of each second segment 22 away from the first segment 21 is an outer end, one end of each second segment 22 connected to the first segment 21 is an inner end, and the interval between the two second segments 22 in each heat dissipation unit 20 becomes smaller from the inner end to the outer end, and the third segment 23 connects adjacent two heat dissipation units 20 into one body, and the third segment 23 is connected to the outer end of the second segment 22.

[0045] In the technical scheme, the two second segments 22 at both ends of the same first segment 21 have an interval that becomes smaller from the inner end to the outer end, so that the heat dissipation structure 2 forms a generally triangular structure as a whole, and the base of the triangular heat dissipation structure 2 is connected to the heating core 1, having a larger contact area, which on the one hand enables the heat dissipation structure 2 and the heating core 1 to have a larger matching connection surface, thereby ensuring a larger connection strength therebetween, preventing the connection between the heat dissipation structure 2 and the heating core 1 from cracking due to air flow disturbance, and being suitable for higher speed indoor fan working conditions, and on the other hand enables the heat dissipation structure 2 to form a larger heat exchange and heat conduction area with the heating core 1, improving the heating and heat exchange effect of the heat dissipation structure 2 on the flowing air.

[0046] In a specific embodiment, the first segments 21 are arranged at equal intervals along the length direction of the heat-generating core 1, and the first segment 21 and the second segments 22 at both ends thereof jointly enclose a flow area in the shape of an isosceles trapezoid or an isosceles triangle, in which case the base of the isosceles trapezoid or the isosceles triangle, i.e., the first segment 21, is parallel to the third segment 23, and the lengths of the two are equal, thus achieving a simple and compact structure.

[0047] 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-generating core 1 can be increased as space permits, in which case, preferably, a first reinforcing rib 221 can be formed on the second segment 22, extending from the inner end to the outer end of the second segment 22, so as to increase the structural strength of the second segment 22 and prevent the flexible cantilever structure from being too flexible and unstable. 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 is subject to shaking under the impact of the airflow generated by the indoor fan, which will cause the two adjacent second segments 22 to collide at the outer end position, thus generating noise and causing the risk of damage to the fins. To address the above problems, 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, i.e., a spacing is provided between the two adjacent third segments 23, which can prevent the two adjacent second segments 22 or third segments 23 from colliding with each other under the impact of the airflow, and can also increase the flow area of the heat dissipation structure 2 and further improve the heat exchange effect. It can be understood that the flow gap 25 can also prevent the thermal expansion and contraction of the heat dissipation fins from causing abnormal noise due to the contact and friction between the adjacent second segments 22 and third segments 23.

[0049] In a specific embodiment, the width of the flow gap 25 is b, and 0.1mm≤b≤5mm. In the case of a large thickness of the heat dissipation fins, the flow gap 25 can be relatively small, which can facilitate the integrated molding of the heat dissipation fins.

[0050] For a better understanding of the present application, specific reference will be made to the following embodiments: Figure 8As shown, the foregoing technology in the present application, the heat dissipation structure 2 adopts a triangular layout (also known as the aforementioned isosceles trapezoidal layout), more space is left in the middle of the triangle, which can make more airflow flow through the fins, the overall temperature of the airflow is slow, which can fully exchange heat with the whole row of fins, and the first reinforcing rib 221 is designed on the side of the fin, which increases the heat exchange area and improves the heat exchange efficiency, the airflow passing through the distal edge of the fin and the electric auxiliary heating outside also exchanges heat, the heat exchange area is further increased, the overall gap is larger, the flow resistance is smaller, and the influence on the air volume of the whole machine is smaller.

[0051] In one specific embodiment, in combination with Figure 6 and Figure 7 As shown, the base angle α of the triangular heat dissipation structure (also known as the base angle of the isosceles trapezoid) is 30°-90°, the length of the base a is 2-6mm, the thickness d is 0.15-0.4mm, and the height h of the triangular heat dissipation structure is 5-20mm. The length L of the isosceles plane (also known as the width of the second segment 22) is 10-30mm, the punch reinforcing rib (also known as the first reinforcing rib 221) is inwardly protruding (also known as protruding in the direction of the second segment 22 towards the other end of the same first segment 21), the number and spacing f of the punch reinforcing rib are not limited, the length n and width m of the punch reinforcing rib are not limited, and the punch reinforcing rib can be arranged in vertical or horizontal parallel arrangement, or in any direction staggered arrangement.

[0052] In combination with Figures 9 to 11 As shown, in another possible implementation, the flow gap 25 is provided with a buffer spacer 3, specifically, when the flow gap 25 is small, the buffer spacer 3 can be formed by point gluing (such as silicone) at the position of the flow gap, which is simple and reliable in process; when the flow gap 25 is large, a corresponding buffer spacer 3 can be separately provided to achieve the same.

[0053] In this technical scheme, by providing the buffer spacer 3 in the flow gap 25, the position stability of the outer end of the second segment 22 and the corresponding third segment 23 can be improved, the risk of deformation of the second segment 22 and the third segment 23 exerting force on the first segment 21 to cause the connection between the first segment 21 and the heating core 1 to crack can be prevented, and in addition, it can be understood that the phenomenon of displacement of the second segment 22 and the third segment 23 caused by impact of the PTC heater during transportation and handling can also be prevented.

[0054] In one specific embodiment, the material of the buffer spacer 3 is rubber, which has high buffering effect and low manufacturing cost.

[0055] In combination with Figure 11As shown, in some embodiments, the buffer spacer 3 comprises a buffer column 31, and the connecting position of the second segment 22 and the third segment 23 is a connecting corner 24. Figure 3 As indicated above, in one specific embodiment, the cross section of the buffer column 31 is isosceles trapezoidal, so as to be able to match the shape of the inclined position of the two connecting corners 24, thereby forming reliable support, and the 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 on each second segment 22 protrudes towards the side of the flow gap 25 close to the second segment 22, and the inner end surface of the buffer column 31, i.e. the end surface towards the side of the heating core 1, is supported on the second reinforcing rib 222, i.e. the two protruding second reinforcing ribs 222 on both sides are supported on the inner end surface of the buffer column 31.

[0056] In this technical solution, on the one hand, the buffer column 31 with isosceles trapezoidal cross section is arranged in the flow gap 25 to achieve reliable buffering and support of the second segments 22 on both sides, and on the other hand, the protruding second reinforcing rib 222 is arranged at the outer end position of the two second segments 22 close to each other, so as to further improve the structural strength and heat exchange area of the second segment 22, and meanwhile, reliable limiting of the buffer column 31 is achieved, and the mounting structure of the buffer column 31 is simple and compact.

[0057] In some embodiments, the buffer spacer 3 further comprises an outer positioning beam 32 connected to the side of the buffer column 31 away from the first segment 21, so as to form a limiting groove 33 matching the shape of the connecting corner 24 on both sides of the buffer spacer 3.

[0058] In this technical solution, the outer positioning beam 32 is arranged on the outer side of the buffer column 31, so that the limiting groove 33 matching the connecting corner 24 is formed on both sides of the buffer spacer 3, and in the specific assembly, the buffer spacer 3 can be slidably inserted from both ends of the flow gap 25, so that 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 with the second segment 22 and / or the third segment 23.

[0060] In other feasible embodiments, a plurality of buffer spacers 3 are arranged in the same flow gap 25, and the buffer spacers 3 are arranged at intervals along the width direction of the heating core 1.

[0061] In the technical scheme, the multiple buffering spacers 3 are arranged in the same flow gap 25, which can realize the damping vibration of the second segments 22 on the two sides at multiple points in the width direction and reduce the shielding of the flow area of the flow gap 25.

[0062] Those skilled in the art can understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0063] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be considered as the protection scope of the present application.

Claims

1. An air conditioner having a PTC heater, characterized by comprising: The PTC heater (10) comprises a heating core (1) and a heat dissipation structure (2) connected to the heating core (1), and the heat dissipation structure (2) is an integrally formed heat dissipation fin.

2. The air conditioner of claim 1, wherein Further comprising 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 by The heat dissipation fin comprises a plurality of heat dissipation units (20) arranged at intervals along the length direction of the heating core (1), each of the heat dissipation units (20) comprises a first segment (21) connected to the outer wall surface of the heating core (1), each of the first segments (21) has a second segment (22) extending away from one side of the heating core (1) at the lengthwise ends, 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 distance between the two second segments (22) in each of the heat dissipation units (20) gradually decreases from the inner end to the outer end, and the third segment (23) connects the adjacent two heat dissipation units (20) into one body, and the third segment (23) is connected to the outer end of the second segment (22).

4. The air conditioner of claim 3, wherein Each of the first segments (21) and the second segments (22) at the two ends thereof jointly enclose a flow area; and / or, the second segment (22) is provided with a first reinforcing rib (221) extending from the inner end to the outer end thereof.

5. The air conditioner of claim 3, wherein The outer ends of the two second segments (22) in the same heat dissipation unit (20) form a flow gap (25) therebetween.

6. The air conditioner of claim 5, wherein The width of the flow gap (25) is b, and 0.1mm≤b≤5mm.

7. The air conditioner of claim 5, wherein The flow gap (25) is provided with a buffer spacer (3).

8. The air conditioner of claim 7, wherein The buffer spacer (3) comprises a buffer column (31), the connection position of the second segment (22) and the third segment (23) is a connection corner (24), the second segment (22) is further provided with a second reinforcing rib (222) extending along the width direction of the heating core (1), and the second reinforcing rib (222) on each of the second segments (22) protrudes towards the side of the flow gap (25) close to the second segment (22), and the end face of the buffer column (31) towards the side of 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 of claim 8, wherein The buffer spacer (3) further comprises an outer positioning cross beam (32) connected to the side of the buffer column (31) away from the first segment (21) to form a limiting groove (33) matching the shape of the connection corner (24) on both sides of the buffer spacer (3).

10. The air conditioner of claim 7, wherein The buffer spacer (3) is bonded with the second segment (22) and / or the third segment (23); and / or, multiple buffer spacers (3) are arranged in the same flow gap (25), and the buffer spacers (3) are arranged along the width direction of the heat core (1).

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