Heat exchanger and air conditioner

Abstract

The utility model relates to the technical field of air conditioners and discloses a heat exchanger. The heat exchanger comprises a heat exchange tube and fins, and the surface of the heat exchange tube comprises a first surface; the fins are arranged on the first surface; the surfaces, facing the heat exchange tubes, of the fins and / or the first surfaces are provided with drainage channels, the maximum size, perpendicular to the first surfaces, of the drainage channels is h, and the maximum size, parallel to the first surfaces, of the drainage channels is d. Wherein 1mm < = h < = 4mm and / or 1mm < = d < = 4mm. The surfaces, facing the heat exchange pipes, of the fins and / or the first surfaces are provided with drainage channels, and the drainage efficiency of condensate water can be improved. The maximum size h, perpendicular to the first surface, of the drainage channel is limited to be larger than or equal to 1 mm and smaller than or equal to 4 mm, and / or the maximum size d, parallel to the first surface, of the drainage channel is limited to be larger than or equal to 1 mm and smaller than or equal to 4 mm, it can be guaranteed that the heat exchange amount and the wind resistance of the heat exchanger are within the optimal range while the condensate water drainage efficiency is improved, and the drainage efficiency, the heat exchange amount and the wind resistance are considered. The utility model further discloses the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a heat exchanger and an air conditioner. Background Art

[0002] The microchannel heat exchanger is used as an outdoor evaporator for heating. When the ambient temperature is low, as the system runs, condensed water will precipitate on the fins and heat exchange tubes of the microchannel heat exchanger. The continuous accumulation of condensed water will affect the heat exchange effect between the refrigerant and the air. At present, the drainage method of the microchannel heat exchanger is generally achieved by setting a window structure on the fins. The window direction is perpendicular to the heat exchange tube and the air inlet direction. The condensed water generally starts to condense from the microchannel heat exchange tube. The window structure is not conducive to the rapid discharge of condensed water.

[0003] The related technology provides a microchannel heat exchanger with drainage function, including a header, microchannel flat tubes and fins. The microchannel flat tubes are connected to the header and communicate with the header. Multiple fins are arranged in parallel on the microchannel flat tubes. Each fin is provided with a drainage hole, and the drainage holes on each fin penetrate each other.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The related technology removes condensation water or defrost water on the microchannel heat exchanger in time by setting drainage holes on the fins. However, the parameters of the drainage holes not only affect drainage, but also affect some other performances of the heat exchanger. Therefore, it is not enough to just set the drainage holes, and the parameters of the drainage holes need to be studied.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a heat exchanger and an air conditioner, which improve the condensed water discharge efficiency while ensuring sufficient contact area between the heat exchange tubes and the fins.

[0009] According to a first aspect of an embodiment of the utility model, a heat exchanger is provided, comprising: a heat exchange tube, the surface of the heat exchange tube comprising a first surface; a fin, arranged on the first surface; wherein the surface of the fin facing the heat exchange tube and / or the first surface is provided with a drainage channel, the maximum dimension of the drainage channel perpendicular to the first surface is h, and the maximum dimension of the drainage channel parallel to the first surface is d; wherein 1mm≤h≤4mm and / or 1mm≤d≤4mm.

[0010] A drainage channel is provided on the surface of the fin facing the heat exchange tube and / or the first surface, so that the condensed water is discharged from between the fin and the first surface of the heat exchange tube, which can improve the discharge efficiency of the condensed water. The limitation of 1mm≤h≤4mm and / or 1mm≤d≤4mm can improve the condensed water discharge efficiency while ensuring that the heat exchange capacity and wind resistance of the heat exchanger are within a better range, taking into account the drainage efficiency, heat exchange capacity and wind resistance, so that the heat exchanger is in a better state.

[0011] Optionally, 2mm≤h≤4mm and / or 2mm≤d≤4mm.

[0012] Further limiting the size of the drainage channel to 2 mm ≤ h ≤ 4 mm and / or 2 mm ≤ d ≤ 4 mm can make drainage more efficient while maintaining the heat exchange efficiency of the heat exchanger, thereby improving the overall performance of the heat exchanger.

[0013] Optionally, when a drainage channel is provided on the heat exchange tube, δ<h<H-δ, wherein δ is the wall thickness of the microchannel on the heat exchange tube, H is the thickness of the heat exchange tube, and the thickness direction of the heat exchange tube is perpendicular to the first surface.

[0014] By limiting the size of the drainage channel on the heat exchange tube to within the range of δ<h<H-δ, the drainage efficiency can be improved while maintaining the structural strength of the heat exchange tube.

[0015] Optionally, a cross section of the drainage channel cut by a plane perpendicular to the first surface includes at least one of a rectangular segment, an arc segment, and a triangular segment.

[0016] The drainage channel adopts different cross-sectional shapes to provide diverse flow paths for condensed water, thereby improving drainage efficiency.

[0017] Optionally, the drainage channel is formed by a denting process, or by a grooving process.

[0018] When the drainage channel is formed by the concave pressing process, the heat exchange area of ​​the heat exchange tube or fin can be maintained, avoiding or reducing the impact on the heat exchange effect. When the drainage channel is formed by the grooving process, the size of the drainage channel can be accurately controlled through the grooving process, thereby improving the manufacturing accuracy of the drainage channel.

[0019] Optionally, the surface of the heat exchange tube further includes: a second surface arranged opposite to the first surface; both the first surface and the second surface are provided with drainage channels, and the drainage channels of the first surface correspond to or are staggered with the drainage channels of the second surface.

[0020] Drainage channels are provided on both the first and second surfaces of the heat exchange tube, which can provide more drainage paths and improve drainage efficiency. When the drainage channels on the first surface correspond to the drainage channels on the second surface, a synergistic effect can be formed, so that condensed water flows smoothly between the first surface and the second surface and is discharged. When the drainage channels on the first surface and the drainage channels on the second surface are staggered, the strength loss of the heat exchange tube caused by the opening of the drainage channels can be reduced.

[0021] Optionally, the drainage channels on the fins are arranged correspondingly or staggered with the drainage channels on the heat exchange tubes; and / or the number of the drainage channels on the fins is equal to or unequal to the number of the drainage channels on the heat exchange tubes.

[0022] When the drainage channels on the fins are arranged correspondingly to the drainage channels on the heat exchange tubes, a drainage path with a larger drainage space can be formed, thereby improving drainage efficiency. When the drainage channels on the fins are arranged staggered with the drainage channels on the heat exchange tubes, the discharge points of the condensed water can be dispersed and the flow direction of the condensed water can be optimized. When the number of drainage channels on the fins is equal to the number of drainage channels on the heat exchange tubes, a balanced drainage method can be provided so that the condensed water can be evenly discharged from the fins and the heat exchange tubes. The number of drainage channels of the heat exchange tubes or fins can also be set according to the amount of condensed water generated on the heat exchange tubes or fins, and the number of drainage channels on the fins and the number of drainage channels on the heat exchange tubes can be set to be unequal.

[0023] Optionally, there are multiple heat exchange tubes, and the multiple heat exchange tubes include: a first heat exchange tube; a second heat exchange tube, which is arranged opposite to the first heat exchange tube, and the fin is arranged between the first heat exchange tube and the second heat exchange tube; a first drainage channel is provided on the first surface of the first heat exchange tube and / or the surface of the fin facing the first heat exchange tube, and a second drainage channel is provided on the first surface of the second heat exchange tube and / or the surface of the fin facing the second heat exchange tube, and the first drainage channel corresponds to or is staggered with the second drainage channel, wherein the drainage channel includes the first drainage channel and the second drainage channel.

[0024] The first drainage channel corresponds to or is staggered with the second drainage channel, which can coordinate the drainage effect of the condensed water generated outside the first heat exchange tube, the second heat exchange tube and the fin, and improve the drainage efficiency.

[0025] Optionally, the heat exchange tube includes: a first tube portion; a second tube portion, which is arranged in sequence with the first tube portion in a direction perpendicular to the first surface, and the first tube portion and the second tube portion are spliced ​​to jointly define a microchannel; wherein the drainage channel is arranged in the first tube portion, or the drainage channel is arranged in the second tube portion, or the first tube portion is provided with a first sub-drainage channel running through it, and the second tube portion is provided with a second sub-drainage channel on the surface facing the first tube portion, and the first sub-drainage channel and the second sub-drainage channel are spliced ​​to form a drainage channel.

[0026] Drainage pipes can be arranged at different positions according to actual needs. The drainage channel can be arranged only in the first pipe part, or only in the second pipe part. The drainage channel can also be composed of a first sub-drainage channel arranged in the first pipe part and a second sub-drainage channel arranged in the second pipe part.

[0027] According to a second aspect of an embodiment of the utility model, an air conditioner is provided, characterized in that it comprises a heat exchanger as described in any one of the above embodiments.

[0028] The air conditioner provided by the embodiment of the present disclosure includes the heat exchanger described in any one of the above disclosed embodiments, and thus has all the beneficial effects of the heat exchanger described in any one of the above disclosed embodiments, which will not be repeated here.

[0029] The heat exchanger and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0030] The surface of the fin facing the heat exchange tube and / or the first surface is provided with a drainage channel, which can improve the discharge efficiency of condensed water. The maximum dimension h of the drainage channel perpendicular to the first surface is limited to 1mm≤h≤4mm, and / or the maximum dimension d of the drainage channel parallel to the first surface is limited to 1mm≤d≤4mm, both of which can improve the condensed water discharge efficiency while ensuring that there is sufficient heat exchange contact area between the heat exchange tube and the fin, thereby enhancing the heat exchange performance of the heat exchanger and improving the heat exchange effect.

[0031] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0033] Figure 1 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided on a fin;

[0034] Figure 2is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided on a fin;

[0035] Figure 3 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein the drainage channel is provided on the fin, and the dotted line indicates the fin;

[0036] Figure 4 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein the drainage channel is provided on the fin, and the dotted line indicates the fin;

[0037] Figure 5 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein the drainage channel is provided on the fin, and the dotted line indicates the fin;

[0038] Figure 6 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided in a heat exchange tube;

[0039] Figure 7 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided in a heat exchange tube, and a dotted line indicates a fin;

[0040] Figure 8 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided in a heat exchange tube, and a dotted line indicates a fin;

[0041] Fig. 9 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided in a heat exchange tube, and a dotted line indicates a fin;

[0042] Fig.10 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided in a heat exchange tube, and a dotted line indicates a fin;

[0043] Fig.11 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein a drainage channel is provided on the heat exchange tube and the fin;

[0044] Fig.12 is a schematic diagram of the structure of another heat exchanger provided by an embodiment of the present disclosure, wherein the drainage channel is provided in the heat exchange tube and the fin, and the dotted line indicates the fin;

[0045] Fig.13 is a curve diagram showing the relationship between the displacement and h(d) of a heat exchanger provided in an embodiment of the present disclosure;

[0046] Fig.14is a curve diagram showing the relationship between the heat transfer capacity and h(d) of a heat exchanger provided by an embodiment of the present disclosure;

[0047] Fig.15 It is a curve diagram showing the relationship between the wind resistance and h(d) of a heat exchanger provided in an embodiment of the present disclosure.

[0048] Reference numerals:

[0049] 10: heat exchange tube; 11: first surface; 12: second surface; 13: first heat exchange tube; 14: second heat exchange tube; 15: first tube portion; 16: second tube portion; 17: microchannel;

[0050] 20: fin;

[0051] 30: drainage channel; 31: first drainage channel; 32: second drainage channel; 33: first sub-drainage channel; 34: second sub-drainage channel. DETAILED DESCRIPTION

[0052] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0053] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate for the disclosed embodiments described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0055] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0056] Unless otherwise stated, the term "plurality" means two or more.

[0057] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0058] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A, or B, or, A and B.

[0059] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0060] The microchannel heat exchanger is a highly efficient heat exchange device that enhances heat exchange performance through microchannels 17. The heat exchange tube 10 is the main body of the microchannel heat exchanger. The heat exchange tube 10 is provided with microchannels 17 inside. The refrigerant flows in the microchannels 17 to exchange heat with the external environment. Fins 20 are usually provided outside the heat exchange tube 10 to increase the heat exchange area and improve the heat exchange efficiency.

[0061] Combination Figure 1-12 As shown, the embodiment of the present disclosure provides a heat exchanger, including a heat exchange tube 10 and a fin 20. Figure 1-3 As shown, the surface of the heat exchange tube 10 includes a first surface 11; the fin 20 is arranged on the first surface 11; wherein, the surface of the fin 20 facing the heat exchange tube 10 and / or the first surface 11 is provided with a drainage channel 30, and the maximum dimension of the drainage channel 30 perpendicular to the first surface 11 is h, and the maximum dimension parallel to the first surface 11 is d; wherein 1mm≤h≤4mm and / or 1mm≤d≤4mm, for example, h is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm or 4mm, and d is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm or 4mm.

[0062] Combination Figure 1-12 As shown, when the heat exchanger is used as an air conditioner outdoor unit evaporator for heating, air enters the heat exchanger through the Z-axis direction, the gravity direction is parallel to the Y-axis direction, and the X-axis is perpendicular to the first surface 11 of the heat exchanger.

[0063] Combination Figure 3-5 , Figure 7-10 and Fig.12 As shown, in order to facilitate the structural display of the heat exchanger, the fin 20 is illustrated with a dotted outline.

[0064] Combination Figure 2-5 As shown, the drainage channel 30 may be provided on the surface of the fin 20 facing the heat exchange tube 10. Figure 6-10 As shown, the drainage channel 30 can also be provided on the first surface 11. Figure 11-12 As shown, the drainage channel 30 may also be provided on the surface of the fin 20 facing the heat exchange tube 10 and also on the first surface 11 .

[0065] By providing a drainage channel 30 on the surface of the fin 20 facing the heat exchange tube 10, or providing a drainage channel 30 on the first surface 11, the condensed water is discharged from between the fin 20 and the first surface 11 of the heat exchange tube 10 along the gravity direction, which can reduce the resistance of the fin 20 to the water flow, so that the condensed water flows smoothly during the discharge process. At the same time, the first surface 11 can also play a drainage role, which can effectively improve the discharge efficiency of the condensed water and reduce the accumulation of water on the fin 20, thereby avoiding the reduction of heat exchange efficiency due to water accumulation. When the drainage channel 30 is provided on both the surface of the fin 20 facing the heat exchange tube 10 and the first surface 11, more drainage paths can be provided, thereby improving the discharge efficiency of the condensed water.

[0066] The condensed water droplets can adhere to the surface of the heat exchange tube or fin due to surface tension. For a water droplet with a contact surface length of L, the surface tension of the water droplet is:

[0067] F=σL

[0068] The gravity of the water droplet itself is:

[0069] G=ρVg

[0070] Where σ is the surface tension coefficient, the surface tension coefficient of water at room temperature is about 0.0728N / m; ρ is the density of water, the density of water is 1Kg / m 3 ; V is the volume of the water drop (m 3 );g is the gravitational constant, which is 9.8N / Kg.

[0071] For a hemispherical water droplet, the force analysis in the gravity direction can be expressed as:

[0072] 2πrσ=2 / 3πr 3 ρg

[0073] From this, the radius of the hemispherical water droplet can be obtained as:

[0074] r=(3σ / ρg)^0.5

[0075] For different hydrophilic and hydrophobic surfaces, for example, the drainage channel is provided in the heat exchanger and the first surface of the heat exchanger is provided with a hydrophobic coating. Different hydrophobic coatings will result in different contact angles between the water droplet and the first surface, so the water droplet presents different shapes. For different shapes, the diameter of a hemispherical water droplet and the characteristic length under its size can be obtained. In order to allow the water droplet to be better discharged through the drainage channel, the maximum dimension h of the drainage channel perpendicular to the first surface and the maximum dimension d of the drainage channel parallel to the first surface should be as large as possible from the diameter of the water droplet and the characteristic length under its size. According to calculations, in this embodiment, d and / or h are greater than or equal to 2 mm.

[0076] Considering that the surfaces of the heat exchange tubes 10 and the fins 20 are usually provided with a hydrophobic coating to form a hydrophobic surface, the contact angle of the condensed water droplets on the surface is increased, the adhesion of the water droplets on the surface is reduced, and the water droplets can fall off and be discharged from the surface when they are small, thereby reducing the aggregation of water droplets on the surface. Therefore, d and / or h are limited to be greater than or equal to 1 mm.

[0077] In order to further determine the numerical range of h and d, the embodiment of the present disclosure sets a drainage channel 30 on the fin through a denting process, and the h and d sizes of the drainage channel 30 are set to the same size. The fins 20 with drainage channels 30 of different h (d) sizes are assembled on the heat exchanger, and the heat exchange capacity, drainage volume, and wind resistance parameters of the heat exchanger are simulated and calculated. The simulation calculation data are shown in Table 1 below.

[0078] Table 1

[0079]

[0080] Combination Fig.13 As shown, as the h(d) size of the drainage channel 30 increases, the drainage volume of the heat exchanger increases first and then tends to be flat. When the h(d) size of the drainage channel 30 is greater than or equal to 2 mm and less than or equal to 3.25 mm, since the larger drainage channel 30 allows more water to flow through, the drainage volume gradually increases as the h(d) size of the drainage channel 30 increases. When the h(d) size of the drainage channel 30 is greater than 3.25 mm, the flow rate of the condensed water approaches or reaches the maximum value, and further increasing the size of the drainage channel 30 will not significantly increase the flow rate, and thus the drainage volume will not increase significantly, so that the drainage volume tends to be flat. Wherein, h(d) represents h and / or d.

[0081] Combination Fig.14As shown, as the h(d) size of the drainage channel 30 increases, the heat exchange of the heat exchanger shows a trend of first increasing and then decreasing. When the h(d) size of the drainage channel 30 is greater than or equal to 2 mm and less than or equal to 3.25 mm, since a larger drainage channel 30 can improve drainage efficiency, the heat exchange gradually increases as the h(d) size of the drainage channel 30 increases. When the h(d) size of the drainage channel 30 is greater than 3.25 mm, as the h(d) size of the drainage channel 30 increases, the drainage volume tends to be flat, and the heat exchange contact area between the heat exchanger and the fin 20 gradually decreases, which reduces the heat exchange performance, and thus the heat exchange gradually decreases.

[0082] Combination Fig.15 As shown in the figure, as the h(d) dimension of the drainage channel 30 increases, the wind resistance of the heat exchanger increases. When the h(d) dimension of the drainage channel 30 is greater than or equal to 2 mm and less than or equal to 3.25 mm, as the h(d) dimension of the drainage channel 30 increases, the wind resistance increases slowly. When the h(d) dimension of the drainage channel 30 is greater than 3.25 mm, as the h(d) dimension of the drainage channel 30 increases, the wind resistance increases significantly.

[0083] Taking into account factors such as processing errors, and combining the heat exchange capacity, displacement, wind resistance and other performance parameters of the heat exchanger, a comprehensive analysis shows that d and h should be less than or equal to 4mm.

[0084] The disclosed embodiment limits h(d) to 1mm≤h≤4mm, which can improve the condensate discharge efficiency outside the heat exchanger while ensuring sufficient heat exchange contact area between the heat exchange tube 10 and the fin 20, thereby enhancing the heat exchange performance of the heat exchanger and improving the heat exchange effect.

[0085] When the drainage channel 30 is disposed on the first surface 11 of the heat exchange tube 10 , the limitation of 1 mm≤h≤4 mm can also avoid affecting the arrangement of the microchannel 17 in the heat exchange tube 10 .

[0086] In the heat exchanger provided by the embodiment of the present disclosure, the surface of the fin 20 facing the heat exchange tube 10 and / or the first surface 11 is provided with a drainage channel 30, which can improve the discharge efficiency of condensed water. The maximum dimension h of the drainage channel 30 perpendicular to the first surface 11 is limited to 1mm≤h≤4mm, and / or the maximum dimension d of the drainage channel 30 parallel to the first surface 11 is limited to 1mm≤d≤4mm, both of which can improve the condensed water discharge efficiency while ensuring that there is sufficient heat exchange contact area between the heat exchange tube 10 and the fin 20, thereby enhancing the heat exchange performance of the heat exchanger and improving the heat exchange effect.

[0087] Optionally, combined Figure 1-2As shown, there are multiple fins 20, and the multiple fins 20 are arranged in sequence along the gravity direction. The multiple fins 20 are arranged in sequence along the gravity direction, and the drainage channels 30 arranged on the surface of the fins 20 facing the heat exchange tube 10 and / or the first surface 11 form a drainage channel 30 structure from top to bottom, which can quickly drain condensed water.

[0088] Optionally, 2mm≤h≤4mm and / or 2mm≤d≤4mm.

[0089] The disclosed embodiment further limits the h and d dimensions of the drainage channel 30 to 2mm≤h≤4mm and / or 2mm≤d≤4mm, which can make drainage more efficient while maintaining the heat exchange efficiency of the heat exchanger, thereby improving the overall performance of the heat exchanger.

[0090] Optionally, combined Figure 7-9 As shown, when the heat exchange tube 10 is provided with a drainage channel 30, δ<h<H-δ, wherein δ is the wall thickness of the microchannel 17 on the heat exchange tube 10, H is the thickness of the heat exchange tube 10, and the thickness direction of the heat exchange tube 10 is perpendicular to the first surface 11.

[0091] When the heat exchange tube 10 is provided with the drainage channel 30 , h<H−δ, and the structural integrity and mechanical strength of the heat exchange tube 10 can be maintained.

[0092] When the heat exchange tube 10 is provided with a drainage channel 30, h>δ, so that the drainage space of the drainage channel 30 is large enough, thereby improving the drainage capacity. At the same time, the smaller wall thickness δ of the microchannel 17 on the heat exchange tube 10 can also reduce thermal resistance and improve heat exchange efficiency.

[0093] In the embodiment of the present disclosure, the size of the drainage channel 30 on the heat exchange tube 10 is limited to the range of δ<h<H-δ, which can improve the drainage efficiency while maintaining the structural strength of the heat exchange tube 10.

[0094] Optionally, 0.5H<h<H-δ.

[0095] The embodiment of the present disclosure increases the lower limit of h from δ to 0.5H, so that the size of the drainage channel 30 is at least half the thickness of the heat exchange tube 10, which can provide a larger drainage space, thereby enhancing the drainage capacity. h>0.5H can also reduce the production difficulty. It has been verified that when 0.5H<h<H-δ, the production difficulty and drainage effect of the drainage channel 30 can achieve a better balance.

[0096] Optionally, combined Figure 3-5 , Figure 7 and Fig.10 As shown, a cross section of the drainage channel 30 obtained by a plane perpendicular to the first surface 11 includes at least one of a rectangular segment, an arc segment, and a triangular segment.

[0097] The cross-section of the drainage channel 30 can be in different cross-sectional shapes such as rectangular, arc-shaped or triangular. The drainage channel 30 adopts different cross-sectional shapes to provide diverse flow paths for condensed water, thereby improving drainage efficiency.

[0098] The present application does not limit the shape of the drainage channel 30 , and the cross section of the drainage channel 30 obtained by a plane perpendicular to the first surface 11 may also be a circular segment, a star-shaped segment, etc.

[0099] Optionally, combined Figure 1 As shown, the drainage channel 30 is formed by a denting process.

[0100] The drainage channel 30 is formed by a concave pressing process, and can form a continuous surface on the first surface 11 of the heat exchange tube 10 or on the surface of the fin 20 facing the heat exchange tube 10, which can avoid or reduce the impact on the structural strength of the heat exchanger. At the same time, the heat exchange area of ​​the heat exchange tube 10 or the fin 20 can be maintained, which can avoid or reduce the impact on the heat exchange effect.

[0101] Optionally, the drainage channel 30 is formed by a grooving process.

[0102] The size of the drainage channel 30 can be accurately controlled through the grooving process, thereby improving the manufacturing accuracy of the drainage channel 30 .

[0103] Optionally, combined Figure 8-9 As shown, the surface of the heat exchange tube 10 also includes a second surface 12, which is arranged opposite to the first surface 11; both the first surface 11 and the second surface 12 are provided with drainage channels 30, and the drainage channels 30 of the first surface 11 and the drainage channels 30 of the second surface 12 correspond to or are staggered.

[0104] The drainage channels 30 are disposed on both the first surface 11 and the second surface 12 of the heat exchange tube 10 , which can provide more drainage paths, improve drainage efficiency, reduce accumulation on the heat exchanger surface, and thus improve heat exchange efficiency.

[0105] like Fig. 9 As shown, when the drainage channel 30 of the first surface 11 corresponds to the drainage channel 30 of the second surface 12, that is, along the direction perpendicular to the first surface 11 of the heat exchanger, a drainage channel 30 of the first surface 11 and a drainage channel 30 of the second surface 12 are arranged in a collinear manner. The drainage channel 30 of the first surface 11 and the drainage channel 30 of the second surface 12 can form a synergistic effect, so that the condensed water flows smoothly between the first surface 11 and the second surface 12 and is discharged.

[0106] like Figure 8As shown, when the drainage channel 30 on the first surface 11 and the drainage channel 30 on the second surface 12 are staggered, that is, along the direction perpendicular to the first surface 11 of the heat exchanger, the drainage channel 30 on the first surface 11 and the drainage channel 30 on the second surface 12 are not arranged in a colinear manner. This can reduce the strength loss of the heat exchange tube 10 caused by the opening of the drainage channel 30, and at the same time can reduce the concentration of drainage points and disperse the drainage pressure.

[0107] Optionally, combined Figure 11-12 As shown, the drainage channel 30 on the fin 20 is arranged corresponding to or staggered with the drainage channel 30 on the heat exchange tube 10 .

[0108] When the drainage channel 30 on the fin 20 is arranged corresponding to the drainage channel 30 on the heat exchange tube 10, that is, along the direction perpendicular to the first surface 11 of the heat exchanger, a drainage channel 30 on the fin 20 and a drainage channel 30 on the heat exchange tube 10 are arranged in a collinear manner, so that the drainage channel 30 on the fin 20 is communicated with the drainage channel 30 on the heat exchange tube 10, thereby forming a drainage path with a larger drainage space, reducing flow resistance, and thus improving drainage efficiency.

[0109] When the drainage channels 30 on the fins 20 and the drainage channels 30 on the heat exchange tubes 10 are staggered, that is, along the direction perpendicular to the first surface 11 of the heat exchanger, the drainage channels 30 on the fins 20 and the drainage channels 30 on the heat exchange tubes 10 are not arranged in a colinear manner. In this way, the discharge points of the condensed water can be dispersed, the load of a single drainage point can be reduced, the flow direction of the condensed water can be optimized, and the drainage speed can be accelerated.

[0110] Optionally, the number of the drainage channels 30 on the fin 20 is equal to or unequal to the number of the drainage channels 30 on the heat exchange tube 10 .

[0111] The number of drainage channels 30 on the fins 20 and the number of drainage channels 30 on the heat exchange tubes 10 can be equal, which can provide a balanced drainage method so that condensed water can be evenly discharged from the fins 20 and the heat exchange tubes 10. Fig.12 As shown, the number of drainage channels 30 on the fins 20 may not be equal to the number of drainage channels 30 on the heat exchange tubes 10. For example, when the amount of condensed water generated on the fins 20 is greater than the amount of condensed water generated on the heat exchange tubes 10, increasing the number of drainage channels 30 on the fins 20 can reduce the thermal resistance caused by water accumulation on the fins 20, thereby improving the heat exchange performance.

[0112] Optionally, combined Figure 3-7As shown, there are multiple heat exchange tubes 10, and the multiple heat exchange tubes 10 include a first heat exchange tube 13 and a second heat exchange tube 14. The second heat exchange tube 14 is arranged opposite to the first heat exchange tube 13, and the fin 20 is arranged between the first heat exchange tube 13 and the second heat exchange tube 14; the first surface 11 of the first heat exchange tube 13 and / or the surface of the fin 20 facing the first heat exchange tube 13 is provided with a first drainage channel 31, and the first surface 11 of the second heat exchange tube 14 and / or the surface of the fin 20 facing the second heat exchange tube 14 is provided with a second drainage channel 32, the first drainage channel 31 corresponds to or is staggered with the second drainage channel 32, wherein the drainage channel 30 includes a first drainage channel 31 and a second drainage channel 32.

[0113] The microchannel heat exchanger generally includes a first heat exchange tube 13 and a second heat exchange tube 14. The second heat exchange tube 14 is arranged opposite to the first heat exchange tube 13. The fin 20 is arranged between the first heat exchange tube 13 and the second heat exchange tube 14. The fin 20 is located between the first heat exchange tube 13 and the second heat exchange tube 14, which can increase the heat exchange area and thus improve the heat exchange efficiency.

[0114] The first surface 11 of the first heat exchange tube 13 may be provided with a first drainage channel 31, and the surface of the fin 20 facing the first heat exchange tube 13 may also be provided with the first drainage channel 31. The first surface 11 of the second heat exchange tube 14 may be provided with a second drainage channel 32, and the surface of the fin 20 facing the second heat exchange tube 14 may also be provided with a second drainage channel 32. Figure 3-7 As shown, the first drainage channel 31 corresponds to the second drainage channel 32, that is, along the direction perpendicular to the first surface 11 of the heat exchanger, the first drainage channel 31 and the second drainage channel 32 are arranged in a collinear manner. The first drainage channel 31 and the second drainage channel 32 are staggered, that is, along the direction perpendicular to the first surface 11 of the heat exchanger, the first drainage channel 31 and the second drainage channel 32 are not arranged in a collinear manner. The first drainage channel 31 corresponds to or is staggered with the second drainage channel 32, which can coordinate the drainage effect of the condensed water generated outside the first heat exchange tube 13, the second heat exchange tube 14 and the fin 20, and improve the drainage efficiency.

[0115] Optionally, combined Figure 7-8 As shown, the heat exchange tube 10 includes a first tube portion 15 and a second tube portion 16; the second tube portion 16 and the first tube portion 15 are arranged in sequence along a direction perpendicular to the first surface 11, and the first tube portion 15 and the second tube portion 16 are spliced ​​to jointly define a microchannel 17; wherein, the drainage channel 30 is arranged in the first tube portion 15, or, the drainage channel 30 is arranged in the second tube portion 16, or, the first tube portion 15 is provided with a first sub-drainage channel 33 passing through it, and the second tube portion 16 is provided with a second sub-drainage channel 34 on the surface facing the first tube portion 15, and the first sub-drainage channel 33 and the second sub-drainage channel 34 are spliced ​​to form the drainage channel 30.

[0116] The first tube portion 15 and the second tube portion 16 are combined in a direction perpendicular to the first surface 11 to define a microchannel 17. The drainage channel 30 can be provided in the first tube portion 15 so that the condensed water is discharged downward along the first tube portion 15. The drainage channel 30 can also be provided in the second tube portion 16 so that the condensed water is discharged downward along the second tube portion 16. The first tube portion 15 is provided with a first sub-drainage channel 33 running through it, and the surface of the second tube portion 16 facing the first tube portion 15 is provided with a second sub-drainage channel 34. The first sub-drainage channel 33 and the second sub-drainage channel 34 are combined to form the drainage channel 30, which can increase the drainage space of the drainage channel, and can make the condensed water discharged downward along the first tube portion 15 and the second tube portion 16 at the same time. Moreover, since the second sub-drainage channel 34 is provided on the surface of the second tube portion 16 facing the first tube portion 15 and does not run through the second tube portion 16, the structural strength of the heat exchange tube 10 can also be ensured.

[0117] An embodiment of the present disclosure provides an air conditioner, comprising a heat exchanger as described in any one of the above disclosed embodiments.

[0118] The air conditioner provided by the embodiment of the present disclosure includes the heat exchanger described in any one of the above disclosed embodiments, and thus has all the beneficial effects of the heat exchanger described in any one of the above disclosed embodiments, which will not be repeated here.

[0119] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat exchanger, characterized in that: include: A heat exchange tube, wherein the surface of the heat exchange tube includes a first surface; A fin is provided on the first surface; Wherein, a drainage channel is provided on the surface of the fin facing the heat exchange tube and / or the first surface, and the maximum dimension of the drainage channel perpendicular to the first surface is h, and the maximum dimension of the drainage channel parallel to the first surface is d; Among them, 1mm≤h≤4mm and / or 1mm≤d≤4mm.

2. The heat exchanger according to claim 1, characterized in that: 2mm≤h≤4mm and / or 2mm≤d≤4mm.

3. The heat exchanger according to claim 1, characterized in that: When a drainage channel is provided on the heat exchange tube, δ<h<H-δ, wherein δ is the wall thickness of the microchannel on the heat exchange tube, H is the thickness of the heat exchange tube, and the thickness direction of the heat exchange tube is perpendicular to the first surface.

4. The heat exchanger according to claim 1, characterized in that: A cross section of the drainage channel obtained by a plane perpendicular to the first surface includes at least one of a rectangular segment, an arc segment, and a triangular segment.

5. The heat exchanger according to claim 1, characterized in that: The drainage channel is formed by a denting process or a grooving process.

6. The heat exchanger according to any one of claims 1 to 5, characterized in that: The surface of the heat exchange tube also includes: a second surface, disposed opposite to the first surface; The first surface and the second surface are both provided with drainage channels, and the drainage channels of the first surface correspond to or are staggered with the drainage channels of the second surface.

7. The heat exchanger according to any one of claims 1 to 5, characterized in that: The drainage channels on the fins are arranged correspondingly or staggered with the drainage channels on the heat exchange tubes; and / or The number of drainage channels on the fins may be equal to or different from the number of drainage channels on the heat exchange tubes.

8. The heat exchanger according to any one of claims 1 to 5, characterized in that: The number of heat exchange tubes is multiple, and the multiple heat exchange tubes include: a first heat exchange tube; A second heat exchange tube is arranged opposite to the first heat exchange tube, and the fin is arranged between the first heat exchange tube and the second heat exchange tube; A first drainage channel is provided on the first surface of the first heat exchange tube and / or the surface of the fin facing the first heat exchange tube, and a second drainage channel is provided on the first surface of the second heat exchange tube and / or the surface of the fin facing the second heat exchange tube. The first drainage channel corresponds to or is staggered with the second drainage channel, wherein the drainage channel includes the first drainage channel and the second drainage channel.

9. The heat exchanger according to any one of claims 1 to 5, characterized in that: The heat exchange tube includes: a first tube portion; A second tube portion is sequentially arranged with the first tube portion in a direction perpendicular to the first surface, and the first tube portion and the second tube portion are combined to jointly define a microchannel; Among them, the drainage channel is arranged in the first pipe part, or the drainage channel is arranged in the second pipe part, or the first pipe part is provided with a first sub-drainage channel running through it, and the second pipe part is provided with a second sub-drainage channel on the surface facing the first pipe part, and the first sub-drainage channel and the second sub-drainage channel are combined to form the drainage channel.

10. An air conditioner, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.

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