Fin heat exchanger, outdoor unit and air conditioner

Abstract

The utility model relates to air conditioner technical field provides a finned heat exchanger, outdoor unit and air conditioner, wherein, finned heat exchanger includes heat exchange pipe and fin assembly, fin assembly includes a plurality of fins, a plurality of fins are spaced distribution along the axis direction of heat exchange pipe, heat exchange pipe penetrates each fin in turn, the position of fin corresponding fan central region is reinforcing portion, the position of fin corresponding fan edge region is base portion, along the distribution direction of fan and fin assembly, the size of reinforcing portion is greater than the size of base portion. Such setting, the setting of reinforcing portion, the heat exchange area of airflow and fin of fan central region is increased, the heat exchange time of airflow and fin of fan central region is increased, heat exchange is more sufficient, solve the problem that the heat exchanger in relevant technology corresponding fan central region position exists and heat exchange is not sufficient.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a finned heat exchanger, an outdoor unit, and an air conditioner. Background Technology

[0002] In air conditioning systems, the heat exchanger is the core component that enables heat exchange between the refrigerant and the air. Its heat exchange performance directly determines the air conditioner's energy efficiency ratio, cooling capacity, heating capacity, and operational stability. Typically, a heat exchanger consists of multiple heat exchange tubes passing through multiple metal fins, and works in conjunction with a fan to perform forced convection heat exchange. The fan drives air laterally through the gaps between the fins, allowing the air to exchange heat with the heat exchange tubes and fins.

[0003] However, in actual operation, due to the aerodynamic characteristics of fans, especially axial fans, the outlet air velocity exhibits a significant uneven distribution in the radial direction. The air velocity in the central area of ​​the fan is high, with concentrated airflow and strong air penetration; while the air velocity in the edge area is low, with airflow attenuation and flow separation. This uneven air velocity distribution results in a highly uneven airflow field through the heat exchanger. The high-speed airflow in the central area has an excessively fast flow rate and short residence time, preventing sufficient heat exchange between the air and the fins and heat exchange tubes, leading to inadequate heat exchange. In other words, although the flow capacity in this area is strong, the heat exchange efficiency per unit air is low.

[0004] Therefore, how to solve the problem of insufficient heat exchange in the corresponding fan center area of ​​the heat exchanger in the relevant technology has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] This utility model provides a finned heat exchanger, an outdoor unit, and an air conditioner to solve the defect of insufficient heat exchange in the corresponding central area of ​​the fan in the related technology.

[0006] This utility model provides a finned heat exchanger, comprising: Heat exchanger tubes; The fin assembly includes multiple fins, which are spaced apart along the axial direction of the heat exchange tube. The heat exchange tube passes through each fin sequentially. The position of the fin corresponding to the center region of the fan is a reinforcing part, and the position of the fin corresponding to the edge region of the fan is a base part. Along the distribution direction of the fan and the fin assembly, the size of the reinforcing part is larger than the size of the base part.

[0007] This configuration, with its reinforced section, increases the heat exchange area between the airflow and the fins in the central region of the fan, and extends the heat exchange time between the airflow and the fins in the central region of the fan. This results in more thorough heat exchange, improves the heat exchange efficiency per unit air, and solves the problem of insufficient heat exchange in the corresponding central region of the fan in related technologies.

[0008] According to the present invention, a finned heat exchanger is provided, wherein the fan is an axial flow fan, the fin has a reinforcing portion and a pair of base portions, the pair of base portions are distributed at both ends of the reinforcing portion along a reference direction, and the reference direction, the axis of the heat exchange tube, and the distribution direction of the fan and the fin assembly are perpendicular to each other.

[0009] With this configuration, the axial fan's airflow field has the characteristic of high wind speed in the middle region and low wind speed at both ends along the reference direction. The distribution of the reinforcing part and the base of each fin matches the wind speed distribution of the axial fan's airflow field, which can fully and effectively improve the heat exchange efficiency of the finned heat exchanger.

[0010] According to the present invention, the dimension of the reinforcing part along the reference direction is the length dimension of the reinforcing part; In any two adjacent fins, the one closer to the central axis of the axial fan has a longer length than the other.

[0011] With this configuration, the fins farther from the central axis of the axial fan along the heat exchange tube axis have smaller reinforcement lengths; conversely, the fins closer to the central axis of the axial fan along the heat exchange tube axis have larger reinforcement lengths. This makes the distribution of the various reinforcements in the fin assembly more compatible with the wind speed distribution of the axial fan, further improving the heat exchange efficiency of the finned heat exchanger.

[0012] According to the present invention, a finned heat exchanger is provided in which the reinforcing part protrudes from the base part on the side of the fin assembly facing the fan; And / or, the reinforcing portion protrudes from the base portion on the side of the fin assembly facing away from the fan.

[0013] With this configuration, when the reinforcing part protrudes from the base on the fan-facing side of the fin assembly, a circular boss is formed on that side. Similarly, when the reinforcing part protrudes from the base on the fan-away side of the fin assembly, a circular boss is formed on that side as well. The reinforcing part can protrude from the base on either the fan-facing or fan-away side, or both. The specific arrangement can be determined based on the space available on the fan-facing side and the fan-away side of the fin assembly.

[0014] According to the present invention, a finned heat exchanger is provided, wherein the fins further have a transition portion, the transition portion is disposed between the reinforcing portion and the base portion, the surface of the transition portion is smoothly connected to the surface of the reinforcing portion, and the surface of the transition portion is smoothly connected to the surface of the base portion.

[0015] This design reduces stress concentration and improves the structural durability of the fins under conditions such as vibration and thermal expansion and contraction.

[0016] According to the present invention, a finned heat exchanger is provided in which the base part, the reinforcing part and the transition part are integrally formed.

[0017] This design allows the fins to be formed in one step through processes such as stamping and casting, eliminating the need for subsequent welding, riveting, or assembly. This improves the structural integrity of the fins and enhances their mechanical strength and resistance to deformation.

[0018] According to the present invention, a finned heat exchanger is provided, wherein the heat exchange tubes are arranged in groups, and each group of heat exchange tubes is spaced apart along a reference direction, wherein the reference direction, the axis of the heat exchange tubes, and the distribution direction of the fan and the fin assembly are perpendicular to each other. In each group of heat exchange tubes, two adjacent tubes are connected in series by a detour section; Each of the fins is provided with a through hole, and each through hole on the fin corresponds one-to-one with each group of heat exchange tubes.

[0019] With this configuration, a set of heat exchange tubes can pass through a single fin, allowing heat from each tube to be transferred to the fin. Furthermore, the fins cover the gap between adjacent heat exchange tubes along the tube distribution direction, maximizing the heat exchange area between the finned heat exchanger and the airflow.

[0020] According to the present invention, a finned heat exchanger is provided, wherein at least two sets of heat exchange tubes are provided, and the heat exchange tubes in each set are spaced apart along the distribution direction of the finned assembly and the fan. Each group of heat exchange tubes corresponds to one fin assembly, or each group of heat exchange tubes corresponds to one fin assembly.

[0021] This configuration allows each group of heat exchange tubes to correspond to one fin assembly. When there are at least two groups of heat exchange tubes, at least two fin assemblies are required, with each fin assembly allowing one group of heat exchange tubes to pass through. Alternatively, each group of heat exchange tubes can correspond to one fin assembly, with each group of heat exchange tubes passing through the same fin assembly when there are at least two groups of heat exchange tubes.

[0022] This utility model also provides an outdoor unit, including the above-mentioned finned heat exchanger.

[0023] With this configuration, the outdoor unit provided by this utility model has the advantages of high heat exchange efficiency, high cooling capacity, and high energy efficiency ratio.

[0024] This utility model also provides an air conditioner, including the above-mentioned finned heat exchanger, or including the above-mentioned outdoor unit.

[0025] With this configuration, the air conditioner provided by this utility model has the advantages of high cooling capacity and high energy efficiency ratio.

[0026] This utility model provides a finned heat exchanger, including heat exchange tubes and finned assemblies. The finned assembly includes multiple fins spaced apart along the axial direction of the heat exchange tubes, with the heat exchange tubes sequentially passing through each fin. Heat from the heat exchange tubes is transferred to the fins, and both the fins and heat exchange tubes exchange heat with the airflow, thus improving heat exchange efficiency. The position of the fins corresponding to the fan's central region is designated as a reinforcing section, and the position corresponding to the fan's edge region is designated as a base section. Along the distribution direction of the fan and finned assembly, the size of the reinforcing section is larger than the size of the base section. This arrangement, with the reinforcing section, increases the heat exchange area between the airflow in the fan's central region and the fins, increasing the heat exchange time between the airflow in the fan's central region and the fins, resulting in more thorough heat exchange and improving the heat exchange efficiency per unit air volume. This solves the problem of insufficient heat exchange in the fan's central region of heat exchangers in related technologies.

[0027] Furthermore, the outdoor unit provided by this utility model has the finned heat exchanger described above, and therefore also possesses the various advantages described above.

[0028] Furthermore, the air conditioner provided by this utility model, having the finned heat exchanger or outdoor unit as described above, also possesses the various advantages described above. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram showing the relative positions of the heat exchange tubes and fin assemblies in the finned heat exchanger provided by this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the fins provided by this utility model.

[0032] Figure 3 This is a schematic diagram of the external structure of the finned heat exchanger provided by this utility model (only the shape of the fin assembly is shown).

[0033] Figure 4 This is a comparison diagram of the projection views of the fins of the fin assembly provided by this utility model, which are spaced apart along the axis of the heat exchange tube, along the axis of the heat exchange tube.

[0034] Figure label: 1. Heat exchange tube; 2. Fin; 3. Reinforcing section; 4. Base section; 5. Transition section; 6. Through hole. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] The following is combined with Figures 1 to 4 This invention describes a finned heat exchanger.

[0037] like Figures 1 to 4 As shown, the finned heat exchanger provided in this embodiment of the present invention includes a heat exchange tube 1 and a fin assembly.

[0038] Specifically, the fin assembly includes multiple fins 2, which are spaced apart along the axial direction of the heat exchange tube 1, with the heat exchange tube 1 passing through each fin 2 in sequence. The heat from the heat exchange tube 1 is transferred to the fins 2, and both the fins 2 and the heat exchange tube 1 exchange heat with the airflow, which can improve the heat exchange efficiency.

[0039] The position of the fin 2 corresponding to the central area of ​​the fan is the reinforcing part 3, and the position of the fin 2 corresponding to the edge area of ​​the fan is the base part 4. Along the distribution direction of the fan and the fin assembly, the size of the reinforcing part 3 is larger than the size of the base part 4.

[0040] This configuration, with the reinforcement section 3, increases the heat exchange area between the airflow in the central area of ​​the fan and the fins 2, and increases the heat exchange time between the airflow in the central area of ​​the fan and the fins 2, resulting in more thorough heat exchange and improving the heat exchange efficiency per unit air. This solves the problem of insufficient heat exchange in the corresponding central area of ​​the fan in related technologies.

[0041] Fin 2 is a thin, sheet-like structure. Generally, the plane containing fin 2 is perpendicular to the axis of heat exchange tube 1, and the axis of heat exchange tube 1 is aligned with the thickness direction of fin 2. The distribution direction of the fan and fin assembly is parallel to the plane containing fin 2. If fin 2 is rectangular, then the width direction of fin 2 is parallel to the distribution direction of the fan and fin assembly, and the length direction of fin 2 is perpendicular to the distribution direction of the fan and fin assembly. The length direction of fin 2 is the reference direction. That is, the reference direction, the axis of heat exchange tube 1, and the distribution direction of the fan and fin assembly are all perpendicular to each other. The distribution direction of the fan and fin assembly is as follows: Figure 3 The direction indicated by y in the middle, the reference direction is as follows: Figure 3 The direction indicated by z in the figure is the axial direction of heat exchange tube 1 as follows: Figure 3 The direction indicated by x in the middle.

[0042] In this embodiment, the fan is an axial flow fan, and the fin 2 has a reinforcing part 3 and a pair of base parts 4. The pair of base parts 4 are distributed at both ends of the reinforcing part 3 along the reference direction.

[0043] In the wind field of the axial fan, the wind speed is high in the middle region and low in the two end regions along the reference direction. The distribution of the reinforcing part 3 and the base part 4 of each fin 2 matches the wind speed distribution of the axial fan, which can fully and effectively improve the heat exchange efficiency of the finned heat exchanger.

[0044] The dimension of the reinforcing part 3 along the reference direction is the length dimension of the reinforcing part 3. In a further embodiment, in any two adjacent fins 2, the length dimension of the one closer to the central axis of the axial fan is greater than the length dimension of the other.

[0045] The blades of an axial fan rotate around its central axis, and the airflow is primarily propelled along the fan's axial direction. The projected shape of the wind field in a plane perpendicular to the airflow direction is circular. Within the wind field, the wind speed is higher near the central axis and lower further away. The dimensions of the wind field along the reference direction gradually decrease away from the central axis.

[0046] The fins 2 farther from the central axis of the axial fan along the axis of the heat exchange tube 1 have smaller lengths for their reinforcing portions 3; conversely, the fins 2 closer to the central axis of the axial fan along the axis of the heat exchange tube 1 have larger lengths for their reinforcing portions 3. This ensures that the distribution of the various reinforcing portions 3 of the fin assembly and the base portion 4 better matches the wind speed distribution of the axial fan, further improving the heat exchange efficiency of the finned heat exchanger.

[0047] It should be noted that some fins 2 do not correspond to the central area of ​​the fan at all, but only to the low-speed area of ​​the wind field. These fins 2 only have a base portion 4 and no reinforcing portion 3. Generally, the fins 2 located at the outermost position in the fin assembly do not have a reinforcing portion 3. These fins 2 are regular rectangles, as shown in the figure. Figure 4 .

[0048] In this embodiment, the reinforcing part 3 protrudes from the base part 4 on the side of the fin assembly facing the fan, and / or the reinforcing part 3 protrudes from the base part 4 on the side of the fin assembly facing away from the fan.

[0049] When the reinforcing part 3 protrudes from the base part 4 on the side of the fin assembly facing the fan, a circular boss is formed on that side. When the reinforcing part 3 protrudes from the base part 4 on the side of the fin assembly facing away from the fan, a circular boss is formed on that side.

[0050] Specifically, the reinforcing part 3 can protrude from the base part 4 on the side of the fin assembly facing the fan, or it can protrude from the base part 4 on the side of the fin assembly away from the fan, or it can protrude from the base part 4 on both sides. The specific arrangement can be determined based on the space conditions on the side of the fin assembly closest to the fan and the side of the fin assembly furthest from the fan.

[0051] In this embodiment of the present invention, the fin 2 further has a transition portion 5, which is disposed between the reinforcing portion 3 and the base portion 4. The surface of the transition portion 5 is smoothly connected to the surface of the reinforcing portion 3, and the surface of the transition portion 5 is smoothly connected to the surface of the base portion 4.

[0052] The transition section 5 reduces stress concentration and improves the structural durability of the fin 2 under conditions such as vibration and thermal expansion and contraction.

[0053] In this embodiment, the base part 4, the reinforcing part 3, and the transition part 5 are integrally formed.

[0054] The fin 2 is formed in one step through processes such as stamping and casting, without the need for subsequent welding, riveting or assembly, which improves the structural integrity of the fin 2 and enhances its mechanical strength and resistance to deformation.

[0055] In this embodiment, the heat exchange tubes 1 are arranged in groups, with each group of heat exchange tubes 1 spaced apart along the reference direction. Adjacent heat exchange tubes 1 in each group are connected in series via a meandering section, such as... Figure 1 As shown.

[0056] Each fin 2 is provided with a through hole 6, and the through hole 6 on each fin 2 corresponds one-to-one with each group of heat exchange tubes 1. That is to say, one fin 2 can allow a group of heat exchange tubes 1 to pass through, and the heat of each heat exchange tube 1 can be transferred to the fin 2. Moreover, along the distribution direction of the heat exchange tubes 1, the fins 2 cover the gap between two adjacent heat exchange tubes 1, maximizing the heat exchange area between the finned heat exchanger and the airflow.

[0057] In a further embodiment, at least two sets of heat exchange tubes 1 are provided, and each set of heat exchange tubes 1 is distributed at intervals along the distribution direction of the fin assembly and the fan.

[0058] Specifically, each group of heat exchange tubes 1 can correspond to one fin assembly. When at least two groups of heat exchange tubes 1 are set, at least two fin assemblies need to be set accordingly, and each fin assembly is supplied with a group of heat exchange tubes 1.

[0059] Alternatively, each group of heat exchange tubes 1 can correspond to one fin assembly. When at least two groups of heat exchange tubes 1 are provided, each group of heat exchange tubes 1 can pass through the same fin assembly.

[0060] In this embodiment, when addressing the problem of insufficient heat exchange in the corresponding central area of ​​the fan in the finned heat exchanger, only the shape of the fin 2 is improved. There is no need to change the size of the heat exchange tube 1. The original fin 2 can be directly replaced, which is highly applicable and has low production and modification costs.

[0061] On the other hand, this embodiment of the present invention also provides an outdoor unit, including the finned heat exchanger provided in any of the above embodiments. The finned heat exchanger provided in any of the above embodiments has the advantages of sufficient heat exchange and high heat exchange efficiency; therefore, the outdoor unit provided in this embodiment has the advantages of high heat exchange efficiency, high cooling capacity, and high energy efficiency ratio. The derivation process of the beneficial effects of the outdoor unit in this embodiment of the present invention is largely similar to the derivation process of the beneficial effects of the finned heat exchanger described above, and therefore will not be repeated here.

[0062] Furthermore, this utility model embodiment also provides an air conditioner, including the finned heat exchanger or outdoor unit provided in any of the above embodiments. It possesses all the advantages of the aforementioned finned heat exchanger or outdoor unit. The derivation process of the beneficial effects of the air conditioner in this utility model embodiment is largely similar to the derivation process of the beneficial effects of the aforementioned finned heat exchanger or outdoor unit, and therefore will not be repeated here.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A finned heat exchanger, characterized in that, include: Heat exchange tube (1); The fin assembly includes multiple fins (2), which are spaced apart along the axial direction of the heat exchange tube (1). The heat exchange tube (1) passes through each fin (2) in sequence. The fin (2) is a reinforcing part (3) corresponding to the central area of ​​the fan, and the fin (2) is a base part (4) corresponding to the edge area of ​​the fan. Along the distribution direction of the fan and the fin assembly, the size of the reinforcing part (3) is larger than the size of the base part (4).

2. The finned heat exchanger according to claim 1, characterized in that, The fan is an axial flow fan. The fin (2) has the reinforcing part (3) and a pair of the base parts (4). The pair of base parts (4) are distributed at both ends of the reinforcing part (3) along a reference direction. The reference direction, the axis of the heat exchange tube (1) and the distribution direction of the fan and the fin assembly are perpendicular to each other.

3. The finned heat exchanger according to claim 2, characterized in that, The dimension of the reinforcing part (3) along the reference direction is the length dimension of the reinforcing part (3); In any two adjacent fins (2), the length of the one closer to the central axis of the axial fan is greater than the length of the other.

4. The finned heat exchanger according to claim 3, characterized in that, The reinforcing part (3) protrudes from the base part (4) on the side of the fin assembly facing the fan. And / or, the reinforcing part (3) protrudes from the base part (4) on the side of the fin assembly facing away from the fan.

5. The finned heat exchanger according to claim 1, characterized in that, The fin (2) also has a transition portion (5), which is disposed between the reinforcing portion (3) and the base portion (4). The surface of the transition portion (5) is smoothly connected to the surface of the reinforcing portion (3) and the surface of the base portion (4).

6. The finned heat exchanger according to claim 5, characterized in that, The base part (4), the reinforcing part (3) and the transition part (5) are integrally formed.

7. The finned heat exchanger according to claim 1, characterized in that, The heat exchange tubes (1) are arranged in groups, and each group of heat exchange tubes (1) is distributed at intervals along a reference direction. The reference direction, the axis of the heat exchange tubes (1), and the distribution direction of the fan and the fin assembly are perpendicular to each other. In each group of heat exchange tubes (1), two adjacent tubes are connected in series by a detour section; Each of the fins (2) is provided with a through hole (6), and the through hole (6) on each fin (2) corresponds one-to-one with each group of heat exchange tubes (1).

8. The finned heat exchanger according to claim 7, characterized in that, The heat exchange tubes (1) are provided in at least two sets, and the heat exchange tubes (1) are distributed at intervals along the distribution direction of the fin assembly and the fan; Each group of heat exchange tubes (1) corresponds to one fin assembly, or each group of heat exchange tubes (1) corresponds to one fin assembly.

9. An outdoor unit, characterized in that, Including the finned heat exchanger as described in any one of claims 1 to 8.

10. An air conditioner, characterized in that, Includes the finned heat exchanger as described in any one of claims 1 to 8, or includes the outdoor unit as described in claim 9.

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