Heat exchange tube, heat exchanger and air conditioner

Abstract

The application discloses a heat exchange pipe, which comprises a heat exchange pipe body, the heat exchange pipe body is provided with at least one heat exchange strengthening section and at least one drag reduction section, the heat exchange strengthening section and the drag reduction section are arranged along the direction of fluid flow in the heat exchange pipe; wherein, a plurality of recessed grooves are arranged on the inner wall of the drag reduction section. By arranging the heat exchange strengthening section and the drag reduction section on the inner wall of the heat exchange pipe body, the heat exchange efficiency of the heat exchange pipe can be improved, and the flow speed of the heat exchange working medium in the heat exchange pipe can be improved. The application further discloses a heat exchanger adopting the heat exchange pipe, and the heat exchange efficiency of the heat exchanger is improved. The application further discloses an air conditioner adopting the heat exchanger, and the heat exchange efficiency of the air conditioner is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchange, and particularly to a heat exchange tube, a heat exchanger, and an air conditioner. Background Technology

[0002] To improve the heat exchange efficiency of heat exchange tubes, the traditional method is to use copper tubes with good thermal conductivity. To further enhance the heat exchange efficiency, a threaded rib structure is usually set inside the heat exchange tube. This not only increases the heat exchange area between the heat exchange tube and the working medium but also extends the heat exchange time, thus enhancing the heat exchange effect. However, the threaded rib structure inside the heat exchange tube significantly increases the flow resistance of the working medium and reduces its flow velocity inside the heat exchange tube. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a heat exchange tube that has high heat exchange efficiency and can reduce the resistance to the flow of the heat exchange working fluid inside the heat exchange tube.

[0004] The present invention also proposes a heat exchanger comprising the aforementioned heat exchange tube, which not only improves the heat exchange efficiency of the heat exchanger but also reduces the resistance to the flow of the heat exchange medium inside the heat exchange tube.

[0005] The present invention also proposes an air conditioner including the above-mentioned heat exchanger, which not only improves the heat exchange efficiency of the air conditioner and reduces energy consumption, but also reduces the resistance of the heat exchange working fluid flowing inside the heat exchange tube.

[0006] According to a first aspect of the present invention, a heat exchange tube includes a heat exchange tube body, the heat exchange tube body having at least one enhanced heat exchange section and at least one drag-reducing section, the enhanced heat exchange section and the drag-reducing section being arranged along the direction of fluid flow within the heat exchange tube; wherein, the inner wall of the drag-reducing section is provided with a plurality of recessed grooves.

[0007] According to the first aspect of the present invention, the heat exchange tube has at least the following beneficial effects: by providing at least one enhanced heat exchange section on the inner wall of the heat exchange tube body, the heat exchange efficiency between the heat exchange medium and the heat exchange tube can be improved. Moreover, by providing at least one drag-reducing section on the inner wall of the heat exchange tube body, when the heat exchange medium flows inside the heat exchange tube and flows through the drag-reducing section, the drag-reducing section can reduce the resistance to the flow of the heat exchange medium, which helps to increase the flow velocity of the heat exchange medium inside the heat exchange tube.

[0008] According to a first aspect of the present invention, the heat exchange tube has at least two enhanced heat exchange sections and at least two drag-reducing sections, and the enhanced heat exchange sections and the drag-reducing sections are arranged alternately in sequence along the direction of fluid flow within the heat exchange tube.

[0009] According to a first aspect embodiment of the heat exchange tube, the inner wall of the enhanced heat exchange section is provided with ribs protruding toward the interior of the heat exchange tube body, and the ribs are spirally arranged along the axial direction of the heat exchange tube body.

[0010] According to a first aspect of the present invention, the heat exchange tube is provided in which the ribs are composed of a rib unit, and the pitch of the rib unit is not constant.

[0011] According to a first aspect embodiment of the present invention, in the heat exchange tube, the pitch of the rib unit first decreases and then gradually increases along the direction of fluid flow within the heat exchange tube.

[0012] According to a first aspect of the present invention, the heat exchange tube is composed of a rib unit, and the height of the rib unit is not constant along the axial direction of the heat exchange tube body.

[0013] According to a first aspect embodiment of the present invention, in a heat exchange tube, the height of the rib unit first increases and then decreases along the direction of fluid flow within the heat exchange tube.

[0014] According to a first aspect of the present invention, the heat exchange tube is composed of at least two rib units, all of which are arranged sequentially along the axial direction of the heat exchange tube body on the inner wall of the enhanced heat exchange section, and the pitch of two adjacent rib units is different.

[0015] According to a first aspect of the present invention, the heat exchange tube has at least three rib units, and at least one of the rib units has a constant pitch. Along the direction of fluid flow in the heat exchange tube, the pitch of the rib first decreases and then gradually increases.

[0016] According to a first aspect embodiment of the heat exchange tube, the pitch of all the rib units is not constant, and the pitch of the ribs first decreases and then gradually increases along the direction of fluid flow in the heat exchange tube.

[0017] According to a first aspect of the present invention, the heat exchange tube is composed of at least two rib units, all of which are arranged sequentially along the axial direction of the heat exchange tube body on the inner wall of the enhanced heat exchange section, and the heights of two adjacent rib units are different.

[0018] According to a first aspect embodiment of the heat exchange tube, the height of each of the rib units is constant.

[0019] According to a first aspect of the invention, in the heat exchange tube, the height of at least one of the rib units is not constant.

[0020] According to a first aspect of the present invention, the heat exchange tube has at least three rib units, and the height of the ribs first increases and then decreases along the direction of fluid flow within the heat exchange tube.

[0021] According to a first aspect of the present invention, in a heat exchange tube, at least one of the rib units is composed of a plurality of independent protrusions arranged at intervals in sequence.

[0022] According to a first aspect embodiment of the heat exchange tube, the distance between two adjacent protrusions in the same rib unit is different.

[0023] According to the heat exchange tube of the first aspect of the present invention, the shapes of the protrusions are all different.

[0024] According to a first aspect embodiment of the heat exchange tube, at least two rib units are composed of a plurality of independent protrusions arranged sequentially at intervals, the protrusion spacing between two adjacent protrusions of the same rib unit is the same; the protrusion spacing between two different rib units is different.

[0025] According to the first aspect of the present invention, the protrusions constituting the same rib unit have the same shape, while the protrusions of different rib units have different shapes.

[0026] According to a first aspect of the present invention, the heat exchange tube body further includes at least one transition section disposed between the enhanced heat exchange section and the drag-reducing section.

[0027] According to a first aspect of the present invention, the heat exchange tube, the enhanced heat exchange section, the drag reduction section and the transition section are each at least two sections, and the enhanced heat exchange section, the transition section and the drag reduction section are arranged alternately in sequence along the direction of fluid flow in the heat exchange tube.

[0028] A heat exchanger according to a second aspect of the present invention includes: a heat exchange tube as described above.

[0029] The heat exchanger according to the second aspect of the present invention has at least the following beneficial effects: by using the heat exchange tubes described above, the heat exchanger can not only provide the heat exchange efficiency between the heat exchange medium and the heat exchange tubes, but also reduce the resistance to the flow of the heat exchange medium inside the heat exchange tubes and increase the flow velocity of the heat exchange medium, thereby making the heat exchanger perform better.

[0030] An air conditioner according to a third aspect of the present invention includes the heat exchanger described above.

[0031] The air conditioner according to the third aspect embodiment of the present invention has at least the following beneficial effects:

[0032] By using the heat exchanger described above, air conditioners can significantly improve their heat exchange efficiency and reduce energy consumption.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0035] Figure 1 This is a schematic diagram of the structure of a heat exchange tube according to an embodiment of the first aspect of the present invention;

[0036] Figure 2 for Figure 1 The image shows a cross-sectional view of the heat exchange tube along line AA.

[0037] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0038] Figure 4 for Figure 2 Enlarged diagram of point C in the middle.

[0039] Icon labels:

[0040] The heat exchange tube body is 100, the transition section is 200, the drag reduction section is 300, the recessed groove is 310, the enhanced heat exchange section is 400, the rib is 500, the rib unit is 510, and the protrusion is 520. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The following reference Figures 1 to 4 A heat exchange tube, a heat exchanger, and an air conditioner are described according to embodiments of the present invention.

[0046] Reference Figures 1 to 2 ( Figure 2 (The direction of the middle arrow indicates the direction of the heat exchange medium flow inside the heat exchange tube.) According to an embodiment of the first aspect of the present invention, the heat exchange tube includes a hollow heat exchange tube body 100. In this embodiment, the heat exchange tube body 100 is a long, circular hollow tube. It should be noted that the heat exchange tube body 100 can also be a square hollow tube, a triangular hollow tube, an elliptical hollow tube, a polygonal hollow tube, or other irregularly shaped hollow tubes, etc., and is not limited to a circular hollow tube; the specific shape can be determined according to actual needs. The heat exchange tube body 100 has a heat exchange enhancement section 400 and a drag reduction section 300. The heat exchange enhancement section 400 and the drag reduction section 300 are arranged sequentially along the direction of heat exchange medium flow inside the heat exchange tube body 100. The inner wall of the drag reduction section 300 is provided with a plurality of recessed grooves 310, which collapse along the direction from the inner wall of the heat exchange tube body 100 towards the outer wall of the tube.

[0047] Reference Figure 3 In this embodiment, the recessed groove 310 is an arc-shaped recessed groove or a hemispherical recessed groove. Multiple arc-shaped recessed grooves are evenly arranged on the inner wall of the drag-reducing section 300, or multiple hemispherical recessed grooves are evenly arranged on the inner wall of the drag-reducing section 300. It should be noted that the multiple arc-shaped recessed grooves can also be non-uniformly arranged on the inner wall of the drag-reducing section 300, or the multiple hemispherical recessed grooves can also be non-uniformly arranged on the inner wall of the drag-reducing section 300; the specific arrangement can be freely configured according to actual needs.

[0048] It is understood that the recessed groove 310 can also be a square recessed groove, a V-shaped recessed groove, an elliptical recessed groove, or a recessed groove of other shapes, depending on the actual needs, and is not limited to the above-mentioned arc-shaped recessed groove or hemispherical recessed groove.

[0049] It should be noted that, in the above embodiments, the number of the enhanced heat exchange section 400 and the drag reduction section 300 provided on the inner wall of the heat exchange tube body 100 is one. In some embodiments, the number of the enhanced heat exchange section 400 provided on the inner wall of the heat exchange tube body 100 can be two, three or more, and the number of the drag reduction section 300 provided on the inner wall of the heat exchange tube body 100 can also be two, three or more.

[0050] When there are two or more sections of both the enhanced heat exchange section 400 and the drag reduction section 300, all the enhanced heat exchange sections 400 and all the drag reduction sections 300 are arranged alternately in sequence along the direction of heat exchange medium flow within the heat exchange tube body 100. By adopting the above structure, after each flow of the heat exchange medium through the enhanced heat exchange section 400, the drag reduction section 300 can reduce the drag of the heat exchange medium, thereby reducing the resistance to the flow of the heat exchange medium and facilitating the flow of the heat exchange medium inside the heat exchange tube body 100.

[0051] By providing an enhanced heat exchange section 400 on the inner wall of the heat exchange tube body 100, when the heat exchange medium flows through the enhanced heat exchange section 400 inside the heat exchange tube body 100, the enhanced heat exchange section 400 hinders the flow of the heat exchange medium. At this time, the heat exchange medium has a longer contact time with the inner wall of the heat exchange tube body 100 and a larger contact area. That is, the heat exchange area for heat exchange between the heat exchange medium and the heat exchange tube body 100 is larger, and therefore the heat exchange efficiency is higher. When the heat exchange medium flows through the enhanced heat exchange section 400, its flow rate slows down due to the resistance of the enhanced heat exchange section 400, which in turn affects the flow of the heat exchange medium inside the heat exchange tube body 100. A drag-reducing section 300 is provided on the inner wall of the heat exchange tube body 100. When the heat exchange medium flows through the enhanced heat exchange section 400 and into the drag-reducing section 300, the heat exchange medium located on the outer periphery comes into contact with multiple recessed grooves 310 provided on the inner wall of the drag-reducing section 300. At this time, the heat exchange medium entering the recessed grooves 310 forms a vortex. During the flow process, the heat exchange medium is affected by the vortex, which greatly reduces the flow resistance of the heat exchange medium and helps to increase the flow rate of the heat exchange medium inside the heat exchange tube body 100. This shortens the circulation time of the heat exchange medium inside the heat exchange tube body 100 and helps to increase the number of times the heat exchange medium circulates inside the heat exchange tube body 100 per unit time, thereby improving the heat exchange efficiency of the heat exchange tube.

[0052] Reference Figure 2 and Figure 3To facilitate the production and processing of heat exchange tubes, in some embodiments of the first aspect of the present invention, the recessed groove 310 is formed by the inner wall of the drag-reducing section 300 being compressed by external force towards the outer wall of the tube. In this embodiment, the recessed groove 310 collapses along the direction from the inner wall of the drag-reducing section 300 towards the outer wall of the tube, thereby forming multiple micro-protrusions on the outer wall of the drag-reducing section 300. Therefore, during the production process, an extrusion device can be used to extrude part of the inner wall of the heat exchange tube body 100 to form the aforementioned multiple recessed grooves 310, thereby forming the required drag-reducing section 300 on the inner wall of the heat exchange tube body 100. This makes production simpler and more convenient, increases production efficiency, and reduces manufacturing costs.

[0053] It should be noted that the recessed groove 310 can also be formed by removing material from the inner wall of the drag-reducing section 300. In this case, the outer wall of the drag-reducing section 300 is smooth and without protrusions. During the production process, equipment can be used to cut and process part of the inner wall of the heat exchange tube body 100, thereby removing material from part of the inner wall of the heat exchange tube body 100 and forming the above-mentioned multiple recessed grooves 310, thus forming the required drag-reducing section 300 on the inner wall of the heat exchange tube body 100. Different processing methods can be selected according to actual needs.

[0054] Reference Figure 1 , Figure 2 and Figure 4 To enhance the heat exchange effect between the heat exchange medium and the heat exchange tube, in some embodiments of the first aspect of the present invention, a rib 500 is provided on the inner wall of the enhanced heat exchange section 400, and the rib 500 protrudes in a direction toward the interior of the heat exchange tube body 100. The rib 500 is spirally arranged along the axial direction of the heat exchange tube body 100. When the heat exchange medium flows through the enhanced heat exchange section 400, under the guidance of the rib 500, the heat exchange medium spirally flows forward in the enhanced heat exchange section 400, which can slow down the flow velocity of the heat exchange medium inside the enhanced heat exchange section 400, and at the same time, it can make the heat exchange medium continuously tumble and contact the inner wall of the enhanced heat exchange section 400 for heat exchange, resulting in better heat exchange effect and greatly improving the heat exchange efficiency between the heat exchange medium and the heat exchange tube.

[0055] It is understandable that, in addition to the structure described above, the enhanced heat exchange section 400 may also have other structures. Specifically, the inner wall of the enhanced heat exchange section 400 is provided with multiple annular protrusions (not shown in the figure) spaced apart from each other. The annular protrusions protrude from the inner wall of the enhanced heat exchange section 400 toward the interior of the enhanced heat exchange section 400. The multiple annular protrusions are arranged one by one along the axial direction of the heat exchange tube body 100. When the heat exchange medium flows through the enhanced heat exchange section 400, under the action of the multiple annular protrusions, the heat exchange medium tumbles and flows in waves inside the enhanced heat exchange section 400, thereby making the heat exchange medium and the inner wall of the enhanced heat exchange section 400 more fully contact each other for heat exchange, and the heat exchange time is longer. Therefore, the heat exchange effect is better, and the heat exchange efficiency between the heat exchange medium and the heat exchange tube is greatly improved.

[0056] Alternatively, the inner circumferential wall of the enhanced heat exchange section 400 is provided with multiple straight protrusions (not shown in the figure) spaced apart from each other. The multiple straight protrusions are arranged along the axial direction of the heat exchange tube body 100 on the inner wall of the enhanced heat exchange section 400, and are evenly arranged around the inner wall of the enhanced heat exchange section 400. When the heat exchange medium flows through the enhanced heat exchange section 400, under the action of the multiple straight protrusions, the heat exchange medium collides and tumbles inside the enhanced heat exchange section 400, thereby making the heat exchange medium and the inner wall of the enhanced heat exchange section 400 more fully contact and exchange heat, and the heat exchange time is longer. Therefore, the heat exchange effect is better, and the heat exchange efficiency between the heat exchange medium and the heat exchange tube is greatly improved.

[0057] It should be noted that the ribs 500 of the inner peripheral wall of the enhanced heat exchange section 400 can be composed of one, two, three, or more rib units 510. The aforementioned rib unit 510 refers to a protruding rib disposed on the inner peripheral wall of the enhanced heat exchange section 400. For example... Figure 2 and Figure 4 As shown, the rib 500 consists of three rib units 510 arranged sequentially along the axial direction of the heat exchange tube body 100. It should be noted that the three rib units 510 may be arranged at intervals on the inner wall of the enhanced heat exchange section 400, meaning there is a gap between adjacent rib units 510, the size of which can be determined according to actual needs. In some embodiments, the three rib units 510 may be arranged continuously on the inner wall of the enhanced heat exchange section 400, meaning there is no gap between adjacent rib units 510.

[0058] By providing three independent rib units 510 on the inner wall of the enhanced heat exchange section 400, the heat exchange medium flows through the enhanced heat exchange section 400 and contacts the three rib units 510 in sequence. The three rib units 510 can make the heat exchange medium continuously spiral and roll forward in the enhanced heat exchange section 400, which can slow down the flow speed of the heat exchange medium inside the enhanced heat exchange section 400, and at the same time make the heat exchange medium continuously roll and contact the inner wall of the enhanced heat exchange section 400 for heat exchange, resulting in better heat exchange effect and greatly improving the heat exchange efficiency between the heat exchange medium and the heat exchange tube.

[0059] To improve heat exchange in the enhanced heat exchange section 400, in some embodiments of the first aspect of the invention, the rib 500 is composed of a rib unit 510 with a non-constant pitch. Along the flow direction of the heat exchange medium inside the heat exchange tube body 100, the pitch of the rib unit 510 first decreases and then gradually increases. As the heat exchange medium flows through the enhanced heat exchange section 400, it continuously rotates and tumbles forward. Furthermore, the flow velocity of the heat exchange medium varies under the action of the rib unit 510, leading to continuous collisions and more intense tumbling during flow. This repeated contact between the heat exchange medium and the enhanced heat exchange section 400 results in better heat exchange performance.

[0060] Understandably, along the direction of the heat exchange medium flow inside the heat exchange tube body 100, the pitch of the rib unit 510 can also be set to first increase and then gradually decrease. By adopting the above structure, the rib units 510 on the inner wall of the front section of the enhanced heat exchange section 400 can be sparser, while the rib units 510 on the inner wall of the rear section of the enhanced heat exchange section 400 can be denser. Therefore, when the heat exchange medium flows in the enhanced heat exchange section 400, the flow velocity of the heat exchange medium changes from fast to slow, making it easier for the heat exchange medium to collide and tumble. The tumbling of the heat exchange medium is more intense, resulting in repeated contact and heat exchange between the heat exchange medium and the enhanced heat exchange section 400, leading to better heat exchange effect. The aforementioned front section of the enhanced heat exchange section 400 refers to the position where the heat exchange medium first flows through and contacts the enhanced heat exchange section 400, while the position where the heat exchange medium subsequently flows through the enhanced heat exchange section 400 is the rear section of the enhanced heat exchange section 400.

[0061] Alternatively, along the direction from the front to the rear of the enhanced heat exchange section 400, the pitch of the rib unit 510 can be set to first increase, then remain unchanged, and finally decrease. By adopting the above structure, the rib units 510 on the inner wall of the front section of the enhanced heat exchange section 400 can be sparser, the rib units 510 on the inner wall of the middle section of the enhanced heat exchange section 400 can be more uniform, and the rib units 510 on the inner wall of the rear section of the enhanced heat exchange section 400 can be more compact. Therefore, when the heat exchange medium flows in the enhanced heat exchange section 400, the flow velocity of the heat exchange medium changes from fast at the beginning to medium in the middle, and then to slow at the end. As a result, the heat exchange medium is more likely to collide and tumble, and the tumbling of the heat exchange medium is more intense. Thus, the heat exchange medium repeatedly contacts and exchanges heat with the enhanced heat exchange section 400, resulting in better heat exchange effect.

[0062] To enhance the heat exchange effect of the enhanced heat exchange section 400, in some embodiments of the first aspect of the present invention, the rib 500 is composed of a rib unit 510. Along the axial direction of the heat exchange tube body 100, the height of the rib unit 510 is not constant. In this embodiment, the height of the rib unit 510 refers to the height at which the rib unit 510 protrudes from the inner wall of the heat exchange tube body 100 towards the center of the heat exchange tube body 100. By setting the height of the rib unit 510 to be non-constant, the rib unit 510 is arranged in an undulating pattern along the direction of the heat exchange medium flow inside the heat exchange tube body 100. Therefore, when the heat exchange medium flows through the enhanced heat exchange section 400, the heat exchange medium can continuously undulate and tumble, and the heat exchange medium repeatedly collides with the rib unit 510. Consequently, the heat exchange medium has more sufficient contact with the inner wall of the enhanced heat exchange section 400, resulting in a better heat exchange effect.

[0063] In some embodiments of the first aspect of the present invention, the height of the rib unit 510 is set to first increase and then decrease along the direction of the flow of the heat exchange medium inside the heat exchange tube body 100. By adopting the above structure, when the heat exchange medium flows through the enhanced heat exchange section 400, the heat exchange medium continuously gathers towards the center of the enhanced heat exchange section 400 along the inner wall of the enhanced heat exchange section 400, and then disperses towards the inner wall of the enhanced heat exchange section 400. This makes the tumbling of the heat exchange medium more intense, the contact between the heat exchange medium and the inner wall of the enhanced heat exchange section 400 more sufficient, the heat exchange more thorough, and the heat exchange effect better.

[0064] Understandably, along the direction of heat exchange medium flow inside the heat exchange tube body 100, the height of the rib unit 510 can also be set to first increase, then decrease, then increase again, and finally decrease again. This structure allows the height of the rib unit 510 protruding from the inner wall to create an effect of alternating high and low elevations. By adopting the above structure, when the heat exchange medium flows through the enhanced heat exchange section 400, the heat exchange medium continuously gathers towards the center of the enhanced heat exchange section 400 along the inner wall of the enhanced heat exchange section 400, and then disperses back towards the inner wall of the enhanced heat exchange section 400. This process of gathering and dispersing allows the heat exchange medium to tumble more thoroughly. As a result, the inner wall of the enhanced heat exchange section 400 can come into contact with different heat exchange mediums for heat exchange, leading to more thorough heat exchange and a better heat exchange effect.

[0065] Reference Figure 2 and Figure 4 In some embodiments of the first aspect of the present invention, the ribs 500 provided on the inner wall of the enhanced heat exchange section 400 are composed of three rib units 510. It should be noted that the number of rib units 510 can also be two, four, or more, and is not limited to three. Along the axial direction of the heat exchange tube body 100, the three rib units 510 are sequentially arranged on the inner wall of the enhanced heat exchange section 400, and the pitches of adjacent rib units 510 are different. In this embodiment, the pitches of all three rib units 510 are constant, that is, the pitch of each rib unit 510 is fixed, while the pitches of adjacent rib units 510 are different. By adopting the above structure, the heat exchange medium can rotate to different degrees and its flow velocity can change when it flows through the three rib units 510. As a result, the heat exchange medium tumbles more fully inside the enhanced heat exchange section 400, and the inner wall of the enhanced heat exchange section 400 can contact and exchange heat with different heat exchange mediums, resulting in more thorough heat exchange and better heat exchange effect.

[0066] It should be noted that, in some embodiments of the first aspect of the present invention, the pitch of one of the three rib units 510 may be constant, while the pitches of the other two rib units 510 may be non-constant. Specifically, along the axial direction of the heat exchange tube body 100, the three rib units 510 are arranged sequentially on the inner wall of the enhanced heat exchange section 400, wherein the pitch of the rib unit 510 located on the inner wall of the front section of the enhanced heat exchange section 400 is constant, while the pitches of the rib unit 510 located on the inner wall of the middle section of the enhanced heat exchange section 400 and the rib unit 510 located on the inner wall of the rear section of the enhanced heat exchange section 400 are non-constant. When the heat exchange medium comes into contact with different rib units 510, the degree of rotation of the heat exchange medium is different, and the flow velocity of the heat exchange medium changes. As a result, the heat exchange medium tumbles more fully inside the enhanced heat exchange section 400. The inner wall of the enhanced heat exchange section 400 can contact and exchange heat with different heat exchange mediums, resulting in more thorough heat exchange and better heat exchange effect.

[0067] In some embodiments of the first aspect of the present invention, three rib units 510 are sequentially arranged on the inner wall of the enhanced heat exchange section 400 along the axial direction of the heat exchange tube body 100. The pitch of the rib units 510 located on the inner wall of the front section of the enhanced heat exchange section 400 is non-constant, while the pitch of the rib units 510 located on the inner wall of the middle section of the enhanced heat exchange section 400 is constant, and the pitch of the rib units 510 located on the inner wall of the rear section of the enhanced heat exchange section 400 is non-constant. When the heat exchange medium contacts different rib units 510, the degree of rotation of the heat exchange medium varies, and the flow velocity of the heat exchange medium changes. Therefore, the heat exchange medium tumbles more thoroughly inside the enhanced heat exchange section 400, and the inner wall of the enhanced heat exchange section 400 can contact and exchange heat with different heat exchange mediums, resulting in more thorough heat exchange and a better heat exchange effect.

[0068] In some embodiments of the first aspect of the present invention, three rib units 510 are sequentially arranged on the inner wall of the enhanced heat exchange section 400 along the axial direction of the heat exchange tube body 100. The pitch of the rib units 510 located on the inner wall of the front section and the middle section of the enhanced heat exchange section 400 is non-constant, while the pitch of the rib units 510 located on the inner wall of the rear section of the enhanced heat exchange section 400 is constant. When the heat exchange medium contacts different rib units 510, the degree of rotation of the heat exchange medium varies, and the flow velocity of the heat exchange medium changes. Therefore, the heat exchange medium tumbles more thoroughly inside the enhanced heat exchange section 400, and the inner wall of the enhanced heat exchange section 400 can contact and exchange heat with different heat exchange mediums, resulting in more thorough heat exchange and a better heat exchange effect.

[0069] In some embodiments of the first aspect of the present invention, along the direction of heat exchange medium flow inside the heat exchange tube body 100, the pitch of the three rib units 510 first decreases and then gradually increases. By adopting the above structure, under the action of the three rib units 510, when the heat exchange medium flows through the three rib units 510, the degree of rotation of the heat exchange medium is different when it contacts different rib units 510, and the flow velocity of the heat exchange medium changes. Therefore, the heat exchange medium tumbles more fully inside the enhanced heat exchange section 400, and the inner wall of the enhanced heat exchange section 400 can contact and exchange heat with different heat exchange mediums, resulting in more thorough heat exchange and better heat exchange effect.

[0070] In the above embodiment, at least one of the three rib units 510 has a constant pitch. It is understood that the pitch of the three rib units 510 can also be set to be non-constant, meaning that the pitch of each rib unit 510 is non-constant. Along the direction of heat exchange medium flow inside the heat exchange tube body 100, the pitch of the three rib units 510 first decreases and then gradually increases. When the heat exchange medium flows through the three rib units 510, the degree of rotation of the heat exchange medium varies when it contacts different rib units 510, and the flow velocity of the heat exchange medium changes. Therefore, the heat exchange medium tumbles more thoroughly inside the enhanced heat exchange section 400, and the inner wall of the enhanced heat exchange section 400 can contact and exchange heat with different heat exchange mediums, resulting in more thorough heat exchange and a better heat exchange effect.

[0071] In some embodiments of the first aspect of the present invention, the ribs 500 provided on the inner wall of the enhanced heat exchange section 400 are composed of three rib units 510. It is understood that the ribs 500 may also be composed of two, four, or more rib units 510, depending on actual needs. The three rib units 510 are arranged sequentially along the axial direction of the heat exchange tube body 100 on the inner wall of the enhanced heat exchange section 400, with adjacent rib units 510 having different heights. The height of the aforementioned rib unit 510 refers to the height at which the rib unit 510 protrudes from the inner wall of the heat exchange tube body 100 towards the center of the heat exchange tube body 100. In this embodiment, the heights of all three rib units 510 are constant, that is, the height of any protrusion from the inner wall of each rib unit 510 is the same, while the heights of adjacent rib units 510 are different. By adopting the above structure, the three rib units 510 are arranged in an undulating manner along the inner wall of the enhanced heat exchange section 400. When the heat exchange medium flows through the enhanced heat exchange section 400, the heat exchange medium undulates between the three rib units 510, thereby making the tumbling of the heat exchange medium more complete, the contact between the heat exchange medium and the inner wall of the enhanced heat exchange section 400 more complete, and the heat exchange effect better.

[0072] It is understood that in some embodiments of the first aspect of the present invention, the height of at least one of the three rib units 510 is not constant. Specifically, the height of one rib unit 510 is not constant, while the heights of the other two rib units 510 are constant. For example, along the axial direction of the heat exchange tube body 100, the three rib units 510 are arranged sequentially on the inner wall of the enhanced heat exchange section 400, wherein the height of the rib unit 510 located on the inner wall of the front section of the enhanced heat exchange section 400 is not constant, while the heights of the rib unit 510 located on the inner wall of the middle section of the enhanced heat exchange section 400 and the rib unit 510 located on the inner wall of the rear section of the enhanced heat exchange section 400 are constant. Alternatively, along the axial direction of the heat exchange tube body 100, three rib units 510 are sequentially arranged on the inner wall of the enhanced heat exchange section 400. The height of the rib unit 510 located on the inner wall of the front section of the enhanced heat exchange section 400 is constant, the height of the rib unit 510 located on the inner wall of the middle section of the enhanced heat exchange section 400 is not constant, and the height of the rib unit 510 located on the inner wall of the rear section of the enhanced heat exchange section 400 is constant. Alternatively, along the axial direction of the heat exchange tube body 100, three rib units 510 are sequentially arranged on the inner wall of the enhanced heat exchange section 400. The height of the rib unit 510 located on the inner wall of the front section and the middle section of the enhanced heat exchange section 400 is constant, while the height of the rib unit 510 located on the inner wall of the rear section of the enhanced heat exchange section 400 is not constant.

[0073] It is understood that in some embodiments of the first aspect of the present invention, the height of two of the three rib units 510 is not constant, while the height of the other rib unit 510 is constant, or the height of all three rib units 510 is not constant, and the specific choice can be made freely according to actual needs.

[0074] In some embodiments of the first aspect of the present invention, the height of the three rib units 510 first increases and then decreases along the direction of heat exchange medium flow inside the heat exchange tube body 100. The three rib units 510 are arranged in an undulating manner along the inner wall of the enhanced heat exchange section 400. When the heat exchange medium flows through the enhanced heat exchange section 400, the heat exchange medium can continuously undulate and roll up and down and come into contact with the inner wall of the enhanced heat exchange section 400, resulting in better heat exchange effect.

[0075] Reference Figure 4In some embodiments of the first aspect of the present invention, the ribs 500 provided on the inner wall of the enhanced heat exchange section 400 are composed of three rib units 510. Each of the three rib units 510 is composed of a plurality of independent protrusions 520 arranged sequentially at intervals. It should be noted that the three rib units 510 may also have one of them composed of a plurality of independent protrusions 520 arranged sequentially at intervals, while the other two rib units 510 are continuous and uninterrupted ribs; or two of them may be composed of a plurality of independent protrusions 520 arranged sequentially at intervals, while the other rib unit 510 is a continuous and uninterrupted rib. The specific arrangement can be determined according to actual conditions. By arranging the rib units 510 as a plurality of independent protrusions 520 arranged sequentially at intervals, the heat exchange medium experiences greater resistance from the rib units 510 when flowing through them, and the contact area between the heat exchange medium and the rib units 510 is larger, resulting in higher heat exchange efficiency.

[0076] In some embodiments of the first aspect of the present invention, all rib units 510 are composed of a plurality of independent protrusions 520 arranged sequentially at intervals, and the protrusion spacing between two adjacent protrusions 520 in each rib unit 510 is different. In this embodiment, the protrusion spacing refers to the spacing between two adjacent protrusions 520 in the same rib unit 510. By adopting the above structure, the rib unit 510 has a stronger turbulence effect on the heat exchange medium.

[0077] It should be noted that, in some embodiments of the first aspect of the present invention, the protrusion spacing between two adjacent protrusions 520 of each rib unit 510 is constant, while the protrusion spacing between different two rib units 510 is different. By adopting the above structure, the enhanced heat exchange section 400 achieves good heat exchange effect when exchanging heat with the heat exchange medium.

[0078] like Figure 4 As shown, in some embodiments of the first aspect of the present invention, each rib unit 510 is composed of a plurality of independent protrusions 520 arranged sequentially at intervals. The protrusions 520 constituting the same rib unit 510 have the same shape, while the protrusions 520 of different rib units 510 have different shapes. The shape of the protrusions 520 can be circular, elliptical, teardrop-shaped, triangular, square, polygonal, or other irregular shapes, depending on actual needs. By setting the protrusions 520 of different rib units 510 to different shapes, different tumbling can occur when the heat exchange medium comes into contact with and collides with different protrusions 520, thereby making the tumbling of the heat exchange medium in the enhanced heat exchange section 400 more complete and thorough, and the heat exchange efficiency higher.

[0079] It is understood that the protrusions 520 of the same rib unit 510 constructed as described above can also be configured to be completely different, that is, the shapes of all the protrusions 520 of the three rib units 510 are different. By adopting the above structure, the rib unit 510 has a more significant turbulence effect on the heat exchange medium, thus the heat exchange effect between the heat exchange medium and the heat exchange tube is stronger.

[0080] To facilitate the production of heat exchange tubes, in some embodiments of the first aspect of the present invention, the rib unit 510 is formed by stamping the outer side wall of the heat exchange tube body 100 and arching it toward the inside of the heat exchange tube body 100. By adopting the above structure, the production of heat exchange tubes can be made simpler and the production cost can be lower.

[0081] Reference Figure 1 and Figure 2 In order to ensure that the heat exchange medium can flow smoothly to the drag-reducing section 300 after passing through the flow-blocking heat exchange effect of the enhanced heat exchange section 400, in some embodiments of the first aspect of the present invention, a transition section 200 is further provided between the enhanced heat exchange section 400 and the drag-reducing section 300. In this embodiment, the inner wall of the transition section 200 is smooth, that is, the inner wall of the transition section 200 is flat and smooth, and there are no other foreign objects.

[0082] By providing the aforementioned transition section 200 inside the heat exchange tube body 100, the heat exchange medium, which becomes spirally turbulent due to the action of the enhanced heat exchange section 400, can be stabilized. The stabilized heat exchange medium then flows to the drag-reducing section 300. It should be noted that when there are at least two sections—the enhanced heat exchange section 400, the transition section 200, and the drag-reducing section 300—they are arranged sequentially along the flow direction of the heat exchange medium inside the heat exchange tube body 100. Specifically, along the axial direction of the heat exchange tube body 100, the enhanced heat exchange section 400, the transition section 200, and the drag-reducing section 300 are arranged sequentially, followed by another enhanced heat exchange section 400, the transition section 200, and the drag-reducing section 300, and so on in a cyclical manner. This allows the heat exchange medium to undergo enhanced heat exchange inside the heat exchange tube body 100 without affecting its flow velocity within the heat exchange tube body 100.

[0083] Reference Figures 1 to 4 ( Figure 2 The direction of the arrow indicates the direction of flow of the heat exchange medium within the heat exchange tube. According to an embodiment of the second aspect of the present invention, a heat exchanger (not shown in the figure) includes fins (not shown in the figure) and the aforementioned heat exchange tube, with the fins sleeved on the outer peripheral wall of the heat exchange tube. By employing the aforementioned heat exchange tube, the heat exchange tube can rapidly transfer heat to the fins, or the heat on the fins can be rapidly transferred to the heat exchange medium through the heat exchange tube, thereby greatly improving the heat exchange efficiency of the heat exchanger.

[0084] Reference Figures 1 to 4 ( Figure 2 The direction of the arrow indicates the direction of the heat exchange medium's flow within the heat exchange tube. According to an embodiment of the third aspect of the present invention, an air conditioner (not shown in the figure) includes the aforementioned heat exchanger. Specifically, the air conditioner can be an indoor unit or an outdoor unit. By employing the aforementioned heat exchanger, the air conditioner's heat exchange efficiency can be greatly improved, and energy consumption reduced.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A heat exchange tube, comprising a heat exchange tube body, characterized in that, The heat exchange tube body has at least two enhanced heat exchange sections, at least two transition sections, and at least two drag-reducing sections. The enhanced heat exchange sections, the transition sections, and the drag-reducing sections are arranged alternately in sequence along the direction of fluid flow inside the heat exchange tube, so that the heat exchange medium can perform enhanced heat exchange inside the heat exchange tube body without affecting the flow rate of the heat exchange medium inside the heat exchange tube body. The inner wall of the drag-reducing section is provided with multiple recessed grooves, which collapse in the direction from the inner wall of the drag-reducing section to the outer wall of the pipe, and the inner wall of the transition section is smooth.

2. The heat exchange tube according to claim 1, characterized in that, The number of the enhanced heat exchange section is at least two, the number of the drag reduction section is at least two, and the enhanced heat exchange section and the drag reduction section are arranged alternately in sequence along the direction of fluid flow in the heat exchange tube.

3. The heat exchange tube according to claim 1, characterized in that, The inner wall of the enhanced heat exchange section is provided with ribs protruding toward the interior of the heat exchange tube body, and the ribs are spirally arranged along the axial direction of the heat exchange tube body.

4. The heat exchange tube according to claim 3, characterized in that, The rib is composed of a rib unit, and the pitch of the rib unit is not constant.

5. The heat exchange tube according to claim 4, characterized in that, Along the direction of fluid flow inside the heat exchange tube, the pitch of the rib unit first decreases and then gradually increases.

6. The heat exchange tube according to claim 3, characterized in that: The rib is composed of a rib unit along the axial direction of the heat exchange tube body, and the height of the rib unit is not constant.

7. The heat exchange tube according to claim 6, characterized in that: Along the direction of fluid flow inside the heat exchange tube, the height of the rib unit first increases and then decreases.

8. The heat exchange tube according to claim 3, characterized in that, The rib is composed of at least two rib units, and all the rib units are arranged sequentially along the axial direction of the heat exchange tube body on the inner wall of the enhanced heat exchange section, and the pitch of two adjacent rib units is different.

9. The heat exchange tube according to claim 8, characterized in that, The number of rib units is at least three, and the pitch of at least one of the rib units is constant. Along the direction of fluid flow in the heat exchange tube, the pitch of the rib first decreases and then gradually increases.

10. The heat exchange tube according to claim 8, characterized in that, The pitch of all the rib units is not constant. Along the direction of fluid flow in the heat exchange tube, the pitch of the ribs first decreases and then gradually increases.

11. The heat exchange tube according to claim 3, characterized in that: The rib is composed of at least two rib units, and all the rib units are arranged sequentially along the axial direction of the heat exchange tube body on the inner wall of the enhanced heat exchange section, and the heights of two adjacent rib units are different.

12. The heat exchange tube according to claim 11, characterized in that: The height of each rib unit is constant.

13. The heat exchange tube according to claim 11, characterized in that: The height of at least one of the rib units is not constant.

14. The heat exchange tube according to any one of claims 11 to 13, characterized in that: The number of rib units is at least three, and the height of the ribs first increases and then decreases along the direction of fluid flow inside the heat exchange tube.

15. The heat exchange tube according to any one of claims 4 to 13, characterized in that, At least one of the rib units is composed of a plurality of independent protrusions arranged at intervals in sequence.

16. The heat exchange tube according to claim 15, characterized in that, The spacing between two adjacent protrusions of the same rib unit is different.

17. The heat exchange tube according to claim 15, characterized in that, The shapes of the protrusions are all different.

18. The heat exchange tube according to any one of claims 8 to 13, characterized in that, At least two of the rib units are composed of a plurality of independent protrusions arranged in sequence at intervals, and the protrusion spacing between two adjacent protrusions of the same rib unit is the same; The spacing between the protrusions of two different rib units is different.

19. The heat exchange tube according to claim 18, characterized in that, The protrusions constituting the same rib unit have the same shape, while the protrusions of different rib units have different shapes.

20. A heat exchanger, characterized in that, Includes the heat exchange tube as described in any one of claims 1 to 19.

21. An air conditioner, characterized in that, Including the heat exchanger as described in claim 20.

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