A manifold and heat exchanger
Patent Information
- Application Number
- CN202522074616.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-09-26
AI Technical Summary
现在的微通道换热器一般采用圆形截面的集流管，其虽然承压性能好，但由于扁管需要插入到集流管的中心位置，所以集流管内的有效流通面积仅为其内腔截面的一半，水力半径较小，在高流量工况下的流动阻力较大，饱和温度较大，影响换热效率
本实用新型提供的集流管，连接段与导流段连接，且共同围成管内空腔，连接段沿集流管的径向贯穿设置有插孔，插孔能够供扁管插入，以使扁管与管内空腔连通，导流段的横截面呈半椭圆形，导流段所呈半椭圆形的长轴方向为扁管的长度方向，导流段所呈半椭圆形的短轴方向为扁管的宽度方向，导流段用于对换热介质进行导流。与现有技术相比，本实用新型提供的集流管由于采用了呈半椭圆形设置的导流段以及与导流段连接且开设有插孔的连接段，所以能够增大管内有效流通面积，提高水力半径，降低换热介质的流动阻力和饱和温度，提高换热效率，增强换热效果。
Smart Images
Figure CN224744155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology, and more specifically, to a manifold and a heat exchanger. Background Technology
[0002] Currently, microchannel heat exchangers have become the mainstream heat exchangers in the refrigeration and air conditioning field due to their high heat exchange efficiency and compact structure. Modern microchannel heat exchangers generally use circular cross-section manifolds. While these manifolds have good pressure resistance, the effective flow area inside the manifold is only half of its inner cross-section because the flat tube needs to be inserted into the center. This results in a smaller hydraulic radius, higher flow resistance under high flow conditions, and a higher saturation temperature, all of which affect heat exchange efficiency.
[0003] In view of this, designing and manufacturing a manifold and heat exchanger is particularly important, especially in heat exchanger production. Utility Model Content
[0004] The purpose of this utility model is to provide a manifold that can increase the effective flow area inside the pipe, improve the hydraulic radius, reduce the flow resistance and saturation temperature of the heat exchange medium, improve heat exchange efficiency, and enhance the heat exchange effect.
[0005] Another objective of this invention is to provide a heat exchanger that can increase the effective flow area within the manifold, improve the hydraulic radius, reduce the flow resistance and saturation temperature of the heat exchange medium, improve heat exchange efficiency, and enhance the heat exchange effect.
[0006] This utility model is achieved by the following technical solution.
[0007] A manifold includes a connecting section and a guide section arranged radially along the manifold. The connecting section is connected to the guide section and together they form an inner cavity. The connecting section has an insertion hole that penetrates radially through the manifold, allowing a flat tube to be inserted to communicate with the inner cavity. The cross-section of the guide section is semi-elliptical, with the major axis of the semi-ellipse being the length direction of the flat tube and the minor axis being the width direction of the flat tube. The guide section is used to guide the heat exchange medium.
[0008] Optionally, the minor axis of the semi-elliptical shape of the guide section is located on the end face of the flat tube extending into the cavity inside the tube.
[0009] Optionally, the ratio of the major axis length to the minor axis length of the semi-elliptical shape of the guide section ranges from 1.1 to 3.
[0010] Optionally, the ratio of the major axis length to the minor axis length of the semi-elliptical shape of the guide section is 1.2.
[0011] Optionally, the wall thickness of the manifold satisfies the following relationship: t>nPb 2 / 2a[σ]; In the formula, t is the wall thickness of the manifold, in meters (m); n is the safety factor; P is the internal pressure of the manifold, in MPa; b is the length of the major axis of the semi-ellipse formed by the guide section, in meters (m); a is the length of the minor axis of the semi-ellipse formed by the guide section, in meters (m); and [σ] is the maximum allowable stress of the production material, in MPa.
[0012] Optionally, the flow guiding section includes a first arc-shaped portion and a second arc-shaped portion connected to each other. The first arc-shaped portion and the second arc-shaped portion are symmetrically arranged along the major axis of the semi-ellipse formed by the flow guiding section. Both the first arc-shaped portion and the second arc-shaped portion are used to guide the heat exchange medium.
[0013] Optionally, the connecting section and the guide section are integrally formed or welded together; And / or, the connection between the connecting section and the guide section is a smooth transition.
[0014] Optionally, the cross-section of the connecting section is semi-circular, and the diameter of the semi-circular connecting section is the same as the minor axis length of the semi-ellipse of the guide section.
[0015] Optionally, the cross-section of the connecting section is rectangular, and the width of the rectangle formed by the connecting section is the same as the length of the minor axis of the semi-ellipse formed by the guide section.
[0016] A heat exchanger includes the aforementioned manifold, which includes a connecting section and a guiding section arranged radially along the manifold. The connecting section is connected to the guiding section and together they form an inner cavity. The connecting section has an insertion hole that penetrates radially through the manifold, allowing a flat tube to be inserted to communicate with the inner cavity. The guiding section has a semi-elliptical cross-section, with the major axis of the semi-ellipse being the length direction of the flat tube and the minor axis being the width direction of the flat tube. The guiding section is used to guide the heat exchange medium.
[0017] The manifold and heat exchanger provided by this utility model have the following beneficial effects: The manifold provided by this utility model has a connecting section and a guiding section connected together to form an inner cavity. The connecting section has a through-hole extending radially through the manifold, allowing a flat tube to be inserted to communicate with the inner cavity. The guiding section has a semi-elliptical cross-section, with the major axis of the semi-ellipse aligning with the length of the flat tube and the minor axis aligning with the width of the flat tube. The guiding section is used to guide the heat exchange medium. Compared with existing technologies, the manifold provided by this utility model, due to the use of a semi-elliptical guiding section and a connecting section with a through-hole, can increase the effective flow area within the pipe, improve the hydraulic radius, reduce the flow resistance and saturation temperature of the heat exchange medium, improve heat exchange efficiency, and enhance the heat exchange effect.
[0018] The heat exchanger provided by this utility model includes a manifold, which can increase the effective flow area inside the manifold, improve the hydraulic radius, reduce the flow resistance and saturation temperature of the heat exchange medium, improve heat exchange efficiency, and enhance the heat exchange effect. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the heat exchanger provided in the first embodiment of the present invention; Figure 2 This is a schematic diagram of the connection between the manifold and the flat tube provided in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the manifold structure provided in the first embodiment of the present invention; Figure 4 A cross-sectional view of the manifold provided in the first embodiment of this utility model; Figure 5 This is a schematic diagram of the connection between the manifold and the flat tube provided in the second embodiment of the present invention.
[0021] Icons: 10-Heat exchanger; 100-Manifold; 110-Connecting section; 111-Insertion hole; 120-Guide section; 121-First arc-shaped part; 122-Second arc-shaped part; 130-Pipe cavity; 200-Flat tube. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0025] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" 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 utility model based on the specific circumstances.
[0027] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.
[0028] First Embodiment Please refer to the reference. Figures 1 to 4 This utility model embodiment provides a heat exchanger 10 for heat exchange. It can increase the effective flow area within the manifold 100, improve the hydraulic radius, reduce the flow resistance and saturation temperature of the heat exchange medium, improve heat exchange efficiency, and enhance the heat exchange effect.
[0029] It should be noted that the heat exchanger 10 is a microchannel heat exchanger 10, which includes two manifolds 100 and multiple flat tubes 200. The two manifolds 100 are arranged in parallel and spaced apart, and the multiple flat tubes 200 are arranged in parallel and spaced apart, all connected between the two manifolds 100. The flat tubes 200 are arranged perpendicular to the manifolds 100. The two manifolds 100 and the multiple flat tubes 200 together form a heat exchange channel, which is used to supply the flow of the heat exchange medium to achieve the heat exchange function.
[0030] The manifold 100 includes a connecting section 110 and a guide section 120. The connecting section 110 and the guide section 120 are arranged radially along the manifold 100, connecting section 110 and guide section 120 are connected, and together they form an inner cavity 130. Both the connecting section 110 and the guide section 120 extend along the length of the manifold 100. The connecting section 110 is located on the side of the guide section 120 near the flat tube 200. The connecting section 110 has a through-hole 111 that allows the flat tube 200 to be inserted, enabling communication between the flat tube 200 and the inner cavity 130, and facilitating welding and fixing of the flat tube 200 to the connecting section 110. Specifically, the cross-section of the guide section 120 is semi-elliptical. The major axis of the semi-ellipse is along the length of the flat tube 200, and the minor axis is along the width of the flat tube 200. The guide section 120 is used to guide the heat exchange medium, allowing it to flow within the guide section 120. By setting the guide section 120 in a semi-elliptical shape, the effective flow area inside the tube can be increased, the hydraulic radius can be improved, the flow resistance and saturation temperature of the heat exchange medium can be reduced, the heat exchange efficiency can be improved, and the heat exchange effect can be enhanced.
[0031] In this embodiment, there are multiple insertion holes 111, each insertion hole 111 is used for inserting a flat tube 200, so as to realize the function of communicating multiple flat tubes 200 with the inner cavity 130 at the same time.
[0032] Furthermore, the length direction of the flat tube 200 is perpendicular to the length direction of the manifold 100. The heat exchange medium inside the flat tube 200 can flow along the length direction of the flat tube 200 to the inner cavity 130 of the manifold 100, and the heat exchange medium inside the inner cavity 130 can also flow in the opposite direction to the flat tube 200. During this process, since part of the flat tube 200 is inserted into the insertion hole 111 of the connecting section 110 and extends into the inner cavity 130, this part of the flat tube 200 will block the flow of the heat exchange medium, resulting in a reduction in the effective flow area of the inner cavity 130. Therefore, this utility model adjusts the shape of the side of the manifold 100 away from the insertion hole 111 (that is, the guide section 120) to increase the maximum distance from the outlet of the flat tube 200 to the guide section 120, thereby increasing the effective flow area inside the tube and improving the heat exchange efficiency.
[0033] In this embodiment, the minor axis of the semi-elliptical shape of the guide section 120 is located on the end face of the flat tube 200 extending into the inner cavity 130, and the outlet of the flat tube 200 is also located on the end face of the flat tube 200 extending into the inner cavity 130. That is, the end face of the flat tube 200 extending into the inner cavity 130 is coplanar with the interface between the connecting section 110 and the guide section 120. The maximum distance from the outlet of the flat tube 200 to the guide section 120 is equal to half the length of the major axis of the semi-elliptical shape of the guide section 120. In this way, the volume and space occupied by the entire manifold 100 can be minimized while ensuring the effective flow area inside the pipe, thereby improving the versatility of the manifold 100. However, this is not the only option. In other embodiments, the end face of the flat tube 200 extending into the inner cavity 130 may extend beyond the interface between the connecting section 110 and the guiding section 120, or it may not reach the interface between the connecting section 110 and the guiding section 120. The position of the end face of the flat tube 200 extending into the inner cavity 130 is not specifically limited.
[0034] Furthermore, the ratio of the major axis length to the minor axis length of the semi-ellipse formed by the guide section 120 is in the range of 1.1-3. A reasonable ratio of the major axis length to the minor axis length of the semi-ellipse formed by the guide section 120 can maximize the effective flow area inside the pipe, increase the hydraulic radius, and reduce the flow resistance of the heat exchange medium while ensuring the flow guiding effect.
[0035] In this embodiment, the ratio of the major axis to the minor axis of the semi-elliptical shape of the guide section 120 is 1.2. This increases the effective flow area within the pipe by 20% compared to the existing circular pipe, and raises the hydraulic radius by 4.5%, effectively reducing the flow resistance of the heat exchange medium, improving heat exchange efficiency, and enhancing the heat exchange effect. However, this is not the only limitation. In other embodiments, the ratio of the major axis to the minor axis of the semi-elliptical shape of the guide section 120 can be 1.1 or 3; the specific value of this ratio is not limited.
[0036] Furthermore, the wall thickness of the manifold 100 satisfies the following relationship: t>nPb 2 / 2a[σ]; where t is the wall thickness of the manifold 100 in meters (m); n is the safety factor; P is the internal pressure of the manifold 100 in MPa; b is the major axis length of the semi-ellipse formed by the guide section 120 in meters (m); a is the minor axis length of the semi-ellipse formed by the guide section 120 in meters (m); and [σ] is the maximum allowable stress of the production material in MPa. Specifically, by limiting the wall thickness of the manifold 100, the pressure-bearing capacity of the manifold 100 is improved, preventing deformation or even pipe rupture under the pressure of the heat exchange medium.
[0037] The flow guiding section 120 includes a first arc-shaped portion 121 and a second arc-shaped portion 122 connected to each other. The first arc-shaped portion 121 and the second arc-shaped portion 122 are symmetrically arranged along the major axis of the semi-ellipse formed by the flow guiding section 120, and both the first arc-shaped portion 121 and the second arc-shaped portion 122 are used to guide the heat exchange medium. Specifically, when the heat exchange medium in the flat tube 200 flows out through the outlet of the flat tube 200 into the inner cavity 130 of the tube, the heat exchange medium impacts the first arc-shaped portion 121 and the second arc-shaped portion 122 under the action of inertia, and the first arc-shaped portion 121 and the second arc-shaped portion 122 guide it, so that the heat exchange medium flows in the inner cavity 130 along the length direction of the manifold 100.
[0038] In this embodiment, the connecting section 110 and the flow guiding section 120 are integrally formed to improve the connection strength. The connection between the connecting section 110 and the flow guiding section 120 is smoothly transitioned to further reduce the flow resistance of the heat exchange medium and improve the heat exchange performance. However, this is not the only embodiment. In other embodiments, the connecting section 110 and the flow guiding section 120 are welded together, and the connection between the connecting section 110 and the flow guiding section 120 is smoothly transitioned, which can also achieve the flow guiding function.
[0039] In this embodiment, the cross-section of the connecting section 110 is semi-circular, and the diameter of the semi-circular connecting section 110 is the same as the minor axis length of the semi-ellipse of the guide section 120. That is, the tangent slopes of the connecting section 110 and the guide section 120 at the connection are the same, so as to ensure a smooth transition at the connection between the connecting section 110 and the guide section 120 and reduce the flow resistance of the heat exchange medium.
[0040] The manifold 100 provided in this embodiment of the utility model has a connecting section 110 connected to a guide section 120, which together form an inner cavity 130. The connecting section 110 is provided with an insertion hole 111 through the radial direction of the manifold 100. The insertion hole 111 allows the flat tube 200 to be inserted so that the flat tube 200 communicates with the inner cavity 130. The cross-section of the guide section 120 is semi-elliptical. The major axis of the semi-ellipse formed by the guide section 120 is the length direction of the flat tube 200, and the minor axis of the semi-ellipse formed by the guide section 120 is the width direction of the flat tube 200. The guide section 120 is used to guide the heat exchange medium. Compared with the prior art, the manifold 100 provided by this utility model, due to the use of a semi-elliptical guide section 120 and a connecting section 110 connected to the guide section 120 and having an insertion hole 111, can increase the effective flow area inside the pipe, improve the hydraulic radius, reduce the flow resistance and saturation temperature of the heat exchange medium, improve heat exchange efficiency, and enhance the heat exchange effect. This results in high heat exchange efficiency and good heat exchange effect for the heat exchanger 10.
[0041] Second Embodiment Please refer to Figure 5This utility model embodiment provides a manifold 100. Compared with the first embodiment, the difference in this embodiment is that the shape of the connecting section 110 is different.
[0042] In this embodiment, the cross-section of the connecting section 110 is rectangular, and the width of the rectangle formed by the connecting section 110 is the same as the length of the minor axis of the semi-ellipse formed by the guide section 120. That is, the tangent direction of the guide section 120 at the connection is the same as the side length direction of the connecting section 110 at the connection, so as to ensure a smooth transition at the connection between the connecting section 110 and the guide section 120 and reduce the flow resistance of the heat exchange medium.
[0043] Furthermore, the two corners of the connecting section 110 on the side away from the guide section 120 are rounded to facilitate production and processing, and to facilitate welding and fixing of the connecting section 110 and the flat tube 200.
[0044] The beneficial effects of the manifold 100 provided in this embodiment are the same as those in the first embodiment, and will not be repeated here.
[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A header characterized by, The device includes a connecting section and a flow guiding section arranged radially along the manifold. The connecting section is connected to the flow guiding section and together they form an inner cavity. The connecting section has an insertion hole that penetrates the manifold radially, allowing a flat tube to be inserted to communicate with the inner cavity. The flow guiding section has a semi-elliptical cross-section, with the major axis of the semi-ellipse being the length direction of the flat tube and the minor axis being the width direction of the flat tube. The flow guiding section is used to guide the heat exchange medium.
2. The collector according to claim 1, characterized in that The short axis of the semi-elliptical shape of the guide section is located on the end face of the flat tube that extends into the cavity inside the tube.
3. The collector according to claim 1, wherein The ratio of the major axis length to the minor axis length of the semi-elliptical shape of the guide section ranges from 1.1 to 3.
4. The manifold according to claim 3, characterized in that, The ratio of the major axis length to the minor axis length of the semi-elliptical shape of the guide section is 1.
2.
5. The collector according to any one of claims 1 to 4, characterized in that The wall thickness of the manifold satisfies the following relationship: t > nPb 2 / 2a[σ] In the formula, t is the wall thickness of the manifold, in meters (m); n is the safety factor; P is the internal pressure of the manifold, in MPa; b is the length of the major axis of the semi-ellipse formed by the guide section, in meters (m); a is the length of the minor axis of the semi-ellipse formed by the guide section, in meters (m); and [σ] is the maximum allowable stress of the production material, in MPa.
6. The manifold according to claim 5, characterized in that, The flow guiding section includes a first arc-shaped portion and a second arc-shaped portion connected to each other. The first arc-shaped portion and the second arc-shaped portion are symmetrically arranged along the major axis of the semi-ellipse formed by the flow guiding section. Both the first arc-shaped portion and the second arc-shaped portion are used to guide the heat exchange medium.
7. The manifold according to claim 1, characterized in that, The connecting section is integrally formed or welded to the flow guiding section; And / or, the connection between the connecting section and the guide section is a smooth transition.
8. The manifold according to claim 1, characterized in that, The cross-section of the connecting section is semi-circular, and the diameter of the semi-circular connecting section is the same as the minor axis length of the semi-elliptical shape of the guide section.
9. The collector according to claim 1, wherein The cross-section of the connecting section is rectangular, and the width of the rectangle formed by the connecting section is the same as the length of the minor axis of the semi-ellipse formed by the guide section.
10. A heat exchanger, characterized by Includes the manifold as described in any one of claims 1-9.