Heat exchange tube assembly and evaporative condenser

Abstract

The utility model relates to the technical field of air conditioners, in particular to a heat exchange tube assembly and an evaporative condenser. The heat exchange tube assembly comprises a heat exchange tube and reinforcing ribs, the heat exchange tube is configured to be a straight oval tube, the reinforcing ribs are arranged on the periphery of the heat exchange tube in a sleeving mode and abut against the heat exchange tube, the number of the reinforcing ribs is multiple, and the reinforcing ribs are distributed in the axial direction of the heat exchange tube at intervals. The shape of the reinforcing rib is the same as that of the heat exchange tube. According to the heat exchange tube assembly and the evaporative condenser, the problem that an existing oval tube is prone to deformation under the internal fluid pressure is solved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a heat exchange tube assembly and an evaporative condenser. Background Art

[0002] The evaporative condenser is an important component of the air conditioning system, and usually includes a spray device and a heat exchange tube. The spray device realizes heat exchange with the fluid in the heat exchange tube by spraying water onto the heat exchange tube.

[0003] In related technologies, oval tubes are used in evaporative condensers to effectively improve heat transfer, as they offer advantages over circular tubes, such as improved heat transfer, tighter arrangement, lower flow resistance, lower internal thermal resistance, and increased heat transfer coefficient. However, oval tubes are susceptible to deformation during operation due to internal fluid pressure, such as changing from an oval shape to a circular shape, which affects their heat transfer performance. Utility Model Content

[0004] Based on this, it is necessary to provide a heat exchange tube assembly and an evaporative condenser to solve the problem that the existing elliptical tube is easily deformed under the internal fluid pressure.

[0005] The present application provides a heat exchange tube assembly, which includes a heat exchange tube and a reinforcing rib. The heat exchange tube is configured as a straight elliptical tube. The reinforcing rib is sleeved on the outer circumference of the heat exchange tube and abuts against the heat exchange tube. In addition, there are multiple reinforcing ribs, and the multiple reinforcing ribs are distributed at intervals along the axial direction of the heat exchange tube; wherein the shape of the reinforcing rib is the same as the shape of the heat exchange tube.

[0006] In one embodiment, a plurality of the reinforcing ribs are evenly spaced along the axial direction of the heat exchange tube.

[0007] In one embodiment, a first port and a second port are respectively provided at both ends of the heat exchange tube, and along the axial direction of the heat exchange tube and in the direction from the first port to the second port, the distance between two adjacent reinforcing ribs increases successively.

[0008] In one embodiment, the length of the long axis of the heat exchange tube is d, and the spacing between the plurality of reinforcing ribs is defined as d1, d2, ..., d along the axial direction of the heat exchange tube and from the first port to the second port. n-1 and d n , where d n =d1*q n-1 (1<q≤4), and d1=d.

[0009] In one embodiment, the length of the short axis of the heat exchange tube is a, and the thickness of the reinforcing rib along the axial direction of the heat exchange tube is T, wherein T≤0.25a.

[0010] In one embodiment, the length of the short axis of the heat exchange tube is a, and the height of the reinforcing rib protruding from the surface of the heat exchange tube is H, wherein 0.15≤H / a≤0.3.

[0011] In one embodiment, the heat exchange tube assembly further includes a fin, wherein the fin is provided between two adjacent reinforcing ribs, and an end portion of the fin is connected to the reinforcing rib; wherein the fin is in contact with the outer surface of the heat exchange tube.

[0012] In one embodiment, the fins are arranged at the bottom of the heat exchange tube along the direction of gravity.

[0013] In one embodiment, the number of the fins provided between two adjacent reinforcing ribs is two, and one of the fins is provided at the bottom of the heat exchange tube, and the other fin is provided at the top of the heat exchange tube.

[0014] The present application also provides an evaporative condenser, which includes the heat exchange tube assembly described in any one of the above embodiments.

[0015] Compared to the prior art, the heat exchange tube assembly and evaporative condenser provided in this application effectively increase the overall deformation resistance of the heat exchange tube by providing multiple reinforcing ribs on the exterior of the heat exchange tube, reducing the probability of deformation due to excessive pressure from the fluid flowing within the tube. This effectively prevents the heat exchange tube from changing from an elliptical shape to a circular shape, thereby ensuring the heat exchange efficiency of the heat exchange tube. Furthermore, the reinforcing ribs increase the contact area and contact time between the heat exchange tube and the external cooling medium, increasing air turbulence and thereby improving the heat exchange rate between the external cooling medium and the fluid within the heat exchange tube, further enhancing heat exchange efficiency compared to traditional smooth round tube structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A partial structural diagram of an evaporative condenser according to an embodiment of the present application;

[0018] Figure 2 A schematic structural diagram of a heat exchange tube assembly according to an embodiment of the present application;

[0019] Figure 3 This is a schematic structural diagram of a heat exchange tube assembly according to another embodiment of the present application.

[0020] The symbols in the figure mean the following:

[0021] 100. Heat exchange tube assembly; 10. Heat exchange tube; 101. First port; 102. Second port; 20. Reinforcement rib; 30. Fin; 40. Bend. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0025] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0027] The evaporative condenser is an important component of the air conditioning system, and usually includes a spray device and a heat exchange tube. The spray device realizes heat exchange with the fluid in the heat exchange tube by spraying water onto the heat exchange tube.

[0028] In related technologies, oval tubes are used in evaporative condensers to effectively improve heat transfer, as they offer advantages over circular tubes, such as improved heat transfer, tighter arrangement, lower flow resistance, lower internal thermal resistance, and increased heat transfer coefficient. However, oval tubes are susceptible to deformation during operation due to internal fluid pressure, such as changing from an oval shape to a circular shape, which affects their heat transfer performance.

[0029] See also Figure 1-Figure 3 To address the problem of existing elliptical tubes being easily deformed under internal fluid pressure, the present application provides a heat exchange tube assembly 100, which includes a heat exchange tube 10 and a reinforcing rib 20. The heat exchange tube 10 is configured as a straight elliptical tube. The reinforcing rib 20 is sleeved around the outer circumference of the heat exchange tube 10 and abuts against the heat exchange tube 10. There are multiple reinforcing ribs 20, which are spaced apart along the axial direction of the heat exchange tube 10. The shape of the reinforcing rib 20 is the same as that of the heat exchange tube 10.

[0030] Typically, an elliptical tube will deform when the internal fluid pressure reaches 4MPa, thus losing its heat exchange advantage. However, the present application effectively increases the overall deformation resistance of the heat exchange tube 10 by providing multiple reinforcing ribs 20 on the outside of the heat exchange tube 10, reducing the probability of deformation of the heat exchange tube 10 due to excessive pressure of the fluid flowing inside. In other words, it effectively prevents the heat exchange tube 10 from changing from an elliptical shape to a circular shape, thereby ensuring the heat exchange effect of the heat exchange tube 10. In addition, the reinforcing ribs 20 also increase the contact area and contact time between the heat exchange tube 10 and the external cooling medium, increase air turbulence, and thus improve the heat exchange rate between the external cooling medium and the fluid in the heat exchange tube 10, further improving the heat exchange efficiency compared to the traditional smooth round tube structure.

[0031] like Figure 1As shown, the heat exchange tube assembly 100 also includes an elbow 40, which connects two adjacent heat exchange tubes 10, allowing multiple heat exchange tubes 10 and elbows 40 to be connected to form a coil. The heat exchange tubes 10 are straight tubes extending in a straight line and have an elliptical cross-section. The elbow 40 is U-shaped, and its cross-section can be circular to reduce processing difficulty.

[0032] It should be noted that the fluid flowing in the existing heat exchange tube 10 can usually be set to water or fluorine, among which the pressure change of water flowing in the heat exchange tube 10 is small, while the properties of fluorine will change during the heat exchange process, from gas phase to liquid phase, which also leads to large changes in pressure at different positions in the heat exchange tube 10.

[0033] Based on this, since the pressure variation of water flowing through the heat exchange tube 10 is small, when the medium flowing into the heat exchange tube 10 is water, multiple reinforcing ribs 20 can be evenly spaced along the axial direction of the heat exchange tube 10. In this way, the arrangement of the reinforcing ribs 20 is relatively simple and can prevent deformation of the heat exchange tube 10 caused by excessive water pressure.

[0034] In another embodiment, a first port 101 and a second port 102 are respectively provided at both ends of the heat exchange tube 10. Along the axial direction of the heat exchange tube 10, and in the direction from the first port 101 to the second port 102, the spacing between two adjacent reinforcing ribs 20 increases successively. That is, from the first port 101 to the second port 102, the arrangement of the reinforcing ribs 20 gradually becomes sparse from dense. In this way, the arrangement requirements of the reinforcing ribs 20 when fluorine flows in the heat exchange tube 10 can be met, thereby improving the deformation resistance of the heat exchange tube 10 and effectively ensuring the heat exchange effect of the heat exchange tube 10. Here, after the heat exchange tube 10 is assembled, the first port 101 serves as the inlet of the refrigerant in the heat exchange tube 10, and the second port 102 serves as the outlet of the refrigerant in the heat exchange tube 10.

[0035] Specifically, when the medium flowing into the heat exchange tube 10 is fluorine, the fluorine enters the heat exchange tube 10 in a high-pressure gaseous state through the first port 101. Therefore, the pressure is higher near the first port 101 of the heat exchange tube 10. At this point, by controlling the spacing between adjacent reinforcing ribs 20, the ribs 20 are arranged more densely in this area, which can better withstand the high internal pressure and prevent deformation of the heat exchange tube 10. As the fluorine continues to exchange heat, its pressure gradually decreases and it becomes liquid. At this point, the ribs 20 can be arranged more sparsely, thereby meeting the requirements for preventing deformation of the heat exchange tube 10 while reducing the cost of rib 20 arrangement.

[0036] Furthermore, in one embodiment, if Figure 3 As shown, the length of the long axis of the heat exchange tube 10 is d, and the spacing between the plurality of reinforcing ribs 20 is defined as d1, d2, ..., d along the axial direction of the heat exchange tube 10 and from the first port 101 to the second port 102.n-1 and d n , where d n =d1*q n-1 (1<q≤4), and d1=d. This is beneficial to the arrangement of the reinforcing ribs 20 , thereby improving the structural reinforcement effect of the heat exchange tube 10 .

[0037] In one embodiment, the length of the minor axis of the heat exchange tube 10 is a, and the thickness of the reinforcing rib 20 along the axial direction of the heat exchange tube 10 is T, where T ≤ 0.25a. This ensures both the reinforcement effect and cost reduction. Alternatively, the thickness T of the reinforcing rib 20 along the axial direction of the heat exchange tube 10 can be set to 0.1a, 0.15a, 0.2a, or 0.05a, among other values ​​not listed here.

[0038] Furthermore, in one embodiment, the height of the reinforcing rib 20 protruding from the surface of the heat exchange tube 10 is H, where 0.15 ≤ H / a ≤ 0.3, thereby improving the heat transfer effect of the reinforcing rib 20 and reducing costs. Optionally, the value of H / a can be 0.15, 0.2, 0.25, or 0.3, etc., which are not listed here one by one.

[0039] It should be noted that the length of the major axis of the heat exchange tube 10 refers to the length of the longest line segment that can be obtained by two points on the ellipse, and the length of the minor axis of the heat exchange tube 10 refers to the length of the shortest line segment that can be obtained by two points on the ellipse.

[0040] In one embodiment, if Figure 2 As shown, the heat exchange tube assembly 100 further includes a fin 30, which is disposed between two adjacent reinforcing ribs 20, with the ends of the fin 30 connected to the reinforcing ribs 20. The fin 30 is in contact with the outer surface of the heat exchange tube 10. The provision of the fin 30 not only ensures the positioning and connection between the multiple reinforcing ribs 20, but also further increases the heat exchange area between the heat exchange tube 10 and the outside world, thereby improving the heat exchange efficiency of the heat exchange tube 10.

[0041] Furthermore, the ribs 20 and the fins 30 are integrally formed, which can improve the connection strength between the ribs 20 and the fins 30 , and can easily control the arrangement spacing of the ribs 20 through the fins 30 , thereby reducing the difficulty of arranging the ribs 20 .

[0042] The heat exchange tube assembly 100 of the present application is primarily used in evaporative condensers, which also include a spray device (not shown). The spray device is often located above the coil along the direction of gravity, wherein water sprayed by the spray device flows downwardly across the surfaces of the multiple heat exchange tubes 10. Therefore, when there is only one fin, to prevent the fin 30 from obstructing the flow of water and to ensure the contact area between the fin 30 and the water, thereby improving the heat exchange effect, in one embodiment, the fin 30 is preferably located at the bottom of the heat exchange tube 10 along the direction of gravity to prevent water accumulation. Of course, the fin 30 can also be located at the top of the heat exchange tube 10.

[0043] When there are two fins 30 between two adjacent reinforcing ribs 20, one fin 30 is located at the bottom of the heat exchange tube 10 and the other fin 30 is located at the top of the heat exchange tube 10. This further increases the contact area between the heat exchange tube 10 and the spray water, thereby improving the heat exchange effect.

[0044] Furthermore, in one embodiment, the reinforcing ribs 20 and the fins 30 are configured as corrosion-resistant parts, that is, the reinforcing ribs 20 and the fins 30 can be made of materials with high corrosion resistance, such as stainless steel, aluminum, titanium or brass, etc., and can be reasonably set according to actual needs.

[0045] In one embodiment, the reinforcing rib 20 is expanded to the outer wall of the heat exchange tube 10. This facilitates the connection between the reinforcing rib 20 and the heat exchange tube 10 and improves the connection strength of the reinforcing rib 20.

[0046] The present application also provides an evaporative condenser, comprising a spray device and a heat exchange tube assembly 100 according to any of the above embodiments. There are multiple heat exchange tube assemblies 100, with the heat exchange tubes 10 in the multiple heat exchange tube assemblies 100 connected in series to form a coil. The spray device is disposed above the heat exchange tube assembly 100 in the direction of gravity and is used to spray cooling water onto the heat exchange tube assembly 100 to achieve heat exchange with the heat exchange tube assembly 100.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0048] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A heat exchange tube assembly, characterized in that: The invention comprises a heat exchange tube (10) and a reinforcing rib (20), wherein the heat exchange tube (10) is configured as a straight elliptical tube, the reinforcing rib (20) is sleeved on the outer periphery of the heat exchange tube (10) and abuts against the heat exchange tube (10), and the number of the reinforcing ribs (20) is multiple, and the multiple reinforcing ribs (20) are distributed at intervals along the axial direction of the heat exchange tube (10); Wherein, the shape of the reinforcing rib (20) is the same as the shape of the heat exchange tube (10).

2. The heat exchange tube assembly according to claim 1, characterized in that: The plurality of reinforcing ribs (20) are evenly spaced along the axial direction of the heat exchange tube (10).

3. The heat exchange tube assembly according to claim 1, characterized in that: A first port (101) and a second port (102) are respectively provided at both ends of the heat exchange tube (10), and along the axial direction of the heat exchange tube (10), and in the direction from the first port (101) to the second port (102), the distance between two adjacent reinforcing ribs (20) increases successively.

4. The heat exchange tube assembly according to claim 3, characterized in that: The length of the long axis of the heat exchange tube (10) is d, and along the axial direction of the heat exchange tube (10), and in the direction from the first port (101) to the second port (102), the spacings between the plurality of reinforcing ribs (20) are defined as d1, d2, ..., d n-1 and d n , where d n =d1*q n-1 (1<q≤4), and d1=d.

5. The heat exchange tube assembly according to claim 1, characterized in that: The length of the short axis of the heat exchange tube (10) is a, and the thickness of the reinforcing rib (20) along the axial direction of the heat exchange tube (10) is T, wherein T≤0.25a.

6. The heat exchange tube assembly according to claim 1, characterized in that: The length of the short axis of the heat exchange tube (10) is a, and the height of the reinforcing rib (20) protruding from the surface of the heat exchange tube (10) is H, wherein 0.15≤H / a≤0.

3.

7. The heat exchange tube assembly according to any one of claims 1 to 6, characterized in that: The heat exchange tube assembly further comprises a fin (30), wherein the fin (30) is arranged between two adjacent reinforcing ribs (20), and an end portion of the fin (30) is connected to the reinforcing rib (20); Wherein, the fin (30) is in contact with the outer surface of the heat exchange tube (10).

8. The heat exchange tube assembly according to claim 7, characterized in that: Along the direction of gravity, the fin (30) is arranged at the bottom of the heat exchange tube (10).

9. The heat exchange tube assembly according to claim 7, characterized in that: The number of the fins (30) provided between two adjacent reinforcing ribs (20) is two, and one of the fins (30) is provided at the bottom of the heat exchange tube (10), and the other fin (30) is provided at the top of the heat exchange tube (10).

10. An evaporative condenser, characterized in that: The heat exchange tube assembly comprises the heat exchange tube assembly according to any one of claims 1 to 9.

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