Heat exchanger and heat exchange system

Abstract

The present application relates to heat exchanger technical field, provide a kind of heat exchanger and heat exchange system.The heat exchanger includes: heat exchange component, heat exchange component includes heat exchange pipe and anti-reverse spoiler, anti-reverse spoiler is located in heat exchange pipe, heat exchange pipe is equipped with first inlet and first outlet, wherein fluid flows to first outlet by first inlet as positive flow;Fluid is positively flowed in heat exchange pipe, and the outer wall surface of anti-reverse spoiler and the inner wall surface of heat exchange pipe form flow channel;Fluid is flowed reversely in heat exchange pipe, and the outer wall surface of anti-reverse spoiler and the inner wall of heat exchange pipe contact to realize plugging.The present application is by being located in heat exchange pipe, fluid positively flows, can reduce positive resistance, disturb fluid, strengthen heat exchange effect;Fluid is flowed reversely, can slowly block the flow of fluid, prevent fluid from flowing reversely, avoid water hammer impact generated by sudden plugging.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more particularly to a heat exchanger and heat exchange system. Background Technology

[0002] Heat exchangers are an important type of industrial process equipment used to achieve heat exchange between cold and hot media in piping process systems. Among the many types of heat exchangers, shell-and-tube heat exchangers are the most widely used due to their high efficiency, stability, and durability. These heat exchangers, through piping process systems, allow cold and hot media to flow within their respective channels, thereby completing the transfer and conversion of heat.

[0003] However, despite the widespread use of shell-and-tube heat exchangers, improving heat transfer efficiency remains a core issue in their development. Currently, a common technique for enhancing tube-side convective heat transfer is the use of inserts. These inserts form specific structures inside the tubes, altering the fluid flow state and increasing the contact area between the fluid and the tube wall, thus improving heat transfer efficiency. However, these inserts are mostly fixed, obstructive structures; while enhancing heat transfer, they also significantly impede fluid flow, increasing tube resistance and reducing the overall system efficiency.

[0004] Furthermore, in piping systems composed of shell-and-tube heat exchangers, fluid backflow is a problem that requires serious attention. Backflow can be caused by various factors, such as drive unit shutdown and increased back pressure, and if left uncontrolled, it can have serious consequences for the system. To prevent backflow, check valves are typically installed in the piping system. Check valves are open during forward flow, allowing fluid to pass through; however, when backflow occurs, the check valve quickly closes, cutting off the backflow of the working fluid. However, check valves also present some problems in use. First, check valves generate some resistance during forward flow, increasing the power consumption of the drive unit. Second, when a check valve suddenly closes, the fluid inside the piping system is abruptly blocked, causing a pressure surge that propagates back and forth along the pipe in the form of a wave, forming what is known as water hammer or water surge. This pressure fluctuation not only impacts the piping system but may also affect the safe operation of the system. Summary of the Invention

[0005] This invention provides a heat exchanger and heat exchange system to solve the problems of high flow resistance, poor energy efficiency, and water hammer accidents caused by abnormal backflow in the operation of heat exchangers in the prior art.

[0006] This invention provides a heat exchanger, comprising: a heat exchange assembly, the heat exchange assembly including a heat exchange tube and a flow deflector, the flow deflector being disposed inside the heat exchange tube, the heat exchange tube having a first inlet and a first outlet, wherein fluid flows from the first inlet to the first outlet in a forward flow; when the fluid flows forward inside the heat exchange tube, a flow channel is formed between the outer wall surface of the flow deflector and the inner wall surface of the heat exchange tube; when the fluid flows in reverse inside the heat exchange tube, the outer wall surface of the flow deflector contacts the inner wall surface of the heat exchange tube to achieve a seal.

[0007] According to a heat exchanger provided by the present invention, the reverse flow deflector includes a first guide rod and a first sealing member. The first guide rod extends axially along the heat exchange tube, and its two ends are fixedly connected to the two ends of the heat exchange tube, respectively. The bottom of the first sealing member is disposed on the outer wall surface of the first guide rod along its circumference, and the top of the first sealing member is inclined toward the first outlet. The first sealing member is an elastic sealing member. When fluid flows in the heat exchange tube, the first sealing member deforms in a direction toward the axial direction of the first guide rod, so that the first sealing member separates from or contacts the inner wall of the heat exchange tube.

[0008] According to a heat exchanger provided by the present invention, there are multiple first sealing members, and the multiple first sealing members are arranged at intervals along the axial direction of the first guide rod.

[0009] According to a heat exchanger provided by the present invention, the reverse flow deflector includes a second guide rod and a second sealing member. The second sealing member is sleeved on the second guide rod, which extends axially along the heat exchange tube. Both ends of the second guide rod are fixedly connected to both ends of the heat exchange tube via elastic connectors. A matching member is wound around the inner wall of the heat exchange tube, and the matching member has a channel. The second sealing member is correspondingly disposed at the channel. When fluid flows in the heat exchange tube, the second guide rod moves back and forth axially along the heat exchange tube, and the second sealing member separates from or contacts the matching member.

[0010] According to a heat exchanger provided by the present invention, the second sealing member has a first surface adjacent to the mating member, the mating member has a second surface, the second surface being disposed corresponding to the first surface; the cross-sectional area of ​​the channel gradually increases from the first inlet to the first outlet, the cross-sectional area of ​​the second sealing member gradually increases from the first inlet to the first outlet, and when the second sealing member is in contact with the mating member, the first surface and the second surface are in contact.

[0011] According to a heat exchanger provided by the present invention, the second sealing element is an elastic sealing element.

[0012] According to a heat exchanger provided by the present invention, there are multiple matching members and multiple second sealing members. The matching members are arranged at intervals along the axial direction of the heat exchange tube, and the second sealing members are arranged at intervals along the axial direction of the second guide rod, and the second sealing members correspond one-to-one with the matching members.

[0013] According to a heat exchanger provided by the present invention, the heat exchanger further includes a housing, a plurality of heat exchange components are provided inside the housing, the housing has a second inlet and a second outlet, each first inlet is connected to the second inlet, and each first outlet is connected to the second outlet.

[0014] The present invention also provides a heat exchange system comprising a heat exchanger as described in any of the preceding claims.

[0015] According to a heat exchange system provided by the present invention, the heat exchange system further includes a drive component and a back pressure component, wherein the output end of the drive component is connected to the first inlet, and the input end of the back pressure component is connected to the first outlet.

[0016] The heat exchanger and heat exchange system provided by the present invention, by placing the reverse flow deflector inside the heat exchange tube, can reduce the forward resistance and disturb the fluid when the fluid flows in the forward direction, thereby enhancing the heat exchange effect; when the fluid flows in the reverse direction, it can slowly block the flow of the fluid, prevent the fluid from flowing in the reverse direction, and avoid water hammer impact caused by sudden blockage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the heat exchanger provided by the present invention; Figure 2 This is a partial structural schematic diagram of the heat exchanger provided by the present invention; Figure 3 This is a schematic diagram of the structure of the first type of heat exchange tube assembly provided by the present invention when the fluid inside the heat exchange tube flows in the forward direction. Figure 4 This is a schematic diagram of the structure of the first type of heat exchange tube assembly provided by the present invention when the fluid inside the heat exchange tube flows in reverse. Figure 5 This is a schematic diagram of the structure of the second type of heat exchange tube assembly provided by the present invention when the fluid inside the heat exchange tube flows in the forward direction. Figure 6 This is a schematic diagram of the structure of the second type of tube heat pipe assembly when the medium inside the heat exchange tube flows in reverse according to the present invention. Figure label: 100. Heat exchange assembly; 110. Heat exchange tube; 111. First inlet; 112. First outlet; 113. Matching component; 1131. Second surface; 1132. Channel; 120. Reverse flow deflector a; 121. First guide rod; 122. First sealing component; 130. Reverse flow deflector b; 131. Second guide rod; 132. Second sealing component; 1321. First surface; 133. Elastic connector; 200, Housing; 210, Second Inlet; 220, Second Outlet; 300, Drive Assembly; 400, Back Pressure Assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present 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 the embodiments of the present invention.

[0022] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0025] The following is combined Figures 1 to 6 This invention describes the heat exchanger and heat exchange system provided by the present invention.

[0026] The heat exchanger provided in this embodiment of the invention includes a heat exchange assembly 100, which includes a heat exchange tube 110 and a flow deflector. The flow deflector is disposed inside the heat exchange tube 110. The heat exchange tube 110 has a first inlet 111 and a first outlet 112. The fluid flows from the first inlet 111 to the first outlet 112 in a forward flow. When the fluid flows in a forward flow inside the heat exchange tube 110, a flow channel is formed between the outer wall surface of the flow deflector and the inner wall surface of the heat exchange tube 110. When the fluid flows in a reverse flow inside the heat exchange tube 110, the outer wall surface of the flow deflector contacts the inner wall surface of the heat exchange tube 110 to achieve a seal.

[0027] The heat exchange tube 110 is the main component of the heat exchanger. The heat exchange tube 110 is provided with a first inlet 111 and a first outlet 112. The fluid (heat exchange medium) flows in the heat exchange tube 110. The process of the fluid flowing from the first inlet 111 to the first outlet 112 is defined as forward flow, and the process of the fluid flowing from the first outlet 112 to the first inlet 111 is defined as reverse flow.

[0028] The flow deflector is installed inside the heat exchange tube 110 and features "low resistance in the forward direction and high resistance in the reverse direction". Specifically, when the fluid flows in the forward direction inside the heat exchange tube 110, there is a gap between the outer wall surface of the flow deflector and the inner wall surface of the heat exchange tube 110, forming a flow channel. The fluid flows through the flow channel to the first outlet 112, reducing the resistance to forward flow, disturbing the fluid, and enhancing the heat exchange effect of the heat exchange tube 110.

[0029] When the fluid flows in reverse within the heat exchange tube 110, the outer wall of the anti-reverse flow device gradually approaches the inner wall of the heat exchange tube 110. As the reverse flow rate increases, the outer wall of the anti-reverse flow device contacts the inner wall of the heat exchange tube 110, forming a closed structure, thereby preventing the fluid from flowing in reverse. This structure, by slowly blocking the fluid through the anti-reverse flow device, can effectively avoid water hammer impact caused by sudden blockage and ensure the stable operation of the equipment.

[0030] The heat exchanger provided in this embodiment of the invention, by placing a reverse flow deflector inside the heat exchange tube 110, can reduce the forward resistance and disturb the fluid when the fluid is flowing normally, thereby enhancing the heat exchange effect; when the fluid is flowing in reverse, it can slowly block the flow of the fluid, prevent the fluid from flowing in reverse, and avoid water hammer impact caused by sudden blockage.

[0031] refer to Figure 3 and Figure 4 The first heat exchange component provided in this embodiment of the invention includes a reverse flow deflector a 120, which includes a first guide rod 121 and a first sealing member 122. The first guide rod 121 extends axially along the heat exchange tube 110, and its two ends are fixedly connected to the two ends of the heat exchange tube 110, respectively. The bottom of the first sealing member 122 is disposed on the outer wall surface of the first guide rod 121 along the circumference of the first guide rod 121, and the top of the first sealing member 122 is inclined toward the first outlet 112. The first sealing member 122 is an elastic sealing member. When the fluid flows in the heat exchange tube 110, the first sealing member 122 deforms in a direction toward the axial direction of the first guide rod 121, so that the first sealing member 122 separates from or contacts the inner wall of the heat exchange tube 110.

[0032] The flow deflector is installed inside the heat exchange tube 110. The axis of the flow deflector is parallel to the axis of the heat exchange tube 110. The axis of the flow deflector can be consistent with the axis of the heat exchange tube 110. When the fluid flows in the forward direction inside the heat exchange tube 110, the flow deflector and the inner wall of the heat exchange tube 110 form a regular annular flow channel, resulting in good heat exchange effect.

[0033] The first guide rod 121 is disposed inside the heat exchange tube 110, and the axial direction of the first guide rod 121 is parallel to the axial direction of the heat exchange tube 110. The two ends of the first guide rod 121 are fixedly connected to the two ends of the heat exchange tube 110, respectively. The bottom of the first sealing member 122 is disposed on the outer wall surface of the first guide rod 121, and the bottom of the first sealing member 122 extends circumferentially along the first guide rod 121, that is, the bottom of the first sealing member 122 is sleeved on the outer wall surface of the first guide rod 121; the top of the first sealing member 122 is inclined toward the first outlet 112.

[0034] The first guide rod 121 can be made of rigid materials such as alloys, and the cross-section of the first guide rod 121 can be circular, elliptical, or polygonal. The first sealing component 122 is an elastic sealing component, made of a polymer composite material, and has a certain degree of elasticity and strength; for example, the first sealing component 122 is made of polyurethane, neoprene rubber, silicone, etc.

[0035] When the first sealing element 122 is not subjected to external force, it is in a naturally unfolded state. At this time, the outer diameter of the first sealing element 122 is smaller than the inner diameter of the heat exchange tube 110.

[0036] Under normal operating conditions, the fluid, pressurized by the drive assembly 300, enters the heat exchange tube 110 through the first inlet 111. The fluid flows forward within the heat exchange tube 110, flowing along the channel between the first sealing member 122 and the inner wall of the heat exchange tube 110 towards the first outlet 112. During this flow, the first sealing member 122 is compressed towards the first guide rod 121 under the action of the fluid. Figure 3 As shown, the gap between the first sealing element 122 and the inner wall of the heat exchange tube 110 increases, and the resistance of the fluid inside the heat exchange tube 110 decreases.

[0037] In addition, since the first sealing element 122 has good elastic deformation capability, when the fluid flows in the flow channel between the first sealing element 122 and the inner wall of the heat exchange tube 110, the first sealing element 122 vibrates in the flow channel due to the fluid-structure coupling effect, which further enhances the heat transfer effect in the heat exchange tube 110 and improves the heat transfer coefficient of the heat exchanger.

[0038] When the drive assembly 300 malfunctions and stops operating, the heat exchange tube 110 experiences backflow under the action of the back pressure assembly 400. That is, fluid enters the heat exchange tube 110 through the first outlet 112 and flows towards the first inlet 111. Driven by the fluid, the first sealing member 122 deflects towards the first inlet 111, increasing its outer diameter. As the fluid flow rate increases, the outer diameter of the first sealing member 122 gradually increases. When the flow rate of the backflowing fluid reaches a certain level, the outer diameter of the first sealing member 122 becomes the same as the inner wall of the heat exchange tube 110. At this point, the outer wall of the first sealing member 122 contacts the inner wall of the heat exchange tube 110, forming a closed structure. Figure 4 As shown, this prevents the fluid inside the heat exchange tube 110 from flowing back.

[0039] In this embodiment of the invention, the first sealing element 122 gradually increases in size according to the increase of fluid flow rate in the heat exchange tube 110, that is, the first sealing element 122 slowly seals, which can avoid water hammer impact caused by sudden sealing.

[0040] Furthermore, there are multiple first sealing elements 122, which are spaced apart along the axial direction of the first guide rod 121.

[0041] In this embodiment of the invention, multiple first sealing elements 122 are provided on the first guide rod 121. When the fluid in the heat exchange tube 110 flows in the forward direction, the first sealing elements 122 have good elastic deformation capabilities. When the fluid flows in the flow channel between the first sealing elements 122 and the inner wall of the heat exchange tube 110, due to fluid-structure interaction, the multiple first sealing elements 122 vibrate within the flow channel, enhancing the heat transfer effect in the heat exchange tube 110 and improving the heat transfer coefficient of the heat exchanger. When the fluid in the heat exchange tube 110 flows in the reverse direction, the flow of the fluid can be better blocked, resulting in a good sealing effect.

[0042] refer to Figure 5 and Figure 6 The second heat exchange component provided in this embodiment of the invention includes a reverse flow deflector b 130, which includes a second guide rod 131 and a second sealing member 132. The second sealing member 132 is sleeved on the second guide rod 131. The second guide rod 131 extends axially along the heat exchange tube 110. The two ends of the second guide rod 131 are fixedly connected to the two ends of the heat exchange tube 110 through elastic connectors 133. A matching member 113 is wound around the inner wall of the heat exchange tube 110. The matching member 113 has a channel 1132. The second sealing member 132 is correspondingly disposed at the channel 1132. When the fluid flows in the heat exchange tube 110, the second guide rod 131 moves back and forth along the axial direction of the heat exchange tube 110, and the second sealing member 132 separates from or contacts the matching member 113.

[0043] The second guide rod 131 extends axially along the heat exchange tube 110. Both ends of the second guide rod 131 are connected to both ends of the heat exchange tube 110 via elastic connectors 133. Specifically, one end of the elastic connector 133 is fixedly connected to the second guide rod 131, and the other end is fixedly connected to the heat exchange tube 110. When fluid flows within the heat exchange tube 110, the second guide rod 131 can move back and forth axially along the heat exchange tube 110. The elastic connector 133 can be a spring.

[0044] The inner wall of the heat exchange tube 110 is provided with a matching member 113, and the middle part of the matching member 113 has an opening to form a channel 1132. The axial direction of the channel 1132 is parallel to the axial direction of the heat exchange tube 110, and the fluid can flow in the heat exchange tube 110 through the channel 1132. The second sealing member 132 is sleeved on the second guide rod 131, and the second sealing member 132 is located at the corresponding position of the channel 1132.

[0045] Under normal operating conditions, the fluid, under the pressurized drive of the drive assembly 300, enters the heat exchange tube 110 through the first inlet 111. The fluid flows forward within the heat exchange tube 110. The second guide rod 131 moves axially along the heat exchange tube 110 towards the first outlet 112. The second sealing member 132 separates from the matching member 113, and a gap exists between the second sealing member 132 and the matching member 113; that is, a gap exists between the outer wall surface of the second sealing member 132 and the inner wall surface of the channel 1132. Figure 5 As shown, this gap forms a flow channel for fluid flow.

[0046] In addition, since the elastic connector 133 has good elastic deformation recovery ability, when the fluid flows in the heat exchange tube 110, the elastic limiting member will undergo elastic reciprocating motion, causing the gap between the second sealing member 132 and the inner wall of the channel 1132 to change continuously, thereby disturbing the fluid in the heat exchange tube 110, enhancing the heat exchange of the heat exchange tube 110, and improving the heat transfer coefficient of the heat exchanger.

[0047] When the drive assembly 300 malfunctions and stops operating, under the action of the back pressure assembly 400, the fluid flows in reverse within the heat exchange tube 110. The second guide rod 131 moves axially along the heat exchange tube 110 toward the first inlet 111. The second sealing member 132 gradually approaches the matching member 113, and the gap between the second sealing member 132 and the matching member 113 gradually decreases, that is, the gap between the outer wall surface of the second sealing member 132 and the inner wall surface of the channel 1132 gradually decreases until the second sealing member 132 contacts the matching member 113. At this time, the second sealing member 132 is embedded in the channel 1132, forming a closed structure, such as... Figure 6 As shown, this prevents backflow of fluid within the heat exchange tube 110. In this embodiment of the invention, the second sealing element 132 slowly seals as the flow rate of fluid within the heat exchange tube 110 increases, avoiding water hammer impact caused by sudden sealing.

[0048] Furthermore, the second sealing member 132 has a first surface 1321 adjacent to the matching member 113, and the matching member 113 has a second surface 1131, which is correspondingly disposed with the first surface 1321; the cross-sectional area of ​​the channel 1132 gradually increases from the first inlet 111 to the first outlet 112, and the cross-sectional area of ​​the second sealing member 132 gradually increases from the first inlet 111 to the first outlet 112. When the second sealing member 132 is in contact with the matching member 113, the first surface 1321 and the second surface 1131 are in contact.

[0049] In one embodiment, the maximum cross-sectional area of ​​the second blocking member 132 is greater than or equal to the maximum cross-sectional area of ​​the channel 1132, and the minimum cross-sectional area of ​​the second blocking member 132 is less than or equal to the minimum cross-sectional area of ​​the channel 1132, so as to prevent the second blocking member 132 from moving through the channel 1132 toward the first inlet.

[0050] It should be noted that the first surface 1321 and the second surface 1131 correspond to each other. The first surface 1321 and the second surface 1131 have the same tilt angle and the same shape. When the fluid in the heat exchange tube 110 flows in the opposite direction, the first surface 1321 and the second surface 1131 can achieve the effect of fitting and sealing.

[0051] Furthermore, the second sealing element 132 can be configured as a rotating body, such as a conical rotating body, which can be made of an elastic material. The conical surface of the conical rotating body is the first surface 1321, and the second surface 1131 of the matching element 113 is opposite to the conical surface of the conical rotating body. It should be noted that in the axial direction of the heat exchange tube 110, a section of the second surface 1131 of the matching element 113 and the conical surface of the conical rotating body must correspond and align, so that when the conical rotating body moves toward the first inlet 111, it can fit against the matching element 113 to achieve sealing.

[0052] The shape of the second sealing member 132 is not specifically limited. The shape and inclination angle of the contact position between the second sealing member 132 and the matching member 113 should be consistent, as long as they fit together.

[0053] The second guide rod 131 can be made of rigid materials such as alloys, and the cross-section of the second guide rod 131 can be circular, elliptical, or polygonal. In this embodiment of the invention, the second sealing element 132 can be an elastic sealing element, which can be made of polymer composite materials and has certain elasticity and strength; when the elastic sealing element contacts the matching element 113, the sealing effect is good.

[0054] In this embodiment of the invention, there are multiple matching components 113 and multiple second sealing components 132. The matching components 113 are arranged at intervals along the axial direction of the heat exchange tube 110, and the second sealing components 132 are arranged at intervals along the axial direction of the second guide rod 131. The second sealing components 132 correspond one-to-one with the matching components 113.

[0055] In this embodiment of the invention, multiple second sealing elements 132 are provided on the second guide rod 131. When the fluid in the heat exchange tube 110 flows in the forward direction, the second guide rod 131 moves back and forth within the heat exchange tube 110, causing the cross-sectional area of ​​the multiple first sealing elements 122 within their corresponding channels 1132 to continuously change, thus disturbing the fluid, enhancing the heat transfer effect within the heat exchange tube 110, and improving the heat transfer coefficient of the heat exchanger. When the fluid in the heat exchange tube 110 flows in the reverse direction, the multiple second sealing elements 132 can better block the fluid flow, resulting in a good sealing effect.

[0056] refer to Figure 2The heat exchanger in this embodiment of the invention also includes a housing 200, which is provided with a plurality of heat exchange components 100. The housing 200 has a second inlet 210 and a second outlet 220. Each first inlet 111 is connected to the second inlet 210, and each first outlet 112 is connected to the second outlet 220.

[0057] The heat exchanger in this embodiment of the invention is a shell-and-tube heat exchanger. The shell 200 is also provided with a third inlet and a third outlet. Fluid can enter between the inner wall of the shell 200 and the outer wall of the heat exchange component 100 through the third inlet for heat exchange. The fluid after heat exchange flows out through the third outlet.

[0058] The heat exchanger provided in this embodiment of the invention can reduce the resistance of the fluid in the heat exchange tube 110 and improve the heat transfer coefficient of the heat exchanger under normal operation; and can effectively prevent backflow in the system.

[0059] The present invention also provides a heat exchange system including the heat exchanger in any of the above embodiments.

[0060] refer to Figure 1 The heat exchange system in this embodiment of the invention also includes a drive component 300. The output end of the drive component 300 is connected to the first inlet 111. Specifically, the heat exchanger includes a shell 200, and the shell 200 is provided with a second inlet 210. The second inlet 210 is connected to the first inlet 111. The output end of the drive component 300 is connected to the second inlet 210, thereby realizing that the output end of the drive component 300 is connected to the first inlet 111, which is used to drive fluid to enter multiple heat exchange components 100 in the shell 200 through the second inlet 210, and then enter the heat exchange tube 110 through the corresponding first inlet 111. A control valve is also provided between the output end of the drive component 300 and the first inlet 111. For example, it can be set between the drive component 300 and the second inlet 210. The control valve can be a flow control valve or a shut-off valve.

[0061] The heat exchanger in this embodiment of the invention also includes a back pressure component 400. The input end of the back pressure component 400 is connected to the first outlet 112. Specifically, the housing 200 is also provided with a second outlet 220, which is connected to the first outlet 112. The input end of the back pressure component 400 is connected to the second outlet 220, thereby realizing the connection between the back pressure component 400 and the first outlet 112. The back pressure component 400 can generate a certain back pressure, which helps to maintain the pressure stability in the system and promotes the exchange and transfer of heat energy.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat exchanger, characterized in that, Includes: a heat exchange assembly, the heat exchange assembly including a heat exchange tube and a flow deflector, the flow deflector being disposed inside the heat exchange tube, the heat exchange tube having a first inlet and a first outlet, wherein the fluid flowing from the first inlet to the first outlet is in a forward flow; When the fluid flows in the heat exchange tube in the forward direction, a flow channel is formed between the outer wall surface of the reverse flow deflector and the inner wall surface of the heat exchange tube; When the fluid flows in the opposite direction inside the heat exchange tube, the outer wall surface of the flow deflector contacts the inner wall surface of the heat exchange tube to achieve a seal. The flow deflector includes a first guide rod and a first sealing element. The first guide rod extends axially along the heat exchange tube, and its two ends are fixedly connected to the two ends of the heat exchange tube, respectively. The bottom of the first sealing element is disposed on the outer wall surface of the first guide rod along its circumference, and the top of the first sealing element is inclined toward the first outlet. The first sealing element is an elastic sealing element. When the fluid flows in the heat exchange tube, the first sealing element deforms in a direction toward the axial direction of the first guide rod, so that the first sealing element separates from or contacts the inner wall of the heat exchange tube. Alternatively, the flow deflector includes a second guide rod and a second sealing element. The second sealing element is sleeved on the second guide rod, which extends axially along the heat exchange tube. Both ends of the second guide rod are fixedly connected to both ends of the heat exchange tube via elastic connectors. A matching element is wound around the inner wall of the heat exchange tube, and the matching element has a channel. The second sealing element is correspondingly located at the channel. When the fluid flows in the heat exchange tube, the second guide rod moves back and forth axially along the heat exchange tube, and the second sealing element separates from or contacts the matching element.

2. The heat exchanger according to claim 1, characterized in that, The deflector includes a first guide rod and a first sealing element. There are multiple first sealing elements, which are spaced apart along the axial direction of the first guide rod.

3. The heat exchanger according to claim 1, characterized in that, The reverse flow deflector includes a second guide rod and a second sealing member. The second sealing member has a first surface adjacent to the matching member, and the matching member has a second surface, which is disposed corresponding to the first surface. The cross-sectional area of ​​the channel gradually increases from the first inlet to the first outlet, and the cross-sectional area of ​​the second sealing member gradually increases from the first inlet to the first outlet. When the second sealing member is in contact with the matching member, the first surface and the second surface are in contact.

4. The heat exchanger according to claim 3, characterized in that, The second sealing element is an elastic sealing element.

5. The heat exchanger according to claim 3, characterized in that, There are multiple matching components and multiple second sealing components. The matching components are spaced apart along the axial direction of the heat exchange tube, and the second sealing components are spaced apart along the axial direction of the second guide rod. Each second sealing component corresponds to one of the matching components.

6. The heat exchanger according to claim 1, characterized in that, The heat exchanger also includes a housing, which contains a plurality of heat exchange components. The housing has a second inlet and a second outlet, each of the first inlets being connected to the second inlet and each of the first outlets being connected to the second outlet.

7. A heat exchange system, characterized in that, Including the heat exchanger as described in any one of claims 1 to 6.

8. The heat exchange system according to claim 7, characterized in that, The heat exchange system further includes a drive component and a back pressure component. The output end of the drive component is connected to the first inlet, and the input end of the back pressure component is connected to the first outlet.

Images