A modular heat exchange installation structure for industrial hvac retrofit

Abstract

The application relates to the technical field of heat exchange, and discloses a modular heat exchange mounting structure for industrial heating and ventilation reconstruction, which comprises two end cylinders and multiple heat exchange cylinders; the multiple heat exchange cylinders are longitudinally and sequentially butted and assembled between the two end cylinders, heat exchange flow channels are arranged between the two end cylinders and the multiple heat exchange cylinders, and air pipes, which are in communication with the heat exchange flow channels, are connected to the end cylinders; the end cylinders and the heat exchange cylinders are both half-split split structure, and fastening mechanisms for fastening and fixing are arranged at the split connection positions of the end cylinders and the heat exchange cylinders; and multiple spiral fins are fixedly arranged in the heat exchange cylinders. Through cooperation of the end cylinders and the heat exchange cylinders, the whole is modularized and designed in a half-split split mode, the end cylinders and the heat exchange cylinders can be individually split and stored, the volume of the split single piece is smaller, and the warehouse occupation and long-distance transportation difficulty are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and more specifically to a modular heat exchange installation structure for industrial HVAC retrofitting. Background Technology

[0002] In industrial HVAC retrofitting, to achieve the recovery and reuse of waste heat from chimneys, the commonly used heat exchange structure is the serpentine heat exchange pipe. This type of structure mainly consists of a continuously bent serpentine pipe, a support assembly for fixing, and inlet and outlet medium connection pipes. Its core purpose is to collect the waste heat emitted during the chimney's emission by tightly wrapping the serpentine pipe around the outer wall of the chimney and conducting heat through direct contact between the pipe and the chimney wall. This heat is then used to heat the cold air, cold water, and other media flowing inside the pipe. The preheated media can then be connected to the HVAC circulation system for building heating or industrial heat, achieving the goal of energy conservation and emission reduction. There are two main types of installation methods. One type involves the prefabricated serpentine pipe assembly being hoisted to the corresponding height of the chimney using large lifting equipment and then secured to the outer wall of the chimney with supports. The other type involves laying the pipe in sections on-site, completing the pipe connection through welding, and then fixing it with supports to ensure that the pipe remains in close contact with the chimney wall.

[0003] However, the existing technology has the following problems:

[0004] Prefabricated serpentine pipes are large in size and require a lot of space during the prefabrication, transportation and hoisting stages, which leads to problems in storage, transportation and hoisting. On the other hand, on-site welded heat exchange pipes require more manpower, have a longer construction period and are more labor-intensive. Summary of the Invention

[0005] The purpose of this invention is to provide a modular heat exchange installation structure for industrial HVAC retrofitting in order to solve the above-mentioned problems. It aims to overcome the problems of existing serpentine heat exchange pipes, which are inconvenient to install and have poor construction efficiency. On-site welded heat exchange pipes, on the other hand, require a lot of manpower, have a long construction period, and are labor-intensive. Details are described below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a modular heat exchange installation structure for industrial HVAC retrofitting, comprising two end cylinders and multiple heat exchange cylinders; the multiple heat exchange cylinders are longitudinally and sequentially assembled between the two end cylinders, and a heat exchange channel is provided between the two end cylinders and the multiple heat exchange cylinders; a duct connected to the end cylinders and communicating with the heat exchange channel is provided; both the end cylinders and the heat exchange cylinders are split structures with half-joints, and the split connection points of the end cylinders and the heat exchange cylinders are respectively provided with fastening mechanisms for fastening and fixing; multiple spiral blades are fixedly arranged inside the heat exchange cylinders, and the multiple spiral blades inside the multiple heat exchange cylinders divide the heat exchange channel into multiple spiral channels, and the two ends of the multiple spiral channels respectively converge in the two end cylinders.

[0008] Preferably, the spiral blades in the two halves of the same heat exchange cylinder are joined together, and the spiral blades in axially adjacent heat exchange cylinders are connected end to end in sequence.

[0009] Preferably, the inner side of the heat exchange cylinder is provided with a plurality of fins arranged in a circumferential array, and the fins have elastic deformation capability.

[0010] Preferably, the top of both the end cylinder and the heat exchange cylinder is connected to a positioning block, and the bottom of both the end cylinder and the heat exchange cylinder is provided with a positioning groove, and the positioning block can be embedded and slid into the positioning groove.

[0011] Preferably, the split connection between the end cylinder and the heat exchange cylinder is provided with an installation position and a fastening groove, respectively. The fastening mechanism is installed in the installation position and can be embedded in the fastening groove to achieve fastening.

[0012] Preferably, the fastening mechanism includes a mounting block and two wedges. The mounting block is installed in the mounting position, and the wedges are slidably connected in the mounting block. A spring is provided between the two wedges. The wedges are provided with inclined surfaces. During the process of embedding into the fastening groove, the wedges are retracted into the mounting block by sliding cooperation between their inclined surfaces and the edge of the fastening groove.

[0013] Preferably, a sliding rod is slidably connected inside the mounting block, and a lead screw is threaded inside the mounting block. The lead screw is rotatably connected to the sliding rod. Two sliding shafts are connected to the sliding rod, and groove plates are connected to the two wedges respectively. The groove plates are provided with inclined grooves, and the two sliding shafts are slidably connected to the inclined grooves of the two groove plates respectively. When the two sliding shafts move towards the wedges, they can drive the two wedges to retract into the mounting block through the inclined grooves.

[0014] Preferably, the end cylinder is fixed to the heat exchange cylinder and adjacent heat exchange cylinders by bolts.

[0015] Preferably, the heat exchange cylinder is provided with multiple flow turbulence mechanisms, which are located in multiple spiral flow channels. Each flow turbulence mechanism includes a fixed shaft and two guide plates. The fixed shaft is installed on the inner wall of the heat exchange cylinder, and the two guide plates are rotatably connected to the fixed shaft. The guide plates are V-shaped and have raised edges at both ends.

[0016] Preferably, the turbulence mechanism further includes a rotating shaft, which is rotatably mounted on the inner wall of the heat exchange cylinder. A fan wheel is connected to the outer wall of the rotating shaft, and two cams are connected to the outer wall of the rotating shaft. A driven frame is connected to each of the two guide plates, and the two cams are located inside the two driven frames. When the cams rotate, they can drive the guide plates to swing back and forth through the driven frames. The two cams protrude in opposite directions.

[0017] The beneficial effects are:

[0018] 1. This modular heat exchange installation structure for industrial HVAC retrofitting uses the cooperation of end cylinders and heat exchange cylinders to achieve a modular design with multiple sections spliced ​​together and half-assembled. The modular disassembly design allows the end cylinders and each heat exchange cylinder to be separated and stored independently. After disassembly, the individual parts are smaller, which greatly reduces the storage space and the difficulty of long-distance transportation. On-site, each section can be aligned and assembled. With the setting of the fastening mechanism, the difficulty of installation and construction is reduced and the installation efficiency is improved.

[0019] 2. The modular heat exchange installation structure for industrial HVAC retrofitting, through the setting of the turbulence mechanism, allows the two guide plates to alternately oscillate when the gas flows in the spiral channel, effectively disturbing the airflow in the spiral channel, destroying the heat exchange boundary layer, eliminating the flow dead zone, and significantly improving the convective heat transfer coefficient between the airflow and the cylinder wall and heat-conducting fins. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the spiral blade structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the heat exchanger cylinder structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the end tube structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the fin structure of the present invention;

[0026] Figure 6 This is an exploded schematic diagram of the heat exchanger cylinder of the present invention;

[0027] Figure 7 This is a schematic diagram of the fastening mechanism of the present invention;

[0028] Figure 8 This is a schematic diagram of the groove plate structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the turbulence-disrupting mechanism of the present invention;

[0030] Figure 10 This is a schematic diagram of the driven frame structure of the present invention.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. End tube; 11. Air duct;

[0033] 2. Heat exchanger cylinder; 21. Spiral blades; 22. Fins;

[0034] 3. Fastening mechanism; 31. Mounting block; 32. Wedge block; 33. Groove plate; 34. Lead screw; 35. Slide rod; 36. Slide shaft;

[0035] 4. Aerodynamic spoiler; 41. Fixed shaft; 42. Guide vane; 43. Driven frame; 44. Rotating shaft; 45. Impeller; 46. Cam;

[0036] 5. Positioning block; 6. Positioning groove. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0038] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0039] Throughout this specification, references to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in one embodiment" or "in another embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0040] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 this application 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 application.

[0041] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0042] Please see Figure 1 - Figure 5 In one embodiment:

[0043] A modular heat exchange installation structure for industrial HVAC retrofitting includes two end cylinders 1 and multiple heat exchange cylinders 2. The multiple heat exchange cylinders 2 are longitudinally and sequentially assembled between the two end cylinders 1. The end cylinders 1 and heat exchange cylinders 2, as well as adjacent heat exchange cylinders 2, are fixed with bolts. A heat exchange channel is provided between the two end cylinders 1 and the multiple heat exchange cylinders 2. A duct 11 communicating with the heat exchange channel is connected to the end cylinders 1. The two end cylinders 1 are located at both ends of the entire heat exchange channel, and the multiple heat exchange cylinders 2 in the middle form a multi-section spliced ​​structure. After the multiple heat exchange cylinders 2 are longitudinally connected, they form a closed integral cavity with a complete heat exchange flow channel inside. Two air ducts 11 serve as gas inlet and outlet ports, connecting to external HVAC pipelines to achieve airflow. Adjacent cylinders are fixed with bolts to achieve axial quick locking and positioning. The modular disassembly design allows the end cylinder 1 and each heat exchange cylinder 2 to be separated and stored independently. After disassembly, the individual parts are smaller, greatly reducing the storage space and the difficulty of long-distance transportation. On-site, they can be aligned and assembled section by section, reducing the difficulty of installation and construction and improving installation efficiency.

[0044] Furthermore, both end cylinder 1 and heat exchange cylinder 2 are split-type structures that are assembled in half. The split connection points of end cylinder 1 and heat exchange cylinder 2 are respectively equipped with fastening mechanisms 3 for fastening and fixing. The split-type structure of the half-assembled parts facilitates the installation of end cylinder 1 and heat exchange cylinder 2 to the outside of the chimney. Before installation, each end cylinder 1 and heat exchange cylinder is divided into two parts. For example, when installing heat exchange cylinder 2, the two parts are spliced ​​from both sides of the chimney towards the middle. After being fastened by the fastening mechanism 3, a complete heat exchange cylinder 2 is formed. The split-type structure of end cylinder 1 and heat exchange cylinder 2 can be directly assembled on the side of the chimney. The fastening mechanism 3 is arranged at the split splice position. After the two halves are aligned and closed, they can be quickly snapped and locked without additional welding or a large number of fasteners, which greatly improves the assembly efficiency. The joint parts of end cylinder 1 and heat exchange cylinder 2 are equipped with sealing strips, which provide a good sealing effect after the joint is made, ensuring the airtightness of the heat exchange channel.

[0045] Specifically, multiple spiral blades 21 are fixedly installed inside the heat exchange cylinder 2. The multiple spiral blades 21 in the heat exchange cylinder 2 divide the heat exchange channel into multiple spiral channels. The two ends of the multiple spiral channels converge in two end cylinders 1 respectively. The spiral blades 21 in the two halves of the same heat exchange cylinder 2 are spliced ​​together and connected to each other. The spiral blades 21 in the axially adjacent heat exchange cylinder 2 are connected end to end in sequence. The spiral blades 21 on the two halves of the same heat exchange cylinder 2 are precisely aligned and spliced ​​to ensure that there are no broken gaps in the internal channel of a single cylinder. The spiral blades 21 in the axially adjacent heat exchange cylinder 2 are seamlessly connected end to end, so that the internal spiral channel of the multiple heat exchange cylinder 2 is formed. Compared with the straight channel, the spiral direction can significantly extend the flow path of the gas medium in the heat exchange cylinder 2, increase the heat exchange contact time between the airflow and the cylinder wall and the external chimney heat source. At the same time, the spiral channel can force the airflow to generate swirling disturbance, destroy the boundary layer of the fluid attached to the wall, and enhance the convective heat transfer capacity, thus improving the overall heat exchange effect simultaneously from both the perspective of path and flow state.

[0046] Furthermore, multiple fins 22 are arranged in a circumferential array on the inner side of the heat exchange cylinder 2. The fins 22 have elastic deformation capability. The multiple fins 22 are slightly tilted in the initial state. After the heat exchange cylinder 2 contacts the outer wall of the chimney, the multiple fins 22 inside the heat exchange cylinder 2 all abut against the outer wall of the heat exchange cylinder and deform accordingly, keeping each fin 22 independently abutting against the outer wall of the heat exchange cylinder. The circumferentially arranged elastic fins 22 cover the outer wall of the chimney in all directions, and adapt to the concavity and convexity of the outer wall of the chimney by their own elastic deformation. The fins 22 are made of a high thermal conductivity material and can quickly absorb the waste heat from the outer wall of the chimney. They can evenly transfer the heat to the inner wall of the heat exchange cylinder 2 and the periphery of the spiral flow channel, forming an efficient heat exchange effect with the internal flowing gas. At the same time, the elastic structure of the fins 22 can buffer the thermal expansion and contraction and vibration during the operation of the chimney, avoid the deformation and cracking of the heat exchange cylinder 2 caused by rigid compression, and maintain the stable and heat-conducting state of the heat exchange cylinder 2 for a long time.

[0047] In addition, both the top of the end cylinder 1 and the heat exchange cylinder 2 are connected to positioning blocks 5, and the bottom of both the end cylinder 1 and the heat exchange cylinder 2 are provided with positioning grooves 6. The positioning blocks 5 can be embedded and slid into the positioning grooves 6. The positioning blocks 5 and the positioning grooves 6 serve a positioning function. For example, when splicing the end cylinder 1 and the heat exchange cylinder 2, the angle of the heat exchange cylinder 2 needs to be adjusted so that the positioning groove 6 at the bottom of the heat exchange cylinder 2 is aligned with the positioning block 5 at the top of the end cylinder 1. Then, the heat exchange cylinder 2 is slid towards the chimney so that the positioning block 5 is embedded in the positioning groove 6. The opening of the positioning groove 6 is provided with The chamfering facilitates the alignment and sliding of the positioning block 5. After the positioning block 5 is fully slid into the positioning groove 6, the docking of the heat exchange cylinder 2 and the end cylinder 1 is completed, and the docking angle is accurate. The positioning groove 6 and the positioning block 5 also play the role of angle limiting, so that the spiral blades 21 in the heat exchange cylinder 2 installed in sequence can be accurately connected, ensuring the smooth flow of the spiral channel. After the positioning block 5 and the positioning groove 6 are accurately positioned in advance, they are fixed with bolts, which greatly improves the coaxiality and assembly accuracy of the multi-section heat exchange cylinder 2 assembly, ensuring the overall structural regularity and smooth flow channel.

[0048] In this embodiment, the optimal operating wind speed is 3.5 to 5.0 m / s. At this wind speed, the airflow swirling disturbance is sufficient, and the heat exchange efficiency and system resistance reach the best balance.

[0049] Please see Figure 3 , Figure 7 , Figure 8 In another embodiment:

[0050] The split connection between end cylinder 1 and heat exchange cylinder 2 is provided with mounting positions and fastening grooves respectively. Fastening mechanism 3 is installed in the mounting position and can be embedded in the fastening groove to achieve fastening. The split connection between end cylinder 1 and heat exchange cylinder 2 is provided with multiple mounting positions and corresponding fastening grooves for setting multiple fastening mechanisms 3, thereby improving fastening stability. At the same time, the embedded engagement of fastening mechanism 3 and fastening groove can improve the joint strength and sealing of splice seam, effectively resist the risk of structural loosening caused by airflow vibration and environmental temperature difference, and maintain the overall stability of end cylinder 1 and heat exchange cylinder 2 after splicing for a long time.

[0051] It is worth noting that the fastening mechanism 3 includes a mounting block 31 and two wedges 32. The mounting block 31 is installed in the mounting position, and the wedges 32 are slidably connected in the mounting block 31. A spring is provided between the two wedges 32. The wedges 32 have inclined surfaces. During the process of embedding into the fastening groove, the wedges 32 retract into the mounting block 31 by slidingly engaging their inclined surfaces with the edge of the fastening groove. The mounting block 31 serves as a base fixed inside the mounting position, providing a stable mounting reference for the wedges 32. The spring between the two wedges 32 continuously applies an outward pushing force. The pre-tightening force of the push keeps the wedge 32 in an extended state under normal conditions. During assembly, relying on the guiding effect of the outer inclined surface of the wedge 32, the edge of the fastening groove squeezes the inclined surface, automatically pushing the two wedges 32 to retract into the mounting block 31. After closing, the spring rebound pushes the wedge 32 into the other edge of the fastening groove, forming a mechanical anti-detachment fastening. This allows the two parts of the end cylinder 1 or heat exchange cylinder 2 to be directly connected and assembled during actual installation. The corresponding fastening mechanism 3 automatically achieves fastening, making the operation more convenient and improving assembly efficiency.

[0052] It is worth noting that a sliding rod 35 is slidably connected inside the mounting block 31. A flat key is provided on the sliding rod 35, which is slidably installed inside the mounting block 31 via the flat key. The sliding rod 35 can only slide axially and cannot rotate circumferentially. A lead screw 34 is threaded inside the mounting block 31, and the lead screw 34 is rotatably connected to the sliding rod 35. The end of the lead screw 34 away from the sliding rod 35 has an internal hexagonal thread and protrudes from the mounting block 31. Two sliding shafts 36 are connected to the sliding rod 35. Grooves 33 are connected to the two wedges 32, and inclined grooves are provided on the grooves 33. The two sliding shafts 36 are slidably connected to the inclined grooves of the two grooves 33, respectively. When the two sliding shafts 36 move towards the wedges 32... The inclined groove can drive two wedges 32 to retract into the mounting block 31. When disassembly is required, after removing the bolts, the screw 34 is rotated through the internal hexagonal thread, causing the screw 34 to drive the slide rod 35 to slide. The slide rod 35 drives two sliding shafts 36 to move synchronously towards the wedges 32, so that the sliding shafts 36 apply force to the inclined groove, thereby driving the two groove plates 33 to move closer to each other. When the groove plates 33 move, they drive the wedges 32 to move synchronously, thereby causing the two wedges 32 to move closer to each other and squeeze the spring. Finally, the wedges 32 retract into the mounting block 31. At this time, the operator can separate the end cylinder 1 or the heat exchange cylinder 2, achieving a quick disassembly effect, which is convenient for later maintenance and replacement.

[0053] Please see Figure 2 , Figure 9 , Figure 10 In another embodiment:

[0054] Multiple turbulence mechanisms 4 are provided inside the heat exchange cylinder 2. These mechanisms are located in multiple spiral flow channels. Each turbulence mechanism 4 includes a fixed shaft 41 and two guide plates 42. The fixed shaft 41 is installed on the inner wall of the heat exchange cylinder 2, and the two guide plates 42 are rotatably connected to the fixed shaft 41. The guide plates 42 are V-shaped and have raised edges at both ends. The turbulence mechanisms 4 are arranged in the spiral flow channels of each heat exchange cylinder. The V-shaped guide plates 42 can split and cut the spiral flow, and the raised edges at both ends guide the airflow, creating a turbulent flow disturbance effect, disrupting the stable laminar flow state, and making the disturbed airflow contact the heat source more fully, thereby further improving the heat exchange efficiency.

[0055] It is worth mentioning that the turbulence mechanism 4 also includes a rotating shaft 44, which is rotatably mounted on the inner wall of the heat exchange cylinder 2. A fan 45 is connected to the outer wall of the rotating shaft 44. When the gas flows in the spiral channel, the gas drives the rotating shaft 44 to rotate through the fan 45. Two cams 46 are connected to the outer wall of the rotating shaft 44. When the rotating shaft 44 rotates, it drives the two cams 46 to rotate. A driven frame 43 is connected to each of the two guide plates 42. The two cams 46 are located inside the two driven frames 43 respectively. There is a gap between the cams 46 and the inner side of the driven frames 43. When the cams 46 rotate, their protruding parts will alternately push the inner side of the driven frames 43, causing the driven frames 43 to swing back and forth. When the driven frame 43 reciprocates, it drives the guide plate 42 connected to it to reciprocate around the fixed shaft 41. Therefore, when the cam 46 rotates, it can drive the guide plate 42 to reciprocate through the driven frame 43. The protruding parts of the two cams 46 are in opposite directions, so that the two guide plates 42 swing in opposite directions at the same time, realizing the technical effect of the two guide plates 42 swinging alternately. The two guide plates 42 alternately disturb the airflow in different areas of the flow channel by swinging alternately, effectively eliminating the flow dead zone, continuously destroying the fluid heat exchange boundary layer, greatly improving the convective heat transfer coefficient inside the spiral flow channel, and further enhancing the overall heat exchange performance.

[0056] When using this modular heat exchange installation structure for industrial HVAC retrofitting, the two semi-split end cylinders 1 and 2 are first joined together from both sides of the chimney. The fastening mechanism 3 is then assembled using the mounting positions and fastening grooves at the joints of the end cylinders 1 and 2. The mounting block 31 of the fastening mechanism 3 is fixed within the mounting position. During the cylinder assembly process, the wedge block 32 automatically retracts into the mounting block 31 by sliding against the edge of the fastening groove using its own inclined surface. The self-locking fastening is then achieved by the spring rebound between the two wedge blocks 32. The upper and lower assembly is then completed. At this time, the positioning blocks 5 at the top of the end cylinder 1 and the heat exchange cylinder 2 are embedded and slide into the positioning grooves 6 at the bottom to complete the axial alignment and circumferential angle limit, ensuring that the spiral blades 21 inside the adjacent heat exchange cylinders 2 are accurately connected end to end. Then, the end cylinder 1 and the heat exchange cylinder 2, as well as the adjacent heat exchange cylinders 2, are locked and fixed by bolts. After the airflow is connected to the air duct 11 outside the end cylinder 1, the gas enters the heat exchange channel formed by the end cylinder 1 and multiple heat exchange cylinders 2, and is separated by the continuously arranged spiral blades 21 to form multiple through spiral channels to achieve swirling and delayed flow. The elastic fins 22 arranged in a circular array on the inner side of the heat exchange cylinder 2 adaptively conform to the outer wall of the chimney and deform to compensate for the contact gap. Relying on their high thermal conductivity, they conduct heat from the chimney to the flow channel to exchange heat with the airflow, while simultaneously buffering the thermal expansion and contraction and vibration deformation of the equipment. The airflow flowing in the spiral flow channel spontaneously drives the impeller 45 in the turbulence mechanism 4 to drive the rotating shaft 44 and cam 46 to rotate synchronously. The cam 46 alternately actuates the driven frame 43, causing the two guide plates 42 to swing back and forth in opposite directions around the fixed axis 41, thus passively turbulenting the airflow and breaking the flow. The heat exchange boundary layer is damaged to further improve heat exchange efficiency; when maintenance and disassembly are required later, the protruding internal hexagonal thread at the end of the fastening mechanism 3 drives the lead screw 34 to rotate, which drives the slide rod 35, which can only slide axially and is limited by the flat key, to move. The slide rod 35 drives the slide shaft 36 to slide in the inclined groove of the slot plate 33, thereby driving the two wedge blocks 32 to move towards each other and squeeze the spring to retract into the mounting block 31, releasing the engagement state between the fastening mechanism 3 and the fastening groove, so that the half-split end cylinder 1 or heat exchange cylinder 2 can be quickly disassembled, maintained and replaced.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A modular heat exchange installation structure for industrial HVAC retrofitting, characterized in that, It includes two end cylinders (1) and multiple heat exchange cylinders (2); Multiple heat exchange cylinders (2) are longitudinally connected and assembled between two end cylinders (1). A heat exchange channel is provided between the two end cylinders (1) and the multiple heat exchange cylinders (2). A duct (11) connected to the heat exchange channel is provided on the end cylinder (1). Both the end cylinder (1) and the heat exchange cylinder (2) are split structures that are assembled in half. The split connection between the end cylinder (1) and the heat exchange cylinder (2) is provided with a fastening mechanism (3) for fastening and fixing. Multiple spiral blades (21) are fixedly arranged inside the heat exchange cylinder (2). The multiple spiral blades (21) inside the heat exchange cylinder (2) divide the heat exchange channel into multiple spiral channels. The two ends of the multiple spiral channels converge in two end cylinders (1).

2. The modular heat exchange installation structure for industrial HVAC retrofitting according to claim 1, characterized in that: The spiral blades (21) in the two halves of the same heat exchange cylinder (2) are joined together and connected to each other, and the spiral blades (21) in the axially adjacent heat exchange cylinders (2) are connected end to end in sequence.

3. The modular heat exchange installation structure for industrial HVAC retrofitting according to claim 2, characterized in that: The heat exchange cylinder (2) has multiple fins (22) arranged in a circumferential array on its inner side, and the fins (22) have elastic deformation capability.

4. The modular heat exchange installation structure for industrial HVAC retrofitting according to claim 3, characterized in that: The top of the end cylinder (1) and the heat exchange cylinder (2) are both connected to a positioning block (5), and the bottom of the end cylinder (1) and the heat exchange cylinder (2) are both provided with a positioning groove (6). The positioning block (5) can be embedded and slid into the positioning groove (6).

5. The modular heat exchange installation structure for industrial HVAC retrofitting according to claim 4, characterized in that: The end cylinder (1) and the heat exchange cylinder (2) are respectively provided with an installation position and a fastening groove at the split connection. The fastening mechanism (3) is installed in the installation position and can be embedded in the fastening groove to achieve fastening.

6. The modular heat exchange installation structure for industrial HVAC retrofitting according to claim 5, characterized in that: The fastening mechanism (3) includes a mounting block (31) and two wedges (32). The mounting block (31) is installed in the mounting position, and the wedges (32) are slidably connected in the mounting block (31). A spring is provided between the two wedges (32). The wedges (32) are provided with inclined surfaces. During the process of embedding into the fastening groove, the wedges (32) are retracted into the mounting block (31) by sliding cooperation between their inclined surfaces and the edge of the fastening groove.

7. A modular heat exchange installation structure for industrial HVAC retrofitting according to claim 6, characterized in that: A sliding rod (35) is slidably connected inside the mounting block (31), and a lead screw (34) is threaded inside the mounting block (31). The lead screw (34) is rotatably connected to the sliding rod (35). Two sliding shafts (36) are connected to the sliding rod (35). A groove plate (33) is connected to each of the two wedges (32). An inclined groove is provided on the groove plate (33). The two sliding shafts (36) are slidably connected to the inclined grooves of the two groove plates (33). When the two sliding shafts (36) move toward the wedges (32), they can drive the two wedges (32) to retract into the mounting block (31) through the inclined groove.

8. The modular heat exchange installation structure for industrial HVAC retrofitting according to claim 7, characterized in that: The end cylinder (1) and the heat exchange cylinder (2), as well as adjacent heat exchange cylinders (2), are fixed by bolts.

9. A modular heat exchange installation structure for industrial HVAC retrofitting according to claim 2, characterized in that: The heat exchange cylinder (2) is provided with multiple turbulence mechanisms (4), and the multiple turbulence mechanisms (4) are respectively located in multiple spiral flow channels. The turbulence mechanism (4) includes a fixed shaft (41) and two guide plates (42). The fixed shaft (41) is installed on the inner wall of the heat exchange cylinder (2), and the two guide plates (42) are rotatably connected to the fixed shaft (41). The guide plates (42) are V-shaped and have raised edges at both ends.

10. A modular heat exchange installation structure for industrial HVAC retrofitting according to claim 9, characterized in that: The turbulence mechanism (4) also includes a rotating shaft (44), which is rotatably mounted on the inner wall of the heat exchange cylinder (2). A fan wheel (45) is connected to the outer wall of the rotating shaft (44). Two cams (46) are connected to the outer wall of the rotating shaft (44). A driven frame (43) is connected to each of the two guide plates (42). The two cams (46) are located inside the two driven frames (43). When the cams (46) rotate, they can drive the guide plates (42) to swing back and forth through the driven frames (43). The protrusion directions of the two cams (46) are opposite.

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