Heating device

Abstract

This application provides a heating device, including a baffle rod, a heating tube, a first liquid tank, and a connecting portion. The baffle rod is at least partially located inside the heating tube. The connecting portion includes a first connecting portion and a second connecting portion. The first connecting portion is located at one end of the baffle rod, and the inner cavity of the first liquid tank communicates with the cavity of the heating tube. The first connecting portion and the second connecting portion are engaged. In the axial direction of the baffle rod, the second connecting portion is used to restrict the movement of the baffle rod, and the second connecting portion abuts against one end of the heating tube or the inner wall of the first liquid tank. In this application, the first connecting portion is located at one end of the baffle rod, and the first connecting portion and the second connecting portion are engaged, making assembly more convenient. The second connecting portion abuts against one end of the heating tube or the inner wall of the first liquid tank, thereby fixing and limiting the baffle rod, making installation convenient.

Description

Technical Field

[0001] This application relates to the field of tubular heater technology, and more particularly to a heating device. Background Technology

[0002] Tubular heaters typically include a tube and an electric heating element mounted on the tube. Heating the tube heats the fluid flowing through it. In related technologies, to improve heating efficiency, a flow-dispersing rod with helical blades is installed inside the tube to agitate the fluid. This flow-dispersing rod has a connecting part at its end. During installation, the rod is inserted into the heating tube, and the connecting part is welded to the inner wall of the heating tube. This requires precise dimensions for the connecting part; if it is too small, it cannot be welded to the inner wall of the heating tube; if it is too large, it cannot be inserted into the heating tube for welding, making assembly cumbersome. Summary of the Invention

[0003] This application provides a heating device that is simple and convenient to assemble.

[0004] This application provides a heating device, including a baffle rod, a heating tube, a first liquid tank, and a connecting part. The baffle rod is at least partially located inside the heating tube. The connecting part includes a first connecting part and a second connecting part. The first connecting part is located at one end of the baffle rod, and the inner cavity of the first liquid tank is in communication with the cavity of the heating tube.

[0005] The first connecting part and the second connecting part are engaged. In the axial direction of the baffle rod, the second connecting part is used to restrict the movement of the baffle rod. The second connecting part abuts against one end of the heating tube or the inner wall of the first liquid tank.

[0006] In this application, the first connecting part is located at one end of the baffle rod, and the first connecting part is engaged with the second connecting part, which makes assembly more convenient. The second connecting part abuts against one end of the heating tube or the inner wall of the first liquid tank, thereby fixing and limiting the baffle rod, which is convenient for installation.

[0007] This application also provides a heating device, including a baffle rod, a heating tube, a first liquid tank, and a connecting part, wherein the baffle rod is at least partially located inside the heating tube; the connecting part includes a first connecting part located at one end of the baffle rod, and the inner cavity of the first liquid tank communicates with the cavity of the heating tube;

[0008] The first connecting part is engaged with the inner wall of the first liquid tank or one end of the heating tube.

[0009] In this application, the first connecting part is located at one end of the turbulence rod. The first connecting part is engaged with the inner wall of the first liquid tank or one end of the heating tube, thereby fixing and limiting the turbulence rod, making assembly simple and convenient. Attached Figure Description

[0010] Figure 1 A perspective view of the heating device in this invention;

[0011] Figure 2 This is an exploded view of one embodiment of the heating device in this invention;

[0012] Figure 3 This is a perspective sectional view of one embodiment of the heating device in this invention;

[0013] Figure 4 This is a perspective sectional view of another embodiment of the heating device in this invention;

[0014] Figure 5 This is an exploded view of another embodiment of the heating device in this invention;

[0015] Figure 6 This is a perspective sectional view of another embodiment of the heating device in this invention;

[0016] Figure 7 This is a perspective sectional view of another embodiment of the heating device in this invention from another angle;

[0017] Figure 8 This is a perspective view of one embodiment of the spoiler rod in this invention;

[0018] Figure 9 This is a perspective view of another embodiment of the spoiler rod in this invention;

[0019] Figure 10 This is a perspective view of the second connecting part in this invention;

[0020] Figure 11 This is a perspective view of the second connecting part in this invention from another angle. Detailed Implementation

[0021] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] The present invention provides a heating device in one embodiment, such as... Figure 1 , Figures 5 to 7 and Figures 9 to 11 As shown, its specific structure includes a baffle rod 1, a heating tube 2, a first liquid tank 3, and a connecting part. The baffle rod 1 is at least partially located inside the heating tube 2. The connecting part includes a first connecting part 4 and a second connecting part 5. The first connecting part 4 is located at one end of the baffle rod 1. The inner cavity of the first liquid tank 3 is connected to the cavity of the heating tube 2. The first connecting part 4 and the second connecting part 5 are engaged. In the axial direction of the baffle rod 1, the second connecting part 5 is used to restrict the movement of the baffle rod 1. The second connecting part 5 abuts against one end of the heating tube 2 or the inner wall of the first liquid tank 3.

[0024] In related technologies, a thin film heating layer is provided on the outer circumference of the heating tube 2. The thin film heating layer is sandwiched between two insulating layers. At the same time, the thin film heating layer can be connected to an external power source, so that the thin film heating layer can heat the heating tube 2 and then heat the fluid flowing through the cavity of the heating tube 2 through heat conduction.

[0025] Since the thin-film heating layer heats the wall of the heating tube 2, the closer the fluid is to the inner wall of the heating tube 2, the better the heating effect. To improve the heating effect, a baffle rod 1 can be installed in the heating tube 2. On the one hand, the baffle rod 1 makes the fluid closer to the inner wall of the tube cavity under the structural action of the baffle rod 1. When the baffle rod 1 is installed in the heating tube 2, it is located on the axis of the heating tube 2, that is, the center line of the heating tube 2. Therefore, the fluid cannot pass through the center position due to the obstruction of the baffle rod 1 structure. The fluid can only flow around the baffle rod 1, making the fluid closer to the tube wall. On the other hand, the heat exchange efficiency between the fluid and the wall of the heating tube 2 is improved under the disturbance of the baffle rod 1, which further improves the heating effect.

[0026] However, in related technologies, when the baffle rod 1 is installed inside the heating tube 2, both ends of the baffle rod 1 need to be welded to the inner wall of the heating tube 2. In this invention, the heating tube 2 is welded to the first liquid tank 3. When the baffle rod 1 is installed, the first connecting part 4 at one end of the baffle rod 1 engages with the second connecting part 5, and then the second connecting part 5 engages with the inner wall of the first liquid tank 3 or one end of the heating tube 2, thereby fixing the baffle rod 1. The inner cavity of the first liquid tank 3 is connected to the cavity of the heating tube 2, and the first liquid tank 3 is also a sealed box. During the operation of the heating device, the fluid first enters the inner cavity of the first liquid tank 3 and then flows into the cavity of the heating tube 2. Therefore, when installing the baffle rod 1, there is no need to consider the sealing between the two ends of the baffle rod 1 and the heating tube 2, which greatly improves the convenience of assembly.

[0027] Among them, such as Figures 8 to 9As shown, the first connecting portion 4 includes multiple snap-fit ​​portions 401 and multiple extension portions 402. The snap-fit ​​portions 401 are elastic members. The multiple snap-fit ​​portions 401 are arranged at intervals along the circumferential direction of the heating tube 2. In the radial direction of the heating tube 2, the extension portions 402 extend outward from the end of the snap-fit ​​portion 401 away from the baffle rod 1; as shown Figures 10 to 11 As shown, the second connecting part 5 includes a retaining ring 501, a limiting ring 502, and a connecting rib 503. The maximum diameter of the retaining ring 501 is smaller than the diameter of the heating tube 2, and the maximum diameter of the limiting ring 502 is larger than the diameter of the heating tube 2. The retaining ring 501 is at least partially located inside the limiting ring 502, and the connecting rib 503 connects the retaining ring 501 and the limiting ring 502. The maximum distance between the extensions 402 is smaller than the diameter of the heating tube 2. The engaging part 401 is at least partially located inside the retaining ring 501, and the engaging part 401 abuts against the inner wall of the retaining ring 501. The retaining ring 501 includes a first sidewall 505, and the extension 402 abuts against the first sidewall 505. In the axial direction of the heating tube 2, the first sidewall 505 restricts the movement of the extension 402.

[0028] When assembling the heating device, the heating tube 2 is first connected to the first liquid tank 3. The first liquid tank 3 is a box structure formed by welding multiple metal plates. The heating tube 2 is connected to one side wall of the first liquid tank 3, and the heating tube 2 is welded to the metal plate of this side wall. Before assembling the baffle rod 1, the metal plate on the side opposite to the heating tube 2 is not welded, leaving an empty notch so that the baffle rod 1 can be installed into the heating tube 2 through the empty notch. After the baffle rod 1 is installed, the metal plate at the empty notch position is welded on to keep the first liquid tank 3 sealed.

[0029] like Figures 5 to 7 As shown, when the first connecting part 4 and the second connecting part 5 are snapped together, the snapping part 401 abuts against the inner wall of the retaining ring 501, and the extension part 402 abuts against one side wall of the retaining ring 501.

[0030] In this embodiment, two situations may occur. In the first situation, when the second connecting part 5 abuts against one end of the heating tube 2, the opening of one end of the heating tube 2 is located in the inner cavity of the first liquid tank 3, the second connecting part 5 is at least partially located in the inner cavity of the first liquid tank 3, and the limiting ring 502 or the connecting rib 503 at least partially abuts against one end of the heating tube 2.

[0031] When connecting the heating tube 2 to the first liquid tank 3, a hole adapted to the heating tube 2 is made on the side wall of the first liquid tank 3 to facilitate the connection. When one end of the heating tube 2 extends into the inner cavity of the first liquid tank 3 during the connection process, the second connecting part 5 directly abuts against one end of the heating tube 2, thus fixing the turbulence rod 1. If the limiting ring 502 is large, the connecting rib 503 plays the main abutting role, abutting against the opening of the heating tube 2. If the limiting ring 502 is roughly the same size as the diameter of the heating tube 2, or if the limiting ring 502 is slightly larger than the diameter of the heating tube 2, the limiting ring 502 plays the main abutting role, abutting against the opening of the heating tube 2. This achieves the fixed positioning of the turbulence rod 1.

[0032] In the second case, when the second connecting part 5 abuts against the inner wall of the first liquid tank 3, one end of the heating tube 2 is located on the inner wall of the first liquid tank 3, the second connecting part 5 is at least partially located in the inner cavity of the first liquid tank 3, and the limiting ring 502 is at least partially abutting against the inner wall of the first liquid tank 3.

[0033] In this case, when the heating tube 2 is connected to the side wall of the first liquid tank 3, the opening of the heating tube 2 does not extend into the inner cavity of the first liquid tank 3, but is located on the inner wall of the hole opened in the first liquid tank 3. At this time, after the heating tube 2 and the first liquid tank 3 are welded, the first connecting part 4 and the second connecting part 5 are engaged. The second connecting part 5 will then engage with the inner wall of the first liquid tank 3. In the engaged state, the limiting ring 502 abuts against the inner wall of the first liquid tank 3.

[0034] The maximum distance between the extensions 402 is less than the diameter of the heating tube 2. At this time, the baffle rod 1 can be inserted into the heating tube 2 more conveniently and smoothly. Similarly, when installing the baffle rod 1, the baffle rod 1 is inserted into the first liquid tank 3, and then the baffle rod 1 is inserted into the heating tube 2. When the first connecting part 4 extends from one end of the heating tube 2 and extends from the other end, the second connecting part 5 is then snapped together with the first connecting part 4.

[0035] During engagement, the retaining ring 501 is aligned with the extension 402, and a certain force is applied, causing the extension 402 and the retaining part 401 to be squeezed into the retaining ring 501. Since the retaining part 401 is an elastic element, when an external force is applied to fit the retaining ring 501 onto the retaining part 401, the extension 402 will move closer together under the compression of the retaining ring 501, and the retaining part 401 will also move closer together. As a result, the retaining part 401 generates elastic force. When the extension 402 passes through the retaining ring 501, under the action of elastic force, the retaining part 401 returns to its original shape, so that the retaining part 401 abuts against the inner wall of the retaining ring 501, and the extension 402 also abuts against the first side wall 505. Since the extension 402 extends outward from the retaining part 401, when the extension 402 abuts against the first side wall 505, it can restrict the movement of the entire spoiler rod 1 in its own axial direction, thereby playing the role of fixing the spoiler rod 1.

[0036] Since the diameter of the retaining ring 501 is smaller than the diameter of the heating tube 2, if the retaining ring 502 is not used to fix the retaining ring 501, the turbulence rod 1 will still move in the axial direction of the heating tube 2 even after it is engaged with the retaining ring 501. The retaining ring 502 abuts against the inner wall of the first liquid tank 3 or against the opening of the heating tube 2 for limitation, and the retaining ring 501 connected to it is also limited. At this time, when the retaining ring 501 is engaged with the first connecting part 4, the movement of the turbulence rod 1 will be limited, thus achieving relative fixation between the turbulence rod 1 and the heating tube 2.

[0037] The maximum diameter of the retaining ring 501 is smaller than the diameter of the heating tube 2, while the diameter of the limiting ring 502 is larger than the diameter of the heating tube 2. This is because the maximum diameter between the extensions 402 is smaller than the diameter of the heating tube 2, facilitating the engagement of the retaining ring 501 with the first connecting part 4. Furthermore, the smaller diameter of the retaining ring 501 allows it to restrict the movement of the turbulence-inducing rod 1 in its axial direction when engaged with the limiting ring 502. When the retaining ring 501 is connected to the limiting ring 502 via the connecting rib 503, its maximum diameter is still smaller than the diameter of the heating tube 2, creating a larger gap between them for fluid passage. If the diameter of the retaining ring 501 is larger than the diameter of the heating tube 2, it will obstruct the cavity of the heating tube 2 when engaged with the first connecting part 4, affecting fluid flow.

[0038] The extension 402 has a rounded chamfer 403 on the side away from the first sidewall 505, and the retaining ring 501 includes a second sidewall 506, which has a rounded surface 507.

[0039] To facilitate the easy insertion of the retaining ring 501 into the retaining part 401 and its abutment, a rounded chamfer 403 is provided on one side of the extension 402. The rounded chamfer 403 makes it easier for the extension 402 to be squeezed into the retaining ring 501, making it easier for the extension 402 to change position, thereby causing the retaining part 401 to move as well. When the extension 402 is squeezed into the retaining ring 501, the extensions 402 move closer together, and the retaining parts 401 also move closer together and generate elasticity. When external force is continued to be applied to the retaining ring 501, the retaining ring 501 continues to squeeze the extension 402 until the extension 402 passes through the retaining ring 501. At this time, the retaining part 401 returns to its original shape under the action of elasticity, so that the retaining part 401 can abut against the inner wall of the retaining ring 501.

[0040] The arc surface 507 can work with the arc chamfer 403 to make it easier for the extension 402 to be squeezed into the retaining ring 501. On the other hand, the arc surface 507 also makes it easier to position during assembly, making it easier for the assembly personnel to align the retaining ring 501 with the extension 402 and improve the efficiency of snap-fit ​​assembly.

[0041] In addition, the second connecting part 5 includes a plurality of limiting pieces 504, which are connected to the limiting ring 502. In the axial direction of the turbulence rod 1, the limiting pieces 504 extend from the limiting ring 502 toward the heating tube 2 and abut against the inner wall of the heating tube 2.

[0042] The limiting piece 504 serves two purposes: firstly, it facilitates the positioning of the baffle rod 1 when it is installed into the heating tube 2, ensuring that the baffle rod 1 is always at the center line of the heating tube 2; secondly, it supports and limits the second connecting part 5, preventing the baffle rod 1 from moving in the radial direction of the heating tube 2.

[0043] In this embodiment, the heating device includes a third connecting part 6 and a second liquid tank 7. The third connecting part 6 is at least partially located in the inner cavity of the second liquid tank 7. The third connecting part 6 is located at the end of the baffle rod 1 away from the second connecting part 5. The third connecting part 6 and one end of the baffle rod 1 are integral parts or snap-fitted together.

[0044] The structure of the third connecting part 6 is the same as that of the second connecting part 5. When the third connecting part 6 is engaged with the other end of the spoiler rod 1, the other end of the spoiler rod 1 is also provided with the first connecting part 4. The engagement method between the first connecting part 4 and the third connecting part 6 is the same as the engagement method between the first connecting part 4 and the second connecting part 5.

[0045] Similarly, the other end of the baffle rod 1 is provided with a second liquid tank 7, which is also sealed by metal plate welding. The other end of the heating tube 2 is welded to the second liquid tank 7, and the tube cavity of the heating tube 2 is connected to the inner cavity of the second liquid tank 7. During the operation of the heating device, the fluid enters from the first liquid tank 3, flows through the heating tube 2, then flows from the heating tube 2 into the second liquid tank 7, and then is introduced to the outside from the second liquid tank 7. The baffle rod 1 turbulents the fluid to improve the heating effect.

[0046] In addition, when installing the baffle rod 1, if the other end of the baffle rod 1 is an integral part of the third connecting part 6, then during assembly, the baffle rod 1 is inserted into the heating tube 2, and one end of the baffle rod 1 is fixed by the snap-fit ​​of the first connecting part 4 and the second connecting part 5. If the other end of the baffle rod 1 is snap-fitted to the third connecting part 6, then the baffle rod 1 is first inserted into the heating tube 2, and then the second connecting part 5 and the third connecting part 6 are snapped onto the first connecting parts 4 at both ends of the baffle rod 1, either sequentially or simultaneously. After snapping, the second connecting part 5 abuts against one end of the heating tube 2 or the inner wall of the first liquid tank 3; the third connecting part 6 abuts against the other end of the heating tube 2 or the inner wall of the second liquid tank 7.

[0047] In another embodiment, the heating device, such as Figures 1 to 4 , Figure 8 and Figures 10 to 11 As shown, its structure includes a baffle rod 1, a heating tube 2, a first liquid tank 3, and a connecting part. The baffle rod 1 is at least partially located inside the heating tube 2. The connecting part includes a first connecting part 4, which is located at one end of the baffle rod 1. The inner cavity of the first liquid tank 3 is connected to the cavity of the heating tube 2. The first connecting part 4 is engaged with the inner wall of the first liquid tank 3 or one end of the heating tube 2.

[0048] In this embodiment, the first connecting part 4 includes a plurality of snap-fit ​​parts 401 and a plurality of extension parts 402. The snap-fit ​​parts 401 are elastic members. The plurality of snap-fit ​​parts 401 are arranged at intervals along the circumferential direction of the heating tube 2. In the radial direction of the heating tube 2, the extension parts 402 extend outward from the end of the snap-fit ​​parts 401 away from the baffle rod 1. The maximum distance between the extension parts 402 is greater than the diameter of the heating tube 2.

[0049] The maximum distance between the extensions 402 is greater than the diameter of the heating tube 2, so that when the first connecting part 4 extends into the heating tube 2 from one end and extends out from the other end, the first connecting part 4 can achieve the fixed positioning of the turbulence rod 1 by the limiting of the extension 402.

[0050] Although the maximum distance between the extensions 402 is greater than the diameter of the heating tube 2, the snap-fit ​​part 401 is an elastic element that can deform. When the first connecting part 4 is inserted from one end of the heating tube 2, the extensions 402 move closer to each other under the restriction of the tube wall of the heating tube 2, so that the first connecting part 4 can move inside the heating tube 2. At this time, the snap-fit ​​part 401 deforms and generates elastic force. When the extension 402 extends from the other end of the heating tube 2, under the action of elastic force, both the extension 402 and the snap-fit ​​part 401 return to their initial state, so that the extension 402 can limit the turbulence rod.

[0051] This embodiment also has two cases. In the first case, the first connecting part 4 at one end of the turbulence rod 1 is engaged with the inner wall of the first liquid tank 3, one end of the heating tube 2 is located on the side wall of the first liquid tank 3, the extension part 402 is at least partially in contact with the inner wall of the first liquid tank 3, and the engaging part 401 is at least partially located inside the heating tube 2.

[0052] When connecting the first liquid tank 3 and the heating tube 2, the two embodiments in this application adopt the same method, opening a hole on one side of the first liquid tank 3, and the heating tube 2 is located on the inner wall of the hole during the welding process. Thus, when the extension 402 extends from the other end of the heating tube 2, the extension 402, which returns to its initial state, abuts against the inner wall of the first liquid tank 3, thereby limiting the movement of the turbulence rod 1.

[0053] In the second case, the first connecting part 4 at one end of the turbulence rod 1 is engaged with one end of the heating tube 2, the opening of one end of the heating tube 2 is located in the inner cavity of the first liquid tank 3, the extension part 402 at least partially abuts against one end of the heating tube 2, and the engaging part 401 at least partially is located inside the heating tube 2.

[0054] In this case, when one end of the heating tube 2 is connected to the first liquid tank 3, the opening of one end of the heating tube 2 extends into the inner cavity of the first liquid tank 3. Thus, when the extension 402 extends out from the other end of the heating tube 2, the extension 402, which returns to its initial state, will abut against the opening of the heating tube 2, thereby limiting the movement of the turbulence rod 1.

[0055] Similarly, in this embodiment, the heating device includes a third connecting part 6, which is located at the end of the baffle rod 1 away from the first connecting part 4. The end of the baffle rod 1 and the third connecting part 6 are integral or snap-fitted together. The heating device includes a second liquid tank 7, and the third connecting part 6 is at least partially located in the inner cavity of the second liquid tank 7. This embodiment is the same as the embodiment described above, and will not be repeated here.

[0056] Among them, such as Figures 8 to 9 As shown, in both embodiments, the structure of the spoiler rod 1 includes a rod body 101 and a helical blade 102, and the rod body 101 and the helical blade 102 are integral parts.

[0057] When the baffle rod 1 is assembled into the heating tube 2, the rod body 101 is located at the center line of the heating tube 2. This position is the farthest from the tube wall of the heating tube 2. If the fluid passes through this position, the heating efficiency of the fluid at the center line position is the worst compared to passing through the tube wall position. Therefore, the rod body 101 being located at the center line position can restrict and hinder the fluid from passing through this position. Furthermore, the rod body 101, in conjunction with the spiral blade 102, makes the fluid flow as close as possible to the tube wall of the heating tube 2, thereby improving the heating efficiency.

[0058] The first liquid tank 3 and the second liquid tank 7 both have through holes 8. The first liquid tank 3 is sealed to one end of the heating tube 2, and the second liquid tank 7 is sealed to the other end of the heating tube 2.

[0059] When the fluid enters the first liquid tank 3 or flows out of the second liquid tank 7, it does so through the through hole 8. The first liquid tank 3 or the second liquid tank 7 can also be connected to a pipe at the location of the through hole 8, so as to facilitate connection with external structures and facilitate the introduction and export of fluid.

[0060] The above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. The understanding of this specification should be based on those skilled in the art. For example, directional descriptions such as "front", "back", "left", "right", "up", and "down" are only used to describe the relationship between objects and are not substantial limitations. "Multiple" means at least two or more.

[0061] Although this specification has described the present application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present application, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A heating device, characterized in that, It includes a baffle rod (1), a heating tube (2), a first liquid tank (3) and a connecting part. The baffle rod (1) is at least partially located inside the heating tube (2). The connecting part includes a first connecting part (4) and a second connecting part (5). The first connecting part (4) is located at one end of the baffle rod (1). The inner cavity of the first liquid tank (3) is connected to the cavity of the heating tube (2). The first connecting part (4) is engaged with the second connecting part (5). In the axial direction of the turbulence rod (1), the second connecting part (5) is used to restrict the movement of the turbulence rod (1). The second connecting part (5) abuts against one end of the heating tube (2) or the inner wall of the first liquid tank (3). The second connecting part (5) includes a retaining ring (501) and a limiting ring (502), with a gap between the retaining ring and the limiting ring.

2. The heating device according to claim 1, characterized in that, The first connecting part (4) includes multiple snap-fit ​​parts (401) and multiple extension parts (402). The snap-fit ​​parts (401) are elastic members. The multiple snap-fit ​​parts (401) are arranged at intervals along the circumferential direction of the heating tube (2). In the radial direction of the heating tube (2), the extension parts (402) extend outward from the end of the snap-fit ​​part (401) away from the baffle rod (1). The second connecting part (5) includes a connecting rib (503), the maximum diameter of the retaining ring (501) is smaller than the diameter of the heating tube (2), the maximum diameter of the limiting ring (502) is larger than the diameter of the heating tube (2), the retaining ring (501) is at least partially located inside the limiting ring (502), and the connecting rib (503) is connected between the retaining ring (501) and the limiting ring (502); The maximum spacing between the extensions (402) is less than the diameter of the heating tube (2); the snap-fit ​​portion (401) is at least partially located inside the retaining ring (501), and the snap-fit ​​portion (401) abuts against the inner wall of the retaining ring (501); the retaining ring (501) includes a first sidewall (505), and the extension (402) abuts against the first sidewall (505), and in the axial direction of the heating tube (2), the first sidewall (505) restricts the movement of the extension (402).

3. The heating device according to claim 2, characterized in that, When the second connecting part (5) abuts against one end of the heating tube (2), one end of the heating tube (2) is located in the inner cavity of the first liquid tank (3), the second connecting part (5) is at least partially located in the inner cavity of the first liquid tank (3), and the limiting ring (502) or the connecting rib (503) at least partially abuts against one end of the heating tube (2). When the second connecting part (5) abuts against the inner wall of the first liquid tank (3), one end of the heating tube (2) is located on the inner wall of the first liquid tank (3), the second connecting part (5) is at least partially located in the inner cavity of the first liquid tank (3), and the limiting ring (502) abuts against the inner wall of the first liquid tank (3) at least partially.

4. The heating device according to claim 2, characterized in that, The extension (402) has a rounded chamfer (403) on the side away from the first sidewall (505), and the retaining ring (501) includes a second sidewall (506) having a rounded surface (507).

5. The heating device according to claim 2, characterized in that, The second connecting part (5) includes a plurality of limiting pieces (504), which are connected to the limiting ring (502). In the axial direction of the turbulence rod (1), the limiting piece (504) extends from the limiting ring (502) toward the heating tube (2) and the limiting piece (504) abuts against the inner wall of the heating tube (2).

6. The heating device according to claim 3, characterized in that, The heating device includes a third connecting part (6) and a second liquid tank (7). The third connecting part (6) is at least partially located in the inner cavity of the second liquid tank (7). The third connecting part (6) is located at the end of the baffle rod (1) away from the second connecting part (5). The third connecting part (6) and one end of the baffle rod (1) are integral parts or snap-fitted together.

7. A heating device, characterized in that, It includes a baffle rod (1), a heating tube (2), a first liquid tank (3) and a connecting part. The baffle rod (1) is at least partially located inside the heating tube (2). The connecting part includes a first connecting part (4), which is located at one end of the baffle rod (1). The inner cavity of the first liquid tank (3) is connected to the cavity of the heating tube (2). The first connecting part (4) is engaged with the inner wall of the first liquid tank (3) or one end of the heating tube (2); The first connecting part (4) includes multiple snap-fit ​​parts (401) and multiple extension parts (402). The snap-fit ​​parts (401) are elastic members. The multiple snap-fit ​​parts (401) are arranged at intervals along the circumferential direction of the heating tube (2). In the radial direction of the heating tube (2), the extension parts (402) extend outward from the end of the snap-fit ​​parts (401) away from the baffle rod (1). The maximum distance between the extension parts (402) is greater than the diameter of the heating tube (2).

8. The heating device according to claim 7, characterized in that, When the first connecting part (4) at one end of the turbulence rod (1) is engaged with the inner wall of the first liquid tank (3), one end of the heating tube (2) is located on the side wall of the first liquid tank (3), the extension part (402) is at least partially in contact with the inner wall of the first liquid tank (3), and the engaging part (401) is at least partially located inside the heating tube (2). When the first connecting part (4) at one end of the turbulence rod (1) is engaged with one end of the heating tube (2), the opening of one end of the heating tube (2) is located in the inner cavity of the first liquid tank (3), the extension part (402) at least partially abuts against one end of the heating tube (2), and the engaging part (401) at least partially is located inside the heating tube (2).

9. The heating device according to claim 8, characterized in that, The heating device includes a third connecting part (6), which is located at the end of the baffle rod (1) away from the first connecting part (4). The end of the baffle rod (1) and the third connecting part (6) are integral or snap-fitted together. The heating device includes a second liquid tank (7), and the third connecting part (6) is at least partially located in the inner cavity of the second liquid tank (7).

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