A rod-shaped heating portion, a heating device, and a drying apparatus

Abstract

The present application relates to the field of heating equipment, disclose a kind of rod-shaped heating part, heating device and drying equipment, including rod-shaped body, multiple fluid passages are arranged in the rod-shaped body along the axial direction;At least one fluid passage forms a flow channel and at least one fluid passage forms a return flow passage;In one of the rod-shaped body, fluid can flow into the flow channel from one end of the rod-shaped body, and flow in the first direction;Same fluid can flow into the return flow passage at the other end of the rod-shaped body, and flow out from the return flow passage in the opposite direction of the first direction.The rod-shaped heating part, heating device and drying equipment of the present application optimize the internal flow passage structure of rod-shaped heating part, and can effectively improve the temperature uniformity of the drying rod.

Description

Technical Field

[0001] This invention relates to the field of heating equipment, and more particularly to a rod-shaped heating element, a heating device, and a drying device. Background Technology

[0002] An electric towel rack is a device used to hang towels to dry, which can effectively improve the drying efficiency of towels and prevent them from getting moldy.

[0003] Electric towel racks on the market typically consist of a drying rod and a control device. The drying rod has a hollow, single-hole structure, allowing fluid to flow along its inner hole to heat towels, clothes, and other items hung on it. However, in this type of electric towel rack, the fluid can only flow from one end of the drying rod to the other. This results in a significant temperature difference along the length of the drying rod, with lower temperatures at the far end. This affects the evenness of drying towels and other items, greatly impacting the user experience.

[0004] Therefore, it is necessary to design a rod-shaped heating element, a heating device, and a drying equipment, and optimize the internal flow channel structure of the rod-shaped heating element to effectively improve the temperature uniformity of the drying rod.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Summary of the Invention

[0006] This invention provides a rod-shaped heating element, a heating device, and a drying equipment. The optimized internal flow channel structure of the rod-shaped heating element can effectively improve the temperature uniformity of the drying rod.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A rod-shaped heating element includes a rod-shaped body, wherein the rod-shaped body has multiple fluid channels arranged axially inside; At least one fluid channel forms a flow delivery channel and at least one fluid channel forms a return flow channel; In one of the rod-shaped bodies, fluid can flow into the flow channel from one end of the rod-shaped body and flow in a first direction; the same stream of fluid can flow into the return channel from the other end of the rod-shaped body and flow out from the return channel in the opposite direction to the first direction.

[0008] Optionally, the rod-shaped body includes a hollow rod and a partition structure, the partition structure separating the flow channel and the return channel; The supply channel and return channel are symmetrically arranged with respect to the separation structure.

[0009] Optionally, the partition structure includes a partition plate, the flow channel and the return channel are located on opposite sides of the partition plate, and a heat transfer enhancement part is provided protruding on at least one side of the partition plate.

[0010] Optionally, the two opposite sides of the partition plate are provided with heat transfer enhancement structures.

[0011] Optionally, the heat transfer enhancement structure includes a plurality of strip-shaped protrusions, which are parallel to the centerline of the rod-shaped body.

[0012] Optionally, the cross-section of the partition structure is grid-shaped along the axial direction perpendicular to the rod-shaped body.

[0013] Optionally, all the fluid channels are arranged in a circumferential array around the centerline of the rod-shaped body.

[0014] Optionally, the supply channel and / or the return channel have an asymmetrical structure.

[0015] Optionally, the rod-shaped body further includes a reserved functional cavity, which is not connected to the flow delivery channel and not connected to the return flow channel.

[0016] Optionally, in the rod-shaped body, one of the flow channels is connected to only one return channel.

[0017] Optionally, in the rod-shaped body, one of the flow channels connects to at least two of the return channels.

[0018] Optionally, the tail end of the rod-shaped body forms a return structure, and the return structure forms a reversing communication hole connecting the other end of the flow channel and the other end of the return channel.

[0019] Optionally, the rod-shaped heating part further includes an end reversing member, the end reversing member forming an insertion hole for insertion into the tail end of the rod-shaped body, the insertion hole forming a reversing communication cavity; The reversing communication cavity connects the other end of the flow delivery channel and the other end of the return flow channel.

[0020] Optionally, the end reversing member forms a plurality of mutually separated reversing communication cavities; Different reversing communication cavities are used to connect different flow supply channels and return channels.

[0021] Optionally, the insertion hole includes a first columnar hole segment and a second columnar hole segment; The first columnar hole segment matches the outer peripheral shape of the rod-shaped body, and a positioning step is formed between the second columnar hole segment and the first columnar hole segment to position and stop the end of the rod-shaped body.

[0022] A heating device includes a rod-shaped heating element as described in any of the preceding claims.

[0023] Optionally, the heating device also includes a housing; The housing is provided with a separate supply cavity and a return cavity, the supply cavity is provided with a first docking part, and the return cavity is provided with a second docking part; When the rod-shaped body is inserted into the housing in a set direction, the first pair of interfaces are sealed and connected to the first docking part, so that the supply cavity is connected to the flow channel to form a supply fluid passage; the second pair of interfaces are sealed and connected to the second docking part, so that the return channel is connected to the return cavity to form a return fluid passage, and the supply fluid passage and the return fluid passage are separated from each other.

[0024] Optionally, the housing is provided with a plug-in hole; Both the first docking portion and the second docking portion are located in the insertion hole.

[0025] Optionally, the heating device also includes a seal; The seal is installed in the insertion hole, and the seal has a first through hole and a second through hole, as well as an intermediate partition separating the first through hole and the second through hole; The first through hole connects the first pair of interfaces and the first docking part, and the second through hole connects the second pair of interfaces and the second docking part.

[0026] Optionally, the heating device may also include a positioning anti-rotation structure; The positioning and anti-rotation structure restricts the rod-shaped body inserted into the insertion hole from rotating around the center line of the insertion hole.

[0027] Optionally, the positioning and anti-rotation structure is a snap-fit ​​structure, a slotted key structure, or an anti-rotation pin structure.

[0028] Optionally, the heating device may further include a fluid heating component and a fluid circulation drive device; The fluid heating assembly is used to heat the fluid flowing from the return cavity to the supply cavity, and the fluid circulation driving device drives the fluid to circulate along the supply cavity, the delivery channel, the return channel and the return cavity.

[0029] A drying apparatus comprising a heating device as described in any of the preceding claims.

[0030] Compared with the prior art, the present invention has the following beneficial effects: The rod-shaped heating element, heating device, and drying equipment provided by this invention ingeniously optimize the structure of the rod-shaped heating element. The rod-shaped body of the heating element has an axially arranged flow channel and a return channel, allowing the same fluid to flow back and forth along the heating element. The heating element is heated by the fluid to achieve the effect of drying towels and other items. In this embodiment, the fluid flows into the flow channel and along a first direction, and the same fluid can flow into the return channel at the other end of the heating element and flow out from the return channel in the opposite direction of the first direction. This avoids the situation where the temperature at one end of the existing rod-shaped heating element is significantly higher than that at the other end, effectively improving the temperature uniformity of the heating element and enhancing the uniform drying effect of the items to be dried.

[0031] The present invention has other features and advantages, which will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of the invention. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is a perspective view of the first heating device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A three-dimensional structural diagram of the heating device; Figure 3 yes Figure 1 A three-dimensional structural diagram of the heating device from another viewpoint; Figure 4 This is a side view schematic diagram of the end reversing component provided in an embodiment of the present invention; Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure of the end reversing component along line AA; Figure 6 This is a cross-sectional structural diagram of a rod-shaped heating section with a reflux structure provided in an embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of a rod-shaped heating section provided in an embodiment of the present invention, which has two flow channels and two return channels; Figure 8 This is a schematic cross-sectional view of a rod-shaped heating section with a reserved functional cavity provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of another rod-shaped heating part provided in an embodiment of the present invention; Figure 10 This is a three-dimensional structural schematic diagram of the second heating device provided in an embodiment of the present invention; Figure 11 yes Figure 10 A front view of the heating device; Figure 12 yes Figure 10 A schematic diagram of the cross-sectional structure of the heating device along line BB; Figure 13 yes Figure 12 An enlarged schematic diagram of the heating device at position A; Figure 14 yes Figure 12 An enlarged schematic diagram of the heating device at position B; Figure 15 yes Figure 10 Explosion diagram of the heating device; Figure 16 yes Figure 15 An enlarged view of position C in the middle; Figure 17 This is a three-dimensional structural diagram of a sealing element provided in an embodiment of the present invention.

[0034] Reference numerals: 1. Rod-shaped body; 101. Flow channel; 102. Return channel; 103. Reserved functional cavity; 11. Hollow rod body; 12. Separation structure; 121. Heat transfer enhancement part; 14. Return structure; 141. Reversing communication hole; 2. End reversing component; 21. Insertion hole; 211. First columnar hole segment; 212. Second columnar hole segment; 213. Positioning step; 201. Reversing communication cavity; 3. Shell; 301. Flow supply cavity; 302. Return cavity; 303. Insertion hole; 31. First docking part; 32. Second docking part; 4. Sealing element; 401. First through hole; 402. Second through hole; 403. Intermediate separation part; 51. Snap-fit ​​structure; 511. Snap-fit ​​groove; 512. Snap-fit ​​protrusion; 6. Fluid circulation drive device. Detailed Implementation

[0035] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0036] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0039] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0040] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0041] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0042] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] Unless otherwise expressly specified or limited, the terms "installation," "connection," "attachment," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] Example 1 In view of the aforementioned defects in existing heating rods, the applicant, based on its many years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, has actively conducted research and innovation in order to create a solution that can overcome the defects in the existing technology and make the rod-shaped heating element more practical.

[0045] Please refer to Figures 1 to 9 , or refer to Figures 10 to 17 The present invention discloses a rod-shaped heating part, including a rod-shaped body 1, and a plurality of fluid channels are provided inside the rod-shaped body 1 along the axial direction; at least one fluid channel forms a flow channel 101 and at least one fluid channel forms a return channel 102.

[0046] In a rod-shaped body 1, fluid can flow into the flow channel 101 from one end of the rod-shaped body 1 and flow in the first direction; the same fluid can flow into the return channel 102 from the other end of the rod-shaped body 1 and flow out from the return channel 102 in the opposite direction of the first direction.

[0047] The rod-shaped heating element in this embodiment features a cleverly optimized structure. The rod-shaped body 1 of the heating element has an axially oriented flow channel 101 and a return channel 102. The same fluid can flow back and forth along the heating element, heating it to dry items such as towels. In this embodiment, the fluid flows into the flow channel 101 and along a first direction, while the same fluid can flow into the return channel 102 at the other end of the heating element and exit from the return channel 102 in the opposite direction of the first direction. This avoids the situation where one end of the existing rod-shaped heating element has a significantly higher temperature than the other, effectively improving the temperature uniformity of the heating element and enhancing the uniform drying effect on the items to be dried. It should also be noted that the fluid can be a gas or a liquid.

[0048] It should be further explained that when the fluid flows along the delivery channel 101, the temperature is transferred to the outer periphery of the rod-shaped body 1 to dry the object, and the fluid temperature gradually decreases; however, when the fluid flows in the return channel 102, the fluid temperature gradually decreases along the flow direction; but the flow direction of the fluid in the delivery channel 101 is opposite to that in the return channel 102, so the fluid with the highest temperature in the delivery channel 101 can transfer heat to the fluid with the lowest temperature in the return channel 102, thereby uniformizing the temperature and making the temperature of the outer periphery of the rod-shaped heating part more uniform.

[0049] Optionally, the rod-shaped body 1 includes a hollow rod 11 and a partition structure 12 disposed in the hollow rod 11. The partition structure 12 separates the flow channel 101 and the return channel 102. The flow channel 101 and the return channel 102 are symmetrically arranged about the partition structure 12, so that the fluid flows more smoothly in the rod-shaped body 1, avoiding the situation where there is too little fluid in one of the fluid channels, which is conducive to further improving the temperature uniformity of the rod-shaped heating part.

[0050] It should also be noted that the heat from the flow channel 101 can be transferred to the return channel 102 through the partition structure 12, improving the temperature uniformity of the outer periphery of the hollow rod 11. Preferably, both the partition structure 12 and the hollow rod 11 are made of materials with high thermal conductivity. For example, both the partition structure 12 and the hollow rod 11 are made of aluminum alloy, or stainless steel or other metals or alloys.

[0051] Optionally, the partition structure 12 includes partition plates, that is, the partition structure 12 includes one or more partition plates, the flow channel 101 and the return channel 102 are located on opposite sides of the partition plates, and a heat transfer enhancement part 121 is provided protruding on at least one side of the partition plate. Specifically, the heat on one side of the heat transfer enhancement part 121 can be transferred to the partition plate and then transferred to another fluid channel through the partition plate. The heat is transferred between the adjacent flow channel 101 and the return channel 102, thereby improving the temperature uniformity of the fluid in the flow channel 101 and the return channel 102, which is beneficial to further improve the temperature uniformity of the outer periphery of the hollow rod 11.

[0052] Preferably, heat transfer enhancement sections 121 are provided on both sides of the partition plate to further improve the heat transfer effect, so that more heat from the fluid in the high-temperature delivery channel 101 can be transferred to the fluid in the low-temperature return channel 102, thereby balancing the temperature of the delivery channel 101 and the return channel 102 and improving temperature uniformity.

[0053] Optionally, the heat transfer enhancement section 121 includes a plurality of strip-shaped protrusions parallel to the centerline of the rod-shaped body 1. The heat transfer enhancement section 121 extends along the centerline of the hollow rod body 11 and has a gas guiding effect, which can reduce gas turbulence and improve the smoothness of fluid flow.

[0054] Optionally, the cross-section of the partition structure 12 is grid-like along the direction perpendicular to the axis of the rod-shaped body 1, thereby constructing multiple fluid channels. Preferably, the partition structure 12 is spider web-like, divided into several outer rings of flow channels 101 and several inner rings of return channels 102, with each flow channel 101 corresponding to a nearest return channel 102.

[0055] Optionally, all the fluid channels are arranged in a circumferential array around the center line of the rod-shaped body 1, and the flow channel 101 and the return channel 102 are arranged alternately around the array direction, thereby further improving the temperature uniformity of the rod-shaped body 1.

[0056] Optionally, the flow channel 101 and / or the return channel 102 are asymmetrical structures. It should be noted that even if the flow cross-sectional area of ​​the flow channel 101 is larger than that of the return channel 102, it still has the effect of improving the uniformity of the rod-shaped heating section, but the uniformity effect will decrease.

[0057] Optionally, the rod-shaped body 1 further includes a reserved functional cavity 103, which is not connected to the flow channel 101 or the return channel 102. It should be noted that the reserved functional cavity 103 is used for threading connecting wires, constructing an insulation cavity, or storing components. Preferably, the length of the reserved functional cavity 103 is the same as the length of the flow channel 101, but the length of the reserved functional cavity 103 can also be shorter than the length of the flow channel 101. Preferably, a fluid channel can be used as the reserved functional cavity 103.

[0058] Optionally, in the rod-shaped body 1, one flow channel 101 is connected to only one return channel 102. Alternatively, in the rod-shaped body 1, one flow channel 101 is connected to at least two return channels 102.

[0059] Optionally, a return structure 14 is formed at the tail end of the rod-shaped body 1. The return structure 14 forms a reversing communication hole 141 connecting the other end of the flow channel 101 and the other end of the return channel 102. Specifically, the return structure 14 is an integral structure with the rod-shaped body 1, and fluid return can be achieved without the need for additional installation of other components.

[0060] Optionally, the rod-shaped heating element further includes an end reversing member 2, which forms an insertion hole 21 for insertion into the tail end of the rod-shaped body 1. The insertion hole 21 forms a reversing communication cavity 201, which connects the other end of the flow channel 101 and the other end of the return channel 102. Specifically, the end reversing member 2 is detachably installed at the end of the rod-shaped body 1, and is a detachable structure, which facilitates inspection of the internal structure and replacement and maintenance.

[0061] Optionally, the end reversing member 2 forms several mutually separated reversing communication cavities 201; different reversing communication cavities 201 are used to connect different flow delivery channels 101 and return channels 102. Specifically, the mutually connected flow delivery channels 101 and return channels 102 are called complete foldback channels. The fluids in different complete foldback channels do not affect each other during flow, which can effectively reduce turbulence and also well plan the flow rate of each complete foldback channel.

[0062] Optionally, such as Figure 5 As shown, the insertion hole 21 includes a first columnar hole segment 211 and a second columnar hole segment 212. The first columnar hole segment 211 matches the outer peripheral shape of the rod-shaped body 1, and a positioning step 213 is formed between the second columnar hole segment 212 and the first columnar hole segment 211 to position and stop the end of the rod-shaped body 1. Specifically, the positioning step 213 makes the insertion depth of the tail end of the rod-shaped body 1 more reasonable and accurate, reduces the difficulty of assembly, and improves the assembly efficiency.

[0063] Example 2 This embodiment discloses a heating device, including a rod-shaped heating element as described in any one of Embodiment 1. For the specific structure of the heating device, please refer to [link / reference needed]. Figures 1 to 9 Or refer to Figures 10 to 17 .

[0064] Optionally, the heating device further includes a housing 3; the housing 3 is provided with a separated supply cavity 301 and a return cavity 302, the supply cavity 301 is provided with a first docking portion 31, and the return cavity 302 is provided with a second docking portion 32; when the rod-shaped body 1 is inserted into the housing 3 along a set direction, the first pair of interfaces are sealed and connected with the first docking portion 31, so that the supply cavity 301 is connected to the flow channel 101 to form a supply fluid passage; the second pair of interfaces are sealed and connected with the second docking portion 32, so that the return channel 102 is connected to the return cavity 302 to form a return fluid passage, and the supply fluid passage and the return fluid passage are separated from each other. In this embodiment, the supply fluid passage and the return fluid passage can be distinguished by a single insertion of the rod-shaped body 1, which can effectively reduce the assembly complexity and simplify the structure of the heating device.

[0065] Optionally, the housing 3 is provided with a plug hole 303; the first docking part 31 and the second docking part 32 are both provided in the plug hole 303, and one plug hole 303 is plugged into and connected to a rod-shaped heating part, which further simplifies the installation.

[0066] Optionally, the heating device further includes a seal 4; the seal 4 is installed in the insertion hole 303, and the seal 4 forms a first through hole 401 and a second through hole 402, as well as an intermediate partition 403 separating the first through hole 401 and the second through hole 402; the first through hole 401 connects the first mating interface and the first docking portion 31, and the second through hole 402 connects the second mating interface and the second docking portion 32. In this embodiment, the structure of the seal 4 is optimized, so that one seal 4 can simultaneously achieve the sealing effect of the supply fluid passage and the return fluid passage, further simplifying the structure, reducing the number of parts, and improving the stability of the seal.

[0067] Optionally, the heating device also includes a positioning and anti-rotation structure; the positioning and anti-rotation structure is used to restrict the rod-shaped heating part inserted into the insertion hole 303 from rotating around the center line of the insertion hole 303. Specifically, if the rod-shaped body 1 rotates relative to the center line of the insertion hole 303, cross-current may occur. The positioning and anti-rotation structure can effectively position the rod-shaped heating part and prevent it from rotating.

[0068] Optionally, the positioning and anti-rotation structure can be a snap-fit ​​structure 51, a slotted key structure, or an anti-rotation pin structure. For example... Figure 15 As shown, the snap-fit ​​structure 51 includes a snap-fit ​​groove 511 and a snap-fit ​​protrusion 512. The snap-fit ​​groove 511 can be disposed in the insertion hole 303 or on the rod-shaped heating part, and the snap-fit ​​protrusion 512 should be disposed on the rod-shaped heating part or in the insertion hole 303 respectively.

[0069] Optionally, the heating device further includes a fluid heating component and a fluid circulation drive device 6; the fluid heating component is used to heat the fluid flowing from the return chamber 302 to the supply chamber 301, and the fluid circulation drive device 6 drives the fluid to circulate along the supply chamber 301, the delivery channel 11, the return channel 12 and the return chamber 302.

[0070] It should also be noted that the supply cavity 301 and the return cavity 302 are provided with transition through holes, and the rod-shaped heating part is provided with an end reversing component 2, which is provided with a reversing connecting cavity 201. The complete circulation path of the fluid is that the fluid circulates along the supply cavity 301, the delivery channel 11, the reversing connecting cavity 201, the return channel 12, the return cavity 302, and the transition through hole.

[0071] Example 3 This embodiment discloses a drying device, including a heating device as described in any one of Embodiment 2.

[0072] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A rod-shaped heating element, characterized in that, It includes a rod-shaped body (1), and multiple rod-shaped bodies (1) are provided inside the rod-shaped body along the axial direction; At least one fluid channel forms a flow delivery channel (101) and at least one fluid channel forms a return channel (102). In one of the rod-shaped bodies (1), fluid can flow into the flow channel (101) from one end of the rod-shaped body (1) and flow in a first direction; the same stream of fluid can flow into the return channel (102) from the other end of the rod-shaped body (1) and flow out from the return channel (102) in the opposite direction of the first direction.

2. The rod-shaped heating part according to claim 1, characterized in that, The rod-shaped body (1) includes a hollow rod (11) and a partition structure (12) disposed in the hollow rod (11), the partition structure (12) separating the flow channel (101) and the return channel (102). The supply channel (101) and return channel (102) are symmetrically arranged with respect to the separation structure (12).

3. The rod-shaped heating part according to claim 2, characterized in that, The partition structure (12) includes a partition plate, the flow channel (101) and the return channel (102) are located on opposite sides of the partition plate, and a heat transfer enhancement part (121) is provided protruding on at least one side of the partition plate.

4. The rod-shaped heating part according to claim 3, characterized in that, The partition plate has heat transfer enhancement sections (121) on both opposite sides.

5. The rod-shaped heating part according to claim 4, characterized in that, The heat transfer enhancement section (121) includes a plurality of strip-shaped protrusions, which are parallel to the center line of the rod-shaped body (1); Along the axis perpendicular to the rod-shaped body (1), the cross-section of the partition structure (12) is grid-shaped.

6. The rod-shaped heating part according to claim 1, characterized in that, All the fluid channels are arranged in a circumferential array around the center line of the rod-shaped body (1), and the flow channel (101) and the return channel (102) are arranged alternately around the array direction.

7. The rod-shaped heating part according to claim 1, characterized in that, The flow channel (101) and / or the return channel (102) are asymmetrical structures.

8. The rod-shaped heating part according to claim 1, characterized in that, The rod-shaped body (1) also includes a reserved functional cavity (103), which is not connected to the flow channel (101) and not connected to the return channel (102).

9. The rod-shaped heating part according to claim 1, characterized in that, In the rod-shaped body (1), one of the flow channels (101) is connected to at least one return channel (102).

10. The rod-shaped heating part according to claim 1, characterized in that, The rod-shaped body (1) forms a return structure (14) at its tail end, and the return structure (14) forms a reversing communication hole (141) connecting the other end of the flow channel (101) and the other end of the return channel (102).

11. The rod-shaped heating part according to claim 1, characterized in that, It also includes an end reversing member (2), which forms an insertion hole (21) for insertion into the tail end of the rod-shaped body (1), and the insertion hole (21) forms a reversing communication cavity (201). The reversing communication cavity (201) connects the other end of the flow channel (101) and the other end of the return channel (102); a plurality of mutually separated reversing communication cavities (201) are formed in the end reversing member (2). Different reversing communication cavities (201) are used to connect different flow channels (101) and return channels (102).

12. A heating device, characterized in that, It includes a rod-shaped heating element as described in any one of claims 1 to 11.

13. The heating device according to claim 12, characterized in that, It also includes the housing (3); The housing (3) is provided with a separate supply cavity (301) and a return cavity (302). The supply cavity (301) is provided with a first docking part (31), and the return cavity (302) is provided with a second docking part (32). When the rod-shaped body (1) is inserted into the housing (3) in a set direction, the first pair of interfaces is sealed and connected with the first docking part (31), so that the supply cavity (301) is connected to the flow channel (101) to form a supply fluid passage; the second pair of interfaces is sealed and connected with the second docking part (32), so that the return channel (102) is connected to the return cavity (302) to form a return fluid passage, and the supply fluid passage and the return fluid passage are separated from each other.

14. The heating device according to claim 13, characterized in that, The housing (3) is provided with a plug hole (303); The first docking part (31) and the second docking part (32) are both provided in the insertion hole (303).

15. The heating device according to claim 14, characterized in that, It also includes a seal (4); The sealing element (4) is installed in the insertion hole (303), and the sealing element (4) has a first through hole (401) and a second through hole (402), as well as an intermediate partition (403) separating the first through hole (401) and the second through hole (402). The first through hole (401) connects the first pair of interfaces and the first docking part (31), and the second through hole (402) connects the second pair of interfaces and the second docking part (32).

16. The heating device according to claim 14, characterized in that, It also includes a positioning and anti-rotation structure; The positioning and anti-rotation structure is used to restrict the rod-shaped heating part inserted into the insertion hole (303) from rotating around the center line of the insertion hole (303).

17. The heating device according to claim 16, characterized in that, The positioning and anti-rotation structure is a snap-fit ​​structure (51), a slotted key structure, or an anti-rotation pin structure.

18. The heating device according to claim 16, characterized in that, It also includes a fluid heating component and a fluid circulation drive device (6); The fluid heating assembly is used to heat the fluid flowing from the return chamber (302) to the supply chamber (301), and the fluid circulation drive device (6) drives the fluid to circulate along the supply chamber (301), the delivery channel (11), the return channel (12) and the return chamber (302).

19. A drying device, characterized in that, It includes a heating device as described in any one of claims 12 to 18.

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