Heating pad with heat preservation function and preparation method

Abstract

The invention relates to the technical field of heating pads, in particular to a heating pad with a heat preservation function and a preparation method thereof.The heating pad comprises a heat pipe element, a heat transfer base material, a non-woven fabric layer, a cotton inner core and a protective jacket; the heat pipe element is arranged in a curve shape, and the two layers of heat transfer base materials are connected to the heat pipe element in a composite mode. The heat transfer base material is provided with a fixing groove which is used for fixing the heat pipe element; the cotton inner core comprises a first cotton layer, a second cotton layer and a built-in heat preservation foil layer, and the built-in heat preservation foil layer is arranged between the first cotton layer and the second cotton layer. The cotton inner core adopts a multi-layer design, the built-in heat preservation foil layer is located between the first cotton layer and the second cotton layer, the two layers of cotton fibers are tightly combined through a vibration mixing technology, and an integrated heat preservation layer is formed. Heat absorption of the external environment is effectively isolated, heat energy loss is reduced, the temperature in the heating pad is kept stable, the heat preservation time is prolonged, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heating pads, and in particular to a heating pad with heat preservation function and a preparation method thereof. Background Art

[0002] A heating pad is an electrical device designed to provide warmth and comfort. It usually consists of an insulating base, a heating element, and one or more layers of covering material designed to ensure even heat distribution and provide safety protection. In terms of construction, the heating element of the heating pad usually uses resistance wire, hot water pipe or electric heating film technology, which generates heat through the action of electric current. The heating element is cleverly embedded in the insulating base to prevent the current from directly contacting the user, thereby ensuring safety of use. The covering material is selected with good thermal conductivity and comfortable touch so that the generated heat is effectively transferred to the user and provides a soft touch.

[0003] Due to the internal structure design of the existing heating pad, the internal heat can not effectively keep warm after the internal heat is generated, and the internal heat will be lost quickly and cannot effectively keep warm. Therefore, it is necessary to make a new design for the existing heating pad structure. Summary of the invention

[0004] In order to solve the above problems, the cotton inner core of the present invention adopts a multi-layer design, wherein the built-in insulation foil layer is located between the first cotton layer and the second cotton layer, and the two layers of cotton fibers are tightly combined by vibration kneading technology to form an integrated insulation layer. It not only effectively isolates the absorption of heat by the external environment and reduces heat energy loss, but also maintains the temperature inside the heating pad stable, prolongs the insulation time, and improves the energy utilization efficiency of the heating pad with insulation and the preparation method.

[0005] The technical solution adopted by the present invention is: a heating pad with heat preservation, comprising a heat pipe element, a heat transfer substrate, a non-woven fabric layer, a cotton inner core and a protective outer jacket; the heat pipe element is arranged in a curved shape, the heat transfer substrate is provided with two layers, and the two layers of the heat transfer substrate are compositely connected to the heat pipe element; the heat transfer substrate is provided with a fixing groove, and the fixing groove is used to fix the heat pipe element; the non-woven fabric layer is arranged on one side of the heat transfer substrate to cover the heat pipe element in the fixing groove; the cotton inner core comprises a first cotton layer, a second cotton layer and a built-in heat preservation foil layer, the built-in heat preservation foil layer is arranged between the first cotton layer and the second cotton layer, and the cotton fibers between the first cotton layer and the second cotton layer are connected to form a whole through vibration mixing, so as to cover the built-in heat preservation foil layer inside; the first cotton layer is fitted with the non-woven fabric layer; the protective outer jacket is coated on the outside of the cotton inner core.

[0006] A further improvement to the above solution is that the heat pipe element is provided with a first port and a second port, and the first port and the second port extend to the outside of the protective jacket; the heat pipe element is a heating wire or a PVC water pipe.

[0007] A further improvement to the above scheme is that the heat transfer substrate is a copper foil layer or an aluminum foil layer; the heat transfer substrate is evenly distributed with through holes, the through holes are staggered with the fixed grooves, and the through holes are used to connect the non-woven fabric layers on both sides; a welding point is provided between the two non-woven fabric layers, and the welding point passes through the through hole to be used for connecting the two non-woven fabric layers.

[0008] A further improvement to the above scheme is that the non-woven fabric layer is provided with two layers, and the two non-woven fabric layers are respectively arranged on the outside of the heat transfer substrate, and the outer periphery of the two non-woven fabric layers is provided with heat-sealed edges, and the heat-sealed edges are used to heat-seal and connect the two non-woven fabric layers to form a coating cavity, and the coating cavity covers the heat pipe element and the heat transfer substrate.

[0009] A further improvement to the above scheme is that a first fiber layer is laminated to one side of the first cotton layer, and a second fiber layer is laminated to one side of the second cotton layer. The fibers of the first fiber layer and the second fiber layer are connected and integrated by vibration kneading.

[0010] A further improvement to the above solution is that metal fibers are arranged in both the first fiber layer and the second fiber layer.

[0011] A further improvement to the above solution is that the built-in thermal insulation foil layer is evenly distributed with perforations, and the fibers in the first fiber layer and the second fiber layer are connected through the perforations.

[0012] A further improvement to the above scheme is that the outside of the protective jacket is provided with an edge sealing member, which is used to encapsulate the outside of the protective jacket so as to encapsulate the heat pipe element, the heat transfer substrate, the non-woven fabric layer and the cotton inner core inside, and the protective jacket is provided with a fixed buckle, which passes through the heat transfer substrate, the non-woven fabric layer and the cotton inner core from one side of the protective jacket to the other side of the protective jacket so as to fix the heat transfer substrate, the non-woven fabric layer and the cotton inner core.

[0013] A method for preparing a heating pad, comprising the above-mentioned heating pad with heat preservation function; the preparation method comprises the following steps: Step S1, heat pipe shaping: preparing a heat pipe element, and then bending the heat pipe element into a specified shape for standby use; Step S2, substrate lamination: the copper foil is cut by a mold or a circular knife to form a heat transfer substrate, and one side of the heat transfer substrate is composited and connected with the non-woven fabric layer to fix the shape of the heat transfer substrate. This process prepares a connection layer composited with two layers of heat transfer substrate and non-woven fabric layer; Step S3, double-layer composite fixing: the prepared connecting layers of the two layers of heat transfer substrate and the non-woven fabric layer are respectively placed on the upper and lower surfaces of the heat pipe element after shaping, and then the connecting layers of the two layers of heat transfer substrate and the non-woven fabric layer are thermally composited and connected to the heat pipe element by a pressing machine; during the pressing process, the two layers of non-woven fabric layers are hot-melt-connected at the through holes on the heat transfer substrate by a hot-melt pressing needle, and the periphery of the non-woven fabric layer is hot-pressed and edge-sealed, so that the heat pipe element, the heat transfer substrate and the non-woven fabric layer are connected to form an integrated built-in layer; Step S4, preparation of cotton inner core: unwinding the first cotton layer, the built-in heat-insulating foil layer, and the second cotton layer in sequence, and compounding the three-layer structure by rolling, setting a vibration platform during the compounding process, and kneading the compounded three-layer structure by the vibration platform so that the fibers between the first cotton layer and the second cotton layer are connected to form a whole, and then cutting them to form a sheet-like cotton inner core; Step S5, stacking preparation: prepare two layers of the prepared cotton inner core, one layer as the bottom layer, put the inner layer prepared in step S3 on the bottom layer, and then use the other layer of the cotton inner core as the surface layer to stack and form a three-layer inner core structure; Step S6, pressing and packaging: reserve a loading port for the prepared protective jacket, then load the overlapped three-layer inner core structure into the protective jacket, and expose the first port and the second port of the heat pipe element, then send it to the edge sealing equipment to seal the edge of the protective jacket, and after the edge sealing is completed, perform injection molding and pressing, and fix the first port and the second port by injection molding and pressing to complete the preparation of the heating pad.

[0014] A further improvement to the above scheme is that in step S3, the laminating machine includes a laminating frame, a laminating driving module, a laminating fixed mold, a laminating upper mold, a laminating vacuum assembly and a laminating liquid supply assembly, the laminating driving module is arranged on the laminating frame, the laminating fixed mold is arranged on the laminating frame, the laminating upper mold is arranged on the laminating driving module, and the laminating driving module is used to drive the laminating upper mold to move relative to the laminating fixed mold.

[0015] A further improvement to the above scheme is that a first pipeline groove is provided on the pressing fixed mold, and a second pipeline groove is provided on the pressing upper mold. The first pipeline groove and the second pipeline groove are used to fix the heat pipe element so that the two layers of heat transfer substrate and the non-woven fabric layer are thermally composited and connected to the heat pipe element through the pressing fixed mold and the pressing upper mold; the hot melt pressing needle is arranged on the pressing fixed mold.

[0016] A further improvement to the above solution is that the pressing vacuum assembly is arranged on the pressing fixed mold, and is used to vacuum the first pipeline groove to discharge excess gas during the pressing process.

[0017] A further improvement to the above scheme is that the pressing liquid supply assembly is used to connect the first port and the second port of the heat pipe element so as to circulate liquid to the heat pipe element during the pressing process, and the heat pipe element will not deform during the vacuuming process.

[0018] A further improvement to the above scheme is that in step S4, two groups of vibration platforms are provided, and the two groups of vibration platforms respectively vibrate and mix the first cotton layer, the built-in thermal insulation foil layer, and the second cotton layer, and perform vibration and mixing in the X direction and the Y direction in sequence; the vibration platform includes an upper vibration platform and a lower vibration platform, and the upper vibration platform and the lower vibration platform are respectively used to vibrate and mix the first cotton layer and the second cotton layer; A further improvement to the above scheme is that a pressing platform is provided on one side of the vibration platform, and the pressing platform includes an upper pressing platform, a lower pressing platform and a pressing needle. The upper pressing platform is provided with a pressing needle, and the lower pressing platform is provided with a pinhole, and the pinhole is opposite to the pressing needle. During the pressing process, the pressing needle passes through the first cotton layer, the built-in thermal insulation foil layer, and the second cotton layer in sequence to connect the fibers between the first cotton layer and the second cotton layer; the pressing needle corresponds to the perforation of the built-in thermal insulation foil layer.

[0019] The beneficial effects of the present invention are: Compared with the existing heating pads, the heat pipe element of the present invention adopts a curved design. This innovative layout not only optimizes space utilization and enhances the efficiency of heat conduction. The curved shape helps to evenly distribute heat along the pipe body, avoiding local overheating or uneven heat problems that may be caused by traditional straight heat pipes. At the same time, the two layers of heat transfer substrate are tightly connected to the heat pipe element through composite technology, ensuring the effective transfer of heat energy to the surface of the heating pad, achieving a fast and uniform heating effect. The fixed groove designed on the heat transfer substrate provides a reliable fixed support for the heat pipe element. It not only enhances the stability of the structure and prevents the heat pipe from shifting or loosening during use, but also ensures the continuity and efficiency of the heat transfer path, further improving the overall performance of the heating pad.

[0020] The cotton inner core adopts a multi-layer design, in which the built-in insulation foil layer is located between the first cotton layer and the second cotton layer. The two layers of cotton fibers are tightly combined through vibration blending technology to form an integrated insulation layer. It not only effectively isolates the absorption of heat by the external environment and reduces heat energy loss, but also maintains the temperature inside the heating pad stable, prolongs the insulation time, and improves energy utilization efficiency. The non-woven fabric layer covers one side of the heat transfer substrate, which not only protects the heat pipe elements and the fixing grooves, but also has good air permeability. At the same time, the selection of the cotton inner core enhances the softness and skin-friendliness of the heating pad, and it can maintain a comfortable feeling even after long-term use. The protective coat wrapped on the outside not only provides an additional protective layer for the heating pad to prevent wear and damage in daily use, but also improves the durability and safety of the product through the selection of its materials (such as wear resistance, fire resistance, easy cleaning and other characteristics). In addition, the design of the protective coat also takes into account aesthetics, so that the heating pad meets the functional needs while also meeting the aesthetic standards of modern homes.

[0021] The present invention achieves a perfect combination of efficient heat conduction, good thermal insulation performance and comfortable user experience through innovative component design and structural optimization, providing users with a heating solution that is both safe and efficient, and has high practical value and market competitiveness.

[0022] Preparation method of heating pad, in step S1, the precise bending and shaping of the heat pipe element ensures that the heat can be efficiently transferred along the preset path, avoiding the problem of uneven heat distribution. As the core component of the heating system, the optimized design of the shape of the heat pipe not only improves the heating efficiency, but also enables the heating pad to be suitable for more diverse application scenarios, meeting the different needs of users for heating areas and shapes. Steps S2 and S3 form a heat transfer substrate by cutting copper foil, and composite connection with the non-woven fabric layer, which not only enhances the structural strength of the heat transfer substrate, but also improves the flexibility and durability of the material through the introduction of the non-woven fabric layer. In particular, the double-layer composite fixing process in S3 uses a press to achieve thermal composite connection, and at the same time, the non-woven fabric layer is hot-melt connected and hot-pressed by a hot melt press, ensuring that a tight and stable integrated structure is formed between the heat pipe element, the heat transfer substrate and the non-woven fabric layer, effectively preventing heat leakage and component loosening. In step S4, the three-layer cotton structure after compounding is blended by a vibration platform, which not only enhances the fiber connection between the first cotton layer and the second cotton layer, but also enables the built-in insulation foil layer to be more evenly distributed between the two cotton layers, thereby achieving an excellent insulation effect. This structural design not only improves the insulation performance of the heating pad, but also makes the heating pad more comfortable during use, avoiding the problem of local overheating or uneven temperature. In step S5, a three-layer inner core structure is formed by superimposing two layers of cotton inner core and built-in layer. This structural design not only enhances the overall strength and durability of the heating pad, but also provides better insulation and heat insulation effects for the heating pad. At the same time, the presence of the built-in layer enables the heating pad to transfer heat more effectively and improves the heating efficiency. In step S6, the three-layer inner core structure after superposition is loaded into the protective jacket through the reserved loading port, and the edge sealing and injection molding are performed, which not only ensures the integrity and aesthetics of the heating pad, but also fixes the port of the heat pipe element by injection molding, effectively preventing the intrusion of moisture and dust, and improving the safety and service life of the heating pad. In addition, the introduction of the protective jacket also provides an additional layer of protection for the heating pad, making the heating pad safer and more reliable during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of an explosion of a heating pad with heat preservation of the present invention; Figure 2 for Figure 1 Schematic diagram of the explosion from another perspective of the heating pad with insulation in the middle; Figure 3 for Figure 1 Schematic diagram of the explosion from another perspective of the heating pad with insulation in the middle; Figure 4 for Figure 1 middle Figure 1 An exploded view of the cotton core of a heating pad with insulation; Figure 5It is a structural schematic diagram of the pressing machine of the present invention; Figure 6 It is a structural schematic diagram of the vibration platform and the pressing platform of the present invention; Figure 7 The figure is a schematic diagram of the process of preparing the heating pad of the present invention.

[0024] Explanation of the accompanying drawings: heat pipe element 1, first port 11, second port 12, heat transfer substrate 2, fixed groove 21, through hole 22, non-woven fabric layer 3, welding point 31, heat sealing edge 32, cotton inner core 4, first cotton layer 41, first fiber layer 411, second cotton layer 42, second fiber layer 421, built-in thermal insulation foil layer 43, perforation 431, protective jacket 5, edge sealing member 51, fixed buckle 52, pressing machine 6, pressing frame 61, pressing drive module 62, pressing fixed mold 63, first pipeline groove 631, hot melt pressing needle 632, pressing upper mold 64, second pipeline groove 641, pressing vacuum assembly 65, pressing liquid supply assembly 66, vibration platform 7, upper vibration table 71, lower vibration table 72, pressing table 8, upper pressing table 81, lower pressing table 82, pressing needle 83. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Figure 1 to Figure 7As shown, in one embodiment of the present invention, a heating pad with heat preservation is involved, comprising a heat pipe element 1, a heat transfer substrate 2, a non-woven fabric layer 3, a cotton inner core 4 and a protective outer cover 5; the heat pipe element 1 is arranged in a curved shape, the heat transfer substrate 2 is provided with two layers, and the two layers of the heat transfer substrate 2 are connected to the heat pipe element 1 by composite connection; the heat transfer substrate 2 is provided with a fixing groove 21, and the fixing groove 21 is used to fix the heat pipe element 1; the non-woven fabric layer 3 is arranged on one side of the heat transfer substrate 2 to transfer the heat The tube element 1 is covered in the fixed groove 21; the cotton inner core 4 includes a first cotton layer 41, a second cotton layer 42 and a built-in insulation foil layer 43, the built-in insulation foil layer 43 is arranged between the first cotton layer 41 and the second cotton layer 42, and the first cotton layer 41 and the second cotton layer 42 are vibrated and kneaded so that the cotton fibers therebetween are connected to form a whole, so as to cover the built-in insulation foil layer 43 inside; the first cotton layer 41 is attached to the non-woven fabric layer 3; the protective jacket 5 is covered on the outside of the cotton inner core 4. The heat pipe element 1 of the present invention adopts a curved design. This innovative layout not only optimizes space utilization, but also enhances the conduction efficiency of heat energy. The curved shape helps to evenly distribute heat energy along the tube body, avoiding the problem of local overheating or uneven heat that may be caused by traditional linear heat pipes. At the same time, the two layers of heat transfer substrate 2 are tightly connected to the heat pipe element 1 through composite technology, ensuring the effective transfer of heat energy to the surface of the heating pad, and achieving a fast and uniform heating effect. The fixing groove 21 designed on the heat transfer substrate 2 provides a reliable fixing support for the heat pipe element 1. It not only enhances the stability of the structure and prevents the heat pipe from shifting or loosening during use, but also ensures the continuity and efficiency of the heat transfer path, further improving the overall performance of the heating pad.

[0028] The cotton inner core 4 adopts a multi-layer design, in which the built-in insulation foil layer 43 is located between the first cotton layer 41 and the second cotton layer 42, and the two layers of cotton fibers are closely combined by vibration blending technology to form an integrated insulation layer. It not only effectively isolates the absorption of heat by the external environment and reduces the loss of heat energy, but also maintains the temperature stability inside the heating pad, prolongs the insulation time, and improves the energy utilization efficiency. The non-woven fabric layer 3 covers one side of the heat transfer substrate 2, which not only plays a role in protecting the heat pipe element 1 and the fixing groove 21, but also has good air permeability. At the same time, the selection of the cotton inner core 4 enhances the softness and skin-friendliness of the heating pad, and can maintain a comfortable feeling even after long-term use. The protective coat 5 wrapped outside not only provides an additional protective layer for the heating pad to prevent wear and damage in daily use, but also improves the durability and safety of the product through the selection of its material (such as wear resistance, fire resistance, easy cleaning and other characteristics). In addition, the design of the protective coat 5 also takes into account aesthetics, so that the heating pad meets the needs in terms of function while also meeting the aesthetic standards of modern homes.

[0029] The present invention achieves a perfect combination of efficient heat conduction, good thermal insulation performance and comfortable user experience through innovative component design and structural optimization, providing users with a heating solution that is both safe and efficient, and has high practical value and market competitiveness.

[0030] The heat pipe element 1 is provided with a first port 11 and a second port 12, and the first port 11 and the second port 12 extend to the outside of the protective jacket 5; the heat pipe element 1 is a heating wire or a PVC water pipe. In this embodiment, the first port 11 and the second port 12 extend to the outside of the protective jacket 5, so as to achieve efficient heat transfer and control. When the heat pipe element 1 is a heating wire, it can respond quickly and generate a stable heat source, and connect to the external circuit through the port to achieve precise temperature control. This design not only improves the heating efficiency of the heating pad, but also ensures the uniform distribution of temperature, avoiding the problem of local overheating or uneven temperature. If the heat pipe element 1 adopts a PVC water pipe, the heat generated by the external heat source can be evenly transferred to the surface of the heating pad by using the principle of water circulation. The PVC water pipe has good corrosion resistance and high temperature resistance, which ensures the long-term stable operation of the heating pad. At the same time, by adjusting the water flow and temperature, the heating power of the heating pad can be flexibly controlled to meet the needs of different application scenarios.

[0031] The heat transfer substrate 2 is a copper foil layer or an aluminum foil layer; the heat transfer substrate 2 is evenly distributed with through holes 22, the through holes 22 are staggered with the fixed grooves 21, and the through holes 22 are used to connect the non-woven fabric layers 3 on both sides; a welding point 31 is provided between the two layers of non-woven fabric layers 3, and the welding point 31 passes through the through hole 22 to connect the two layers of non-woven fabric layers 3. Specifically, the non-woven fabric layer 3 is provided with two layers, and the two layers of non-woven fabric layers 3 are respectively arranged on the outside of the heat transfer substrate 2. The outer periphery of the two layers of non-woven fabric layers 3 is provided with a heat sealing edge 32, and the heat sealing edge 32 is used to heat-seal and connect the two layers of non-woven fabric layers 3 to form a coating cavity, and the coating cavity coats the heat pipe element 1 and the heat transfer substrate 2. In this embodiment, a copper or aluminum foil layer is used as the heat transfer substrate 2, which makes full use of the high thermal conductivity of these two metals. Copper and aluminum both have excellent thermal conductivity, which can quickly transfer heat from the heat source to the surface of the heating pad to achieve uniform heat distribution. This efficient heat conduction mechanism enables the heating pad to heat up quickly when started, reduces the preheating time, and improves the heating efficiency. Secondly, the design of the through holes 22 evenly distributed on the heat transfer substrate 2 not only reduces the overall weight, but also enhances the heat penetration. These through holes 22 allow the two layers of non-woven fabric layers 3 to be connected, so that heat can flow more smoothly inside the heating pad, further improving the heat conduction efficiency. At the same time, the staggered setting of the through holes 22 and the fixed grooves 21 avoids structural interference and ensures the stability and durability of the heating pad. Furthermore, the two layers of non-woven fabric layers 3 are connected through the through holes 22 through the fusion point 31. This connection method is not only firm and reliable, but also maintains the softness and air permeability of the heating pad. The presence of the fusion point 31 allows the two layers of non-woven fabric layers 3 to fit closely together to form an integral heating surface, thereby improving the heat preservation performance of the heating pad. Finally, the outer periphery of the two layers of non-woven fabric layers 3 is provided with a heat-sealed edge 32 to form a coating cavity, which completely envelops the heat pipe element 1 and the heat transfer substrate 2. This design not only protects the internal components from interference from the external environment, but also improves the sealing and heat preservation performance of the heating pad. In situations where long-term heat preservation is required, a heating pad with this structure can maintain a constant temperature for a longer period of time, providing users with a more comfortable use experience.

[0032] The first fiber layer 41 is laminated to one side of the first cotton layer 41, and the second fiber layer 421 is laminated to one side of the second cotton layer 42. The fibers of the first fiber layer 411 and the second fiber layer 421 are connected to form an integral body by vibration blending. Specifically, metal fibers are arranged in the first fiber layer 411 and the second fiber layer 421. The built-in thermal insulation foil layer 43 is evenly distributed with perforations 431, and the fibers in the first fiber layer 411 and the second fiber layer 421 are connected through the perforations 431. In this embodiment, firstly, the overall structural strength and durability of the mat are effectively enhanced by the laminating design of the first cotton layer 41 and the first fiber layer 411, and the second cotton layer 42 and the second fiber layer 421. This multi-layer composite structure not only improves the texture of the mat, but also ensures that the shape can be kept stable for a long time during use, and is not easy to deform or break. Secondly, the first fiber layer 411 and the second fiber layer 421 are tightly connected by vibration blending technology to form an integrated structure. This connection method not only improves the overall strength of the mat, but also makes the force on the mat more uniform in different directions, thereby improving the comfort of use. More importantly, the metal fibers embedded in the fiber layer not only enhance the thermal conductivity of the mat, but also provide a reliable carrier for heat transfer and heat preservation functions. In addition, the design of the built-in insulation foil layer 43 further enhances the thermal insulation performance of the mat. The perforations 431 on the insulation foil layer allow the fibers to pass through and connect to each other, forming a tighter insulation structure. This design not only reduces heat loss, but also improves the thermal efficiency of the mat, allowing the mat to maintain a comfortable temperature for a longer period of time.

[0033] The outside of the protective jacket 5 is provided with an edge seal 51, which is used to encapsulate the outside of the protective jacket 5 so as to encapsulate the heat pipe element 1, the heat transfer substrate 2, the non-woven fabric layer 3 and the cotton inner core 4 inside. The protective jacket 5 is provided with a fixed buckle 52, which passes through the heat transfer substrate 2, the non-woven fabric layer 3 and the cotton inner core 4 from one side of the protective jacket 5 to the other side of the protective jacket 5 to fix the heat transfer substrate 2, the non-woven fabric layer 3 and the cotton inner core 4. In this embodiment, the edge seal 51 carefully arranged on the outside of the protective jacket 5 effectively builds a solid barrier through its encapsulation effect, and tightly encapsulates the core components such as the heat pipe element 1, the heat transfer substrate 2, the non-woven fabric layer 3 and the cotton inner core 4 inside. This design not only improves the stability of the overall structure, but also ensures the stable operation of the internal components under complex environmental conditions, avoiding performance degradation or damage caused by external factors. The use of the edge banding 51 further enhances the sealing performance of the protective jacket 5, effectively preventing heat loss and the intrusion of external moisture, thereby improving the thermal insulation effect and durability of the thermal insulation heating pad. At the same time, the material and process selection of the edge banding 51 also fully consider the compatibility with the protective jacket 5, ensuring the aesthetics and coordination of the overall structure. In addition, the design of the fixed buckle 52 is the finishing touch. It cleverly passes through the heat transfer substrate 2, the non-woven fabric layer 3 and the cotton inner core 4, firmly fixing the components of each layer together, effectively preventing displacement and loosening during use. This design not only improves the structural stability of the thermal insulation heating pad, but also ensures the uniform transfer of heat inside, further improving the heating efficiency and thermal insulation effect.

[0034] See also Figure 1 to Figure 7 As shown, a method for preparing a heating pad with heat preservation comprises the following steps: Step S1, heat pipe shaping: preparing a heat pipe element 1, and then bending the heat pipe element 1 into a specified shape for standby use; Step S2, substrate lamination: the copper foil is cut by a mold or a circular knife to form a heat transfer substrate 2, and one side of the heat transfer substrate 2 is compositely connected with the non-woven fabric layer 3 to fix the shape of the heat transfer substrate 2. This process prepares a composite connection layer of two layers of the heat transfer substrate 2 and the non-woven fabric layer 3; Step S3, double-layer composite fixing: the prepared connection layers of the composite of the two layers of heat transfer substrate 2 and the non-woven fabric layer 3 are respectively placed on the upper and lower surfaces of the heat pipe element 1 after shaping, and then the connection layers of the two layers of heat transfer substrate 2 and the non-woven fabric layer 3 are thermally composited and connected to the heat pipe element 1 by a pressing machine; during the pressing process, the two layers of non-woven fabric layers 3 are thermally melted and connected on the through holes 22 on the heat transfer substrate 2 by hot-melt pressing needles 632, and the periphery of the non-woven fabric layer 3 is heat-pressed and sealed, so that the heat pipe element 1, the heat transfer substrate 2 and the non-woven fabric layer 3 are connected to form an integrated built-in layer; Step S4, preparation of the cotton inner core 4: unwinding the first cotton layer 41, the built-in heat-insulating foil layer 43, and the second cotton layer 42 in sequence, and compounding the three-layer structure by rolling, setting a vibration platform during the compounding process, and kneading the compounded three-layer structure by the vibration platform so that the fibers between the first cotton layer 41 and the second cotton layer 42 are connected to form a whole, and then cutting to form a sheet-like cotton inner core 4; Step S5, stacking preparation: prepare two layers of the prepared cotton inner core 4, one layer as the bottom layer, put the inner layer prepared in step S3 on the bottom layer, and then use the other layer of the cotton inner core 4 as the surface layer to stack and form a three-layer inner core structure; Step S6, pressing and packaging: reserve a loading port for the prepared protective jacket 5, then load the overlapped three-layer inner core structure into the protective jacket 5, and expose the first port 11 and the second port 12 of the heat pipe element 1, and then send it to the edge sealing equipment to seal the protective jacket 5, and after the edge sealing is completed, perform injection molding and pressing, and fix the first port 11 and the second port 12 by injection molding and pressing to complete the preparation of the heating pad.

[0035] In step S1, the precise bending and shaping of the heat pipe element 1 ensures that heat can be efficiently transferred along the preset path, avoiding the problem of uneven heat distribution. As the core component of the heating system, the optimized design of the shape of the heat pipe not only improves the heating efficiency, but also enables the heating pad to be suitable for more diverse application scenarios, meeting the different needs of users for heating areas and shapes. Steps S2 and S3 form a heat transfer substrate 2 by cutting copper foil, and composite connection with the non-woven fabric layer 3, which not only enhances the structural strength of the heat transfer substrate 2, but also improves the flexibility and durability of the material through the introduction of the non-woven fabric layer 3. In particular, the double-layer composite fixing process in S3 uses a press to achieve thermal composite connection, and at the same time, the non-woven fabric layer 3 is hot-melt connected and hot-pressed by a hot-melt pressure needle 632, ensuring that a tight and stable integrated structure is formed between the heat pipe element 1, the heat transfer substrate 2 and the non-woven fabric layer 3, effectively preventing heat leakage and loosening of components. In step S4, the composite three-layer cotton structure is blended by a vibration platform, which not only strengthens the fiber connection between the first cotton layer 41 and the second cotton layer 42, but also enables the built-in insulation foil layer 43 to be more evenly distributed between the two cotton layers, thereby achieving an excellent insulation effect. This structural design not only improves the insulation performance of the heating pad, but also makes the heating pad more comfortable during use, avoiding the problem of local overheating or uneven temperature. In step S5, a three-layer inner core structure is formed by superimposing two layers of cotton inner core 4 and the built-in layer. This structural design not only enhances the overall strength and durability of the heating pad, but also provides the heating pad with better insulation and heat insulation effects. At the same time, the presence of the built-in layer enables the heating pad to transfer heat more effectively, thereby improving the heating efficiency. In step S6, the stacked three-layer inner core structure is loaded into the protective jacket 5 through the reserved loading port, and the edge is sealed and injection molded, which not only ensures the integrity and aesthetics of the heating pad, but also fixes the port of the heat pipe element 1 through injection molding, effectively preventing the intrusion of moisture and dust, and improving the safety and service life of the heating pad. In addition, the introduction of the protective jacket 5 also provides an additional protective layer for the heating pad, making the heating pad safer and more reliable during use.

[0036] See also Figure 5As shown, in step S3, the laminating machine 6 includes a laminating frame 61, a laminating driving module 62, a laminating fixed mold 63, a laminating upper mold 64, a laminating vacuum assembly 65 and a laminating liquid supply assembly 66. The laminating driving module 62 is arranged on the laminating frame 61, the laminating fixed mold 63 is arranged on the laminating frame 61, and the laminating upper mold 64 is arranged on the laminating driving module 62. The laminating driving module 62 is used to drive the laminating upper mold 64 to move relative to the laminating fixed mold 63. The laminating fixed mold 63 is provided with a first pipeline groove 631, and the laminating upper mold 64 is provided with a second pipeline groove 641. The first pipeline groove 631 and the second pipeline groove 641 are used to fix the heat pipe element 1, so that the two layers of heat transfer substrate 2 and the non-woven fabric layer 3 are thermally composited and connected to the heat pipe element 1 through the laminating fixed mold 63 and the laminating upper mold 64; the hot melt pressing needle 632 is arranged on the laminating fixed mold 63. The pressing vacuum assembly 65 is arranged on the pressing fixed mold 63, and is used to vacuum the first pipe groove 631 to discharge excess gas during the pressing process. The pressing liquid supply assembly 66 is used to connect the first port 11 and the second port 12 of the heat pipe element 1, so as to circulate the liquid supply to the heat pipe element 1 during the pressing process, and the heat pipe element 1 will not be deformed during the vacuuming process. In this embodiment, the pressing machine 6 organically combines the core components such as the pressing frame 61, the pressing drive module 62, the pressing fixed mold 63, and the pressing upper mold 64 through a highly integrated design to form a high-precision and high-stability pressing system. In step S3, the pressing drive module 62 accurately drives the pressing upper mold 64 to move toward the pressing fixed mold 63. This process not only ensures the uniform distribution of the pressing force, but also greatly improves the accuracy of the pressing. More importantly, the first pipe groove 631 and the second pipe groove 641 respectively arranged on the pressing fixed mold 63 and the pressing upper mold 64 can accurately align and fix the heat pipe element 1, providing a solid foundation for the subsequent thermal composite connection. This precise pressing machine 6 system effectively ensures the close fit between the heat pipe element 1 and the two layers of heat transfer substrate 2 and the non-woven fabric layer 3, thereby realizing an efficient heat conduction path and improving the overall thermal efficiency of the heating pad. Furthermore, the setting of the pressing vacuum assembly 65 is a highlight of the structure of this pressing machine 6. The assembly is directly mounted on the pressing fixed mold 63 and can vacuum the first pipe groove 631 during the pressing process. This step is crucial because it can effectively remove excess gas between the thermal composite interface and avoid the formation of bubbles and gaps, thereby greatly improving the uniformity and tightness of the thermal composite. In addition, vacuuming can also promote the molecular-level bonding between the heat pipe element 1 and the substrate, enhancing the stability and durability of the overall structure. This process optimization not only improves the thermal conduction efficiency of the heating pad, but also extends its service life, making the final product more in line with the requirements of a high-performance thermal insulation heating pad.The pressing liquid supply assembly 66 can connect the first port 11 and the second port 12 of the heat pipe element 1 to realize the circulating liquid supply of the heat pipe element 1 during the pressing process. This design is particularly critical because during the vacuuming process, if the heat pipe element 1 lacks support inside, it is easy to deform due to the pressure difference, thereby affecting its thermal conductivity and the integrity of the overall structure. Through the circulating liquid supply, the liquid pressure balance inside the heat pipe element 1 can be maintained, effectively preventing its deformation and ensuring the stability of the shape of the heat pipe during the pressing process. This measure not only improves the product yield, but also ensures the stability and reliability of the heating pad under different working conditions. From the perspective of production efficiency, the pressing machine 6 has a high degree of automation and is easy to operate, which can greatly shorten the production cycle and improve production efficiency. At the same time, due to its reasonable design, it reduces manual intervention, reduces the scrap rate caused by improper operation, and effectively controls production costs.

[0037] See also Figure 6As shown, in step S4, two groups of vibration platforms 7 are provided, and the two groups of vibration platforms 7 respectively vibrate and mix the first cotton layer 41, the built-in heat-insulating foil layer 43, and the second cotton layer 42, and perform vibration and mixing in the X direction and the Y direction in sequence; the vibration platform 7 includes an upper vibration platform 71 and a lower vibration platform 72, and the upper vibration platform 71 and the lower vibration platform 72 are respectively used to vibrate and mix the first cotton layer 41 and the second cotton layer 42; specifically, a pressing platform 8 is provided on one side of the vibration platform 7 The pressing platform 8 includes an upper pressing platform 81, a lower pressing platform 82 and a pressing needle 83. The upper pressing platform 81 is provided with a pressing needle 83, and the lower pressing platform 82 is provided with a pinhole. The pinhole is opposite to the pressing needle 83. During the pressing process, the pressing needle 83 passes through the first cotton layer 41, the built-in thermal insulation foil layer 43, and the second cotton layer 42 in sequence, so that the fibers between the first cotton layer 41 and the second cotton layer 42 are connected; the pressing needle 83 corresponds to the perforation 431 of the built-in thermal insulation foil layer 43. In this embodiment, two groups of vibration platforms 7 are vibrated and blended for the first cotton layer 41, the built-in thermal insulation foil layer 43 and the second cotton layer 42 respectively. This design not only ensures the close combination between the layers of materials, but also effectively breaks the fiber bundle structure inside the cotton layer through alternating vibrations in the X direction and the Y direction, and promotes the interweaving and penetration between fibers. This vibration blending method greatly improves the uniformity and density of the material, so that the thermal insulation performance of the final product is significantly improved. Furthermore, the vibration platform 7 is divided into an upper vibration platform 71 and a lower vibration platform 72, which are used to vibrate and blend the first cotton layer 41 and the second cotton layer 42 respectively. This upper and lower separation design not only improves work efficiency, but also ensures precise control during the vibration process, avoiding material displacement or deformation problems caused by single-layer vibration. At the same time, the synergistic effect of the upper and lower vibration platforms 72 enables the two layers of cotton to form a tighter bonding interface during the vibration process, laying a solid foundation for the subsequent pressing steps. The pressing platform 8 realizes precise pressing of the first cotton layer 41, the built-in thermal insulation foil layer 43 and the second cotton layer 42 by setting a pressing needle 83 on the upper pressing platform 81 and a pinhole corresponding to the pressing needle 83 on the lower pressing platform 82. The pressing needle 83 passes through the three layers of material in sequence, which not only enhances the connection strength between the layers, but also makes the connection between the fibers more firm, effectively preventing the problem of the thermal insulation foil layer falling off or displacement. At the same time, the corresponding design of the pressing needle 83 and the perforation 431 of the built-in thermal insulation foil layer 43 ensures that the thermal insulation foil layer will not be damaged during the pressing process, thereby retaining its excellent thermal insulation performance. In addition, the use of the pressing table 8 also greatly improves production efficiency. Compared with the traditional pressing method, the cooperation between the pressing needle 83 and the pinhole makes the pressing process faster and more accurate, reducing the error and time cost of manual operation. At the same time, the pressing table 8 has a high degree of automation and can easily adapt to the needs of large-scale production, providing strong support for the industrial production of thermal insulation heating pads.

[0038] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A heating pad with heat preservation, characterized in that: It comprises a heat pipe element, a heat transfer substrate, a non-woven fabric layer, a cotton inner core and a protective outer cover; the heat pipe element is arranged in a curved shape, the heat transfer substrate is provided with two layers, and the two layers of the heat transfer substrate are compositely connected to the heat pipe element; the heat transfer substrate is provided with a fixing groove, and the fixing groove is used to fix the heat pipe element; The non-woven fabric layer is arranged on one side of the heat transfer substrate to cover the heat pipe element in the fixed groove; the cotton inner core comprises a first cotton layer, a second cotton layer and a built-in thermal insulation foil layer, the built-in thermal insulation foil layer is arranged between the first cotton layer and the second cotton layer, and the first cotton layer and the second cotton layer are vibrated and kneaded so that the cotton fibers therebetween are connected to form a whole, so as to cover the built-in thermal insulation foil layer; The first cotton layer is attached to the non-woven fabric layer; and the protective outer cover is wrapped around the outside of the cotton inner core.

2. The heat-insulating heating pad according to claim 1, characterized in that: The heat pipe element is provided with a first port and a second port, wherein the first port and the second port extend to the outside of the protective jacket; The heat pipe element is a heating wire or a PVC water pipe.

3. The heat-insulating heating pad according to claim 1, characterized in that: The heat transfer substrate is a copper foil layer or an aluminum foil layer; the heat transfer substrate is evenly distributed with through holes, the through holes are staggered with the fixed grooves, and the through holes are used to connect the non-woven fabric layers on both sides; a welding point is arranged between the two non-woven fabric layers, and the welding point passes through the through hole to be used for connecting the two non-woven fabric layers.

4. The heat-insulating heating pad according to claim 3, characterized in that: The non-woven fabric layer is provided with two layers, and the two non-woven fabric layers are respectively arranged on the outside of the heat transfer substrate. The periphery of the two non-woven fabric layers is provided with heat-sealed edges, and the heat-sealed edges are used to heat-seal and connect the two non-woven fabric layers to form a covering cavity, and the covering cavity covers the heat pipe element and the heat transfer substrate.

5. The heat-insulating heating pad according to claim 1, characterized in that: A first fiber layer is laminated to one side of the first cotton layer, and a second fiber layer is laminated to one side of the second cotton layer. The first fiber layer and the second fiber layer are vibrated and kneaded so that the fibers therebetween are connected and integrated. Metal fibers are arranged in both the first fiber layer and the second fiber layer.

6. The heat-insulating heating pad according to claim 5, characterized in that: The built-in thermal insulation foil layer is evenly distributed with perforations, and the fibers in the first fiber layer and the second fiber layer are connected through the perforations.

7. The heat-insulating heating pad according to claim 1, characterized in that: The outside of the protective jacket is provided with an edge sealing piece, which is used to encapsulate the outside of the protective jacket so as to encapsulate the heat pipe element, the heat transfer substrate, the non-woven fabric layer and the cotton inner core inside. The protective jacket is provided with a fixing buckle, which passes through the heat transfer substrate, the non-woven fabric layer and the cotton inner core from one side of the protective jacket to the other side of the protective jacket so as to fix the heat transfer substrate, the non-woven fabric layer and the cotton inner core.

8. A method for preparing a heating pad, comprising the heating pad with heat preservation according to any one of claims 1 to 7; the preparation method comprises the following steps: Step S1, heat pipe shaping: preparing a heat pipe element, and then bending the heat pipe element into a specified shape for standby use; Step S2, substrate lamination: the copper foil is cut by a mold or a circular knife to form a heat transfer substrate, and one side of the heat transfer substrate is composited and connected with the non-woven fabric layer to fix the shape of the heat transfer substrate. This process prepares a connection layer composited with two layers of heat transfer substrate and non-woven fabric layer; Step S3, double-layer composite fixing: the prepared connecting layers of the two layers of heat transfer substrate and the non-woven fabric layer are respectively placed on the upper and lower surfaces of the heat pipe element after shaping, and then the connecting layers of the two layers of heat transfer substrate and the non-woven fabric layer are thermally composited and connected to the heat pipe element by a pressing machine; during the pressing process, the two layers of non-woven fabric layers are hot-melt-connected at the through holes on the heat transfer substrate by a hot-melt pressing needle, and the periphery of the non-woven fabric layer is hot-pressed and edge-sealed, so that the heat pipe element, the heat transfer substrate and the non-woven fabric layer are connected to form an integrated built-in layer; Step S4, preparation of cotton inner core: unwinding the first cotton layer, the built-in heat-insulating foil layer, and the second cotton layer in sequence, and compounding the three-layer structure by rolling, setting a vibration platform during the compounding process, and kneading the compounded three-layer structure by the vibration platform so that the fibers between the first cotton layer and the second cotton layer are connected to form a whole, and then cutting them to form a sheet-like cotton inner core; Step S5, stacking preparation: prepare two layers of the prepared cotton inner core, one layer as the bottom layer, put the inner layer prepared in step S3 on the bottom layer, and then use the other layer of the cotton inner core as the surface layer to stack and form a three-layer inner core structure; Step S6, pressing and packaging: reserve a loading port for the prepared protective jacket, then load the overlapped three-layer inner core structure into the protective jacket, and expose the first port and the second port of the heat pipe element, then send it to the edge sealing equipment to seal the edge of the protective jacket, and after the edge sealing is completed, perform injection molding and pressing, and fix the first port and the second port by injection molding and pressing to complete the preparation of the heating pad.

9. The method for preparing the heating pad according to claim 8, characterized in that: In the step S3, the laminating machine includes a laminating frame, a laminating driving module, a laminating fixed mold, a laminating upper mold, a laminating vacuum assembly, and a laminating liquid supply assembly, wherein the laminating driving module is arranged on the laminating frame, the laminating fixed mold is arranged on the laminating frame, the laminating upper mold is arranged on the laminating driving module, and the laminating driving module is used to drive the laminating upper mold to move relative to the laminating fixed mold; The pressing and fixing mold is provided with a first pipeline groove, and the pressing and upper mold is provided with a second pipeline groove, and the first pipeline groove and the second pipeline groove are used to fix the heat pipe element, so that the two layers of heat transfer substrate and the non-woven fabric layer are thermally composited and connected to the heat pipe element through the pressing and fixing mold and the pressing and upper mold; the hot melt pressing needle is provided on the pressing and fixing mold; The pressing vacuum assembly is arranged on the pressing fixed mold and is used to vacuum the first pipeline groove to discharge excess gas during the pressing process; The pressing liquid supply assembly is used to connect the first port and the second port of the heat pipe element so as to circulate liquid supply to the heat pipe element during the pressing process, and the heat pipe element will not be deformed during the vacuuming process.

10. The method for preparing a heating pad according to claim 8, characterized in that: In the step S4, two groups of vibration platforms are provided, and the two groups of vibration platforms respectively vibrate and mix the first cotton layer, the built-in insulation foil layer, and the second cotton layer, and perform vibration and mixing in the X direction and the Y direction in sequence; the vibration platform includes an upper vibration platform and a lower vibration platform, and the upper vibration platform and the lower vibration platform are respectively used to vibrate and mix the first cotton layer and the second cotton layer; A pressing platform is provided on one side of the vibration platform, and the pressing platform includes an upper pressing platform, a lower pressing platform and a pressing needle. The upper pressing platform is provided with a pressing needle, and the lower pressing platform is provided with a pinhole, and the pinhole is opposite to the pressing needle. During the pressing process, the pressing needle sequentially passes through the first cotton layer, the built-in thermal insulation foil layer, and the second cotton layer, so that the fibers between the first cotton layer and the second cotton layer are connected; The pressing pins correspond to the perforations of the built-in thermal insulation foil layer.

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