Induction coil device suitable for magnetic particle uniform heating smoking set and its manufacturing method

Abstract

An induction coil device suitable for a magnetic particle uniform heating smoking set and its manufacturing method, the device comprises a device housing with an internal passage, the device housing has a two-layer housing structure, a vacuum intermediate layer is formed between the two layers of the inner housing and the outer housing, an induction coil (1), a heat insulating material layer (2) and an electromagnetic shielding coating (3) are disposed in the vacuum intermediate layer, the induction coil (1) is disposed by wrapping around the outer side wall of the inner housing (4), the heat insulating material layer (2) wraps around the outside of the induction coil (1), the electromagnetic shielding coating (3) is disposed on the inner side wall of the outer housing (5), and the vacuum gap between the electromagnetic shielding coating (3) and the heat insulating material layer (2) forms a vacuum insulating intermediate layer. The induction coil device has both electromagnetic shielding and heat insulating properties, so as to achieve a good shielding effect against electromagnetic radiation, to largely block the heat of the induction coil itself, to reduce the eddy current loss of the induction coil, and to achieve the purpose of reducing the temperature of the smoking set housing.

Description

[Technical field]

[0001] The present invention relates to the technical field of heated smoking sets for tobacco products, and in particular to an induction coil device suitable for a magnetic particle uniform heated smoking set and a manufacturing method thereof. [Background technology]

[0002] The magnetic particle uniform heating smoking set applies electromagnetic induction heating technology, which generates an alternating electromagnetic field by an induction coil, and puts a ferromagnetic element inserted into a heated cigarette into the alternating electromagnetic field to generate heat and release the substance in the heated cigarette for smoking. During electromagnetic induction heating, the induction coil will generate electromagnetic wave radiation and self-heating phenomenon, so it is necessary to design an electromagnetic shielding and heat insulation device. Most electromagnetic shielding and heat insulation devices use discrete modules for corresponding processing, which can meet certain design requirements, but have problems such as not ideal electromagnetic shielding effect and low heat insulation efficiency. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an induction coil device and its manufacturing method suitable for a magnetic particle uniform heating smoking set, and aims to innovatively develop an induction coil device that integrates the performances of electromagnetic shielding and thermal insulation and heat preservation, thereby achieving a good shielding effect against electromagnetic radiation, greatly insulating the heat of the induction coil itself, reducing the eddy current loss of the induction coil, and reducing the temperature of the smoking set housing. [Means for solving the problem]

[0004] The present invention is implemented by the following technical solutions.

[0005] The induction coil device is suitable for a magnetic particle uniform heating smoking set, comprising a device housing having an internal passageway, the device housing having a two-layer housing structure, a vacuum intermediate layer being formed between the two-layer housing of the inner housing and the outer housing, an induction coil, a heat insulating material layer, and an electromagnetic shielding coating being disposed in the vacuum intermediate layer, the induction coil being wound around the outer side wall of the inner housing, the heat insulating material layer wrapping around the outside of the induction coil, the electromagnetic shielding coating being disposed on the inner side wall of the outer housing, and a vacuum gap between the electromagnetic shielding coating and the heat insulating material layer being formed as a vacuum insulating intermediate layer.

[0006] In a preferred solution for the above device, the induction coil is provided at each end with an end conductive contact leading out from the outer housing.

[0007] As a preferred solution for the above device, the middle stage of the induction coil is provided with at least one middle stage conductive contact which is led out from the outer housing.

[0008] In a preferred solution of the above device, the material of the outer housing is one of metallic electromagnetic shielding material, surface conductive electromagnetic shielding material, or filled composite electromagnetic shielding material.

[0009] In a preferred solution of the above device, the material of the inner housing is an insulating material.

[0010] In a preferred solution for the above device, the electromagnetic shielding coating is formed by applying a conductive coating to the inner sidewall of the outer housing.

[0011] As a preferred solution for the above device, the heat insulating layer is composed of a matrix formed by mixing one or more of glass fiber, aerogel, foam, and fiber cloth, and an electroplating layer formed by electroplating a metal or conductive material on the surface of the matrix.

[0012] The present invention further provides a method for manufacturing an induction coil device suitable for a magnetic particle uniform heating smoking set, the induction coil device being the induction coil device described above, and the method for manufacturing the induction coil device includes: Step 1: producing an insulating sheet using an insulating material, wrapping the insulating sheet around the outside of the induction coil and sealing it to form a ring-shaped insulating layer; 2. Grinding the insulating material into a powder, adding an adhesive and an aqueous additive, and mixing and stirring to prepare an insulating slurry, and injecting the insulating slurry into an inner housing mold and sintering it at high temperature to manufacture the inner housing; 3. manufacturing the outer housing using an electromagnetic shielding material so that the outer housing has an electromagnetic shielding function; Step 4 applies an electromagnetic shielding material to the inner sidewall of the outer housing to form the electromagnetic shielding coating; and The process is carried out in sequence according to step 4, which comprises mounting the induction coil on the outside of the inner housing, mounting the outer housing on the outside of the heat insulating layer while preventing contact between the electromagnetic shielding coating on the inside of the outer housing and the heat insulating layer, sealing and integrating the upper and lower ends of the inner and outer housings, and subjecting the annular cavity between the inner and outer housings to a vacuum treatment to form a vacuum intermediate layer between the two-layer housing of the inner and outer housings.

[0013] As a preferred solution of the above manufacturing method, end conductive contacts are provided at both ends of the induction coil, and at least one middle stage conductive contact is provided in the middle stage of the induction coil, and the end conductive contacts and the middle stage conductive contacts are respectively drawn out through drawing holes pre-installed in the outer housing, and the gaps between the drawing holes of the outer housing and the corresponding conductive contacts are insulated and sealed. Effect of the Invention

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The induction coil device suitable for the magnetic particle uniform heating smoking set provided by the present invention effectively integrates a heat insulating layer and an electromagnetic shielding coating, so that the device has both electromagnetic shielding performance and heat insulating performance, and the electromagnetic shielding effect and heat insulating effect of the induction coil device are greatly improved. In addition, the device housing adopts a two-layer housing structure, and in addition to the heat insulating layer, a vacuum gap between the electromagnetic shielding coating and the heat insulating layer is formed as a vacuum insulation intermediate layer, so that the heat insulating performance is further enhanced, the loss caused by heat leakage is effectively prevented, and the cigarette heating efficiency is greatly improved.

[0016] 2. The method for manufacturing an induction coil device suitable for the magnetic particle uniform heating smoking set provided by the present invention is simple and easy to operate, highly efficient, low-cost, and has a high manufacturing yield rate and low loss. The induction coil device manufactured by this method is: First, the induction coil device manufactured is an integrated structure that combines the functions of thermal insulation and electromagnetic shielding, and adopts double electromagnetic shielding, which has the advantage of greatly improving the electromagnetic shielding efficiency. Secondly, the vacuum intermediate layer constructed by the induction coil device manufactured can effectively reduce the energy loss caused by the self-heating of the induction coil and can also greatly block the heat transfer to the outside of the device housing, thus reducing the temperature of the housing surface of the magnetic particle uniform heating smoking set body; In addition, the manufactured induction coil device has the function of adjusting the inductance value, and the multiple conductive contacts drawn out make it convenient to selectively connect to the electromagnetic oscillation circuit, which has the advantage of being adaptable to the design of heated smoking sets with different electromagnetic oscillation frequencies. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a cross-sectional view of the present invention in a used state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The following provides a detailed description of the examples of the present invention. The examples are implemented on the basis of the technical solutions of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of protection of the present invention is not limited to the following examples.

[0019] Please refer to Fig. 1. This embodiment provides an induction coil device suitable for magnetic particle uniform heating smoking set, the induction coil device includes a device housing with a passage inside, the device housing has a two-layer housing structure, a vacuum intermediate layer is formed between the two-layer housing of the inner housing and the outer housing, the induction coil 1, the heat insulating material layer 2 and the electromagnetic shielding coating 3 are disposed in the vacuum intermediate layer, the induction coil 1 is disposed by wrapping around the outer side wall of the inner housing 4, the heat insulating material layer 2 wraps around the outside of the induction coil 1, the electromagnetic shielding coating 3 is disposed on the inner side wall of the outer housing 5, and the vacuum gap between the electromagnetic shielding coating 3 and the heat insulating material layer 2 is formed as a vacuum heat insulating intermediate layer 6.

[0020] Both ends of the induction coil 1 are provided with end conductive contacts 7 that are drawn out from the outer housing 5. At least one middle stage conductive contact 8 that is drawn out from the outer housing 5 is provided at a middle stage of the induction coil 1. Any two different conductive contacts can be selected as needed to be connected to an electromagnetic oscillation circuit, and different numbers of coil turns can be selected as needed to form different values ​​of inductance and generate AC signals with different resonant frequencies.

[0021] The wire diameter, winding pitch, number of turns, and inductance value of induction coil 1 satisfy the following relationships: 0.5 mm< wire diameter< 2.5 mm, 0.05 mm< winding pitch< 0.5 mm, 6< number of turns< 14, and 0.1 uH< inductance value< 35 uH.

[0022] The material of the outer housing 5 is one of metallic electromagnetic shielding material, surface conductive electromagnetic shielding material, or filled composite electromagnetic shielding material. The outer housing 5 adopts the electromagnetic shielding material, which can function as a rigid support for the device housing, and at the same time, together with the electromagnetic shielding coating 3 on the inside, can provide a double electromagnetic shielding effect.

[0023] The inner housing 4 is made of an insulating material, and may be made of one of glass, ceramics, and plastic, or a mixture of two of them. The inner housing 4 is made of an insulating material, which insulates the induction coil 1 and prevents damage to the insulating coating layer of the induction coil 1, which may cause electric leakage, thereby eliminating potential safety hazards.

[0024] The electromagnetic shielding coating 3 is formed by applying a conductive coating to the inner sidewall of the outer housing 5 .

[0025] The heat insulating material layer 2 is composed of a matrix formed by mixing one or more of glass fiber, aerogel, foam, and fiber cloth, and an electroplated layer formed by electroplating a metal or conductive material onto the surface of the matrix.

[0026] This embodiment further discloses a manufacturing method of an induction coil device suitable for a magnetic particle uniform heating smoking set, and the manufacturing method of the induction coil device is carried out in sequence according to the following steps.

[0027] In step 1, a heat insulating sheet is manufactured using a heat insulating material. Specifically, one or more of glass fiber, aerogel, foam, and fiber cloth are selected and mixed to manufacture a heat insulating gel using an organic-inorganic hybrid method, and the heat insulating gel is freeze-dried to freeze the liquid in the pores of the heat insulating gel and sublimate it under vacuum conditions to manufacture a matrix of the heat insulating sheet. Furthermore, if necessary, metal and conductive materials are electroplated on the surface of the matrix of the heat insulating sheet to form an electroplated layer of the heat insulating sheet, and the matrix and the electroplated layer together form a heat insulating sheet, and the heat insulating sheet is wrapped around the outside of the induction coil 1 and sealed to form a ring-shaped heat insulating material layer 2.

[0028] In process 2, the insulating material was ground into a powder, and an adhesive and aqueous additive were added and mixed and stirred to prepare an insulating slurry, which was then poured into a mold for the inner housing 4 and sintered at high temperature to manufacture the inner housing 4. Specifically, one or two of glass, ceramics, and plastic were selected and mixed, ground into nanometer-level fine powder, and an adhesive and aqueous additive were added and mixed and stirred, and the mixture was then poured into a mold for the inner housing 4 to be molded, and sintered at high temperature to manufacture the inner housing 4.

[0029] In step 3, the outer housing 5 was manufactured using an electromagnetic shielding material so that the outer housing 5 had an electromagnetic shielding function.

[0030] In step 4, an electromagnetic shielding material was applied to the inner sidewall of the outer housing 5 to form the electromagnetic shielding coating 3. Specifically, a conductive coating was applied to the inner sidewall of the outer housing 5 by one or a combination of means such as thermal spraying, chemical plating, vapor deposition, and screen printing to form the electromagnetic shielding coating 3 having a thickness of 25 to 300 um.

[0031] In step 4, the induction coil 1 is mounted on the outside of the inner housing 4, and the outer housing 5 is mounted on the outside of the heat insulating material layer 2, so that the electromagnetic shielding coating 3 on the inside of the outer housing 5 does not come into contact with the heat insulating material layer 2. Then, the upper and lower ends of the inner housing 4 and the outer housing 5 are sealed and integrated, and the annular cavity between the inner housing 4 and the outer housing 5 is vacuum treated, forming a vacuum intermediate layer between the two-layer housing of the inner housing and the outer housing.

[0032] End conductive contacts 7 are provided at both ends of the induction coil 1, and at least one middle stage conductive contact 8 is provided in the middle stage of the induction coil 1. The end conductive contacts 7 and the middle stage conductive contacts 8 are each drawn out from drawing holes previously installed in the outer housing 5, and the gaps between the drawing holes of the outer housing 5 and the corresponding conductive contacts are insulated and sealed.

[0033] In step 3 of the above manufacturing method, the material of the outer housing 5 can be one of three types of electromagnetic shielding materials, so when the outer housing 5 is made of a metal electromagnetic shielding material, a ferromagnetic material or a metal conductive material can be selected, the ferromagnetic material includes iron, cobalt, nickel, etc., and the metal conductive material includes silver, copper, aluminum, etc. The manufacturing method is to mix the metal electromagnetic shielding material and grind it into nanometer-level fine powder, stir it uniformly, melt it, and then put it into a cast iron housing mold and anneal it to manufacture the outer housing 5.

[0034] When the outer housing 5 is made of a surface-conductive electromagnetic shielding material, the manufacturing method thereof is to first use any material to manufacture the housing body of the device housing, and then use one or a combination of the following means: thermal spraying, electroplating, vapor deposition, and screen printing to thinly coat the surface of the housing body with a conductive coating to manufacture the outer housing 5.

[0035] When the outer housing 5 is made of a filled composite type electromagnetic shielding material, the manufacturing method thereof is to use a polymer resin as a matrix, add a certain amount of conductive filler thereto, and manufacture the outer housing 5 by melt kneading, solution mixing, in-situ polymerization, and co-precipitation.

[0036] The polymeric resin material provides the outer housing 5 with processability and some degree of thermal insulation, and includes one or more synthetic products of polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP), ABS resin, polycarbonate (PC), nylon, polyetheretherketone (PEEK), and polyethersulfone (PES).

[0037] The conductive filler includes one or a mixture of carbon-based, metal-based, composite-based, and polymer-based fillers, the carbon-based conductive fillers are mainly carbon black, graphene, carbon nanotubes, and carbon fibers, the metal-based conductive fillers are mainly one or an alloy of the metals silver, copper, nickel, and aluminum, the composite-based conductive fillers are mainly one or a mixture of silver-plated glass microbeads, nickel-plated graphene, nickel-plated carbon fiber, cobalt-plated graphene, and cobalt-plated carbon fiber, and the polymer-based conductive fillers are mainly one or a mixture of polyaniline, polypyrrole, and polythiophene.

[0038] When in use, the induction coil device cooperates with the inductance heating body 10 to form a magnetic particle uniform heating smoking set, the base 11 of the inductance heating body 10 is placed on a table surface, the induction coil device is placed on the base 11 of the inductance heating body 10, and the mounting boss 12 on the base 11 is used to limit the position of the passage in cooperation with the passage, and the base 11 of the inductance heating body 10 seals the bottom of the passage of the device housing. When heating, the cigarette 9 is inserted downward from the top of the passage of the device housing until the main body of the inductance heating body 10 is inserted into the cigarette 9, and the two conductive contacts are selected and connected to the external electromagnetic oscillation circuit, the induction coil 1 is energized to generate an electromagnetic field, and the inductance heating body 10 cuts off the AC electromagnetic field to generate heat and heat the cigarette 9 sufficiently. The outer housing 5 on the side wall of the induction coil device and the electromagnetic shielding coating 3 on the inside of the outer housing 5 can doubly suppress the electromagnetic field generated by the induction coil 1 from leaking to the outside, and the insulating heat-retaining material layer 2 and the vacuum insulation intermediate layer 6 can achieve double insulating heat-retaining performance, improving heating efficiency.

[0039] The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. [Explanation of symbols]

[0040] 1: Induction coil 2: Insulation layer 3:Electromagnetic shielding coating 4: Inner housing 5: Outer housing 6: Vacuum insulation intermediate layer 7: End conductive contact 8: Middle conductive contact 9: Cigarette 10: Inductance heater 11: Bass 12: Mounting boss

Claims

1. An induction coil device suitable for a magnetic particle uniform heating smoking set, comprising a device housing with a passage therein, the device housing having a two-layer housing structure, a vacuum intermediate layer is formed between the two-layer housing of an inner housing and an outer housing, the induction coil, the heat insulating material layer, and the electromagnetic shielding coating are provided in the vacuum intermediate layer, the induction coil is provided by wrapping around the outer side wall of the inner housing, the heat insulating material layer wraps around the outside of the induction coil, the electromagnetic shielding coating is provided on the inner side wall of the outer housing, and the vacuum gap between the electromagnetic shielding coating and the heat insulating material layer is formed as a vacuum insulation intermediate layer.

2. The induction coil device suitable for the magnetic particle uniform heating smoking set according to claim 1, characterized in that the induction coil is provided at both ends with end conductive contacts extending from the outer housing.

3. The induction coil device suitable for the magnetic particle uniform heating smoking set according to claim 2, characterized in that the middle section of the induction coil is provided with at least one middle section conductive contact extending from the outer housing.

4. The induction coil device suitable for the magnetic particle uniform heating smoking set of claim 1, characterized in that the material of the outer housing is any one of a metallic electromagnetic shielding material, a surface conductive electromagnetic shielding material, or a filled composite type electromagnetic shielding material.

5. The induction coil device suitable for the magnetic particle uniform heating smoking set according to claim 1, characterized in that the material of the inner housing is an insulating material.

6. 2. The induction coil device suitable for a magnetic particle uniform heating smoking set as claimed in claim 1, wherein the electromagnetic shielding coating is formed by applying a conductive coating to the inner side wall of the outer housing.

7. The induction coil device suitable for the magnetic particle uniform heating smoking set described in claim 1, characterized in that the insulating heat-retaining material layer is composed of a matrix formed by mixing one or more of glass fiber, aerogel, foam, and fiber cloth, and an electroplating layer formed by electroplating a metal or conductive material on the surface of the matrix.

8. A method for manufacturing an induction coil device suitable for a magnetic particle uniform heating smoking set, the induction coil device being the induction coil device described in claim 1, the method for manufacturing the induction coil device being as follows: Step 1: producing an insulating and heat-retaining sheet using an insulating and heat-retaining material, wrapping the insulating and heat-retaining sheet around the outside of an induction coil and sealing it to form a ring-shaped insulating and heat-retaining material layer; Step 2: grinding the insulating material into a powder, adding an adhesive and an aqueous additive, and mixing and stirring to prepare an insulating slurry, and injecting the insulating slurry into a mold for the inner housing and sintering it at high temperature to manufacture the inner housing; 3. manufacturing the outer housing using an electromagnetic shielding material so that the outer housing has an electromagnetic shielding function; Step 4: applying an electromagnetic shielding material to an inner sidewall of the outer housing to form the electromagnetic shielding coating; and a step 3 of mounting the induction coil on the outside of the inner housing, mounting the outer housing on the outside of the heat insulating layer, and preventing the electromagnetic shielding coating on the inside of the outer housing from contacting the heat insulating layer; and a step 4 of sealing the upper and lower ends of the inner housing and the outer housing together, and evacuating the annular cavity between the inner housing and the outer housing to form a vacuum intermediate layer between the two-layer housing of the inner housing and the outer housing.

9. The manufacturing method of the induction coil device suitable for the magnetic particle uniform heating smoking set of claim 8, characterized in that: end conductive contacts are provided at both ends of the induction coil, and at least one middle stage conductive contact is provided in the middle stage of the induction coil, and the end conductive contacts and the middle stage conductive contacts are respectively pulled out from pull-out holes pre-installed in the outer housing, and the gaps between the pull-out holes of the outer housing and the corresponding conductive contacts are insulated and sealed.

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