A heating device for electronic cigarette

Abstract

The present invention discloses a heating device for an electronic cigarette, comprising a substrate, a conductive unit, a first heating unit and a second heating unit, wherein the conductive unit, the first heating unit and the second heating unit are arranged in the substrate; the substrate comprises a first base section and a second base section, wherein the first heating unit and the second heating unit are respectively located at the first base section and the second base section; the first heating unit and the second heating unit are respectively electrically connected to the power supply via the conductive unit, so that the first heating unit and the second heating unit heat the first base section and the second base section respectively. The first heating unit and the second heating unit are arranged in the substrate, and the surface of the substrate is smooth and easy to clean; the first heating unit and the second heating unit heat the first base section and the second base section respectively, thereby realizing segmented heating of the tobacco product, which can extend the inhalation time.

Description

Technical Field

[0001] The present invention relates to the field of electronic cigarettes, and in particular to a heating device for electronic cigarettes. Background Art

[0002] When cigarettes burn, they produce harmful gases such as carbon monoxide. With the development of technology, heat-not-burn electronic cigarettes have emerged, which use a baking method to make tobacco products emit smoke for people to inhale.

[0003] At present, the heating wire (or printed circuit) of the heating needle (or heating sheet) is fixed on the surface of the heating needle. On the one hand, the surface of the heating needle is not smooth after being wrapped with the heating wire, and the tobacco oil of the tobacco products is easy to remain on the heating needle, which is difficult to clean; on the other hand, the heating wire is fixed on the surface of the heating needle, and the heating wire is easy to shift due to friction with the tobacco products, causing a short circuit, so that the entire electronic cigarette cannot be used normally.

[0004] The current heating needle cannot achieve segmented heating, and the entire heating needle is inserted into the tobacco product to heat the entire tobacco product at the same time. The entire tobacco product can only be puffed for a dozen puffs, and the entire puffing time is very short, which cannot meet consumers' demand for smoking time. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention provides a heating device for an electronic cigarette, wherein a first heating unit and a second heating unit are arranged in a base body, and the surface of the base body is smooth and easy to clean; the first heating unit and the second heating unit heat the first base segment and the second base segment respectively, thereby realizing segmented heating of the tobacco product, which can extend the smoking time.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A heating device for an electronic cigarette, used for heating tobacco products after being connected to a power source, characterized in that it comprises a substrate, a conductive unit, a first heating unit and a second heating unit, wherein the conductive unit, the first heating unit and the second heating unit are arranged in the substrate; the substrate comprises a first base segment and a second base segment, and the first heating unit and the second heating unit are respectively located at the first base segment and the second base segment; the first heating unit and the second heating unit are respectively electrically connected to the power source via the conductive unit, so that the first heating unit and the second heating unit heat the first base segment and the second base segment respectively.

[0008] The first heating unit and the second heating unit are arranged in the base body, the surface of the base body is smooth and easy to clean; the first heating unit and the second heating unit heat the first base segment and the second base segment respectively, thereby realizing segmented heating of the tobacco product, which can prolong the smoking time.

[0009] Furthermore, an insulating unit is included to insulate the conductive unit from the first heating unit and the conductive unit from the second heating unit to avoid a short circuit between the conductive unit, the first heating unit and the second heating unit.

[0010] Furthermore, the insulating unit is made of aluminum oxide, black nano-composite ceramic coating or oxidized aluminum foil.

[0011] Alumina, black nano-composite ceramic coating and oxidized aluminum foil are insulated, high temperature resistant and have good thermal conductivity. The black nano-composite ceramic coating can fill the gap between the first heating unit and the second heating unit and the substrate, and the heat of the first heating unit and the second heating unit can be better transferred to the substrate.

[0012] Furthermore, the substrate and / or the conductive unit are made of aluminum, aluminum alloy or stainless steel; and / or the first heating unit and the second heating unit are made of nickel, nickel-iron alloy, titanium alloy or stainless steel.

[0013] The substrate and / or the conductive unit are made of aluminum, and the substrate and / or the conductive unit are subjected to anodizing treatment, so that an aluminum oxide insulating unit can be formed on the surface of the substrate and / or the conductive unit. The substrate and / or the conductive unit are made of stainless steel, which has high strength and is non-toxic. The first heating unit and the second heating unit are made of nickel, nickel-iron alloy, titanium alloy or stainless steel. When the temperature changes, the resistance of nickel, nickel-iron alloy, titanium alloy or stainless steel changes greatly, which is conducive to detecting the temperature by detecting the change of current.

[0014] Furthermore, the length of the substrate is 40-70 mm, and the outer diameter of the substrate is 1-3 mm.

[0015] The length of current cigarettes is generally 70, 84, 85, 90, 95, 100 and 120 mm. Excluding the filter, the length of the cigarette is generally 50-100 mm, and the length of the base is 40-70 mm. When heating the tobacco product, the filter will not be burned due to the base being too long. The outer diameter of the base is 1-3 mm, which can ensure the rigidity of the base while being easy to insert into the tobacco product, and will not be damaged when inserted into the tobacco product.

[0016] Furthermore, it also includes a low-temperature unit, which is arranged between the first heating unit and the second heating unit; the base also includes a third base segment, which is arranged between the first base segment and the second base segment, and the low-temperature unit is located at the third base segment to reduce the heat exchange between the first base segment and the second base segment.

[0017] If the first heating unit and the second heating unit are directly connected, even when the first heating unit is not working, the heat of the first heating unit will be quickly transferred to the second heating unit, and the second heating unit transfers the heat to the second base segment, and the second base segment transfers the heat to the cigarette at the second base segment, so the effect of segmented heating of the cigarette is not good. A low-temperature unit is provided between the first heating unit and the second heating unit. When the first heating unit and the second heating unit perform heat exchange, the heat must first pass through the low-temperature unit, which reduces the heat exchange between the first heating unit and the second heating unit. A third base segment is provided between the first base segment and the second base segment, and the heat exchange between the first base segment and the second base segment must pass through the third base segment, which also reduces the heat exchange between the first base segment and the second base segment, thereby better realizing the segmented heating of the tobacco products.

[0018] Furthermore, the conductive unit includes a first conductor and a second conductor, the first conductor and the second conductor are insulated from each other, the two ends of the first heating unit are electrically connected to the first conductor and the second conductor respectively; the two ends of the second heating unit are electrically connected to the second conductor and a power supply respectively.

[0019] Furthermore, the first heating unit and the second heating unit are wound around the first conductor and the second conductor, and the first conductor and the second conductor are in contact with each other.

[0020] The first conductor and the second conductor fit together, so that the space occupied by the first conductor and the second conductor is smaller, and the outer diameter of the substrate can be made smaller, making it easier to penetrate into the tobacco product.

[0021] Furthermore, the first conductor is electrically connected to the first heating unit via the substrate, and / or the first heating unit and the second heating unit are wound around the second conductor.

[0022] The first heating unit is connected to the power source by means of a substrate, and there is only one conductor inside the substrate, so that the outer diameter of the substrate can be made smaller and it is easier to insert into the tobacco product.

[0023] Furthermore, the base includes a main body and an insertion portion, the insertion portion includes a first end close to the main body, and a second end away from the main body, and the cross-section of the insertion portion gradually decreases from the first end to the second end; the insertion portion is fixedly connected to the first heating unit and then inserted into the main body, or the base has a reserved hole, and one end of the first heating unit connected to the base is inserted into the reserved hole and welded and fixed.

[0024] The cross-section of the insertion portion gradually decreases from the first end to the second end, so that the substrate is easier to insert into the smoking article.

[0025] In summary, the beneficial effects of the present invention are:

[0026] 1. The first heating unit and the second heating unit are arranged in the base body, and the surface of the base body is smooth and easy to clean; the first heating unit and the second heating unit heat the first base segment and the second base segment respectively, thereby realizing segmented heating of the tobacco product, which can prolong the smoking time;

[0027] 2. The low temperature unit can reduce the heat exchange between the first heating unit and the second heating unit, thereby reducing the heat exchange between the first base segment and the second base segment, and better achieve segmented heating of the tobacco product;

[0028] 3. The first heating unit is connected to the power source by means of a substrate, and there may be only one conductor inside the substrate, so that the outer diameter of the substrate can be made smaller, making it easier to insert into the tobacco product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG1 is an embodiment of a heating device;

[0030] Figure 2 FIG. 2 is an embodiment of a heating device. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0032] 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.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] like Figure 1-2, a heating device for an electronic cigarette, used for heating tobacco products after being connected to a power source, comprising a substrate 1, a conductive unit 2, a first heating unit 3 and a second heating unit 4, wherein the conductive unit 2, the first heating unit 3 and the second heating unit 4 are arranged in the substrate 1; the substrate 1 comprises a first base section 101 and a second base section 102, wherein the first heating unit 3 and the second heating unit 4 are respectively located at the first base section 101 and the second base section 102; the first heating unit 3 and the second heating unit 4 are respectively electrically connected to the power source via the conductive unit 2, so that the first heating unit 3 and the second heating unit 4 heat the first base section 101 and the second base section 102 respectively. The first heating unit 3 and the second heating unit 4 are arranged in the substrate 1, and the surface of the substrate 1 is smooth and easy to clean; the first heating unit 3 and the second heating unit 4 heat the first base section 101 and the second base section 102 respectively, thereby realizing segmented heating of tobacco products, which can extend the smoking time.

[0035] The substrate 1 includes a body 104 and an insertion portion 105. The insertion portion 105 includes a first end 1051 close to the body 104 and a second end 1052 away from the body 104. The cross section of the insertion portion 105 gradually decreases from the first end 1051 to the second end 1052, so that the substrate 1 is easier to insert into the tobacco product. The length of the substrate 1 is 40-70 mm, and the outer diameter of the body 104 is 1-3 mm. The length of current cigarettes is generally 70, 84, 85, 90, 95, 100 and 120 mm. Excluding the filter tip, the length of the cigarette is generally 50-100 mm. The length of the substrate 1 is 40-70 mm. When heating the tobacco product, the filter tip will not be burned because the substrate 1 is too long. The outer diameter of the body 104 is 1-3 mm. While being easy to insert into the tobacco product, the rigidity of the substrate 1 can also be ensured, and it will not be damaged when inserted into the tobacco product.

[0036] The substrate 1 and / or the conductive unit 2 are made of aluminum, aluminum alloy or stainless steel; and / or the first heating unit 3 and the second heating unit 4 are made of nickel, nickel-iron alloy, titanium alloy or stainless steel. The substrate 1 and / or the conductive unit 2 are made of aluminum, and the substrate 1 and / or the conductive unit 2 are anodized to form an aluminum oxide insulating unit on the surface of the substrate 1 and / or the conductive unit 2. The substrate 1 and / or the conductive unit 2 are made of stainless steel, which has high strength and is non-toxic. The first heating unit 3 and the second heating unit 4 are made of nickel, nickel-iron alloy, titanium alloy or stainless steel (preferably pure nickel ni200). When the temperature of nickel, nickel-iron alloy, titanium alloy or stainless steel changes, the resistance changes greatly, which is conducive to detecting the temperature by detecting the change of current.

[0037] The conductive unit 2 includes a first conductive body 201 and a second conductive body 202. The first conductive body 201 and the second conductive body 202 are connected to the first heating unit 3 and the second heating unit 4 in at least the following ways:

[0038] Example 1 (such as Figure 1 ): The first heating unit 3 and the second heating unit 4 are wound around the first conductor 201 and the second conductor 202 after bonding. The first heating unit 3 and the second heating unit 4 can be different sections of the same heating unit, or can be two separate heating units. The two ends of the first heating unit 3 are electrically connected to the first conductor 201 and the second conductor 202 respectively; the end of the second heating unit 4 close to the first heating unit 3 is electrically connected to the second conductor 202. The first heating unit 3 and the second heating unit 4 are connected to the power supply in parallel, so that the first heating unit 3 and the second heating unit 4 can work separately, thereby realizing segmented heating of the tobacco product. The first heating unit 3 and the second heating unit 4 are connected to the power supply by the first conductor 201 and the second conductor 202, which is simple to process and manufacture and has a high yield rate.

[0039] Example 2 (such as Figure 2 ): The first heating unit 3 and the second heating unit 4 are wound around the second conductor 202, and one end of the first heating unit 3 is electrically connected to the substrate 1. The first heating unit 3 and the substrate 1 can be connected in the following ways: the first heating unit 3 is fixed (can be welded) to the insertion part 105, and then the insertion part 105 is inserted into the main body; or a reserved hole is provided at the top of the insertion part 105, when the first heating unit 3 is placed in the substrate 1, one end of the first heating unit 3 extends out of the reserved hole, and then the first heating unit 3 is fixed to the substrate 1 by welding, and the reserved hole is blocked during welding to prevent smoke oil and the like from flowing into the inside of the substrate 1 and polluting the inside of the substrate 1. The substrate 1 is electrically conductive with the first conductor 201, and the other end of the first heating unit 3 is electrically connected to the second conductor 202. One end of the second heating unit 4 close to the first heating unit 3 is electrically connected to the second conductor 202. The first heating unit 3 is connected to the power source by means of the substrate 1. There may be only one conductor inside the substrate 1. Thus, the outer diameter of the substrate 1 can be made smaller, making it easier to insert into the tobacco product.

[0040] The heating device also includes a low-temperature unit 5, which is arranged between the first heating unit 3 and the second heating unit 4; the base 1 also includes a third base segment 103, which is arranged between the first base segment 101 and the second base segment 102, and the low-temperature unit 5 is located at the third base segment 103 to reduce the heat exchange between the first base segment 101 and the second base segment 102; the first heating unit 3, the second heating unit 4 and the low-temperature unit 5 are integrally formed or separately formed. If the first heating unit 3 and the second heating unit 4 are directly connected, even when the first heating unit 3 is not working, the heat of the first heating unit 3 will be quickly transferred to the second heating unit 4, and the second heating unit 4 will transfer the heat to the second base segment 102. The second base segment 102 transfers the heat to the cigarette at the second base segment 102, so the effect of segmented heating of the cigarette is not good. A low-temperature unit 5 is provided between the first heating unit 3 and the second heating unit 4. When the first heating unit 3 and the second heating unit 4 perform heat exchange, the heat must first pass through the low-temperature unit 5, which reduces the heat exchange between the first heating unit 3 and the second heating unit 4. A third base segment 103 is provided between the first base segment 101 and the second base segment 102. The heat exchange between the first base segment 101 and the second base segment 102 must pass through the third base segment 103, which also reduces the heat exchange between the first base segment 101 and the second base segment 102, thereby better realizing the segmented heating of the tobacco products.

[0041] The heating device further includes an insulating unit (not shown in the figure). In Example 2, the insulating unit may be wrapped around only the first heating unit 3 and the second heating unit 4, because the second conductor 202 is wrapped around the first heating unit 3 and the second heating unit 4, and the second conductor 202 will not contact the substrate 1, thereby causing a short circuit. Of course, the conductive unit 2, the first heating unit 3, the second heating unit 4 and the substrate 1 may all be provided with insulating units to avoid a short circuit between the conductive unit 2, the first heating unit 3, the second heating unit 4 and the substrate 1.

[0042] Three types of insulation units are listed here. This is just a list, and the insulation units are not limited to these three types.

[0043] The first insulating unit: When the insulating unit is made of aluminum oxide, if the conductive unit 2 and the substrate 1 are made of aluminum or aluminum alloy, an anodic oxidation treatment can be used to form an aluminum oxide insulating unit layer on the surface of the conductive unit 2 and the substrate 1. If the conductive unit 2 and the substrate 1 are not made of aluminum or aluminum alloy, aluminum can be plated on the surface of the conductive unit 2 and the inner surface of the substrate 1, and then an anodic oxidation treatment can be performed to form an aluminum oxide insulating layer, or aluminum oxide can be directly plated.

[0044] The second insulating unit: When the insulating unit is made of black nano-composite ceramic coating, the second conductor 202 is first coated with black nano-composite ceramic coating and dried (if it is Example 1, the first conductor 201 is also coated with black nano-composite ceramic coating and dried), and then the first heating unit 3 and the second heating unit 4 are wound on the second conductor 202 (if it is Example 1, the first heating unit 3 and the second heating unit 4 are also wound on the first conductor 201), and then the first heating unit 3, the second heating unit 4 and the low-temperature unit 5 are coated with black nano-composite ceramic coating and dried, and then the first heating unit 3 and the second heating unit 4 are placed in the substrate 1, and then the black nano-composite ceramic coating is injected into the substrate 1 to remove the air in the substrate 1 and fill the gap between the substrate 1 and the first heating unit 3 and the second heating unit 4. The thermal conductivity of the black nano-composite ceramic coating is stronger than that of air, so that the heat of the first heating unit 3 and the second heating unit 4 can be better conducted to the substrate 1, and the heat utilization rate of the first heating unit 3 and the second heating unit 4 is higher. Then dry it. If the first heating unit 3 needs welding, fix it by welding. If not, do not weld it.

[0045] The third insulating unit: When the insulating unit is made of oxidized aluminum foil, the aluminum foil is first cut into a required size, and then oxidized to avoid oxidation before cutting, and the cut edge is not oxidized and conductive. Then the oxidized aluminum foil is wrapped around the conductive unit 2, the first heating unit 3 and the second heating unit 4.

[0046] Alumina, black nanocomposite ceramic coating and oxidized aluminum foil are insulated, high temperature resistant and have good thermal conductivity.

[0047] Working principle of the heating device: Example 1: The first conductor is connected to the positive pole of the power supply (it can also be connected to the negative pole of the power supply, here we take the positive pole of the power supply as an example), the second conductor is connected to the negative pole of the power supply, and the end of the second heating unit away from the first heating unit is connected to the positive pole of the power supply. Figure 1 In the embodiment, the second conductor is connected to the first heating unit and the second heating unit through the low temperature unit to form a first loop; the second conductor and the second heating unit form a second loop. The first loop and the second loop are connected in parallel and can be controlled separately, so as to realize segmented heating of the substrate, and thus segmented heating of the tobacco product.

[0048] Embodiment 2: The first conductor is connected to the positive pole of the power supply (it can also be connected to the negative pole of the power supply, here we take the positive pole of the power supply as an example), the second conductor is connected to the negative pole of the power supply, and the end of the second heating unit away from the first heating unit is connected to the positive pole of the power supply. Figure 2In the embodiment, the second conductor is connected to the first heating unit and the second heating unit through the low temperature unit to form a first loop; the second conductor and the second heating unit form a second loop. The first loop and the second loop are connected in parallel and can be controlled separately, so as to realize segmented heating of the substrate, and thus segmented heating of the tobacco product.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating device for an electronic cigarette, used to heat a tobacco product after being connected to a power source, characterized in that: The invention comprises a substrate, a conductive unit, a first heating unit and a second heating unit, wherein the conductive unit, the first heating unit and the second heating unit are arranged in the substrate; the substrate comprises a first base section and a second base section, wherein the first heating unit and the second heating unit are respectively located at the first base section and the second base section; the first heating unit and the second heating unit are respectively electrically connected to the power source via the conductive unit, so that the first heating unit and the second heating unit heat the first base section and the second base section respectively; The conductive unit includes a first conductor and a second conductor, the first conductor and the second conductor are insulated from each other, two ends of the first heating unit are electrically connected to the first conductor and the second conductor respectively; two ends of the second heating unit are electrically connected to the second conductor and a power source respectively; the first conductor, the first heating unit and the second conductor form a first loop, the second conductor and the second heating unit form a second loop, the first loop and the second loop are connected in parallel and can be controlled separately, so as to achieve segmented heating of the substrate; The first heating unit and the second heating unit are wound around the first conductor and the second conductor, and the first conductor and the second conductor are in contact with each other; or The first conductor is electrically connected to the first heating unit via the substrate, and the first heating unit and the second heating unit are wound around the second conductor; It also includes a low-temperature unit, which is arranged between the first heating unit and the second heating unit; the base also includes a third base segment, which is arranged between the first base segment and the second base segment, and the low-temperature unit is located at the third base segment to reduce heat exchange between the first base segment and the second base segment.

2. The heating device of an electronic cigarette according to claim 1, characterized in that: An insulating unit is also included to insulate the conductive unit from the first heating unit and the conductive unit from the second heating unit, so as to avoid a short circuit between the conductive unit, the first heating unit and the second heating unit.

3. The heating device of an electronic cigarette according to claim 2, characterized in that: The insulating unit is made of aluminum oxide, black nano-composite ceramic paint or oxidized aluminum foil.

4. The heating device of an electronic cigarette according to claim 3, characterized in that: The substrate and / or the conductive unit are made of aluminum, aluminum alloy or stainless steel; and / or the first heating unit and the second heating unit are made of nickel, nickel-iron alloy, titanium alloy or stainless steel.

5. The heating device for an electronic cigarette according to claim 4, characterized in that: The length of the substrate is 40-70 mm, and the outer diameter of the substrate is 1-3 mm.

6. The heating device for an electronic cigarette according to claim 1, characterized in that: The base comprises a main body and an inserting portion, the inserting portion comprises a first end close to the main body and a second end away from the main body, and a cross section of the inserting portion gradually decreases from the first end to the second end; The inserting portion is fixedly connected to the first heating unit and then inserted into the main body; Or the base is provided with a reserved hole, and one end of the first heating unit connected to the base is inserted into the reserved hole and fixed by welding.

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