Electric heating device

Abstract

The invention relates to the technical field of electric heating, in particular to an electric heating device. An electric heating device is used for heating a cigarette, the cigarette is provided with a fuming section, a hollow section and a filtering section which are sequentially arranged in the circumferential direction, the electric heating device comprises a shell, a heating assembly and a heat transmission unit, and a heating cavity is defined by the shell; the heating assembly is arranged in the heating cavity; the heat transmission unit is arranged in the shell; wherein the heat transmission unit comprises an auxiliary cooling unit, a heat conduction part and an auxiliary heating unit, the auxiliary cooling unit is used for being arranged corresponding to the hollow section, and the auxiliary heating unit is used for being arranged corresponding to the smoke generation section; the auxiliary cooling unit and the auxiliary heating unit are connected through the heat conduction part so that heat absorbed by the auxiliary cooling part can be transmitted to the auxiliary heating part through the heat conduction part. Heat exchange can be conducted between the auxiliary cooling unit and the auxiliary heating unit through the heat conduction part, and the heating uniformity of the smoke forming material and the energy utilization rate of the appliance are improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric heating, and particularly to an electric heating device. Background Art

[0002] In today's society, smoking behavior is not only related to personal living habits, but also closely linked to multiple fields such as health and technology. The emergence of heated smoking appliances has solved some drawbacks of traditional combustion cigarettes, such as the generation of harmful substances like tar. These appliances heat the tobacco rod's tobacco-releasing section to volatilize the tobacco material and produce inhalable smoke. Compared with combustion cigarettes, theoretically, they can reduce some harmful components.

[0003] However, there are still many limitations in the prior art in this regard. Existing heated cigarette technologies usually heat the tobacco-releasing section of the tobacco rod through specific heating elements, causing the tobacco material to release smoke for consumers to inhale. Due to uneven heating, some areas are overheated while others are underheated. This uneven heating leads to inconsistent release effects of the tobacco material, resulting in fluctuations in aspects such as the taste and aroma of the smoke during the inhalation process, affecting the user experience of smokers. In addition, the existing thermal management system lacks effective utilization of the waste heat of high-temperature smoke. During the process of generating smoke in heated cigarettes, a large amount of heat is lost as the smoke dissipates and is not effectively recovered and reused, which further reduces the energy utilization efficiency of the entire appliance. Summary of the Invention

[0004] Based on this, it is necessary to provide an electric heating device that can uniformly heat the tobacco material and improve energy utilization efficiency.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] An electric heating device for heating a tobacco rod, the tobacco rod having a tobacco-releasing section, a hollow section, and a filter section arranged axially in sequence, the electric heating device comprising:

[0007] A housing that encloses to form a heating chamber, and the tobacco-releasing section is for insertion into the heating chamber;

[0008] A heating assembly disposed in the heating chamber for heating the tobacco-releasing section;

[0009] A heat transfer unit disposed in the housing;

[0010] Among them, the heat transfer unit includes an auxiliary cooling unit, a heat conduction part, and an auxiliary heating unit. The auxiliary cooling unit is configured to be correspondingly arranged with the hollow section, the auxiliary heating unit is configured to be correspondingly arranged with the smoking section, and the heat conduction part connects the auxiliary cooling unit and the auxiliary heating unit so that the heat absorbed by the auxiliary cooling unit is conducted to the auxiliary heating unit through the heat conduction part.

[0011] It can be understood that heat transfer is carried out by using the heat transfer unit. The auxiliary cooling unit absorbs the heat of the smoke and transfers the heat to the auxiliary heating unit through the heat conduction part. The auxiliary heating unit uses the transferred heat to assist in heating the smoking section of the cigarette. On the one hand, the auxiliary cooling unit absorbs the heat of the smoke in the hollow section, reducing the temperature of the smoke and improving the user experience; on the other hand, the waste heat of the smoke absorbed by the auxiliary cooling unit is conducted to the auxiliary heating unit, and the waste heat of the smoke is used to assist in heating the smoking section, improving the heat uniformity of the smoking material and the energy utilization rate of the device.

[0012] In one embodiment, both the auxiliary cooling unit and the auxiliary heating unit are composed of semiconductor thermoelectric elements based on the Peltier effect. Among them, the auxiliary cooling unit has a first cold end and a first hot end, the auxiliary heating unit has a second cold end and a second hot end, the first cold end is configured to be correspondingly arranged with the hollow section, the second hot end is configured to be correspondingly arranged with the smoking section, and the heat conduction part is respectively connected to the first hot end and the second cold end.

[0013] In one embodiment, the auxiliary cooling unit includes a plurality of semiconductor thermoelectric elements connected in series; and

[0014] The auxiliary heating unit has a plurality of semiconductor thermoelectric elements connected in series.

[0015] In one embodiment, the number of the auxiliary cooling units is 2 to 10; the number of the auxiliary heating units is 4 to 20.

[0016] In one embodiment, the semiconductor thermoelectric element is composed of an insulating heat conductor, a conductor, a P-type semiconductor, and an N-type semiconductor;

[0017] Among them, the insulating heat conductor is configured as a material with electrical insulation and high thermal conductivity. The N-type semiconductor is a semiconductor mainly conducting electricity by electrons, and the P-type semiconductor is a semiconductor mainly conducting electricity by holes.

[0018] In one embodiment, when the cigarette is inserted into the heating chamber, the first cold end of the auxiliary cooling unit is flush with the hollow section.

[0019] In one embodiment, when the cigarette is inserted into the heating chamber, the second heat end of the auxiliary heating unit is flush with the smoking section.

[0020] In one embodiment, the electric heating device further includes a vacuum layer and a heat insulation layer. The vacuum layer is disposed outside the heating chamber, and the heat insulation layer is disposed inside the housing.

[0021] In one embodiment, the electric heating device further includes a battery and a charging port. The battery is connected to the charging port and can be used to charge the battery. The battery is respectively connected to the heat transfer unit and the heating component to provide electrical energy.

[0022] In one embodiment, the electric heating device further includes a power button and a chip. The power button receives input instructions. The power button is connected to the chip, and the chip is connected to the battery. The chip obtains input instructions through the power button and converts and controls the working mode of the heat transfer unit and the heating temperature of the heating component.

[0023] Compared with the prior art, the electric heating device uses a heat transfer unit to transfer heat. The auxiliary cooling unit absorbs the heat of the smoke and transfers the heat to the auxiliary heating unit through the heat conduction part. The auxiliary heating unit uses the transferred heat to assist in heating the smoking section of the cigarette. On the one hand, the auxiliary cooling unit cools the smoke in the hollow section to reduce the temperature of the smoke and improve the user experience; on the other hand, the waste heat of the smoke is conducted to the auxiliary heating unit, and the waste heat of the smoke is used to assist in heating the smoking section, improving the heat uniformity of the smoking material and the energy utilization rate of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 FIG. is a schematic structural diagram of the electric heating device without a cigarette inserted provided by the present application.

[0026] Figure 2 FIG. is a schematic structural diagram of the electric heating device with a cigarette inserted provided by the present application.

[0027] Figure 3 FIG. is a schematic structural diagram of the auxiliary cooling unit and the auxiliary heating unit provided by the present application.

[0028] Figure 4It is a schematic structural diagram of the heat transfer unit provided by this application.

[0029] Figure 5 It is a schematic diagram of the working principle of the heat transfer unit provided by this application.

[0030] Figure 6 It is a schematic structural diagram of the semiconductor thermoelectric element provided by this application.

[0031] Figure 7 It is a schematic structural diagram of the cigarette provided by this application.

[0032] Figure 8 It is a schematic structural diagram of the cigarette and the heat transfer unit provided by this application.

[0033] The reference numerals of each component are as follows:

[0034] 100, electric heating device; 10, housing; 11, heating chamber; 12, air inlet; 20, heating assembly; 30, heat transfer unit; 31, auxiliary cooling unit; 311, first cold end; 312, first hot end; 32, heat conduction part; 33, auxiliary heating unit; 331, second cold end; 332, second hot end; 34, semiconductor thermoelectric element; 341, insulating heat conductor; 342, conductor; 343, P-type semiconductor; 344, N-type semiconductor; 40, vacuum layer; 50, heat insulation layer; 60, battery; 70, charging port; 80, power button; 90, chip;

[0035] 200, cigarette; 210, smoking section; 220, hollow section; 230, filter section. Detailed implementation manners

[0036] To make the above objects, features, and advantages of this application more obvious and understandable, the following will describe the detailed implementation manners of this application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation manner.

[0038] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature or in indirect contact with the second feature through an intermediate medium when the first feature is "on" or "under" the second feature. Moreover, when the first feature is "above", "over" or "on top of" the second feature, the first feature may be directly above or obliquely above the second feature, or merely indicate that the first feature has a higher horizontal height than the second feature. When the first feature is "below", "beneath" or "underneath" the second feature, the first feature may be directly below or obliquely below the second feature, or merely indicate that the first feature has a lower horizontal height than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0041] Please refer to Figures 1 to 8 , this application provides an electric heating device 100 for heating a cigarette 200. The cigarette 200 has a smoking section 210, a hollow section 220 and a filter section 230 arranged in sequence along the axial direction. The electric heating device includes: a housing 10, a heating component 20 and a heat transfer unit 30. The housing 10 encloses to form a heating chamber 11, and the smoking section 210 is for inserting into the heating chamber 11; the heating component 20 is arranged in the heating chamber 11 for heating the smoking section 210; the heat transfer unit 30 is arranged in the housing 10; wherein, the heat transfer unit 30 includes an auxiliary cooling unit 31, a heat conducting part 32 and an auxiliary heating unit 33. The auxiliary cooling unit 31 is arranged corresponding to the hollow section 220, the auxiliary heating unit 33 is arranged corresponding to the smoking section 210, and the heat conducting part 32 connects the auxiliary cooling unit 31 and the auxiliary heating unit 33 so that the heat absorbed by the auxiliary cooling unit is conducted to the auxiliary heating unit through the heat conducting part 32. Among them, the heat conducting part 32 is configured with a material having electrical insulation and high thermal conductivity.

[0042] As described above, heat is transferred using the heat transfer unit 30. The auxiliary cooling unit 31 absorbs the heat of the flue gas and transfers the heat to the auxiliary heating unit 33 through the heat conduction part 32. The auxiliary heating unit 33 uses the transferred heat to assist in heating the smoking section 210 of the cigarette stick 200. On the one hand, the auxiliary cooling unit 31 cools the flue gas in the hollow section 220 to lower the temperature of the flue gas and improve the user experience. On the other hand, the waste heat of the flue gas is conducted to the auxiliary heating unit 33, and the waste heat of the flue gas is used to assist in heating the smoking section 210, improving the heat uniformity of the smoking material and the energy utilization rate of the device.

[0043] Here, the heating component 20 is composed of ceramics, electric heating wires or printed circuits, and its external structure can be in the shape of needles, rods or sheets, etc.

[0044] As Figure 1 and Figure 2 shown, an air inlet 12 is formed on the housing 10, and the air inlet 12 is communicated with the bottom of the heating chamber 11. Air flows into the cigarette stick 200 in the heating chamber 11 through the air inlet 12.

[0045] As Figure 8 shown, in one embodiment, when the cigarette stick 200 is inserted into the heating chamber 11, the position of the auxiliary cooling unit 31 is flush with the hollow section 220, and cools the flue gas in the hollow section 220. When the cigarette stick 200 is inserted into the heating chamber 11, the position of the auxiliary heating unit 33 is flush with the smoking section 210, and assists in heating the smoking material.

[0046] In this embodiment, the auxiliary cooling unit 31 is arranged at one end far from the power supply, and the auxiliary heating unit 33 is arranged at one end close to the power supply.

[0047] As Figures 3 to 5 and Figure 8 shown, both the auxiliary cooling unit 31 and the auxiliary heating unit 33 are composed of semiconductor thermoelectric elements 34 based on the Peltier effect. Among them, the auxiliary cooling unit 31 has a first cold end 311 and a first hot end 312, the auxiliary heating unit 33 has a second cold end 331 and a second hot end 332. The first cold end 311 is used to be correspondingly arranged with the hollow section 220, the second hot end 332 is used to be correspondingly arranged with the smoking section 210, and the heat conduction part 32 is respectively connected to the first hot end 312 and the second cold end 331.

[0048] In this embodiment, the first cold end 311 of the auxiliary cooling unit 31 is close to the heating chamber 11, the first hot end 312 is close to the vacuum layer 40, the second hot end 332 of the auxiliary heating unit 33 is close to the heating chamber 11, the second cold end 331 is close to the vacuum layer 40, and the first hot end 312 of the auxiliary cooling unit 31 is connected to the second cold end 331 of the auxiliary heating unit 33 through the heat conduction part 32.

[0049] As shown in Figure 5 Figure [not provided], the working principle of the heat transfer unit 30 is as follows: The first cold end 311 of the auxiliary cooling unit 31 absorbs heat from the flue gas in the hollow section 220 of the cigarette rod 200, cools down the flue gas in the hollow section 220 of the cigarette rod 200. The first cold end 311 of the auxiliary cooling unit 31 transfers the absorbed flue gas heat to the first hot end 312 of the auxiliary cooling unit 31 through the semiconductor thermoelectric element 34. The first hot end 312 of the auxiliary cooling unit 31 transfers the flue gas heat to the second cold end 331 of the auxiliary heating unit 33 of the heat transfer unit 30 through heat conduction by the heat conduction part 32. The second cold end 331 of the auxiliary heating unit 33 transfers the flue gas heat to the second hot end 332 of the auxiliary heating unit 33 through the semiconductor thermoelectric element 34. The second hot end 332 of the auxiliary heating unit 33 assists in heating the smoking material in the smoking section 210 of the cigarette rod 200.

[0050] In one embodiment, the auxiliary cooling unit 31 includes a plurality of semiconductor thermoelectric elements 34 connected in series; and the auxiliary heating unit 33 has a plurality of semiconductor thermoelectric elements 34 connected in series. It can be understood that in other embodiments, the auxiliary cooling unit 31 and the auxiliary heating unit 33 can also be composed of a plurality of semiconductor thermoelectric elements 34 connected in parallel.

[0051] In one embodiment, the number of the auxiliary cooling units 31 is 2 to 10, for example: 4, 6, 8, etc.; the number of the auxiliary heating units 33 is 4 to 20, for example: 2, 4, 6, etc.

[0052] As shown in Figure 6 Figure [not provided], the semiconductor thermoelectric element 34 is composed of an insulating heat conductor 341, a conductor 342, a P-type semiconductor 343, and an N-type semiconductor 344; wherein, the insulating heat conductor 341 is configured with a material having electrical insulation and high thermal conductivity, for example: ceramics, glass. The N-type semiconductor 344 is a semiconductor mainly conducting electricity by electrons, for example: silicon semiconductor containing pentavalent element arsenic, etc. The P-type semiconductor 343 is a semiconductor mainly conducting electricity by holes, for example: silicon semiconductor containing trivalent element boron, etc.

[0053] The working principle of the semiconductor thermoelectric element 34 is as follows: Connect the N-type semiconductor 344 and the P-type semiconductor 343 into a loop with the conductor 342 and wires, and connect the semiconductor thermoelectric element 34 to the battery 60. The conductor 342 and the wires only play a role in conducting electricity. After the semiconductor thermoelectric element 34 is connected to the current, electron-hole pairs are generated at one end, the internal energy decreases, the temperature drops, and it absorbs heat from the outside, which is called the cold end; at the other end, due to the recombination of electron-hole pairs, the internal energy increases, the temperature rises, and it releases heat to the surroundings, which is called the hot end.

[0054] As shown in Figure 2As shown, the electric heating device further includes a vacuum layer 40 and a heat insulation layer 50. The vacuum layer 40 is disposed outside the heating chamber 11, and the heat insulation layer 50 is disposed inside the housing 10. Here, the heat insulation layer 50 is made of one or more of materials such as aerogel, asbestos, rock wool, and glass fiber felt, and the thickness range of the heat insulation layer 50 is 0.5 - 4 mm. The inside of the vacuum layer 40 is in a vacuum state, and the thickness range of the vacuum layer 40 is 0.5 - 3 mm.

[0055] In one embodiment, the electric heating device further includes a battery 60 and a charging port 70. The battery 60 is connected to the charging port 70 and can be used to charge the battery 60. The battery 60 is respectively connected to the heat transfer unit 30 and the heating component 20 to provide electrical energy.

[0056] Please continue to refer to Figure 2 , the electric heating device further includes a power button 80 and a chip 90. The power button 80 receives input instructions. The power button 80 is connected to the chip 90, and the chip 90 is connected to the battery 60. The chip 90 obtains input instructions through the power button 80 and converts and controls the working mode of the heat transfer unit 30 and the heating temperature of the heating component 20.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0058] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An electric heating device for heating a cigarette (200), wherein the cigarette (200) comprises a smoking section (210), a hollow section (220) and a filtering section (230) arranged in sequence along an axial direction, characterized in that: The electric heating device comprises: A housing (10), the housing (10) enclosing a heating chamber (11), the smoking section (210) being used to be inserted into the heating chamber (11); A heating component (20), the heating component (20) being arranged in the heating chamber (11) and being used for heating the smoking section (210); a heat transfer unit (30), the heat transfer unit (30) being arranged in the housing (10); The heat transfer unit (30) comprises an auxiliary cooling unit (31), a heat conduction part (32) and an auxiliary heating unit (33); the auxiliary cooling unit (31) is used to be arranged corresponding to the hollow section (220); the auxiliary heating unit (33) is used to be arranged corresponding to the smoking section (210); the heat conduction part (32) connects the auxiliary cooling unit (31) and the auxiliary heating unit (33) so that the heat absorbed by the auxiliary cooling unit (31) is transferred to the auxiliary heating unit (33) through the heat conduction part (32).

2. The electric heating device according to claim 1, characterized in that: The auxiliary cooling unit (31) and the auxiliary heating unit (33) are both composed of semiconductor thermoelectric elements (34) based on the Peltier effect, wherein the auxiliary cooling unit (31) has a first cold end (311) and a first hot end (312), and the auxiliary heating unit (33) has a second cold end (331) and a second hot end (332), the first cold end (311) is used to be arranged corresponding to the hollow section (220), and the second hot end (332) is used to be arranged corresponding to the smoking section (210), and the heat conduction part (32) is respectively connected to the first hot end (312) and the second cold end (331).

3. The electric heating device according to claim 2, characterized in that: The auxiliary cooling unit (31) comprises a plurality of semiconductor thermoelectric elements (34) connected in series; and The auxiliary heating unit (33) has a plurality of semiconductor thermoelectric elements (34) connected in series.

4. The electric heating device according to claim 3, characterized in that: The number of the auxiliary cooling units (31) is 2 to 10; the number of the auxiliary heating units (33) is 4 to 20.

5. The electric heating device according to claim 3, characterized in that: The semiconductor thermoelectric element (34) is composed of an insulating heat conductor (341), an electrical conductor (342), a P-type semiconductor (343), and an N-type semiconductor (344); The insulating thermal conductor (341) is configured as a material with electrical insulation and high thermal conductivity, the N-type semiconductor (344) is a semiconductor that mainly conducts electricity through electrons, and the P-type semiconductor (343) is a semiconductor that mainly conducts electricity through holes.

6. The electric heating device according to claim 1, characterized in that: When the cigarette (200) is inserted into the heating chamber (11), the first cold end (311) of the auxiliary cooling unit (31) is flush with the hollow section (220).

7. The electric heating device according to claim 1, characterized in that: When the cigarette (200) is inserted into the heating chamber (11), the second heating end (332) of the auxiliary heating unit (33) is flush with the smoking section (210).

8. The electric heating device according to claim 1, characterized in that: The electric heating device further comprises a vacuum layer (40) and a heat insulation layer (50), wherein the vacuum layer (40) is arranged on the outside of the heating chamber (11), and the heat insulation layer (50) is arranged on the inside of the shell (10).

9. The electric heating device according to claim 1, characterized in that: The electric heating device further comprises a battery (60) and a charging port (70); the battery (60) is connected to the charging port (70) for charging the battery (60); and the battery (60) is respectively connected to the heat transfer unit (30) and the heating component (20) for providing electrical energy.

10. The electric heating device according to claim 9, characterized in that: The electric heating device further comprises a power button (80) and a chip (90), wherein the power button (80) receives input instructions, the power button (80) is connected to the chip (90), and the chip (90) is connected to the battery (60), and the chip (90) obtains the input instructions through the power button (80) and converts and controls the working mode of the heat transfer unit (30) and the heating temperature of the heating component (20).

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