WO2020073730A1 - Air-heating tobacco roasting machine having improved heating performance - Google Patents

Abstract

An air-heating tobacco roasting machine having improved heating performance, comprising a housing (10) and a heating and heat-preservation device (20). The heating and heat-preservation device (20) is installed in an installation chamber (101) of the housing (10). The heating and heat-preservation device (20) comprises a heat insulation cup (21), a tobacco holder, and a heating element (23). The tobacco holder has a tobacco holding main chamber (221) and a thermal contact conduction portion (226), and the heating element (23) is disposed below the thermal contact conduction portion (226). An air convection gap (24) is maintained between an outer side of the tobacco holder and an inner side of the heat insulation cup (21). An airflow radiation heating through-hole (224) is provided at a side wall of the tobacco holding main chamber (221). A first air inlet (102) of the housing (10) communicates with the air convection gap (24). Air passes through the first air inlet (102), the heating element (23), the air convection gap (24), and the airflow radiation heating through-hole (224) to enter the interior of the tobacco holding main chamber (221).

Description

 Air heating flue-curing machine with improved heating performance The  Technical field

 The invention relates to the field of a flue-cured tobacco machine, in particular to an air-heated flue-cured tobacco machine with improved heating performance.

 Background technique

The existing flue-cured tobacco implements are implemented in a single way, either by heating from the outside to the inside, and the heat energy generated by the heating components is directly transferred to the heat-conducting cup, and then transferred to the solid smoke-generating substance, which is heated by roasting heat; or from the inside To the outside, the heating element is directly inserted into the smoking substance, and the generated heat energy is directly transferred to the solid smoking substance to heat it by baking. The above two methods have common defects: the temperature of the inside and outside of the heated substance is not uniform, the heating area is small, and the heating efficiency is low, which affects the user's experience. Among them, in the internal heating method, it is difficult to finish the shredded tobacco, which is easy to cause waste of shredded tobacco.

In addition, the current flue-curing machine generally has the problem of heat loss, resulting in more energy consumption. In addition, the existing heat-conducting cup is fixedly connected with the smoking set, which is inconvenient to disassemble and is not conducive to cleaning the smoke residue after baking.

Therefore, in the patent application of the present invention, the applicant has carefully studied an air heating flue-curing machine with improved heating performance to solve the above problems.

 Summary of the invention

The present invention addresses the shortcomings of the above-mentioned prior art, and the main purpose is to provide an air-heated flue-cured tobacco machine with improved heating performance, which enables the heat generated by the heating element to be transferred through a combination of bottom thermal contact conduction and hot lateral air convection radiation To the smoke body, the heating area of the smoke body and the heating efficiency of the smoke body are improved. The heat is evenly distributed, which improves the user's taste, realizes all-round heating of the smoke body, and the tobacco shreds are completely baked to avoid waste of shredded tobacco.

In order to achieve the above purpose, the present invention adopts the following technical solutions:

An air heating flue-curing machine with improved heating performance includes a casing and a heating and insulation device installed on the casing; the casing has an installation cavity and a first air inlet, and the heating and insulation device is installed in the installation cavity;

The heating and heat preservation device includes a heat-insulating cup, a smoke-holding cup and a heating element provided in the heat-insulating cup; the smoke-holding cup has a main chamber for containing smoke and a contact heat conduction part connected to the bottom of the main chamber for containing smoke, The upper surface of the heat-conducting part is disposed toward the inside of the main chamber for containing smoke; the heating element is arranged below the heat-conducting part; an air convection gap is maintained between the outer side of the cup and the inner side of the heat-insulating cup; The side wall of the main chamber for accommodating smoke is provided with an airflow radiation heating through hole, the first air inlet and the air convection gap penetrate through, and the air enters the volume in sequence through the first air inlet, the heating element, the air convection gap, and the airflow radiation heating through hole Inside the main smoke chamber.

As a preferred solution, the smoke-containing main cavity is connected with the contact heat-conducting part body.

As a preferred solution, a convex portion is convexly formed on the upper surface of the contact heat conduction portion, and a convection cavity is formed above the contact heat conduction portion corresponding to the periphery of the convex portion, and air enters the main chamber for accommodating smoke through the radiation heating through hole Inside the body, it enters the convection cavity downwards, and finally enters the main chamber of the smoke containing cavity upwards. The airflow radiation heating through hole is located on the upper side of the convection cavity.

As a preferred solution, the smoke-holding cup can be placed up and down in the heat-insulating cup, the top end of the smoke-holding cup forms a sealed connection with the heat-insulating cup, and the upper end of the air convection gap is sealed.

As a preferred solution, the extraction cup is connected with an extraction part for facilitating the extraction of the extraction cup from the heat insulation cup, and an upper edge of the extraction part extends horizontally outward to form an annular positioning part, and a lower section of the extraction part The part extends into the heat insulation cup, and the annular positioning part protrudes outside the upper end of the heat insulation cup; the extraction part has a first smoke accommodating cavity passing through the upper and lower end surfaces, and the first smoke accommodating cavity The inner wall of the body forms a limited stepped portion, and the upper end surface of the aforementioned main chamber for containing smoke is located at the lower end surface of the limited stepped portion;

The annular positioning portion is sleeved with a sealing gasket, and the sealing gasket has a second smoke accommodating sub-cavity. The inner wall of the second smoke accommodating sub-cavity is formed with an annular sealing convex edge and an annular positioning groove. The annular sealing convex The side is located above the ring-shaped positioning groove, the inner diameter of the ring-shaped sealing flange is smaller than the inner diameter of the second smoke-containing sub-cavity, the aforementioned ring-shaped positioning portion is adapted to the ring-shaped positioning groove; the lower end of the sealing gasket abuts on The upper end of the insulated cup.

As a preferred solution, the heat insulating cup has an inner side wall and an outer side wall connected to the inner side wall, and a heat insulating cavity is formed between the outer side wall and the inner side wall, and the heat insulating cavity is disposed around the periphery of the smoke cup The thermal insulation cavity is filled with thermal insulation material, or the inner and outer walls of the thermal insulation cavity are coated with a thermal insulation coating; the lower end of the thermal insulation cavity has an annular opening, and an annular pad is provided at the annular opening sheet.

As a preferred solution, a one-way intake valve is provided below the heating element, and outside air passes through the first air inlet and the one-way intake valve in sequence through the air convection gap.

As a preferred solution, the one-way intake valve includes a tapered body with a lower size and a larger size, and a mounting flange integrally connected to the periphery of the bottom end of the tapered body. On the installation flange, the top of the cone-shaped body is provided with a unidirectional ventilation hole.

As a preferred solution, a toggle switch is provided on the upper end of the heat insulation cup, the toggle switch has a toggle protrusion, a shielding portion, and a smoke body giving-in cavity, and the toggle protrusion is provided on the toggle switch At the upper end of the shielding part, there is a smoking through hole, and the smoke chamber allows the cavity to pass through the upper and lower end surfaces of the toggle switch;

In the first use state, the smoke body giving-in cavity and the smoke containing main cavity are located on the same axis to facilitate the placement of the smoke body;

In the second use state, toggle the convex part to the opposite side, the shielding part is located directly above the main chamber for accommodating smoke and the shielding part covers the upper end of the main chamber for accommodating smoke, and the smoking through hole communicates with the main Cavity.

As a preferred solution, an upper cover is installed on the upper end of the housing, and an upper cover installation cavity is provided in the upper cover, a magnetic component is installed in the upper cover installation cavity, and a magnetically attractable component is installed in the foregoing housing Metal parts, the upper cover can be connected to the housing by opening and closing, the magnetically attractable metal parts are magnetically positioned relative to the magnetic parts, the housing is provided with a main control circuit board, and the housing is provided with sensors for sensing the position of the magnetic parts Sensor, the Hall sensor is electrically connected to the main control circuit board.

Compared with the prior art, the present invention has obvious advantages and beneficial effects, specifically:

1. By contacting the heat conduction part, the air convection gap and the airflow radiation heating through hole, the heat generated by the heating element can be transferred to the smoke body through a combination of bottom thermal contact conduction and hot lateral air convection radiation, and the heat of the smoke body is improved The area and the heating efficiency of the tobacco body are evenly heated, which improves the user's taste, achieves full-scale heating of the tobacco body, and completely cuts the shredded tobacco to avoid wasting shredded tobacco;

2. Combined with the bottom heat conduction design and the top seal (in working state), the heat will not be lost upward, and the heat is well stored inside, which avoids the heat loss and greatly improves the efficiency of the use of electric energy. The intake valve is set so that the hot air will not flow down. On the one hand, the heat is prevented from being lost. On the other hand, the heat is not transferred to the main control circuit board, and the life of the flue-curing machine is extended;

3. The smoke cup is connected with the heat insulation cup, which is more convenient to use and easy to clean up the smoke residue, and the fragmentary smoke residue and smoke oil will generally stay on the contact heat conduction cup (for example: the convection cavity on the outer periphery of the protrusion), not Will fall down onto the heating element;

4. You can switch between different use states by toggle the switch, which is suitable for different smoke-generating substances and has good practicability;

5. Through the cooperation of magnetically attractable metal parts and magnetic parts, the connection and positioning between the upper cover and the housing are more accurate and reliable, especially through the detection feedback of the Hall sensor, which can ensure that only the upper cover and the housing After connecting, the heating can be started, the safety is better, and the safety accident is avoided;

6. The overall structure design is ingenious and reasonable, and the installation and positioning between the various parts are stable, ensuring the reliability and stability of the flue-cured tobacco machine during operation and extending its service life.

 BRIEF DESCRIPTION

1 is a schematic diagram of a three-dimensional assembly structure of an embodiment of the present invention;

2 is a schematic diagram of a first exploded structure of an embodiment of the present invention;

3 is a schematic diagram of a second exploded structure of the embodiment of the present invention (including a ring gasket and a one-way intake valve);

4 is a schematic diagram of a first cross-sectional structure of an embodiment of the present invention (the smoke body is not shown);

FIG. 5 is an enlarged schematic view of the structure at A in FIG. 4;

6 is a schematic diagram of a third exploded structure of an embodiment of the present invention (mainly showing the upper cover, toggle switch and magnetic member);

7 is an exploded schematic view of the heating and heat preservation device of the embodiment of the present invention;

8 is a schematic diagram of a second cross-sectional structure of an embodiment of the present invention (showing a smoke body);

9 is a schematic diagram of the enlarged structure of B in FIG. 8 (showing the main flow direction of heat);

10 is a schematic diagram of an exploded structure of a heating and heat preservation device according to another embodiment of the present invention (the heat insulation cup is not shown);

FIG. 11 is an enlarged schematic view of a partial cross-sectional structure of another embodiment of the present invention.

Description of Drawing Symbols:

10. Housing 101, installation cavity

102, the first air inlet 103, rechargeable battery

104. Main control circuit board 105. Function buttons

11. Front shell 12. Rear shell

20. Heating insulation device 21. Insulation cup

211, buckle 212, lower air intake through hole

213. Insulation material 214. Lower extension

215, thermal insulation cavity 216, thermal insulation coating

221, main chamber for accommodating smoke 222, barrel part

223, second inner cavity 224, air flow radiation heating through hole

225, cavity 226, contact heat conduction part

2261, Convection chamber 227, Ring

228, raised part 23, heating element

231, elastic connection end 24, air convection gap

25. One-way intake valve 251, installation flanging

252. Lower end extension installation cavity 253. Second air inlet

254, cone-shaped body 2541, one-way vent

26. Extraction part 261. The first tobacco-containing cavity

262, limit step part 263, annular positioning part

27. Internal forced air needle tube 271, piercing part

272, air guide cavity 273, air guide heating hole

28. Sealing washer 281, second smoke containing cavity

282, annular sealing flange 283, annular positioning groove

30. Smoke body

40. Upper cover 401, smoke body placement port

402, upper cover installation cavity 41, toggle switch

411, toggle convex part 412, blocking part

413. Cigarette concession cavity 414. Smoking through hole

51. Metal parts that can be magnetically attracted

52, Hall sensor 53, magnetic parts

54. Ring gasket 541, card slot

542, air flow through hole 543, mounting hole for elastic connection end

55. Tinfoil

 detailed description

The present invention will be further described below with reference to the drawings and specific embodiments.

As shown in FIGS. 1 to 11, an air-heated tobacco roaster with improved heating performance includes a housing 10 and a heating and thermal insulation device 20 installed on the housing 10, the housing 10 includes a front housing 11 and a rear housing 12, The front shell 11 and the rear shell 12 form an installation cavity 101 as follows, wherein:

The left and right sides of the casing 10 are connected with a left side strip and a right side strip by a snap 211. The housing 10 has an installation cavity 101 and a first air inlet 102. The heating and heat preservation device 20 is installed in the installation cavity 101. A battery is installed in the installation cavity 101 of the casing 10. In the first and second embodiments, the battery is a rechargeable battery 103, and the foregoing first air inlet 102 is provided at a charging interface (not shown in the figure). The charging interface is electrically connected to the rechargeable battery 103. Here, the charging interface is provided at the bottom of the casing 10, and the charging interface is cleverly used as the first air inlet 102.

The heating and heat preservation device 20 includes a heat insulation cup 21, a smoke cup provided in the heat insulation cup 21, and a heating element 23. The design of the heating element 23 is thin, and the heating element 23 is a product with low specific heat and small volume. It wastes very little heat. For example, the heat generating element 23 may be a ceramic element, but it is not limited to a ceramic element. The heating element 23 directly contacts and conducts heat with the contact heat conducting portion 226, and the upper surface of the contact heat conducting portion 226 directly conducts heat to the smoke body 30, forming a tendency for heat to conduct upward.

The smoke-holding cup has a smoke-holding main cavity 221 and a contact heat conducting portion 226 connected to the bottom of the smoke-holding main cavity 221, and the upper surface of the contact heat-conducting portion 226 is disposed toward the inside of the smoke-holding main cavity 221; It is arranged below the contact heat conduction part 226; an air convection gap 24 is maintained between the outer side of the smoke-containing cup and the inner side of the heat-insulating cup 21; At 224, the first air inlet 102 penetrates the air convection gap 24, and the air enters the smoke-receiving main cavity 221 through the first air inlet 102, the heating element 23, the air convection gap 24, and the airflow radiation heating through hole 224 in sequence. In order to further radiate the heat radiation upwards, tin foil paper 55 (or aluminum foil paper) is provided in the heat insulating cup 21, a lower end air inlet through hole 212 is opened at the lower end of the heat insulating cup 21, the aforementioned first air inlet 102 passes through the lower air inlet through hole 212 and the air convection gap 24, the foil 55 is installed at the lower air inlet through hole 212, and the heating element 23, the air convection gap 24 and the smoke cup are located above the foil 55 .

The smoke-receiving main cavity 221 is connected to the contact heat-conducting portion 226 separately. In this embodiment, an outer circumferential edge of the contact heat-conducting portion 226 integrally extends upward to form an annular portion 227, and the ring-shaped portion 227 and the smoke-receiving main portion The bottom end of the cavity 221 is connected. Preferably, the annular portion 227 is connected to the inside of the bottom end of the main chamber 221 for containing smoke. It should be noted that the smoke-containing main cavity 221 and the contact heat-conducting portion 226 are provided separately, and the two can be made of different materials, for example, the contact heat-conducting portion 226 can be made of a material with superior thermal conductivity. In this case, Cost can be controlled. It is also possible to select the material (heat conduction coefficient) and thickness (heat conduction area) of the contact heat conduction part 226, so that the heat conduction speed and the normal smoking speed are consistent, a part of the smoking is completed, and then a part of the baking is completed, and the smoke is finally leak-free throughout the whole process Body 30 is done.

A convex portion 228 is convexly formed on the upper surface of the contact heat conduction portion 226, and a convection cavity 2261 is formed above the contact heat conduction portion 226 corresponding to the periphery of the convex portion 228, and the air enters the main chamber for accommodating smoke through the radiation through-hole 224 Inside the body 221, it enters the convection cavity 2261 downward, and finally enters the main chamber 221 of the smoke-receiving cavity. The airflow radiation heating through hole 224 is located on the upper side of the convection cavity 2261. The raised portion 228 is used to bear against the smoke body 30, which is beneficial to air circulation and prevents air from being blocked.

A concave cavity 225 is formed at the bottom of the contact heat conducting portion 226 corresponding to the lower portion of the convex portion 228, and hot air enters the interior of the smoke body 30 through the bottom end of the smoke body 30 from the concave cavity 225, and usually the heating element 23 can be used A spring (or other structure) is provided at the lower end to keep the heating element 23 in close contact with the contact heat conduction portion 226, and the heat conduction is faster. Of course, if the design is set to reduce the spacing, the heat conduction effect can also be improved. The heating element 23 is disposed below the bottom of the contact heat conduction portion 226, and the heating element 23 is disposed at a distance from the contact heat conduction portion 226. The heating element 23 generates heat upward toward the air convection gap 24 and the cavity 225. Through the arrangement of the concave cavity 225, the heat generated by the heating element 23 can be collected in one place, and the efficiency of raising the temperature in the heat insulating cup 21 is accelerated, thereby improving the heating efficiency of the smoke body 30; in addition, the protrusion 228 and the smoke body 30 The front-end contact improves the thermal conductivity of the contact heat-conducting portion 226.

In this embodiment, the top of the convex portion 228 is provided with an air guide needle installation hole penetrating through the main chamber 221 of the cigarette holder. The air guide needle installation hole is provided with an internal forced air guide needle 27. At the top, the top of the convex portion 228 is protrudingly provided with a cylindrical portion 222 at the periphery of the air guide needle mounting hole, and the internal air guide needle tube 27 is forced to extend into the cylindrical portion 222. The internal forced air guide needle tube 27 has an air guide cavity 272 communicating with the air convection gap 24. The air guide cavity 272 extends from the bottom to the top. A plurality of through air guide cavity are provided on the side wall of the internal forced air guide needle tube 27 272 and the air-guiding heating holes 273 of the main smoke-receiving cavity 221, and the hot air flow generated by the heating element 23 passes through the concave cavity 225, the air-guiding cavity 272, and the air-guiding heating holes 273 in order to enter the main air-retaining cavity 221. The gas-guiding heating hole 273 is located above the protrusion 228.

The top end of the inner forced air guide needle tube 27 has a piercing portion 271 which is convenient for piercing into the smoke body 30; the top end of the inner forced air guide needle tube 27 is the packaging end, and the piercing portion 271 is from the inner forced air guide needle tube 27 The tip of the is projected upward, and the piercing portion 271 is tapered from bottom to top.

The smoke-holding cup can be placed up and down in the heat-insulating cup 21, the top end of the smoke-holding cup forms a sealed connection with the heat-insulating cup 21, and the upper end of the air convection gap 24 is sealed. The extraction cup 26 is connected to an extraction part 26 for facilitating the extraction of the extraction cup from the heat insulation cup 21. The upper edge of the extraction part 26 extends horizontally to form an annular positioning part 263. The lower part of the extraction part 26 extends Into the heat insulation cup 21, the annular positioning portion 263 protrudes outside the upper end of the heat insulation cup 21; the extraction portion 26 has a first smoke accommodating cavity 261 penetrating the upper and lower end surfaces, the first volume A limit step portion 262 is formed on the inner wall of the cigarette sub-cavity 261, and the upper end surface of the smoke-receiving main cavity 221 is located on the lower end surface of the limit step portion 262.

The annular positioning portion 263 is sleeved with a sealing gasket 28, and the sealing gasket 28 has a second smoke accommodating cavity 281, and an inner wall of the second smoke accommodating cavity 281 is formed with an annular sealing bead 282 and an annular positioning A groove 283 and an annular sealing bead 282 are located above the annular positioning groove 283. The inner diameter of the annular sealing bead 282 is smaller than the inner diameter of the second smoke accommodating cavity 281. After the smoke body 30 is inserted, the annular sealing bead 282 For sealing the air, the inner diameter surface of the annular sealing flange 282 is interference fit to the outer surface of the smoke body 30. The aforementioned annular positioning portion 263 fits within the annular positioning groove 283; the inner diameter of the annular sealing flange 282 is smaller than the outer diameter of the smoke body 30; and the annular sealing flange 282 is used to install the smoke body in the second smoke accommodating cavity 281 Afterwards, the hot air flow in the heat insulation cup 21 is effectively prevented from escaping outside, without taking away heat, improving the sealing performance, ensuring that the heat will not be lost, and playing a role in saving energy. The lower end of the sealing gasket 28 abuts the upper end of the heat insulation cup 21.

Between 300 degrees Celsius and 350 degrees Celsius, the smoke body 30 will not burn without the production of carbon monoxide and carbon dioxide, Hazard limits are reduced. After smoking the smoke body 30 (or smelling the smoke), the smoke body 30 will still be relatively complete, but it will become black smoke residue. Therefore, when the smoke residue is required, it is only necessary to remove the sealing gasket 28.

The heat insulation cup 21 has an upper end opening. Generally, the smoke cup is inserted into the heat insulation cup 21 from the upper end opening. The heat insulation cup 21 has an inner side wall and an outer side wall connected to the inner side wall, and a heat insulation cavity 215 is formed between the outer side wall and the inner side wall, and the heat insulation cavity 215 is disposed around the periphery of the first inner cavity 211, The heat-insulating cavity 215 is filled with heat-insulating material, or the inner and outer walls of the heat-insulating cavity 215 are coated with a heat-insulating coating 216. Of course, for better heat insulating effect, the inner side wall of the heat-insulating cup 21 and / Or the outer side wall may also be coated with the aforementioned thermal insulation coating 216; the lower end of the thermal insulation cavity 215 has an annular opening, and an annular gasket 54 is provided at the annular opening.

A one-way intake valve 25 is provided below the heating element 23, and outside air passes through the first air inlet 102 and the one-way intake valve 25 in sequence through the air convection gap 24; the foregoing foil paper 55 is located on the heating element 23 and Between the one-way intake valve 25.

The one-way intake valve includes a cone body 254 having a lower upper and a smaller size, and an installation flange 251 integrally connected to the periphery of the bottom end of the cone body 254. The lower end of the heat insulation cup 21 is sealingly pressed to the installation flange On the side 251, the top of the cone-shaped body 254 is provided with a one-way ventilation hole 2541.

In this embodiment, the installation flange is provided under the ring gasket 54. The lower end of the aforementioned heat insulating cup 21 is connected to the ring gasket 54 and the upper end surface of the ring gasket 54 blocks the ring opening. The end surface is attached to the installation flange 251, and the upper end of the one-way intake valve 25 is recessed downward to form a lower end extension portion installation cavity 252, and a lower portion of the lower end extension portion 214 extends into the lower end extension portion installation cavity 252 The lower end of the inner and lower end extension 214 abuts against the bottom wall of the lower end extension cavity 252;

A second air inlet 253 is formed concavely upward at the lower end of the one-way intake valve 25, and the second air inlet communicates with the first air inlet 102 and the lower air inlet through hole 212, respectively. The inner wall of the second air inlet 253 extends integrally to form the aforementioned cone-shaped body 254 to ensure that the hot air flow generated by the heating element 23 does not escape downward from the second air inlet 253.

Preferably, the cone-shaped body is composed of four pieces of upwardly inclined silicone (or soft) blocks, and the lower end of each piece of silicone block is integrally connected to the inner wall of the second air inlet 253 in an arc shape, and the top of the four pieces of silicone blocks Unfolded and formed the aforementioned unidirectional air vents 2541 respectively. When the outside air is sucked in from the lower end of the one-way inlet valve 25, the top ends of the four pieces of silicone blocks are respectively spread out to form the aforementioned one-way ventilation holes 2541, so that the gas from the first inlet 102 can pass through the one-way ventilation holes 2541 Enter the air convection gap 24; when the hot air in the heat insulation cup 21 flows down, the tops of the four pieces of silicone blocks are all squeezed inward to form a sealed structure to prevent the hot air from escaping from the one-way intake valve 25. Prevent air convection. It should be noted that it is not limited to four pieces of silicone blocks, but other numbers are also possible, which are not limited here.

In another embodiment, a buckle 211 is protruded from the bottom end of the heat-insulating cup 21, and a groove 541 and an air flow through hole 542 are formed on the annular gasket 54, and the buckle 211 is adapted to the groove In 541, the air flow through hole 542 penetrates the installation cavity 101 and the lower end air inlet through hole 212. Here, the inner wall of the airflow through hole 542 may also form the aforementioned one-way intake valve 25, which is not limited herein. It should be noted that, the lower end of the heating element 23 has two elastic connecting ends 231. In another embodiment, two lower inlet air inlet holes 212 are provided, and the annular gasket 54 is provided with two elastic connecting ends The mounting holes 543, each of the elastic connecting end mounting holes 543 is directly below the lower end air inlet through hole 212, and the elastic connecting end 231 of the heating element 23 sequentially passes through the corresponding lower end air inlet through hole 212 and the elastic connecting end mounting hole 543 It is connected to the following main control circuit board 104, where the elastic connecting end 231 of the heating element 23 passes through the lower air intake through hole 212, and the elastic connecting end 231 maintains a certain gap with the inner wall of the lower air intake through hole 212.

A toggle switch is provided at the upper end of the heat insulation cup, the toggle switch 41 has a toggle convex portion 411, a shielding portion 412, and a smoke body giving-in cavity 413, and the toggle convex portion 411 is provided at the toggle switch 41 At the upper end of the cover, the shielding portion 412 is located on the front and back sides of the toggle switch 41, and a smoking through hole 414 is opened above the shielding portion 412, and the cigarette body giving cavity 413 passes through the upper and lower end surfaces of the toggle switch 41,

In the first use state, the smoke body relief cavity 413 and the main smoke containing cavity are located on the same axis to facilitate the placement of the smoke body 30; in the second use state, the convex portion 411 is moved to the opposite side (this At the front side), the aforementioned shielding portion 412 is located directly above the main chamber for accommodating smoke and the covering portion 412 covers the upper end of the main chamber for accommodating smoke, and the smoking through hole 414 communicates with the main chamber for accommodating smoke; the user can The smoke is sucked through the smoking through hole 414. It should be noted that the first use state is to place smoke bodies; the second use state is to place powder (crushed) and other smoke-generating substances.

An upper cover 40 is installed at the upper end of the casing 10, and a smoke body placement port 401 is opened at the upper end of the upper cover 40, and the toggle convex portion 411 is provided behind the upper end of the toggle switch 41 and extends out of the smoke body for placement Outside the mouth 401; the upper cover 40 has an upper cover installation cavity 402, the smoke placement port 401 communicates with the upper cover installation cavity 402, the toggle switch 41 is installed in the upper cover installation cavity 402; the upper cover installation cavity 402 A magnetic member 53 is installed inside, and a magnetically attractable metal member 51 and a main control circuit board 104 are installed inside the housing 10, the magnetically attractable metal member 51 has a heat insulating cup mounting hole 511, and the heat insulating cup 21 is installed The heat-insulating cup mounting hole 511 is provided and the heat-insulating cup 21 extends out of the magnetically attractable metal part 51. The upper cover 40 can be connected to the housing 10 in an openable manner. The magnetically attractable metal part 51 and the magnetic part 53 Magnetic positioning; In this second embodiment, a Hall sensor 52 for sensing a magnetic member is provided below the magnetically attractable metal member 51, and the Hall sensor 52 is electrically connected to the main control circuit board 104.

The main control circuit board 104 is electrically connected to a temperature sensor (not shown in the figure) for detecting the temperature of the heating element 23. During smoking, when the cold air entering from the first air inlet 102 passes through the heating element 23, the hot air flow is brought to the periphery of the tobacco section of the tobacco body 30 through the air flow radiation heating through hole 224, and the temperature sensor probe detects the temperature drop After that, a signal is sent to the main control circuit board 104, and after receiving the signal, the main control circuit board 104 controls the heating element 23 to work, and then quickly replenishes heat. When not smoking, the heat of the heating element 23 is transferred to the lower end of the contact heat conduction part 226 through heat conduction. The contact heat conduction part adopts a material with good heat conduction, and then from the inside of the forced air guide needle 27 to the tobacco section 30 of the tobacco body 30.

The main control circuit board 104 is also electrically connected to a plurality of function buttons 105, and the function buttons 105 are electrically connected to the main control circuit board 104. The casing 10 is provided with a function button installation hole, and the function button 105 is installed in the function button installation hole. The function key 105 includes a key switch. In this embodiment, the key switch is arranged in a love shape, which is not limited to the above shape, and may be other shapes. When the magnetically attractable metal part 5151 of the upper cover 40 is matched with the magnetic part 5353, the Hall sensor 52 sends a signal to the main control circuit board 104, puts the smoke body 30 into the smoke body accommodating cavity, and presses the key switch to generate heat The file starts to run. After 3 to 4 seconds, the temperature of the first inner cavity 211 reaches a certain temperature. When the temperature sensor detects its temperature, for example, 350 degrees Celsius, it can remind the user to smoke by means of vibration, alarm sound or flash effect. Of course, you can also have a reminder function after smoking, and the reminder method can be vibration, sound, etc., which is not limited here.

The design points of the present invention are:

1. By contacting the heat conduction part, the air convection gap and the airflow radiation heating through hole, the heat generated by the heating element can be transferred to the smoke body through a combination of bottom thermal contact conduction and hot lateral air convection radiation, and the heat of the smoke body is improved The area and the heating efficiency of the tobacco body are evenly heated, which improves the user's taste, achieves full-scale heating of the tobacco body, and completely cuts the shredded tobacco to avoid wasting shredded tobacco;

2. Combined with the bottom heat conduction design and the top seal (in working state), the heat will not be lost upward, and the heat is well stored inside, which avoids the heat loss and greatly improves the efficiency of the use of electric energy. The intake valve is set so that the hot air will not flow down. On the one hand, the heat is prevented from being lost. On the other hand, the heat is not transferred to the main control circuit board, and the life of the flue-curing machine is extended;

3. The smoke cup is connected with the heat insulation cup, which is more convenient to use and easy to clean up the smoke residue, and the fragmentary smoke residue and smoke oil will generally stay on the contact heat conduction cup (for example: the convection cavity on the outer periphery of the protrusion), not Will fall down onto the heating element;

4. You can switch between different use states by toggle the switch, which is suitable for different smoke-generating substances and has good practicability;

5. Through the cooperation of magnetically attractable metal parts and magnetic parts, the connection and positioning between the upper cover and the housing are more accurate and reliable, especially through the detection feedback of the Hall sensor, which can ensure that only the upper cover and the housing After connecting, the heating can be started, the safety is better, and the safety accident is avoided;

6. The overall structure design is ingenious and reasonable, and the installation and positioning between the various parts are stable, ensuring the reliability and stability of the flue-cured tobacco machine during operation and extending its service life.

The above is only the preferred embodiments of the present invention, and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and modifications to the above embodiments based on the technical essence of the present invention still belong to Within the scope of the technical solution of the present invention.

Claims (10)

An air heating flue-cured tobacco machine with improved heating performance is characterized by comprising a housing and a heating and heat preservation device installed on the housing; the housing has an installation cavity and a first air inlet, and the heating and heat preservation device is installed on Inside the installation cavity; The heating and heat preservation device includes a heat-insulating cup, a smoke-holding cup and a heating element provided in the heat-insulating cup; the smoke-holding cup has a main chamber for containing smoke and a contact heat conduction part connected to the bottom of the main chamber for containing smoke, The upper surface of the heat-conducting part is disposed toward the inside of the main chamber for containing smoke; the heating element is arranged below the heat-conducting part; an air convection gap is maintained between the outer side of the cup and the inner side of the heat-insulating cup; The side wall of the main chamber for accommodating smoke is provided with an airflow radiation heating through hole, the first air inlet and the air convection gap penetrate through, and the air enters the volume through the first air inlet, the heating element, the air convection gap and the airflow radiation heating through hole Inside the main smoke chamber. The air-heated tobacco roaster with improved heating performance according to claim 1, characterized in that: the main chamber for containing tobacco is connected with the body in contact with the heat-conducting part. The air heating flue-curing machine for improving heating performance according to claim 1, wherein a convex portion is convexly formed on the upper surface of the contact heat conduction portion, and convection is formed above the contact heat conduction portion corresponding to the periphery of the convex portion In the cavity, the air enters the inside of the main chamber for accommodating smoke through the radiation heating through-hole, then enters the convection chamber downward, and finally enters the main chamber for accommodating smoke upward. The air-radiation heating through-hole is located on the upper side of the convection chamber. The air-heated tobacco roaster with improved heating performance according to claim 1, characterized in that: the smoke-holding cup can be placed up and down in the heat-insulating cup, and the top of the smoke-holding cup forms a seal with the heat-insulating cup Connection, and, the upper end of the air convection gap is sealed. The air heating flue-curing machine with improved heating performance according to claim 4, characterized in that: the smoke cup is connected with an extraction part for removing the smoke cup from the heat insulation cup, and the upper edge of the extraction part is horizontal An annular positioning portion is formed extending outward, and the lower portion of the extraction portion extends into the heat insulating cup, and the annular positioning portion extends out of the upper end of the heat insulating cup; the extraction portion has a first through the upper and lower end surfaces A smoke-containing sub-cavity, an inner wall of the first smoke-containing sub-cavity forms a limited step, and the upper end surface of the main smoke-containing main cavity is located at the lower end surface of the limited step; The annular positioning portion is sleeved with a sealing gasket, and the sealing gasket has a second smoke accommodating sub-cavity. The inner wall of the second smoke accommodating sub-cavity is formed with an annular sealing convex edge and an annular positioning groove. The annular sealing convex The side is located above the ring-shaped positioning groove, the inner diameter of the ring-shaped sealing flange is smaller than the inner diameter of the second smoke-containing sub-cavity, the aforementioned ring-shaped positioning portion is adapted to the ring-shaped positioning groove; the lower end of the sealing gasket abuts on The upper end of the insulated cup. The air heating flue-curing machine with improved heating performance according to claim 1, wherein the heat insulation cup has an inner side wall and an outer side wall connected to the inner side wall, and heat insulation is formed between the outer side wall and the inner side wall Cavity, the heat insulation cavity is arranged around the periphery of the smoke cup, the heat insulation cavity is filled with heat insulation material, or the inner and outer walls of the heat insulation cavity are coated with a heat insulation coating; The lower end has an annular opening, and an annular gasket is provided at the annular opening. The air-heated tobacco roaster with improved heating performance according to claim 1, characterized in that a one-way intake valve is provided below the heating element, and the outside air passes through the first air inlet and the one-way intake valve in sequence Air convection gap. The air heating flue-curing machine for improving heating performance according to claim 7, characterized in that the one-way intake valve includes a cone body with a lower size and a larger size, and an installation flap integrally connected to the periphery of the bottom end of the cone body The lower end of the heat insulation cup is sealed and press-fitted on the installation flange, and the top of the cone-shaped body is provided with a unidirectional ventilation hole. The air heating flue-curing machine for improving heat performance according to claim 1, characterized in that: a toggle switch is provided on the upper end of the heat insulation cup, and the toggle switch has a toggle convex portion, a shielding portion and a smoke body to let A positioning cavity, the toggle convex portion is provided at the upper end of the toggle switch, and a smoking through hole is provided above the shielding portion, and the smoke body allows the positioning cavity to pass through the upper and lower end surfaces of the toggle switch; In the first use state, the smoke body giving-in cavity and the smoke containing main cavity are located on the same axis to facilitate the placement of the smoke body; In the second use state, toggle the convex part to the opposite side, the shielding part is located directly above the main chamber for accommodating smoke and the shielding part covers the upper end of the main chamber for accommodating smoke, and the smoking through hole communicates with the main Cavity. The air heating flue-curing machine for improving heating performance according to claim 9, characterized in that: an upper cover is installed at the upper end of the casing, and an upper cover installation cavity is provided in the upper cover, and the upper cover installation cavity is provided with It is equipped with a magnetic part. The aforementioned housing is provided with a magnetically attractable metal part. The upper cover can be connected to the housing in an openable and closable manner. The magnetically attractable metal part and the magnetic part are magnetically attracted and positioned. The control circuit board, the housing is provided with a Hall sensor for sensing the position of the magnetic member, and the Hall sensor is electrically connected to the main control circuit board.