Aerosol generating article having a low temperature burning heat source

Abstract

Disclosure is an aerosol generating article having a low temperature burning heat source, including a low temperature burning smoking set and a matching cigarette, the smoking set includes a heat insulation sleeve, an annular heat conductive barrel, a cover and a heat source cigarette lighter; the barrel is provided in an annular mounting groove at a left section of an inner wall of the sleeve, the cover is provided at a left end of the sleeve, a cavity of the barrel is filled with the heat source in a sealed manner; a plurality of electric heating columns are provided at a right end of the lighter; the cover is provided with a plurality of insertion holes, and after the plurality of electric heating columns are inserted into the plurality of insertion holes, the lighter gets in contact with the barrel to ignite the heat source in the barrel.

Claims

1. An aerosol generating article having a low temperature burning heat source, comprising a low temperature burning smoking set and a matching cigarette, the low temperature burning smoking set comprises a heat insulation sleeve, an annular heat conductive barrel, a cover and a heat source cigarette lighter; a left section of an inner wall of the heat insulation sleeve is provided with an annular mounting groove, the annular heat conductive barrel is provided in the annular mounting groove, an outer wall of the annular heat conductive barrel fits with an inner wall of the annular mounting groove, an inner wall of the annular heat conductive barrel is aligned with a right section of the inner wall of the heat insulation sleeve; the cover is provided at a left end of the heat insulation sleeve, the annular heat conductive barrel has a hollow structure with a cavity inside, the cavity of the annular heat conductive barrel is filled with a low temperature burning heat source in a sealed manner; a plurality of electric heating columns are provided at a right end of the heat source cigarette lighter, the cover is provided with a plurality of insertion holes matching the plurality of electric heating columns of the heat source cigarette lighter, and after the plurality of electric heating columns are inserted into the plurality of insertion holes on the cover, the heat source cigarette lighter gets in contact with the annular heat conductive barrel to ignite the low temperature burning heat source in the annular heat conductive barrel; the matching cigarette consists of a smoke releasing section, a temperature lowering section and a solid filter section connected in sequence from left to right, and the matching cigarette is wrapped with a layer of antiflaming cigarette paper, the matching cigarette is inserted into the heat insulation sleeve from a right end of the low temperature burning smoking set, and a length of the smoke releasing section of the matching cigarette in the axial direction is greater than a length of the annular heat conductive barrel in the axial direction; the low temperature burning heat source is prepared by mixing the following raw materials in percentage by mass: 60%-80% of oxidant, 10%-15% of carbon powder, 5%-15% of binding agent, and 1%-5% of burning rate modifier.

2. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein a first magnetic ring is provided at the left end of the heat insulation sleeve, a second magnetic ring is provided at a periphery of the cover, the cover is connected to the heat insulation sleeve through attraction between the first magnetic ring and the second magnetic ring.

3. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein a central vent hole is provided in a center of the cover.

4. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein the low temperature burning heat source in the annular heat conductive barrel has a filling volume which accounts for ½-⅔ of a total volume of the cavity.

5. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein the low temperature burning heat source has a density of 1.8-2.4 g/cm.sup.2 and a burning temperature of 300-400° C.

6. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein the smoke releasing section has a smoke release medium selected from any one of tobacco shreds, tobacco particles and porous tobacco rods.

7. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein the oxidant consists of a high melting point oxidant and a low melting point oxidant with a mass ratio of 1:9.4 to 1:16.8; the high melting point oxidant has a melting point higher than 550° C.; the low melting point oxidant has a melting point lower than 400° C.

8. The aerosol generating article having the low temperature burning heat source according to claim 7, wherein the high melting point oxidant is selected from a group consisting of strontium nitrate, barium nitrate, palladium nitrate and calcium nitrate; the low melting point oxidant is selected from a group consisting of potassium nitrate, sodium nitrate, potassium chlorate, copper nitrate, magnesium nitrate, lithium nitrate and calcium chlorate.

9. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein the burning rate modifier consists of silicon dioxide and ferric oxide with a mass ratio of 1:1 to 1:2.

10. The aerosol generating article having the low temperature burning heat source according to claim 1, wherein the carbon powder has a particle diameter of ≤60 meshes, fixed carbon content is ≥85%, volatile content is ≤15%, moisture content is ≤5%, ash content ≤3%.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is an overall schematic structural diagram according to the present disclosure.

(2) FIG. 2 is a schematic structural diagram of a low temperature burning smoking set according to the present disclosure.

(3) FIG. 3 is a longitudinal section view of an annular heat conductive barrel according to the present disclosure.

(4) FIG. 4 is a transverse section view of a cover according to the present disclosure.

(5) Reference signs in the accompanying drawings: 1—cover, 11—central vent hole, 12—insertion hole, 13—second magnetic ring, 2—low temperature burning heat source, 3—heat insulation sleeve, 4—annular heat conductive barrel, 41—cavity, 5—heat source cigarette lighter, 51—electric heating column, 6—smoke releasing section, 7—temperature lowering section, 8—solid filter section, 9—antiflaming cigarette paper.

DETAILED DESCRIPTION

(6) Examples of the present disclosure will be described below in detail. The examples are implemented on the premise of the technical solutions of the present disclosure. Detailed implementations and specific operation processes are illustrated, but the protection scope of the present disclosure is not limited to the following examples.

(7) With Reference to FIG. 1 to FIG. 4, the present disclosure discloses an aerosol generating article having a low temperature burning heat source, including a low temperature burning smoking set and a matching cigarette,

(8) where the low temperature burning smoking set includes a heat insulation sleeve 3, an annular heat conductive barrel 4, a cover 1 and a heat source cigarette lighter 5; a left section of an inner wall of the heat insulation sleeve 3 is provided with an annular mounting groove, the annular heat conductive barrel 4 is provided in the annular mounting groove, the annular heat conductive barrel 4 may be an aluminum barrel, an outer wall of the annular heat conductive barrel 4 fits with the inner wall of the annular mounting groove, an inner wall of the annular heat conductive barrel 4 is aligned with the inner wall at a right section of the heat insulation sleeve 3; the cover 1 is provided at a left end of the heat insulation sleeve 3, a first magnetic ring is provided at the left end of the heat insulation sleeve 3, a second magnetic ring 13 is provided at a periphery of the cover 1, the cover 1 is connected to the heat insulation sleeve 3 through attraction between the first magnetic ring and the second magnetic ring 13.

(9) The annular heat conductive barrel 4 has a hollow structure with a cavity 41 inside, the cavity 41 of the annular heat conductive barrel 4 is filled with a low temperature burning heat source 2 in a sealed manner, the low temperature burning heat source 2 in the annular heat conductive barrel 4 has a filling volume which accounts for ½-⅔ of the total volume of the cavity 41; a plurality of electric heating columns 51 are provided at a right end of the heat source cigarette lighter 5, a central vent hole 11 is provided in the center of the cover 1, the cover 1 is provided with a plurality of insertion holes 12 matching the plurality of electric heating columns 51 of the heat source cigarette lighter 5, and after the plurality of electric heating columns 51 are inserted into the plurality of insertion holes 12 on the cover 1, the heat source cigarette lighter 5 gets in contact with the annular heat conductive barrel 4 to ignite the low temperature burning heat source 2 in the annular heat conductive barrel 4;

(10) the matching cigarette consists of a smoke releasing section 6, a temperature lowering section 7 and a solid filter section 8 connected in sequence from left to right, and the matching cigarette is wrapped with a layer of antiflaming cigarette paper 9, the matching cigarette is inserted into the heat insulation sleeve 3 from a right end of the low temperature burning smoking set, and a length of the smoke releasing section 6 of the matching cigarette in the axial direction is greater than a length of the annular heat conductive barrel 4 in the axial direction.

(11) The heat insulation sleeve 3 has a length of 35-50 mm and an outer diameter of 8 mm-12 mm. The heat insulation sleeve 3 has an inner diameter of 5-7.5 mm at its right section, and the annular mounting groove of the heat insulation sleeve 3 has an inner diameter of 7 mm-9 mm. The annular heat conductive barrel 4 has a wall thickness of 50-100 μm. The heat insulation sleeve 3 may be made of porous cordierite. The heat source cigarette lighter 5 has a heating temperature of 750 f 20° C.

(12) When using, the matching cigarette is put into the low temperature burning smoking set, the low temperature burning heat source 2 in the low temperature burning smoking set is subjected to low temperature burning, and releases heat, the heat is transferred to heat the matching cigarette within the low temperature burning smoking set, so as to generate smoke gas; where the low temperature burning heat source 2 prepared in Example 13-Example 15 and Example 17-Example 21 described below may be subjected to low temperature burning and heat release at a temperature of 300-400 degrees. The aerosol generating article possesses advantages of a simple manufacturing process, low costs, no CO release from the heat source, and no falling off of the heat source.

(13) The low temperature burning heat source 2 can be prepared according to any one of the following examples.

Example 1

(14) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 80 g of potassium nitrate is added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 2

(15) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 40 g of potassium nitrate is added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm. The burning test result: burning intensely with flames.

Example 3

(16) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 85 g of strontium nitrate is added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 4

(17) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 42.5 g of strontium nitrate is added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 5

(18) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 42.5 g of strontium nitrate and 40 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 6

(19) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 80.8 g of strontium nitrate and 4.5 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 7

(20) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 80.6 g of strontium nitrate and 4.8 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 8

(21) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 77.8 g of strontium nitrate and 7.4 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 9

(22) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 77 g of strontium nitrate and 8.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 10

(23) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 74.9 g of strontium nitrate and 10.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 11

(24) After 20 g of charcoal powder and 10 g of starch are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 71.3 g of strontium nitrate and 13.6 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 12

(25) After 18 g of charcoal powder, 11 g of starch and 4 g of clay are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 67.4 g of strontium nitrate and 9.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 13

(26) After 18 g of charcoal powder, 10 g of starch and 5 g of clay are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 67.4 g of strontium nitrate and 9.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 14

(27) After 18 g of charcoal powder, 7.5 g of starch and 7.5 g of clay are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 67.4 g of strontium nitrate and 9.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 15

(28) After 18 g of charcoal powder, 5 g of starch and 10 g of clay are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 67.4 g of strontium nitrate and 9.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 16

(29) After 18 g of charcoal powder, 4 g of starch and 11 g of clay are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 67.4 g of strontium nitrate and 9.2 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 17

(30) After 17.5 g of charcoal powder, 9.7 g of starch, 4.9 g of clay, 1.4 g of silicon dioxide and 1.6 g of ferric oxide are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 65.3 g of strontium nitrate and 8.9 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 18

(31) After 17.5 g of charcoal powder, 9.7 g of starch, 4.9 g of clay, 1.5 g of silicon dioxide and 1.5 g of ferric oxide are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 65.3 g of strontium nitrate and 8.9 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 19

(32) After 17.5 g of charcoal powder, 9.7 g of starch, 4.9 g of clay, 1.8 g of silicon dioxide and 1.2 g of ferric oxide are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 65.3 g of strontium nitrate and 8.9 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 20

(33) After 17.5 g of charcoal powder, 9.7 g of starch, 4.9 g of clay, 2 g of silicon dioxide and 1 g of ferric oxide are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 65.3 g of strontium nitrate and 8.9 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 21

(34) After 17.5 g of charcoal powder, 9.7 g of starch, 4.9 g of clay, 2.2 g of silicon dioxide and 0.8 g of ferric oxide are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 65.3 g of strontium nitrate and 8.9 g of potassium nitrate are added, after uniform mixing 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

Example 22

(35) After 91.7 g of charcoal powder, 9.7 g of starch, 4.9 g of clay, 2.2 g of silicon dioxide and 0.8 g of ferric oxide are subjected to drying, grinding and sieving through a screen of 60 meshes (drying condition: 50° C.×2 h; grinding), they are mixed uniformly, then 30 g of water is added, after uniform mixing the resulting mixture is fed into a screw extruder, an extrudate is dried at 60° C. for 4 h, then an annular low temperature combustion heat source 2 with an inner diameter of 6.0 mm, an outer diameter of 7.6 mm and a length of 50 mm.

(36) A thermal infrared imager is utilized to test burning temperature of each heat source, and the instrument emissivity is set to 0.9; a cone calorimeter is utilized to test CO release from burning of each heat source; the burning rate test method for the carbonaceous heat source invented in the patent No. CN204649661U is utilized to measure burning rate of each heat source. The above test results are summarized, as shown in Table 1.

(37) TABLE-US-00001 TABLE 1 Burning Characteristic Parameters of Each Heat Source Burning Burning CO Sample rate Temperature Release Name Burning Phenomena (mm/min) (° C.) (mg/g) Example 22 Cannot burn in the absence of oxygen, 5.2 853 230 can maintain burning in air Example 1 Burning intensely with flames, in the 45.3 839 3.0 absence of oxygen Example 2 Burning fast with flames, in the 36.8 790 5.1 absence of oxygen Example 3 Cannot perform self-sustaining burning in the absence of oxygen Example 4 Cannot perform self-sustaining burning in the absence of oxygen Example 5 In the absence of oxygen, burning slows 28.6 4.9 down compared with Example 1 and Example 2, but the burning is still relatively intense Example 6 Cannot perform self-sustaining burning in the absence of oxygen Example 7 Can perform self-sustaining burning in snatches in the absence of oxygen Example 8 Sustain burning slowly, without flames, 433 in the absence of oxygen Example 9 Performing self-sustaining burning with 22.9 457 basically no flame, in the absence of oxygen Example 10 Performing self-sustaining burning with 24.0 465 basically no flame, in the absence of oxygen Example 11 Performing self-sustaining burning with 25.3 505 basically no flame, in the absence of oxygen Example 12 Performing self-sustaining burning with 21.1 413 basically no flame, in the absence of oxygen Example 13 Performing self-sustaining burning with 20.2 396 basically no flame, in the absence of oxygen Example 14 Performing self-sustaining burning with 19.6 351 basically no flame, in the absence of oxygen Example 15 Performing self-sustaining burning with 18.9 313 basically no flame, in the absence of oxygen Example 16 Cannot sustain burning in the absence of oxygen Example 17 Performing self-sustaining burning with 16.8 389 basically no flame, in the absence of oxygen Example 18 Performing self-sustaining burning with 14.4 380 5.0 basically no flame, in the absence of oxygen Example 19 Performing self-sustaining burning with 10.7 384 4.8 basically no flame, in the absence of oxygen Example 20 Performing self-sustaining burning with 6.6 379 4.7 basically no flame, in the absence of oxygen Example 21 Performing self-sustaining burning with 4.5 383 basically no flame, in the absence of oxygen

(38) From comparison among Example 1, Example 2, Example 3 and Example 4, it can be seen that when the oxidant is just potassium nitrate, the burning is intense, with a relatively high temperature; when the oxidant is just strontium nitrate, no matter it is equivalent or excessive, the burning cannot sustain.

(39) From comparison among Example 5, Example 6, Example 7, Example 8, Example 9, Example 10 and Example 11, it can be seen that when potassium nitrate and strontium nitrate are used together as the oxidant, the burning can be self-maintained only in the case that a mass ratio of potassium nitrate to strontium nitrate is between 1:9.4 and 1:16.8, but the burning rate is still relatively fast, and the burning temperature is higher than 400′° C.

(40) From comparison among Example 12, Example 13, Example 14, Example 15 and Example 16, it can be seen that when the binding agent contains clay, the burning temperature is significantly reduced, and as the proportion of the clay increases, the burning temperature drops below 400° C., however, the burning cannot sustain when the content of the clay is excessively high.

(41) From comparison among Example 17, Example 18, Example 19, Example 20 and Example 21, it can be seen that when silicon dioxide and ferric oxide are added, the burning rate of the heat source can be significantly reduced, and when a mass ratio of silicon dioxide to ferric oxide is between 1:1 and 1:2, the burning rate of the heat source can be adjusted to a range of 5-15 mm/min.

(42) From comparison among Example 1, Example 2, Example 5, Example 18, Example 19, Example 20 and Example 22, it can be seen that the CO release of the carbonaceous heat source is much higher than that of the low temperature burning heat source 2 provided in the present disclosure, indicating that the low temperature burning heat source 2 according to the present disclosure has a significant advantage in reducing the CO release.

(43) The above examples are just preferred examples of the present disclosure, but not used to limit the present disclosure. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present disclosure should fall into the protection scope of the present disclosure.