CN106307595A - Heat preservation method of low-temperature smoking set utilizing aerogel and low-temperature tobacco evaporation equipment - Google Patents

Abstract

The invention discloses a temperature-insulating and heat-preserving method for a low-temperature smoking set using airgel, which is to cover an airgel heat-insulating layer on a tobacco evaporation equipment shell of the low-temperature smoking set. The airgel is a silica airgel with a specification of ^150-260KG /M3. The thickness of the airgel insulation layer is between 2.0 mm and 5.0 mm. The invention also discloses an evaporating device for a low-temperature smoking appliance, which includes an evaporating crucible and a heating device, the heating device is for heating the evaporating crucible, and an airgel insulation layer is coated on the outside of the evaporating crucible. Because airgel is used as the insulation layer of low-temperature tobacco evaporation equipment, airgel is the best solid insulation material at present. After the scientific screening of the present invention, the airgel with suitable density and thickness is selected as the insulation layer. Although the cost is slightly increased or decreased, the thermal insulation effect is indeed multiplied.

Description

Low-temperature smoking set heat preservation method and low-temperature tobacco evaporation equipment using airgel

technical field

The invention relates to a method for heat preservation of products in the field of daily life, in particular to a method for heat preservation of a low-temperature smoking set using airgel. At the same time, it involves a low-temperature tobacco evaporation device

Background technique

Traditional tobacco smoking generally relies on pipes or cigarettes, and the smoke produced by burning tobacco is smoked after the tobacco is lit. Because tobacco will produce a large amount of solid waste and burning tar during the combustion process, it will cause great harm to the human body and the surrounding environment. Therefore, a large number of tobacco substitutes have appeared in recent years, and one of the more typical ones is low-temperature tobacco. The appearance of low-temperature tobacco is similar to that of traditional cigarettes. It only needs to be heated and roasted until it is carbonized without burning tobacco under 350 degrees Celsius. Because it does not need to be burned, firstly, it greatly reduces the tar and harmful components produced by burning, which is less harmful than traditional cigarettes; secondly, it can fully adapt and meet the needs of consumers, and even experience a more comfortable taste.

The sales volume of traditional cigarettes has declined in some developed countries, while the market size of low-temperature tobacco products has expanded rapidly. Low-temperature tobacco products are growing rapidly, but there are also considerable development bottlenecks. Therefore, low-temperature tobacco is still in the stage of improvement, innovation and small-batch promotion, and has not reached the real commercialization level.

Low-temperature tobacco is to bake tobacco at a certain temperature, generally not higher than 350 degrees Celsius, so that the tobacco emits aroma substances and nicotine, but the main problem of low-temperature tobacco products is still reflected in the smoking set. The main defect of the current low-temperature smoking sets is the heat preservation and heat insulation of the smoking set evaporation equipment. Since low-temperature cigarettes do not burn themselves, external heat is needed to volatilize the smoke aroma. In order to realize the miniaturization of low-temperature smoking sets, heating is generally It is necessary to use electric heating, and when heating to 180-350 degrees Celsius, it is necessary to consider the heat preservation and heat insulation of the heating appliance.

The crucible is the first choice for evaporating appliances, so there is a problem of heat insulation of the crucible. It is difficult to set an insulation layer on the outside of the crucible, and it is difficult for ordinary materials to meet the requirements. It will make the smoking set seriously hot, which will bring troubles to the user. Therefore, the thermal insulation problem of low-temperature smoking sets has seriously hindered its development.

In order to overcome the above-mentioned defects, the present invention designs a heat preservation method for low-temperature smoking utensils using airgel, and at the same time designs an evaporation device for low-temperature smoking utensils.

Contents of the invention

One of the objects of the present invention is to provide a method for heat preservation of low-temperature smoking utensils using airgel, using airgel as the heat-insulating material for low-temperature smoking utensils.

The second object of the present invention is to provide a low-temperature tobacco vaporization device using airgel as a thermal insulation layer.

The heat preservation method of the low-temperature smoking set using airgel of the present invention is to cover the airgel heat-insulating layer on the shell of the tobacco evaporation equipment of the low-temperature smoking set.

Preferably, the airgel is an airgel with a specification of ^150-260KG /M3. Since the price of airgel is based on the density of the airgel and is expensive, it is very important to choose the airgel to suit the cost of low temperature tobacco paraphernalia.

Particularly preferably, the airgel is an airgel with a specification of ^180-220KG /M3.

Preferably, the thickness of the airgel insulation layer is between 2.0 mm and 5.0 mm. Since the thermal insulation effect of the airgel has a great correlation with the thickness, it is also an important task to select the thickness of the thermal insulation layer of the airgel according to the needs of the product.

Particularly preferably, the thickness of the airgel insulation layer is between 3.0 mm and 3.5 mm.

The low-temperature smoking appliance evaporating device of the present invention includes an evaporating crucible and a heating device, the heating device is for heating the evaporating crucible, and the outer side of the evaporating crucible is covered with an airgel insulation layer.

The evaporating crucible mentioned above is made of insulating ceramic material, the crucible wall is provided with electric heating wires, the crucible wall is covered with an airgel insulation layer, and the bottom of the crucible is provided with vent holes and boundary terminals.

The airgel material selection specifications mentioned above are between 180-220KG/M ³ .

The thickness of the airgel insulation layer of the above-mentioned evaporation crucible is between 3.0 mm and 3.5 mm.

Because the present invention has used airgel as the insulation layer of low-temperature tobacco evaporation equipment, because airgel is the best solid insulation material at present, after the scientific screening of the present invention, the selected density and thickness are all suitable airgel as Although the cost of the insulation layer is slightly increased or decreased, the insulation effect is indeed multiplied.

Description of drawings

Fig. 1 is the schematic diagram of the structure of the airgel insulation layer of the evaporation crucible of the low-temperature smoking appliance of the present invention;

Fig. 2 is the device structure of the airgel screening test of the present invention.

As shown in the figure: 1 is low-temperature tobacco; 2 is the evaporation crucible, 3 is the heating wire, 4 is the airgel insulation layer, 5 is the air inlet hole, 6 is the heating wire wire, 7 is the internal temperature sensor, 8 is the external temperature sensor.

detailed description

The present invention will be described in detail below with the drawings and specific embodiments. The specific embodiments of the drawings are only used to explain the technical solution of the present invention, and cannot be used to limit the scope of protection.

As shown in Figure 1, the method of the present invention is to use the airgel material with good thermal insulation effect as the thermal insulation layer of the evaporator of the low-temperature smoking appliance. Its product structure is shown in Figure 1, wherein the low-temperature evaporation equipment is a ceramic crucible 2, and the inside of the ceramic crucible 2 is pre-embedded with a heating wire 3, which has been preset inside the ceramic crucible 2 before firing, and its position is fixed. No further securing measures are required. The electric heating wire 3 is led out through a wire located at the bottom of the crucible, and is used to turn on the power supply for heating.

In addition, in order to ensure that the smoke generated by evaporation in the ceramic crucible 2 can be sucked out, several air inlets 5 for air intake are provided at the bottom of the ceramic crucible 2 .

The outside of the ceramic crucible 2 is tightly covered with a layer of airgel insulation layer, which has a good thermal insulation effect for airgel. Generally, when the internal temperature reaches 500 degrees Celsius, the external temperature can be kept not hot, that is, it is less than 50 degrees Celsius at room temperature The state is within the range that people can accept or adapt to.

When people smoke tobacco, the ceramic crucible 2 is placed in the smoking set, the inside of the ceramic crucible 2 is loaded with tobacco 1, after the power supply is turned on and heated, the tobacco can volatilize flavoring substances for smoking.

The present invention uses airgel as the insulation layer. It is well known that airgel has a good insulation effect, but is expensive. Therefore, the specification and thickness of the airgel have a great relationship with the cost, because the specification of the airgel is generally expressed by density. , the lower the density, the higher the price, and the higher the density, the lower the price. The greater the thickness of the insulation layer, the greater the amount of airgel used, and the higher the cost.

In order to obtain the best cost accounting, the present invention is realized on the basis of a large number of experiments.

As shown in Figure 2, it is the screening test device of the airgel thermal insulation material and thermal insulation layer thickness of the present invention. The device also uses an internally heated ceramic crucible as a basis, and thermal insulation layers of different specifications and thicknesses are arranged on the outside of the ceramic crucible 2, and internal and external temperature probes 7 and 8 are used to sense the temperature changes inside and outside, respectively. The experimental results are listed as follows:

Due to the characteristics of low-temperature tobacco smoking sets, the thickness of the selected airgel is not more than 6 mm, and the internal temperature exceeds 500 degrees. After the internal temperature reading is completed, the external temperature is read with a delay of two minutes.

Therefore, the thickness of the airgel insulation layer is selected to be between 2-5 millimeters, and an experiment is done every half millimeter, that is, the thickness standard of 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, and 5.0 millimeters is tested. Although the greater the thickness, the better the thermal insulation effect, but due to design requirements and product application limitations, a larger thickness is no longer selected as the experimental basis.

The internal temperature reading control points are 180, 250, 300, 350, 400, 450, 500 and other seven values.

The specifications of the airgel are 150KG/M3 for sample No. 1, 180KG/M3 for No. ² sample, 200KG/M3 for No. ³ sample, 220KG/M3 for No. ⁴ sample, and ^260KG /M3 for No. ⁵ sample No. sample and other five samples.

The current test environment temperature is room temperature 20 degrees Celsius.

Table 1: The relationship between airgel density and thermal insulation effect when the airgel thickness is 2.0mm

Table 2: The relationship between airgel density and thermal insulation effect when the airgel thickness is 2.5mm

Table 3: The relationship between airgel density and thermal insulation effect when the airgel thickness is 3.0mm

Table 4: The relationship between airgel density and thermal insulation effect when the airgel thickness is 3.5mm

Table 5: The relationship between airgel density and thermal insulation effect when the airgel thickness is 4.0mm

Table 6: The relationship between airgel density and thermal insulation effect when the airgel thickness is 4.5mm

Table 7: The relationship between airgel density and thermal insulation effect when the airgel thickness is 5.0mm

Based on the above data, all samples with an airgel thickness of 2.0-5.0 mm can meet the requirement that when the temperature inside the crucible is 500 degrees Celsius, the external temperature will be below 50 degrees Celsius after two minutes, which can meet the use effect of low-temperature smoking sets, so Considering the comprehensive cost, the volume of the low-temperature smoking set, and the complexity of processing, it can be selected according to different needs and costs within the above-mentioned thickness and sample range. In consideration of comprehensive cost, it is more appropriate to choose samples No. 2-4, corresponding to products with a density of 180KG, 200KG, 220KG and between them; in consideration of the volume of low-temperature smoking sets, the thickness of the insulation layer is generally not suitable for too thick, but in consideration of comprehensive processing accuracy. Too thin, so the selected optimal thickness range is 3.0-5.0 mm.

Claims (9)

1. A temperature insulation and heat preservation method of a low-temperature smoking set utilizing airgel, characterized in that: the tobacco evaporation equipment shell of the low-temperature smoking set is covered with an airgel insulation layer. 2. The method for heat insulation and heat preservation of a low-temperature smoking appliance using airgel according to claim 1, characterized in that: the specification of the airgel is between 150-260KG/M ³ . 3. The heat preservation method for low-temperature smoking appliances using airgel according to claim 2, characterized in that: the specification of the airgel is between ^180-220KG /M3. 4. The method for heat insulation and heat preservation of a low-temperature smoking appliance using airgel according to claim 1, 2 or 3, characterized in that: the thickness of the airgel heat preservation layer is between 2.0 mm and 5.0 mm. 5. The heat preservation method using airgel low-temperature smoking set according to claim 4, characterized in that: the thickness of the airgel heat preservation layer is between 3.0 mm and 3.5 mm. 6. An airgel heat-preserving low-temperature smoking equipment evaporator, characterized in that it comprises an evaporating crucible and a heating device, the heating device is for heating the evaporating crucible, and the outer side of the evaporating crucible is covered with an airgel insulation layer. 7. The low-temperature smoking apparatus evaporator with airgel heat preservation according to claim 6, characterized in that: the evaporator crucible is made of insulating ceramic material, an electric heating wire is embedded in the crucible wall, and the crucible wall is covered with aerogel Insulation layer, the bottom of the crucible is provided with ventilation holes and terminals. 8. The airgel heat-preserving low-temperature smoking appliance evaporating device according to claim 5 or 6, characterized in that: the selection specification of the airgel material is between 180-220KG/M ³ . 9. The airgel heat-insulated low-temperature smoking appliance evaporating device according to claim 5 or 6, characterized in that: the thickness of the airgel heat-insulation layer of the evaporator crucible is between 3.0 mm and 3.5 mm.