阅读说明：本技术 一种卷烟烟气热容量测量方法和装置 (Cigarette smoke heat capacity measuring method and device ) 是由 缪建军 杨广美 蔡小宏 于 2021-09-13 设计创作，主要内容包括：本发明属于卷烟烟气热量检测领域,涉及能够用于卷烟烟气热容量测量的方法和装置。本发明的方法包括：将卷烟样品的滤嘴端塞入两端开口的管状主体,使滤嘴与管状主体一端开口密闭连接；在管状主体中安装吸热模块和毛细热电偶；将吸烟机连接在管状主体一端开口；开启与毛细热电偶连接的温度记录仪、开启吸烟机进行抽吸；根据毛细热电偶测得的温度,计算获得卷烟烟气的热容量。本发明还包括相应的装置及其应用。使用本发明,可以很便捷准确的测定烟气通过前后吸热模块的温度和烟气的温度,继而通过计算得到烟气的热容量。(The invention belongs to the field of cigarette smoke heat detection, and relates to a method and a device for measuring cigarette smoke heat capacity. The method of the invention comprises the following steps: inserting a filter tip of a cigarette sample into a tubular main body with two open ends, and hermetically connecting the filter tip with one open end of the tubular main body; installing a heat absorption module and a capillary thermocouple in the tubular body; connecting the smoking machine to one end of the tubular main body, and opening the tubular main body; starting a temperature recorder connected with the capillary thermocouple and starting a smoking machine for suction; and calculating to obtain the heat capacity of the cigarette smoke according to the temperature measured by the capillary thermocouple. The invention also relates to a corresponding device and to the use thereof. By using the invention, the temperature of the smoke passing through the front and rear heat absorption modules and the temperature of the smoke can be conveniently and accurately measured, and then the heat capacity of the smoke is obtained by calculation.)

1. A method for measuring the heat capacity of flue gas is characterized by comprising the following steps:

s1, inserting the filter tip of the cigarette sample into a tubular main body with two open ends, and hermetically connecting the filter tip with one open end of the tubular main body;

s2, installing a heat absorption module and a capillary thermocouple in the tubular body: the heat absorption module is a porous structure made of materials with good heat conduction performance, and the periphery of the porous structure is in close contact with the inner wall of the tubular main body; at least one temperature measuring head of a capillary thermocouple is respectively arranged at the side of the heat absorption module close to the cigarette, in the heat absorption module and at the side of the heat absorption module close to the smoking machine, and the temperature measuring heads are all arranged at the axis position of the tubular main body;

s3, connecting the smoking machine to the other end of the tubular main body, wherein the other end of the tubular main body is provided with an opening;

s4, starting a temperature recorder connected with the capillary thermocouple;

s5, starting the smoking machine to smoke the cigarettes;

s6, synchronously recording the temperature of the capillary thermocouple by a temperature recorder;

and S7, calculating the heat capacity of the cigarette smoke according to the temperature measured by the capillary thermocouple.

2. The method for measuring smoke heat capacity according to claim 1, wherein in step S1, the filter is hermetically connected to the opening at one end of the tubular body by a sealing ring.

3. The method for measuring heat capacity of flue gas according to claim 1, wherein in step S2, there are at least three capillary thermocouples for measuring the temperature of flue gas before passing through the heat absorption module, the temperature of flue gas after passing through the heat absorption module, and the temperature of flue gas in the module.

4. The method for measuring smoke heat capacity according to claim 1, wherein in step S3, one end opening of the tubular body is connected to a smoking machine through a hose for smoking cigarettes.

5. The method for measuring the heat capacity of flue gas according to claim 1, wherein in step S7, the formula is calculated as:

C＝k×(T-T0)/(T1-T2)；

wherein k is the heat capacity coefficient of the heat absorption module,

t0 is the temperature of the heat absorption module when no smoke is passing,

t is the temperature of the heat absorption module after passing through the flue gas,

t1 is the flue gas temperature before passing through the heat absorption module,

t2 is the temperature of the flue gas after passing through the heat absorption module.

6. The method for measuring the heat capacity of flue gas according to any one of claims 1 to 5, wherein the heat absorption module is a circular plate made of metal with good heat conductivity, and the whole circular plate has a porous structure, so that heat can be rapidly exchanged between the flue gas and the heat absorption module.

7. The method of claim 6, wherein the periphery of the heat absorbing module is in close contact with the inner wall of the tubular body to ensure that the smoke passes through the porous structure of the disk completely during suction.

8. The device for measuring the heat capacity of the flue gas is characterized by comprising a tubular main body, a heat absorption module and a capillary thermocouple;

the tubular main body is hollow, two ends of the tubular main body are opened, a sealing ring is fixed at the opening at one end of the tubular main body and used for inserting a cigarette, and the opening at the other end of the tubular main body is used for connecting a smoking machine;

the heat absorption module is positioned in the tubular main body and is of a porous structure made of materials with good heat conduction performance, and the periphery of the porous structure is tightly contacted with the inner wall of the tubular main body;

at least three capillary thermocouples are arranged, at least one temperature measuring head of the capillary thermocouples is respectively arranged on the side of the heat absorption module close to the cigarette, the inside of the heat absorption module and the side of the heat absorption module close to the smoking machine, and the temperature measuring heads are all arranged at the axis position of the tubular main body.

9. The apparatus according to claim 8, wherein said tubular body structure is constructed of a low heat transfer material.

10. The apparatus according to claim 9, wherein the low heat transfer material has a thermal conductivity of less than 0.2w/m k and is used at a temperature of room temperature to 100 ℃.

11. The flue gas heat capacity measuring device according to claim 9, wherein the low heat transfer material is selected from one or more of the following materials, or a mixture thereof:

plastic, foam, polymer resin, glass.

12. The device for measuring smoke heat capacity according to any one of claims 8 to 11, wherein said heat absorbing module is made of metal.

13. The flue gas heat capacity measurement device of claim 12, wherein the metal is copper.

14. Use of the apparatus for measuring smoke heat capacity of any one of claims 8 to 11, wherein the heat capacity of mainstream smoke of a cigarette is measured using the apparatus for measuring smoke heat capacity.

Technical Field

The invention belongs to the field of cigarette smoke heat detection, and relates to a method and a device for measuring cigarette smoke heat capacity.

Background

The research on heating non-burning cigarettes is rising day by day, the heat source, the cigarette structure and the components of the heating non-burning cigarettes are greatly different from those of the conventional cigarettes, the smoke temperature is generally higher than that of the conventional cigarettes, and the mouth sometimes feels the scorching of smoke during smoking, so the smoke temperature is an important index for evaluating the smoke of the heating non-burning cigarettes. The invention realizes accurate measurement of the smoke temperature and is used for evaluating the smoke burning sensation. However, in practice, there are situations where different smokers of the same temperature have different sensations of heat, some have normal sensations and some may feel hot because of the different heat capacities of the different smokers. Similar to the contact of human body with 100 deg.C air or hot water, 100 deg.C air can make human body feel very hot, and 100 deg.C hot water has large heat capacity, and can scald human body. The contents of moisture, an atomizing agent and the like in the smoke of the heating non-combustion cigarette are greatly higher than those of the conventional cigarette, the heat capacity of the heating non-combustion cigarette is far higher than that of the conventional cigarette, the burning sensation of the smoke of the heating non-combustion cigarette can be comprehensively evaluated by measuring the heat capacity of the smoke, and the research on the heating non-combustion cigarette can be better supported by measuring quantitative data.

Currently, there is a report about the measurement of the heat capacity of the mainstream smoke of cigarettes, and patent CN 108872145 a, "a method for measuring the heat release amount of heat supply material of carbon-heated cigarettes by mouth-to-mouth combustion" calculates the combustion heat by measuring the combustion products, but the measured heat capacity is not the heat capacity of the mainstream smoke.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method and a device for measuring the smoke heat capacity of cigarettes, which are used for comparing the difference of the main stream smoke heat capacities of different cigarettes.

The invention provides a method for measuring the heat capacity of flue gas, which comprises the following steps:

s1, inserting the filter tip of the cigarette sample into a tubular main body with two open ends, and hermetically connecting the filter tip with one open end of the tubular main body;

s2, installing a heat absorption module and a capillary thermocouple in the tubular body: the heat absorption module is a porous structure made of materials with good heat conduction performance, and the periphery of the porous structure is in close contact with the inner wall of the tubular main body; capillary thermocouples are respectively arranged at the side of the heat absorption module close to the cigarette, in the heat absorption module and at the side of the heat absorption module close to the smoking machine, and temperature measuring heads of the capillary thermocouples are all arranged at the axis position of the tubular main body; the temperature measuring head is positioned at the axis, so that the measured temperature is more representative, and the current flue gas temperature measurement generally uses a measuring point at the axis position.

S3, connecting the smoking machine to the other end of the tubular main body, wherein the other end of the tubular main body is provided with an opening;

s4, starting a temperature recorder connected with the capillary thermocouple;

s5, starting the smoking machine to smoke the cigarettes;

s6, synchronously recording the temperature of the capillary thermocouple by a temperature recorder;

and S7, calculating the heat capacity of the cigarette smoke according to the temperature measured by the capillary thermocouple.

In the invention, the mainstream smoke passes through a heat absorption module, the heat absorption module can rapidly absorb the heat of the smoke and heat, and the temperature rise of the module and the temperatures before and after the smoke passes through are used for carrying out related calculation to realize the comparative determination of the heat contained in the smoke.

Optionally, in step S1, the filter is hermetically connected to the opening at one end of the tubular body by a sealing ring. Generally, the insertion depth does not need to be concerned, and is determined according to actual conditions. But is noted as sealing against the open inner periphery of one end of the tubular body. The sealing can be realized by adopting a conventional method, such as adding a sealing ring, using a sleeve, a bayonet and the like, and the cigarette is not required to be repeatedly used as long as the state is as close as possible to the state during smoking. Because the cigarette filter tip is softer, the filter tip can not be deformed during sealing, and a soft sealing ring can be selected.

Optionally, in step S2, at least three capillary thermocouples are provided, and are respectively used to measure the temperature of the flue gas before passing through the heat absorption module, the temperature after passing through the heat absorption module, and the temperature of the module, and the heat capacity can be calculated by averaging or weighted averaging. A temperature measuring head or a thermocouple can be added to adapt to different cigarette measuring conditions. Optionally, in step S3, one end opening of the tubular body is connected to a smoking machine through a hose for cigarette smoking. The smoking conditions of the smoking machine can be determined by industry standard methods or by the user.

Optionally, the opening of steps S4-S6 is performed in sequence.

Optionally, the smoking process comprises lighting the cigarette.

Optionally, in step S7, the formula of the calculation is:

C＝k×(T-T0)/(T1-T2)；

wherein k is a heat capacity constant of the heat absorption module, and is a fixed value for the same test device, T0 is the temperature of the heat absorption module when no flue gas passes through, T is the temperature of the heat absorption module after passing through the flue gas, T1 is the average temperature of the flue gas before passing through the heat absorption module, and T2 is the average temperature of the flue gas after passing through the heat absorption module.

Optionally, the periphery of the heat absorption module is in close contact with the inner wall of the tubular body, so that the smoke can completely pass through the porous structure during suction.

Optionally, the heat absorption module is a circular sheet made of metal with good heat conductivity, and the whole circular sheet is of a porous structure, so that heat exchange can be rapidly carried out between the smoke and the heat absorption module when the smoke passes through the circular sheet. The section of the heat absorption module is generally circular, and can be square or triangular as long as the heat absorption module can be placed inside the tubular main body. The heat absorbing module can be tightly attached to the tubular main body, and can also be tightly contacted with the inner wall of the tubular main body through a bridge. The heat absorption module can also be made of non-metal with good heat conductivity, such as carbon fiber.

Preferably, the measurement process is in the environment recommended by the cigarette smoking industry standard, and the repeatability and comparability of the measurement result are ensured.

The invention also provides a smoke heat capacity measuring device which comprises a tubular main body, a heat absorption module and a capillary thermocouple;

the tubular main body is hollow, two ends of the tubular main body are opened, a sealing ring is fixed at the opening at one end of the tubular main body and used for inserting a cigarette, and the opening at the other end of the tubular main body is used for connecting a smoking machine;

the heat absorption module is positioned in the tubular main body and is of a porous structure made of materials with good heat conduction performance, and the periphery of the porous structure is connected with the inner wall of the tubular main body in a sealing way;

the number of the capillary thermocouples is three, the sides of the heat absorption modules, which are close to the cigarette, the inner parts of the heat absorption modules and the sides of the heat absorption modules, which are close to the smoking machine, are respectively provided with capillary thermocouple temperature measuring heads, and the temperature measuring heads are all arranged at the axis position of the tubular main body.

Preferably, the flue gas heat capacity measuring device is matched with the flue gas heat capacity measuring method.

Optionally, the tubular body structure is made of a low heat transfer material. For example, the thermal conductivity of the low heat transfer material is generally lower than 0.2w/mk, and the use temperature is-40 ℃ to 300 ℃. Preferably, a plastic material is used, and the thermal conductivity is lower than 0.2 w/mk. The material is measured at normal temperature, so that the low-temperature limit is avoided, but the material can preferably resist the temperature of more than 100 ℃ in consideration of the temperature of flue gas, is easy to process and is low in price.

Optionally, the low heat transfer material is selected from one or more of the following materials, or a mixture thereof:

plastic, foam, polymer resin, glass.

Optionally, the smoke is ensured to pass through the porous structure of the heat absorption module completely during suction.

Optionally, the heat absorption module is made of metal or nonmetal with good heat conductivity, such as copper, silver, aluminum, carbon fiber, and the like, and can rapidly exchange heat with the flue gas. In a preferred embodiment of the invention copper is used.

Optionally, the shape of the opening of the tubular body is circular, triangular, square or polygonal, etc. Typically, the open end of the tubular body is shaped to conform primarily to the shape of a cigarette, preferably circular.

In a preferred embodiment of the present invention, the flue gas heat capacity measuring device comprises 5 parts, which are schematically shown in fig. 1, wherein:

1 is a tubular main body structure and is made of low heat transfer materials such as plastics.

2 is main part left end opening for insert a cigarette, has the sealing washer on the opening, guarantees that a cigarette inserts the back and seals.

And 3, the right end of the main body is provided with an opening and is connected to a smoking machine through a hose for smoking cigarettes.

And 4, the heat absorption module is a circular sheet made of metal with good heat conduction performance, and the whole circular sheet is of a porous structure, so that heat exchange can be rapidly carried out between the smoke and the heat absorption module. The periphery of the disc is hermetically connected with the tubular inner wall of the main body, so that the smoke can completely pass through the porous structure of the disc during suction.

And 5, three capillary thermocouples are provided, and the temperature measuring heads of the thermocouples are respectively positioned on the left side of the heat absorption module, the inside of the module and the right side of the module and are all positioned at the axis position of the main body structure. The device is used for measuring the temperature of the smoke before passing through the heat absorption module, the temperature after passing through the heat absorption module and the temperature of the module.

The invention also provides application of the smoke heat capacity measuring device, and the heat capacity of the main stream smoke of the cigarette is measured by using the smoke heat capacity measuring device.

By using the invention, the temperature of the smoke passing through the front and rear heat absorption modules and the temperature of the smoke can be conveniently and accurately measured, and then the heat capacity of the smoke is obtained by calculation.

Optionally, the smoke heat capacity measuring device is used for measuring or comparing the smoke burning temperature of the cigarette.

The method and the smoke heat capacity measuring device can measure the heat capacity of smoke, provide an index which is more accurate and more fit with the human body smoking feeling for the technical standard of cigarettes, and can more finely compare the performance difference of each cigarette product.

Due to the adoption of the technical scheme, the beneficial effects obtained by the invention comprise that:

1. the invention realizes the measurement of the heat capacity of the smoke for the first time, applies the heat capacity measurement method and the heat capacity measurement device to the cigarette research and provides a new measurement reference for the cigarette smoking evaluation.

2. In practice, different smokers with the same temperature may have different temperature sensations to the smoker, the heat capacity being an important reason. The invention uses the heat capacity as an index, and provides quantitative data reference for the evaluation of the burning sensation of the cigarette.

3. The method is simple, convenient, safe and quick to operate, and the used smoke heat capacity measuring device is low in cost and can be popularized and applied in a large scale.

Drawings

FIG. 1 is a schematic view of a flue gas heat capacity measuring apparatus.

Wherein, 1 is a tubular main body structure and is made of low heat transfer materials such as plastics.

2 is main part left end opening for insert a cigarette, has the sealing washer on the opening, guarantees that a cigarette inserts the back and seals.

And 3, the right end of the main body is provided with an opening and is connected to a smoking machine through a hose for smoking cigarettes.

And 4, a heat absorption module which is a circular sheet made of metal with good heat conduction performance.

And 5, three capillary thermocouples are provided, and the temperature measuring heads of the thermocouples are respectively positioned on the left side of the heat absorption module, the inside of the module and the right side of the module and are all positioned at the axis position of the main body structure. The device is used for measuring the temperature of the smoke before passing through the heat absorption module, the temperature after passing through the heat absorption module and the temperature of the module.

Fig. 2 is a schematic view of a heat absorption module.

It can be seen that the whole disc of the heat absorption module is of a porous structure, the periphery of the disc is hermetically connected with the tubular inner wall of the main body, and smoke completely passes through the porous structure of the disc during suction.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings and preferred embodiments, in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the invention.

Example 1

A flue gas heat capacity measuring apparatus, comprising 5 parts as shown in fig. 1, wherein:

the tubular main body structure is made of organic glass.

The left end opening of the main body is used for inserting cigarettes, and the opening is provided with a sealing ring to ensure that the cigarettes are sealed after being inserted.

The right end of the main body is provided with an opening and is connected to a smoking machine through a hose for smoking cigarettes.

The heat absorption module is a circular sheet made of metal with good heat conduction performance, and the whole circular sheet is of a porous structure, so that heat exchange can be rapidly carried out between the smoke and the heat absorption module. The periphery of the wafer is tightly contacted with the tubular inner wall of the main body, so that the smoke can completely pass through the porous structure of the wafer during suction.

The number of the capillary thermocouples is three, and the temperature measuring heads of the thermocouples are respectively positioned on the left side of the heat absorption module, the inside of the module and the right side of the module and are all positioned at the axis position of the main body structure. The device is used for measuring the temperature of the smoke before passing through the heat absorption module, the temperature after passing through the heat absorption module and the temperature of the module.

When the device is used, a cigarette sample is inserted into the left end of the device, the temperature recorder is started, the smoking machine is started to smoke, and the heat capacity of the smoke is calculated according to the temperature measured by the temperature measuring head of the thermocouple.

Example 2

The smoking machine and the cigarette sample 1 are respectively connected to the circular openings at the two ends of the smoke heat capacity measuring device, and the filter tip of the cigarette sample is plugged into the sealing ring with one open end, so that the filter tip is hermetically connected with the opening at one end of the tubular main body. And starting a temperature recorder and a smoking machine which are connected with the capillary thermocouple, and starting the smoking machine to suck. Porous copper foam is used as the heat absorbing module. And calculating to obtain the heat capacity of the cigarette smoke according to the temperature measured by the capillary thermocouple.

The calculation formula of the heat capacity of the flue gas is as follows:

C＝k×(T-T0)/(T1-T2)；

where k is the heat capacity constant of the heat absorption module, which in this example is 0.016J/c, T0 is the temperature of the heat absorption module when no flue gas passes, T is the temperature of the heat absorption module after passing flue gas, T1 is the average temperature of the flue gas before passing the heat absorption module, and T2 is the average temperature of the flue gas after passing the heat absorption module. Since the smoke temperature is transient, T1, T2 in this example are averaged and the measured heat capacity is a relative value, but since all tests are under the same conditions, the measurement is sufficient for comparison of the heat or heat capacity of smoke from different cigarettes.

The measurement results of the heat capacity of flue gas are shown in Table 1.

TABLE 1 measurement results of smoke heat capacity of cigarette sample 1

Number of mouths	T1	T	T2	T0	Heat capacity J/. degree.C
						1	46.0	43.0	43.8	24.2	0.137
2	44.4	41.0	42.7	25.2	0.146
						3	42.0	38.7	40.6	25.6	0.148
4	40.0	36.5	38.7	25.8	0.132
						5	38.3	34.5	37.1	25.8	0.110
6	36.9	32.9	35.7	25.7	0.095
						7	35.7	31.7	34.6	25.6	0.086

Example 3

The cigarette sample 2 is inserted into the left end of the device, the temperature recorder is started, and the smoking machine is started to perform smoking. The heat capacity constant of the heat absorption module is 0.016J/DEG C. The measurement results of the heat capacity of flue gas are shown in Table 2.

TABLE 2 measurement of Smoke Heat Capacity of cigarette sample 2

Number of mouths	T1	T	T2	T0	Heat capacity J/. degree.C
						1	42.2	38.7	39.4	22.8	0.091
2	46.3	41.3	44.1	23.8	0.132
						3	46.1	41.7	44.3	24.7	0.148
4	44.2	39.8	42.3	25.4	0.126
						5	40.3	35.6	38.7	25.6	0.101
6	37.7	33.2	36.2	25.6	0.079
						7	35.9	31.7	34.4	25.5	0.066

The above description is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present application.