Negative pressure distribution detection device during cigarette combustion

Abstract

A negative pressure distribution detection device during cigarette combustion comprises a detection chamber, a suction module and an inflation module, the detection chamber is composed of a base and a transparent isolation cover buckled on the base, a lifting type cigarette insertion hole and a lifting air cavity located below the cigarette insertion hole are formed in the base, the suction module is communicated with the lifting type cigarette insertion hole through a pipeline, and the inflation module is communicated with the suction module through a pipeline. The inflation module is communicated with the liftable air cavity through an air passage; the upper portion of the isolation hood is of a hemispheroid structure, gas flow meters are evenly arranged on the isolation hood, and detection heads at the lower ends of the flow meters are distributed around a cigarette combustion cone in the isolation hood. The utility model develops the detection device capable of accurately measuring the negative pressure distribution in the cigarette combustion process aiming at the current situation that the negative pressure distribution in the actual cigarette combustion process is not accurately measured in the prior art, so that the external airflow field of the cigarette can be detected, and a basis is provided for the cigarette design; the method has important practical significance for improving the combustion performance of cigarette products, optimizing the cigarette manufacturing process and improving the cigarette quality and the combustion efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of flow field detection, and specifically relates to a negative pressure distribution detection device during cigarette combustion. BACKGROUND

[0002] During the combustion process of tobacco products, especially cigarettes, the airflow distribution inside the cigarette has an important influence on the stability of combustion, the release amount of smoke and the efficiency of combustion. The airflow distribution directly affects the uniformity of cigarette combustion, and further affects the combustion completeness of tobacco, the composition and amount of smoke release, and the sensory quality and smoking experience of cigarettes. Generally, the negative pressure area generated during the combustion process of cigarettes is an important driving force for smoke flow, and research and monitoring of the negative pressure distribution during the combustion process of cigarettes have important significance for improving the quality and combustion efficiency of cigarettes.

[0003] In the prior art, research on the negative pressure distribution of cigarette combustion is mostly focused on theoretical analysis and simulation, and there is a lack of accurate measurement of the negative pressure distribution in the actual cigarette combustion process. Traditional detection equipment mostly focuses on the monitoring of combustion temperature and combustion gas, and there are problems such as insufficient precision and complex operation in the detection of negative pressure distribution. Therefore, developing a detection device capable of accurately detecting the negative pressure distribution during the combustion process of cigarettes has important practical significance for improving the combustion performance of cigarette products and optimizing the cigarette manufacturing process. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a negative pressure distribution detection device during cigarette combustion, so as to realize detection of the external flow field of the cigarette and provide a basis for cigarette design.

[0005] The utility model aims to realize the following technical scheme:

[0006] A negative pressure distribution detection device during cigarette combustion, comprising a detection chamber, a suction module and an air charging module, the detection chamber is composed of a base and a transparent isolation cover buckled on the base, a lifting type cigarette insertion hole and a liftable air cavity located below the cigarette insertion hole are arranged on the base, the suction module is communicated with the lifting type cigarette insertion hole through a pipeline, and the air charging module is communicated with the liftable air cavity through an air duct; the upper part of the isolation cover is in a hemispherical structure, gas flow meters are uniformly arranged thereon, and probe heads at the lower end of the flow meters are distributed around the cigarette combustion cone in the isolation cover; the lower part of the isolation cover has an air inlet.

[0007] Further, the lifting type cigarette insertion hole adopts a 2-5 level nested structure, and the height adjustment range is large; preferably, a 3 level nested structure is adopted.

[0008] Further, the suction module is communicated with the lifting type cigarette insertion hole through a hose.

[0009] Further, the gas flow meter uses a soap film to indicate the flow.

[0010] Further, the base is provided with an annular groove with the same diameter as the transparent isolation cover for fixing the position of the isolation cover.

[0011] Further, the lifting cigarette inserting hole is provided with a protrusion for limiting on the upper edge of each lifting mechanism except the last stage (the third lifting mechanism).

[0012] Further, the inflation module is an inflation bag.

[0013] The device for detecting the negative pressure distribution when a cigarette burns is provided in view of the fact that the prior art lacks accurate measurement of the negative pressure distribution in the actual cigarette burning process, and can effectively solve the problems of low detection precision and complex operation in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a schematic diagram of the external structure of the device;

[0015] Figure 2 Fig. 2 is a schematic diagram of the internal structure of the detection chamber of the device;

[0016] Figure 3 Fig. 3 is a schematic diagram of the base structure of the device;

[0017] Figure 4 Fig. 4 is a schematic diagram of the cross-sectional structure of the base of the device;

[0018] Figure 5 Fig. 5 is a schematic diagram of the gas flow meter structure of the device;

[0019] In the figure: 1, suction module, 2, isolation cover, 3, base, 4, flow meter, 5, inflation bag, 6, lifting cigarette inserting hole, 7, annular groove, 8, liftable air cavity, 9, first lifting mechanism, 10, second lifting mechanism, 11, third lifting mechanism, 12, air bag air supply airway, 13, suction airway, 14, hose, 15, protrusion, 16, burning cone, 17, air inlet. DETAILED DESCRIPTION

[0020] The device is further described below in combination with the drawings.

[0021] As Figures 1-5As shown: A negative pressure distribution detection device during cigarette combustion includes a detection chamber, a suction module 1, and an inflation module (i.e., an inflation bladder 5). The detection chamber consists of a base 3 and a transparent isolation cover 2 placed on the base. The base 3 is provided with a liftable cigarette insertion hole 6 and a liftable air chamber 8 located below the cigarette insertion hole. The suction module 1 is connected to the liftable cigarette insertion hole 6 through a hose 14, and the inflation module is connected to the liftable air chamber 8 through an air passage 12. The upper part of the isolation cover 2 has a hemispherical structure, on which gas flow meters 4 are evenly arranged. The probes at the lower end of the flow meters are distributed around the cigarette combustion cone 16 inside the isolation cover 2. An air inlet 17 is opened at the lower part of the transparent isolation cover.

[0022] The pop-up cigarette holder has a hierarchical structure, employing a three-level nested design (see [link]). Figure 3 , Figure 4 ), with a wide range of height adjustment.

[0023] Gas flow meter 4 uses a soap film to indicate flow rate.

[0024] The base 3 has an annular groove 7 with the same diameter as the isolation cover, which is used to fix the position of the isolation cover.

[0025] Except for the last stage (three-stage lifting mechanism 11), each stage of the lifting cigarette holder has a limit protrusion 15 on its upper edge.

[0026] During testing, each flowmeter 4 must first be moistened with soapy water. A bubble wand is dipped in soapy water, and the resulting soap film is then lightly applied to the upper part of the flowmeter 4, transferring the soap film onto the flowmeter. The position of the soap film indicates the flow rate of the flowmeter 4. Next, the isolation cover 2 is removed, and a lit cigarette is inserted into the lifting smoke inlet 6. The isolation cover 2 is placed on the base 3, and the inflation bladder 5 is inflated, lifting the lifting smoke inlet 6 to adjust the position of the combustion cone. Initially, the lifting smoke inlet 6 is at its lowest position, and then inflation is increased according to the position of the combustion cone 16. At the end of the experiment, the pressure relief valve on the inflation bladder is opened, and the lifting smoke inlet 6 returns to its lowest position. The three-stage lifting mechanism is made of stainless steel, ensuring good sealing and smooth operation. The weight of the three-stage lifting mechanism increases progressively, with the first stage being the lightest and the third stage the heaviest. During pressurization, the lightest stage is lifted first, followed by the second and third stages. Flowmeters 4 are evenly arranged on the upper hemispherical structure of the isolation cover 2, and the probes of the flowmeters 4 are distributed around the cigarette combustion cone.

[0027] Finally, the inhalation module 1 is turned on. When the cigarette is inhaled, an uneven negative pressure zone is formed near the combustion cone 16. The probes of the flow meter 4 are distributed around the negative pressure zone. The reading of the flow meter after the detection is completed can reflect the negative pressure distribution near the combustion cone.

Claims

1. A device for detecting negative pressure distribution during cigarette combustion, characterized in that, It includes a testing chamber, a suction module, and an inflation module. The testing chamber consists of a base and a transparent isolation cover placed on the base. The base is equipped with a liftable cigarette insertion hole and a liftable air chamber located below the cigarette insertion hole. The suction module is connected to the liftable cigarette insertion hole through a pipe, and the inflation module is connected to the liftable air chamber through an air passage. The upper part of the isolation cover has a hemispherical structure, on which gas flow meters are evenly arranged. The probes at the lower end of the flow meters are distributed around the cigarette combustion cone inside the isolation cover. An air inlet is opened at the lower part of the transparent isolation cover.

2. The negative pressure distribution detection device during cigarette combustion according to claim 1, characterized in that, The liftable cigarette holder has a hierarchical structure with 2-5 nested levels, allowing for a wide range of height adjustment.

3. The negative pressure distribution detection device during cigarette combustion according to claim 2, characterized in that, The lift-type cigarette holder adopts a 3-level nested structure.

4. The negative pressure distribution detection device during cigarette combustion according to claim 1, characterized in that, The suction module is connected to the lift-type cigarette insert via a flexible hose.

5. The negative pressure distribution detection device during cigarette combustion according to claim 1, characterized in that, The gas flow meter uses a soap film to indicate flow rate.

6. The negative pressure distribution detection device during cigarette combustion according to claim 1, characterized in that, The base has an annular groove with the same diameter as the transparent isolation cover, used to fix the position of the isolation cover.

7. The negative pressure distribution detection device during cigarette combustion according to claim 1, characterized in that, Except for the last stage, each stage of the lifting mechanism has a limit protrusion on its upper edge.

8. The negative pressure distribution detection device during cigarette combustion according to claim 1, characterized in that, The inflation module is an inflatable bladder.

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