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 detection device capable of accurately measuring the negative pressure distribution in the cigarette combustion process is developed aiming at the current situation that accurate measurement of the negative pressure distribution in the actual cigarette combustion process is lacked in the prior art, the external airflow field of the cigarette can be detected, and a basis is provided for 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 invention belongs to the technical field of flow field detection, and in particular relates to a device for detecting negative pressure distribution when a cigarette is burning. Background Art

[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 amount of smoke released, and the efficiency of combustion. The airflow distribution directly affects the uniformity of cigarette combustion, which in turn affects the completeness of tobacco combustion, the composition and amount of smoke released, and also affects the sensory quality of cigarettes and the smoking experience. Generally, the negative pressure area generated during the combustion of cigarettes is an important driving force for smoke flow. Studying and monitoring the negative pressure distribution during the combustion of cigarettes is of great significance to improving cigarette quality and combustion efficiency.

[0003] In the prior art, most of the research on negative pressure distribution during cigarette combustion focuses on theoretical analysis and simulation, and lacks accurate measurement of negative pressure distribution during actual cigarette combustion. Traditional detection equipment mostly focuses on monitoring combustion temperature and combustion gas, and has problems such as insufficient accuracy and complex operation in the detection of negative pressure distribution. Therefore, developing a detection device that can accurately detect negative pressure distribution during cigarette combustion is of great practical significance for improving the combustion performance of cigarette products and optimizing cigarette manufacturing processes. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting negative pressure distribution when a cigarette is burning, so as to detect the external flow field of the cigarette and provide a basis for cigarette design.

[0005] The purpose of the present invention is achieved by taking the following technical solutions: A device for detecting negative pressure distribution when a cigarette is burning, comprising a detection chamber, a suction module and an inflation module. The detection chamber consists of a base and a transparent isolation cover buckled on the base. The base is provided with a liftable cigarette insertion hole and a liftable air cavity below the cigarette insertion hole. The suction module is connected to the liftable cigarette insertion hole through a pipeline, and the inflation module is connected to the liftable air cavity through an airway. The upper part of the isolation cover is a hemispherical structure, on which gas flow meters are evenly arranged, and the detection heads at the lower ends of the flow meters are distributed around the cigarette burning cone in the isolation cover. The lower part of the isolation cover is provided with an air inlet.

[0006] Furthermore, the liftable cigarette socket adopts a 2-5 level nesting structure with a large height adjustment range; a 3-level nesting structure is preferred.

[0007] Furthermore, the suction module is connected to the lifting cigarette plug hole through a hose.

[0008] Furthermore, the gas flow meter uses a soap film to indicate the flow rate.

[0009] Furthermore, the base is provided with an annular groove having the same diameter as the transparent isolation cover, which is used to fix the position of the isolation cover.

[0010] Furthermore, each level of the lifting mechanism of the lifting cigarette insertion hole except the last level (three-level lifting mechanism) has a protrusion for limiting the upper edge.

[0011] Furthermore, the inflation module is an inflatable bag.

[0012] The beneficial effects of the present invention are as follows: in view of the current situation in which the prior art lacks accurate measurement of the negative pressure distribution during the actual combustion of cigarettes, a device for detecting the negative pressure distribution during the combustion of cigarettes is provided, which can effectively solve the problems of low detection accuracy and complex operation in the prior art; it can realize the detection of the external flow field of the cigarette, provide a basis for cigarette design, and has important practical significance for improving the combustion performance of cigarette products, optimizing the cigarette manufacturing process, and improving the quality and combustion efficiency of cigarettes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the appearance structure of the device of the present invention; Figure 2 This is a schematic diagram of the internal structure of the detection chamber of the device; Figure 3 This is a schematic diagram of the base structure of the device; Figure 4 This is a schematic diagram of the cross-sectional structure of the base of the device; Figure 5 This is a schematic diagram of the structure of the gas flow meter of this device; In the figure: 1. suction module, 2. isolation cover, 3. base, 4. flow meter, 5. inflatable bag, 6. lifting cigarette plug hole, 7. annular groove, 8. liftable air cavity, 9. first-stage lifting mechanism, 10. second-stage lifting mechanism, 11. third-stage lifting mechanism, 12. air bag air supply duct, 13. suction air duct, 14. hose, 15. protrusion, 16. combustion cone, 17. air inlet hole. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] like Figure 1-5As shown: a negative pressure distribution detection device when a cigarette is burning, comprising a detection chamber, a suction module 1 and an inflation module (i.e., an inflation bag 5); the detection chamber is composed of a base 3 and a transparent isolation cover 2 buckled on the base; a liftable cigarette insertion hole 6 and a liftable air cavity 8 located below the cigarette insertion hole are provided on the base 3; the suction module 1 is communicated with the liftable cigarette insertion hole 6 through a hose 14, and the inflation module is communicated with the liftable air cavity 8 through an airway 12; the upper part of the isolation cover 2 is a hemispherical structure, on which gas flow meters 4 are evenly arranged, and the detection heads at the lower ends of the flow meters are distributed around the cigarette burning cone 16 in the isolation cover 2, and an air inlet hole 17 is opened at the lower part of the transparent isolation cover.

[0016] The lifting cigarette socket is a hierarchical structure with three levels of nesting (see Figure 3 , Figure 4 ), with a wide height adjustment range.

[0017] The gas flow meter 4 uses a soap film to indicate the flow rate.

[0018] The base 3 is provided with an annular groove 7 having the same diameter as the isolation cover for fixing the position of the isolation cover.

[0019] Each level of the lifting mechanism except the last level (three-level lifting mechanism 11) has a protrusion 15 for limiting the upper edge of the lifting cigarette insertion hole.

[0020] When testing this device, each flow meter 4 needs to be moistened with soapy water first, and a bubble stick is used to dip in soapy water, and then the soap film produced is lightly touched to the upper part of the flow meter 4, so that the soap film is transferred to the flow meter 4, and the position of the soap film is used to indicate the flow of the flow meter 4. Then, the isolation cover 2 is removed during the test, and the lit cigarette is inserted into the lifting cigarette insertion hole 6. The isolation cover 2 is placed on the base 3, and the inflatable bag 5 is inflated, so that the lifting cigarette insertion hole 6 can be lifted up to adjust the position of the combustion cone. In the initial stage, the lifting cigarette insertion hole 6 is at the lowest position, and then it is inflated and raised according to the position of the combustion cone 16. At the end of the experiment, the pressure relief valve on the inflatable bag is opened, and the lifting cigarette insertion hole 6 is lowered to the low position again. The three-level lifting mechanism is made of stainless steel, which is well sealed and keeps each other smooth. The weight of the three-level lifting mechanism increases step by step, with the first level being the lightest and the third level being the heaviest. When the pressure is increased, the lightest level will be lifted up first, followed by the second and third levels. Flow meters 4 are evenly arranged on the hemispherical structure on the upper part of the isolation cover 2, and the detection heads of the flow meters 4 are distributed around the burning cone of the cigarette.

[0021] Finally, the suction module 1 is turned on. When the cigarette is smoked, an uneven negative pressure area will be formed near the combustion cone 16. The detection heads of the flow meter 4 are distributed around the negative pressure area. The reading of the flow meter after the detection can reflect the negative pressure distribution near the combustion cone.

Claims

1. A device for detecting negative pressure distribution during cigarette burning, characterized in that: It includes 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. The base is provided with a liftable cigarette insertion hole and a liftable air cavity below the cigarette insertion hole. The suction module is connected with the liftable cigarette insertion hole through a pipeline, and the inflation module is connected with the liftable air cavity through an airway. The upper part of the isolation cover is a hemispherical structure, on which gas flow meters are evenly arranged. The detection heads at the lower end of the flow meters are distributed around the burning cone of the cigarette in the isolation cover, and an air inlet hole is opened at the lower part of the transparent isolation cover.

2. The device for detecting negative pressure distribution during cigarette burning according to claim 1, characterized in that: The lifting type cigarette plug hole is a hierarchical structure, adopts a 2-5 level nesting method, and has a large height adjustment range.

3. The device for detecting negative pressure distribution during cigarette burning according to claim 2, characterized in that: The lifting type cigarette plug hole adopts a three-level nesting structure.

4. The device for detecting negative pressure distribution during cigarette burning according to claim 1, characterized in that: The suction module is communicated with the lifting type cigarette plugging hole through a hose.

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

6. The device for detecting negative pressure distribution during cigarette burning according to claim 1, characterized in that: The base is provided with an annular groove having the same diameter as the transparent isolation cover, which is used to fix the position of the isolation cover.

7. The device for detecting negative pressure distribution during cigarette burning according to claim 1, characterized in that: Each level of the lifting and lowering mechanism of the lifting and lowering cigarette insertion hole, except for the last level, has a protrusion on the upper edge for limiting the position.

8. The device for detecting negative pressure distribution during cigarette burning according to claim 1, characterized in that: The inflatable module is an inflatable bag.

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