Method for testing temperature distribution of appliance heating cavity

Abstract

The invention provides a method for testing temperature distribution of a heating cavity of an appliance, and relates to the field of cigarettes, and the method comprises the steps that temperature indicating paper is used for being attached to the inner circumferential wall of the heating cavity, and the temperature indicating paper is provided with marks used for indicating all positions of the inner circumferential wall of the heating cavity on the temperature indicating paper; after the temperature indicating paper is attached to the inner peripheral wall of the heating cavity for a preset time, the temperature of the corresponding position can be read according to the color change of the surface of the temperature indicating paper, so that the temperature distribution in the heating cavity of the appliance is effectively judged; according to the testing method, the temperature indicating paper is attached to the inner peripheral wall of the heating cavity for testing, and the total space temperature in the heating cavity can be completely obtained only through one-time testing.

Description

Technical Field

[0001] The present application relates to the field of cigarettes, and in particular to a method for testing the temperature distribution of a heating cavity of a device. Background Art

[0002] Currently, heated cigarettes usually refer to tobacco products that are heated without burning, and are often used in conjunction with heating devices (heated tobacco devices) to achieve smoking; the distribution of internal temperature when the heating cavity of the peripheral heating device is heated is a key indicator of whether the heated cigarette can be heated evenly.

[0003] During heating, the peripheral heating device is powered on and the annular heating cavity is used to heat the inserted heated tobacco segment. Due to the differences in the arrangement of heating resistors in the cavity and the different thermal conductivity of adjacent materials in the cavity, it is difficult to maintain a completely consistent temperature throughout the heating cavity. When measuring the temperature of the heating element of the device, the existing thermocouples and infrared temperature measurement methods have the following problems: (1) Thermocouples can only measure the temperature of a certain point in the heating cavity and cannot reflect the uniformity of the temperature of the heating cavity. In addition, since the sensor also occupies a certain volume of space, it sometimes has a certain impact on the spatial thermal field inside the device, making the measurement data inaccurate. (2) Infrared thermal imagers can only measure the surface temperature of objects and are also not suitable for measuring the spatial distribution of the entire heating cavity.

[0004] Therefore, how to intuitively reflect the spatial temperature distribution inside the heating chamber is an urgent problem to be solved in this field. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a method for testing the temperature distribution of a heating chamber of an appliance, which can intuitively reflect the temperature distribution of the heating chamber.

[0006] The technical solution of this application is as follows: A method for testing the temperature distribution of a heating chamber of an appliance, comprising: Setting a mark on the temperature indicating paper, and then attaching the temperature indicating paper to the inner peripheral wall of the heating chamber, the mark is used to indicate the position on the temperature indicating paper corresponding to the inner peripheral wall of the heating chamber; When the temperature indicating paper is attached to the heating chamber for a predetermined time, the temperature indicating paper is taken out and the temperature indicating paper is compared with the temperature colorimetric card to obtain the temperature values ​​at different positions on the inner wall of the heating chamber.

[0007] Preferably, the temperature indicating paper is wrapped around at least a portion of the outer circumference of the target object, and then the temperature indicating paper and the target object are inserted into the heating chamber together, so that the temperature indicating paper is attached to the inner circumferential wall of the heating chamber.

[0008] Preferably, the target object comprises a cigarette; and the temperature indicating paper is wrapped around the outer circumference of the cigarette.

[0009] Preferably, the cigarette includes a tobacco shred segment and a filter segment connected to each other along its axial direction, and the temperature indicating paper is wrapped around the outer peripheral surface of the tobacco shred segment.

[0010] Preferably, the measurable temperature change range of the temperature indicating paper is 150° C.-280° C., and the color development process is irreversible; after the temperature indicating paper reaches a fixed temperature, it takes no more than 5 seconds for the color to change to the final color.

[0011] Preferably, the thickness of the temperature indicating paper is configured as ; The thickness of the cigarette paper used to roll cigarettes is configured as , The thermal conductivity of the temperature indicating paper is configured as , the thermal conductivity of the paper roll is configured as , .

[0012] Preferably, before the temperature indicating paper is affixed to the inner wall of the heating chamber, a first mark and a second mark are set on the temperature indicating paper, the first mark is set along the axial direction of the heating chamber, and the second mark is set along the circumferential direction of the heating chamber, and various positions of the inner wall of the heating chamber are indicated by combining the first mark and the second mark.

[0013] Preferably, the first mark is configured as a length scale set along the axial direction of the heating chamber, and the second mark is configured as an angle scale set along the circumference of the heating chamber; when the temperature indicating paper is inserted into the heating chamber, the first mark is aligned with the alignment mark on the device.

[0014] Preferably, the temperature indicating paper is taken out after the temperature indicating paper reaches thermal equilibrium with the inner peripheral wall of the heating chamber.

[0015] Preferably, scheduled time satisfy: .

[0016] The present application provides a method for testing the temperature distribution of a heating chamber of an appliance, comprising using temperature indicator paper to adhere to the inner circumferential wall of the heating chamber, the temperature indicator paper being provided with markings for indicating various positions of the inner circumferential wall of the heating chamber on the temperature indicator paper, and after the temperature indicator paper has been adhered to the inner circumferential wall of the heating chamber for a predetermined time, the temperature of the corresponding position can be read according to the color change on the surface of the temperature indicator paper, thereby effectively determining the temperature distribution inside the heating chamber of the appliance. Compared with the point temperature measurement of thermocouples and the surface temperature measurement of infrared, the testing method of the present invention relies on the temperature indicator paper being adhered to the inner circumferential wall of the heating chamber for testing, and only one test is required to fully obtain the temperature of the entire space inside the heating chamber.

[0017] In summary, the test method provided in the present application can intuitively reflect the spatial temperature distribution of the internal cavity. In addition, since the temperature indicator paper can effectively fit the inner wall of the heating cavity and is evenly distributed in the test space, the introduction of other sensors to influence the thermal field of the internal space of the heating cavity is avoided. The test method is effective, simple and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a flow chart of the testing method provided in the embodiment of the present application; Figure 2 is another flow chart of the testing method provided in the embodiment of the present application; Figure 3 This is a schematic diagram of the structure of a cigarette inserted into a heating chamber provided in an embodiment of the present application; Figure 4 is a schematic diagram of the temperature indicating paper provided in an embodiment of the present application after being unfolded and laid flat; Figure 5 It is a schematic diagram of the structure of a cigarette and a temperature indicator paper provided in an embodiment of the present application; The reference numerals in the drawings of the specification include: 1. Apparatus; 101. Heating chamber; 102. Alignment mark; 2. Cigarette; 201. Tobacco segment; 202. Filter segment; 3. Temperature indicator paper; 301. First mark; 302. Second mark. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] like Figure 1 As shown, this embodiment provides a method for testing the temperature distribution of a heating chamber of an appliance, comprising the following steps: Step S100, setting a mark on the temperature indicating paper 3, and then attaching the temperature indicating paper 3 to the inner wall of the heating chamber 101, the mark is used to indicate the position on the temperature indicating paper 3 corresponding to the inner wall of the heating chamber; Step S200: When the temperature indicating paper 3 has been attached to the heating chamber 101 for a predetermined time, the temperature indicating paper 3 is taken out, and the temperature indicating paper 3 is compared with the temperature colorimetric card to obtain the temperature values ​​at different positions on the inner wall of the heating chamber.

[0026] In this embodiment, before testing, it is necessary to select a temperature indicating paper 3 of appropriate specifications according to the inner diameter of the heating chamber 101, so that the temperature indicating paper 3 can completely adhere to the entire inner wall of the heating chamber along the circumferential direction without exposing the inner wall of the heating chamber 101.

[0027] In this embodiment, the temperature indicator paper 3 can display different types and shades of colors in different temperature ranges, and the process is irreversible. The temperature change range of the temperature indicator paper 3 is 150°C (degrees Celsius) to 280°C, and the process is irreversible. The temperature change range can include different temperatures inside the heating chamber 101 to ensure the accuracy of the test results. The time for the temperature indicator paper 3 to change to the final color after reaching a fixed temperature is no more than 5s (seconds), that is, the reaction time of the temperature indicator paper 3 is no more than 5s, avoiding inaccurate temperature measurement caused by the temperature change inside the heating chamber 101 in a short time. After the temperature indicator paper 3 changes color due to heat, the temperature read by the temperature colorimetric card and the accurate temperature value have an error within ±5°C. The high-precision temperature indicator paper 3 can enhance the sensitivity and accuracy of temperature measurement.

[0028] In this embodiment, the temperature indicating paper 3 is designed with markings to indicate the various positions where the temperature indicating paper is in contact with the inner wall of the heating chamber. After the temperature indicating paper 3 changes color due to heat exchange, the temperature values ​​of different positions on the temperature indicating paper are obtained by comparing with the temperature colorimetric card. Combined with the markings on the temperature indicating paper 3, the temperature distribution of different positions on the inner wall of the heating chamber can be fed back.

[0029] like Figure 2 As shown, this embodiment provides a method for testing the temperature distribution of a heating chamber of an appliance, comprising the following steps: Step S110, setting marks on the temperature indicating paper 3 that can indicate the corresponding positions of the inner wall of the heating chamber. The marks on the temperature indicating paper 3 can take various forms. For example, the temperature indicating paper 3 is divided into multiple rectangular frames or annular rings, and each rectangular frame or annular ring corresponds to a different position of the inner wall of the heating chamber. For example, the temperature indicating paper 3 can be divided by scale marks, and the scale marks can define any point position on the temperature indicating paper 3, and this position can form a corresponding relationship with the corresponding position on the inner wall of the heating chamber.

[0030] like Figure 3 and Figure 4 As shown, in some preferred embodiments, a first mark 301 and a second mark 302 are provided on the temperature indicating paper 3, the first mark 301 is provided along the axial direction of the heating chamber 101, and the second mark 302 is provided along the circumferential direction of the heating chamber 101, and each position of the inner peripheral wall of the heating chamber is indicated on the temperature indicating paper 3 by combining the first mark 301 and the second mark 302. The first mark 301 can indicate the axial coordinate of the target position of the inner peripheral wall of the heating chamber in the heating chamber 101, and the second mark 302 can indicate the circumferential orientation of the target position of the inner peripheral wall of the heating chamber in the heating chamber 101, and the position corresponding to the target position can be indicated on the temperature indicating paper 3 by the axial coordinate and the circumferential orientation.

[0031] like Figure 4As shown, the first mark 301 is configured as a length scale (such as Figure 4 As shown in the dashed box, the second mark 302 is configured as an angle scale arranged along the circumference of the heating chamber 101 (such as Figure 4 As shown in the dotted line frame, if the temperature indicating paper 3 is spread out flat, the first mark 301 is scaled (in millimeters) along the length direction of the temperature indicating paper 3, and the second mark 302 is angled along the width direction of the temperature indicating paper 3, which is equally divided from 0° (degrees) to 360° (degrees). When the temperature indicating paper 3 is in the heating chamber 101, the temperature indicating paper 3 is joined to form a 360-degree ring. In this embodiment, the colors of the first mark 301 and the second mark 302 are clearly distinguished from the colors of the temperature indicating paper 3 after being heated, which is convenient for reading data.

[0032] Step S120: Figure 5 As shown, the temperature indicating paper 3 is wrapped around at least part of the outer circumference of the target object, and the outer circumference of the target object is cylindrical. In some embodiments, the temperature indicating paper 3 is completely wrapped around the outer circumference of the target object along the circumference of the target object, and the outer circumference of the target object is not exposed. Then the temperature indicating paper 3 and the target object are inserted into the heating chamber 101 together, and the outer circumference of the temperature indicating paper 3 is in contact with the inner circumference of the heating chamber 101, and the inner circumference of the temperature indicating paper 3 is wrapped around the outer circumference of the target object. Among them, the first mark 301 and the second mark 302 are set on the outer circumference of the temperature indicating paper 3. By designing the target object, it is convenient to insert and fit the temperature indicating paper 3 on the inner circumference of the heating chamber 101.

[0033] like Figure 5 As shown, the target object includes a cigarette 2 or other columnar objects. In this embodiment, when the temperature indicating paper 3 is selected, the width w of the temperature indicating paper 3 is calculated as πd according to the diameter d of the cigarette 2, and the length of the temperature indicating paper 3 is L. By selecting the length and width of the temperature indicating paper 3, the temperature indicating paper 3 can be completely wrapped around the outer peripheral surface of the cigarette 2, and the outer peripheral surface of the temperature indicating paper 3 is in contact with the inner peripheral wall of the heating chamber 101. In this embodiment, since the temperature indicating paper 3 used can be effectively fitted with the cigarette 2 and evenly distributed in the test space, the influence of introducing other sensors on the thermal field of the internal space of the heating chamber 101 is avoided; the method is effective and simple, and easy to promote.

[0034] like Figure 5As shown, the cigarette 2 includes a connected tobacco segment 201 and a filter segment 202 along its axial direction, and the temperature indicating paper 3 is wrapped on the outer peripheral surface of the tobacco segment 201. Among them, the length L of the temperature indicating paper 3 is less than the total length of the cigarette 2, and is greater than or equal to the length of the tobacco segment 201, so that the temperature indicating paper 3 is completely wrapped on the tobacco segment 201, and there is no need to wrap the entire cigarette 2, because during the test, only the tobacco segment 201 needs to be inserted into the heating chamber 101, so the temperature indicating paper 3 only needs to wrap the tobacco segment 201, which can save the temperature indicating paper 3. In this embodiment, the temperature indicating paper 3 that wraps the cigarette 2 is limited to one layer, which can save materials and avoid affecting the internal thermal field of the heating chamber 101 and reducing the accuracy of temperature measurement.

[0035] In this embodiment, the outer periphery of the cigarette 2 is formed by rolling paper (this is the prior art and will not be described in detail), and the thickness of the temperature indicating paper 3 is configured as follows: , the thickness of the roll paper is configured as , , further preferably, , which can reduce the influence of the temperature indicating paper 3 on the internal thermal field of the heating chamber 101. In some preferred embodiments, the thermal conductivity of the temperature indicating paper 3 is configured as follows: , the thermal conductivity of the paper roll is configured as , , further preferably, , which can make the temperature indicating paper 3 reach thermal equilibrium with the inner wall of the heating chamber more quickly, and reduce the impact on the thermal field of the internal space of the heating chamber 101.

[0036] In some embodiments, Figure 3 As shown, when the temperature indicating paper 3 is inserted into the heating chamber 101, the first mark 301 is aligned with the alignment mark 102 on the device 1, wherein the alignment mark 102 is arranged at the end surface of the heating chamber 101, and when the temperature indicating paper 3 is inserted into the heating chamber 101, the first mark 301 and the alignment mark 102 are parallel in the axial direction of the heating chamber 101, that is, the first mark 301 and the alignment mark 102 are aligned in the radial direction of the heating chamber 101. In this embodiment, the first mark 301 and the alignment mark 102 are aligned, so that the insertion angle of the temperature indicating paper 3 can be located when the temperature indicating paper 3 is inserted into the heating chamber 101, so that the first mark 301 and the second mark 302 can accurately correspond to different positions of the inner peripheral wall of the heating chamber, and then the device 1 can be targetedly improved according to the temperature values ​​at different positions.

[0037] In some embodiments, before inserting the temperature indicator paper 3 and the cigarette 2 into the heating chamber 101, the cigarette 2 without the temperature indicator paper 3 is first inserted into the heating chamber 101 for comparative heating, and then the cigarette 2 without the temperature indicator paper 3 is taken out after a predetermined time.

[0038] Step S210, the temperature indicator paper 3 is adhered to the inner wall of the heating chamber, and the heat is transferred from the inner wall of the heating chamber to the rolling paper, and then to the smoking mechanism inside the cigarette 2. The temperature indicator paper 3 is adhered to the inner wall of the heating chamber and heated. When the temperature indicator paper 3 and the inner wall of the heating chamber 101 reach thermal equilibrium, the temperature indicator paper 3 and the cigarette 2 are taken out together, which can ensure that the temperature indicator paper 3 changes color sufficiently and accurately reflects the temperature distribution inside the heating chamber.

[0039] In some embodiments, the temperature indicating paper 3 is attached to the inner wall of the heating chamber and heated to a predetermined time. Then, the temperature indicating paper 3 and the cigarette 2 are taken out together. satisfy: In this embodiment, the minimum heating time is configured to be 10 seconds, which can ensure that the temperature indicating paper 3 and the inner wall of the heating chamber are in full thermal equilibrium and the temperature indicating paper 3 changes color sufficiently. The maximum heating time is configured to be 20 seconds to avoid changes in the temperature of the internal cavity of the device 1, and the measured temperature cannot reflect the actual situation.

[0040] Step S220, remove the temperature indicating paper 3 on the cigarette 2 and lay it flat. Since the temperature indicating paper 3 changes color after heat exchange with the inner wall of the heating chamber, the color on the temperature indicating paper 3 is compared with the temperature colorimetric card to obtain the temperature values ​​at different positions on the temperature indicating paper 3. Since the temperature indicating paper 3 is provided with a first mark 301 and a second mark 302 corresponding to the heating chamber 101, different positions on the temperature indicating paper 3 can be matched with different positions on the inner wall of the heating chamber by combining the first mark 301 and the second mark 302, thereby representing the temperature values ​​at different positions on the inner wall of the heating chamber, which is recorded as the temperature at a certain position on the inner wall of the heating chamber at a certain time.

[0041] The testing method of the present application can intuitively measure the spatial temperature distribution of the heating cavity inside the heating smoking device, accurately locate the temperature difference distribution of the heating cavity in the heating smoking device, clearly identify the temperature difference and how much the difference is, and then conduct targeted analysis on the heating circuit in the heating smoking device and provide guidance for its optimization and improvement.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for testing the temperature distribution of a heating chamber of an appliance, characterized in that: include: Setting a mark on the temperature indicating paper, and then attaching the temperature indicating paper to the inner peripheral wall of the heating chamber, wherein the mark is used to indicate the position on the temperature indicating paper corresponding to the inner peripheral wall of the heating chamber; When the temperature indicating paper is attached to the heating chamber for a predetermined time, the temperature indicating paper is taken out and the temperature indicating paper is compared with the temperature colorimetric card to obtain the temperature values ​​at different positions on the inner wall of the heating chamber.

2. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 1, characterized in that: The temperature indicating paper is wrapped around at least a portion of the outer circumference of the target object, and then the temperature indicating paper and the target object are inserted into the heating chamber together, so that the temperature indicating paper is attached to the inner circumferential wall of the heating chamber.

3. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 2, characterized in that: The target object includes a cigarette; the temperature indicating paper is wrapped around the outer circumference of the cigarette.

4. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 3, characterized in that: The cigarette comprises a tobacco shred section and a filter section connected to each other along its axial direction, and the temperature indicating paper is wrapped on the outer peripheral surface of the tobacco shred section.

5. The method for testing the temperature distribution of the heating chamber of an appliance according to any one of claims 1 to 4, characterized in that: The measurable temperature change range of the temperature indicating paper is 150° C.-280° C., and the color development process is irreversible; after the temperature indicating paper reaches a fixed temperature, the time for the color to change to the final color is no more than 5 seconds.

6. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 5, characterized in that: The thickness of the temperature indicating paper is configured as follows: ; The thickness of the cigarette paper used to roll the cigarette is configured as follows: , ; The thermal conductivity of the temperature indicating paper is configured as , the thermal conductivity of the paper roll is configured as , .

7. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 1, characterized in that: Before the temperature indicating paper is attached to the inner wall of the heating chamber, a first mark and a second mark are set on the temperature indicating paper. The first mark is set along the axial direction of the heating chamber, and the second mark is set along the circumferential direction of the heating chamber. The various positions of the inner wall of the heating chamber are indicated by combining the first mark and the second mark.

8. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 7, characterized in that: The first mark is configured as a length scale set along the axial direction of the heating chamber, and the second mark is configured as an angle scale set along the circumference of the heating chamber; when the temperature indicating paper is inserted into the heating chamber, the first mark is aligned with the alignment mark on the device.

9. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 1, characterized in that: The temperature indicating paper is taken out after the temperature indicating paper reaches thermal equilibrium with the inner peripheral wall of the heating chamber.

10. The method for testing the temperature distribution of the heating chamber of an appliance according to claim 9, characterized in that: The scheduled time satisfy: .

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