Electromagnetic heating cigarette device and electromagnetic heating system

Abstract

The present invention relates to the technical field of electromagnetic heating. Disclosed are an electromagnetic heating cigarette device and an electromagnetic heating system. The electromagnetic heating cigarette device comprises: a housing, an electromagnetic coil, a parameter acquisition module, a driving device and a control module; when an alternating current is applied to the electromagnetic coil, a varying alternating magnetic field is generated, the parameter acquisition module acquires the magnetic field strength in a heating cavity, and when the magnetic field strength is less than a preset magnetic field strength, the control module controls, by means of the driving device, the electromagnetic coil to move in the housing until a new magnetic field strength reaches the preset magnetic field strength. It can be seen that in the present application, when the magnetic field strength at the position where a ferromagnetic element in a cigarette is located is less than the preset magnetic field strength, the control module controls, by means of the driving device, the electromagnetic coil to move in the housing until the new magnetic field strength is the preset magnetic field strength, and at this time, the ferromagnetic element in the cigarette is located at the center position of the alternating magnetic field, so as to achieve the maximum heating efficiency of the electromagnetic heating cigarette device and improve the satisfaction of the user experience.

Description

An electromagnetic heating smoke appliance and electromagnetic heating system

[0001] This application claims priority to Chinese Patent Application No. CN202411969868.2, filed on December 30, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0002] This invention relates to the field of electromagnetic heating technology, and in particular to an electromagnetic heating smoke appliance and an electromagnetic heating system. Background Technology

[0003] When alternating current passes through the electromagnetic coil inside an electromagnetically heated smoking device, it generates a changing alternating magnetic field. When a cigarette is placed inside, the ferromagnetic element in the cigarette experiences eddy currents in the alternating magnetic field, inducing Joule heating and thus heating the cigarette. Because the magnetic field strength varies at different locations in space, cigarettes are typically designed so that when inserted into the heating chamber of the device, the ferromagnetic element is positioned at the maximum magnetic field strength, resulting in maximum heating efficiency. Normally, the ferromagnetic element is located in the center of the smoking section. However, during cigarette manufacturing, the ferromagnetic element may deviate from this center position. In such cases, when the cigarette is inserted into the device, the ferromagnetic element is not at the maximum magnetic field strength, preventing the device from achieving maximum heating efficiency and negatively impacting the consumer experience. Summary of the Invention

[0004] The purpose of this invention is to provide an electromagnetic heating smoking appliance and an electromagnetic heating system. When the magnetic field strength at the location of the ferromagnetic element in the cigarette is less than a preset magnetic field strength, the control module controls the electromagnetic coil to move within the housing via a drive device until the new magnetic field strength is equal to the preset magnetic field strength. At this point, the ferromagnetic element in the cigarette is at the center of the alternating magnetic field, thereby maximizing the heating efficiency of the electromagnetic heating smoking appliance and improving user satisfaction.

[0005] To solve the above-mentioned technical problems, the present invention provides an electromagnetic heating smoke appliance, comprising:

[0006] The housing has a heating chamber located at one end of the electromagnetic heating smoke appliance, used to hold and heat the cigarette stick;

[0007] An electromagnetic coil is disposed inside the housing and also disposed on the outer wall of the heating cavity. The electromagnetic coil is connected to alternating current and is used to generate an alternating magnetic field in the heating cavity using the alternating current.

[0008] A parameter acquisition module is disposed inside the housing and is used to acquire the magnetic field strength inside the heating cavity;

[0009] A driving device, wherein the driving device is connected to the electromagnetic coil;

[0010] A control module, connected to the drive device, is used to control the electromagnetic coil to move within the housing when the magnetic field strength is less than a preset magnetic field strength, until the new magnetic field strength reaches the preset magnetic field strength.

[0011] Optionally, the driving device is also connected to the parameter acquisition module. Specifically, the control module is used to control the electromagnetic coil and the parameter acquisition module to move synchronously within the housing when the magnetic field strength is less than the preset magnetic field strength, until the magnetic field strength reaches the preset magnetic field strength.

[0012] Optionally, the control module is also used to control the drive device to stop operating when the magnetic field strength is a preset blank magnetic field strength;

[0013] The preset blank magnetic field strength is the magnetic field strength collected by the parameter acquisition module when the heating chamber is not filled with the cigarette.

[0014] Optionally, the parameter acquisition module includes:

[0015] A sensor, disposed within the housing, is used to collect the magnetic field strength of the alternating magnetic field;

[0016] A parameter conversion module, connected to the sensor, is used to convert the magnetic field strength into an electrical signal. The value of the electrical signal is positively correlated with the magnetic field strength, and the electrical signal is voltage / current.

[0017] Accordingly, when the magnetic field strength is less than the preset magnetic field strength, the driving device controls the electromagnetic coil to move within the housing until the new magnetic field strength reaches the preset magnetic field strength, including:

[0018] When the electrical signal is less than a preset electrical signal threshold, the driving device controls the electromagnetic coil to move within the housing until a new electrical signal reaches the preset electrical signal threshold, which corresponds to the preset magnetic field strength.

[0019] Optionally, the sensor is an induction coil, and the inner diameter of the induction coil is smaller than the inner diameter of the heating cavity.

[0020] Optionally, the axis of the induction coil is parallel to the axis of the electromagnetic coil.

[0021] Optionally, the central axis of the induction coil is aligned with the central axis of the electromagnetic coil.

[0022] Optionally, the induction coil is an air coil.

[0023] Optionally, the electromagnetic coil is controlled to move within the housing by the driving device until the new magnetic field strength reaches the preset magnetic field strength, including:

[0024] The driving device controls the electromagnetic coil to move in a first preset direction within the housing;

[0025] During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, the electromagnetic coil is controlled to move in the opposite direction of the first preset direction; if the difference between the new magnetic field strength and the preset magnetic field strength decreases, the electromagnetic coil is controlled to continue moving in the first preset direction.

[0026] If, during the movement along a movable path in the first preset direction or the opposite direction of the first preset direction, the new magnetic field strength reaches the preset magnetic field strength, the electromagnetic coil is controlled to stop moving.

[0027] If, during the movement along a movable path in the first preset direction or the opposite direction of the first preset direction, the new magnetic field strength never reaches the preset magnetic field strength, the first position with the smallest difference between the new magnetic field strength and the preset magnetic field strength is determined.

[0028] The electromagnetic coil is controlled to continue moving in a second preset direction, starting from the first position.

[0029] During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, the electromagnetic coil is controlled to move in the opposite direction of the second preset direction; if the difference between the new magnetic field strength and the preset magnetic field strength decreases, the electromagnetic coil is controlled to continue moving in the second preset direction.

[0030] If, during the movement along a movable path in the second preset direction or the opposite direction of the second preset direction, the new magnetic field strength reaches the preset magnetic field strength, the electromagnetic coil is controlled to stop moving.

[0031] If the first preset direction is the axial direction of the electromagnetic coil, then the second preset direction is the radial direction of the electromagnetic coil; if the first preset direction is the radial direction of the electromagnetic coil, then the second preset direction is the axial direction of the electromagnetic coil.

[0032] The present invention also provides an electromagnetic heating system, including a cigarette and an electromagnetic heating smoking device as described above, wherein the cigarette includes a smoke-generating section and a ferromagnetic element disposed within the smoke-generating section.

[0033] This application provides an electromagnetic heating smoking appliance and an electromagnetic heating system. The electromagnetic heating smoking appliance includes a housing, an electromagnetic coil, a parameter acquisition module, a driving device, and a control module. When alternating current is applied to the electromagnetic coil, a changing alternating magnetic field is generated. The parameter acquisition module acquires the magnetic field strength within the heating cavity. When the magnetic field strength is less than a preset magnetic field strength, the control module controls the electromagnetic coil to move within the housing via the driving device until the new magnetic field strength reaches the preset magnetic field strength. Therefore, this application uses the parameter acquisition module to acquire the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil within the heating cavity. When a cigarette is placed in the heating cavity, the magnetic field strength acquired by the parameter acquisition module is the magnetic field strength at the location of the ferromagnetic element in the cigarette. Then, when the magnetic field strength at the location of the ferromagnetic element in the cigarette is less than the preset magnetic field strength, the control module controls the electromagnetic coil to move within the housing via the driving device until the new magnetic field strength reaches the preset magnetic field strength. At this point, the ferromagnetic element in the cigarette is at the center of the alternating magnetic field, thereby achieving maximum heating efficiency of the electromagnetic heating smoking appliance and improving user satisfaction. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 is a cross-sectional view of an electromagnetic heating smoke appliance provided by the present invention. Detailed Implementation

[0036] The core of this invention is to provide an electromagnetic heating smoke appliance and an electromagnetic heating system. When the magnetic field strength is less than a preset magnetic field strength, the control module controls the electromagnetic coil to move within the housing through a drive device until the new magnetic field strength is the preset magnetic field strength, thereby achieving the maximum heating efficiency of the electromagnetic heating smoke appliance and improving user satisfaction.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Because the alternating magnetic field generated by the electromagnetic coil has varying strengths at different locations in space, cigarettes are generally designed so that the cigarette stick is inserted into the heating chamber of an electromagnetic heating device. The heating efficiency of the device is maximized when the ferromagnetic element in the cigarette is at the position of maximum magnetic field strength. Normally, the ferromagnetic element in the cigarette stick is located in the center of the smoke-generating section. However, during the cigarette manufacturing process, the ferromagnetic element may deviate from the center of the smoke-generating section. In such cases, when the cigarette is inserted into the electromagnetic heating device, the device cannot achieve maximum heating efficiency because the ferromagnetic element is not at the position of maximum magnetic field strength, thus affecting the consumer experience.

[0039] To address the aforementioned technical problems, this invention provides an electromagnetic heating smoke appliance.

[0040] Specifically, please refer to Figure 1, which is a cross-sectional view of an electromagnetic heating smoke appliance provided by the present invention.

[0041] The electromagnetic heating smoke appliance includes:

[0042] The housing 1 has a heating chamber 2, which is located at one end of the electromagnetic heating smoke appliance and is used to hold the cigarette stick.

[0043] Electromagnetic coil 3 is disposed inside the housing 1 and is also disposed on the outer wall of the heating chamber 2. Electromagnetic coil 3 is connected to alternating current and is used to generate an alternating magnetic field using alternating current.

[0044] Parameter acquisition module 4 is installed inside the housing 1 and is used to acquire the magnetic field strength of the alternating magnetic field.

[0045] Drive device 5, which is connected to electromagnetic coil 3;

[0046] The control module 6 is connected to the drive device 5 and is used to control the electromagnetic coil 3 to move inside the housing 1 when the magnetic field strength is less than the preset magnetic field strength, until the new magnetic field strength reaches the preset magnetic field strength.

[0047] The electromagnetic heating smoking device includes a housing 1, a heating chamber 2, an electromagnetic coil 3, a parameter acquisition module 4, a drive device 5, and a control module 6. It should be noted that one end of the housing 1 has a groove, which serves as the heating chamber 2. The electromagnetic coil 3, parameter acquisition module 4, drive device 5, and control module 6 are all housed within the housing 1. When the alternating current of the electromagnetic heating smoking device passes through the electromagnetic coil 3, it generates a changing alternating magnetic field. When a cigarette is placed in the device, the ferromagnetic elements within the cigarette generate eddy currents in the alternating magnetic field, inducing a Joule heating effect, thereby heating the cigarette. The alternating current of the electromagnetic heating smoking device is supplied by a power module 7 inside the device. The power module 7 includes a battery and an inverter circuit. The direct current from the battery is converted into alternating current by the inverter circuit to power the electromagnetic coil 3. The inner diameter of the electromagnetic coil 3 is larger than the inner diameter of the heating chamber 2, and the inner radius of the electromagnetic coil 3 can be a preset length greater than the outer radius of the heating chamber 2 (including wall thickness), for example, 0–3 mm.

[0048] Furthermore, since the ferromagnetic elements contained in the cigarette stick affect the alternating magnetic field generated by the electromagnetic heating device, thereby changing the magnetic field strength at the location of the parameter acquisition module 4, and the magnetic field strength acquired by the parameter acquisition module 4 varies depending on the spatial position of the electromagnetic heating element in the cigarette stick, in order to achieve the maximum heating efficiency of the electromagnetic heating device even when the position of the ferromagnetic element in the cigarette stick is deviated from the center of the smoke-generating section, this embodiment sets up a parameter acquisition module 4 and a driving device 5 inside the housing 1. The parameter acquisition module 4 acquires the magnetic field strength of the alternating magnetic field generated by the alternating current in real time. When the magnetic field strength is less than the preset magnetic field strength, the driving device 5 controls the electromagnetic coil 3 to move within the housing 1. During the movement, it can first move in one of the radial and axial directions of the electromagnetic coil 3, and then move in the other direction. The radial and axial movements are independent of each other and do not interfere with each other. During the movement, it can also move in both the radial and axial directions of the electromagnetic coil 3 simultaneously until the new magnetic field strength reaches the preset magnetic field strength, that is, the heating efficiency of the electromagnetic heating device reaches its maximum.

[0049] In addition, the drive device 5 can also be connected to the parameter acquisition module 4. The control module 6 is specifically used to control the electromagnetic coil 3 and the parameter acquisition module 4 to move synchronously within the housing 1 through the drive device 5 when the magnetic field strength is less than the preset magnetic field strength, until the magnetic field strength reaches the preset magnetic field strength, thereby improving the accuracy and reliability of the magnetic field strength acquired by the parameter acquisition module 4. The drive device 5 can be connected to the electromagnetic coil 3 and the parameter acquisition module 4 respectively through the connector 8.

[0050] As can be seen, in this embodiment, the parameter acquisition module 4 collects the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil 3 in the heating chamber 2. When a cigarette is placed in the heating chamber 2, the magnetic field strength collected by the parameter acquisition module 4 is the magnetic field strength at the location of the ferromagnetic element in the cigarette. Then, when the magnetic field strength at the location of the ferromagnetic element in the cigarette is less than the preset magnetic field strength, the control module 6 controls the electromagnetic coil 3 to move in the housing 1 through the drive device 5 until the new magnetic field strength is the preset magnetic field strength. At this time, the ferromagnetic element in the cigarette is at the center of the alternating magnetic field, so as to achieve the maximum heating efficiency of the electromagnetic heating cigarette and improve the user's satisfaction.

[0051] Based on the above embodiments:

[0052] As an optional embodiment, the driving device 5 is also connected to the parameter acquisition module 4. The control module 6 is specifically used to control the electromagnetic coil 3 and the parameter acquisition module 4 to move synchronously within the housing 1 through the driving device 5 when the magnetic field strength is less than the preset magnetic field strength, until the magnetic field strength reaches the preset magnetic field strength.

[0053] Specifically, in order to improve the accuracy and reliability of the magnetic field strength acquired by the parameter acquisition module 4 and maximize the heating efficiency of the electromagnetic heating appliance, this embodiment connects the parameter acquisition module 4 to the driving device 5. When the magnetic field strength is less than the preset magnetic field strength, the control module 6 controls the electromagnetic coil 3 and the parameter acquisition module 4 to move synchronously within the housing 1 through the driving device 5, ensuring that the relative positions of the electromagnetic coil 3 and the parameter acquisition module 4 remain unchanged.

[0054] As can be seen, in this embodiment, the parameter acquisition module 4 is connected to the driving device 5. When the magnetic field strength is less than the preset magnetic field strength, the control module 6 controls the electromagnetic coil 3 and the parameter acquisition module 4 to move synchronously in the housing 1 through the driving device 5, which improves the accuracy and reliability of the magnetic field strength acquired by the parameter acquisition module 4 and ensures that the heating efficiency of the electromagnetic heating smoke appliance reaches the maximum.

[0055] As an optional embodiment, the control module 6 is also used to control the drive device 5 to stop operating when the magnetic field strength is a preset blank magnetic field strength;

[0056] The preset blank magnetic field strength is the magnetic field strength collected by parameter acquisition module 4 when no cigarette is placed in heating chamber 2.

[0057] Specifically, when no cigarette is placed in the heating chamber 2, the heating efficiency of the electromagnetic heating device is 0. Whether the electromagnetic coil 3 moves or not will not affect the heating efficiency of the electromagnetic heating device. In order to reduce the energy consumption of the electromagnetic heating device, the control module 6 controls the drive device 5 to stop running when the magnetic field strength is the preset blank magnetic field strength. That is, the control module 6 controls the drive device 5 to stop running when it is not necessary to move the electromagnetic coil 3 to improve the heating efficiency of the electromagnetic heating device, so that the electromagnetic coil 3 stops moving. The preset blank magnetic field strength is the magnetic field strength collected by the parameter acquisition module 4 when no cigarette is placed in the heating chamber 2.

[0058] As can be seen, in this embodiment, when it is not necessary to move the electromagnetic coil 3 to improve the heating efficiency of the electromagnetic heating smoke appliance, the drive device 5 is controlled to stop running, so that the electromagnetic coil 3 stops moving, thereby reducing the energy consumption of the electromagnetic heating smoke appliance.

[0059] As an optional embodiment, the parameter acquisition module 4 includes:

[0060] The sensor is located inside the housing 1 and is used to collect the magnetic field strength of the alternating magnetic field.

[0061] The parameter conversion module is connected to the sensor and is used to convert the magnetic field strength into an electrical signal. The value of the electrical signal is positively correlated with the magnetic field strength, and the electrical signal is voltage / current.

[0062] Correspondingly, when the magnetic field strength is less than the preset magnetic field strength, the driving device 5 controls the electromagnetic coil 3 to move within the housing 1 until the new magnetic field strength reaches the preset magnetic field strength, including:

[0063] When the electrical signal is less than the preset electrical signal threshold, the electromagnetic coil 3 is controlled by the drive device 5 to move inside the housing 1 until the new electrical signal reaches the preset electrical signal threshold. The preset electrical signal threshold corresponds to the preset magnetic field strength.

[0064] In this embodiment, the parameter acquisition module 4 includes a sensor and a parameter conversion module. The sensor is used to acquire the magnetic field strength of the alternating magnetic field. The acquired magnetic field strength is converted into an electrical signal by the parameter conversion module. If the electrical signal is a voltage, since the value of the electrical signal is positively correlated with the magnetic field strength, when the magnetic field strength is relatively large, the corresponding voltage value is also relatively large, and when the magnetic field strength is relatively small, the corresponding voltage value is also relatively small. If the electrical signal is a current, since the value of the electrical signal is positively correlated with the magnetic field strength, when the magnetic field strength is relatively large, the corresponding current value is also relatively large, and when the magnetic field strength is relatively small, the corresponding current value is also relatively small.

[0065] Furthermore, if the electrical signal is voltage, when the voltage is less than a preset voltage threshold, the driving device 5 controls the electromagnetic coil 3 to move within the housing 1 until the new voltage reaches the preset voltage threshold, which corresponds to the preset magnetic field strength; if the electrical signal is current, when the current is less than a preset current threshold, the driving device 5 controls the electromagnetic coil 3 to move within the housing 1 until the new current reaches the preset current threshold, which corresponds to the preset magnetic field strength.

[0066] As can be seen, in this embodiment, the magnetic field strength of the alternating magnetic field is collected by the sensor, and the collected magnetic field strength is converted into an electrical signal by the parameter conversion module. When the electrical signal is less than the preset electrical signal threshold, the electromagnetic coil 3 is controlled to move inside the housing 1 by the driving device 5 until the new electrical signal reaches the preset electrical signal threshold, so that the heating efficiency of the electromagnetic heating smoke appliance reaches the maximum.

[0067] As an optional embodiment, the sensor is an induction coil, the inner diameter of which is smaller than the inner diameter of the heating cavity 2.

[0068] This embodiment utilizes an induction coil as a sensor, which can effectively detect magnetic field changes over a very short time. Furthermore, the inner diameter of the induction coil is smaller than that of the heating cavity 2, meaning that for the same length, the smaller inner diameter induction coil has more turns and a higher turn density, resulting in higher accuracy and sensitivity in the magnetic field strength detected by the sensor. For example, the inner diameter of the induction coil can be 0–2 mm smaller than the inner diameter of the heating cavity 2. Additionally, the length of the induction coil can range from 2 to 5 mm, and the number of turns can be greater than 10.

[0069] As can be seen, this embodiment uses an induction coil as a sensor, which can effectively detect magnetic field changes in a very short time. Moreover, the inner diameter of the induction coil is smaller than the inner diameter of the heating cavity 2, which improves the sensitivity and accuracy of collecting magnetic field strength.

[0070] As an optional embodiment, the axis of the induction coil is parallel to the axis of the electromagnetic coil 3.

[0071] Specifically, when the axis of the induction coil is parallel to the axis of the electromagnetic coil 3, the induction coil can sensitively detect the change in the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil 3, thereby improving the accuracy of the collected magnetic field strength.

[0072] As can be seen, in this embodiment, the axis of the induction coil is set parallel to the axis of the electromagnetic coil 3 so that the induction coil can sensitively detect the change in the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil 3, thereby improving the accuracy of the collected magnetic field strength.

[0073] As an optional embodiment, the central axis of the induction coil is aligned with the central axis of the electromagnetic coil 3.

[0074] Specifically, when the central axis of the induction coil is on the same line as the central axis of the electromagnetic coil 3, the axial direction of the induction coil is parallel to the axial direction of the electromagnetic coil 3. The induction coil can uniformly sense the alternating magnetic field, so as to more sensitively detect the change in the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil 3, and further improve the accuracy of the collected magnetic field strength.

[0075] As can be seen, in this embodiment, the central axis of the induction coil and the central axis of the electromagnetic coil 3 are set on the same line. The induction coil can more sensitively detect the change in the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil 3, thereby further improving the accuracy of the collected magnetic field strength.

[0076] As an optional embodiment, the induction coil is an air-core coil.

[0077] Because the interior of an air-core coil is hollow, its inductance is smaller than that of a solid coil, allowing for faster detection of changes in magnetic field strength. Furthermore, air-core coils do not experience core saturation and have low core loss at high frequencies.

[0078] As can be seen, this embodiment uses a hollow coil as an induction coil, which has good high-frequency signal characteristics.

[0079] As an optional embodiment, the electromagnetic coil 3 is controlled to move within the housing 1 by the driving device 5 until the new magnetic field strength reaches the preset magnetic field strength, including:

[0080] The electromagnetic coil 3 is controlled by the drive device 5 to move in the first preset direction inside the housing 1;

[0081] During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, the electromagnetic coil 3 is controlled to move in the opposite direction of the first preset direction; if the difference between the new magnetic field strength and the preset magnetic field strength decreases, the electromagnetic coil 3 is controlled to continue moving in the first preset direction.

[0082] If, during the movement along a movable path in the first preset direction or the opposite direction, the new magnetic field strength reaches the preset magnetic field strength, the control electromagnetic coil 3 stops moving.

[0083] If, during the movement along a movable path in the first preset direction or the opposite direction, the new magnetic field strength never reaches the preset magnetic field strength, the first position with the smallest difference between the new magnetic field strength and the preset magnetic field strength is determined.

[0084] The electromagnetic coil 3 is controlled to continue moving in the second preset direction from the first position.

[0085] During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, the electromagnetic coil 3 is controlled to move in the opposite direction of the second preset direction; if the difference between the new magnetic field strength and the preset magnetic field strength decreases, the electromagnetic coil 3 is controlled to continue moving in the second preset direction.

[0086] If, during the movement along a movable path in the second preset direction or the opposite direction, the new magnetic field strength reaches the preset magnetic field strength, the control electromagnetic coil 3 stops moving.

[0087] If the first preset direction is the axial direction of the electromagnetic coil 3, then the second preset direction is the radial direction of the electromagnetic coil 3; if the first preset direction is the radial direction of the electromagnetic coil 3, then the second preset direction is the axial direction of the electromagnetic coil 3.

[0088] Specifically, since the first preset direction can be axial and radial, the second preset direction can be radial and axial. Therefore, the control module 6 controls the electromagnetic coil 3 to move inside the housing 1 through the drive device 5 until the new magnetic field strength reaches the preset magnetic field strength. There are two specific implementation methods.

[0089] In the first specific embodiment, if the first preset direction is axial and the second preset direction is radial, the driving device 5 controls the electromagnetic coil 3 to move axially within the housing 1. During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, it indicates that the direction of axial movement is incorrect, and the electromagnetic coil 3 is controlled to move in the opposite direction of the axial direction. If the difference between the new magnetic field strength and the preset magnetic field strength decreases, it indicates that the direction of axial movement is correct, and the electromagnetic coil 3 continues to move axially. If, during the movement along the movable path in the axial or opposite direction, the new magnetic field strength reaches the preset magnetic field strength, it indicates that the heating efficiency of the electromagnetic heating appliance has reached its maximum, and the electromagnetic coil 3 is controlled to stop moving. If, during the movement along the movable path in the axial or opposite direction, the new magnetic field strength reaches the preset magnetic field strength, it indicates that the heating efficiency of the electromagnetic heating appliance has reached its maximum, and the electromagnetic coil 3 stops moving. If the field strength never reaches the preset magnetic field strength, it indicates that the electromagnetic coil 3 needs to be moved radially to determine the first position where the difference between the new magnetic field strength and the preset magnetic field strength is minimized. The electromagnetic coil 3 is then controlled to continue moving radially from this first position. During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, it indicates that the radial movement direction is incorrect, and the electromagnetic coil 3 is controlled to move in the opposite radial direction. If the difference between the new magnetic field strength and the preset magnetic field strength decreases, it indicates that the radial movement direction is correct, and the electromagnetic coil 3 continues to move radially. If, during the movement along the movable path in the radial or opposite radial direction, the new magnetic field strength reaches the preset magnetic field strength, it indicates that the heating efficiency of the electromagnetic heating appliance has reached its maximum, and the electromagnetic coil 3 is controlled to stop moving.

[0090] In the second specific embodiment, if the first preset direction is radial and the second preset direction is axial, the driving device 5 controls the electromagnetic coil 3 to move radially within the housing 1. During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, it indicates that the radial movement direction is incorrect, and the electromagnetic coil 3 is controlled to move in the opposite radial direction. If the difference between the new magnetic field strength and the preset magnetic field strength decreases, it indicates that the radial movement direction is correct, and the electromagnetic coil 3 continues to move radially. If, during the movement along the movable path in the radial or opposite radial direction, the new magnetic field strength reaches the preset magnetic field strength, it indicates that the heating efficiency of the electromagnetic heating appliance has reached its maximum, and the electromagnetic coil 3 is controlled to stop moving. If, during the movement along the movable path in the radial or opposite radial direction, the new magnetic field strength reaches the preset magnetic field strength, it indicates that the heating efficiency of the electromagnetic heating appliance has reached its maximum, and the electromagnetic coil 3 stops moving. If the field strength does not reach the preset magnetic field strength, it indicates that the electromagnetic coil 3 needs to be moved axially to determine the first position where the difference between the new magnetic field strength and the preset magnetic field strength is minimized. The electromagnetic coil 3 is then controlled to continue moving axially from this first position. During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, it indicates that the direction of axial movement is incorrect, and the electromagnetic coil 3 is controlled to move in the opposite direction of the axial direction. If the difference between the new magnetic field strength and the preset magnetic field strength decreases, it indicates that the direction of axial movement is correct, and the electromagnetic coil 3 continues to move axially. If, during the movement along the movable path in the axial or opposite direction, the new magnetic field strength reaches the preset magnetic field strength, it indicates that the heating efficiency of the electromagnetic heating appliance has reached its maximum, and the electromagnetic coil 3 is controlled to stop moving.

[0091] It should be noted that the driving device 5 can move the electromagnetic coil 3 along the axial direction of the electromagnetic coil 3 by a preset axial distance, for example, 0 to 3 mm. That is, the driving device 5 can move the electromagnetic coil 3 along the electromagnetic coil 3 toward the lip end of the electromagnetic heating appliance by a distance of 0 to 3 mm, and can return to its original position in the opposite direction. The driving device 5 can move the electromagnetic coil 3 along at least one radial direction of the electromagnetic coil 3 and its opposite direction by a preset radial distance, for example, 0 to 3 mm, and can return to its original position.

[0092] As can be seen, the control module 6 controls the electromagnetic coil 3 to move in one of the axial or radial directions within the housing 1 through the drive device 5 until the new magnetic field strength reaches the preset magnetic field strength. If the new magnetic field strength does not reach the preset magnetic field strength, the first position is determined to be the position where the difference between the new magnetic field strength and the preset magnetic field strength is the smallest. Then, the drive device 5 controls the electromagnetic coil 3 to continue moving in the other direction, either axial or radial, from the first position until the new magnetic field strength reaches the preset magnetic field strength, so that the heating efficiency of the electromagnetic heating smoke appliance reaches the maximum.

[0093] The present invention also provides an electromagnetic heating system, including a cigarette and an electromagnetic heating smoking device as described above, wherein the cigarette includes a smoke-generating section and a ferromagnetic element disposed within the smoke-generating section.

[0094] Specifically, the electromagnetic heating system includes a cigarette and an electromagnetic heating device. When the cigarette is inserted into the heating chamber 2 of the electromagnetic heating device, the electromagnetic coil 3 of the device can move radially and axially along the coil 3, placing the ferromagnetic element of the cigarette at the position of maximum magnetic field strength, thus ensuring optimal electromagnetic heating effect. It should be noted that the ferromagnetic element has specific permeability and resistivity, and can be either sheet-like or rod-like.

[0095] Furthermore, for an introduction to the electromagnetic heating system provided by the invention, please refer to the above-described embodiment of the electromagnetic heating smoke appliance; the invention will not be repeated here.

[0096] As can be seen, in this embodiment, the parameter acquisition module 4 collects the magnetic field strength of the alternating magnetic field generated by the electromagnetic coil 3 in the heating chamber 2. When a cigarette is placed in the heating chamber 2, the magnetic field strength collected by the parameter acquisition module 4 is the magnetic field strength at the location of the ferromagnetic element in the cigarette. Then, when the magnetic field strength at the location of the ferromagnetic element in the cigarette is less than the preset magnetic field strength, the control module 6 controls the electromagnetic coil 3 to move in the housing 1 through the drive device 5 until the new magnetic field strength is the preset magnetic field strength. At this time, the ferromagnetic element in the cigarette is at the center of the alternating magnetic field, so as to achieve the maximum heating efficiency of the electromagnetic heating cigarette and improve the user's satisfaction.

[0097] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0098] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic heating smoking article, characterized by, include: The housing has a heating chamber located at one end of the electromagnetic heating smoke appliance for holding a cigarette stick; An electromagnetic coil is disposed inside the housing and also disposed on the outer wall of the heating cavity. The electromagnetic coil is connected to alternating current and is used to generate an alternating magnetic field in the heating cavity using the alternating current. A parameter acquisition module is disposed inside the housing and is used to acquire the magnetic field strength inside the heating cavity; A driving device, wherein the driving device is connected to the electromagnetic coil; A control module, connected to the drive device, is used to control the electromagnetic coil to move within the housing when the magnetic field strength is less than a preset magnetic field strength, until the new magnetic field strength reaches the preset magnetic field strength.

2. The electromagnetic heating smoking set of claim 1, wherein, The driving device is also connected to the parameter acquisition module. The control module is specifically used to control the electromagnetic coil and the parameter acquisition module to move synchronously within the housing when the magnetic field strength is less than the preset magnetic field strength, until the magnetic field strength reaches the preset magnetic field strength.

3. The electromagnetic heating smoking set of claim 1, wherein, The control module is also used to control the drive device to stop operating when the magnetic field strength is a preset blank magnetic field strength; The preset blank magnetic field strength is the magnetic field strength collected by the parameter acquisition module when the heating chamber is not filled with the cigarette.

4. The electromagnetic heating smoking set of claim 1, wherein, The parameter acquisition module includes: A sensor, disposed within the housing, is used to collect the magnetic field strength of the alternating magnetic field; A parameter conversion module, connected to the sensor, is used to convert the magnetic field strength into an electrical signal. The value of the electrical signal is positively correlated with the magnetic field strength, and the electrical signal is voltage / current. Accordingly, when the magnetic field strength is less than the preset magnetic field strength, the driving device controls the electromagnetic coil to move within the housing until the new magnetic field strength reaches the preset magnetic field strength, including: When the electrical signal is less than a preset electrical signal threshold, the driving device controls the electromagnetic coil to move within the housing until a new electrical signal reaches the preset electrical signal threshold, which corresponds to the preset magnetic field strength.

5. The electromagnetic heating smoking set of claim 4, wherein, The sensor is an induction coil, and the inner diameter of the induction coil is smaller than the inner diameter of the heating cavity.

6. The electromagnetic heating smoking article of claim 5, wherein, The axis of the induction coil is parallel to the axis of the electromagnetic coil.

7. The electromagnetic heating smoking article of claim 6, wherein, The central axis of the induction coil is on the same line as the central axis of the electromagnetic coil.

8. The electromagnetic heating smoking set of claim 5, wherein, The induction coil is an air coil.

9. The electromagnetic heating smoking article of any one of claims 1 to 8, wherein, The electromagnetic coil is controlled to move within the housing by the driving device until the new magnetic field strength reaches the preset magnetic field strength, including: The driving device controls the electromagnetic coil to move in a first preset direction within the housing; During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, the electromagnetic coil is controlled to move in the opposite direction of the first preset direction; if the difference between the new magnetic field strength and the preset magnetic field strength decreases, the electromagnetic coil is controlled to continue moving in the first preset direction. If, during the movement along a movable path in the first preset direction or the opposite direction of the first preset direction, the new magnetic field strength reaches the preset magnetic field strength, the electromagnetic coil is controlled to stop moving. If, during the movement along a movable path in the first preset direction or the opposite direction of the first preset direction, the new magnetic field strength never reaches the preset magnetic field strength, the first position with the smallest difference between the new magnetic field strength and the preset magnetic field strength is determined. The electromagnetic coil is controlled to continue moving in a second preset direction, starting from the first position. During the movement, if the difference between the new magnetic field strength and the preset magnetic field strength increases, the electromagnetic coil is controlled to move in the opposite direction of the second preset direction; if the difference between the new magnetic field strength and the preset magnetic field strength decreases, the electromagnetic coil is controlled to continue moving in the second preset direction. If, during the movement along a movable path in the second preset direction or the opposite direction of the second preset direction, the new magnetic field strength reaches the preset magnetic field strength, the electromagnetic coil is controlled to stop moving. If the first preset direction is the axial direction of the electromagnetic coil, then the second preset direction is the radial direction of the electromagnetic coil; if the first preset direction is the radial direction of the electromagnetic coil, then the second preset direction is the axial direction of the electromagnetic coil.

10. An electromagnetic heating system, characterized by, Includes a cigarette stick and an electromagnetically heated smoking appliance as described in any one of claims 1 to 9, wherein the cigarette stick includes a smoke-generating section and a ferromagnetic element disposed within the smoke-generating section.

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