Aerosol-generating device with inductively actuated airflow pump

Abstract

This invention relates to an aerosol generating apparatus, comprising a matrix chamber for receiving an aerosol forming matrix. Furthermore, the aerosol generating apparatus includes an induction-actuated airflow pump. The pump is fluidly connected to the matrix chamber. The pump is configured to pump air into the matrix chamber. The invention also relates to a method for removing excess moisture from the aerosol generating apparatus.

Description

Technical Field

[0001] This invention relates to an aerosol generating apparatus. It also relates to a method for removing excess moisture from the aerosol generating apparatus. Background Technology

[0002] An aerosol generating apparatus for generating inhalable vapors is known. Such an apparatus heats an aerosol forming matrix to a temperature that causes one or more components of the aerosol forming matrix to volatilize without burning the aerosol forming matrix. The aerosol forming matrix can be provided as part of an aerosol generating article. The aerosol generating article can have a strip shape for inserting the aerosol generating article into a matrix cavity (such as a heating chamber) of the aerosol generating apparatus. Heating elements can be arranged in or around the heating chamber to heat the aerosol forming matrix once the aerosol generating article is inserted into the heating chamber of the aerosol generating apparatus. In humid environments, an undesirable warm initial inhalation may occur due to the high moisture content in the aerosol generating matrix of the aerosol generating article. Summary of the Invention

[0003] It is desirable to have an aerosol generating device that prevents unwanted warm first inhalation in humid environments.

[0004] According to embodiments of the present invention, an aerosol generation apparatus may be provided, comprising a matrix cavity for receiving an aerosol forming matrix. Furthermore, the aerosol generation apparatus may include an induction-actuated gas flow pump. The pump may be fluidly connected to the matrix cavity. The pump may be configured to pump air into the matrix cavity.

[0005] According to embodiments of the present invention, an aerosol generation apparatus is provided, comprising a matrix cavity for receiving an aerosol forming matrix. Furthermore, the aerosol generation apparatus includes an induction-actuated airflow pump. The pump is fluidly connected to the matrix cavity. The pump is configured to pump air into the matrix cavity.

[0006] The pump enables the generation of airflow within the matrix cavity. This airflow within the matrix cavity creates a pumping effect. The airflow within the matrix cavity can be used to remove unwanted humid air or aerosols from the matrix cavity. Particularly in humid environments, the aerosol-forming matrix of the aerosol-generating article can have higher than normal humidity. This can be particularly problematic if the packaging of the aerosol-generating article has been opened for several hours before use in the aerosol-generating apparatus. For example, a user might insert a new aerosol-generating article into the matrix cavity. The aerosol-forming matrix of this aerosol-generating article may have humidity that will lead to an initial suction of unwanted heat, as the increased humidity must be removed from the aerosol-forming matrix. During the preheating period, the present invention enables a suction or pumping effect to be generated within the matrix cavity and thus within the aerosol-generating article via a pump. The suction or pumping effect can generate an airflow through the aerosol-forming matrix of the aerosol-generating article and thus remove humid air / aerosols from the aerosol-generating article. After removing humid air / aerosols, users can optimally utilize aerosol-generated products without experiencing an unwanted hot first puff.

[0007] The aerosol generating device can signal the user to indicate the end of the preheating phase. For example, acoustic, tactile, or optical signals can be provided by the aerosol generating device to signal the end of the preheating phase. The user may want to remove excess moisture from the matrix cavity when the aerosol generating device indicates the end of the preheating phase. Alternatively or additionally, the aerosol generating device can be configured to generate an excess moisture removal signal during the preheating phase, thereby instructing the user when to perform a pumping action.

[0008] The aerosol generation apparatus may include a humidity sensor in or adjacent to the matrix chamber, the humidity sensor being used to determine the moisture content of the aerosol-forming matrix in the aerosol-generating article. The controller of the aerosol generation apparatus may control signal generation based on the output of a moisture detector. Alternatively, the controller may be configured to perform an automatic excess moisture removal process based on the output of the moisture detector.

[0009] The aerosol generating device may include a printed circuit board. The printed circuit board can control the pump.

[0010] The aerosol generating apparatus may include a main air inlet. During use, ambient air can be drawn into the aerosol generating apparatus via the main air inlet, preferably into the matrix cavity. An airflow channel may extend through the matrix cavity. Ambient air can be drawn into the aerosol generating apparatus, enter the matrix cavity through the airflow channel, and be drawn toward the user. Downstream of the matrix cavity, a mouthpiece may be disposed, or the user may directly inhale onto the aerosol-generating article. The airflow channel may extend through the mouthpiece.

[0011] The pump can be configured to pump ambient air into the intake airflow channel in a downstream direction, thereby creating a pumping action in the matrix cavity. The pump can also be configured to pump ambient air into the intake airflow channel in an upstream direction, thereby creating a suction action in the matrix cavity. Activation of the pump can produce a pumping action followed by a suction action, or vice versa.

[0012] The pump can be an induction-actuated airflow pump. The pump may include a conductor surrounding, or being surrounded by, a movable magnet with a static magnetic field. When power is supplied to the conductor, a magnetic field can be generated around it. The magnetic field can interact with the static magnetic field of the movable magnet. The interaction between the conductor's magnetic field and the static magnetic field can produce a force acting on the movable magnet. This resulting force can be repulsive or attractive. The resulting force can be used to cause displacement of the movable magnet within the pump. The movement of the movable magnet can generate airflow from the surrounding environment into the pump and from the pump into the matrix cavity.

[0013] The pump may include a movable magnet. The movable magnet may be received within the pump. The movable magnet may be a permanent magnet. The movable magnet may include a first element and a second element. The first element may be a permanent magnet. The first element may be an electromagnet. The second element may be a non-magnetic element. The second element may be a ferromagnetic element. The first element including the permanent magnet may be mounted on the second element. The second element may be configured to be movable relative to the rest of the pump. The second element may be configured as one or more guide elements as described in more detail below.

[0014] A movable magnet may include a third element. A movable magnet may include several elements.

[0015] The movable magnet is movable relative to the matrix cavity. The movable magnet is movable parallel to the longitudinal central axis of the matrix cavity.

[0016] A movable magnet may include a permanent magnet and one or more non-magnetic elements. The movable magnet may include a permanent magnet and ferromagnetic elements. The permanent magnet may be enclosed in a magnetic structure. The magnetic structure may be ferromagnetic. The magnetic structure may amplify the static magnetic field generated by the permanent magnet. The magnetic structure may include or be composed of flux concentrators.

[0017] The pump may include an induction coil. A conductor may be configured as an induction coil. The pump may include an induction coil and a movable magnet. The induction coil may be arranged at least partially around the movable magnet. The induction coil may be arranged completely around the movable magnet. Alternatively, the movable magnet may be arranged at least partially around the induction coil. The movable magnet may be arranged completely around the induction coil.

[0018] An induction coil can be configured to inductively move a movable magnet when power is supplied to the induction coil. When power is supplied to the induction coil, a magnetic field is generated around it. The magnetic field of the induction coil can interact with the static magnetic field of the movable magnet, which may cause displacement of the movable magnet. Preferably, an alternating current is supplied to the induction coil to generate an alternating magnetic field around it.

[0019] The matrix cavity of the aerosol generating apparatus may have an open end into which the aerosol-generated article is inserted. The open end may be a proximal end. The matrix cavity may have a closed end opposite the open end. The closed end may be the base of the matrix cavity. The closed end may be closed except for providing air vents disposed in the base. The base of the matrix cavity may be flat. The base of the matrix cavity may be circular. The base of the matrix cavity may be located upstream of the matrix cavity. The open end may be located downstream of the matrix cavity. The matrix cavity may have an elongated extension. The matrix cavity may have a longitudinal central axis. The longitudinal direction may be a direction extending along the longitudinal central axis between the open end and the closed end. The longitudinal central axis of the matrix cavity may be parallel to the longitudinal axis of the aerosol generating apparatus.

[0020] The matrix cavity can be configured as a heating chamber. The matrix cavity can have a cylindrical shape. The matrix cavity can have a hollow cylindrical shape. The matrix cavity can have a shape corresponding to the shape of the aerosol-generated article to be received in the matrix cavity. The matrix cavity can have a circular cross-section. The matrix cavity can have an elliptical or rectangular cross-section. The matrix cavity can have an inner diameter corresponding to the outer diameter of the aerosol-generated article.

[0021] A pump may include a pumping chamber. The pumping chamber may define a volume. The pumping chamber may define a volume enclosed by a pump housing.

[0022] Alternatively, the pumping chamber may define the volume in which air is compressed or expanded. The pumping chamber may define the volume in which pump actuation occurs. The pumping chamber may be partially or completely sealed around by means of sealing elements described in more detail below. The pumping chamber may also include other elements.

[0023] The pump may include at least one pumping chamber. The pump may include more than one pumping chamber. The pump may include multiple pumping chambers. The pumping chamber may include a first chamber. The pumping chamber may include a second chamber. The first chamber and the second chamber may be fluidly separated from each other. Alternatively and preferably, a one-way valve may be arranged between the first chamber and the second chamber. The one-way valve may allow airflow from the second chamber into the first chamber. The one-way valve may prevent airflow from the first chamber into the second chamber. The first chamber may be fluidly connected to the matrix cavity. The second chamber may preferably be fluidly separated from the matrix cavity by means of a one-way valve.

[0024] The pumping chamber may be arranged at least partially around the matrix chamber. The pumping chamber may be arranged completely around the matrix chamber.

[0025] The pump can be positioned upstream of the matrix cavity. Specifically, it can be positioned upstream of the matrix cavity, particularly near the base of the matrix cavity. The pump can be positioned upstream of the matrix cavity, particularly adjacent to the base of the matrix cavity. The pump can be positioned near the base of the matrix cavity, wherein connecting elements can connect the pump to the base of the matrix cavity. The connecting elements can be part of the pump.

[0026] The pumping chamber may include a first end. The pumping chamber may include a second end. The second end may be arranged opposite to the first end. The first end of the pumping chamber may be connected to the base of the matrix chamber. The first end of the pumping chamber may be connected to the base of the matrix chamber via a connecting element. The first end of the pumping chamber may be close to the base of the matrix chamber. The second end of the pumping chamber may be arranged on the opposite side of the pumping chamber away from the base of the matrix chamber.

[0027] The pump may include a first orifice for pressure balancing. The pump may include a second orifice for pressure balancing. The pump may include several orifices for pressure balancing. The first and second orifices may be arranged within the pump housing. The first and second orifices may be arranged at a first end of the pumping chamber. The first and second orifices may be arranged at a second end of the pumping chamber. One or both of the first and second orifices may allow ambient air to be drawn into the pump, preferably into the second chamber of the pump.

[0028] The pumping cavity may have a hollow cylindrical shape. The pumping cavity may have a hollow truncated conical shape. The pumping cavity may have a shape corresponding to the shape of the movable magnet to be received in the pumping cavity. The pumping cavity may have a circular cross-section. The pumping cavity may have an elliptical or rectangular cross-section. The pumping cavity may have an annular cross-section. The pumping cavity may have an inner diameter corresponding to the outer diameter of the matrix cavity. The pumping cavity may have a circular shape. The pumping cavity may have an annular shape. The pumping cavity may be tubular. The pumping cavity may be tubular and preferably surround the matrix cavity.

[0029] A movable magnet can be received within the pump, preferably within the pumping chamber. The movable magnet can be configured to be movable within the pumping chamber. The movable magnet can be configured to move within the pumping chamber to allow air to move through the pumping chamber. The movable magnet can act as a piston within the pumping chamber. The movable magnet can push air into the matrix chamber with each complete movement.

[0030] The pumping chamber can be fluidly connected to the matrix chamber. The pumping chamber can be fluidly connected to the matrix chamber via an airflow channel. The pumping chamber can be fluidly connected to the matrix chamber via an orifice. The pumping chamber can be fluidly connected to the matrix chamber via a connecting element.

[0031] The pumping chamber can be fluidly connected to the matrix chamber via a first check valve. The first check valve can be located at the distal end of the aerosol generating device. The first check valve can be located at the distal end of the aerosol generating device. The first check valve can be located within the matrix chamber. The first check valve can be located at the first end of the pumping chamber. The first check valve can be located at the second end of the pumping chamber. The first check valve can be located downstream of the pumping chamber.

[0032] The first check valve allows airflow from the pumping chamber into the matrix chamber. The first check valve also prevents airflow from the matrix chamber into the pumping chamber. The first check valve allows airflow from the pumping chamber into the matrix chamber when the pump is actuated.

[0033] The pumping chamber can be fluidly connected to the surrounding environment via a second check valve. The second check valve can be located within the air inlet of the aerosol generating device. This air inlet can be configured as a pump air inlet. The pump air inlet can allow only airflow into the pump. The second check valve can be located at the distal end of the aerosol generating device. The second check valve can be located upstream of the pumping chamber.

[0034] The second check valve allows airflow from the surrounding environment into the pumping chamber. The second check valve also prevents airflow from the pumping chamber into the surrounding environment.

[0035] The movement of the movable magnet pressurizes the pumping chamber, thereby forcing air into the matrix chamber. The movement of the movable magnet can also create a vacuum in the pumping chamber, thereby drawing air from the surrounding environment into the pumping chamber.

[0036] A movable magnet can be configured to move parallel to the longitudinal central axis of the matrix cavity. The longitudinal central axis of the matrix cavity is also referred to as the longitudinal axis of the matrix cavity. The movable magnet can be configured to move in a first direction parallel to the longitudinal axis of the matrix cavity. The movable magnet can be configured to move in a second direction parallel to the longitudinal axis of the matrix cavity. The movable magnet can be configured to move in a second direction parallel to the longitudinal axis of the matrix cavity and opposite to the first direction. The first direction can be a proximal axial direction. The second direction can be a distal axial direction.

[0037] A movable magnet can be configured to move along the longitudinal central axis of the pumping cavity. The longitudinal central axis of the pumping cavity is also referred to as the longitudinal axis of the pumping cavity. The longitudinal axis of the pumping cavity can be parallel to or along the longitudinal axis of the matrix cavity. The longitudinal axis of the pumping cavity can be aligned with the longitudinal axis of the matrix cavity. The movable magnet can be configured to move in a first direction along the longitudinal axis of the pumping cavity. The movable magnet can be configured to move in a second direction along the longitudinal axis of the pumping cavity. The movable magnet can be configured to move in a second direction along the longitudinal axis of the pumping cavity and opposite to the first direction. The first direction can be a proximal axial direction. The second direction can be a distal axial direction.

[0038] A movable magnet can be configured to be movable in a first direction along the longitudinal axis of the pumping chamber, wherein movement of the movable magnet in the first direction pressurizes the pumping chamber. Movement of the movable magnet in the first direction forces air into the matrix chamber. Movement of the movable magnet in a second direction causes the pumping chamber to expand. Expansion of the pumping chamber draws air from the surrounding environment into the pumping chamber.

[0039] The first chamber can be fluidly connected to the matrix chamber via a first one-way valve. The first chamber can be fluidly connected to the second chamber via a second one-way valve. The second chamber can be fluidly connected to the surrounding environment via a pump air inlet.

[0040] Alternatively, the airflow can extend from the ambient environment through the first chamber into the matrix cavity. The airflow may not extend through the second chamber. The first chamber may be fluidly connected to the ambient environment via a second check valve preferably arranged in the pump air inlet. The first chamber may be fluidly connected to the matrix cavity via a first check valve. The second check valve may allow airflow from the ambient environment into the first chamber. The second check valve may prevent air from flowing back from the first chamber into the ambient environment. The first check valve may allow airflow from the first chamber into the matrix cavity. The first check valve may prevent air from flowing back from the matrix cavity into the first chamber. The second chamber may include a first orifice and a second orifice for pressure equalization.

[0041] The movable magnet may include a first guiding element. The movable magnet may include a second guiding element. The first guiding element may be disposed radially inside the permanent magnet. The second guiding element may be disposed radially outside the permanent magnet. The permanent magnet may be received between the first guiding element and the second guiding element.

[0042] The first guiding element can be tubular. The second guiding element can be tubular. The second guiding element can have a larger diameter than the first guiding element. This allows a permanent magnet to be received between the first and second guiding elements. The permanent magnet can be tubular.

[0043] The first guiding element may be magnetic. The first guiding element may not be magnetic. The first guiding element may be ferromagnetic. The second guiding element may be magnetic. The second guiding element may not be magnetic. The second guiding element may be ferromagnetic. The first and second guiding elements may not be magnetic. The first and second guiding elements may be ferromagnetic. The first and second guiding elements may be magnetic.

[0044] The first guiding element may include a first surface. The first surface of the first guiding element may face a first end of the pumping chamber. The first guiding element may include a second surface. The second surface of the first guiding element may face a second end of the pumping chamber.

[0045] The first guiding element may include a groove. The groove may extend from a second surface of the first guiding element to a first surface of the guiding element, preferably extending parallel to the longitudinal axis of the pumping chamber. The groove may be cylindrical. The groove may be tubular. The groove may be any suitable shape. The first guiding element may include at least one groove. The first guiding element may include more than one groove. The first guiding element may include several grooves.

[0046] The groove can receive a protrusion. The protrusion can be attached to a second end of the pumping cavity. The protrusion can be attached to a second end of the pumping cavity facing the second surface of the first guiding element (preferably facing the groove). The second end of the pumping cavity may include more than one protrusion. The protrusion can act as an axial guide for the movable magnet.

[0047] The movable magnet can be tubular. It can be received within a tubular pumping chamber. The movable magnet can have any shape suitable for the pumping chamber.

[0048] Pumps may include resilient sealing elements. Resilient sealing elements may be elastic. Resilient sealing elements may be flexible. Resilient sealing elements may be air-impermeable. Resilient sealing elements may be liquid-impermeable. Resilient sealing elements may be membranes.

[0049] A resilient sealing element can seal around the pumping chamber. A resilient sealing element can seal around the pumping chamber and the first check valve. A resilient sealing element can seal around the pumping chamber, the first check valve, and the second check valve. The resilient sealing element can be a diaphragm that can seal around the pumping chamber, the first check valve, and the second check valve.

[0050] A resilient sealing element may be attached to a first end of the pumping chamber. A resilient sealing element may be attached to a first surface of a first guide element. A resilient sealing element may be attached to a first end of the pumping chamber. A resilient sealing element may be attached to both the first end of the pumping chamber and the first surface of the first guide element. The resilient sealing element may sealably surround the pumping chamber, the first check valve, and the second check valve.

[0051] A resilient sealing element can fluidly separate the pumping chamber from the interior of the aerosol generating device, excluding the matrix chamber. The membrane can be circular. The membrane can be annular. The membrane can have any shape suitable for separating the pumping chamber from the interior of the aerosol generating device, excluding the matrix chamber. Separating the pumping chamber from the interior of the aerosol generating device, excluding the matrix chamber, can generate a more efficient airflow during pump actuation, thereby improving energy efficiency.

[0052] The aerosol generating apparatus may further include a first biasing element. The first biasing element may be flexible. The first biasing element may be attached to a first end of the pumping chamber. The first biasing element may be attached to a first surface of a first guiding element. The first biasing element may be attached to both the first end of the pumping chamber and the first surface of the first guiding element. The first biasing element may bias a movable magnet. Preferably, the first biasing element may bias the movable magnet toward a second end of the pumping chamber.

[0053] A first biasing element can be configured to bias the movable magnet in the opposite direction of movement induced by the induction coil. The induction coil can move the movable magnet from a first position along the longitudinal axis of the pumping chamber to a second position. The first biasing element applies a bias force to the movable magnet, biasing it toward the first position. If the bias force exceeds the magnetic force induced by the induction coil, the movable magnet can move to its first position. During operation, the induction coil can move the movable magnet from the first position to the second position. When the movable magnet reaches the second position, the polarity of the alternating current supplied to the induction coil can be switched so that the induction coil no longer pushes the movable magnet toward the second position. Subsequently, the first biasing element pushes the movable magnet back to the first position.

[0054] The aerosol generating apparatus may further include a second biasing element. The second biasing element may be attached to a second end of the pumping chamber. The second biasing element may be attached to a second surface of the first guiding element. The second biasing element may bias a movable magnet toward a first end of the pumping chamber. The second biasing element may be flexible. The second biasing element may bias the movable magnet toward a second position. The average biasing force applied by the second biasing element may be less than the average biasing force applied by the first biasing element. In other words, the second biasing element may be weaker than the first biasing element. The additional use of the second biasing element can improve the control of pump actuation.

[0055] The second biasing element can be configured to bias the movable magnet in the opposite direction to the biasing direction of the first biasing element. The biasing force of the second biasing element can be oriented in the same direction as the induced force applied by the induction coil, thereby supporting the induction coil to move the movable magnet. This reduces the electrical energy required to move the movable magnet and thus minimizes the energy consumption of the aerosol generating device.

[0056] The induction coil can be configured to move the movable magnet at a frequency corresponding to the resonant frequency of one or both of the first and second bias elements. This resonant frequency can be the frequency of the alternating current supplied to the induction coil. Moving the movable magnet at a frequency corresponding to the resonant frequency of one or both of the first and second bias elements can increase the control of pump actuation and thereby improve energy efficiency.

[0057] One or both of the first biasing element and the second biasing element can be configured as springs. The first biasing element can be configured as a spring. The second biasing element can be configured as a spring. The first biasing element and the second biasing element can each be configured as springs. The first biasing element can be configured as a first spring. The second biasing element can be configured as a second spring. The first spring may have a higher spring stiffness than the second spring. The second spring may have a higher spring stiffness than the first spring. The first spring may have the same spring stiffness as the second spring.

[0058] The first bias element can be arranged near the movable magnet, and the second bias element can be arranged far from the movable magnet.

[0059] The first biasing element may be surrounded by a sealing element. The second biasing element may be surrounded by a sealing element. Both the first and second biasing elements may be surrounded by sealing elements. The first biasing element may not be surrounded by a sealing element. The second biasing element may not be surrounded by a sealing element.

[0060] Neither the first nor the second bias element should be surrounded by a sealing element. The advantages of this design, in which the resilient sealing element does not surround the bias element, include an increase in the volume of the pumping chamber, improved airflow within the pumping chamber, and the spring not coming into contact with the aerosol.

[0061] An induction coil can be configured as a unidirectional coil or a bidirectional coil. A unidirectional coil can also be referred to as a single coil. A single coil may include a first portion and a second portion, wherein the first portion is wound in a first direction and the second portion is wound in a second direction opposite to the first direction. A single coil having a first portion and a second portion wound in opposite directions can also be referred to as a double coil. A first coil and a second coil arranged in parallel can also be referred to as a double coil, wherein the first coil is wound in a first direction and the second coil is wound in a second direction opposite to the first direction.

[0062] The induction coil can be configured as a dual-coil system, where both coils can be operated by the same power supply. Alternatively, each coil of the dual-coil system can be operated by a separate power supply. The two coils of the dual-coil system can be arranged in parallel. The coils of the dual-coil system can be arranged concentrically. The two coils of the dual-coil system can be arranged in series.

[0063] The induction coil can be operated with AC current, preferably with AC current having a square wave, triangular wave, sine wave, or sawtooth pattern. The induction coil can be operated with AC current via a microprocessor (preferably via an H-bridge controlled by the microprocessor).

[0064] The induction coil can be configured as a single coil, which can be operated with AC current.

[0065] Alternatively, the induction coil can be operated by DC current, preferably pulsed DC current. The induction coil can be configured as a dual-coil system, wherein both coils of the dual-coil system can be operated by the same power supply, wherein the power supply is DC, and wherein the two coils of the dual-coil system can be arranged in parallel. Alternatively, the induction coil can be configured as a dual-coil system, wherein both coils of the dual-coil system can be operated by the same power supply, wherein the power supply is DC, and wherein the two coils of the dual-coil system can be arranged in series. Each coil of the dual-coil system may include a separate DC power supply, wherein the separate power supply can be alternately activated. The separate DC power supply can be alternately activated by the controller of the aerosol generating device.

[0066] As used herein, the terms “proximal,” “distal,” “upstream,” and “downstream” are used to describe the relative position of a component or part of a component of an aerosol generating device with respect to the direction in which a user draws air over it during use of the aerosol generating device.

[0067] An aerosol generating device may include an orifice through which aerosols exit the device and are delivered to a user during use. The orifice may also be referred to as a proximal end. During use, the user inhales through the proximal end or orifice of the aerosol generating device to inhale the aerosol generated by the device. Alternatively, the user may inhale directly through an aerosol-generating article inserted into an opening at the proximal end of the aerosol generating device. The opening at the proximal end may be an opening of a matrix cavity. The matrix cavity may be configured to receive the aerosol-generating article. The aerosol generating device includes a distal end opposite the proximal end or orifice. The proximal end or orifice of the aerosol generating device may also be referred to as a downstream end, and the distal end of the aerosol generating device may also be referred to as an upstream end. Components or portions of components of the aerosol generating device may be described as being upstream or downstream of each other based on their relative position between the proximal end, downstream end, or orifice and the distal end or upstream end of the aerosol generating device.

[0068] As used herein, an "aerosol generating device" relates to an apparatus that interacts with an aerosol-forming matrix to generate an aerosol. The aerosol-forming matrix may be part of an aerosol-generating article, such as a smoking article. The aerosol generating device may be a smoking device that interacts with the aerosol-forming matrix of the aerosol-generating article to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth. The aerosol generating device may be a retainer. The device may be an electrically heated smoking device. The aerosol generating device may include a housing, a circuit system, a power supply, a heating chamber, and a heating element.

[0069] As used herein with reference to the invention, the term "smoking" in relation to apparatus, articles, systems, matrix, or otherwise does not refer to conventional smoking in which the aerosol-forming matrix is ​​completely or at least partially burned. The aerosol-generating apparatus of the present invention is arranged to heat the aerosol-forming matrix to a temperature below the combustion temperature of the aerosol-forming matrix but at or above the temperature at which one or more volatile compounds of the aerosol-forming matrix are released to form an inhalable aerosol.

[0070] The aerosol generating device may include a circuit system. The circuit system may include a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of a controller. The circuit system may include additional electronic components. The circuit system may be configured to regulate the power supply to a heating element. Power may be supplied continuously to the heating element after the aerosol generating device is activated, or it may be supplied intermittently, such as based on inlet-outlet suction. Power may be supplied to the heating element in the form of current pulses. The circuit system may be configured to monitor the resistance of the heating element and preferably control the power supply to the heating element based on the resistance of the heating element.

[0071] The aerosol generating device may include a power source, typically a battery, within the body of the device. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery such as a lithium-cobalt, lithium-iron-phosphate, lithium titanate, or lithium-polymer battery. Alternatively, the power source may be another form of charge storage device, such as a capacitor. The power source may require recharging and may have a capacity sufficient to store enough energy for one or more uses; for example, the power source may have sufficient capacity to continuously generate aerosols for periods of approximately six minutes or multiples of six minutes. In another instance, the power source may have sufficient capacity to provide intermittent activation of the suction or heating element for a predetermined number of times.

[0072] In any aspect of this disclosure, the heating element may comprise a resistive material. Suitable resistive materials include, but are not limited to: semiconductors (such as doped ceramics), electrically “conductive” ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may comprise doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, platinum, gold, and silver. Examples of suitable metal alloys include stainless steel, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, gold-containing alloys, iron-containing alloys, and superalloys based on nickel, iron, cobalt, stainless steel, Timetal®, and iron-manganese-aluminum based alloys. In composite materials, the resistive material may optionally be embedded in, encapsulated in, or coated with an insulating material, or vice versa, depending on the energy transfer kinetics and desired external physicochemical properties.

[0073] As described, in any of the aspects of this disclosure, the heating element may be part of an aerosol generating apparatus. The aerosol generating apparatus may include an internal heating element, an external heating element, or both, wherein “internal” and “external” refer to the aerosol forming matrix. The internal heating element may take any suitable form. For example, the internal heating element may take the form of a heating blade. Alternatively, the internal heater may take the form of a sleeve or substrate with different conductive portions, or a resistance metal tube. Alternatively, the internal heating element may be one or more heating needles or rods extending through the center of the aerosol forming matrix. Other alternatives include heating wires or filaments, such as Ni-Cr (nickel-chromium), platinum, tungsten, or alloy wires, or heating plates. Optionally, the internal heating element may be deposited in or on a rigid carrier material. In one such embodiment, the resistance heating element may be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary apparatus, the metal may be formed as a rail on a suitable insulating material (such as a ceramic material) and then sandwiched in another insulating material (such as glass). Heaters formed in this way can be used to both heat and monitor the temperature of the heating element during operation.

[0074] The external heating element can take any suitable form. For example, it can take the form of one or more flexible heating foils on a dielectric substrate (such as polyimide). The flexible heating foil can be shaped to conform to the periphery of the matrix cavity. Alternatively, the external heating element can take the form of a metal mesh or multiple metal meshes, a flexible printed circuit board, a molded interconnect device (MID), a ceramic heater, a flexible carbon fiber heater, or can be formed on a suitable shaped substrate using coating techniques (such as plasma vapor deposition). The external heating element can also be formed using a metal with a defined relationship between temperature and resistivity. In such an exemplary device, the metal can be formed as a rail between two layers of suitable insulating material. An external heating element formed in this way can be used to both heat and monitor the temperature of the external heating element during operation.

[0075] As an alternative to resistance heating elements, heating elements can be configured as induction heating elements. Induction heating elements can include an induction coil and a sensor. Generally, the sensor is a material capable of generating heat when penetrated by an alternating magnetic field. When located in an alternating magnetic field, if the sensor is conductive, eddy currents are typically induced by the alternating magnetic field. If the sensor is magnetic, another effect that typically contributes to heating is often referred to as hysteresis loss. Hysteresis loss occurs primarily due to the movement of magnetic domain blocks within the sensor, as the magnetic orientation of these domain blocks aligns with the alternating magnetic field. Another effect contributing to hysteresis loss is when magnetic domains grow or shrink within the sensor. Typically, all these changes occurring in the sensor at the nanoscale or below are referred to as "hysteresis loss" because they generate heat within the sensor. Therefore, if the sensor is both magnetic and conductive, both hysteresis loss and eddy current generation contribute to heating the sensor. If the sensor is magnetic but non-conductive, hysteresis loss will be the only means of heating the sensor when penetrated by an alternating magnetic field. According to the invention, the sensor can be conductive or magnetic, or both. An alternating magnetic field generated by one or more induction coils heats the sensor, which then transfers the heat to the aerosol-forming matrix, causing aerosol formation. Heat transfer can be primarily via thermal conduction. This heat transfer is optimal if the sensor is in close thermal contact with the aerosol-forming matrix.

[0076] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming matrix capable of releasing volatile compounds that can form aerosols. For example, an aerosol-generating article can be a smoking article that generates aerosols that can be inhaled directly into the lungs of a user through their mouth. Aerosol-generating articles can be disposable.

[0077] As used herein, the term "aerosol forming matrix" refers to a matrix capable of releasing one or more volatile compounds that can form aerosols. Such volatile compounds can be released by heating the aerosol forming matrix. The aerosol forming matrix may suitably be part of an aerosol-generating article or a smoking article.

[0078] The aerosol forming matrix can be a solid aerosol forming matrix. It can include both solid and liquid components. The aerosol forming matrix can include tobacco-containing materials containing volatile tobacco flavor compounds released from the matrix upon heating. The aerosol forming matrix can also include non-tobacco materials. Furthermore, the aerosol forming matrix can include aerosol forming agents that contribute to the formation of dense and stable aerosols. Examples of suitable aerosol forming agents are glycerol and propylene glycol.

[0079] The aerosol-generating matrix preferably comprises: homogenized tobacco material, an aerosol forming agent, and water. Providing homogenized tobacco material can improve aerosol generation, nicotine content, and aroma characteristics of aerosols generated during the heating of aerosol-generating articles. Specifically, the process of manufacturing homogenized tobacco involves grinding tobacco leaves, which more effectively releases nicotine and aroma upon heating.

[0080] The present invention also relates to a method for removing excess moisture from an aerosol generating device as described herein, wherein the method includes actuating a pump before the user experience of the aerosol generating device.

[0081] The following is a non-exhaustive list of non-limiting examples. Any one or more features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0082] Example 1. An aerosol generating device, the aerosol generating device comprising:

[0083] Matrix cavity for receiving aerosol-forming matrix,

[0084] Induction-actuated airflow pump

[0085] The pump is fluidly connected to the matrix cavity, and the pump is configured to pump air into the matrix cavity.

[0086] Example 2. The aerosol generating apparatus according to Example 1, wherein the pump includes a movable magnet.

[0087] Example 3. An aerosol generating apparatus according to Example 2, wherein the pump includes an induction coil arranged at least partially around the magnet.

[0088] Example 4. An aerosol generating apparatus according to Example 3, wherein the induction coil is configured to inductively move the movable magnet when power is supplied to the induction coil.

[0089] Example 5. An aerosol generating apparatus according to any of the foregoing examples, wherein the pump includes a pumping chamber.

[0090] Example 6. An aerosol generating apparatus according to Example 5, wherein the pumping chamber is fluidly connected to the matrix chamber via a first one-way valve.

[0091] Example 7. An aerosol generating apparatus according to Example 6, wherein the first one-way valve allows airflow from the pumping chamber to the matrix chamber.

[0092] Example 8. An aerosol generating apparatus according to any one of Examples 5 to 7, wherein the pumping chamber is fluidly connected to the surrounding environment via a second check valve.

[0093] Example 9. An aerosol generating apparatus according to Example 8, wherein the second one-way valve allows airflow from the surrounding environment to the pumping chamber.

[0094] Example 10. An aerosol generating apparatus according to any one of Examples 4 and 5 to 9, wherein the movement of the movable magnet pressurizes the pumping chamber, thereby forcing air into the matrix chamber.

[0095] Example 11. An aerosol generating apparatus according to any of the preceding examples, wherein the movable magnet of Example 2 is configured to be movable parallel to the longitudinal axis of the matrix cavity.

[0096] Example 12. According to the aerosol generating apparatus of Example 11, the movable magnet further includes a first guiding element and a second guiding element, wherein the first guiding element is arranged radially inside the permanent magnet and the second guiding element is arranged radially outside the permanent magnet.

[0097] Example 13. An aerosol generating apparatus according to any of the preceding examples, wherein the movable magnet of Example 2 is tubular.

[0098] Example 14. An aerosol generating apparatus according to any of the preceding examples, wherein the pump includes a resilient sealing element.

[0099] Example 15. An aerosol generating apparatus according to Example 14, wherein the resilient sealing element sealably surrounds the pumping chamber of Example 5.

[0100] Example 16. An aerosol generating apparatus according to Example 15, wherein the resilient sealing element fluidly separates the pumping chamber from the internal interior of the aerosol generating apparatus, excluding the matrix chamber.

[0101] Example 17. An aerosol generating apparatus according to any of the preceding examples, wherein the aerosol generating apparatus further includes a first bias element.

[0102] Example 18. An aerosol generating apparatus according to Example 17, wherein the first biasing element is configured to bias the movable magnet of Example 2 in the opposite direction of movement induced by the induction coil of Example 4.

[0103] Example 19. An aerosol generating apparatus according to any of the preceding examples, wherein the aerosol generating apparatus further includes a second bias element.

[0104] Example 20. An aerosol generating apparatus according to Example 19, wherein the second biasing element is configured to bias the movable magnet of Example 2 in the opposite direction to the biasing direction of the first biasing element of Example 17.

[0105] Example 21. An aerosol generating apparatus according to any of the preceding examples, wherein the induction coil of Example 3 is configured to move the movable magnet at a frequency corresponding to the resonant frequency of one or both of the first bias element of Example 17 and the second bias element of Example 19.

[0106] Example 22. An aerosol generating apparatus according to any of the preceding examples, wherein one or both of the first biasing element of Example 17 and the second biasing element of Example 19 are configured as springs.

[0107] Example 23. An aerosol generating apparatus according to any of the preceding examples, wherein the first biasing element of Example 17 is arranged near the movable magnet of Example 2, and the second biasing element of Example 19 is arranged far from the movable magnet.

[0108] Example 24. An aerosol generating apparatus according to any of the preceding examples, wherein the induction coil of Example 3 is configured as a unidirectional coil or a bidirectional coil.

[0109] Example 25. A method for removing excess moisture from an aerosol generating device according to any of the preceding examples, wherein the method includes actuating the pump prior to the user experience of the aerosol generating device.

[0110] Example 26. Use of an induction-actuated gas flow pump according to any of the foregoing examples for an aerosol generating apparatus, wherein the aerosol generating apparatus is configured to vaporize an aerosol generating matrix to generate an aerosol, and wherein preferably, when the induction-actuated gas flow pump is activated, the generated aerosol is released from the aerosol generating apparatus via the induction-actuated gas flow pump.

[0111] Example 27. The use of the induction-actuated gas pump according to Example 26, wherein the generated aerosol includes one or more of odors, flavors, or pharmaceuticals.

[0112] Example 28. The aerosol generating device is portable, according to the application of the induction-actuated airflow pump of Example 27.

[0113] Example 29. According to the application of the induction-actuated airflow pump of Example 28, the aerosol generating device is a handheld device.

[0114] Example 30. The use of the induction-actuated airflow pump according to Example 29, wherein the aerosol is a drug that the user can preferably inhale without aspiration.

[0115] Example 31. According to the application of the induction-actuated airflow pump of Example 27, the aerosol generating device can be mounted on a surface.

[0116] Example 32. According to the application of the induction-actuated airflow pump of Example 31, the surface is part of the interior of a building, preferably one of a wall, ceiling or floor.

[0117] Example 33. The application of the induction-actuated airflow pump according to Example 31, wherein the surface is part of the interior of a vehicle, preferably the interior of an automobile.

[0118] Example 34. The use of the induction-actuated airflow pump according to any of the foregoing examples, wherein the aerosol is released as an odor, preferably as an air freshener.

[0119] Example 35. The use of a sensor-actuated airflow pump according to any of the foregoing examples, wherein the sensor-actuated airflow pump is activated by a user, preferably by one of a button, interface or switch.

[0120] Example 36. The use of the induction-actuated airflow pump according to Examples 31 to 35, wherein the aerosol generating device is part of the vehicle interior and is preferably activated by the user via vehicle controls.

[0121] Example 37. The use of the induction-actuated airflow pump according to Example 31, wherein the aerosol is released as an odor, preferably the odor is repellent to insects.

[0122] The features described with respect to one embodiment can also be applied to other embodiments of the invention. Attached Figure Description

[0123] The invention will be further described by way of example only with reference to the accompanying drawings, in which:

[0124] Figure 1 A cross-sectional side view of an embodiment of the aerosol generation apparatus is shown;

[0125] Figure 2 It shows Figure 1 Top view of the aerosol generating device;

[0126] Figure 3 An embodiment of an induction-actuated airflow pump is shown;

[0127] Figure 4 An embodiment of an induction-actuated airflow pump is shown;

[0128] Figure 5 An embodiment of an induction-actuated airflow pump is shown. Detailed Implementation

[0129] Figure 1 An aerosol generating apparatus 10 is shown. The aerosol generating apparatus 10 includes a matrix chamber 12 for receiving an aerosol-generating article comprising an aerosol-forming matrix. The matrix chamber 12 is disposed at a proximal end 14 of the aerosol generating apparatus 10. A main air inlet 18 is disposed at a distal end 16 of the aerosol generating apparatus 10. The main air inlet 18 allows ambient air to be drawn into the matrix chamber 12. When a user inhales at the proximal end 14 of the aerosol-generating article, air is drawn from the surrounding environment into the matrix chamber 12 and subsequently inhaled by the user through the aerosol-generating article received in the matrix chamber 12.

[0130] also, Figure 1 A printed circuit board 20 and an inductively actuated airflow pump 22 are shown. The pump 22 is formed by a pump housing 24 arranged around a sidewall 26 of a matrix cavity 12. The volume within the pump housing 24 defines a pumping chamber 28. A membrane 30 is arranged to divide the pumping chamber 28 into a first chamber 32 and a second chamber 34.

[0131] The first chamber 32 is fluidly connected to the matrix cavity 12 via a first one-way valve 36. The first one-way valve 36 allows airflow toward the matrix cavity 12 and prevents airflow from the matrix cavity 12 into the first chamber 32. The first one-way valve 36 is disposed in the side wall 26 of the matrix cavity 12. The first chamber 32 is also fluidly connected to the second chamber 34 via a second one-way valve 38. The second one-way valve 38 allows airflow from the second chamber 34 to the first chamber 32 and prevents backflow from the first chamber 32 to the second chamber 34.

[0132] The second chamber 34 is fluidly connected to the surrounding environment via a pipe 40 having a pump air inlet 42. The pump air inlet 42 is located at the distal end 16 of the aerosol generating device 10.

[0133] The pumping chamber 28 is tubular, and a tubular movable magnet 44 is arranged within the pumping chamber 28. The movable magnet 44 includes a permanent magnet 46 and a magnetic structure 48 surrounding the permanent magnet 46. The movable magnet 44 is parallel to the longitudinal axis L of the matrix cavity 12. s It is movable.

[0134] The movable magnet 44 is biased toward the distal end 16 of the aerosol generating device 10 by a first biasing element in the form of a spring disk 50.

[0135] An induction coil, in the form of a single coil 52, is wound around the sidewall 26 of the matrix cavity 12. The single coil 52 is arranged between the sidewall 26 of the matrix cavity 12 and the movable magnet 44.

[0136] When AC current is supplied from the power source (not shown) of the aerosol generating device 10, the AC current is fed to a single coil 52, which generates a magnetic field. The magnetic field of the single coil 52 interacts with the permanent magnetic field of the permanent magnet 46, generating a magnetic force. The magnetic force is applied to a movable magnet 44 such that the movable magnet 44 moves along the longitudinal axis L of the matrix cavity 12. S The aerosol generating device 10 is displaced towards its proximal end 14. Simultaneously, the spring disk 50 applies an elastic force opposite to the magnetic force to the movable magnet 44.

[0137] The movement of the movable magnet 44 stops once the elastic force exceeds the magnetic force or when the polarity of the AC current changes. In this case, the movable magnet 44 is displaced toward the distal end 16 of the aerosol generating device 10 by means of the spring plate 50.

[0138] When a constant power supply is provided, the displacement direction of the movable magnet 44 continuously alternates, causing the movable magnet 44 to reciprocate.

[0139] The displacement of the movable magnet 44 toward the proximal end 14 of the aerosol generating device 10 causes the second chamber 34 to expand. As a result, a vacuum is generated inside the second chamber 34, which draws air from the surrounding environment into the second chamber 34 through the pump air inlet 42 and the pipe 40.

[0140] The subsequent movement of the movable magnet 44 toward the distal end 16 of the aerosol generating device 10 forces air from the second chamber 34 into the first chamber 32 through the second one-way valve 38.

[0141] As the reciprocating motion occurs, the movable magnet 44 moves again toward the proximal end 14 of the aerosol generating device 10, thereby forcing air from the first chamber 32 into the matrix chamber 12 through the first one-way valve 36.

[0142] Figure 2 Shown from the top view Figure 1A cross-section of an embodiment. This view shows a portion of a first chamber 32, which is separated from a second chamber 34 via a membrane 30. A single coil 52 is wound around a matrix cavity 12. A permanent magnet 46, surrounded by a magnetic structure 48, surrounds the single coil 52 while being radially spaced from it. Due to the reciprocating movement of the movable magnet 44, airflow is forced from the second chamber 34 ( Figure 2 (Not depicted in the text) Enter the first room 32.

[0143] Figure 3 An embodiment of an induction-actuated airflow pump 22 is shown. The pump 22 is fluidly connected to the matrix cavity 12 via a connecting element 54. A pumping cavity 28 includes a first end 56 and a second end 58. The first end 56 of the pumping cavity 28 is adjacent to the connecting element 54. The second end 58 of the pumping cavity 28 is arranged in the opposite direction away from the connecting element 54.

[0144] The pumping chamber 28 is tubular and arranged around the sidewall 26 of the matrix chamber 12. The tubular pumping chamber 28 receives a tubular movable magnet 44. The movable magnet 44 includes a permanent magnet 46 sandwiched between a first guide element 60 and a second guide element 62. The movable magnet 44 is parallel to the longitudinal axis L of the pumping chamber 28. P It is movable.

[0145] A first guiding element 60 is arranged around the sidewall 26 of the matrix cavity 12. The first guiding element 60 includes a first surface 64 facing a first end 56 of the pumping cavity 28 and a second surface 66 facing a second end 58 of the pumping cavity 28. A second guiding element 62 contacts the pump housing 24. In addition, a permanent magnet 46 is enclosed within a magnetic structure 48.

[0146] and Figure 1 Compared to the previous embodiment, Figure 3 The movable magnet 44 is surrounded by an induction coil 68. In particular, the induction coil 68 is configured as a double coil 68 wound around the pump housing 24.

[0147] Pump 22 includes a first orifice 70 for pressure balancing and a second orifice 72 for pressure balancing arranged in the second end 58 of pumping chamber 28.

[0148] Pump 22 includes a first check valve 36 and a second check valve 38 at a first end 56 of pumping chamber 28. The first check valve 36 allows airflow from pumping chamber 28 into matrix chamber 12 via connecting element 54. Additionally, matrix chamber 12 includes a main air inlet 18 through which air is forced into matrix chamber 12 from the surrounding environment during pumping. The second check valve 38 is arranged in pump air inlet 42 and allows airflow from the surrounding environment into pumping chamber 28.

[0149] During use, electricity is supplied to the dual coil 68, which generates a magnetic field around it. The magnetic field of the permanent magnet 46 interacts with the magnetic field generated by the dual coil 68, producing a magnetic force. This magnetic force displaces the movable magnet 44 toward the first end 56 of the pumping chamber 28 to pressurize it. Subsequently, airflow is forced through the first one-way valve 36 and the connecting element 54 into the matrix chamber 12.

[0150] Switching the polarity of the current causes a reversal of the magnetic field of the double coil 68. The interaction between the reversed magnetic field of the double coil 68 and the static magnetic field of the permanent magnet 46 redirects the magnetic force in the opposite direction, thereby displacing the movable magnet 44 toward the second end 58 of the pumping chamber 28. The movement of the movable magnet 44 toward the second end 58 of the pumping chamber 28 creates a vacuum within the pumping chamber 28. Due to the vacuum, air is forced from the surrounding environment into the pumping chamber 28 through the second one-way valve 38. The periodic switching of the current polarity causes the movable magnet 44 to reciprocate.

[0151] Figure 4 It shows Figure 3 A variation of the embodiment. In this example, pump 22 includes a resilient sealing element in the form of a diaphragm 30. The diaphragm 30 is attached to a first surface 64 of a first guide element 60 and to a first end 56 of a pumping chamber 28. The diaphragm 30 sealably surrounds the pumping chamber 28, a first check valve 36, a second check valve 38, and the first surface 64 of the first guide element 60. Additionally, Figure 4 In the embodiment, the induction coil is a single coil 52 wound around one half of the pump 22 housing and arranged near the first end 56 of the pumping chamber 28. Similar to... Figure 1 Implementation examples, Figure 4 The movable magnet 44 is displaced due to the supply of power (specifically AC current) to the single coil 52. Airflow extends through the pumping chamber 28 within the membrane 30. The displacement of the movable magnet 44 toward the first end 56 of the pumping chamber 28 compresses the membrane 30. This compression forces air from the pumping chamber 28 within the membrane 30 into the matrix chamber 12 via the first one-way valve 36. The displacement of the movable magnet 44 toward the second end 58 of the pumping chamber 28 causes the membrane 30 to expand. This expansion draws air from the surrounding environment into the pumping chamber 28 within the membrane 30.

[0152] Figure 5 An embodiment of an inductively actuated airflow pump 22 is shown. The pump 22 is disposed at the distal end 16 of a matrix cavity 12. A pumping chamber 28 is fluidly connected to the distal end 16 of the matrix cavity 12 via a connecting element 54. The pumping chamber 28 includes a first end 56 and a second end 58. The first end 56 of the pumping chamber 28 is disposed adjacent to the connecting element 54, and the second end 58 of the pumping chamber 28 is disposed away from the connecting element 54.

[0153] Pump 22 includes a pump housing 24. An induction coil, particularly near its first end 56 of the pumping chamber 28, is wound as a single coil 52 around the pumping housing 26. The pumping chamber 28 receives a movable magnet 44, which is located along the longitudinal axis L of the pumping chamber 28. P Movable. In this example, the longitudinal axis of the pumping chamber 28 is aligned with the longitudinal axis L of the matrix chamber 12. S (This is not depicted) Alignment.

[0154] The movable magnet 44 includes a permanent magnet 46 sandwiched between a first guide element 60 and a second guide element 62. The movable magnet 44 includes a magnetic structure 48 surrounding the permanent magnet 46. The first guide element 60 is arranged radially at its center within the pumping cavity 28 and includes a first surface 64 and a second surface 66. The first surface 64 of the first guide element 60 faces a first end 56 of the pumping cavity. The second surface 66 of the first guide element 60 faces a second end 58 of the pumping cavity 28. A recess 80 extends from the first surface 64 of the first guide element 60 to the second surface 66 of the first guide element 60. The recess 80 is aligned with the longitudinal axis of the pumping cavity 28. The recess 80 is configured to receive a similarly shaped protrusion 82. The protrusion 82 is attached to the second end 58 of the pumping cavity 28. The protrusion 82 is aligned with the longitudinal axis L of the pumping cavity 28. P Alignment, and along the longitudinal axis L of the pumping chamber 28 P The second surface 66 extends toward the first guiding element 60.

[0155] The second guide element 62 contacts the pump housing 24.

[0156] Furthermore, the pumping chamber 28 includes two biasing elements in the form of a first spring 76 and a second spring 78. The first spring 76 is attached to a first end 56 of the pumping chamber 28 and to a first surface 64 of the first guide element 60. The first spring 76 biases a movable magnet 44 toward the proximal end 14 of the pumping chamber 28. The second spring 78 is attached to a second end 58 of the pumping chamber 28 and to a second surface 66 of the first guide element 60. The second spring 78 biases a movable magnet 44 toward the second end 58 of the pumping chamber 28. The first spring 76 and the second spring 78 each include a compressed state and an extended state. When the first spring 76 is compressed, the second spring 78 extends, and vice versa.

[0157] Similar to Figure 4 Implementation examples, Figure 5 The pump includes a membrane 30 attached to a first end 56 of the pumping chamber 28 and to a first surface 64 of a first guide element 60. The membrane 30 surrounds a first check valve 36, a second check valve 38, and a portion of the proximal half of the pumping chamber 28.

[0158] A first check valve 36 is arranged radially at the center of the first end 56 of the pumping chamber 28. A second check valve 38 is also arranged in the first end 56 of the pumping chamber 28, but radially spaced from the first check valve 36. The first check valve 36 is fluidly connected to the matrix chamber 12. A main air inlet 18 is arranged orthogonally to the matrix chamber 12. The main air inlet 18 is fluidly connected to the matrix chamber 12 and the surrounding environment. When a user draws air at the proximal end (not shown) of the aerosol-generated article, air is drawn from the surrounding environment into the matrix chamber 12 via the main air inlet 18.

[0159] When power is supplied, the single coil 52 generates a magnetic field, which interacts with the static magnetic field of the permanent magnet 46 and produces a magnetic force acting on the movable magnet 44. Combined with the elastic forces of the first spring 76 and the second spring 78, the movable magnet 44 oscillates in a reciprocating motion. This reciprocating motion produces a pumping effect. Similar to... Figures 1 to 4 In one embodiment, the displacement of the movable magnet 44 toward the first end 56 of the pumping chamber 28 pressurizes the pumping chamber 28, thereby forcing air into the matrix chamber 12 through the first one-way valve 36. Due to the expansion of the pumping chamber 28, the displacement of the movable magnet 44 toward the second end 58 of the pumping chamber 28 creates a vacuum within the pumping chamber 28. The vacuum within the pumping chamber 28 draws air from the surrounding environment into the pumping chamber 28 through the second one-way valve 38.

[0160] In addition, the pump 22 includes a first orifice 70 for pressure balancing and a second orifice 72 for pressure balancing arranged in the pump housing 24.

Claims

1. An aerosol generating apparatus, the aerosol generating apparatus comprising: Matrix cavity for receiving aerosol-forming matrix, Induction-actuated airflow pump The pump is fluidly connected to the matrix cavity, and the pump is configured to pump air into the matrix cavity.

2. The aerosol generating apparatus according to claim 1, wherein the pump includes a movable magnet.

3. The aerosol generating apparatus of claim 2, wherein the pump includes an induction coil arranged at least partially around the magnet.

4. The aerosol generating apparatus according to claim 3, wherein the induction coil is configured to inductively move the movable magnet when power is supplied to the induction coil.

5. The aerosol generating apparatus according to any one of the preceding claims, wherein the pump includes a pumping chamber.

6. The aerosol generating apparatus according to claim 5, wherein the pumping chamber is fluidly connected to the matrix chamber via a first one-way valve.

7. The aerosol generating apparatus according to any one of claims 5 or 6, wherein the pumping chamber is fluidly connected to the surrounding environment via a second check valve.

8. The aerosol generating apparatus according to any one of claims 4 and 5 to 7, wherein the movement of the movable magnet pressurizes the pumping chamber, thereby forcing air into the matrix chamber.

9. The aerosol generating apparatus according to any one of the preceding claims, wherein the pump includes a resilient sealing element.

10. The aerosol generating apparatus according to any one of the preceding claims, wherein the aerosol generating apparatus further comprises a first bias element.

11. The aerosol generating apparatus of claim 10, wherein the first biasing element is configured to bias the movable magnet of claim 2 in the opposite direction of movement induced by the induction coil of claim 4.

12. The aerosol generating apparatus according to any one of the preceding claims, wherein the aerosol generating apparatus further comprises a second bias element.

13. The aerosol generating apparatus according to any one of the preceding claims, wherein the induction coil of claim 3 is configured to move the movable magnet at a frequency corresponding to the resonant frequency of one or both of the first bias element of claim 10 and the second bias element of claim 12.

14. The aerosol generating apparatus according to any one of the preceding claims, wherein the induction coil of claim 3 is configured as a unidirectional coil or a bidirectional coil.

15. A method for removing excess moisture from an aerosol generating apparatus according to any one of the preceding claims, wherein the method comprises actuating the pump prior to the user experience of the aerosol generating apparatus.

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