WO2024092581A1 - Aerosol generating device and microwave heating assembly thereof - Google Patents

Abstract

A microwave heating assembly (100), comprising an outer conductor unit (11), a microwave matching structure (12) and a microwave feed-in unit (2). The outer conductor unit (11) is cylindrical and comprises an open end (112), a closed end (111), and a cavity positioned between the open end (112) and the closed end (111). The microwave matching structure (12) comprises a conductor post (121) and a connecting rod (122), wherein the conductor post (121) is arranged in the cavity and is in ohmic contact with the outer conductor unit (11); and the connecting rod (122) comprises a first end and a second end opposite the first end, the first end being bonded to an outer peripheral wall of the conductor post (121). The microwave feed-in unit (2) comprises an outer conductor (21) and an inner conductor (22), wherein the outer conductor (21) is mounted on the outer conductor unit (11) and is in ohmic contact with the outer conductor unit (11); and the inner conductor (22) extends into the cavity and is connected to the second end of the connecting rod (122). Further provided is an aerosol generating device.

Description

Aerosol generating device and microwave heating component thereof Technical Field

The present invention relates to the field of electronic atomization, and in particular to an aerosol generating device and a microwave heating component thereof.

Background technique

In the related art, the microwave heating component of the aerosol generating device needs to rely on a microwave feeding unit to feed microwaves into it. The microwave feeding unit and the microwave heating component must be physically connected, and the connection efficiency and reliability between them affect the heating efficiency and heating reliability of the entire microwave heating component.

At present, the physical connection method is generally that the inner conductor of the microwave feeding unit extends into the interior of the microwave heating component and directly contacts the outer peripheral wall of the conductor column of the microwave heating component. However, the current at the contact point and the nearby wall is relatively large, which will cause serious ohmic loss; after working for a period of time, the contact between the inner conductor and the conductor column will deteriorate, and the reliability will be reduced.

technical problem

The technical problem to be solved by the present invention is to provide an improved aerosol generating device and a microwave heating component thereof.

Technical Solutions

The technical solution adopted by the present invention to solve the technical problem is: construct a microwave heating component for an aerosol generating device, comprising:

The outer conductor unit is in a cylindrical shape and includes an open end and a closed end opposite to each other, and a cavity located between the open end and the closed end;

Microwave matching structure, including:

A conductor post is disposed in the cavity and is in ohmic contact with the outer conductor unit; and

A connecting rod, comprising a first end and a second end opposite to the first end, wherein the first end is coupled to the outer peripheral wall of the conductor column;

as well as,

The microwave feeding unit comprises:

an outer conductor mounted on the outer conductor unit and in ohmic contact with the outer conductor unit; and

The inner conductor extends into the cavity and is connected to the second end of the connecting rod.

In some embodiments, the first end is integrally combined with the conductor post.

In some embodiments, the first end is welded to the conductor post.

In some embodiments, the connecting rod is a straight rod, which is connected to the outer peripheral wall of the conductor column along a direction perpendicular to the axial direction of the conductor column.

In some embodiments, it is characterized in that the inner conductor includes a feeding end, and an end surface of the feeding end is in ohmic contact with an end surface of the second end.

In some embodiments, the connecting rod is provided with a socket, and the socket extends from the end surface of the second end toward the conductor column; the inner conductor includes a feeding end, and the feeding end is inserted into the socket and is in ohmic contact with the inner wall surface of the socket.

In some embodiments, the feeding end is in elastic ohmic contact with the jack.

In some embodiments, a conductive elastic sleeve is provided in the socket; the elastic sleeve is cylindrical, and its outer circumference is in contact with the inner circumference of the socket, and the inner diameter of the elastic sleeve is slightly larger than or equal to the diameter of the feeding end; the feeding end is inserted into the elastic sleeve and is tightly against the inner wall of the elastic sleeve.

In some embodiments, the insertion hole is a blind hole, and the bottom of the hole of the insertion hole is relatively located in the conductor column.

In some embodiments, a feeding hole connecting the cavity with the outside is provided on the side wall of the outer conductor unit, and the outer conductor is embedded in the feeding hole; the plug hole is opposite to the feeding hole.

In some embodiments, the inner conductor is coaxially disposed in the outer conductor, and the microwave feeding unit further includes a dielectric layer, wherein the dielectric layer is between the outer conductor and the inner conductor.

In some embodiments, the outer conductor unit is cylindrical, comprising an open end opposite to the open end and a closed end opposite to the open end, and the cavity is located between the open end and the closed end;

The conductor column includes a fixed end and a free end opposite to the fixed end, the fixed end is fixed on the end wall of the closed end, and the free end extends toward the open end.

In some embodiments, the microwave matching structure further includes a conductor disk axially coupled to the free end, and a diameter of the conductor disk is greater than a diameter of the conductor column.

In some embodiments, the microwave matching structure further includes a probe device in a longitudinal shape, one end of which is inserted into the conductor disk and is in ohmic contact with the conductor disk.

In some embodiments, the conductor disk, the conductor post, the probe device and the outer conductor unit are coaxial.

In some embodiments, the microwave heating assembly further comprises a receiving seat mounted on the outer conductor unit, the receiving seat comprising a receiving portion for receiving the aerosol generating product, and the receiving portion is disposed in the cavity.

The present invention also constructs an aerosol generating device, including a microwave generating device and the above-mentioned microwave heating component, wherein the microwave feeding unit is connected to the microwave generating device.

Beneficial Effects

The implementation of the present invention has the following beneficial effects: the present invention provides a connecting rod extending toward the feed hole on the outer peripheral side wall of the conductor column, so that the inner conductor makes ohmic contact with the connecting rod, and the contact point of the inner conductor is far away from the place where the wall current is relatively large, thereby reducing ohmic loss.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

FIG1 is a schematic diagram of the external structure of a microwave heating assembly in one embodiment of the present invention;

FIG2 is a longitudinal structural cross-sectional view of the microwave heating assembly shown in FIG1 ;

FIG3 is a longitudinal structural cross-sectional view of the microwave heating assembly shown in FIG1 in a disassembled state;

4 is a schematic structural diagram of a microwave matching structure of an embodiment of the present invention omitting a probe device;

FIG5 is a longitudinal structural cross-sectional view of a microwave heating assembly in another embodiment of the present invention;

6 is a diagram showing the distribution of surface current intensity obtained by comparing the inner conductor of the microwave feeding unit directly abutting against the outer peripheral wall of the conductor column and the inner conductor abutting against the connecting rod provided on the conductor column;

7 is a surface current intensity distribution diagram corresponding to a test in which the inner conductor of the microwave feeding unit of the present invention is inserted into a jack provided in a connecting rod.

Reference numerals: microwave heating assembly 100; outer conductor unit 11; microwave matching structure 12; receiving seat 13; microwave feeding unit 2; closed end 111; open end 112; conductor side wall 113; conductor end wall 114; feeding hole 115; mounting hole 116; conductor column 121; connecting rod 122; conductor disk 123; probe device 124; screw rod 125; plug hole 126; receiving portion 131; fixing portion 132; positioning rib 133; supporting rib 134; receiving cavity 1311; through hole 1321; outer conductor 21; inner conductor 22; dielectric layer 23; connecting end 221; feeding end 222;

A second microwave heating assembly 100a; a second connecting rod 122a; and a second conductive column 121a.

Embodiments of the present invention

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

The present invention constructs an aerosol generating device, which can use microwaves to heat an aerosol generating product to generate aerosols by atomization, so as to be inhaled or inhaled by a user. In some embodiments, the aerosol generating product is a solid aerosol generating product such as a processed plant leaf product. It can be understood that in other embodiments, the aerosol generating product can also be a liquid aerosol generating product.

The aerosol generating device may include a microwave generating device (not shown) and a microwave heating assembly 100. The microwave generating device may generate microwaves; the microwave heating assembly 100 is connected to the microwave generating device to receive microwaves, and forms a microwave field in its own cavity, and the microwave field may act on the aerosol generating product to achieve microwave heating. As shown in FIG1 , the overall shape of the microwave heating assembly 100 in some embodiments is roughly cylindrical. Of course, the microwave heating assembly 100 is not limited to a cylindrical shape, and may also be in other shapes such as a square column and an elliptical column.

As shown in FIG2 , the microwave heating assembly 100 may include an outer conductor unit 11, a microwave matching structure 12, a receiving seat 13, and a microwave feeding unit 2. The outer conductor unit 11 is cylindrical, having a closed end 111 and an open end 112 opposite to the closed end 111, and may define a semi-closed cavity, which is in the shape of a straight cylinder. The microwave matching structure 12 is used to adjust the resonant frequency and microwave distribution in the cavity. It is coaxially arranged in the cavity of the outer conductor unit 11, and one end is connected to the closed end 111 of the outer conductor unit 11, and is in ohmic contact with the end wall of the closed end 111, forming the short-circuit end of the microwave heating assembly 100; the other end of the microwave matching structure 12 extends toward the open end 112 of the outer conductor unit 11, and does not contact the outer conductor unit 11, forming the open-circuit end of the microwave heating assembly 100. The receiving seat 13 is used to load the aerosol generating product, which is fixedly or detachably mounted at the open end 112 of the outer conductor unit 11; when the aerosol generating product is inserted into the receiving seat 13, it can be in the area where the microwave field is mainly formed. The microwave feeding unit 2 is used to feed the microwave generated by the microwave generating device into the cavity (the feeding method may include an electric feeding method or a magnetic feeding method; preferably an electric feeding method), and the microwave feeding unit 2 is detachably mounted on the outer peripheral wall of the outer conductor unit 11.

As shown in FIG3 , the outer conductor unit 11 may include a conductive conductor side wall 113 and a conductor end wall 114 in some embodiments. The conductor side wall 113 may be cylindrical, including two oppositely disposed ends. The conductor end wall 114 is closed on the first end of the conductor side wall 113 to form the above-mentioned closed end 111; the second end of the conductor side wall 113 is an open structure to form the above-mentioned open end 112, in which the receiving seat 13 can be installed. In addition, a radially through feeding hole 115 is provided on the conductor side wall 113 near the conductor end wall 114, and the feeding hole 115 can be used for the microwave feeding unit 2 to be inserted into the outer conductor unit 11. The aperture of the feeding hole 115 is adapted to the outer diameter of the outer conductor 21 of the microwave feeding unit 2.

An axially penetrating mounting hole 116 is also provided at the center of the conductor end wall 114 . The mounting hole 116 is used for mounting the microwave matching structure 12 thereon so as to fix one end of the microwave matching structure 12 on the conductor end wall 114 .

In some embodiments, the outer conductor unit 11 may be made of a conductive metal material, and its material may include at least one of aluminum, copper, gold, silver, and stainless steel; preferably aluminum alloy or copper. It can be understood that the outer conductor unit 11 is not limited to being made of a conductive material, and it can also be achieved by plating a first conductive coating on the inner wall of a non-conductive cylinder. The material of the first conductive coating may include gold, silver, copper, aluminum, conductive metal oxides or conductive polymers; wherein the conductive metal oxide may include ITO, AZO, AGZO and FTO materials. Preferably, the first conductive coating is a silver coating or a gold coating.

As shown in Fig. 3, in some embodiments, the microwave matching structure 12 may include a conductor column 121, a connecting rod 122 disposed on the outer peripheral wall of the conductor column 121, a conductor disk 123 disposed above the conductor column 121, and a probe device 124 embedded in the conductor disk 123 and the conductor column 121. Preferably, the axes of the conductor column 121, the conductor disk 123, the probe device 124 and the outer conductor unit 11 coincide with each other.

The conductor column 121 plays a role in microwave conduction. In some embodiments, it may be cylindrical. One end (bottom end) of the conductor column 121 away from the open end 112 of the outer conductor unit 11 is coaxially connected to the conductor end wall 114 of the outer conductor unit 11, and one end (top end) of the conductor column 121 close to the open end 112 extends toward the open end 112 of the outer conductor unit 11. The diameter of the conductor column 121 is smaller than the inner diameter of the outer conductor unit 11. It can be understood that the conductor column 121 is not limited to being cylindrical, and it can also be in other shapes such as square column, elliptical column, stepped column, irregular column, etc. In addition, the bottom end of the conductor column 121 is also provided with an axially extending screw 125, which can be installed in the mounting hole 116 located on the conductor end wall 114 of the outer conductor unit 11 to fix the conductor column 121 on the conductor end wall 114, so that a reliable ohmic contact is formed between the conductor column 121 and the outer conductor unit 11.

In some embodiments, the conductor post 121 can be made of a conductive metal material, preferably aluminum alloy or copper. It is understandable that the conductor post 121 is not limited to being made of a conductive material, and can also be achieved by plating a second conductive coating on the outer surface of a non-conductive body. The second conductive coating is preferably plated with a silver coating or a gold coating.

The connecting rod 122 plays a role in microwave conduction and is used to cooperate with the microwave feeding unit 2. In some embodiments, the connecting rod 122 is in the shape of a cylindrical straight rod, one end of which is coupled to the outer peripheral wall of the conductor column 121 in a direction perpendicular to the axial direction of the conductor column 121, and the other end of which extends in the direction of the feeding hole 115, but there is a gap between the feeding hole 115. The coupling method can be an integral coupling or an ohmic contact (such as welding). Preferably, an integral coupling method is adopted, because there is no ohmic contact between the connecting rod 122 and the conductor column 121, and when a strong current flows, the ohmic loss caused is reduced.

It can be understood that the radial cross-sectional shape of the connecting rod 122 may include a square, a triangle, a trapezoid or an irregular shape in addition to a circle, which is not specifically limited here.

In some embodiments, the connecting rod 122 can be made of a conductive metal material, preferably aluminum alloy or copper. It is understandable that the connecting rod 122 is not limited to being made of a conductive material, and can also be achieved by plating a third conductive coating on the outer surface of a non-conductive body. The third conductive coating is preferably plated with a silver coating or a gold coating.

As shown in FIG3 and FIG4, the connecting rod 122 is also provided with a plug hole 126 relative to the feeding hole 115. The plug hole 126 is used for inserting the inner conductor 22 of the microwave feeding unit 2 to achieve microwave conduction. On the other hand, it can reduce the risk of poor contact between the inner conductor 22 of the microwave feeding unit 2 and the connecting rod 122. The plug hole 126 is a blind hole in the form of a straight cylindrical channel, which axially penetrates the connecting rod 122 and radially extends to the inside of the conductor column 121; the orifice of the plug hole 126 is located on the end face of the connecting rod 122 relative to the feeding hole 115, and the bottom thereof is located inside the conductor column 121. Optionally, the aperture of the plug hole 126 is adapted to the diameter of the inner conductor 22 of the microwave feeding unit 2.

Optionally, a cylindrical, conductive elastic sleeve (not shown) may also be provided in the socket. The elastic sleeve is used to further improve the connection reliability between the inner conductor 22 of the microwave feeding unit 2 and the connecting rod 122, and is axially sleeved in the socket 126. The outer diameter of the elastic sleeve is slightly smaller than the inner diameter of the socket 126, and its outer circumference is fitted to the inner circumference of the socket 126; and the inner diameter of the elastic sleeve is slightly larger than or equal to the diameter of the inner conductor 22. When the inner conductor 22 is inserted into the socket 126, it is inserted into the hollow channel of the elastic sleeve, and at this time, the outer wall surface of the inner conductor 22 is tightly against the inner wall surface of the elastic sleeve. The elastic sleeve may be made of an elastic metal material; in some embodiments, the elastic metal material includes an elastic alloy.

In some embodiments, the conductor disk 123 is used for microwave conduction, and can also increase its own inductance and capacitance, and reduce the resonant frequency, thereby facilitating further reduction of the cavity size. The conductor disk 123 can be in the shape of a disk, and its diameter is larger than the diameter of the conductor post 121, and smaller than the inner diameter of the outer conductor unit 11. The conductor disk 123 is disposed on the top of the conductor post 121, and can be integrally combined with the conductor post 121, or can be in ohmic contact with the conductor post 121. It can be understood that the conductor disk 123 is not a necessary component of the microwave heating assembly 100, and it is applied in this embodiment as a preferred solution; in the absence of the conductor disk 123, microwave heating can also be achieved by relying on the conductor post 121 and the probe device 124.

The probe device 124 is used to adjust the microwave field distribution and the microwave feeding frequency. As an independent structure (that is, the probe device 124 is detachably connected to the conductor disk 123), it can be withdrawn from the top of the conductor disk 123/inserted into the conductor disk 123 and form an ohmic contact with the conductor disk 123.

In some embodiments, the probe device 124 may include a longitudinal probe; the lower end of the probe is inserted from the top of the conductor disk 123, coaxially embedded in the conductor disk 123, and forms a good ohmic contact with the conductor disk 123; the upper end of the probe extends upward into the receiving seat 13. It can be understood that when microwaves are fed into the microwave heating assembly 100, a microwave field will be formed around the portion of the probe device 124 extending into the receiving seat 13, and when the aerosol generating product is extended into the receiving seat 13 and inserted at the upper end of the probe, it can be heated by microwaves.

The probe device 124 may also include a temperature measuring element (not shown) disposed in the probe, which is used to monitor the internal temperature of the aerosol generating substrate inserted into the receiving seat 13 to facilitate temperature control. It can be understood that when temperature measurement is not required, the probe can be a solid structure; and when temperature measurement is required, the probe can be a hollow probe.

Optionally, the shape of the upper end of the probe may include one of a plane, a sphere, an ellipsoid, a cone or a truncated cone; a truncated cone is preferred because it can enhance the local field strength and thereby accelerate the atomization speed of the aerosol generating medium.

In some embodiments, the probe can be made of a conductive metal material, preferably stainless steel, aluminum alloy or copper. It is understandable that the probe is not limited to being made of a conductive material, and it can also be achieved by plating a fourth conductive coating on the outer surface of a non-conductive body. The fourth conductive coating may include gold, silver, copper, aluminum, a conductive metal oxide, or a conductive polymer; wherein the conductive metal oxide includes ITO, AZO, AGZO, FTO materials; preferably plated with a silver coating or a gold coating.

As shown in FIG3 , the receiving seat 13 may include a receiving portion 131 and a fixing portion 132 integrally connected to the receiving portion 131 in some embodiments. The receiving portion 131 is used to receive the aerosol generating product; the fixing portion 132 is used to axially block the open end 112 of the outer conductor unit 11 and allow the receiving portion 131 to extend into the cavity, so that the probe device 124 is disposed in the receiving portion 131.

In some embodiments, the receiving portion 131 may be cylindrical, and its outer diameter may be smaller than the inner diameter of the outer conductor unit 11. The receiving portion 131 includes an axial receiving cavity 1311 for receiving the aerosol generating product. The fixing portion 132 may be annular and coaxially connected to the receiving portion 131. The fixing portion 132 may be coaxially sealed at the open end 112 of the outer conductor unit 11 to coaxially arrange the receiving portion 131 in the cavity. The fixing portion 132 includes an axial through hole 1321 that connects the receiving cavity 1311 with the external environment, and the aerosol generating product can be inserted into the receiving cavity 1311 through the through hole 1321.

In some embodiments, the receiving seat 13 further includes a plurality of longitudinal positioning ribs 133. These positioning ribs 133 are evenly spaced and arranged on the circumference of the wall of the receiving cavity 1311 and/or the through hole 1321. Each positioning rib 133 extends in a direction parallel to the axis of the receiving seat 13. In one aspect, these positioning ribs 133 can be used to clamp the aerosol generating product inserted into the receiving cavity 1311 and/or the through hole 1321. In another aspect, a longitudinally extending air inlet channel is formed between each two adjacent positioning ribs 133 to facilitate the ambient air to be sucked into the bottom of the aerosol generating product, and then enter the aerosol generating product to take away the aerosol generated by microwave heating.

In some embodiments, the receiving seat 13 further includes a plurality of longitudinal supporting ribs 134; these supporting ribs 134 are evenly spaced and radially distributed on the bottom surface of the receiving cavity 1311. It can be understood that the supporting ribs 134 are used to support the aerosol generating matrix on one side, and form a plurality of radial second air inlet channels on the other side. These second air inlet channels are respectively connected to these first air inlet channels to facilitate the ambient air to be inhaled into the bottom of the aerosol generating matrix, and then enter the aerosol generating matrix to take away the aerosol generated by microwave heating.

In some embodiments, the receiving seat 13 can be made of polymer materials (such as polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), ppsu, pc, ABS, pp, etc.), or ceramic materials (alumina, zirconia, etc.). The receiving seat 13 can also be made of metal or glass. Of course, in engineering applications, it is preferably made of polymer materials (low cost and low thermal conductivity). The receiving seat 13 can also be made of low microwave loss, high temperature resistant and harmless materials such as PI, PEEK, and PTFE.

As shown in FIG2 , the microwave feeding unit 2 may be a coaxial connector in some embodiments, which is inserted from a feeding hole 115 located on the peripheral side of the outer conductor unit 11 and mounted on the outer conductor unit 11. The microwave feeding unit 2 includes an outer conductor 21, an inner conductor 22 disposed inside the outer conductor 21, and a dielectric layer 23 between the inner conductor 22 and the outer conductor 21.

In some embodiments, the outer conductor 21 is a straight cylindrical structure with openings at both ends; when the microwave feeding unit 2 is installed on the outer conductor unit 11, the side wall of the outer conductor 21 is in ohmic contact with the inner wall surface of the feeding hole 115 located on the outer conductor unit 11.

The inner conductor 22 is a straight needle-shaped structure, one end of which is a connection end 221, which is located inside the outer conductor 21; the other end of which is a feeding end 222, which is located outside the outer conductor 21. The connection end 221 is used to connect to a microwave generating device to access microwaves; the connection method can be a coaxial connection method or a microstrip line connection method. When the microwave feeding unit 2 is installed on the outer conductor unit 11, the feeding end 222 is relatively adjacent to the microwave matching structure 12, and can be inserted into the socket 126 of the connecting rod 122, and fit with the bottom wall surface of the socket 126. At the same time, part of the outer peripheral wall surface of the inner conductor 22 fits with the inner peripheral wall surface of the socket 126, realizing electrical coupling or magnetic coupling, thereby guiding the microwave to the microwave matching structure 12.

Referring to FIG. 5 , this figure shows a second microwave heating assembly 100a in other embodiments of the present invention; the difference between this embodiment and the above-mentioned embodiment 1 is that a second connecting rod 122a and a second conductor column 121a are used to replace the above-mentioned connecting rod 122 and conductor column 121.

In this embodiment, the second conductor post 121a may be cylindrical, and one end (bottom end) thereof away from the open end 112 of the outer conductor unit 11 is coaxially connected to the conductor end wall 114 of the outer conductor unit 11, and one end (top end) thereof close to the open end 112 extends toward the open end 112 of the outer conductor unit 11. The diameter of the second conductor post 121a is smaller than the inner diameter of the outer conductor unit 11. Similarly, a screw 125 is also provided at the bottom end of the second conductor post 121a, so that a reliable ohmic contact is formed between the second conductor post 121a and the outer conductor unit 11.

The second conductor column 121a can be made of a conductive metal material, preferably aluminum alloy or copper. Alternatively, the second conductive coating is plated on the outer surface of the non-conductive body. The second conductive coating is preferably plated with a silver coating or a gold coating.

The second connecting rod 122a is in the shape of a cylindrical straight rod. Of course, the radial cross-sectional shape of the second connecting rod 122a may include a square, a triangle, a trapezoid or an irregular shape in addition to a circle. As shown in FIG5 , one end of the second connecting rod 122a is coupled to the outer peripheral wall of the second conductor column 121a in a direction perpendicular to the axial direction of the second conductor column 121a, and the other end thereof extends in the direction of the feed hole 115, but there is a gap between the feed hole 115. The coupling method may be an integral coupling or an ohmic contact (such as welding). Preferably, an integral coupling method is adopted, because there is no ohmic contact between the second connecting rod 122a and the second conductor column 121a, so that the ohmic loss caused when a strong current flows through is reduced.

When the microwave feeding unit 2 is installed on the outer conductor unit 11, the inner conductor 22 of the microwave feeding unit 2 extends into the cavity, and the feeding end 222 of the inner conductor 22 can directly abut against the end wall of the second connecting rod 122a opposite to the feeding hole 115 to form ohmic contact.

The second connecting rod 122a can be made of a conductive metal material, preferably aluminum alloy or copper. Alternatively, it can be realized by plating a third conductive coating on the outer surface of a non-conductive body. The third conductive coating is preferably plated with a silver coating or a gold coating.

The following refers to FIG. 6 and FIG. 7 , and combines the surface current intensity distribution diagrams under different technical solutions to specifically demonstrate the role played by the above embodiments in the present invention:

As shown in FIG6 , the feeding end 222 of the inner conductor 22 abuts against the outer peripheral side wall of the conductor post 121 of the microwave matching structure 12, forming a first contact point m1 located on the outer peripheral side wall of the conductor post 121. As can be seen from FIG6 , the color at the first contact point m1 is the darkest, indicating that the surface current at the first contact point m1 is very large. From the surface current intensity data, the conduction current density of the first contact point is as high as 920A/m; it can also be seen that the surface current at the first contact point and the vicinity is relatively large, and the connection will inevitably have ohmic contact resistance, which will cause loss; after working for a period of time, the contact between the feeding end 222 and the conductor post 121 will deteriorate, and the reliability will be reduced.

As shown in FIG6 , the present invention forms a second contact point m5 by arranging a second connecting rod 122a on the outer peripheral side wall of the second conductor column 121a so that the inner conductor 22 contacts the end wall of the second connecting rod 122a opposite to the feeding hole 126; the second contact point m5 is relatively close to the feeding hole 115 relative to the first contact point m1. As can be seen from FIG6 , the color at the second contact point m2 is lighter than the color at the first contact point m1, indicating that the surface current at the second contact point m2 is relatively small. From the surface current intensity data, the conduction current density of the second contact point m5 is 367A/m. According to the power loss calculation formula I ² *R, I is the current, R is the resistance, assuming that the contact resistance of the first contact point m1 and the second contact point m5 remains unchanged, the ohmic loss of the second contact point m5 relative to the first contact point m1 is reduced to: 367 ² /920 ² =0.16. Therefore, it can be concluded that by providing the second connection rod 122a on the outer peripheral side wall of the second conductor post 121a, the ohmic loss can be sharply reduced.

As shown in FIG. 7 , the present invention provides a connecting rod 122 integrally combined with the conductor column 121 on the outer peripheral side wall thereof, and at the same time, an axially extending plug hole 126 is provided on the connecting rod 122, so that the inner conductor 22 is inserted into the plug hole 126, and the outer wall surface of the inner conductor 22 fits with the inner wall surface of the plug hole 126 to form an ohmic contact. From the surface current intensity data, the density of the strong current point is 690A/m, and the current density of the installation point is 230A/m. Due to the provision of the connecting rod 122 and the plug hole 126, the area in contact with the inner conductor 22 is greatly increased, which is 3 times the area in contact when the groove is directly opened on the conductor column 121 (in this test, the depth of the plug hole 126 is 3 times the depth of the groove). By calculation, it can be obtained that the ohmic loss is reduced to (230 ² *1/3)/690 ² =0.037. Therefore, it can be concluded that the method of providing the connecting rod 122 and the insertion hole 126 integrally combined with the conductor column 121 on the outer peripheral side wall of the present invention can further reduce the ohmic loss.

In summary, the present invention arranges a connecting rod 122 integrally connected to the outer peripheral side wall of the conductor column 121, so that the feeding end 222 of the inner conductor 22 of the microwave feeding unit 2 is away from the place with large current (the place with large current generates large heat, and the ohmic loss caused is more serious), thereby reducing the ohmic loss and improving the electrical performance and reliability of the feeding connection. It is also possible to further arrange an axial jack 126 on the connecting rod 122 to increase the contact area of the inner conductor 22 during the feeding connection, further reduce the ohmic loss, and further improve the electrical performance and reliability of the feeding connection.

It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims (17)

A microwave heating assembly for an aerosol generating device, characterized by comprising: The outer conductor unit is in a cylindrical shape and includes an open end and a closed end opposite to each other, and a cavity located between the open end and the closed end; Microwave matching structure, including: a conductor post, disposed in the cavity and in ohmic contact with the outer conductor unit; and A connecting rod, comprising a first end and a second end opposite to the first end, wherein the first end is coupled to the outer peripheral wall of the conductor column; as well as, The microwave feeding unit comprises: an outer conductor mounted on the outer conductor unit and in ohmic contact with the outer conductor unit; and The inner conductor extends into the cavity and is connected to the second end of the connecting rod. The microwave heating assembly according to claim 1, wherein the first end is integrally connected to the conductor column. The microwave heating assembly according to claim 1, wherein the first end is welded to the conductor column. The microwave heating assembly according to claim 1, characterized in that the connecting rod is a straight rod, which is connected to the outer peripheral wall of the conductor column in a direction perpendicular to the axial direction of the conductor column. The microwave heating assembly according to any one of claims 1 to 4, characterized in that the inner conductor comprises a feeding end, and an end surface of the feeding end is in ohmic contact with an end surface of the second end. The microwave heating assembly according to claim 1, characterized in that the connecting rod is provided with a plug hole, and the plug hole extends from the end surface of the second end to the conductor column; The inner conductor comprises a feeding end, which is inserted into the jack and is in ohmic contact with the inner wall surface of the jack. The microwave heating assembly according to claim 6, characterized in that the feeding end is in elastic ohmic contact with the socket. The microwave heating assembly according to claim 6 is characterized in that a conductive elastic sleeve is provided in the jack; the elastic sleeve is cylindrical, and its outer circumference is in contact with the inner circumference of the jack, and the inner diameter of the elastic sleeve is slightly greater than or equal to the diameter of the feeding end; the feeding end is inserted into the elastic sleeve and tightly abuts against the inner wall surface of the elastic sleeve. The microwave heating assembly according to claim 6 is characterized in that the insertion hole is a blind hole, and the bottom of the hole of the insertion hole is relatively located in the conductor column. The microwave heating assembly according to claim 6 is characterized in that a feeding hole connecting the cavity with the outside is provided on the side wall of the outer conductor unit, and the outer conductor is embedded in the feeding hole; and the plug hole is opposite to the feeding hole. The microwave heating assembly according to claim 1, characterized in that the inner conductor is coaxially arranged in the outer conductor, and the microwave feeding unit further comprises a dielectric layer, and the dielectric layer is between the outer conductor and the inner conductor. The microwave heating assembly according to claim 1, characterized in that the conductor column includes a fixed end and a free end opposite to the fixed end, the fixed end is fixed to the end wall of the closed end, and the free end extends toward the open end. The microwave heating assembly according to claim 12, characterized in that the microwave matching structure further comprises a conductor disk axially coupled to the free end, and a diameter of the conductor disk is greater than a diameter of the conductor column. The microwave heating assembly according to claim 13, characterized in that the microwave matching structure further comprises a probe device in a longitudinal shape, one end of the probe device is inserted into the conductor disk and is in ohmic contact with the conductor disk. The microwave heating assembly according to claim 14, wherein the conductor disk, the conductor column, the probe device and the outer conductor unit are coaxial. The microwave heating assembly according to claim 1 is characterized in that the microwave heating assembly further comprises a receiving seat mounted on the outer conductor unit, the receiving seat comprising a receiving portion for receiving the aerosol generating product, and the receiving portion is disposed in the cavity. An aerosol generating device comprises a microwave generating device, characterized in that it also comprises the microwave heating assembly according to any one of claims 1 to 16, and the microwave feeding unit is connected to the microwave generating device.