Heating device and aerosol generating device

Abstract

The present application provides a heating device and an aerosol generating device, wherein the heating device comprises a cavity; a heater; and a first end cover including an inner cylinder connected to one end of the heater and extending into at least a portion of the cavity; the inner cylinder has a closed end and an open end on the opposite side; the open end of the inner cylinder contacts the aerosol generating product when the aerosol generating product is received in the cavity, thereby forming a basically closed space between the closed end and the open end. The present application may form a closed cavity on the end cover after inserting the aerosol generating product into the heating device; and when heating is performed on the inserted aerosol generating product, the closed cavity may store the heated aerosol, thereby improving the vapor concentration when inhaled by a user and further enhancing the user's inhalation experience; and in another aspect, the closed cavity may collect condensate and residue, which is advantageous for the cleanliness of the aerosol generating device.

Description

Technology Field

[0001] This application relates to the field of smoking set technology, and in particular to heating mechanisms and aerosol generating devices.

[0002] This application claims priority to a Chinese patent application filed with the Chinese Intellectual Property Office on March 19, 2021, with application number 202120583958.3 and titled “Heating device and aerosol generating device”, all of which are incorporated herein by reference. Background Technology

[0003] For example, smoking products such as cigarettes and cigars generate smoke by burning tobacco during use. Attempts have already been made to provide substitutes for these tobacco-burning products through products that release compounds in a non-combustion state. An example of such a product is the so-called heated non-combustion product, which releases compounds by heating the tobacco rather than burning it.

[0004] Conventional smoking sets all use a bottom-inhalation method, which results in low negative pressure inside the cigarette during inhalation, making it disadvantageous for aerosol discharge, thus producing a small amount of vapor and providing a poor inhalation experience for the user; on the other hand, if the component is placed under the heater, condensation or residue easily accumulates on the component, which is disadvantageous for the cleanliness of the smoking set and causes damage to the component. The problem to be solved

[0005] The present application aims to provide a heating mechanism and an aerosol generating device to solve the problem that conventional smoking sets have a small amount of vapor and are disadvantageous in terms of cleanliness when using a bottom-inhalation method. means of solving the problem

[0006] The present application provides a heating device,

[0007] Cavity;

[0008] A pipe-shaped structure extending along the axial direction of the cavity and surrounding the cavity; and a heater that heats an aerosol-generating product detachably accommodated in the cavity to generate an aerosol for inhalation;

[0009] It includes a first end cover connected to one end of the heater and comprising an inner cylinder that extends and is inserted into at least a portion of the cavity;

[0010] The inner cylinder has a closed end and an open end on the opposite side; the open end of the inner cylinder comes into contact with the aerosol-generating product when the aerosol-generating product is received within the cavity, thereby forming a basically closed space between the closed end and the open end.

[0011] An embodiment of the present application also provides an aerosol generating device, wherein the aerosol generating device comprises a housing, a cell, and the heating mechanism;

[0012] The cell and the heating mechanism are both provided within the housing. Effects of the invention

[0013] The heating device and aerosol generating device provided by the present application can form a closed cavity on a cover after inserting an aerosol generating product into the heating device; when heating is performed on the inserted aerosol generating product, the closed cavity can store the heated aerosol, thereby improving the vapor concentration when the user inhales and further enhancing the user's inhalation experience; on the other hand, the closed cavity can collect condensate and residue, which is advantageous for the cleanliness of the aerosol generating device. Brief explanation of the drawing

[0014] One or more embodiments are described illustratively through the drawings corresponding thereto, but such illustrative description is not limiting to the embodiments, components / modules and steps having the same reference numerals in the drawings represent similar components / modules and steps, and, except as specifically described, the drawings in the drawings are not limited in proportion. FIG. 1 is a drawing of an aerosol generating device provided by an embodiment of the present application. FIG. 2 is a cross-sectional view of an aerosol generating device provided by an embodiment of the present application. Figure 3 is a local enlarged view of Figure 2. FIG. 4 is an exploded view of an aerosol generating device provided by an embodiment of the present application. FIG. 5 is an exploded view of a heating mechanism among the aerosol generating devices provided by the embodiment of the present application. FIG. 6 is a drawing of a heater provided by an embodiment of the present application. FIG. 7 is a drawing of the top cover provided by the embodiment of the present application. FIG. 8 is a drawing of a bottom cover provided by an embodiment of the present application. FIG. 9 is a drawing of the bottom cover at another time provided by the embodiment of the present application. Specific details for implementing the invention

[0015] To facilitate understanding of the present application, the present application will be described in detail below with reference to the attached drawings and specific embodiments. It should be noted that when one element is said to be "fixed" to another element, it may be directly on the other element, or one or more intermediate elements may exist between them. When one element is said to be "connected" to another element, it may be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "up," "down," "left," "right," "inside," "outside," and similar terms used herein are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the meanings commonly understood by those skilled in the art of this application. Terms used in the description of this application within this specification are intended to describe specific embodiments and are not intended to limit this application. As used herein, “and / or” includes any and all combinations of one or more related listed items.

[0017] As illustrated in FIGS. 1 to 2 and FIGS. 4, an embodiment of the present application provides an aerosol generating device (100) comprising a housing, a holder (104) accommodated within the housing, a cell (105), a heat gasket (106), an insulating piece (107), a heating device (108), a fixing plate (109), and a circuit board (110).

[0018] The above housing includes a main body (101), an upper cover (102), and a lower cover (103). The main body (101) is generally in the shape of a pipe with both ends open, and the upper cover (102) is clipped to the top of the main body (101), and the lower cover (103) is clipped to the bottom of the main body (101) to form a receiving space to accommodate a holder (104), a cell (105), a heat gasket (106), an insulating piece (107), a heating device (108), a fixing plate (109), and a circuit board (110).

[0019] The upper cover (102) is provided with a through hole, and the aerosol generating product (200) is received within the cavity of the heating mechanism (108) in the housing so as to be detachably accessible through the through hole. The heating mechanism (108) can heat the aerosol generating product to generate an inhalable aerosol, and the user can inhale through a filter member exposed outside the through hole. The aerosol generating product (200) may be described by reference to the prior art, and a detailed description thereof is omitted here.

[0020] A fixed plate (109) is fixed on a holder (104), and the fixed plate (109) and the holder (104) together divide the receiving space within the housing into a first receiving space and a second receiving space that are mutually isolated along the longitudinal direction of the aerosol generating device; a heating device (108) is provided in the first receiving space, and a cell (105) is provided in the second receiving space. The holder (104) has a support portion (1042) extending along the longitudinal direction of the aerosol generating device and a receiving portion (1041) formed on the support portion (1042); after the fixed plate (109) is fixed to the holder (104), the fixed plate and the receiving portion (1041) form a first receiving space with one end open and the other end closed to accommodate the heating device (108); and the cell (105) is positioned on one side of the support portion (1042) and located below the receiving portion (1041). As to be explained, in other examples, it is possible for the fixing plate (109) and the holder (104) to be formed integrally, or similarly, it is possible to implement a first receiving space and a second receiving space that are mutually isolated along the longitudinal direction of the aerosol generating device through one or more isolation plates.

[0021] The cell (105) provides power for operating the aerosol generating device (100). For example, the cell (105) can provide power to heat the heater (1085). Also, the cell (105) can provide power necessary to operate other components provided by the aerosol generating device (100). The cell (105) may be a rechargeable battery or a disposable battery. The cell (105) may be a lithium iron phosphate (LiFePO4) battery. For example, the cell (105) may be a lithium cobaltate (LiCoO2) battery or a lithium titanate battery.

[0022] The circuit board (110) is fixed to the support member (1042). The circuit board (110) can control the overall operation of the aerosol generating device (100). The circuit board (110) controls the operation of the cell (105) and the heater (1085), as well as the operation of other components in the aerosol control device (100). For example, the circuit board (110) can acquire temperature information of the heater (1085) detected by a temperature sensor and control the power provided by the cell (105) to the heater (1085) based on the information.

[0023] As illustrated in FIGS. 3 and 5, the heating device (108) includes a clamp (1081), an upper cover (1082), a first sealing member (1083), a thermal insulation member (1084), a heater (1085), a first thermal insulation member (1086), an electrode connecting member (1087), a second sealing member (1088), a lower cover (1089), a thermal insulation pad (1090), a second thermal insulation member (1091), and a sleeve (1092).

[0024] The heater (1085) generates infrared rays to radiately heat the aerosol generating product (200) contained in the cavity. As shown in FIG. 6, the heater (1085) is,

[0025] It includes a base body (10851) configured in a pipe shape that extends along the axial direction of the cavity and surrounds the cavity.

[0026] Specifically, the base body (10851) comprises a first stage and a second stage and extends to the surface between the first stage and the second stage. The base body (10851) may be cylindrical, truncated pyramidal, or other columnar shapes. It is preferable that the base body (10851) be cylindrical, and a cylindrical hole penetrating the middle of the base body (10851) forms at least a partial cavity, and the inner diameter of the hole is slightly larger than the outer diameter of the aerosol generating product (200). The base body (10851) may be manufactured from a high-temperature resistant and transparent material such as quartz glass, ceramic, or mica, and may also be manufactured from other materials having a relatively high infrared transmittance.

[0027] An infrared heat-generating coating layer (10852) is formed on the surface of a base body (10851). The infrared heat-generating coating layer (10852) may be formed on the outer surface of the base body (10851) and may also be formed on the inner surface of the base body (10851). The infrared heat-generating coating layer (10852) receives heat generated by electric power and further generates infrared rays of a certain wavelength, for example, far-infrared rays of 8 μm to 15 μm. When the wavelength of the infrared rays matches the absorption wavelength of the aerosol-forming substrate, the energy of the infrared rays can be easily absorbed by the aerosol-forming substrate.

[0028] The conductive element includes a first electrode (10853) and a second electrode (10854) spaced apart on a base body (10851) to feed the electric power to an infrared heat coating layer (10852). In this example, both the first electrode (10853) and the second electrode (10854) are conductive coating layers, and the conductive coating layer may be a metal coating layer or an electrically conductive tape, and the metal coating layer may include silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium, or the metal alloy material. In this example, the first electrode (10853) and the second electrode (10854) are symmetrically provided along the central axis of the base body (10851). The first electrode (10853) includes a coupling electrode (10853b) and a bar-shaped electrode (10853a), and the second electrode (10854) includes a coupling electrode (10854b) and a bar-shaped electrode (10854a). The coupling electrode (10853b) and the coupling electrode (10854b) do not come into contact with the infrared thermal coating layer (10852), and at least a portion of the bar-shaped electrode (10853a) and the bar-shaped electrode (10854a) come into contact with the infrared thermal coating layer (10852) to form an electrical connection. The coupling electrode (10853b) and the coupling electrode (10854b) are coupled to the cell (105) through an electrode connecting member (1087).

[0029] As to be explained, the infrared emitter comprising the infrared thermal coating layer (10852), the first electrode (10853), and the second electrode (10854) is not limited to the example shown in FIG. 6. In other examples, the infrared emitter may be formed as an infrared radiation layer for thermal activation, or as a thin film structure wound on a base body (10851), etc. As to be explained further, in other examples, the heater (1085) is not limited to an infrared heating method and may also be resistance heating, electromagnetic heating, etc.

[0030] The upper end cover (1082) may be provided with a sleeve at the first end of the base body (10851), the lower end cover (1089) may be provided with a sleeve at the second end of the base body (10851), and the thermal insulation member (1084) may be provided with a sleeve on the base body (10851) along the cavity diameter direction. The upper end cover (1082) and the lower end cover (1089) are insulated and selected from materials that are resistant to high temperatures and provide thermal insulation. The thermal insulation member (1084) is provided with a double-layer pipe along the cavity diameter direction, and gas or vacuum is filled between the double-layer pipes to allow for sealing.

[0031] As illustrated in FIG. 7, the upper end cover (1082) includes a hollow tube (10821), a protrusion (10822) extending along the cavity diameter direction from one end of the hollow tube (10821), and a retaining portion (10823) extending from the axial direction of the protrusion (10822). When the upper end cover (1082) is sleeved to the first end of the base body (10851), the retaining portion (10823) contacts the outer surface of the base body (10851) to retain the first end of the base body (10851). The end of the thermal insulation member (1084) may contact the protrusion (10822). As can be seen from the drawing, both facing surfaces along the diameter direction of the retaining part (10823) are provided with protruding blocks extending in the diameter direction, thereby so that when the upper end cover (1082) is sleeved on the first end of the base body (10851), the protruding block of one surface contacts the outer surface of the base body (10851); and when the end of the thermal insulation member (1084) contacts the protrusion (10822), the protruding block of the other surface contacts the inner surface of the thermal insulation member (1084).

[0032] As shown in FIG. 8, the lower cover (1089) includes an inner cylinder (10891) and an outer cylinder (10892), and the base body (10851) is provided with a sleeve between the outer wall of the inner cylinder (10891) and the inner wall of the outer cylinder (10892).

[0033] The inner cylinder (10891) has a closed end and an open end on the opposite side; when an aerosol generating product (200) is received in the cavity, the aerosol generating product (200) comes into contact with the open end of the inner cylinder (10891), forming a closed cavity (A) between the closed end and the open end. The closed cavity (A) can store the heated aerosol, thereby improving the vapor concentration when the user inhales and further enhancing the user's inhalation experience; on the other hand, the closed cavity (A) can collect condensate and residue, which is advantageous for the cleanliness of the aerosol generating device. When the user inhales, the airflow enters through the opening of the upper cover (102) and flows to the bottom of the aerosol generating product (200) along the gap between the aerosol generating product (200) and the inner surface of the base body (10851), forming an airflow path. Due to the presence of the closed end of the inner cylinder (10891), when the lower cover (1089) is sleeved to the second end of the base body (10851), the second end of the base body (10851) is closed and the heating device (108) is accommodated in the first receiving space, thereby increasing the heat conduction distance between the hot air in the cavity and the cell (105) through the closed end of the inner cylinder (10891) and the receiving portion (1041) of the holder (104), thereby preventing the risk of the temperature of the cell (105) becoming excessively high and causing ignition, explosion, etc.

[0034] In conjunction with Fig. 3, depending on the axial direction of the cavity, the position of the second stage of the base body (10851) is located between the closed stage and the open stage, that is, some closed cavities (A) may be located outside the heating area.

[0035] Combining FIGS. 3 and 9, the outer cylinder (10892) is provided with a proximal end (at the time of FIG. 8) and a periphery; along the axial direction of the cavity, a concave cavity (B) is formed between the proximal end of the outer cylinder (10892) and the closed end of the inner cylinder (10891); and a portion of an insulating pad (1090) is received in the concave cavity (B). The insulating pad (1090) may use a general insulating material, for example, aerogel, and the insulating pad (1090) matches the shape of the concave cavity (B). Through the insulating pad (1090), the temperature of the cell (105) can be prevented from becoming excessively high. Furthermore, within the concave cavity (B), a plurality of spaced protruding blocks (10897) are provided extending toward the insulating pad (1090); The insulation pad (1090) is in contact with the protruding block (10897). Through the plurality of protruding blocks (10897), a cavity is formed between the insulation pad (1090) and the closed end, and furthermore, thermal insulation can be promoted through the low thermal conductivity coefficient of air in the cavity. Referring again to FIG. 2, an insulation piece (107) may be further provided between the cell (105) and the receiving portion (1041), and further, the temperature of the cell (105) may be prevented from becoming excessively high. The material of the insulation piece (107) may be the same as that of the insulation pad (1090). A thermal gasket (106) may be provided between the cell (105) and the lower cover (103), so that the cell (105) can be held in the thermal gasket (106).

[0036] Furthermore, the outer wall of the outer cylinder (10892) may be provided with a plurality of contact portions (10894) extending toward a thermal insulation member (1084) distributed in a circumferential direction, and the end of the outer cylinder (10892) may be provided with a protrusion (10896) extending along the cavity diameter direction, and by providing the contact portions (10894) and the protrusion (10896), the assembly of the thermal insulation member (1084) may be facilitated so that the end of the thermal insulation member (1084) may come into contact with the protrusion (10896). The inner wall of the outer cylinder (10892) further comprises a plurality of spaced-apart retaining portions (10893), and the retaining portions (10893) extend from the inner wall of the outer cylinder (10892) toward the inner cylinder (10891), and when the base body (10851) is provided with a sleeve on the lower end cover (1089), the retaining portions (10893) are pushed into contact with the outer surface of the base body (10851) to retain the second end of the base body (10851). The lower end cover (1089) further includes a circumferential limit portion that prevents rotation of the base body (10851), and the circumferential limit portion includes a positioning projection (10895) that protrudes from the lower end cover (1089) toward one side of the base body (10851), and a positioning notch is formed in the tube wall of the base body (10851) to correspond to the positioning projection (10895). When the base body (10851) is sleeved on the lower end cover (1089), the positioning projection (10895) and the positioning notch are formed to correspond to each other, thereby preventing the base body (10851) from rotating circumferentially relative to the lower end cover (1089). The lower end cover (1089) further includes a through hole for drawing out an electrode connection component (1087).

[0037] Furthermore, a first sealing member (1083) is provided between the upper end cover (1082) and the first end of the base body (10851), and a second sealing member (1088) is provided between the lower end cover (1089) and the second end of the base body (10851), thereby preventing aerosols generated inside the base body (10851) from entering the space between the outer surface of the base body (10851) and the thermal insulation member (1084), thereby preventing corrosion of the infrared heat transfer coating layer (10852) and the conductive coating layer on the outer surface of the base body (10851) and improving the operational stability of the heater (1085). The clamp (1081) is provided on the upper end cover (1082) to facilitate clamping or positioning the aerosol generating product (200).

[0038] After assembling the base body (10851), upper cover (1082), lower cover (1089), and thermal insulation member (1084) together, since both ends of the thermal insulation member (1084) are in contact with the protrusion (10822) and protrusion (10896), respectively, a generally sealed chamber can be formed between the outer surface of the base body (10851), the upper cover (1082), the lower cover (1089), and the thermal insulation member (1084), and a first insulating member (1086) can be provided within the sealed chamber to prevent the heat from the heater (1085) from being transferred to the outside of the aerosol generating product (100).

[0039] In this example, the first insulating member (1086) includes an aerogel layer coated on the outer surface of the base body (10851), and the aerogel layer reduces the radiant heat conduction of the heater, and additionally, the closed chamber reduces air flow inside and outside the closed chamber, thereby preventing the aerosol powder from falling off. The length of the closed space along the cavity axis is greater than the length of the aerogel layer along the cavity axis, so that the closed space covers the aerogel layer, which is advantageous for insulation. Furthermore, the gap extending along the cavity axis between the aerogel layer and the insulating pipe is loosened by the aerogel, resulting in good insulation, and additionally, the air within the gap blocks heat from being transferred outside the aerosol generating device (100).

[0040] A second insulating member (1091) and a sleeve (1092) are further provided along the cavity diameter direction, and the second insulating member (1091) can be described by referring to the description of the first insulating member (1086), and after sleeving the sleeve (1092), a heating device (108) is accommodated in the first receiving space.

[0041] As should be explained, while the specification and drawings of this application present preferred embodiments of this application, this application may be implemented in many different forms and is not limited to the embodiments described in this specification. Such embodiments are not an additional limitation to the content of this application, and the purpose of providing such embodiments is to make the content disclosed in this application more thorough and comprehensive. Furthermore, various embodiments not exemplified above, formed by continuously combining each of the above technical features, are all within the scope of the description in this application. Moreover, a person skilled in the art may make improvements or modifications based on the above description, and all such improvements and modifications shall be within the scope of protection of the appended claims of this application.

Claims

Claim 1 A heating device comprising: a cavity; a pipe-shaped structure extending along the axial direction of the cavity and surrounding the cavity; a heater for heating an aerosol-generating product detachably received in the cavity to generate an aerosol for inhalation; a first end cover connected to one end of the heater and including an inner cylinder that extends and is inserted into at least a portion of the cavity; wherein the inner cylinder has a closed end and an open end on the opposite side; and the open end of the inner cylinder contacts the aerosol-generating product when the aerosol-generating product is received in the cavity, thereby forming a basically closed space between the closed end and the open end. Claim 2 A heating mechanism according to claim 1, wherein the first end cover further comprises an outer cylinder and a connecting portion extending from the inner wall of the outer cylinder to the inner wall of the inner cylinder, and one end of the heater is positioned between the inner wall of the outer cylinder and the outer wall of the inner cylinder and contacts the connecting portion. Claim 3 A heating mechanism according to claim 1, wherein, according to the axial direction of the cavity, the position of the heater end is located between the closed end and the open end. Claim 4 In paragraph 2, the outer cylinder comprises a proximal end and a distal end; and along the axial direction of the cavity, a concave cavity is formed between the proximal end of the outer cylinder and the distal end of the inner cylinder; the heating mechanism further comprises an insulating pad, wherein at least a portion of the insulating pad is received in the concave cavity. Claim 5 In paragraph 4, the heating mechanism comprises a plurality of spaced-apart protruding blocks extending toward the insulating pad within the concave cavity; and the insulating pad contacts the protruding blocks. Claim 6 A heating device according to claim 1, wherein the heating device further comprises a second end cover maintained at the other end of the heater. Claim 7 In claim 6, the heating mechanism further comprises a thermal insulating member located outside the heater along the diameter direction; one end of the thermal insulating member is in contact with the first end cover, and the other end of the thermal insulating member is in contact with the second end cover. Claim 8 A heating apparatus according to claim 1, wherein the heater comprises: a base body having a surface; and an infrared emitter provided on the surface; which generates infrared rays to radiately heat an aerosol-generating product contained in the cavity. Claim 9 An aerosol generating device, wherein the aerosol generating device comprises a housing, a cell, and a heating mechanism according to any one of claims 1 to 8; and wherein both the cell and the heating mechanism are provided within the housing. Claim 10 In claim 9, the aerosol generating device further comprises a separator plate provided within the housing; the separator plate divides the space within the housing into a first receiving space and a second receiving space that are mutually isolated along the longitudinal direction of the aerosol generating device; the heating device is provided within the first receiving space and the cell is provided within the second receiving space, the aerosol generating device. Claim 11 In claim 10, the aerosol generating device further comprises an insulating plate provided between the separator and the cell.

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