RU2824062C1 - Spraying heating unit and spraying heating device using it - Google Patents

Abstract

FIELD: spraying technique.

SUBSTANCE: group of inventions relates to a spraying heating unit and a spraying heating device of an electronic cigarette. Spraying heating unit comprises a liquid transfer unit and a heating unit. Liquid transfer unit is a porous liquid transfer unit, and the heating unit is a magnetically conductive porous heating unit. Porous unit for transfer of liquid is made in the form of porous structure with pores of micron size, formed by high-temperature sintering of inorganic non-metallic aggregate and binder. Magnetically conductive porous heating unit is made in form of magnetically conductive porous structure, formed by direct high-temperature sintering of particles of magnetically conductive material or high-temperature sintering of particles of magnetically conductive material and binder. Magnetically conductive porous heating unit is at least inserted into the surface of the porous liquid transfer unit or attached to it, and the open surface of the magnetically conductive porous heating unit located in the spraying channel forms a spraying surface. Spraying heating device comprises a housing, a mouthpiece, a liquid reservoir and the disclosed spraying heating unit located under the liquid reservoir, and a sealing element is located between the spraying heating unit and the liquid reservoir.

EFFECT: simplification of design and prevention of dry burning of liquid forming aerosol.

17 cl, 9 dwg, 1 tbl

Description

REGION TECHNIQUES

[0001] The present invention relates to the technical field of spraying technology, in particular to a spray heating unit and a spray heating device using the same.

LEVEL TECHNIQUES

[0002] Since a new atomization technology has emerged in recent years, according to the electric heating atomization technology, a liquid is heated and atomized into an atomized vapor by means of thermal energy generated by means of the thermal effect of resistance, and this technology is widely applied to medical products, intelligent home appliances and home electronic appliances. Electric heating modes include a resistance heating mode and an electromagnetic heating mode. In the case of electromagnetic induction heating, an alternating magnetic field is generated by means of components of an electronic printed circuit board, and when a magnetically conductive metal material is placed in the alternating magnetic field, an alternating current and an eddy current are generated on the surface of the magnetically conductive metal material, and the carriers in the magnetic conductor move unevenly under the action of the eddy current to collide with atoms, and thermal energy is generated due to the friction between the carriers and the atoms. Since the resistance heating is limited by the resistance of the heating block, the material of the heating block is limited, and the heat generated by the heating block has a large relationship with the cross-sectional area of the conductor and other factors. The heating block often needs to be connected to an external power source, so the heat generated by the heating block is limited by the resistance of the product. In addition, to ensure normal use, it is generally necessary to attach the liquid transfer material to or insert it into the porous material, and after the liquid transfer material is separated from the porous material by heating, the heating block will cause dry burning of the atomizing core.

Spray heating units and spray heating elements are known, for example, from patents: CN 109288136 A (01.02.2019, SHENZHEN SMOORE TECHNOLOGY LTD), CN 110282979 A (27.09.2019, HUNAN JIASHENG DIANTAO NEW MAT CO LTD), RU 2741896 C2 (29.01.2021, RAI STRATEGIC HOLDINGS, INC.), RU 2759876 C2 (18.11.2021, PHILIP MORRIS PRODUCTS S.A.), RU 2670534 C1 (23.10.2018, NICOVENCHERS HOLDINGS LIMITED), RU 2678892 C2 (04.02.2019, RAI STRATEGIC HOLDINGS, INC.) and EA 37429 B1 (26.03.2021, JT INTERNATIONAL S.A.)”.

DISCLOSURE ENTITIES INVENTIONS

[0003] In view of the disadvantages of the prior art, the technical problem to be solved by the present invention is to propose a spray heating unit and a spray heating device using it. An easy-to-use liquid transfer unit and a heating unit using an electromagnetic heating mode are proposed, wherein the function of the liquid transfer unit and the function of the heating unit are combined, which simplifies the design of the sprayers and reduces their cost.

[0004] The technical solution proposed in the present invention for solving the said technical problem consists in proposing a spray heating unit comprising a porous block for transferring liquid and a magnetically conductive porous heating block. The porous block for transferring liquid is made in the form of a porous structure with micron-sized pores formed by high-temperature sintering of an inorganic non-metallic filler and a binder. The magnetically conductive porous heating block is made in the form of a magnetically conductive porous structure formed by direct high-temperature sintering of particles of a magnetically conductive material or high-temperature sintering of particles of a magnetically conductive material and a binder. The magnetically conductive porous heating block is at least inserted into the surface of the porous block for transferring liquid or attached to it, and the open surface of the magnetically conductive porous heating block located in the spray channel forms a spray surface.

[0005] In addition, preferably, in the spray heating unit, the magnetically conductive porous heating block is made of the following raw materials: 50-100 parts of magnetically conductive metal powder, 0-30 parts of ceramic powder, 0-40 parts of sintering additive, and 0-30 parts of paraffin.

[0006] In addition, the magnetically conductive metal powder is at least one of pure iron, low-carbon steel, iron-aluminum alloy, iron-silicon alloy, iron-nickel alloy, iron-cobalt alloy, ferrite, metallic nickel and metallic cobalt.

[0007] In addition, it is preferable that in the spray heating unit, the binder is glass powder or glaze and has a melting point of 600-1300°C.

[0008] In addition, it is preferable that in the spray heating unit, a portion of the surface of the porous liquid transfer block that is in contact with the sealing element is not provided with a magnetically conductive porous heating block.

[0009] In addition, it is preferable that in the spray heating unit, the thickness of the liquid transfer porous block is greater than the thickness of the magnetically conductive porous heating block.

[0010] In addition, it is preferable that in the spray heating unit, the thickness of the portion of the magnetically conductive porous heating block provided with the spray surface is greater than the thickness of other portions of the magnetically conductive porous heating block.

[0011] In addition, preferably, in the spray heating unit, an air guiding element configured to guide air and increase the spray area is disposed on the spray surface of the magnetically conductive porous heating unit in the air flow direction.

[0012] In addition, it is preferable that in the spray heating unit, a plurality of columns of said air guiding elements are arranged in the air flow direction, and gaps are provided between said plurality of columns of said air guiding elements.

[0013] In addition, preferably, in the spray heating unit, in the air flow direction, the air guiding elements located in the same column are arranged intermittently or continuously.

[0014] In addition, it is preferable that in the spray heating unit the air guiding element is arranged parallel, radially or staggered.

[0015] Furthermore, preferably, in the spray heating unit, the cross-section of the air guiding element has a polygonal shape, a curved shape, or a combination thereof.

[0016] Furthermore, preferably, in the spray heating unit, the air guiding member is at least one of an air guiding groove, an air guiding rib, and an air guiding protrusion.

[0017] In addition, it is preferable that in the spray heating unit, the porous liquid transfer unit is formed into a plate structure, a cup-shaped structure, a groove structure, or a cylindrical structure.

[0018] In addition, it is preferable that in the spray heating unit, the magnetically conductive porous heating block is formed as a plate structure inserted into the middle of the side wall of the porous block for transferring liquid, or the magnetically conductive porous heating block is formed as a cylindrical structure inserted into the middle of the inner wall or the outer wall of the porous block for transferring liquid.

[0019] In addition, it is preferable that in the spray heating unit, the spray surface of the magnetically conductive porous heating block extends beyond the side surface of the porous liquid transfer block or is formed flush with the side surface of the porous liquid transfer block.

[0020] Furthermore, preferably, in the spray heating unit, the liquid inflow surface located on the porous liquid transfer block is at least one of a flat surface, a curved surface and a grooved surface, wherein the spray surface is at least one of a flat surface and a curved surface.

[0021] In addition, it is preferable that in the spray heating unit, a liquid transfer hole or a liquid transfer groove is preferably formed in the liquid inflow surface of the porous liquid transfer block.

[0022] The atomizing heating device comprises a body, a mouthpiece and a liquid reservoir. The above-described atomizing heating unit is located under the liquid reservoir, and a sealing element is located between the atomizing heating unit and the liquid reservoir.

[0023] The present invention has the following advantageous effects: the invention provides a spray heating unit comprising a porous block for transferring liquid and a magnetically conductive porous heating block; the porous block for transferring liquid is formed in the form of a porous structure formed by high-temperature sintering of an inorganic non-metallic filler and a binder, the magnetically conductive porous heating block is formed in the form of a magnetically conductive porous structure formed by direct high-temperature sintering of particles of a magnetically conductive material or high-temperature sintering of particles of a magnetically conductive material and a binder, wherein the magnetically conductive porous heating block is at least inserted into the surface of the porous block for transferring liquid or attached thereto, and the open surface of the magnetically conductive porous heating block located in the spray channel forms a spray surface. An easy-to-use liquid transfer unit and a heating unit using an electromagnetic heating mode are proposed, and the operation of the liquid transfer unit and the operation of the heating unit are combined, which simplifies the design of the sprayers and reduces their cost.

BRIEF DESCRIPTION DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the drawings:

[0025] Fig. 1 is a sectional view according to a first embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0026] Fig. 2 is a sectional view according to a second embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0027] Fig. 3 is a three-dimensional structural view according to a third embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0028] Fig. 4 is a top view according to a third embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0029] Fig. 5 is a three-dimensional structural view according to a fourth embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0030] Fig. 6 is a top view according to a fourth embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0031] Fig. 7 is a three-dimensional structural view of a fifth embodiment of the spray heating unit in Embodiment 1 of the present invention;

[0032] Fig. 8 is an exploded view of the spray heating device in Embodiment 2 of the present invention; and

[0033] Fig. 9 is a sectional view of the spray heating device in Embodiment 2 of the present invention.

IMPLEMENTATION INVENTIONS

[0034] For a better understanding of the technical features, objectives and effects of the present invention, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0035] When one element is referred to as being "attached" to or "located on" another element, it may be located directly or indirectly on said other element. When one element is referred to as being "connected" to another element, it may be directly or indirectly connected to said other element.

[0036] Terms such as "upper,""lower,""left,""right,""front,""rear,""vertical,""horizontal,""top,""bottom,""inner," and "outer" are used to indicate directions or positions based on accompanying drawings.

[0037] The term "axial" refers to a direction along the length of the entire device or component, and the term "radial" refers to a direction perpendicular to the axial direction.

[0038] Terms such as "first" and "second" are used only for the purpose of facilitating the description and are not to be construed as indicating or implying relative importance or as implicitly indicating the number of technical features mentioned. Unless otherwise expressly stated, the term "plurality" means two or more.

[0039] The above terms are intended only to facilitate the description and should not be construed as limitations of the technical solutions of the invention.

[0040] Embodiment 1: As shown in Fig. 1-7, the spray heating unit includes a porous liquid transfer block 100 and a magnetically conductive porous heating block 200. Here, the porous liquid transfer block 100 is formed as a porous structure with micron-sized pores formed by high-temperature sintering of an inorganic non-metallic filler and a binder. The micron-sized pores formed after high-temperature sintering of the inorganic non-metallic filler and the binder can provide channels allowing the liquid to be sprayed to flow, and the porous liquid transfer block 100 with high strength can provide structural support and has heat-insulating effects. The magnetically conductive porous heating block 200 is designed as a magnetically conductive porous structure formed by direct high-temperature sintering of magnetically conductive material particles or high-temperature sintering of magnetically conductive material particles and a binder. That is, the magnetically conductive porous structure can be obtained by direct high-temperature sintering of magnetically conductive material particles or high-temperature sintering of magnetically conductive material particles and a binder, and in both cases, micron-sized micropores are formed. The magnetically conductive structure formed in this way can not only generate heat by electromagnetic induction, but can also perform a liquid transfer function using micron-sized micropores. The magnetically conductive porous heating block 200 is at least inserted into the surface of the porous block 100 for liquid transfer or attached to it. It should be understood that the magnetically conductive porous heating block 200 can be inserted into any surface of the porous block 100 for liquid transfer or attached to it. A plurality of magnetically conductive porous heating blocks 200 may be arranged at intervals, or one magnetically conductive porous heating block 200 may be arranged continuously. A plurality of magnetically conductive porous heating blocks 200 may be inserted into one surface of the porous block 100 for transferring liquid or attached to it, or a plurality of magnetically conductive porous heating blocks 200 may be inserted into different surfaces of the porous block 100 for transferring liquid or attached to them. As shown in Fig. 2, in the present invention, the term "inserted" may refer to the term "partially inserted", that is, one part of the magnetically conductive porous heating block 200 is recessed into the porous block 100 for transferring liquid, and the other part of the magnetically conductive porous heating block 200 extends beyond the surface of the porous block 100 for transferring liquid. As shown in Fig. 1, the term "inserted" may also refer to the term "completely inserted", that is, the magnetically conductive porous heating block 200 is completely located in the porous block 100 for transferring liquid, which means that the surface of the magnetically conductive porous heating block 200 is formed flush with the porous block 100 for transferring liquid. The magnetically conductive porous heating block 200 may be located on the surface of the porous block 100 for transferring liquid continuously or intermittently. The magnetically conductive porous heating block 200 may be located on all surfaces of the porous block 100 for transferring liquid, that is, the magnetically conductive porous heating block 200 may be located on each surface of the porous block 100 for transferring liquid, or located on a part of the surfaces of the porous block 100 for transferring liquid, or located on a part of any one surface of the porous block 100 for transferring liquid. The open surface of the magnetically conductive porous heating block 200 located in the spray channel forms the spray surface 21. It should be understood that the magnetically conductive porous heating block 200 is located in the spray channel, and the open surface of the magnetically conductive porous heating block 200 is the spray surface 21. The magnetically conductive porous heating block 200 as a heating layer has a characteristic feature in the form of a plurality of micropores, the magnetically conductive metal particles in the magnetically conductive porous heating block 200 can generate heat due to the electromagnetic effect, and said plurality of micropores provide the ability to sufficiently supply liquid, and the sprayed steam can smoothly flow out of the micropores, therefore, the heating layer can be formed over the entire surface capable of generating heat to provide higher thermal efficiency in a similar area, and the magnetically conductive porous heating block 200 in other positions has both a liquid transfer function and a heating function and can be used as a preheating element for preheating heating and atomizing the liquid in the porous liquid transfer unit 100, where the magnetically conductive porous heating unit 200 is inserted or attached, which improves the atomization effect and the taste of the atomized vapor. When the atomization heating unit operates, the porous liquid transfer unit 100 transfers the electronic cigarette liquid to be atomized to the atomization surface 21 of the magnetically conductive porous heating unit 200, the magnetically conductive porous heating unit 200 generates heat by electromagnetic effect to atomize the electronic cigarette liquid into the atomized vapor, and the atomized vapor is mixed with air to form an aerosol, which is eventually inhaled by users.

[0041] The magnetically conductive porous heating block 200 may not only be inserted into or attached to the surface of the porous block 100 for transferring liquid, but may also be embedded in the porous block 100 for transferring liquid to preheat the liquid to increase the flow rate of the liquid so that the liquid can be transferred to the spray surface 21 more quickly.

[0042] Preferably, a portion of the surface of the porous liquid transfer block 100 in contact with the sealing member 50 is not provided with the magnetically conductive porous heating block 200. Since the sealing member 50 is mainly made of rubber or plastic, the magnetically conductive porous heating block 200 is not arranged on a portion of the surface of the porous liquid transfer block 100 in contact with the sealing member 50, in order to prevent deformation or damage of the sealing member 50 caused by continuous heating of the magnetically conductive porous heating block 200, which may otherwise compromise the sealing effect of the sealing member 50.

[0043] The thickness of the porous liquid transfer block 100 is greater than the thickness of the magnetically conductive porous heating block 200. The porosity of the porous liquid transfer block 100 is 30%-70%, and the diameter of the micropores is 5-100 μm. It will be better that the thickness of the porous liquid transfer block 100 is larger than the thickness of the magnetically conductive porous heating block 200, since the spray temperature of the electronic cigarette liquid is usually 180-260°C, when the spray temperature is reached, the temperature of the magnetically conductive porous heating block 200 will be high, and the porous liquid transfer block 100 with a large size or thickness will be heated slowly, and the porous liquid transfer block 100 is connected to the liquid chamber of the atomization device, and the liquid chamber is generally made of a material that can withstand a temperature of about 120°C, and the porous liquid transfer block 100 needs to be thick enough to serve as a heat insulating material.

[0044] In addition, the thickness of the part of the magnetically conductive porous heating block 200 provided with the spray surface 21 is larger than the thickness of other parts of the magnetically conductive porous heating block 200 in such a way that the heating temperature per unit area of the part of the magnetically conductive porous heating block 200 provided with the spray surface 21 will be higher than the temperature of other parts of the magnetically conductive porous heating block 200. The part of the magnetically conductive porous heating block 200 provided with the spray surface 21 is mainly used for heating and spraying and requires a high heating temperature per unit area, therefore, this part is required to be set to have a large thickness. Other parts of the magnetically conductive porous heating element 200 can be used for preheating the liquid to be sprayed and require a low heating temperature per unit area, therefore, the thickness of these parts can be smaller than the thickness of the part of the magnetically conductive porous heating element 200 provided with the spray surface 21.

[0045] An air guiding member 300 configured to guide the air and increase the atomization area is disposed on the atomization surface 21 of the magnetically conductive porous heating block 200 in the air flow direction. Unlike conventional heating blocks, the magnetically conductive porous heating block 200 uses electromagnetic heating, which does not depend on the resistance and is related only to the magnetic permeability and the electromagnetic switching frequency, and in the atomization heating process, the temperature of the magnetically conductive porous heating block 200 will continuously increase during the heating time, while for atomization, the temperature must be maintained relatively constant, which requires rapid heat dissipation of the magnetically conductive porous heating block 200, therefore, the air guiding member 300 is preferably disposed on the atomization surface 21 of the magnetically conductive porous heating block 200. The air guiding member 300 can contribute to the air guiding and the increase of the atomization area, thereby improving the atomization ability. The air guiding member 300 can also increase the contact area between the heating surface and the air to promote heat dissipation of the magnetically conductive porous heating block 200, the atomized steam can be quickly discharged by air to prevent it from accumulating in the atomizing chamber, and dry combustion caused by high temperature is prevented.

[0046] The air guiding member 300 is at least one of an air guiding groove, an air guiding rib, and an air guiding projection. As shown in Fig. 2, the air guiding member 300 may be an air guiding groove, wherein the extension direction of the air guiding groove corresponds to the air flow direction, and the air guiding groove forms an air guiding channel. A plurality of air guiding grooves may be formed, wherein gaps are provided between the air guiding grooves, and the air flows along the air guiding grooves, thereby increasing the air flow speed. As shown in Fig. 3, the air guiding member 300 may be an air guiding rib, wherein a plurality of air guiding ribs are arranged, gaps are provided between the air guiding ribs to form air guiding channels, and the air flows along the air guiding channels, thereby increasing the air flow speed. The air guiding element 300 may be an air guiding protrusion, wherein a plurality of air guiding protrusions are arranged, gaps are provided between the air guiding protrusions to form air guiding channels, and the air flows through the air guiding channels, thereby increasing the air flow speed. A plurality of columns of the air guiding elements 300 may be arranged in the air flow direction, wherein gaps are provided between said plurality of columns of the air guiding elements 300 to form air guiding channels, and in the air flow direction, the air guiding elements 300 in the same column may be arranged intermittently or continuously, preferably continuously to implement a better air guiding effect. There are a plurality of embodiments of the arrangement of the air guiding elements 300. The air guiding elements 300 may be arranged in parallel, that is, the air guiding elements 300 are arranged parallel to each other. The air guiding elements 300 can be arranged radially, which means that a plurality of air guiding elements 300 diverge radially from one side to the other side of the magnetically conductive porous heating block in the air flow direction; or the air guiding elements 300 are arranged staggered, that is, the air guiding elements 300 are arranged staggered relative to each other until the direction of the air guiding channels formed by the air guiding elements 300 is identical to the air flow direction. The cross-section of the air guiding element 300 has a polygonal shape, a curvilinear shape, or a combination thereof.

[0047] There are many embodiments of the porous liquid transfer block 100. As shown in Fig. 1, the porous liquid transfer block 100 is formed as a plate structure, in which case the liquid inflow surface 11 located on the porous liquid transfer block 100 is formed as a flat structure, and accordingly, the magnetically conductive porous heating block 200 is formed as a plate structure inserted into the middle of the side wall of the porous liquid transfer block 100 or attached to it, and the spray surface 21 is formed as a flat structure. Or, as shown in Fig. 3-6, the porous liquid transfer block 100 is formed as a cylindrical structure, in which case the liquid inflow surface 11 located on the porous liquid transfer block 100 is formed as a curved structure, and, accordingly, the magnetically conductive porous heating block 200 is formed as a cylindrical structure inserted into the middle of the inner wall of the porous liquid transfer block 100 or attached to it, or is formed as a cylindrical structure attached to the middle of the outer wall of the porous liquid transfer block 100 or inserted into it, and the spray surface 21 is formed as a curved structure. Or, as shown in Fig. 2, the porous liquid transfer block 100 can be formed as a groove structure. It should be understood that the porous liquid transfer block 100 is provided with a groove 13 for transferring liquid. In this case, the liquid inflow surface 11 located on the porous liquid transfer block 100 is formed as a grooved surface structure, and accordingly, the magnetically conductive porous heating block 200 is inserted into the porous liquid transfer block 100 or attached to it, which corresponds to the liquid transfer groove. Or, as shown in Fig. 7, the porous liquid transfer block 100 can be formed as a cup-shaped structure, and accordingly, the magnetically conductive porous heating block 200 is inserted into the lower or outer wall of the cup-shaped porous liquid transfer block 100 or attached to it. The liquid inflow surface 11 located on the porous liquid transfer block 100 can be a flat surface, a curved surface, even a grooved surface or other structures that are not particularly limited herein. The spray surface 21 may be a flat surface, a curved surface, an inclined surface, or a combination thereof, which is not particularly limited herein and can be configured according to actual needs.

[0048] As shown in Fig. 1 - Fig. 2, a liquid transfer hole 12 or a liquid transfer groove 13 may be formed on the liquid inflow surface 11 of the porous liquid transfer block 100 to realize a better liquid inflow effect. The design of the liquid transfer groove 13 and/or the liquid transfer hole 12 is particularly important for the porous liquid transfer block and can increase the area of the liquid inflow surface 11 of the porous liquid transfer block 100, thereby facilitating the control of the liquid inflow rate and improving the stability of the liquid inflow. In particular, in some cases where the liquid inflow surface 11 of the porous liquid transfer block 100 is inclined and has a shorter liquid retention time than a flat or cup-shaped liquid inflow surface, adding a liquid transfer groove 13 and/or a liquid transfer hole 12 can improve the efficiency and stability of the liquid inflow.

[0049] A method for producing a spray heating unit includes: preparing a slurry for a porous block for transferring liquid from an inorganic non-metallic filler and a binder, preparing a slurry for a magnetically conductive porous heating block from particles of a magnetically conductive material or particles of a magnetically conductive material and a binder, performing hot-pressing injection molding of the slurry for the magnetically conductive porous heating block using a mold to obtain a magnetically conductive porous heating block 200 after cooling and fixing the magnetically conductive porous heating block 200, injecting the slurry for the porous block 200 for transferring liquid to obtain a blank material of the spray heating block by molding, and sintering the blank material of the spray heating block at a high temperature in a high-temperature sintering furnace to obtain the spray heating unit.

[0050] Common inorganic non-metallic filler materials contain molten quartz sand, diatomite, talc, zeolite, sepiolite, maifanite, cordierite, silicon oxide, zirconium and other high-temperature refractory ceramic powders, and the binder is glass powder or glaze and has a melting point of 600-1300°C.

[0051] The magnetically conductive porous heating block 200 is made from the following raw materials: 50-100 parts of magnetically conductive metal powder, 0-30 parts of ceramic powder, 0-40 parts of sintering additive and 0-30 parts of paraffin. The magnetically conductive metal powder is at least one of pure iron, low-carbon steel, iron-aluminum alloy, iron-silicon alloy, iron-nickel alloy, iron-cobalt alloy, ferrite, metallic nickel and metallic cobalt, which have good stability when changing the frequency of the initial magnetic permeability and have good magnetic induction and high magnetic permeability. It should be understood that the magnetically conductive metal powder can be any of these metal powders or a combination of any two or more of these metal powders. The magnetically conductive porous heating block 200 is manufactured by mixing a plurality of parts of a magnetically conductive metal powder, a plurality of parts of a ceramic powder, a plurality of parts of a sintering additive, and a plurality of parts of paraffin, and sintering said raw materials at a high sintering temperature of 600-1300°C to form a magnetically conductive porous structure. Some specific embodiments of the invention and the results of operational tests are given in the table below:

[0052] Table 1 Specific embodiments of the invention and results of operational tests of a magnetically conductive porous heating block

Paragraph Magnetically conductive metal powder (parts) Ceramic powder (parts) Sintering additive (parts) Paraffin (parts) Operational tests Porosity % Average pore size/µm Implementation option 1: 50 0 0 0 38 9,3541 Implementation option 2: 60 30 0 0 42 9,7856 Implementation option 3: 55 0 40 0 57 8,3421 Implementation option 4: 85 0 0 30 46 10,1247 Implementation option 5: 75 15 20 16 67 7,0134 Implementation option 6: 80 20 10 20 69 8,6953 Implementation option 7: 95 10 30 10 53 7,9632 Implementation option 8: 68 25 1 0 47 7,2311 Implementation option 9: 92 0 15 27 34 5,3217 Implementation option 10: 88 7 25 2 42 54,2134

[0053] Embodiment 2: As shown in Fig. 8 and Fig. 9, the atomizing heating device comprises a housing 10, a mouthpiece 20 and a liquid tank 30, wherein the atomizing heating unit 40 according to embodiment 1 is disposed below the liquid tank 30, the atomizing heating unit 40 comprises a porous liquid transfer block 100 and a magnetically conductive porous heating block 200, a sealing member 50 is disposed between the atomizing heating unit 40 and the liquid tank 30, a sealing member 50 is disposed between the liquid tank 30 and the mouthpiece 20, an air passage is formed between the corresponding sealing member 50 and the mouthpiece 20, in order to improve the smoking sensation of users, a liquid-absorbing cotton 60 is disposed at the air outlet end of the corresponding sealing member 50 for absorbing unatomized cigarette liquid, the cigarette liquid is stored in the liquid tank 30, the liquid tank 30 supplies the liquid to the atomizing heating unit 40, and the atomizing heating unit 40 the unit 40 is sealed by a corresponding sealing element 50 for preventing leakage or seepage of liquid from the atomizing heating unit 40. When the atomizing heating device operates, air enters the atomizing heating unit 40 from the housing 10, the liquid reservoir 30 supplies liquid to the atomizing heating unit 40, the porous liquid transfer unit 100 transfers the cigarette liquid to the magnetically conductive porous heating unit 200, the magnetically conductive porous heating unit 200 atomizes the cigarette liquid by electromagnetic induction to form atomizing vapor, the atomizing vapor is mixed with air to form an aerosol, and the aerosol flows through the air passage to the mouthpiece 20 for subsequent inhalation by users.

Claims (23)

1. A spray heating unit comprising a liquid transfer unit and a heating unit, wherein said liquid transfer unit is a porous liquid transfer unit (100) and said heating unit is a magnetically conductive porous heating unit (200), wherein the porous block (100) for transferring liquid is made in the form of a porous structure with micron-sized pores formed by high-temperature sintering of an inorganic non-metallic filler and a binder, the magnetically conductive porous heating block (200) is made in the form of a magnetically conductive porous structure formed by direct high-temperature sintering of particles of a magnetically conductive material or high-temperature sintering of particles of a magnetically conductive material and a binder, wherein the magnetically conductive porous heating block (200) is at least inserted into the surface of the porous block (100) for transferring liquid or attached to it, and the open surface of the magnetically conductive porous heating block (200) located in the spray channel forms a spray surface (21). 2. The spray heating unit according to claim 1, characterized in that the magnetically conductive porous heating block (200) is made from the following starting materials: 50-100 parts of magnetically conductive metal powder, 0-30 parts of ceramic powder, 0-40 parts of sintering additive and 0-30 parts of paraffin. 3. The spray heating unit according to claim 2, characterized in that the magnetically conductive metal powder is at least one of pure iron, low-carbon steel, iron-aluminum alloy, iron-silicon alloy, iron-nickel alloy, iron-cobalt alloy, ferrite, metallic nickel and metallic cobalt. 4. A spray heating unit according to claim 1, characterized in that the binder is glass powder or glaze and has a melting point of 600-1300°C. 5. A spray heating unit according to claim 1, characterized in that the part of the surface of the porous block (100) for transferring liquid, which is in contact with the sealing element, is not provided with a magnetically conductive porous heating block (200). 6. A spray heating unit according to claim 1, characterized in that the thickness of the porous block (100) for transferring liquid is greater than the thickness of the magnetically conductive porous heating block (200). 7. A spray heating unit according to claim 1, characterized in that the thickness of the part of the magnetically conductive porous heating block (200) provided with a spray surface (21) is greater than the thickness of other parts of the magnetically conductive porous heating block (200). 8. A spray heating unit according to claim 1, characterized in that the element (300) for directing air, designed with the possibility of directing air and increasing the spray area, is located on the spray surface (21) of the magnetically conductive porous heating block (200) in the direction of the air flow. 9. A spray heating unit according to claim 8, characterized in that a plurality of columns of said elements (300) for directing air are located in the direction of the air flow, and gaps are provided between said plurality of columns of said elements (300) for directing air. 10. A spray heating unit according to claim 9, characterized in that in the direction of the air flow, the elements (300) for directing the air, located in the same column, are arranged intermittently or continuously. 11. A spray heating unit according to claim 9, characterized in that the elements (300) for directing air are arranged parallel, radially or staggered relative to each other. 12. A spray heating unit according to any one of paragraphs 8-11, characterized in that the element (300) for directing air is a protrusion for directing air, the cross-section of which has a polygonal shape, a curvilinear shape, or a combination of both. 13. A spray heating unit according to any one of claims 8 to 11, characterized in that the air guiding element (300) is at least one of an air guiding groove, an air guiding rib, and an air guiding protrusion. 14. A spray heating unit according to item 1, characterized in that the porous block (100) for transferring liquid is formed in the form of a plate structure, a cup-shaped structure, a groove structure or a cylindrical structure; the magnetically conductive porous heating block (200) is made in the form of a plate structure inserted into the middle of the side wall of the porous block (100) for transferring liquid, or the magnetically conductive porous heating block (200) is made in the form of a cylindrical structure inserted into the middle of the inner wall or the outer wall of the porous block (100) for transferring liquid; the spray surface (21) of the magnetically conductive porous heating block (200) extends beyond the side surface of the porous block (100) for transferring liquid or is made flush with the side surface of the porous block (100) for transferring liquid. 15. The spray heating unit according to claim 14, characterized in that the surface (11) for liquid inflow, located on the porous block (100) for liquid transfer, is at least one of a flat surface, a curved surface and a grooved surface, and the spray surface (21) is at least one of a flat surface and a curved surface. 16. A spray heating unit according to claim 15, characterized in that an opening (12) for transferring liquid or a groove (13) for transferring liquid is formed in the surface (11) for the inflow of liquid of the porous block (100) for transferring liquid. 17. A spray heating device comprising a housing (10), a mouthpiece (20) and a liquid reservoir (30), characterized in that the spray heating unit according to any of paragraphs 1-16 is located under the liquid reservoir (30), and a sealing element (50) is located between the spray heating unit and the liquid reservoir (30).