CN217958729U - Electromagnetic heater for heating water pipe and water pipe electromagnetic heating device - Google Patents

Abstract

The utility model discloses an electromagnetic heater and shredded tobacco for water pipes electromagnetic heating device for shredded tobacco for water pipes heating, include the casing and install the electromagnetic heating main part in the casing, the casing is including thermal-insulated chassis, the electromagnetic heating main part includes excitation coil and drive circuit, excitation coil is the slice and is formed by the wire outwards spiraling gradually around a center, the excitation coil orientation thermal-insulated chassis direction, drive circuit control excitation coil to the thermal-insulated chassis sends the high frequency alternating current signal that can make electromagnetic induction spare produce the eddy current effect outward. The utility model also discloses a shredded tobacco for water pipes electromagnetic heating device. The utility model discloses part excitation coil and electromagnetic induction spare, locate cigarette bowl department with electromagnetic induction spare, make excitation coil slice, can make electromagnetic induction spare produce the eddy current effect to the electromagnetic induction spare high efficiency output high frequency alternating signal of opposite side, electromagnetic induction spare generates heat thereupon with the smog formation in the heating cigarette bowl, heating efficiency is high and safe and reliable.

Description

Electromagnetic heater for heating water pipe and water pipe electromagnetic heating device

Technical Field

The utility model relates to a hookah heating especially relates to the hookah heating carbon for hookah heating.

Background

The water tobacco of Arabic, which originates from India and is mainly popular in Arabic countries, generally comprises a tobacco bowl 11 for containing tobacco shreds 10 or tobacco paste, a tobacco bottle 12 for containing filtered water 121, and a tobacco pipe 122 arranged on the side wall of the tobacco bottle 12, wherein the bottom of the tobacco bowl 11 is provided with a vent pipe 111 communicated with the interior of the tobacco bowl 11, and a filter pipe 13 is communicated with the vent pipe 111 and the filtered water 121 in the tobacco bottle 12, referring to fig. 1. When the cigarette bowl is used, water is firstly filled in the cigarette bottle 12, the filtered water 121 just needs to submerge the filter pipe 13, the water level is not too high, the cigarette bowl 11 is placed on the cigarette bottle 12, the vent pipe 111 of the cigarette bowl 11 is inserted into the filter pipe 13, and the silica gel sealing ring 14 is arranged between the cigarette bowl 11 and the upper portion of the cigarette bottle 12. Then, the tobacco shred 10 is put into the tobacco bowl 11, the whole tobacco shred put into the tobacco bowl is wrapped by a small piece of tin foil, the air holes are pricked on the tobacco shred put into the tobacco bowl, the burnt charcoal is put on the tin foil pricked with the air holes, the smoke extraction pipe 15 is inserted on the smoke pipe 122, and then the cigarette holder at the tail end of the smoke extraction pipe 15 can be taken up to smoke. When smoking, the charcoal heats the tobacco shred 10 in the tobacco bowl 11 through the tin foil to burn the tobacco shred, and when smoking from the outside of the smoking pipe 15, air enters the tobacco bowl 11 through the air holes on the tin foil, passes through the tobacco shred 10, enters the filtered water 121 through the filter pipe 13, is filtered, and then passes through the smoking pipe 15 from the smoke pipe 122 to be smoked by people.

However, the traditional hookah heating technology is complex in operation, and the temperature of the charcoal is uncontrollable, so that the smoke smell is not strong enough. In addition, the charcoal burns to generate harmful gas in the smoking process, the charcoal is harmful to human bodies after being inhaled, and the charcoal burns to be in an open fire state, so that fire disasters are easy to generate. Charcoal produces charcoal ash after combustion, which pollutes the environment.

For this reason, patent CN203952409U discloses an electrically heated tobacco bowl, in which a heated metal tube is directly disposed at the bottom of the tobacco bowl, and an eddy current coil is wound on the heated metal tube, so that when in use, the heated metal tube can be directly heated by the eddy current coil, and the heated metal tube generates heat and scorches tobacco shreds. However, after the electrically heated water cigarette bowl is used, the cigarette bowl is difficult to clean, after the electrically heated water cigarette bowl is used for a long time, too much scorched smoke stain is accumulated under the cigarette bowl, the heating efficiency of the cigarette bowl is extremely low, the heating source is arranged at the bottom of the cigarette bowl, air hardly enters the heating part in a balanced manner, the combustion uniformity of tobacco shreds is insufficient, and the effect is very poor when the tobacco shreds are sucked at the initial stage.

However, when the electronic water smoke carbon is used, on one hand, air holes in the tin foil can be blocked, so that air is difficult to enter a cigarette bowl, the smoking amount is limited, and when the electronic water smoke carbon is used for smoking by multiple people, the effect is poor; on the other hand, this kind of shredded tobacco for water pipes electron carbon can only be through heat conductivility heating tinfoil, then through the shredded tobacco of tinfoil heating, if current shredded tobacco for water pipes charcoal is the same, heating efficiency is poor, even in order to increase heating efficiency, often needs a power very big, and the very big transformer of volume supplies power.

Therefore, there is a need for a hookah heating device that can solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electromagnetic heater and shredded tobacco for water pipes electromagnetic heating device for shredded tobacco for water pipes heating, heating efficiency is high, safe and reliable.

In order to realize the above-mentioned purpose, the utility model discloses an electromagnetic heater for hookah heating, include the casing and install the electromagnetic heating main part in the casing, the casing is including thermal-insulated chassis, the electromagnetic heating main part includes excitation coil and drive circuit, excitation coil is the slice and is formed by the wire outwards spiraling gradually around a center, the excitation coil orientation thermal-insulated chassis direction, drive circuit control excitation coil to it can make electromagnetic induction spare produce the high frequency alternating signal of eddy current effect to send outside the thermal-insulated chassis.

Preferably, the heat insulation base plate is a ceramic plate or a mica piece, so that the heat insulation effect is good, interference on the passing of high-frequency alternating current signals is avoided, and the cost is low. Of course, the insulating bottom plate can also be made of other non-magnetic non-metal insulating materials, and is not limited to a ceramic plate.

Preferably, the heat insulation chassis is convexly provided with a plurality of supporting legs for supporting the shell, and the supporting legs can be supported above the cigarette bowl and form an air inlet communicated with the interior of the cigarette bowl between the heat insulation chassis and the cigarette bowl. The utility model discloses electromagnetic inductor bottom is provided with a plurality of supporting legss and can props up electromagnetic inductor's casing to form the inlet port between electromagnetic inductor and bowl, the air admission bowl of being convenient for can make the aerosol resultant fill the discharge burning, and smoking is experienced well. Wherein, the heat insulation chassis can be directly supported on the cigarette bowl or indirectly supported on the cigarette bowl.

Specifically, the supporting legs are distributed around the center of the heat insulation chassis, and a heating area corresponding to the position of the excitation coil is formed in the surrounding middle of the supporting legs.

Specifically, the supporting legs are arranged at the position, close to the edge, of the heat insulation chassis, and the supporting legs are convenient to support on the cigarette bowl.

Preferably, an outer boss protrudes outwards from the middle of the heat insulation chassis, a pit recessed in the periphery is formed on the back of the outer boss in the shell, and the excitation coil is installed in the pit.

Specifically, outer boss mesa place horizontal plane is less than the supporting legs is terminal, the supporting legs set up in the thermal-insulated chassis closes on the position duplex winding at border the central distribution of thermal-insulated chassis, just the supporting legs support in when the bowl mouth of cigarette bowl is gone up, outer boss stretches into in the cigarette bowl.

More specifically, outer boss periphery is outwards provided along the protruding a plurality of block lugs that are formed with, the block lug with the supporting legs is crisscross to be set up, the block lug outside with distance between thermal-insulated chassis center more than or equal to the supporting legs inboard with distance between the thermal-insulated chassis center is less than the distance of the supporting legs outside to thermal-insulated chassis center, just the terminal slope in block lug outside is in order to form the guide wall, and the outer boss of being convenient for stretches into in the cigarette bowl.

Preferably, electromagnetic heater still can cover the heat-resisting bowl lid on the cigarette bowl, heat-resisting bowl cover the upper surface with the concave chamber that holds that is equipped with in bowl mouth complex position of cigarette bowl, set up the through-hole that runs through on the diapire that holds the chamber, protruding being equipped with in the middle of the thermal-insulated chassis with hold the outer boss of the unsmooth complex in chamber, the casing activity erects to be located heat-resisting bowl is covered, outer boss stretches into hold the chamber, and makes form the inlet port with outside intercommunication between heat-resisting bowl lid and the thermal-insulated drain pan, just the inlet port with the through-hole intercommunication.

Preferably, the electromagnetic heating body further comprises a control unit and a power supply unit, the power supply unit supplies power to the driving circuit, and the control unit controls the driving circuit to operate.

Specifically, the casing includes top shell, drain pan, and install in the separation lid between top shell and the drain pan, the top shell with form the installation between the separation lid the first cavity of control unit and power supply unit, the separation lid with form the installation between the drain pan the second cavity of excitation coil, the separation lid is kept apart first cavity and second cavity, thermal-insulated chassis forms the diapire of drain pan. The isolation cover can effectively isolate the control power supply part and the electromagnetic generation part (excitation coil) of the electromagnetic heating body, and prevent heat and electromagnetic influence between the control power supply part and the electromagnetic generation part (excitation coil).

Specifically, the middle of the isolation cover is recessed towards the second cavity to form an isolation cavity, the isolation cavity is different from the first cavity, an inner boss protruding outwards is formed on one side, back to the isolation cavity, of the isolation cover, and the excitation coil is installed between the inner boss and the heat insulation base plate.

Specifically, the excitation coil is mounted on the inner boss and has a distance from the heat insulation chassis.

Specifically, the bottom shell comprises an annular fixing frame and a heat insulation chassis clamped on the annular fixing frame.

Preferably, a handle for holding is formed outside the housing.

Preferably, an electromagnetic shielding sheet is arranged on one side of the excitation coil, which is far away from the heat insulation chassis, and the excitation coil is mounted on the electromagnetic shielding sheet. The electromagnetic shielding sheet can effectively prevent the electromagnetic field of the exciting coil from influencing the control power supply part of the first chamber.

Preferably, the electromagnetic shielding plate is provided with a radius hole communicating from the edge to the center, and the excitation coil is gradually and inwardly coiled from the edge to the center along the first end thereof and then led out of the second end of the excitation coil along the radius hole.

Preferably, the length of the cross section of the wire of the excitation coil in the radial direction is greater than the length of the cross section of the wire of the excitation coil in the direction of the center line of the excitation coil, so that the electromagnetic induction piece can form eddy current induction, energy is saved, heating efficiency is high, and the electromagnetic induction piece can form eddy current induction conveniently.

The utility model also discloses a shredded tobacco for water pipes electromagnetic heating device, including electromagnetic heater and electromagnetic induction spare, the electromagnetic induction spare is installed in cigarette bowl department, electromagnetic heater as above, install in cigarette bowl top makes thermal-insulated chassis with the bowl mouth of cigarette bowl is relative, electromagnetic heater's excitation coil sends high frequency alternating signal so that the electromagnetic induction spare of cigarette bowl department produces eddy current effect.

Preferably, the electromagnetic induction piece is a tin foil wrapped on the mouth of the bowl, a metal sheet arranged on the mouth of the bowl, or an electromagnetic induction piece placed in the bowl, the tin foil or the metal sheet is provided with a plurality of vent holes, and the electromagnetic induction piece heats the smoke generation object in the bowl to generate smoke.

Preferably, the electromagnetic induction part is installed on the mouth of the tobacco bowl and is provided with a tobacco containing groove, the tobacco containing groove is used for containing smoke generation substances, the electromagnetic induction part heats the smoke generation substances in the tobacco containing groove, the bottom of the tobacco containing groove is provided with a vent hole communicated with the tobacco bowl, air enters the tobacco containing groove to assist combustion to generate smoke, and the generated smoke passes through the vent hole to enter the tobacco bowl and enters the tobacco bottle of hookah through the vent pipe in the tobacco bowl. This scheme makes smoke generator need not to place in the cigarette bowl, can put on the electromagnetic induction spare, and the heating is convenient, and is efficient.

Compared with the prior art, the utility model discloses an electromagnetic heater heats aerosol (pipe tobacco, cigarette cream etc.), during the use, can adopt traditional mode parcel tin paper as electromagnetic induction spare on the bowl of cigarette, also can put the electromagnetic induction spare that can contact aerosol on bowl of cigarette or bowl of cigarette, then directly put electromagnetic heater on the bowl of cigarette, excitation coil through electromagnetic heater makes the electromagnetic induction spare produce eddy current effect for electromagnetic induction spare generates heat and makes aerosol burning to aerosol heating. On the one hand, the utility model discloses an electromagnetic inductor heats electromagnetic induction spare, and heating efficiency is high, and is little to the power demand of power supply ware. On the other hand, the utility model discloses excitation coil is the slice and is formed around a center outwards convoluteing gradually by the wire, can directly make the electromagnetic induction spare in the thermal-insulated chassis outside directly generate heat under eddy current effect and light aerosol, need not other part heat conduction, has further increased aerosol's heating efficiency. Still on the other hand, the utility model discloses an electromagnetic induction spare only accepts electromagnetic heater's high frequency electromagnetic signal to the heating of heaing up, the electromagnetic induction spare itself of heating usefulness does not carry out electrical connection with any circuit, has improved the stability and the reliability of system by a wide margin.

Drawings

Fig. 1 is a structural view of a conventional hookah.

Fig. 2 is a perspective view of the electromagnetic heater of the present invention.

Fig. 3 is a plan view of the electromagnetic heater of the present invention.

Fig. 4 is an exploded perspective view of the electromagnetic heater of the present invention.

Fig. 5 is a structural diagram of the installation of the field coil and the electromagnetic shielding sheet of the present invention.

Fig. 6 is a structural diagram of the present invention in which the excitation coil and the electromagnetic shielding plate are installed at another angle.

Fig. 7a is a block diagram of the electromagnetic heater of the present invention.

Fig. 7b is a structural diagram of a driving circuit according to an embodiment of the present invention.

Fig. 7c is a structural diagram of a driving circuit according to another embodiment of the present invention.

Fig. 7d is a structural diagram of a driving circuit according to another embodiment of the present invention.

Fig. 7e is the main circuit diagram of the water pipe electromagnetic heating device of the present invention.

Fig. 8 is a structural view of the electromagnetic hookah heating device according to the first embodiment of the present invention.

Fig. 9 is a side view of the electromagnetic hookah heating device according to the first embodiment of the present invention.

Fig. 10 is a structural view of an electromagnetic induction member according to a first embodiment of the present invention.

Fig. 11 is a structural view of the electromagnetic heating device for hookah according to the second embodiment of the present invention.

Fig. 12 is a structural view of the electromagnetic hookah heating device according to the third embodiment of the present invention.

Fig. 13 is a structural view of a hookah electromagnetic heating device installed on a hookah in another embodiment different from the first embodiment of the present invention.

Fig. 14 is a structural view of the hookah electromagnetic heating device according to the second embodiment of the present invention.

Fig. 15 is a structural view of the electromagnetic heating device for hookah according to the third embodiment of the present invention.

Detailed Description

In order to explain the technical contents, structural features, objects and effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

Referring to fig. 8 and 9, the utility model discloses a hookah electromagnetic heating device, including electromagnetic heater 200 and electromagnetic induction spare 40, electromagnetic induction spare 40 is installed on the bowl 11 of hookah and can contact the aerosol 10 (pipe tobacco or cigarette cream) in the bowl 11, have excitation coil 31 and drive circuit 32 among the electromagnetic heater 200, drive circuit 32 can drive excitation coil 31 and send high frequency alternating signal so that electromagnetic induction spare 40 produces the eddy current effect.

Referring to fig. 2 to 4, the electromagnetic heater 200 includes a housing 20 and an electromagnetic heating body 30 installed in the housing 20, the housing 20 includes a heat insulation chassis 21, the electromagnetic heating body 30 includes an excitation coil 31 and a driving circuit 32, the excitation coil 31 is in a sheet shape and is formed by a conducting wire 311 that is gradually coiled outwards around a center, the excitation coil 31 faces the heat insulation chassis 21, and the driving circuit 32 controls the excitation coil 31 to emit a high-frequency alternating current signal outside the heat insulation chassis 21, which can generate an eddy current effect on the electromagnetic induction member 40. The excitation coil 31 is formed by winding a wire 31 in a plane.

In this embodiment, the electromagnetic induction part 40 is movably mounted on the bowl 11 of the hookah and can contact the aerosol 10 (cut tobacco or tobacco paste) in the bowl 11, the electromagnetic heater 200 is movably mounted on the electromagnetic induction part 40, the electromagnetic induction part 40 is provided with a through vent hole 41 at the bowl opening of the bowl 11, and a high-frequency alternating-current signal can be sent to the electromagnetic induction part 40 to enable the electromagnetic induction part 40 to generate an eddy current effect. The electromagnetic heater 200 has an exciting coil 31 and a driving circuit 32, and the driving circuit 32 can drive the exciting coil 31 to emit a high frequency alternating current signal to generate an eddy current effect on the electromagnetic induction member 40. Wherein, the utility model discloses a setting up to can be in the horizontal (the direction parallel with the bowl mouth) slightly remove (non-joint), vertical (with the central parallel direction of cigarette bowl) freely take up's mounting structure, when taking up electromagnetic induction spare 40, can not drive cigarette bowl 11, can directly take up.

Referring to fig. 9, when the electromagnetic inductor 200 is movably erected on the electromagnetic induction member 40, an air inlet 210 communicating with the outside is provided between the electromagnetic heater 200 and the electromagnetic induction member 40, and the air inlet 210 is further communicated with the vent 41. The heat insulation chassis 21 is convexly provided with a plurality of supporting legs 211 for supporting the shell 20, and the supporting legs 211 can be supported on the smoke bowl 11 and form an air inlet 210 communicated with the smoke bowl 11 between the heat insulation chassis 21 and the smoke bowl 11. The supporting leg 211 can be located at the edge of the heat insulation chassis 21, or at the middle of the heat insulation chassis 21, and the heat insulation chassis 21 is suspended on the cigarette bowl. The electromagnetic induction member 40 is a metal sheet erected at the mouth of the cigarette bowl 11.

Referring to fig. 1 and 8, the electromagnetic induction member 40 is spaced from the ventilation tube 111 in the bowl 11. When smoking, the driving circuit 32 can drive the excitation coil 31 to emit a high-frequency alternating current signal to enable the electromagnetic induction part 40 to generate a vortex effect, so that the electromagnetic induction part 40 heats the aerosol generating substance 10, the aerosol generating substance 10 generates aerosol, when a person smokes the smoking pipe 15, air enters the vent hole 41 from the air inlet 210, enters the smoking bowl 11 from the vent hole 41, enters the aerosol ventilating pipe 111 generated in the smoking bowl 11 into the filter pipe 13, enters the filter water 121 from the filter pipe 13, is filtered, and then passes through the smoking pipe 15 from the smoking pipe 122 to be smoked by the person.

Referring to fig. 8 and 10, in the present embodiment, the electromagnetic induction member 40 mounted on the smoking bowl 11 includes a peripheral edge 42 and a central heating portion 43 with a downward concave middle, the peripheral edge 42 is supported on the rim of the bowl mouth of the smoking bowl 11 and closes the rim of the bowl mouth to prevent smoke from overflowing from the rim of the bowl mouth, the lower surface of the central heating portion 43 is recessed in the smoking bowl 11, and the peripheral edge 42 is matched to make the electromagnetic induction member 40 form a bowl cover covering the smoking bowl 11 at the same time. In this embodiment, the heating portion 43 is a circular groove. Of course, the heating portion 43 may be a square groove or another groove.

Referring to fig. 13, in another embodiment, the heating portion 43a may also be an annular groove, in which case, the heating portion may extend below the top end of the ventilation pipe 111 of the smoking bowl, or may extend only above the ventilation pipe 111.

In the above embodiment, the heating member 40 may be a single member, and the peripheral portion and the central portion of the heating member 40 are a single member made of the same material as the heating portion 43 a. In another embodiment, the heating member 40 may be a fitting member, the central portion and the heating portion 43a may be made of different materials, and the central portion opposite to the air pipe 111 may be made of a non-magnetic and heat-resistant material, such as a ceramic material.

Wherein, the electromagnetic induction member 40 further comprises an operating handle 44 formed by extending the peripheral edge 42 outwards, and the user can use the clamp to clamp the operating handle 44 to take the electromagnetic induction member 40 which is finished to be used off the smoking bowl 11. The operation part 44 is provided with a hanging hole 441, and a user can hang the electromagnetic induction part 40 on the hook through the hanging hole 441 for storage.

In the present embodiment, the electromagnetic induction member 40 is formed by stamping a metal sheet (for example, a tinplate sheet, a stainless steel sheet, or the like), and may be made of other electromagnetically-inductible materials or materials containing metal substances.

Referring to fig. 8, a space is provided between the heat insulation chassis 54 and the heating portion 43 of the electromagnetic induction element 40 to form a heating cavity 400, one end of the heating cavity 400 is communicated with the air inlet hole 210, and the other end is communicated with the vent hole 41, when smoking, external air enters the heating cavity 210 through the air inlet hole 41, and enters the smoking bowl 11 from the vent hole 41 after being heated by the electromagnetic induction element 40 at the heating cavity 210. Put electromagnetic heater 200 on electromagnetic induction piece 40 and open the switch, electromagnetic induction piece 40 can produce the eddy current effect and generate heat, if not smoking, then stay the air of heating chamber 400 department and can heat under the effect of electromagnetic induction piece 40 for the electromagnetic induction piece outside is the hot-air, makes during smoking on the one hand, and the outside air that gets into in aerosol 10 is the warm air, and smoking is experienced well, on the one hand, also makes the temperature in the bowl of cigarette high enough and stable, and the temperature variation of electromagnetic induction piece 40 is little, and the burning of aerosol 10 is stable.

In one embodiment, in order to better cover the smoking bowl 11, the peripheral edge 42 of the electromagnetic induction member 40 is further provided with a downward bent edge which is bent downward to wrap the peripheral edge of the smoking bowl 11, and an operating handle 44 is formed at the end of the downward bent edge.

Referring to fig. 2 and 3, the supporting legs 211 are distributed around the center of the heat insulation chassis 21, and a heating area corresponding to the position of the exciting coil 31 is formed in the middle surrounded by a plurality of supporting legs 211. Specifically, the supporting legs 211 are disposed at a position close to the edge of the heat insulation chassis 21.

Referring to fig. 2, 3 and 8, an external boss 212 protrudes outward from the middle of the insulating base plate 21, a recess recessed at the peripheral edge is formed in the back of the external boss 212 in the housing 20, and the exciting coil 31 is installed in the recess.

Specifically, the horizontal plane of outer boss 212 mesa is less than supporting legs 211 is terminal, supporting legs 211 set up in the position that thermal-insulated chassis 21 is close to the border and around thermal-insulated chassis 21 central distribution, just supporting legs 211 support in when the bowl mouth of cigarette bowl 11 is gone up, outer boss 212 stretches into in the cigarette bowl 11.

In this embodiment, the supporting legs 211 are supported on the peripheral edge 42 of the electromagnetic induction member 40, and the outer bosses 212 extend into the recesses of the central heating portion 43 and are in concave-convex fit with the heating portion 43 of the electromagnetic induction member 40. The radius of the outer boss 212 is smaller than that of the heating part 43, and the distance from the outer boss 212 to the end of the supporting leg 211 is smaller than the depth of the heating part 43.

Referring to fig. 2 and 3, a plurality of guide protrusions 213 are formed on the outer boss 212 in an outward protruding manner, the guide protrusions 213 are staggered with the support legs 211, a distance between the outer side of the guide protrusions 213 and the center of the heat insulation base plate 21 is greater than or equal to a distance between the inner side of the support legs 211 and the center of the heat insulation base plate 21, and is smaller than a distance between the outer side of the support legs 211 and the center of the heat insulation base plate 21, and the outer ends of the guide protrusions 213 are inclined to form guide walls (as shown in fig. 2, the guide walls are used for guiding the outer boss 212 into the concave pits of the heating portion 43).

Wherein, a plurality of guiding channels are formed between adjacent guiding projections 213, particularly extending along the central line direction (longitudinal direction) of the cigarette holder 11, the heating cavity 400 is formed between the outer boss 212 and the heating part 43, and the guiding channels are positioned above and outside the heating cavity 400. This arrangement requires that air first travel down the air inlet holes for a period of time to enter the heating chamber 400 horizontally. Wherein, the air intake holes 210 are located at the upper outer side of the heating chamber 400, and the guiding channel extends from the top to the bottom. In this embodiment, the guide channel is a longitudinal channel from top to bottom and does not extend axially in the outer boss 212, but in another embodiment, the guide channel may be a spiral channel spiraling outside the outer boss.

In this embodiment, the bottom of the heating portion 43 of the electromagnetic induction element 40 is a flat sheet parallel to the entrance of the cigarette container 11, and the position of the bottom case 21 opposite to the heating portion 43 is a flat sheet, so that the heating chamber 400 is flat. Of course, the bottom of the heating portion 42 of the electromagnetic sensor 40 may have a tapered shape, a triangular shape inclined downward, a tapered shape, a spherical shape, or the like, and is not limited to a sheet shape.

Preferably, the electromagnetic heating body 30 further includes a control unit 33 and a power supply unit, the power supply unit supplies power to the driving circuit 32, and the control unit 33 controls the driving circuit 32 to operate.

Referring to fig. 7a, it is a circuit block diagram of the electromagnetic heating body 30 of the present invention. The power supply unit includes an electric storage battery 341, a charging management unit 342, a power management unit 343, and a dc interface 345, the dc interface 345 is connected to the electric storage battery 341 through the charging management unit 342, the charging management unit 342 manages charging and discharging of the electric storage battery 341, and the power management unit 342 converts electric energy in the electric storage battery into corresponding voltage and transmits the voltage to the driving circuit 32 to supply power to the driving circuit 32.

The power supply unit further includes an auxiliary power supply 344, the auxiliary power supply 344 is connected to the power management unit 342 through a power supply interface 347, the external commercial power is converted into a power supply voltage and transmitted to the power management unit 342, and the power supply voltage is converted into a corresponding voltage by the power management unit 342 and transmitted to the driving circuit 32 to supply power to the driving circuit 32.

The dc interface 345 is further connected to a power management unit 343, and the power management unit 343 converts the electric energy input by the dc interface 345 into a corresponding voltage and transmits the voltage to the driving circuit 32 to power the driving circuit 32. The dc interface 345 may be a USB interface, a mrico USB, a type-c, or other dc power supply interface. In the present embodiment, the storage battery 341 is a lithium battery.

As described above, the present embodiment has three power input modes: the auxiliary power supply supplies power, the direct current interface supplies power and the storage battery supplies power. The control unit 33 is connected to the power management unit 342, and controls the power management unit 342 to select the power input mode according to the priority, wherein the priority is from top to bottom: auxiliary power supply, direct current interface power supply and storage battery power supply. The power management unit 342 designs different topologies, such as a pass-through mode, a boost mode, a buck mode, and a buck-boost mode, according to different input voltages.

Referring to fig. 7e, which is a schematic circuit diagram of the electromagnetic heating body 30, the circuit includes three power inputs provided by the power supply unit: auxiliary power supply V _DC DC interface power supply V _USB And storage battery supply V _BAT The power management unit 342 converts the power inputted by different power input modes into the voltage required by the driving circuit 32, and the driving circuit 32 is drivenThe control unit 33 controls the LC network to output a corresponding high-frequency ac signal, the LC network includes a resonant capacitor and a resonant inductor (exciting coil 31) connected in series, the LC network transmits the high-frequency ac signal to the electromagnetic induction member 40, and the electromagnetic induction member 40 receives the high-frequency ac signal to generate an eddy current effect, thereby generating heat. The electromagnetic heating body 30 further has a voltage detection circuit 331 and a current detection circuit 332, which collect the voltage across the LC network and the current on the exciting coil 31, respectively, and transmit the detected voltage and current to the control unit 33.

When a high-frequency ac signal is transmitted to the electromagnetic induction element 40, an induced current is generated on the electromagnetic induction element 40, since the resistivity of the electromagnetic induction element 40 changes with temperature, in a normal temperature range, the resistivity of the electromagnetic induction element 40 changes linearly with temperature, and the change relationship can be expressed as: ρ = ρ 0 (1 + α t), where ρ and ρ 0 are the resistivities at the current temperatures t ° c and 0 ℃, respectively; α is a temperature coefficient of the resistivity of the electromagnetic induction member 40, and t is a temperature value of the electromagnetic induction member. Therefore, the change in the resistance of the electromagnetic induction member 40 has a linear relationship with the change in the temperature. Namely: t = (R-R0)/(R0 x α), where R and R0 are resistance values at the current temperature t ℃ and 0 ℃ respectively, and α is a temperature coefficient of the resistivity of the electromagnetic inductor 40. According to the formula: when the temperature rises, the resistance of the electromagnetic induction member 40 also increases; the current in the loop of the LC network is reduced, and the power fed back to the driving circuit 32 is reduced, i.e. the power in the driving loop of the LC network is reduced. The power of the drive circuit is linear with the temperature of the electromagnetic induction member 40. The following is derived from the power calculation formula P = UI: the temperature of the electromagnetic induction member 40 can be calculated by calculating the power of the driving circuit. The current value, the voltage value, the power temperature coefficient, the set temperature and the like of the driving circuit corresponding to the temperature control are stored in the memory of the control unit 33, after the whole system is started, the control unit 33 obtains the current and the voltage in the driving circuit detected by the voltage detection circuit 331 and the current detection circuit 332 in real time, calculates the power of the driving circuit according to the current and the voltage, calculates the temperature of the electromagnetic induction element 40 according to the power temperature coefficient, compares the set temperature with the temperature of the electromagnetic induction element 40, and when the temperature of the electromagnetic induction element 40 is greater than the set value, the control unit 33 controls the driving circuit 32 to suspend outputting the control signal to the LC network, and the electromagnetic induction element 40 suspends heating. When the temperature of the electromagnetic induction member 40 is less than the set value, the driving circuit 32 continues to output the control signal to the LC network, and the electromagnetic induction member 40 continues to heat, thereby performing temperature control.

Preferably, in the temperature control process, the detected temperature of the electromagnetic induction part 40 is integrated in real time, the upper limit value and the lower limit value of the temperature integration are determined in advance, and when the temperature integration rapidly exceeds the upper limit value, smoking is determined, and the number of smoking openings is counted.

The control unit 33 includes an MCU, a switch button 333 and a detection circuit, wherein when the switch button 333 is pressed, a start command can be input, and the MCU performs a working state according to the start command to control the driving circuit 32 to work. Certainly, the MCU also detects whether there is an electromagnetic induction component through the detection circuit, and if not, it enters a standby state to detect with a preset frequency, and enters a working state when detecting the electromagnetic induction component. The detection circuit comprises a voltage detection circuit 331 and a current detection circuit 332, and the MCU can judge whether the electromagnetic induction piece exists or not through the voltage and the current collected by the voltage detection circuit 331 and the current detection circuit 332. The MCU, the switch button 333, the detection circuit, and the driving circuit 32 are all mounted on the circuit board 26.

Referring to fig. 7b, in an embodiment, the driving circuit 32 is a full bridge driving circuit, which can greatly improve the working efficiency and save the energy consumption.

The driving circuit 32 is composed of a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, and a MOS transistor Q4, and forms a main loop of the high-frequency signal generating circuit with the LC network. The LC network consists of a resonant capacitor C1 and a resonant inductor L1. The resonant inductor L1 is an inductor equivalent to the exciting coil 31, and R is a resistor equivalent to the electromagnetic inductor, and is configured to receive a high-frequency ac signal transmitted by the inductor L1 to generate heat. Wherein, LC network is the series resonance network, and resonant frequency is:

when the control unit 33 controls the drive circuit 32 to act such that the frequency f = f0 of the drive signal, the circuit will resonate. The time sequence during operation is as follows: when the signal is positive for half a week, the current is VCC- > Q1- > C1- > L1- > Q4- > GND; when the signal is negative for half a week, the current is VCC- > Q2- > L1- > C1- > Q3- > GND.

Referring to fig. 7c, in another embodiment, the driving circuit 32 may be a half-bridge driving circuit.

The driving circuit 32 is composed of a MOS transistor Q5 and a MOS transistor Q6, and forms a main loop of the high-frequency signal generating circuit with the LC network. The LC network consists of a resonant capacitor C1 and a resonant inductor L1. The resonant inductor L1 is an inductor equivalent to the exciting coil 31, and R is a resistor equivalent to the electromagnetic inductor, and is configured to receive a high-frequency ac signal transmitted by the inductor L1 to generate heat. Wherein, LC network is the series resonance network, and resonant frequency is:

when the control unit 33 controls the drive circuit 32 to act such that the frequency f = f0 of the drive signal, the circuit will resonate. The working time sequence is as follows: when the signal is positive for a half cycle, the current is VCC- > Q1- > C1- > L1- > GND; when the signal is negative for half a week, the current is from L1- > C1- > L1- > Q2- > GND.

Referring to fig. 7d, in yet another embodiment, the driving circuit 32 is a class E amplifying circuit.

The driving circuit consists of a MOS transistor Q7, a capacitor C2 and a high-frequency choke coil L0, and forms a main loop of the high-frequency signal generating circuit together with the LC network. The LC network consists of a resonant capacitor C1 and a resonant inductor L1. The resonant inductor L1 is an inductor equivalent to the exciting coil 31, and R is a resistor equivalent to the electromagnetic inductor, and is configured to receive a high-frequency ac signal transmitted by the inductor L1 to generate heat. Wherein, LC network is series resonance network, and resonant frequency is:

when the control unit 33 controls the drive circuit 32 to act such that the frequency f = f0 of the drive signal, the circuit will resonate.

Referring to fig. 4 and 8, the housing 20 includes a top case 22, a bottom case 23, and an isolation cover 24 installed between the top case 22 and the bottom case 23, a first chamber 201 for installing the control unit 33 and the power supply unit is formed between the top case 22 and the isolation cover 24, a second chamber 202 for installing the exciting coil 31 is formed between the isolation cover 24 and the bottom case 23, the isolation cover 24 isolates the first chamber 201 from the second chamber 202, and the heat insulation bottom case 21 forms a bottom wall of the bottom case 23. The insulating cover 24 can effectively insulate the control power supply portion and the electromagnetic generating portion (exciting coil 31) of the electromagnetic heating body 30, reducing the thermal influence and the electromagnetic influence between the control power supply portion and the electromagnetic generating portion (exciting coil 31).

Referring to fig. 4 and 8, the middle of the isolation cover 24 is recessed toward the second chamber 202 to form an isolation cavity 203, the isolation cavity 203 is different from the first chamber 201, one side of the isolation cover 24 facing away from the isolation cavity 203 forms an inward boss 241 protruding outward, and the excitation coil 31 is installed between the inward boss 241 and the heat insulation bottom plate 21.

Referring to fig. 8, the exciting coil 31 is mounted on the inner boss 241 with a space from the insulating bottom plate 21.

In this embodiment, the edge of the isolation cover 24 has a plurality of mounting positions, the isolation cover 24 is mounted on the top shell 22 through the mounting positions, the top shell 22 and the bottom shell 23 have mounting assemblies that are matched with each other, the top shell 22 and the bottom shell 23 are mounted together through the mounting assemblies, when the housing 20 is assembled, the control unit 33 and the power supply unit are mounted in the top shell 22, the isolation cover 24 is mounted on the top shell 22 to seal the first cavity 201, the excitation coil 31 is mounted on the inner boss 241 of the isolation cover 24, and the bottom shell 23 is mounted on the top shell 22 to seal the second cavity 202.

Referring to fig. 4 and 8, the bottom shell 23 includes a circular fixing frame 230 and an insulating bottom plate 21 engaged with the circular fixing frame 230. Referring to fig. 4, the insulating base plate 21 is a ceramic plate. Of course, the insulating bottom plate 21 may be made of other non-magnetic non-metal insulating material, not limited to ceramic plate, such as mica.

In the present embodiment, the insulating bottom plate 21 is made of the same material and is made of a single piece, and in one embodiment, the position of the insulating bottom plate 21 contacting with the electromagnetic induction member 40 is: the supporting leg 211 is made of a high temperature resistant material, and the material of other places not in contact with the electromagnetic induction member 40 has lower requirements on high temperature resistance.

Referring to fig. 2 to 4, a grip 25 is formed outside the housing 20.

Referring to fig. 5 and 8, an electromagnetic shield sheet 35 is disposed on a side of the exciting coil 31 away from the heat insulating bottom plate 21, and the exciting coil 31 is mounted on the electromagnetic shield sheet 35. The electromagnetic shielding sheet may effectively prevent the electromagnetic field of the exciting coil 31 from affecting the control power supply part of the first chamber 201. The electromagnetic shielding sheet can be made of a high-permeability material and is used for shielding metal pieces in other directions from generating an eddy current phenomenon.

Referring to fig. 5 and 6, the electromagnetic shielding plate 35 is formed with a radius hole 351 extending from the edge to the center, and the excitation coil 31 is gradually coiled inward from the edge to the center along a first end thereof and then extends out of a second end of the excitation coil 31 along the radius hole 351.

Referring to fig. 5 and 6, the length of the cross section of the conductive wire 311 of the excitation coil 31 in the radial direction (length in the width direction) is larger than the length in the center line direction (length in the thickness direction), and the surface on which the conductive wire 311 is thick is opposed to the heat insulating base 21.

Preferably, referring to fig. 5 and 6, the conductive wire 311 of the exciting coil 31 is flat (the cross section may be rectangular, oval, etc.), and the flat surface thereof is opposite to the heat insulating bottom plate 21. Of course, the cross section of the conductive wire 311 of the excitation coil 31 may be triangular or trapezoidal. The conductive wire 311 of the excitation coil 31 may be composed of a conductor coated with an insulating layer, or may be composed of a plurality of conductors coated with an insulating layer.

In the above embodiment, the heat insulation chassis 21 of the electromagnetic heater 200 is indirectly erected on the cigarette bowl 11 through the electromagnetic induction part 40, and the heat insulation chassis 21 and the electromagnetic induction part 40 have a concave-convex matching structure for radially limiting, so as to prevent the heat insulation chassis 21 from radially sliding out of the electromagnetic induction part 40.

Of course, in other embodiments, the cross section of the wire of the excitation coil 31 may be circular or square.

In the above embodiment, the electromagnetic induction member 40 is covered on the bowl 11, and the bowl is communicated with the outside air through the vent hole 41.

In the above embodiment, the electromagnetic heater 200 is movably mounted on the electromagnetic induction element 40, and different from the above embodiment, the electromagnetic induction element 40 may also be directly detachably connected to the electromagnetic heater 200, for example, being clamped to the bottom of the casing 20 of the electromagnetic heater 200, or being screwed to the bottom of the casing 20 of the electromagnetic heater 200.

In the above embodiment, the distance between the heat insulating chassis 21 of the electromagnetic heater 200 and the heating portion 43 of the electromagnetic induction member 40 is set to form a flat heating cavity 400, and unlike the above embodiment, the bottom of the induction member 40 and/or the heat insulating chassis 21 is provided with one or more grooves connected to the vent holes 41, one end of one groove is connected to the air inlet hole 210, and the other end is connected to one or more vent holes 41, so that the air inlet hole 210 and the vent hole 41 are connected through a vent channel without a heating cavity.

Different from the above-mentioned embodiment, refer to fig. 11, in the second embodiment of the utility model, electromagnetic induction spare 40 is for wrapping up the tin paper on the bowl mouth of cigarette bowl 11, has pricked a plurality of air vents on the tin paper of bowl mouth top, and electromagnetic heater 200's thermal-insulated chassis 21 directly erects on the bowl mouth of cigarette bowl 11, and the outer boss 212 of thermal-insulated chassis 21 cooperates with the bowl mouth of cigarette bowl 11 is unsmooth (the edge is contradicted on guide projection 213 and the cigarette bowl 11 is inside) to prevent that thermal-insulated chassis 21 from radially slipping out of cigarette bowl 11.

Different from the first embodiment and the second embodiment, refer to fig. 12, in the third embodiment of the present invention, the electromagnetic heater further includes a heat-resistant bowl cover 50 capable of covering on the smoke bowl 11, the heat-resistant bowl cover 50 is provided with a containing cavity 51 in a concave manner with the bowl opening matching position of the smoke bowl 11, a through air vent 511 is provided on the bottom wall of the containing cavity 51, an outer boss 212 protruding in the middle of the heat-insulating bottom plate 21 is provided with the containing cavity 51, the shell 20 is movably erected on the heat-resistant bowl cover, the outer boss 212 extends into the containing cavity 51, and an air inlet hole communicated with the outside is formed between the heat-resistant bowl cover 50 and the heat-insulating bottom plate 23, and the air inlet hole is communicated with the air vent 511.

In this embodiment, the heat-resistant bowl cover 50 is a ceramic cover, and certainly, the heat-resistant bowl cover 50 may also be made of other non-magnetic-insulating non-metallic materials, and only needs to have a good heat-resistant effect, and is preferably a material with heat-insulating properties.

In this embodiment, the heat insulation chassis 21 is movably mounted on the heat-resistant bowl cover 50, and in another embodiment, the heat insulation chassis 21 may be connected with the heat-resistant bowl cover 50 (fixed connection, snap connection or other connection methods). In another embodiment, the heat insulation chassis 21 is in a bowl cover shape directly supporting and covering the smoke bowl 11, and an air passage communicated with the outside is opened at a position corresponding to the bowl opening of the smoke bowl 11.

In this embodiment, the heat-resistant bowl cover 50 is provided with an air guide groove communicating with the vent 511 from the edge to the middle, and the other end of the air guide groove is communicated with the air inlet.

Of course, in another embodiment, the depth of the accommodating cavity 51 of the thermal bowl cover 50 is greater than the distance from the supporting legs 211 to the outer bosses 212, so that when the thermal insulation chassis 21 is erected on the thermal bowl cover 50, a thermal insulation cavity is formed between the outer bosses 211 and the accommodating cavity 51.

In this embodiment, the electromagnetic induction member 40b is a metal sheet or a metal ring freely placed in the bowl 11, and in this embodiment, the electromagnetic induction member 40b is a disposable device or a non-long-term article that can be used several times.

If the area of the electromagnetic induction member 40b is large, the electromagnetic induction member 40b may be provided with a through air hole to facilitate combustion of the aerosol 10. Of course, the electromagnetic inductor 40b may not have an air hole.

Referring to fig. 14, for the fourth embodiment of the present invention, different from the above-mentioned embodiment, in this embodiment, the electromagnetic induction component 40b is provided with a smoke containing groove 43b for containing the aerosol 10 in a concave manner, the bottom of the smoke containing groove 43b is provided with an air vent 41 communicated with the inside of the cigarette bowl 11, air enters the smoke containing groove 43b to assist the aerosol 10 to burn, and then smoke passes through the air vent 41 into the cigarette bowl 11 and enters the cigarette bottle 12 of the hookah through the air pipe 111 in the cigarette bowl 11.

The electromagnetic induction piece 40c is spaced from the ventilation pipe 111 in the smoking bowl 11. The smoke containing groove 43b also constitutes a heating portion 43b of the electromagnetic induction member 40 b.

Preferably, the heat insulation chassis 21 of the electromagnetic inductor 200 is erected on the electromagnetic induction piece 40b, and an air inlet hole (between the adjacent supporting legs 211) communicating with the outside is formed between the heat insulation chassis and the electromagnetic induction piece 40b, and the air inlet hole is communicated with the smoke containing groove 43b. The heating portion 43b is engaged with an outer boss 211 of the heat insulating base plate 21 in a concave-convex manner.

In order to prevent the smoke from overflowing, the heat insulation chassis 21 of the electromagnetic inductor 200 is erected on the electromagnetic induction piece 40b and also covers the smoke containing groove 43b.

Referring to fig. 15, for the fourth embodiment of the present invention, it is different from the first embodiment, in this embodiment, the electromagnetic induction component 40c is concave and provided with a smoke containing groove 43c for containing the smoke generating substance 10, the smoke containing groove 43c is an annular shape corresponding to the smoke containing area of the tobacco bowl 11, the bottom of the smoke containing groove 43c is provided with an air vent 41 communicated with the interior of the tobacco bowl 11, air enters the smoke containing groove 43c to assist the combustion of the smoke generating substance 10, and smoke passes through the air vent 41 into the tobacco bowl 11 and enters the tobacco bottle 12 of hookah through the air pipe 111 in the tobacco bowl 11.

The electromagnetic induction piece 40c is spaced from the ventilation pipe 111 in the smoking bowl 11. The smoke containing recess 43c also constitutes a heating portion 43c of the electromagnetic induction member 40 b.

Preferably, the heat insulation chassis 21 of the electromagnetic inductor 200 is erected on the electromagnetic induction piece 40c, and an air inlet hole (between adjacent supporting legs 211) communicated with the outside is formed between the heat insulation chassis and the electromagnetic induction piece 40c, and the air inlet hole is communicated with the smoke containing groove 43c.

In order to prevent the smoke from overflowing, the heat insulating bottom plate 21 of the electromagnetic sensor 200 is erected on the electromagnetic induction member 40c, and also covers the heating portion 43c, and at the lowest covers the smoke containing groove 43c.

In the present embodiment, the heating member 40c may be a single member, and the peripheral portion and the central portion of the heating member 40c are made of the same material as the heating portion 43c. In another embodiment, the heating member 40c may be a fitting member, the central portion and the heating portion 43c may be made of different materials, and the central portion opposite to the air pipe 111 may be made of a non-magnetic and heat-resistant material, such as a ceramic material.

Of course, different from the above embodiments, the electromagnetic inductor 200 in the first embodiment may be directly erected on the cigarette bowl, and the electromagnetic induction part 40 is freely placed in the cigarette bowl 11, so as to heat the electromagnetic induction part 40 through the electromagnetic inductor 200. The heat insulation chassis 21 of the electromagnetic inductor 200 covers the bowl 11 and forms an air inlet 211 with the bowl 11.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims (19)

1. An electromagnetic heater for heating water smoke is characterized in that: including the casing with install the electromagnetic heating main part in the casing, the casing is including thermal-insulated chassis, the electromagnetic heating main part includes excitation coil and drive circuit, excitation coil is the slice and is formed by the wire outwards spiraling gradually around a center, the excitation coil orientation thermal-insulated chassis direction, drive circuit control excitation coil to it can make electromagnetic induction spare produce the high frequency alternating current signal of eddy current effect to send outside the thermal-insulated chassis.

2. The electromagnetic heater of claim 1, wherein: the supporting legs of a plurality of support casings are arranged on the heat insulation chassis in a protruding mode, the supporting legs can be supported above the cigarette bowl and form an air inlet communicated with the interior of the cigarette bowl between the heat insulation chassis and the cigarette bowl.

3. The electromagnetic heater of claim 2, wherein: the supporting legs are distributed around the center of the heat insulation chassis, and a heating area corresponding to the position of the magnet exciting coil is formed in the surrounding middle of the supporting legs.

4. The electromagnetic heater of claim 2, wherein: the supporting legs are arranged at the position, close to the edge, of the heat insulation chassis.

5. The electromagnetic heater according to claim 2, wherein: an outer boss protrudes outwards from the middle of the heat insulation base plate, a pit recessed in the peripheral edge is formed in the shell on the back of the outer boss, and the excitation coil is installed in the pit.

6. The electromagnetic heater according to claim 5, wherein: outer boss mesa place horizontal plane is less than the supporting legs is terminal, the supporting legs set up in the thermal-insulated chassis closes on the position duplex winding on border thermal-insulated chassis center distributes, just the supporting legs support in when the bowl mouth of cigarette bowl is gone up, outer boss stretches into in the cigarette bowl.

7. The electromagnetic heater according to claim 6, wherein: the outer boss is formed with a plurality of block lugs along the outward protruding setting, the block lug with the supporting legs sets up in a staggered manner, the block lug outside with the distance between the thermal-insulated chassis center is more than or equal to the supporting legs inboard with the distance between the thermal-insulated chassis center is less than the distance of the supporting legs outside to the thermal-insulated chassis center, just the terminal slope in order to form the guide wall in the block lug outside.

8. The electromagnetic heater of claim 1, wherein: still including the heat-resisting bowl lid that can cover on the cigarette bowl, heat-resisting bowl cover the upper surface with the concave chamber that holds that is equipped with in bowl mouth complex position of cigarette bowl, set up the through-hole that runs through on holding the diapire in chamber, protruding being equipped with in the middle of the thermal-insulated chassis with hold the unsmooth complex outer boss in chamber, the casing activity erects in heat-resisting bowl is covered, outer boss stretches into hold the chamber, and make form the inlet port with outside intercommunication between heat-resisting bowl lid and the thermal-insulated drain pan, just the inlet port with the through-hole intercommunication.

9. The electromagnetic heater of claim 1, wherein: the electromagnetic heating main body further comprises a control unit and a power supply unit, the power supply unit supplies power to the driving circuit, and the control unit controls the driving circuit to act; the casing includes top shell, drain pan, and install in the separation lid between top shell and the drain pan, the top shell with form the installation between the separation lid the first cavity of control unit and power supply unit, the separation lid with form the installation between the drain pan the second cavity of excitation coil, the separation lid is kept apart first cavity and second cavity, thermal-insulated chassis forms the diapire of drain pan.

10. The electromagnetic heater according to claim 9, wherein: the middle of the isolation cover is sunken towards the second cavity to form an isolation cavity, the isolation cavity is different from the first cavity, one side of the isolation cover back to the isolation cavity forms an inner boss protruding outwards, and the magnet exciting coil is installed between the inner boss and the heat insulation base plate.

11. The electromagnetic heater according to claim 10, wherein: the excitation coil is arranged on the inner boss and has a distance with the heat insulation chassis.

12. The electromagnetic heater according to claim 10, wherein: the bottom shell comprises an annular fixing frame and a heat insulation base plate clamped on the annular fixing frame.

13. The electromagnetic heater of claim 1, wherein: one side of the excitation coil, which is far away from the heat insulation base plate, is provided with an electromagnetic shielding sheet, and the excitation coil is installed on the electromagnetic shielding sheet.

14. The electromagnetic heater according to claim 13, wherein: the electromagnetic shielding sheet is provided with a radius hole which is communicated from the edge to the center, and the excitation coil is gradually and inwards coiled from the edge to the center along the first end of the excitation coil and then led out of the second end of the excitation coil along the radius hole.

15. The electromagnetic heater of claim 1, wherein: the length of the cross section of the conducting wire of the excitation coil in the radial direction is larger than the length of the cross section of the conducting wire of the excitation coil in the direction of the central line of the excitation coil.

16. The electromagnetic heater of claim 1, wherein: the heat insulation chassis is a ceramic disc or an mica part.

17. The utility model provides a shredded tobacco for water pipes electromagnetic heating device which characterized in that: the electric heating cigarette bowl comprises an electromagnetic heater and an electromagnetic induction part, wherein the electromagnetic induction part is arranged at a cigarette bowl, the electromagnetic heater is as defined in any one of claims 1 to 16 and is arranged above the cigarette bowl, the heat insulation base plate is opposite to a bowl opening of the cigarette bowl, and an excitation coil of the electromagnetic heater sends out a high-frequency alternating current signal to enable the electromagnetic induction part to generate an eddy current effect.

18. The hookah electromagnetic heating device of claim 17, wherein: the electromagnetic induction spare for wrap up in tinfoil on the bowl mouth of cigarette bowl or install in sheetmetal on the bowl mouth of cigarette bowl or hold the electromagnetic induction piece in the bowl of cigarette bowl, a plurality of air vents have on tinfoil or the sheetmetal, the electromagnetic induction spare is right aerosol production thing heating in the bowl of cigarette is in order to produce smog.

19. The hookah electromagnetic heating apparatus of claim 17, wherein: electromagnetic induction spare is installed on the mouth of a cigarette bowl and is formed with flourishing cigarette recess on it, flourishing cigarette recess is used for holding aerosol, electromagnetic induction spare is right aerosol heating in the flourishing cigarette recess, flourishing cigarette recess bottom be equipped with the air vent of cigarette bowl in-connection, air admission flourishing cigarette recess is supplementary to burn after producing smog, the smog of production passes in the air vent gets into the cigarette bowl to in the tobacco flask of breather pipe entering hookah through in the cigarette bowl.

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