Patent Publication Number: US-2019191767-A1

Title: Electromagnetic heating device and smoking set having same

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of smoking sets, and particularly to an electromagnetic heating device and a smoking set having same. 
     BACKGROUND ART 
     Currently, with the increasing number of the smokers, tobacco cigarettes are widely applied to our daily life, it is difficult to avoid passive smoking. The traditional tobacco cigarettes need open fire to be lit to produce smoking smog, as used herein, the tobacco cigarette emits substantive amount of toxic materials to human beings. A majority of smokers know the detriment of smoking but can&#39;t self-control, so quitting smoking has been always up in the air. 
     In the recent years, a kind of low-temperature baked smoking set is appeared, with low-temperature baking to produce the smoking smog, greatly reducing generation of toxic materials. The low-temperature baked smoking set in the market generally includes a heating device, into which the tobacco cigarette is inserted; by relying on the heater heating the tobacco cigarette, the smoking set generates smoking smog. 
     Thus, the related smoking sets to the inventors have following disadvantages: the heating device in the related smoking set may evenly heat a disposable tobacco cigarette such that smelling and flavors in latter stage get diminished, therefore, during smoking one tobacco cigarette, the smelling and flavors are inconsistent in former and latter stages to influence the user experience of smoking. 
     SUMMARY 
     In view of the drawbacks in the prior art, the present disclosure relates to an electromagnetic heating device and a smoking set having the same, with simple structures and available for sectional heating such that smelling and flavors will be consistent during tobacco cigarettes are drawn. 
     In order to solve the above technical problem, the present disclosure provides a heating device according to independent claim  1  whereas various embodiments of the heating device and improvements thereto are recited in the dependent claims. The heating device includes a heating compartment; an electromagnetic inductive coil wound around a periphery of the heating compartment; the electromagnetic inductive coil at least comprises a first inductive coil and a second inductive coil; the first inductive coil and the second inductive coil are wound around two parts of the periphery of the heating compartment, the first inductive coil and the second inductive coil extending in an axial direction of the heating compartment; turns of the first inductive coil is more than turns of the second inductive coil such that heating speeds of two parts of the periphery of the heating compartment are different. 
     As used herein, the electromagnetic inductive coil further includes a connective coil, respectively connected with the first inductive coil and the second inductive coil. 
     As used herein, the first inductive coil and the second inductive coil are made by one same electricity conductive wire. 
     As used herein, the heating device further includes a paramagnet, disposed outside the heating compartment and the electromagnetic inductive coil, extending along an axial direction of the spiral electromagnetic inductive coil; the paramagnet is configured for changing a direction of magnetic field lines of the electromagnetic inductive coil. 
     As used herein, the heating compartment further includes a metallic heating tube and a wire-wound supporter; the heating tube is configured for receiving aerosol-formed materials; the wire-wound supporter is sleeved outside the heating tube, the electromagnetic inductive coil is wound around the supporter; the paramagnet is disposed outside the supporter. 
     As used herein, the heating compartment includes a wire-wound supporter, a metallic heating tube and a base, the heating tube is configured for receiving aerosol-formed materials; the supporter is sleeved outside the heating tube and the base, the electromagnetic inductive coil is wound around the supporter; the paramagnet is disposed outside the supporter. 
     As used herein, the supporter includes a slot, the slot includes a first slot and a second slot, part of the first inductive coil is inserted into the first slot and part of the second inductive coil is inserted into the second slot. 
     As used herein, the paramagnet includes a pressing part, a first fixing part and a second fixing part; the first fixing part and the second fixing part are respectively disposed at two ends of the pressing part; the first fixing part is fixed with one end of the heating compartment, the second fixing part is fixed with the other end of the heating compartment; the pressing part and the heating compartment clamp the electromagnetic inductive coil therebetween. 
     As used herein, a number of the paramagnets is multiple, multiple paramagnets are evenly distributed around the heating compartment. 
     As used herein, the paramagnet is hollow and a tubular element with an open end, the paramagnet is sleeved on the heating compartment, the paramagnet and the heating compartment clamp the electromagnetic inductive coil therebetween. 
     As used herein, the paramagnet is made of at least one or more selected from a group of manganese ferrite, zinc ferrite, nickel-zinc ferrite and manganese-magnesium-zinc ferrite. 
     To solve the above problem, the present disclosure further provides a low-temperature baked smoking set having the heating device as described supra. 
     As used herein, the smoking set further includes a power supply module, the power supply module is coupled with the electromagnetic inductive coil in the heating device, the power supply module is configured for supplying an alternating current to the electromagnetic inductive coil. 
     Additional aspects and advantages of the present disclosure will be: the present disclosure relates to a heating device and a smoking set having same; as used herein, the heating device includes a heating compartment; an electromagnetic inductive coil wound around a periphery of the heating compartment; the electromagnetic inductive coil at least comprises a first inductive coil and a second inductive coil; the first inductive coil and the second inductive coil are wound around two parts of the periphery of the heating compartment, extending in an axial direction of the heating compartment; turns of the first inductive coil is more than turns of the second inductive coil such that heating speeds of two parts of the periphery of the heating compartment are different. The structure of the heating device and the smoking set as described supra are capable of sectional heating with a simple structure, which may make the smelling and flavoring consistent. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the present disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a cross-sectional view of a low-temperature baked smoking set in accordance with one embodiment of the present disclosure; 
         FIG. 2  is a partial cross-sectional view of the low-temperature based smoking set in  FIG. 1 . 
         FIG. 3  is an isometric view of a wire-wound supporter in the heating device in  FIG. 2 . 
         FIG. 4  is an isometric view of the heating tube in accordance with another embodiment of the present disclosure; 
         FIG. 5  is a cross-sectional of the heating compartment in accordance with another embodiment of the present disclosure; 
         FIG. 6  is an isometric view of a heating plug-in component in  FIG. 5 ; 
         FIG. 7  is an isometric view of a paramagnet in accordance with another embodiment of the present disclosure; 
         FIG. 8 a    illustrates a magnetic field produced by the electromagnetic inductive coil without the paramagnet in accordance with the present disclosure; 
         FIG. 8 b    illustrates a magnetic field produced by the electromagnetic inductive coil with the paramagnet in accordance with the present disclosure; 
         FIG. 9  is an isometric view of a heating device in accordance with another embodiment of the present disclosure; 
         FIG. 10  is a block diagram of the power supply module in accordance with the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The structure and operating principle of the above heating element with temperature control and the low-temperature baked smoking set having same are illustrated below, mainly shown from  FIG. 1  to  FIG. 10  in further detail using exemplary embodiments. 
     Referring to  FIG. 1 , it is a cross-sectional view of a low-temperature baked smoking set in accordance with one embodiment of the present disclosure. The smoking set  200  includes a heating device  100  and a shell  210 ; the heating device  100  is disposed inside the shell  210 . 
     More specifically, with reference to  FIG. 2 , the above heating device  100  includes an electromagnetic inductive coil  110 , a heating compartment  120  and a paramagnet  130 ; as used herein, the electromagnetic inductive coil  110  wound around a periphery of the heating compartment  120 . And the paramagnet  130  is disposed outside the heating compartment  120  and the electromagnetic inductive coil  110 , the paramagnet  130  extending along a axial direction of the spiral electromagnetic inductive coil  110 . 
     The above electromagnetic inductive coil  110  may be made of electricity-conductive materials, with a relatively good electricity-conductivity and cheap price such as copper wires and aluminum wires etc. The electromagnetic inductive coil  110  is wound around outside the heating compartment  120  along a certain direction, configured for heating the heating compartment  120 . According to law of electromagnetic induction, when the electromagnetic induction coil  110  is supplied with alternating current, inside of the electromagnetic induction coil  110  generates an alternating magnetic flux. The alternating magnetic flux generates an induced electromotive force in the heating compartment  120 , and when the magnetic field lines in the electromagnetic field are passing through the heating compartment  120 , the magnetic field lines are cut by the heating compartment  120 , the heating compartment  120  generates an inductive current, that is, the vertex current to heat the heating compartment  120 . 
     As used herein, as shown in  FIG. 2 , the electromagnetic inductive coil  110  includes a first inductive coil  111 , a second inductive coil  112  and a connecting coil  113 ; the first inductive coil  111  and the second inductive coil  112  are wound around two parts of a periphery of the heating compartment  120 , the first inductive coil  111  and the second inductive coil  112  extending along an axial direction of the heating compartment  120 . Preferably, the first inductive coil  111  is disposed at an end of the heating compartment  120 ; the second inductive coil  112  is disposed at the other end of the heating compartment  120 ; turns of the first inductive coil  111  is more than turns of the second inductive coil  112  such that heating speeds at two ends of the heating compartment  120  are different. The connecting coil  113  respectively is connected with the first inductive coil  111  and the second inductive coil  112 , and the connecting coil  113  is wound around middle of the heating compartment  120 . In the embodiment, under same circumstances, when turns of the electromagnetic inductive coil is more, the electromagnetic field lines would be more cut by the heating compartment  120  such that the inductive electricity is larger, at last the heating speed is faster. Optionally, when putting the tobacco cigarette into the heating compartment  120 , assuming the tobacco cigarette includes a first end, a middle part and a second end, as used herein, the first end is near to the mouthpiece, the second end is always from the mouthpiece, the middle part is between the first end and the second end. The first inductive coil  111  is sleeved on the first end, and the second inductive coil  112  is sleeved on the second end, so that the first end has a faster heating speed than the second end, while the middle part is heated by thermal conductivity from the first end and the second end. The heating speed is changed successively along the first end, the middle part to the second end, from fast to slow. When the first end of the tobacco cigarette is finished to heat, the middle part and the second end still continue heating, then the middle part thereof is finished to heat but the second end still continues heating, which may make the smelling and flavors consistent all the time, without diminished during smoking, therefore improving the user experience. 
     Understandable, in some embodiments, the connecting coil  113  may be omitted; the first inductive coil  111  and the second inductive coil  112  can be made of one same electricity conductive wire. 
     Understandable, in some embodiments, outside the electromagnetic inductive coil  110  may be coated with an insulating layer (not shown), the insulating layer is configured to avoid electricity leakage through the electromagnetic inductive layer  110 . The insulating layer is made of insulating materials, such as synthetic resins, epoxy resins, phenolic resins,  4250  plastic, polyimide plastic and energy-concentrated plastic etc. 
     The above heating compartment  120  includes a wire-wound supporter  121  and a heating tube  122 . The wire-wound supporter  121  is sleeved on the heating tube  122 , the electromagnetic inductive coil  110  is wound around the wire-wound supporter  121 , the paramagnet  130  is disposed on the wire-wound supporter  121 , the paramagnet  130  is configured to change the magnetic field lines of the electromagnetic inductive coil  110 . 
     As used herein, with reference to  FIG. 3 , the wire-wound supporter  121  is made of non-metallic materials or other materials failing to generate electromagnetic induction. The wire-wound supporter  121  has a slot  1210 ; the slot  1210  includes a first slot  12101  and a second slot  12102 . Part of the first induction coil  111  inserts into the first slot  12101 , part of the second induction coil  112  inserts into the second slot  12102 , wound around the electromagnetic induction coil  110 . Two ends of the wire-wound supporter  121  respectively have a first retaining part  1211  and a second retaining part  1212 , as used herein, the first retaining part  1211  and the second retaining part  1212  are shaped as a circular ring, the first retaining part  1211  and the second retaining part  1212  are all wound around the supporter  121  such that the electromagnetic inductive coil  110  is more stably wound around the supporter  121 . 
     Understandable, in some embodiments, the slot  1210  may be omitted; the electromagnetic inductive coil  110  may be wound around the supporter  121  in other ways, such as coating high temperature resistant glue etc. 
     The above heating tube  122  is a hollow cylinder, made of metallic conductor, preferably permeability magnetic materials, with consequently better effect of induction heating, such as powdered iron core, Fe—Ni  50  alloys, Fe—Si—Al compositions and Fe—Ni—Mo compositions etc. The heating tube  122  has a glossy surface, leading to a better effect of electromagnetic induction heating. The heating tube  122  has a receiving chamber (not shown) therein, the receiving chamber is configured for receiving the aerosol-formed materials, as used herein, the aerosol-formed materials may be at least one or more tobacco bar or flake selected from a group of tobacco shreds, tobacco sheets and tobacco powders etc. 
     Understandable, in some embodiments, as shown in  FIG. 4 , the heating tube  122  may include a first heating tube  1221  and a second heating tube  1222 , the first heating tube  1221  is connected with the second heating tube  1222 , the receiving chamber is communicated with the first heating tube  1221  and the second heating tube  1222 , meanwhile, a central axis of the first heating tube  1221  is aligned with the central axis of the second heating tube  1222 . An inner diameter of the first heating tube  1221  is equal to that of the second heating tube  1222 . An outer diameter of the first heating tube  1221  is less than that of the second heating tube  1222  so that a mass of the first heating tube  1221  is greater than that of the first heating tube  1221 . The area of winding the first inductive coil  111  is corresponding to the first heating tube  1221  while the area of the winding the second inductive coil  112  is corresponding to the second heating tube  1222 , under the same circumstance, for rising to a same temperature, the greater the mass of a body, the greater is time needed, therefore, the heating speed of the first heating tube  1221  is greater than that of the second heating tube  1222 . 
     Understandable, in some embodiments, as shown in  FIG. 5  and  FIG. 6 , the heating tube  122  may be omitted, the above heating compartment  120  includes a wire-wound supporter  121 , a heating plug-in component  123  and a base  124 . The heating plug-in component  123  is configured for being inserted into the aerosol-formed materials; the heating plug-in component  123  is disposed on the base  124 . The wire-wound supporter  121  is sleeved on the heating plug-in component  123  and the base  124 . The electromagnetic inductive coil  110  is wound around the supporter  121 . The paramagnet  130  is disposed on the supporter  121 . In this case, the supporter  121  is the same as described supra. The heating plug-in component  123  roughly is shaped as plate-shaped component, made of metallic materials, like pure metals, alloys, metallic compounds and special metallic materials etc. such as Fe, Cu, Al, Sn, Ni, Au, Ag, Pb, Zn and their alloys etc. The heating plug-in component  123  has fins  1231 . The shape of the fin  1231  may be designed as a prism in favor of the heating plug-in component  123  to be inserted into the solid aerosol-formed materials, and enlarging the contact area for heating. The base  124  is fixed with the supporter  121  to support the heating plug-in component  123  to make the heating plug-in component  123  available for vertical setting. By replying on the heating plug-in component  123  and the base  124 , they make the heating device  100  available for central heating, to satisfy multiple kinds of heating methods. 
     The above paramagnet  130  is made of at least one or more selected from a group of manganese ferrite, zinc ferrite, nickel-zinc ferrite and manganese-magnesium-zinc ferrite. The paramagnet  130  is barrel-shaped dowel joint element with an end opened. The paramagnet  130  is sleeved on the heating compartment  120 . The paramagnet  130  and the heating compartment  120  clamp the electromagnetic inductive coil  110  therebetween. 
     Understandable, in some embodiments, as shown in  FIG. 7 , the above paramagnet  130  includes a pressing part  131 , a first fixing part  132  and a second fixing part  133 ; the first fixing part  132  and the second fixing part  133  are respectively disposed at two ends of the pressing part  131 ; the first fixing part  132  is fixed with one end of the heating compartment  120 , the second fixing part  133  is fixed with the other end of the heating compartment  120 ; the pressing part  131  and the heating compartment  120  clamp the electromagnetic inductive coil  110  therebetween. As used herein, the first fixing part  132  may be fixed with the first retaining part  1211  of the supporter  121 , the second fixing part  133  may be fixed with the second retaining part  1212  of the supporter  121 . The paramagnets  130  may have at least one paramagnet  130  that are evenly disposed around the heating compartment  120 &#39;s periphery. Optionally, the number of the paramagnets  130  may be four and four paramagnets are evenly disposed around the heating compartment  120 &#39;s periphery. By contrary, the setting as described supra may improve the efficiency of electromagnetic inductive heating as well as decreasing the materials 
     In the embodiment, as shown in  FIG. 8 a   , without the paramagnet  130 , the electromagnetic inductive coil  110  is supplied with alternative current to produce the magnetic field, part of the magnetic field lines in the magnetic field are passing through the heating compartment  120 , while cut by the heating compartment  120 , thus an inductive current in the heating compartment  120  is generated so as to heat the heating compartment  120 . The other part of the magnetic field lines in the magnetic field fails to be cut by the heating compartment  120 , so that the magnetic field produced by the electromagnetic inductive coil  110  won&#39;t entirely be used to generate the inductive current, wasting a lot of time. As shown in  FIG. 8 b   , when the paramagnet  130  is sleeved outside the heating compartment  120 , the electromagnetic inductive coil is supplied with the alternative current, to generate the magnetic field. Part of the magnetic field lines in the magnetic field is passing through the heating compartment  120 , the other part of the magnetic field lines in the magnetic field is not supposed to pass through the heating compartment  120  but since affected by the paramagnet  130 , the direction of the magnetic field lines is changed, the other part of the magnetic field lines passes through the heating compartment  120 . Therefore, the inductive current generated by the heating compartment  120  gets larger, with consequently improving the efficiency of electromagnetic inductive heating. 
     The heating device  100  in accordance with the embodiment includes the electromagnetic inductive coil  110  and the heating compartment  120 . By arranging different turns of the electromagnetic inductive coils  111  at two ends of the heating compartment  120 , the heating speeds of two ends of the heating compartment  120  are different, so that the heating device  100  in the embodiment has simple structure and is available for sectional heating, so the smelling during smoking keep consistent. Moreover, the paramagnet  130  is sleeved on the heating compartment  120  so that the direction of electromagnetic field lines of the electromagnetic inductive coil  110  is changed, thus improving efficiency of heating by electromagnetic induction. 
     Understandable, in some embodiments, as shown in  FIG. 9 , the paramagnet  130  may be omitted. The heating device  100  includes the electromagnetic inductive coil  110  and the heating compartment  120 . As used herein, the electromagnetic inductive coil  110  and the heating compartment  120  are the same as described supra. However, the electromagnetic inductive coils  110  at two ends of the heating compartment  120  are set to owe different turns, in this way, the heating speeds at two ends of the heating compartment  120  are different to make the heating device  100  available of sectional heating, therefore the smelling and flavors during smoking keep consistent. 
     The above shell  210  may be a plastic shell, preferably some plastic shells with good thermal insulation and heat preservation, such as polycarbonate, polyurethane and polyimide etc. The shell  210  is configured for receiving the heating device  100 . 
     In some embodiments, the shell  210  is made by a metallic shell, covering with a plastic membrane to contribute to heat insulation and thermal preservation. 
     As used herein, the above smoking set  200  further includes a power supply module  220 ; the power supply module  220  is coupled with the electromagnetic inductive coil  110  to supply an alternative current for the electromagnetic inductive coil  110 , so the electromagnetic inductive coil  110  is capable of heating. Optionally, as shown in  FIG. 10 , the power supply module  220  includes an USB interface  221 , a power supply set  222 , a switch  223 , a charging circuit  224  and a discharging circuit  225 . The power supply set  222  is coupled with the input end through the switch  223 ; the output end of the discharging circuit  225  is coupled with the electromagnetic inductive coil  110 , the power supply set  222  is coupled with the USB interface  221  through the charging circuit  224 . More specifically, the power supply set  222  may be a charging power supply set  222 . The switching  223  is disposed on a surface of the shell  210 . The product will be interpreted hereinafter in four cases, the first case: when the user turns off the switch  223 , the power supply set  222  is coupled with the input end of the discharging circuit  225 , the discharging circuit  225  will be in the discharging work state to supply power to the electromagnetic inductive coil  110  via the output end itself, so that the electromagnetic inductive coil  110  generates an excitation field; the excitation field causes the heating tube  122  in the heating compartment  120  or the heating plug-in component  123  to generate heating itself, so as to heat the aerosol-formed materials, as a result, the user may smoke the smoking set  100  after turning off the switch  223 . The second case; when the user turns off the switch  223 , the power supply set  222  is unconnected with the input end of the discharging circuit  225 . When the discharging circuit  225  is not in working state, the user fails to smoke the smoking smog generated by the smoking set  100 . The third case: when the USB interface  221  is supplied with the external power supply, the charging circuit  224  detects the existing of the external power supply and comes into the electricity charging state, so as to charge the chargeable power supply. The fourth case: when the USB interface  221  isn&#39;t connected with the external power supply, the charging circuit  224  doesn&#39;t detect the existing of external power supply, consequently the charging circuit  224  is in non-working state. Optionally, the power supply set  22  includes a chargeable lithium battery. 
     The smoking set  100  in accordance with the present disclosure, includes a heating device  100  for improving the heating efficiency of the electromagnetic induction, effectively improving the user experience, and effectively improving the heating efficiency, as well as improving utilization rate of energy, with a simple structure and low price. 
     Terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Variations may be made to the embodiments and methods without departing from the spirit of the disclosure. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the scope of the disclosure.