Device for Heating Tobacco

Abstract

In a device for heating tobacco in a cigarette, a heating tube heats the cigarette to generate smoke. The heating tube has a first channel and a set of one or more second channels. Each second channel is disposed at an outer circumference of the first channel and is in connection with the first channel. The first channel receives the cigarette and conducts mainstream smoke, which is a portion of the smoke passing through the tobacco and a cigarette filter in the cigarette. The second channel set collects and conducts side-stream smoke, which is a portion of the smoke passing through a cigarette paper of the cigarette. The mouthpiece is connected to both the first channel and the second channel set to provide not only the mainstream smoke but also the side-stream smoke for a smoker to inhale, thereby avoiding wasting the side-stream smoke.

What is claimed is: 
     
         1 . A device for heating tobacco in a cigarette to enable a smoker to smoke the cigarette, the device comprising:
 a heating tube for heating the cigarette to thereby generate smoke, the heating tube comprising a first channel and a set of one or more second channels, each second channel in the second channel set being disposed at an outer circumference of the first channel and being in connection with the first channel; and   a mouthpiece configured for the smoker to inhale the smoke;   wherein the first channel is used for receiving the cigarette and conducting mainstream smoke of the cigarette, where the mainstream smoke is a portion of the smoke passing through the tobacco and a cigarette filter in the cigarette;   wherein the second channel set is used for collecting and conducting side-stream smoke of the cigarette where the side-stream smoke is a portion of the smoke passing through a cigarette paper of the cigarette; and   wherein the mouthpiece is connected to both the first channel and the second channel set to provide not only the mainstream smoke but also the side-stream smoke for the smoker to inhale, thereby avoiding wasting the side-stream smoke.   
     
     
         2 . The device according to  claim 1 , wherein the second channel set consists of plural second channels, the second channels being disposed circumferentially along the first channel. 
     
     
         3 . The device according to  claim 1 , wherein each second channel in the second channel set has a cross-sectional area greater than 0.1 mm 2  for allowing smoke generated inside the cigarette to pass through the cigarette paper into the second channel set so that the cigarette paper is used as a screen paper to block some of harmful substances in the smoke. 
     
     
         4 . The device according to  claim 1 , wherein the heating tube is disposed with a smoke storage chamber. 
     
     
         5 . The device according to  claim 1  further comprising a housing and an intake pipe, wherein the housing is internally disposed with the intake pipe for air cross-ventilation, an outlet end of the intake pipe being located at an end of the heating tube away from the mouthpiece. 
     
     
         6 . The device according to  claim 1  further comprising an adapter and an intake pipe, wherein an end of the heating tube away from the mouthpiece is disposed with the adapter, the adapter comprising a first mounting portion and a second mounting portion, the first mounting portion being connected to an intake pipe, the second mounting portion being connected to the heating tube, the adapter being disposed with a first through-hole for connecting the intake pipe and the heating tube. 
     
     
         7 . The device according to  claim 1  further comprising a transition piece, wherein the transition piece is arranged between the heating tube and the mouthpiece, the transition piece being disposed with a first transition channel and a second transition channel, the first transition channel being connected with the first channel, the second transition channel being connected with the second channel set. 
     
     
         8 . A device for heating tobacco in a cigarette to enable a smoker to smoke the cigarette, the device comprising:
 a heating tube for heating the cigarette to thereby generate smoke, the heating tube comprising a first channel and a set of one or more second channels, each second channel in the second channel set being disposed at an outer circumference of the first channel and being in connection with the first channel;   a mouthpiece configured for the smoker to inhale the smoke;   a cigarette support portion; and   a height-limit article disposed inside the mouthpiece toward one end of the first channel, the first channel away from one end of the mouthpiece being provided with the support portion for supporting the cigarette, a distance between one end of the support portion near the mouthpiece and the height-limit article being less than the length of the cigarette, whereby the cigarette is compressed by the height-limit article and the cigarette support portion so as to generate wrinkle at a side surface of a cigarette paper to thereby increase some space for enhancing the flowability of side-stream smoke, the side-stream smoke being a portion of the smoke passing through a cigarette paper of the cigarette.   
     
     
         9 . The device according to  claim 8  further comprising a support portion for supporting the cigarette, wherein at one end of the first channel away from the mouthpiece, the support portion is disposed, wherein the support portion includes a push rod assembly, wherein a push rod of the push rod assembly abuts one end of the cigarette, and wherein a distance between the push rod that faces one end of the mouthpiece and the height-limit article is less than or equal to the length of the cigarette, whereby the cigarette is compressed by the height-limit article and the push rod assembly, so as to generate wrinkle at the side surface of the cigarette paper hence to increase some space for enhancing flowability of the side-stream smoke. 
     
     
         10 . The device according to  claim 8  further comprising a housing, wherein the mouthpiece is connected to the housing, and the mouthpiece is connected with the first channel and the second channel set so that the mainstream and side-stream of the smoke meet together in the mouthpiece for further smoking. 
     
     
         11 . The device according to  claim 9 , wherein the push rod assembly comprises a connecting base, and the inner wall of the connecting base is sealingly connected to a sidewall of the push rod, wherein the push rod extends into the interior surface of the heating tube toward the direction of the mouthpiece. 
     
     
         12 . The device according to  claim 8  further comprising a housing, wherein an outer periphery of the mouthpiece is provided with at least two first protrusions, the housing being provided with a mouthpiece holder for connecting with the mouthpiece, an inner wall of the mouthpiece holder being spaced apart with at least two second protrusions, the first protrusions being locked with the second protrusions so as to fix the mouthpiece with the device. 
     
     
         13 . The device of  claim 1  further comprising:
 a temperature control system for controlling a heating temperature of the heating tube; 
 a thermistor disposed at an outer surface of the heating tube to monitor the heating temperature; and 
 a battery power source for powering the heating tube, wherein a pulse width modulation (PWM) method is employed in the temperature control system for controlling an output power of the battery power source so as to adjust the heating temperature. 
 
     
     
         14 . The device according to  claim 13 , wherein a lower temperature limit and an upper temperature limit are set in the temperature control system. 
     
     
         15 . The device according to  claim 14 , wherein the thermistor is capable of detecting whether the heating temperature of the heating tube is lower than the lower temperature limit and whether the heating temperature is higher than the upper temperature limit so as to maintain the heating temperature in a preset heating temperature range.