Patent Publication Number: US-2023157367-A1

Title: Vaporizer and electronic vaporization device

Description:
CROSS-REFERENCE TO PRIOR APPLICATION 
     Priority is claimed to Chinese Patent Application No. 202122856219.X, filed on Nov. 19, 2021, the entire disclosure of which is hereby incorporated by reference herein. 
     FIELD 
     The present disclosure relates to the field of vaporization, and more specifically, to a vaporizer and an electronic vaporization device. 
     BACKGROUND 
     An existing vaporizer of an electronic vaporization device includes a liquid storage housing, a liquid storage member disposed in the liquid storage housing for absorbing and storing a vaporization liquid, a vent tube passing through the liquid storage member, and an end cap covering an opening at an upper end of the liquid storage housing. Usually, the end cap and the vent tube are sealed with an interference fit, so that a closed cavity is formed inside the vaporizer. When the vaporizer is in a high-temperature state, air in the cavity inside the vaporizer and air in the liquid storage member expand by heating to squeeze the vaporization liquid, which may cause the vaporization liquid stored in the liquid storage member to be squeezed out of a vapor convey channel of the vaporizer, resulting in liquid leakage. 
     SUMMARY 
     In an embodiment, the present invention provides a vaporizer, comprising: a liquid storage housing; a liquid storage member disposed in the liquid storage housing; a vent tube passing through the liquid storage member; an end cap covering an end of the liquid storage housing; and an air-pressure balance channel communicating the liquid storage member with the outside. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following: 
         FIG.  1    is a three-dimensional schematic structural diagram of an electronic vaporization device according to a first embodiment of the present disclosure; 
         FIG.  2    is a schematic exploded structural view of the electronic vaporization device shown in  FIG.  1   ; 
         FIG.  3    is a schematic longitudinal cross-sectional structural view of the electronic vaporization device shown in  FIG.  1   ; 
         FIG.  4    is a schematic exploded structural view of a vaporizer shown in  FIG.  2   ; 
         FIG.  5    is a schematic transverse cross-sectional structural view of the vaporizer shown in  FIG.  2   ; 
         FIG.  6    is a schematic exploded structural view of a heating assembly shown in  FIG.  4   ; 
         FIG.  7    is a schematic top structural view of an end cap shown in  FIG.  4   ; 
         FIG.  8    is a schematic longitudinal cross-sectional structural view of a vaporizer according to a second embodiment of the present disclosure; 
         FIG.  9    is a schematic partial structural view of the vaporizer shown in  FIG.  8   ; 
         FIG.  10    is a schematic partial cross-sectional structural view of a vaporizer according to a third embodiment of the present disclosure; 
         FIG.  11    is a schematic partial cross-sectional structural view of a vaporizer according to a fourth embodiment of the present disclosure; and 
         FIG.  12    is a schematic partial cross-sectional structural view of a vaporizer according to a fifth embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In an embodiment, the present invention provides an improved vaporizer and an electronic vaporization device with the vaporizer for the defects in the related art. 
     In an embodiment, the present invention provides a vaporizer, including a liquid storage housing, a liquid storage member disposed in the liquid storage housing, a vent tube passing through the liquid storage member, and an end cap covering an end of the liquid storage housing; and further including an air-pressure balance channel communicating the liquid storage member with the outside. 
     In some embodiments, an airflow channel is formed in the vent tube, and a vent hole in communication with the airflow channel is formed on the end cap; and the air-pressure balance channel is in communication with the airflow channel and the vent hole to be in communication with the outside. 
     In some embodiments, the end cap and the vent tube are fitted with a gap to form the air-pressure balance channel. 
     In some embodiments, a fitting gap between the end cap and the vent tube is 0-0.1 mm. 
     In some embodiments, the air-pressure balance channel is formed between an inner wall surface and/or an upper end surface and/or an outer wall surface of the vent tube and the end cap. 
     In some embodiments, the liquid storage member is a liquid storage cotton. 
     In some embodiments, a cavity is formed between a lower end surface of the end cap and an upper end surface of the liquid storage member, and the air-pressure balance channel is in communication with the cavity. 
     In some embodiments, the end cap includes an end cap body, and the end cap body is embedded in an end of the liquid storage housing. 
     In some embodiments, the vent hole runs through the end cap body in a longitudinal direction, an upper end of the vent tube extends into the vent hole, and the air-pressure balance channel is defined between an outer wall surface of the vent tube and a hole wall of the vent hole. 
     In some embodiments, a bottom surface of the end cap body is recessed upward to form a groove, and an upper end of the vent tube extends into the groove; and 
     the air-pressure balance channel includes a first channel formed between an inner wall surface of the groove and the outer wall surface of the vent tube and a second channel formed between a groove bottom surface of the groove and the upper end surface of the vent tube. 
     In some embodiments, the end cap further includes a nesting portion extending downward from the groove bottom surface of the groove into the vent tube. 
     In some embodiments, the air-pressure balance channel further includes a third channel formed between the inner wall surface of the vent tube and an outer wall surface of the nesting portion. 
     In some embodiments, a length of the nesting portion extending into the airflow channel is less than or equal to 6.5 mm. 
     In some embodiments, the vaporizer further includes a liquid absorbing member disposed on the end cap, where an air outlet hole in communication with the vent hole is formed on the liquid absorbing member. 
     In some embodiments, the end cap has a support surface in contact with the liquid absorbing member, at least one first liquid guide groove is provided on the support surface, and the first liquid guide groove has a first end in communication with the vent hole and a second end away from the vent hole. 
     In some embodiments, two or more first liquid guide grooves are provided on the support surface; and the first liquid guide groove is a linear groove and extends along a radial direction of the support surface. 
     In some embodiments, at least one second liquid guide groove in communication with the at least one first liquid guide groove is further provided on the support surface. 
     In some embodiments, at least two second liquid guide grooves are provided on the support surface; and the second liquid guide groove is annular. 
     In some embodiments, the vaporizer further includes a heating assembly, where the liquid storage member is wrapped around a periphery of the heating assembly, and a vaporization cavity in communication with a lower end of the airflow channel is formed on the heating assembly. 
     The present disclosure further provides an electronic vaporization device, including the vaporizer according to any one of the foregoing. 
     The implementation of the present disclosure has at least the following beneficial effects. When the ambient temperature rises, the expanded air by heating inside the vaporizer may be discharged outside the vaporizer through the air-pressure balance channel, which avoids excessive squeezing of the vaporization liquid, thereby resolving the problem of liquid leakage in a high-temperature state. 
     In order to have a clearer understanding of the technical features, the objectives, and the effects of the present disclosure, specific implementations of the present disclosure are now illustrated in detail with reference to the accompanying drawings. Numerous specific details are set forth in the following description to provide a thorough understanding of the present disclosure. However, the present disclosure can be implemented in many other ways than described herein. A person skilled in the art may make similar improvements without departing from the intension of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments disclosed below. 
     In the description of the present disclosure, it needs to be understood that, orientation or position relationships indicated by terms such as “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “axial”, “radial”, and “circumferential” are orientation or position relationship shown based on the accompanying drawings or orientation or position relationship that the product of the present disclosure is usually placed in when it is used, and are merely used for describing the present disclosure and simplifying the description, rather than indicating or implying that the mentioned apparatus or element should have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be construed as a limitation to the present disclosure. 
     In addition, the terms “first” and “second” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the quantity of technical features indicated. Therefore, features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present disclosure, unless specifically defined otherwise, “a plurality of” means at least two, for example, two, three, and the like. 
     In the present disclosure, unless otherwise explicitly specified and defined, terms such as “mounted”, “connected”, “connection”, and “fixed” should be understood in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; or the connection may be a mechanical connection or an electrical connection; or the connection may be a direct connection, an indirect connection through an intermediate medium, or internal communication between two elements or mutual action relationship between two elements, unless otherwise explicitly specified. A person of ordinary skill in the art may understand the specific meanings of the foregoing terms in the present disclosure according to specific situations. 
     In the present disclosure, unless otherwise explicitly specified or defined, the first feature being located “above” or “below” the second feature may be the first feature being in a direct contact with the second feature, or the first feature being in an indirect contact with the second feature through an intermediate medium. In addition, that the first feature is “above”, “over”, or “on” the second feature may indicate that the first feature is directly above or obliquely above the second feature, or may merely indicate that the horizontal position of the first feature is higher than that of the second feature. That the first feature is “below”, “under”, and “beneath” the second feature may indicate that the first feature is directly below or obliquely below the second feature, or may merely indicate that the horizontal position of the first feature is lower than that of the second feature. 
       FIG.  1    to  FIG.  3    show an electronic vaporization device  1  according to a first embodiment of the present disclosure. In some embodiments, the electronic vaporization device  1  may be substantially cylindrical, and may include a power supply device  200  and a vaporizer  100  disposed above the power supply device  200  along a longitudinal direction. The vaporizer  100  is configured to accommodate a vaporization liquid and heat and vaporize the vaporization liquid to produce aerosols. The power supply device  200  is configured to supply power to the vaporizer  100 . It may be understood that, in other embodiments, the electronic vaporization device  1  is not limited to a cylindrical shape, and may be in other shapes such as elliptical column, square column, or flat column. 
     The power supply device  200  may include a shell  80  and a battery  90  accommodated in the shell  80 . The battery  90  is electrically connected to a heating assembly  30  of the vaporizer  100  to supply power to the heating assembly  30 . The shell  80  may be substantially cylindrical. The battery  90  may be accommodated at a lower portion of the shell  80 . An accommodating space  81  for accommodating the vaporizer  100  is formed at an upper portion of the shell  80 . 
     As shown in  FIG.  3    and  FIG.  4   , in some embodiments, the vaporizer  100  may include a liquid storage device  10 , a base  20 , a heating assembly  30 , a vent tube  40 , an end cap  50 , a liquid absorbing member  60 , and a suction nozzle assembly  70 . 
     The liquid storage device  10  is configured to store a vaporization liquid and may include a liquid storage housing  11 . In this embodiment, the liquid storage housing  11  is in a cylindrical shape with both ends open. The vent tube  40  passes through the liquid storage housing  11  along a longitudinal direction and may be disposed coaxially with the liquid storage housing  11 . An annular liquid storage space  110  is formed between an outer wall surface of the vent tube  40  and an inner wall surface of the liquid storage housing  11 . An airflow channel  41  is defined by an inner wall surface of the vent tube  40 . In some embodiments, the vent tube  40  may be a glass-fiber tube, so as to reduce the cost. In other embodiments, the vent tube  40  may be made of other materials such as plastic and metal. 
     In some embodiments, the liquid storage device  10  may also include a liquid storage member  12  disposed in the liquid storage space  110 , and the liquid storage member  12  is configured to absorb and store a certain amount of vaporization liquid. The liquid storage member  12  is in an annular column shape, and a through hole  120  for the vent tube  40  to pass through is formed on the liquid storage member  12  along a longitudinal direction. The liquid storage member  12  may usually be a liquid storage cotton to absorb and store more vaporization liquid. In some embodiments, a snap opening  121  is formed on a side wall of the liquid storage member  12 , so that the liquid storage member  12  is in the shape of a C-shaped cylinder, which helps snap the liquid storage member  12  to the periphery of the vent tube  40 . 
     The heating assembly  30  is disposed in the liquid storage housing  11  and is in contact with the liquid storage member  12 , and is configured to heat and vaporize the vaporization liquid stored in the liquid storage member  12  after power on. A vaporization cavity  330  may be formed on the heating assembly  30  along a longitudinal direction. The vaporization cavity  330  may be in communication with a lower end of the airflow channel  41 . The heating assembly  30  may include a composite liquid-guide cotton  31  in contact with the liquid storage member  12  for absorbing the vaporization liquid from the liquid storage member  12 , a heating body  33  disposed in the composite liquid-guide cotton  31  for heating and vaporizing the vaporization liquid after power on, and a heating base  32  for supporting the composite liquid-guide cotton  31 . 
     As shown in  FIG.  5    and  FIG.  6   , in some embodiments, the composite liquid-guide cotton  31  may include at least one heat-resistant layer  311 , at least one first isolation layer  312 , at least one fast liquid guide layer  313 , and at least one second isolation layer  314  that are stacked sequentially. 
     The heat-resistant layer  311  may be in contact with the liquid storage member  12  and the heating body  33  respectively, and may be made of fast-absorbing and high-temperature-resistant materials to prevent burnt smell when heated. In this embodiment, there is one heat-resistant layer  311  made of flax cotton, which has the advantages of quick liquid absorption, quick absorption and quick drying, high temperature resistance, being less likely to produce burnt smell, bacteriostasis, and the like. The flax cotton may be (45±10%) g/m2 before being impregnated. The flax cotton impregnated with the vaporization liquid has a heat-resistant temperature of 200° C. or more, preferably, 300° C. or more. 
     The fast liquid guide layer  313  has a high liquid-guide rate, which is higher than the heat-resistant layer  311 , the first isolation layer  312 , and the second isolation layer  314 . In this embodiment, there are two fast liquid guide layers  313  made of wood pulp cotton, and the wood pulp cotton may be (50±10%) g/m2 before being impregnated. The method of stacking two layers of wood pulp cotton can make the liquid-guide rate higher. In other embodiments, there may be one or more fast liquid guide layers  313 . 
     The first isolation layer  312  and the second isolation layer  314  may be made of materials that can isolate odors, guide liquid quickly, and has high liquid storage capability. The first isolation layer  312  and the second isolation layer  314  may be made of the same materials or different materials. The first isolation layer  312  and the second isolation layer  314  are respectively disposed at two opposite sides of the fast liquid guide layer  313 , which can isolate odors that may be produced by the material of the fast liquid guide layer  313  itself, so that the fast liquid guide layer  313  can have a wider range of material selection, and therefore it is only necessary to consider the liquid-guide rate without worrying about whether odors will be produced when selecting the material of the fast liquid guide layer  313 . In addition, the first isolation layer  312  and the second isolation layer  314  have a liquid storage capability higher than the fast liquid guide layer  313 , that is, the first isolation layer  312  and the second isolation layer  314  have an amount of saturated liquid absorption per unit volume greater than the fast liquid guide layer  313 . In some embodiments, the first isolation layer  312  and the second isolation layer  314  have a liquid storage capability higher than the heat-resistant layer  311 , and the heat-resistant layer  311  has a liquid storage capability higher than the fast liquid guide layer  313 . The first isolation layer  312  and the second isolation layer  314  can store a large amount of vaporization liquid to further avoid dry burning. In this embodiment, there is one first isolation layer  312  and one second isolation layer  314  that are made of non-woven fabric. The non-woven fabric may be (75±10%) g/m2 before being impregnated and may be 0.3-0.4 mm in thickness before being impregnated. The liquid storage amount of the composite liquid-guide cotton  31  can be increased by using 75 g of non-woven fabric. In other embodiments, the first isolation layer  312  and the second isolation layer  314  may be made of other materials such as mixed cotton (mixed by flax cotton and non-woven fabric), non-woven fabric with black spots (cottonseed), and tea fiber. 
     The composite liquid-guide cotton  31  may include a first liquid guide portion  315 , a second liquid guide portion  316 , a first extension portion  317 , and a second extension portion  318 . 
     The cross section of the first liquid guide portion  315  is an annular shape with an opening, and has a first end  3151  and a second end  3152  opposite to the first end  3151  along a circumferential direction. From the inner layer to the outer layer, the first liquid guide portion  315  includes the heat-resistant layer  311 , the first isolation layer  312 , the fast liquid guide layer  313 , and the second isolation layer  314  in sequence. A first cavity  3150  is defined by an inner wall surface of the first liquid guide portion  315 . The first cavity  3150  forms the vaporization cavity  330 . The heating body  33  may be disposed on the inner wall surface of the first liquid guide portion  315 . That is, the heating body  33  is disposed on the heat-resistant layer  311  of the first liquid guide portion  315 . In this embodiment, the heating body  33  may be a heating sheet in a cylindrical shape. In other embodiments, the heating body  33  may be another structure such as a heating wire or a heating film in a spiral shape. 
     The second liquid guide portion  316  is in an annular shape and is disposed at the periphery of the first liquid guide portion  315 , and may be disposed coaxially with the first liquid guide portion  315 . From the outer layer to the inner layer, the second liquid guide portion  316  includes the heat-resistant layer  311 , the first isolation layer  312 , the fast liquid guide layer  313 , and the second isolation layer  314  in sequence. The inner diameter of the second liquid guide portion  316  is larger than the outer diameter of the first liquid guide portion  315 . An annular second cavity  3160  is formed between an inner wall surface of the second liquid guide portion  316  and an outer wall surface of the first liquid guide portion  315 . The second cavity  3160  may be provided for the heating base  32  to pass through. That is, an inner wall surface of the heating base  32  is in contact with the second isolation layer  314  at the outermost layer of the first liquid guide portion  315 , and an outer wall surface of the heating base  32  is in contact with the second isolation layer  314  at the innermost layer of the second liquid guide portion  316 . 
     The heating base  32  may be in the shape of a round tube and may include a base body  321  and an extension portion  322  extending upward from an upper end of the base body  321 . The base body  321  and the extension portion  322  have an equal inner diameter, and the base body  321  may have an outer diameter larger than the extension portion  322 , so that a step surface  323  is formed at a joint of the base body  321  and the extension portion  322 . A lower end of the vent tube  40  may be sleeved outside the extension portion  322 . A lower end surface of the vent tube  40  may abut against the step surface  323 . The outer diameter of the vent tube  40  may be equal to the outer diameter of the base body  321 . 
     The first liquid guide portion  315  may be accommodated in the base body  321 . At least one liquid inlet hole  3210  is also formed on a side wall of the base body  321 , so that the vaporization liquid in the liquid storage member  12  can enter the base body  321  through the at least one liquid inlet hole  3210  to be absorbed by the first liquid guide portion  315 . In this embodiment, there are two liquid inlet holes  3210  arranged symmetrically along the circumference of the base body  321 . 
     At least one open groove  3211  may also be provided on a side wall of the heating base  32 . The open groove  3211  may extend downward along an axial direction from an upper end surface of the extension portion  322 . The first end  3151  and the second end  3152  of the first liquid guide portion  315  may pass through the open groove  3211 . In addition, the open groove  3211  also has the function of communicating the liquid storage member  12  and the first liquid guide portion  315 . In this embodiment, there are two open grooves  3211  arranged symmetrically along the circumference of the heating base  32 , and the open groove  3211  and the liquid inlet hole  3210  may be provided at an included angle of 90 degrees along a circumferential direction of the heating base  32 . 
     The first end  3151  of the first liquid guide portion  315  passes through the open groove  3211  and is connected to one end of the second liquid guide portion  316  in a circumferential direction, and the second end  3152  of the first liquid guide portion  315  passes through the open groove  3211  and extends outward along a radial direction to form the first extension portion  317 . The other end of the second liquid guide portion  316  in the circumferential direction is connected to the second extension portion  318 , and the extension direction of the second extension portion  318  may be the same as the extension direction of the first extension portion  317 . The second extension portion  318  and the first extension portion  317  may be assembled together and then snapped into the snap opening  121  of the liquid storage member  12 . 
     When the heating assembly  30  is assembled, the sheet-shaped composite liquid-guide cotton may be first wrapped around the heating body  33  to form the first liquid guide portion  315 . Then, the first liquid guide portion  315  wrapping the heating body  33  is inserted downward into the heating base  32  through an upper end opening of the heating base  32 , the second end  3152  of the first liquid guide portion  315  extends outward from the open groove  3211  in a radial direction to form the first extension portion  317 , the first end  3151  of the first liquid guide portion  315  passes through the open groove  3211  and is wound around the heating base  32  to form the second liquid guide portion  316 , and then the other end of the second liquid guide portion  316  is attached to the first extension portion  317  to form the second extension portion  318 . Finally, the liquid storage member  12  is wrapped around the heating assembly  30 , and the first extension portion  317  and the second extension portion  318  that are attached together are snapped into the snap opening  121  of the liquid storage member  12 . 
     In this embodiment, the second liquid guide portion  316 , the first extension portion  317 , and the second extension portion  318  of the composite liquid-guide cotton  31  are all in contact with the liquid storage member  12 , so that the contact area of the composite liquid-guide cotton  31  and the liquid storage member  12  is greatly increased, thereby greatly increasing the liquid-absorbing rate of the composite liquid-guide cotton  31 . 
     Further, as shown in  FIG.  3    and  FIG.  4   , the base  20  and the end cap  50  respectively cover both ends of the liquid storage space  110  and may be respectively made of elastic materials such as silica gel, which is conducive to sealing and blocking of both ends of the liquid storage space  110 , so as to reduce liquid leakage. Specifically, the base  20  may be embedded at a lower end opening of the liquid storage housing  11 , that is, an opening of an end of the liquid storage housing  11  close to the battery  90 . The base  20  may be configured to support the liquid storage member  12  and the heating assembly  30 . An air guide hole  21  in communication with the vaporization cavity  330  may be formed on the base  20  along a longitudinal direction. The end cap  50  may be embedded at an upper end opening of the liquid storage housing  11 , that is, an opening of an end of the liquid storage housing  11  close to the suction nozzle assembly  70 . A vent hole  51  in communication with an upper end of the airflow channel  41  may be formed on the end cap  50  along a longitudinal direction. 
     In some embodiments, the end cap  50  may include an end cap body  52  and a nesting portion  53  extending downward from a lower end surface of the end cap body  52 , and the end cap body  52  and the nesting portion  53  may be disposed coaxially. The end cap body  52  is embedded in the upper end opening of the liquid storage housing  11 , and an outer wall surface of the end cap body  52  may be fitted with an inner wall surface of the liquid storage housing  11  in a sealed manner to avoid liquid leakage. A support surface  520  for supporting the liquid absorbing member  60  is formed on an upper end surface of the end cap body  52 . An annular cavity  122  may be formed between the lower end surface of the end cap body  52  and the upper end surface of the liquid storage member  12 , which can prevent the end cap body  52  from squeezing the liquid storage member  12  to cause liquid leakage. In other embodiments, the lower end surface of the end cap body  52  may be in contact with the upper end surface of the liquid storage member  12 . 
     The nesting portion  53  is inserted downward into the airflow channel  41  for assembly. In this embodiment, an outer wall surface of the nesting portion  53  is fitted with the inner wall surface of the vent tube  40  in a sealed manner, and the lower end surface of the end cap body  52  is fitted with the upper end surface of the vent tube  40  in a sealed manner. The outer diameter of the lower end of the nesting portion  53  may be gradually increased from bottom to top, so as to form a guide slope that facilitates insertion into the airflow channel  41 . By reducing the length of the nesting portion  53  extending into the airflow channel  41 , the length of the vaporized gas adsorbed by a hole wall of the vent hole  51  can be reduced, the loss of aroma and sweetness of the vaporized gas can be reduced, and the accumulation of condensate in the vent hole  51  can be reduced. In some embodiments, a length of the nesting portion  53  extending into the airflow channel  41  is less than or equal to 6.5 mm. 
     The liquid absorbing member  60  is supported on the support surface  520  of the end cap  50  and is in contact with the support surface  520 , and is configured to absorb the condensate accumulated in the vent hole  51 , so as to prevent a smoker from inhaling the condensate accumulated in the vent hole  51 . An air outlet hole  61  in communication with the vent hole  51  may be formed on the liquid absorbing member  60  along a longitudinal direction. The liquid absorbing member  60  is usually a liquid absorbing cotton to absorb and store more condensate. 
     As shown in  FIG.  7   , at least one first liquid guide groove  521  may be provided on the support surface  520 , and the first liquid guide groove  521  has a first end  5211  and a second end  5212  opposite to the first end  5211 . The first end  5211  of the first liquid guide groove  521  is in communication with the vent hole  51 , and the second end  5212  of the first liquid guide groove  521  extends away from the vent hole  51 . The condensate in the vent hole  51  may be drained through the first liquid guide groove  521  and then absorbed by the liquid absorbing member  60  in contact with the first liquid guide groove  521 , so as to increase the liquid absorbing rate of the liquid absorbing member  60 . Preferably, there are two or more first liquid guide grooves  521 , and the second end  5212  of the first liquid guide groove  521  extends at least to communicate with an outer edge of a bottom surface of the liquid absorbing member  60 , so that the condensate in the vent hole  51  is drained to the entire bottom surface of the liquid absorbing member  60 . 
     The shape of the first liquid guide groove  521  may not be limited. For example, the first liquid guide groove  521  may be a linear groove or a curved groove. In this embodiment, the first liquid guide groove  521  is a linear groove, the first liquid guide groove  521  may extend along a radial direction of the support surface  520 , and the longest length of the first liquid guide groove  521  is greater than or equal to the radius of the liquid absorbing member  60 . Preferably, the quantity of the first liquid guide groove  521  is directly proportional to the cross-sectional area of the vent hole  51 , that is, a larger cross-sectional area of the vent hole  51  indicates that more first liquid guide grooves  521  are required, resulting in a better liquid guide effect. The two or more first liquid guide grooves  521  may be evenly distributed along a circumferential direction of the support surface  520 , so as to drain the condensate in the vent hole  51  to the entire bottom surface of the liquid absorbing member  60 . 
     Further, at least one second liquid guide groove  522  in communication with the at least one first liquid guide groove  521  may be further provided on the support surface  520 . The condensate in the vent hole  51  is drained to the first liquid guide groove  521  and the second liquid guide groove  522  in communication with the first liquid guide groove  521 , and then absorbed by the liquid absorbing member  60  in contact with the first liquid guide groove  521  and the second liquid guide groove  522 . In this embodiment, the second liquid guide groove  522  is in an annular shape, and each of the annular second liquid guide grooves  522  is in communication with the two or more first liquid guide grooves  521 . Preferably, there may be two or more second liquid guide grooves  522 . When there are a plurality of second liquid guide grooves  522 , the distance between every two adjacent second liquid guide grooves  522  in the plurality of second liquid guide grooves  522  gradually decreases in the direction away from the vent hole  51 , which can help the condensate in the vent hole  51  to spread out to the periphery more quickly to be absorbed by the liquid absorbing member  60 . In this embodiment, the maximum radius of the at least two second liquid guide grooves  522  is equal to the longest length of the first liquid guide groove  521 . It may be understood that, in other embodiments, the support surface  520  may only be provided with the first liquid guide groove  521  without the second liquid guide groove  522 . 
     Further, as shown in  FIG.  3   , the suction nozzle assembly  70  includes a suction nozzle  71  disposed on an upper end of the liquid storage housing  11 , and an inhalation channel  710  in communication with the air outlet hole  61  is formed on the suction nozzle  71  in a longitudinal direction. An upper portion of the liquid storage housing  11 , the end cap  50 , and the liquid absorbing member  60  may all be accommodated in a lower portion of the suction nozzle  71 . 
     Herein, the air guide hole  21 , the vaporization cavity  330 , the airflow channel  41 , the vent hole  51 , the air outlet hole  61 , and the inhalation channel  710  are in communication from bottom to top to form a vapor convey channel  130 . The air guide hole  21  forms an air inlet channel of the vapor convey channel  130  for introducing outside air. The airflow channel  41 , the vent hole  51 , the air outlet hole  61 , and the inhalation channel  710  together form an air outlet channel of the vapor convey channel  130  for discharging the vaporized gas. The outside air enters from the air inlet channel and flows upward to the vaporization cavity  330  to mix with the aerosols produced by heating the vaporization liquid by the heating assembly  30 , and the mixed vaporized gas is then discharged through the air outlet channel to be inhaled by a smoker. 
     In some embodiments, the suction nozzle assembly  70  may also include a sealing plug  72 . The sealing plug  72  may be made of elastic materials such as silica gel. The sealing plug  72  is detachably plugged in an upper end of the inhalation channel  710  and may be configured to seal and block the inhalation channel  710  when the vaporizer  100  is not in use, so as to prevent dust from entering the inhalation channel  710 . 
       FIG.  8    and  FIG.  9    show a vaporizer  100  in a second embodiment of the present disclosure. The main difference from the first embodiment lies in that the liquid storage member  12  in this embodiment is in communication with the outside through an air-pressure balance channel  54 . When the ambient temperature rises, the expanded air by heating inside the vaporizer  100  may be discharged outside the vaporizer  100  through the air-pressure balance channel  54 , which avoids excessive squeezing of the vaporization liquid, thereby resolving the problem of liquid leakage in a high-temperature state. 
     Based on the above, in this embodiment, the air guide hole  21 , the vaporization cavity  330 , the airflow channel  41 , the vent hole  51 , the air outlet hole  61 , and the inhalation channel  710  are in communication from bottom to top to form the vapor convey channel  130 . The air-pressure balance channel  54  is in communication with the vapor convey channel  130  to be in communication with the outside. Preferably, the air-pressure balance channel  54  may be formed by fitting the end cap  50  and the vent tube  40  with a gap, so that the liquid storage member  12  is in communication with the airflow channel  41  and the vent hole  51  through the air-pressure balance channel  54 , and is further in communication with the outside. The air-pressure balance channel  54  is formed by reserving a fitting gap between the end cap  50  and the vent tube  40 , leading to a simple design, and avoiding operations such as opening holes and slots on the components and parts. In some embodiments, a fitting gap between the end cap  50  and the vent tube  40  may be 0-0.1 mm. 
     Specifically, in this embodiment, the end cap  50  may include an end cap body  52  and a nesting portion  53  extending downward from the end cap body  52  into the airflow channel  41 . The vent hole  51  runs through the end cap body  52  and the nesting portion  53  along a longitudinal direction, and may be provided coaxially with the end cap body  52  and the nesting portion  53 . An annular cavity  122  may be formed between the lower end surface of the end cap body  52  and the upper end surface of the liquid storage member  12 . A bottom surface of the end cap body  52  is recessed upward to form a groove  523 , and the groove  523  may be provided coaxially with the end cap body  52 . The nesting portion  53  may be formed by extending a groove bottom surface of the groove  523  downward. 
     The upper end of the vent tube  40  may be accommodated in the groove  523 . A first fitting gap is provided between the inner wall surface of the groove  523  and the outer wall surface of the vent tube  40 . The first fitting gap forms a first channel  541  in communication with the cavity  122 . A second fitting gap is provided between the groove bottom surface of the groove  523  and the upper end surface of the vent tube  40 . The second fitting gap forms a second channel  542  in communication with the first channel  541 . A third fitting gap is provided between the outer wall surface of the nesting portion  53  and the inner wall surface of the vent tube  40 . The third fitting gap forms a third channel  543  in communication with the second channel  542 . The first channel  541 , the second channel  542 , and the third channel  543  are in communication in sequence to form the air-pressure balance channel  54  that communicates the cavity  122  with the airflow channel  41 . When the ambient temperature rises, the expanded air by heating inside the cavity  122  and the expanded air by heating inside the liquid storage member  12  are discharged into the airflow channel  41  sequentially through the first channel  541 , the second channel  542 , and the third channel  543 , and then discharged outside the vaporizer  100  through the vapor convey channel  130 . 
       FIG.  10    shows a vaporizer  100  in a third embodiment of the present disclosure. The main difference from the second embodiment lies in that the end cap  50  in this embodiment includes only the end cap body  52 . Specifically, the vent hole  51  runs through the end cap body  52  in a longitudinal direction, and the upper end of the vent tube  40  extends into the vent hole  51  and is in communication with the vent hole  51 . A fitting gap is provided between the outer wall surface of the vent tube  40  and the hole wall of the vent hole  51 . The fitting gap forms the air-pressure balance channel  54  that communicates the cavity  122  with the vent hole  51 . 
       FIG.  11    shows a vaporizer  100  in a fourth embodiment of the present disclosure. The main difference from the second embodiment lies in that the end cap  50  in this embodiment includes only the end cap body  52 . Specifically, the vent hole  51  extends downward from the upper end surface of the end cap body  52 , the bottom surface of the end cap body  52  is recessed upward to form the groove  523  in communication with the vent hole  51 , and the outer diameter of the groove  523  is greater than the outer diameter of the vent hole  51 . The upper end of the vent tube  40  may be accommodated in the groove  523 . A first fitting gap is provided between the inner wall surface  5231  of the groove  523  and the outer wall surface of the vent tube  40 . The first fitting gap forms a first channel  541  in communication with the cavity  122 . A second fitting gap is provided between the groove bottom surface  5232  of the groove  523  and the upper end surface of the vent tube  40 . The second fitting gap forms a second channel  542  in communication with the first channel  541 . The first channel  541  and the second channel  542  are in communication in sequence to form the air-pressure balance channel  54  that communicates the cavity  122  with the airflow channel  41  and the vent hole  51 . 
       FIG.  12    shows a vaporizer  100  in a fifth embodiment of the present disclosure. The main difference from the second embodiment lies in that, in this embodiment, the lower end surface of the end cap body  52  is in contact with the upper end surface of the liquid storage member  12 , that is, no cavity  122  is formed between the lower end surface of the end cap body  52  and the upper end surface of the liquid storage member  12 . Correspondingly, in this embodiment, the first channel  541  of the air-pressure balance channel  54  is in communication with the liquid storage member  12 . When the ambient temperature rises, the expanded air by heating inside the liquid storage member  12  is discharged into the airflow channel  41  sequentially through the first channel  541 , the second channel  542 , and the third channel  543 , and then discharged outside the vaporizer  100  through the vapor convey channel  130 . 
     It may be understood that the foregoing technical features may be used in any combination without limitation. 
     While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments. 
     The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.