CN210726693U

CN210726693U - Electronic cigarette atomizer capable of preheating cigarette liquid

Info

Publication number: CN210726693U
Application number: CN201921398770.0U
Authority: CN
Inventors: 林光榕; 郑贤彬
Original assignee: Huizhou Xinhongwei Tech Co Ltd; Huizhou Xinhongwei Technology Co Ltd
Current assignee: Huizhou Xinhongwei Tech Co Ltd; Huizhou Xinhongwei Technology Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-06-12
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses an electronic cigarette atomizer capable of preheating cigarette liquid, which comprises a suction nozzle shell, wherein a suction port is arranged at the center of one end of the suction nozzle shell, an opening is formed in the other opposite end of the suction nozzle shell, a smoke outlet pipe is connected inwards from the suction port, an inserting part with reduced outer diameter is arranged outside one side of the opening of the suction nozzle shell, the inserting part is used for being inserted into a connecting end of a battery rod, a sealing sleeve, a heat conduction pipe, an atomizing unit, an atomizing base and a base are sequentially connected from the smoke outlet pipe to one side of the opening in the suction nozzle shell, the atomizing unit comprises a liquid guide strip and a heating wire wound in the middle section of the liquid guide strip, a liquid storage cavity is formed by encircling the inner wall of the suction nozzle shell, the outer wall of the smoke outlet pipe, the outer wall of the heat conduction pipe and the upper end of the atomizing base, the liquid storage cavity is in direct contact with the cigarette liquid; the electronic cigarette atomizer has the beneficial effects that the electronic cigarette atomizer can preheat cigarette liquid and is suitable for atomizing thick cigarette liquid, wax-like cigarette liquid and the like.

Description

Electronic cigarette atomizer capable of preheating cigarette liquid

Technical Field

The utility model relates to an electron cigarette technical field, more specifically the utility model relates to a can preheat electron smog spinning disk atomiser of tobacco juice.

Background

The existing electronic cigarette is generally formed by connecting an electronic cigarette atomizer and a battery rod, smoke is generated by heating electronic cigarette smoke liquid through an electric heating wire and is used by smokers, and the electronic cigarette smoke does not contain cigarette tar which is usually contained in tobacco, so that the electronic cigarette is widely used.

The existing electronic cigarette atomizer has the advantages that the atomized cigarette liquid is generally low in viscosity and good in flowability, does not need to be preheated, does not have the preheating function, and cannot be atomized. The existing electronic cigarette atomizer has the advantages that due to the structure and the manufacturing process, the soft atomizing base is easy to deform during high-temperature work to cause smoke liquid leakage, and smoke generated after the smoke liquid is atomized contains small water drops or small liquid drops to cause poor smoking experience of a user.

Disclosure of Invention

The utility model aims at providing a can preheat electron smog spinning disk atomiser of tobacco juice, this electron smog spinning disk atomiser can preheat the tobacco juice, is applicable to the tobacco juice that the atomizing consistency is great, prevents simultaneously that the tobacco juice from revealing and inhaling the small liquid droplet, supplies the liquid fully can produce big smog volume when smoking.

The technical scheme of the utility model is realized like this: the electronic cigarette atomizer capable of preheating cigarette liquid forms an electronic cigarette when being connected with a battery rod, and comprises a suction nozzle shell, wherein a suction port is arranged in the center of one end of the suction nozzle shell, an opening is formed in the opposite other end of the suction nozzle shell, a smoke outlet pipe is connected inwards from the suction port, a cavity for storing the cigarette liquid, namely a liquid storage cavity, is arranged inside the suction nozzle shell on one side of the suction port, an inserting part with a reduced outer diameter is arranged outside the suction nozzle shell on one side of the opening, and the inserting part is used for being inserted into the connecting end of the battery rod;

a sealing sleeve, a heat conduction pipe, an atomization unit, an atomization seat and a base are sequentially connected to one side of the opening from the smoke outlet pipe in the suction nozzle shell, wherein the atomization unit comprises a liquid guide strip and an electric heating wire wound on the middle section of the liquid guide strip;

the inner wall of the sealing sleeve is sleeved on the outer wall of the smoke outlet pipe, and the inner wall of the upper end of the heat conducting pipe is sleeved on the outer wall of the sealing sleeve;

the atomizing base is arranged on the inner wall of the inserting part, the upper end of the atomizing base is provided with a raised enclosure wall, a cavity is arranged downwards in the enclosure wall, the center of the bottom of the cavity is downwards provided with a first air inlet, the enclosure wall is provided with opposite semi-ring grooves, the liquid guide strip is erected on the semi-ring grooves, the inner wall of the lower end of the heat conduction pipe is sleeved on the outer wall of the enclosure wall, and the lower end of the heat conduction pipe is provided with a notch so that the liquid guide strip can extend out;

the liquid storage cavity is formed by encircling the inner wall of the suction nozzle shell, the outer wall of the smoke outlet pipe, the outer wall of the heat conduction pipe and the upper end of the atomizing seat, the heat conduction pipe is in direct contact with the smoke liquid in the liquid storage cavity, and heat generated when the electric heating wire is heated can be conducted to the smoke liquid so as to preheat the smoke liquid and reduce the viscosity of the smoke liquid;

the base is arranged at the bottom end of the atomizing base and clamped on the inner wall of the opening side of the suction nozzle shell, and the base is provided with a second air inlet hole and positive and negative electrodes electrically connected with lead wires at two ends of the electric heating wire.

Preferably, the smoke outlet pipe is arranged in an outward flaring structure at the suction opening.

Preferably, the cross section of the nozzle shell on the insertion part is an elliptical structure with a gradually reduced outer diameter from bottom to top, and the cross section of the insertion part is an elliptical structure.

Preferably, the cross section of atomizing seat is established to oval structure, the cross section of leg also is established to oval structure, the oval major axis of leg cross section is certain contained angle with the major axis of atomizing seat main part cross section, the atomizing seat is made by high temperature resistant silica gel, the outer wall of atomizing seat is equipped with multichannel integrated into one piece's sealing ring.

Preferably, the upper end of the atomizing seat is also connected with an annular bracket for supporting and fixing the atomizing seat.

Preferably, the lower part of the annular bracket is provided with a bracket foot, and the upper part of the atomizing base is provided with a bracket groove for accommodating the bracket foot.

Preferably, the atomizing seat is provided with a downward annular groove at the outer wall of the enclosing wall, and the annular groove is used for accommodating and fixing the heat conducting pipe.

Preferably, the atomizing seat is provided with a vertically through liquid injection through hole, the base is provided with a plunger corresponding to the liquid injection through hole, and the plunger is used for blocking the liquid injection through hole after the liquid storage cavity is injected with liquid.

Preferably, the base includes bottom plate and lateral wall, be equipped with protruding knot on the lateral wall with the draw-in groove that the suction nozzle shell inner wall was equipped with carries out the buckle and connects.

Preferably, the base is provided with an air inlet pipe, the bottom of the air inlet pipe penetrates through the base and is communicated with the outside atmosphere, the upper end face of the air inlet pipe is provided with a sealing plate which is inclined and sealed, and the side face of the upper end of the air inlet pipe, which is close to the high side of the sealing plate, is provided with the second air inlet hole.

The utility model has the advantages that: this can preheat electron smog spinning disk atomiser of tobacco juice is equipped with heat pipe and the horizontal straight line of drain strip and stretches out the stock solution chamber, start preheating the procedure at the electron cigarette, the atomizing unit produces preheating heat, preheating heat or the unnecessary heat of work pass through the drain strip conduction, or through the radiation, or give the heat pipe through the hot-air conduction, the heat that the heat pipe was collected can conduct rapidly for the tobacco juice, the tobacco juice can preheat, viscosity reduces mobility and increases, make the tobacco juice can flow to heating wire department through the drain strip sooner, make the volume increase of heating wire atomizing tobacco juice, smog increases thereupon. This preheating function makes this electron smog spinning disk atomiser be applicable to atomizing thicker tobacco juice, paste or wax tobacco juice etc.. In addition, the structure of the bell mouth at the suction port and the design of the base air inlet pipe sealing plate can prevent a user from sucking small liquid drops; the heat conduction pipe gap presses the structures of the liquid guiding strip, the annular bracket on the atomizing seat and the base plunger, so that the liquid guiding strip and the atomizing seat can be supported and fixed, the liquid guiding strip and the atomizing seat are prevented from being deformed and loosened when being overheated, and the leakage of smoke liquid is also prevented.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a front cross-sectional view of a nozzle housing in accordance with an embodiment of the present invention;

fig. 3 is a front cross-sectional view of an electronic cigarette atomizer in accordance with an embodiment of the present invention;

fig. 4 is a side sectional view of an electronic cigarette atomizer in accordance with an embodiment of the present invention;

fig. 5 is an exploded view of an electronic cigarette atomizer according to an embodiment of the present invention;

FIG. 6 is a perspective view of the seal cartridge, the heat conductive sleeve, the annular bracket and the atomizing base according to the embodiment of the present invention;

fig. 7 is a perspective view of an atomizing base according to an embodiment of the present invention;

fig. 8 is a sectional view of an atomizing base according to an embodiment of the present invention;

fig. 9 is a perspective view of the heat conductive sleeve according to the embodiment of the present invention;

fig. 10 is a perspective view of a base according to an embodiment of the present invention;

fig. 11 is a front sectional view of a base according to an embodiment of the present invention;

fig. 12 is a side sectional view of a base according to an embodiment of the present invention.

Wherein, the main component symbols illustrate:

1. a mouthpiece housing; 10. a suction port; 11. discharging the smoke tube; 12. an opening; 13. a liquid storage cavity; 14. a plug-in part; 2. sealing sleeves; 3. a heat conducting pipe; 31. a notch; 4. an atomizing unit; 41. a drainage strip; 42. an electric heating wire; 43. a lead wire; 5. an atomizing base; 51. a surrounding wall; 52. a concave cavity; 53. a first air intake hole; 54. a half ring groove; 55. an annular groove; 56. a liquid injection through hole; 57. a bracket groove; 58. a seal ring; 6. a base; 61. a second air intake hole; 62. positive and negative electrodes; 621. an electrode hole; 63. a plunger; 64. a base plate; 65. a side wall; 651. a convex buckle; 66. an air inlet pipe; 661. a sealing plate; 7. an annular support; 71. a support leg; 8. an atomizing chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

The utility model discloses can preheat the electron smog spinning disk atomiser of tobacco juice for following literary composition description, for vertical placing upwards with the suction inlet 10 of this electron smog spinning disk atomiser as shown in fig. 3, this paper "upper and lower, upper portion, lower part, upper end, lower extreme, above-mentioned, following" the description of each part, all refer to the upper and lower position relation when this electron smog spinning disk atomiser suction inlet is vertical placing up.

Examples

As shown in fig. 1 and 2, the utility model relates to an electronic cigarette atomizer capable of preheating smoke liquid, this electronic cigarette atomizer constitutes electronic cigarette when being connected with the battery pole, the atomizer includes suction nozzle shell 1, the one end center of suction nozzle shell 1 is equipped with suction inlet 10, the relative other end is equipped with opening 12, suction inlet 10 is equipped with out tobacco pipe 11 to inside vertical connection, the inside that suction nozzle shell 1 is located suction inlet 10 one side is equipped with the cavity that is used for storing the smoke liquid and stock solution chamber 13 promptly, the outside that suction nozzle shell 1 is located opening one side is equipped with grafting portion 14 of reducing the external diameter, grafting portion 14 is used for pegging graft in the link of battery pole (not shown in the figure). The cross section of the suction nozzle shell 1 positioned on the insertion part 14 is designed into an oval structure with gradually reduced outer diameter from bottom to top, so that the upper part of the suction nozzle shell 1 can be conveniently occluded by lips, the requirement of human engineering is met, the cross section of the insertion part is designed into the oval structure, and the natural transition from top to bottom is facilitated, and the connection with the oval battery rod is realized.

As shown in fig. 3-5, a sealing sleeve 2, a heat conducting pipe 3, an atomizing unit 4, an atomizing base 5, and a base 6 are sequentially connected from the smoke outlet pipe 11 to one side of the opening 12 in the suction nozzle housing 1, the atomizing unit 4 includes a liquid guiding bar 41 and an electric heating wire 42 wound on the middle section of the liquid guiding bar 41, and two ends of the electric heating wire 42 are connected with lead wires 43; the outer wall of the smoke outlet pipe 11 is sleeved with the inner wall of the sealing sleeve 2, the outer wall of the sealing sleeve 2 is sleeved with the inner wall of the upper end of the heat conducting pipe 3, and the sealing sleeve has the effect of hermetically connecting the smoke outlet pipe 11 and the heat conducting pipe 3. The smoke outlet pipe 11 is provided with a flared structure at the suction port 10, and the flared structure helps to increase the amount of smoke and reduce the content of water droplets or liquid drops in the smoke, because the water droplets or liquid drops in the smoke are easy to adhere to the inner wall of the flared structure when passing through the flared structure, thereby reducing the probability of being directly sucked into the suction port by a user. The liquid storage cavity 13 is formed by enclosing the inner wall of the suction nozzle shell 1, the outer wall of the smoke outlet pipe 11, the outer wall of the heat conduction pipe 3 and the upper end of the atomizing base 5, the heat conduction pipe 3 is in direct contact with the smoke liquid of the liquid storage cavity 13, and heat generated when the electric heating wire 42 is heated can be conducted to the smoke liquid so as to preheat the smoke liquid and reduce the viscosity of the smoke liquid, and the liquidity of the smoke liquid is enhanced.

The heat pipe 3 is made of a material which is easy to conduct heat, such as a metal material, when the electronic cigarette starts a preheating program, the atomizing unit 4 generates preheating heat, or when the electronic cigarette normally works, the atomizing unit 4 generates working heat, the preheating heat or the heat which is redundant in working is conducted to the heat pipe 3 through the liquid guide bar 41, or is conducted to the heat pipe 3 through radiation or hot air, the heat collected by the heat pipe 3 can be quickly conducted to the cigarette liquid, the cigarette liquid can be preheated, the viscosity is reduced, the mobility is increased, the cigarette liquid can be quickly conducted to the electric heating wire 42 through the liquid guide bar 41, the amount of the cigarette liquid atomized by the electric heating wire 42 is increased, and the smoke is increased accordingly. This preheating function makes this electron smog spinning disk atomiser be applicable to atomizing thicker tobacco juice, paste or wax tobacco juice etc..

The upper end of the atomizing base 5 is also connected and provided with an annular support 7 for supporting the fixed atomizing base, the annular support 7 is used for downwards and transversely supporting the soft atomizing base 5, when the temperature is high, the atomizing base 5 is further softened, deformation is easy to occur, the heat conduction pipe 3 is poor in contact with the atomizing base 5, leakage is generated, and smoke liquid is easy to leak out of the electronic cigarette from the liquid storage cavity 13 to the cavity 52. Further, the lower part of ring carrier 7 still is equipped with support foot 71, and the upper portion of atomizing seat 5 is equipped with support groove 57 and is used for holding support foot 71, and support foot 71 is connected with support groove 57 interlock, can make ring carrier 7 support better and fix atomizing seat 5, prevents that the electron smog spinning disk atomiser from producing the leakage of tobacco juice during high temperature operation.

As shown in fig. 5-9, the atomizing base 5 is disposed on the inner wall of the inserting portion 14, a raised surrounding wall 51 is disposed at the upper end of the atomizing base 5, a cavity 52 is disposed downward in the surrounding wall, a first air inlet 53 is disposed downward at the center of the bottom of the cavity, opposite semi-circular grooves 54 are disposed on the surrounding wall, the liquid guiding bar is erected on the semi-circular grooves 54, the inner wall of the lower end of the heat conducting pipe 3 is sleeved on the outer wall of the surrounding wall 51, and a notch 31 is disposed at the lower end of the heat conducting pipe 3 so that the liquid. The raised surrounding wall 51, the cavity 52 and the half-ring groove 54 can well erect the liquid guiding bar 41, the cavity 52 and the cavity of the upper heat conduction pipe 3 form a larger atomization cavity 8, and the liquid guiding bar 41 and the heating wire 42 can be in more contact with air, so that the smoke liquid can be better atomized, and more electronic cigarette smoke can be generated. The lower extreme of heat pipe 3 is equipped with breach 31 so that drain bar 41 transversely straight line stretches out, make heat pipe 3 can push down the both ends of drain bar 41 from the top, make drain bar 41 middle section can not warp and sink, maintain stable atomizing condition, drain bar 41 stretches out the outside of heat pipe 3, stretch out the bottom in stock solution chamber 13 promptly, make drain bar 41 both ends can direct contact the tobacco juice in stock solution chamber 13, can give atomizing unit 4 supply tobacco juice more sooner, thereby it is smooth and easy to make the tobacco juice atomizing, make the user obtain better smoking experience. In addition, the liquid guiding bar 41 is transversely and linearly erected, two ends of the liquid guiding bar extend out of the liquid storage cavity 13 to be in direct contact with the tobacco juice, and the heat of the electric heating wire 42 can be transferred to the tobacco juice in the liquid storage cavity 13 when the electronic cigarette is preheated, so that a certain preheating effect is achieved.

The cross section of atomizing seat 5 is established to the oval structure, and the cross section of surrounding wall 51 also establishes to the oval structure, and the oval major axis of surrounding wall 51 cross section is certain contained angle with the major axis of atomizing seat main part cross section, and such structure can make cavity 52 have bigger volume, and when the atomizing volume increased, can make the later-mentioned notes liquid through-hole 56 have compact position arrangement again, avoids increasing the horizontal area of atomizing seat, avoids increaseing the horizontal area of electron cigarette promptly. Atomizing seat 5 is made by high temperature resistance silica gel, and atomizing seat 5's outer wall is equipped with multichannel integrated into one piece's sealing ring 58, helps increasing atomizing seat 5 and the leakproofness of the inner wall of suction nozzle shell 1 like this, prevents that the tobacco juice from stock solution chamber leakage.

The atomizing base 5 is provided with a downward annular groove 55 at the outer wall of the surrounding wall 51, the annular groove 55 is used for accommodating and fixing the heat conducting pipe 3, so that the annular groove 55 can clamp the heat conducting pipe 3, the connection between the two is more tight, the supporting and fixing effects are good, and the sealing performance is better.

The atomizing seat 5 is equipped with annotates liquid through-hole 56 that link up from top to bottom, is equipped with on the base 6 with annotate the corresponding plunger 63 in liquid through-hole 56 position, and plunger 63 is used for blockking up through-hole 56 after annotating liquid through-hole 56 for stock solution chamber 13, avoids the tobacco juice to leak. The plunger 63 penetrates through the liquid injection through hole 56, so that the function of supporting and fixing the atomizing base 5 is achieved, the soft atomizing base 5 is prevented from being deformed at high temperature to cause loosening and loosening with the suction nozzle shell, and smoke liquid leakage caused by loosening and loosening is avoided.

As shown in fig. 10-12, the base 6 is disposed at the bottom end of the atomizing base 5 and is clamped to the inner wall of the opening side of the nozzle housing 1, the base 6 is provided with a second air inlet 61, a positive electrode 62 electrically connected to the leads at the two ends of the heating wire, and an electrode hole 621 for installing the positive electrode 62, and the base 6 has an effect of upwardly supporting and fixing the atomizing base 5.

The base 6 comprises a bottom plate 64 and a side wall 65, and a convex button 651 arranged on the side wall 65 is connected with a clamping groove arranged on the inner wall of the suction nozzle shell 1 in a buckling manner. After the side wall 65 is provided, the bottom plate 64 and the bottom of the atomizing base 5 have a space gap, the gap is used for air to enter the first air inlet 53 of the atomizing base 5, and meanwhile, the gap can also collect small liquid drops which are generated when the smoke liquid in the atomizing chamber 8 is atomized, are attached to the inner wall of the atomizing chamber 8 and flow downwards, and the small liquid drops are prevented from being sucked into the mouth of a user.

Be equipped with intake pipe 66 on base 6, intake pipe 66 bottom is run through base 6 and is communicated with each other with external atmosphere, intake pipe 66 up end is equipped with slope confined sealing plate 661, the side that the intake pipe 66 upper end is close to the high side of sealing plate 661 is equipped with second inlet port 61, the beneficial effect of sealing plate 661 lies in can preventing that the droplet that drops in the first inlet port 53 is direct to continue to drop to the outside of base 6 through intake pipe 66, it is inside even further flowing to the battery pole, the circuit in the battery pole can be corroded to the droplet of long-term leakage, cause the trouble of circuit. The inclined sealing plate 661 can block the small liquid droplets and make the small liquid droplets fall into the gap formed by the bottom plate 64, the side wall 65 and the bottom of the atomizing base 5 along with the potential flow, thereby preventing the small liquid droplets in the mist from leaking out of the base and further preventing the circuit failure.

As shown in fig. 3, the direction indicated by the continuous arrows from bottom to top is the air and smoke flow direction. The utility model discloses the theory of operation of smoking is, suction inlet 10 and atomizing chamber 8 produce the negative pressure during user's smoking, outside air is inhaled from intake pipe 66 of base 6, through the first inlet port 53 of atomizing seat, cavity 52, atomizing chamber 8, the tobacco juice conduction to heating wire 42 in the stock solution chamber 13 of drain bar 41, heating wire 42 circular telegram work can produce the heat, this heat heats the tobacco juice and becomes smog in atomizing chamber 8, smog in atomizing chamber 8 is under user's suction effect, upwards flow to play tobacco pipe 11, then in by the user's sunction inlet through suction inlet 10.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Within the scope of the technical idea of the present invention, various modifications and alterations can be made, and any person skilled in the art can make modifications, amendments or equivalent replacements according to the above description, all belonging to the protection scope of the present invention.

Claims

1. The utility model provides a can preheat electron smog spinning disk atomiser of tobacco juice constitutes electron cigarette when being connected with the battery pole, its characterized in that: the cigarette holder comprises a suction nozzle shell, wherein a suction port is arranged in the center of one end of the suction nozzle shell, an opening is formed in the opposite end of the suction nozzle shell, a cigarette outlet pipe is connected inwards from the suction port, a cavity for storing cigarette liquid, namely a liquid storage cavity, is arranged inside the suction nozzle shell on one side of the suction port, an inserting part with a reduced outer diameter is arranged outside the suction nozzle shell on one side of the opening, and the inserting part is used for being inserted into a connecting end of a battery rod;

2. The electronic cigarette atomizer of claim 1, wherein: the smoke outlet pipe is arranged at the suction port to form a flared structure expanding outwards.

3. The electronic cigarette atomizer of claim 1, wherein: the cross section of the suction nozzle shell on the insertion part is of an oval structure with the gradually reduced outer diameter from bottom to top, and the cross section of the insertion part is of an oval structure.

4. The electronic cigarette atomizer of claim 3, wherein: the cross section of atomizing seat is established to oval structure, the cross section of leg also is established to oval structure, the oval major axis of leg cross section is certain contained angle with the major axis of atomizing seat main part cross section, the atomizing seat is made by high temperature resistant silica gel, the outer wall of atomizing seat is equipped with multichannel integrated into one piece's sealing ring.

5. The electronic cigarette atomizer of claim 1, wherein: the upper end of the atomizing seat is also connected with an annular bracket for supporting and fixing the atomizing seat.

6. The electronic cigarette atomizer of claim 5, wherein: the lower part of the annular bracket is provided with bracket feet, and the upper part of the atomizing base is provided with a bracket groove for accommodating the bracket feet.

7. The electronic cigarette atomizer of claim 1, wherein: the atomizing seat is provided with a downward annular groove at the outer wall of the enclosing wall, and the annular groove is used for accommodating and fixing the heat conducting pipe.

8. The electronic cigarette atomizer of claim 1, wherein: the atomizing seat is provided with a vertically through liquid injection through hole, the base is provided with a plunger corresponding to the liquid injection through hole in position, and the plunger is used for blocking the liquid injection through hole after liquid injection of the liquid storage cavity.

9. The electronic cigarette atomizer of claim 1, wherein: the base comprises a bottom plate and a side wall, wherein a convex buckle is arranged on the side wall and is connected with a clamping groove formed in the inner wall of the suction nozzle shell in a buckling mode.

10. The electronic cigarette atomizer of claim 1, wherein: the base is provided with an air inlet pipe, the bottom of the air inlet pipe penetrates through the base to be communicated with the outside atmosphere, the upper end face of the air inlet pipe is provided with a sealing plate which is inclined and sealed, and the side face, close to the high side of the sealing plate, of the upper end of the air inlet pipe is provided with the second air inlet hole.