TWI628395B - Liquid fuel stove - Google Patents

Abstract

A liquid fuel furnace includes a container, a base, a main pipe, an adjusting member, and an adjusting rod, wherein the container is used for containing liquid fuel, an opening is formed at the top end of the container, and the base is provided at the opening. A main pipe shaft is provided on the base, the bottom end of the main pipe extends inside the container, the top end of the main pipe extends in the top space of the base, the main pipe is provided with a heating cap at the top, the adjusting member pivotally covers the main pipe, and the adjusting rod One end is laterally connected to the regulating member; the main pipe laterally penetrates a plurality of first air outlets, each of the first air outlets is respectively formed between the top edge of the base and the heating cap, and each of the first air outlets According to the main axis of the main pipe, the center of the heating cap is radially distributed. A second air vent is formed at the top of the heating cap. The second air vent communicates with the main pipe. The main pipe is provided with a plurality of inner cores, and the bottom end of each inner core extends Inside the container, the top ends of the inner cores are respectively adjacent to the bottom edges of the first air outlets, and the liquid fuel inside the container flows to the top ends of the inner cores; the adjusting member cooperates with the sides of the first air outlets. Out through several thirds And each of the third hole are adjacent to the each of the first outlet hole.

Operating the adjustment lever to rotate the adjustment member can change the amount of heat provided to the heating cap, thereby adjusting the rate at which liquid fuel vaporizes into a gaseous fuel, and changing the heat provided to the heated object. The amount of firepower.

Description

Liquid fuel stove

The present invention relates to a heating appliance using liquid fuel, and more particularly, to a liquid fuel furnace.

An alcohol lamp is a heating appliance that uses liquid alcohol as a fuel. It is common practice that an alcohol lamp mainly includes a container, a lid, a copper ring and a cotton core. The container is used to hold alcohol, and the lid is provided at the opening at the upper end of the container. The copper ring is set in the space above the cover. The two ends of the copper ring pass through the cover and enter the container. The cotton core is located inside the copper ring, and the two ends of the cotton core extend outside the copper ring. The cotton core is used to absorb the inside of the container. Alcohol allows the alcohol to enter the inside of the copper ring. The copper ring runs through several nozzles, so that the alcohol can escape from the copper ring through each nozzle and be ignited to form a flame.

The aforementioned alcohol lamp cannot adjust the size of the flame providing heat.

The main purpose of the present invention is to provide a liquid fuel furnace, which can adjust the amount of firepower to provide heat as needed.

The invention relates to a liquid fuel furnace, comprising a container, a base, a main pipe, an adjusting member and an adjusting rod, wherein the container is used for containing liquid fuel, an opening is formed at the top of the container, and the base is provided on the container. An opening, the main shaft is arranged on the base, the bottom end of the main pipe extends inside the container, the top end of the main pipe extends in the top space of the base, the main pipe is provided with a heating cap at the top, and the adjusting member pivotally covers the main pipe, One end of the adjusting rod is laterally connected to the adjusting member, and is used for actuating. The adjusting member rotates back and forth; the main pipe laterally penetrates a plurality of first air outlet holes, each of the first air outlet holes is respectively formed between the top edge of the base and the heating cap, and each of the first air outlet holes is according to the main shaft The center is centered in a radial distribution. The outer diameter of the heating cap is larger than the outer diameter of the adjusting member. The top of the heating cap forms a second air vent. The second air vent communicates with the main pipe, and the interior of the main pipe follows the main pipe. A plurality of inner cores are provided in the long axis direction. Each of the inner cores is a wire body made of a heat-resistant material. The bottom end of each of the inner cores extends into the container through the bottom end of the main pipe. The top ends of each of the inner cores are adjacent to each other. The bottom edge of the first air outlet, the main pipe internally forms a plurality of channels with a small width by each of the inner cores, so that the liquid fuel inside the container flows along the channels to the top of each inner core; the adjustment The pieces cooperate with each of the first air outlet holes to pass through several third air outlet holes laterally, and each of the third air outlet holes is respectively formed between the top edge of the base and the bottom edge of the heating cap, and each of the third air outlet holes is adjusted according to the adjustment. The axis of the pieces is radially distributed at the center, and each The third hole are adjacent to the each of the first outlet hole.

The liquid fuel furnace as described above, wherein the base forms a containing chamber on the axis, the base forms a through groove on one side of the containing chamber, the adjusting member pivots on the containing chamber, and one end of the adjusting rod passes through The through slot is laterally connected to the adjusting member, and the other end of the adjusting rod extends outward from the side of the base.

The liquid fuel furnace as described above, wherein the base is provided with a plurality of auxiliary pipes, and each of the auxiliary pipes is respectively arranged in a circle around the main pipe, and the auxiliary pipes can supply more fuel and a larger heating area; each The auxiliary tube is composed of a straight portion and an arc portion, the straight portion is provided on the base, the bottom end of the straight portion extends inside the container, and the top of the straight portion is connected to the arc portion. , The arc-shaped portion is connected with the heating cap, and each of the auxiliary tubes forms a first portion on the top edge of the arc-shaped portion. There are four air outlets, and each of the auxiliary tubes is provided with a plurality of inner cores along the long axis direction of the straight portion inside the straight portion. Each of the inner cores is a wire body made of a heat-resistant material. The bottom end is respectively extended at the bottom end of the straight portion, and the top end of each inner core is respectively extended at the top end of the straight portion. Inside the auxiliary tube, a plurality of channels with a small width are formed by each of the inner cores. The liquid fuel inside the container flows to each of the arc-shaped portions along the passage; each of the first air outlet holes is respectively directed to a straight portion of each of the auxiliary tubes.

The liquid fuel furnace as described above, wherein the heating cap pivots a connecting member, the connecting member is screwed to the main pipe, and the second air outlet hole communicates with the main pipe through the connecting member.

By operating the adjustment lever to rotate the adjustment member, the amount of heat provided to the heating cap and each of the auxiliary tubes can be changed, and the rate of vaporization of liquid fuel to gaseous fuel can be adjusted according to this to change the amount of firepower provided to the heated object.

(1) ‧‧‧container

(11) ‧‧‧Opening

(2) ‧‧‧ base

(21) ‧‧‧Room

(22) ‧‧‧through groove

(3) ‧‧‧Supervisor

(31) ‧‧‧Heating Cap

(32) ‧‧‧First vent

(33) ‧‧‧Second vent

(34) ‧‧‧Inner core

(35) ‧‧‧Connector

(4) ‧‧‧Adjustment

(41) ‧‧‧Third vent

(5) ‧‧‧Adjustment lever

(6) ‧‧‧ Deputy

(61) ‧‧‧Straight

(62) ‧‧‧Arc

(63) ‧‧‧The fourth vent

(64) ‧‧‧Inner core

The first figure is a perspective view of the first embodiment of the present invention.

The second figure is an exploded perspective view of the first embodiment of the present invention.

The third figure is a schematic cross-sectional view of the main part of the first embodiment of the present invention.

The fourth figure is a perspective view of the second embodiment of the present invention.

The fifth figure is an exploded perspective view of the second embodiment of the present invention.

The sixth diagram is a schematic sectional view of the main pipe and the auxiliary pipe in the second embodiment of the present invention.

As shown in the first to third figures, the first embodiment of the liquid fuel furnace of the present invention includes a container (1), a base (2), a main pipe (3), an adjustment member (4), and an adjustment Rod (5), where the The container (1) is used for containing liquid fuel, and the liquid fuel may be alcohol, kerosene, kerosene or gasoline or other flammable liquid flammable substances. An opening (11) is formed on the top of the container (1), and the base (2) is provided with In the opening (11), the main pipe (3) is axially disposed on the base (2), the bottom end of the main pipe (3) extends inside the container (1), and the top end of the main pipe (3) extends on the base ( 2) head space, the main pipe (3) is provided with a heating cap (31) at the top, the adjusting member (4) pivotally covers the main pipe (3), one end of the adjusting rod (5) and the side of the adjusting member (4) When they are connected to each other, the adjusting lever (5) is used to stop the adjusting member (4) from rotating back and forth.

The main pipe (3) penetrates through a plurality of first air outlets (32) laterally, and each of the first air outlets (32) is respectively formed between the top edge of the base (2) and the heating cap (31), and each The first air outlets (32) are distributed radially according to the axis of the main pipe (3) as the center. The outer diameter of the heating cap (31) is larger than the outer diameter of the adjusting member (4). The top of the heating cap (31) A plurality of second air vents (33) are formed, and each of the second air vents (33) communicates with the main pipe (3), and the number of the second air vents (33) can be increased or decreased as required. The main pipe (3) A plurality of inner cores (34) are provided along the long axis direction of the main pipe (3). Each of the inner cores (34) is a wire body made of a heat-resistant material. Each of the inner cores (34) may be a carbon fiber wire or glass. Fiber or metal wire, the bottom end of each inner core (34) extends inside the container (1) through the bottom end of the main pipe (3), and the top end of each inner core (34) is adjacent to each of the first air outlets The bottom edge of (32), inside the main pipe (3), each of the inner cores (34) forms a plurality of channels (not shown) with a small width. According to the capillary phenomenon, the liquid fuel inside the container (1) is due to capillary phenomenon. While flowing along the channel to the top of each inner core (34) .

The adjusting member (4) cooperates with each of the first air outlets (32) to penetrate through a plurality of third air outlets (41) laterally, and each of the third air outlets (41) is formed on the top edge of the base (2) and Between the bottom edge of the heating cap (31), each of the third air outlets (41) is radially distributed according to the axis of the adjustment member (4) as the center, and each of the third air outlets (41) and each of the three The first air outlets (32) are adjacent, and the liquid fuel is vaporized into a gaseous fuel and passes through the first air outlets (32) and each of the third air outlets (41) to the outside of the adjusting member (4). The side escapes, and further, the adjustment lever (5) is operated to reciprocate the adjustment member (4) to adjust and change the first air outlet (32) and the third air outlet (41) adjacent to each other. The area of communication changes the size of the path of gaseous fuel escaping to the outside of the adjusting member (4) through each of the first air outlets (32) and each of the third air outlets (41).

The base (2) can optionally form a receiving chamber (21) on the axis, the base (2) forms a through groove (22) on one side of the receiving chamber (21), and the adjusting member (4) It is a circular pipe body, the adjusting member (4) is pivoted to the accommodation chamber (21), one end of the adjusting rod (5) is connected to the adjusting member (4) laterally through the through groove (22), and the adjusting rod (5) The other end extends outward from the side of the base (2).

Operate the adjusting lever (5) to rotate the adjusting member (4), so that each of the first air outlets (32) communicates with each of the adjacent third air outlets (41), and use a lighter or an igniter to ignite The appliance ignites the flame and moves closer to the adjusting member (4). The vaporized fuel escaped through each of the first air outlets (32) and each of the third air outlets (41) is ignited to form a mother flame, each of the third outlets The mother fire at the air hole (41) respectively heats the heating cap (31). The heating cap (31) heats up and transfers heat energy to the main pipe (3), so that the main pipe (3) heats up. The liquid fuel is accelerated to vaporize into a gaseous fuel, and the gaseous fuel is ejected into the top space of the heating cap (31) through each of the second air outlets (33). Since the heating cap (31) is heated and heated by the mother fire, when the gaseous fuel is heated by each When the second air outlet (33) is ejected, the gaseous fuel is heated and burned to form a heating flame that can be used to heat an object to be heated (for example, a cooker, a kettle).

If it is desired to adjust the heating power for heating the object to be heated, the adjustment lever (5) can be pulled to rotate the adjustment member (4) to change the gaseous fuel through each of the first air outlets (32) and each of the third outlets. The size of the path of the air hole (41) to the outside of the regulating member (4), thereby changing the flow rate of the gaseous fuel to the outside of the regulating member (4).

When the flow rate of gaseous fuel flowing out of the regulating member (4) increases, the firepower of the mother fire As the temperature rises, the heat provided by the mother flame to the heating cap (31) increases, and the rate at which the liquid fuel inside the main pipe (3) evaporates to a gaseous fuel increases. The gaseous fuel is ejected through each of the second air outlets (33) and burns. The firepower that forms the heating flame rises.

When the flow rate of the gaseous fuel flowing out of the regulating member (4) decreases, the firepower of the mother fire decreases, and the heat provided by the mother fire to the heating cap (31) decreases. The liquid fuel inside the main pipe (3) vaporizes into a gaseous fuel. The rate decreases, and the firepower of the heating flame formed by the gaseous fuel ejected and combusted through each of the second vent holes (33) is reduced.

If it is desired to further reduce the heating power for heating the object to be heated, the operating lever (5) is operated to rotate the adjusting member (4), so that each of the third air outlets (41) and each of the adjacent first air outlets ( 32) Dislocation and disconnection from each other, gaseous fuel cannot flow out of the regulating member (4) through each of the third air outlet holes (41), and the mother fire formed on the outside of the regulating member (4) is unable to obtain fuel supply and is extinguished. The heating cap (31) cannot obtain the heat supply from the mother fire. Before the mother fire is extinguished, the heat generated by the mother fire and the heating flame causes the heating cap (31) to rise to a considerable temperature. After the mother fire is extinguished, the heating The heat generated by the flame can still maintain the temperature of the heating cap (31) at a medium-high temperature state, and the liquid fuel inside the main pipe (3) can still be heated and vaporized, but the rate of vaporization is reduced, thereby further reducing the change of the heating cap (31). ) The fire power of the heating flame at the top forms a small fire heating state for the object to be heated. Further, when the third air outlets (41) and the adjacent first air outlets (32) are misaligned with each other, the outer ends of the first air outlets (32) are adjusted by the adjusting member ( 4) At the time of shielding, the main pipe (3) is still in a high temperature state, and the pressure of the internal fuel vaporized to form a gaseous fuel can be buffered by the second outlet holes (33) above, effectively reducing the backflow of hot gaseous fuel The total amount inside the container (1) reduces the possibility of overheating the liquid fuel inside the container (1).

After the mother fire is extinguished and the small fire is heated as described above, if you want to increase the The heating power of the object is heated, and the adjusting rod (5) is operated to rotate the adjusting member (4), so that each of the third air outlets (41) is communicated with each of the adjacent first air outlets (32), and the heating cap ( The thermal diffusion phenomenon of 31) makes the outer space of the adjusting member (4) exhibit a medium-high temperature state, so that when the gaseous fuel flows out of each of the third air outlets (41), it can be ignited to form a mother fire. The mother fire provides heat to the heating cap (31), accelerates the vaporization rate of the liquid fuel inside the main pipe (3), and increases the firepower of the heating flame at the top of the heating cap (32).

The user can operate the adjustment lever (5) according to the heating needs, control the rotation direction and rotation angle of the adjustment member (4), change the amount of heat provided to the heating cap (31), and adjust the vaporization of the liquid fuel to a gas state. The rate of fuel changes the amount of firepower that provides heat to the heated object.

The second embodiment is obtained by changing the first embodiment. As shown in the fourth to sixth figures, the second embodiment includes a container (1), a base (2), a main pipe (3), and an adjusting member. (4) An adjusting rod (5) and six auxiliary tubes (6), wherein the second embodiment has the same structure as that of the first embodiment, and will not be repeatedly described. Each of the auxiliary tubes (6) is axially disposed on the base. (2), and each of the deputy pipes (6) is respectively listed in the outer periphery of the main pipe (1).

Each of the auxiliary pipes (6) is composed of a straight portion (61) and an arc portion (62). The straight portion (61) is provided on the base (2), and the bottom of the straight portion (61). The ends extend inside the container (1), the top of the straight portion (61) is connected to the arc portion (62), the arc portion (62) is connected to the heating cap (31) at the top of the main pipe (3) In contact, each of the auxiliary pipes (6) forms a fourth air vent (63) at the top edge of the arc-shaped portion (61), and each of the auxiliary pipes (6) is respectively inside the straight-shaped portion (61) A plurality of inner cores (64) are provided along the long axis direction of the straight portion (61). Each of the inner cores (64) is a wire body made of a heat-resistant material. Each of the inner cores (64) may be a carbon fiber wire, Glass fiber wire or metal wire, the bottom ends of each of the inner cores (64) extend respectively to the bottom ends of the straight portions (61), and the top ends of each of the inner cores (64) extend respectively to the straight portions (61) The top of the auxiliary tube (6) Each of the inner cores (64) forms a plurality of channels (not shown) with a small width. According to the capillary phenomenon, the liquid fuel inside the container (1) flows along the channels to the arc-shaped parts. (62).

The main pipe (3) cooperates with each of the auxiliary pipes (6) and penetrates through the six first air outlet holes (32) laterally, and each of the first air outlet holes (32) points respectively to the straight portion of the auxiliary pipe (6) ( 61), the adjusting member (4) cooperates with each of the first air outlets (32), penetrates through the six third air outlets (41) laterally, the heating cap (31) is sleeved on the top of the main pipe (3), and The heating cap (31) pivots a connecting member (35), the connecting member (35) is screwed with the main pipe (3), and the second air outlet (33) runs through the connecting member (35) and the main pipe (3) Connected.

The number of the auxiliary pipes (6) can be increased or decreased as required, and the number of the auxiliary pipes (6) is at least two, and preferably three or more, the first air outlet (32) and the third outlet The number of air holes (41) is matched with the increase or decrease of the number of the auxiliary tubes (6), and each of the auxiliary tubes (6) can supply more fuel and a larger heating area.

When the second embodiment is used as a heating device, the mother fire is ignited according to the same operation method as the embodiment, and the mother fire at each of the third air outlets (41) is respectively for the heating cap (31) and the adjacent sub-pipes ( 6) Heating to heat up the heating cap (31) and each of the auxiliary pipes (6), the liquid fuel inside the main pipe (3) and each of the auxiliary pipes (6) is accelerated to vaporize into a gaseous fuel, and the inside of the main pipe (3) The gaseous fuel is ejected through the second vent hole (33) to the top space of the heating cap (31), and the gaseous fuel inside the auxiliary pipe (6) is ejected upward through the fourth vent hole (63). (31) When heated by the mother flame, the gaseous fuel is burned to form a heating flame when the gaseous fuel is ejected from the second gaseous hole (33) and each of the fourth gaseous holes (63).

Trigger the adjustment lever (5) to rotate the adjustment member (4) to change the size of the path of gaseous fuel flowing out of the adjustment member (4), thereby changing the gaseous fuel to flow out of the adjustment member (4) sideways The flow rate of the mother fire is adjusted.

When the flow rate of the gaseous fuel flowing out of the regulating member (4) increases, the firepower of the mother fire increases, and the heat provided by the mother fire to the heating cap (31) and each of the auxiliary pipes (6) increases, and the main pipe (3) ) And the rate of vaporization of the liquid fuel inside each of the auxiliary tubes (6) to a gaseous fuel is increased, and the gaseous fuel is ejected and burned through the second air outlet (33) and each of the fourth air outlet (63) to form a heating flame. Firepower rises.

When the flow rate of the gaseous fuel flowing out of the regulating member (4) decreases, the firepower of the mother fire decreases, and the heat provided by the mother fire to the heating cap (31) and each of the auxiliary pipes (6) decreases, and the main pipe (3) and The rate at which the liquid fuel inside each of the auxiliary pipes (6) evaporates into a gaseous fuel decreases, and the gaseous fuel sprays and burns through the second air outlets (33) and each of the fourth air outlets (63) to reduce the firepower of the heating flame formed. .

If it is desired to further reduce the heating power for heating the object to be heated, the operation lever (5) is operated to rotate the adjustment member (4) so that gaseous fuel cannot flow out to the side of the adjustment member (4) and is formed on the adjustment member (4) The mother fire on the outside cannot be extinguished without fuel supply, and the heating cap (31) and each of the auxiliary tubes (6) cannot obtain heat supply from the mother fire. Before the mother fire goes out, the mother fire and the heating flame The heat causes the heating cap (31) and each of the auxiliary tubes (6) to rise to a considerable degree of high temperature. After the mother fire is extinguished, the heat generated by the heating flame can still maintain the temperature of the heating cap (31) at a medium and high temperature. The thermal diffusion effect of the heating cap (31) allows the liquid fuel inside the main pipe (3) and each of the auxiliary pipes (6) to still heat up and vaporize, but the rate of vaporization is reduced, thereby further reducing the firepower of the heating flame. A small fire heating state is formed on the object to be heated. Same as in the first embodiment, when the third air outlets (41) and adjacent first air outlets (32) are misaligned and disconnected from each other, the outer ends of the first air outlets (32) are adjusted by the adjustment. When the piece (4) is shielded, the main pipe (3) is still in a high temperature state, and the pressure of the internal fuel vaporized by the main pipe (3) to form a gaseous fuel can release the buffer from the second vent hole (33) above, effectively reducing heat. The total amount of gaseous fuel flowing back inside the container (1) reduces the possibility of liquid fuel overheating inside the container (1).

As described above, after the mother flame is extinguished to form a small-fire heating state, if the firepower for heating the object to be heated is increased, the adjustment lever (5) is operated to rotate the adjustment element (4), and the gaseous fuel flows out of the adjustment element ( 4), and is ignited to form a mother fire. After the mother fire is ignited, the mother cap can provide heat to the heating cap (31) and each of the auxiliary pipes (6), and accelerate the main pipe (3) and each of the auxiliary pipes. The rate of vaporization of the liquid fuel inside the tube (6) increases the firepower of the heating flame.

The second embodiment can also adjust the rate of vaporization of liquid fuel to gaseous fuel, change the amount of heat provided to the heating cap (31) and each of the auxiliary tubes (6), and change the amount of firepower provided to the heated object.

Further, in the second embodiment, the end of the arcuate portion (62) of each of the auxiliary pipes (6) may be further inserted into the heating cap (31) laterally, thereby constituting a transformation implementation of the second embodiment, wherein: Controlling the depth of the insertion hole (not shown) in which the heating cap (31) is used to insert each of the arc-shaped portions (62) can make the internal space of each of the sub-tubes (6) connect or disconnect.

Claims (3)

A liquid fuel furnace includes a container, a base, a main pipe, an adjusting member, and an adjusting rod, wherein the container is used for containing liquid fuel, an opening is formed at the top end of the container, and the base is provided at the opening. A main pipe shaft is provided on the base, the bottom end of the main pipe extends inside the container, the top end of the main pipe extends in the top space of the base, the main pipe is provided with a heating cap at the top, the adjusting member pivotally covers the main pipe, and the adjusting rod One end is laterally connected to the adjusting member, and is used to control the adjusting member to reciprocately rotate; the main pipe laterally penetrates a plurality of first air outlet holes, and each of the first air outlet holes is respectively formed on the top edge of the base and the heating cap. Between, and each of the first air outlet holes is radially distributed according to the main axis of the main axis, the outer diameter of the heating cap is larger than the outer diameter of the adjusting member, a second air outlet hole is formed at the top of the heating cap, and the second The air outlet communicates with the main pipe. Inside the main pipe, a plurality of inner cores are arranged along the long axis direction of the main pipe. Each of the inner cores is a wire body made of a heat-resistant material. The bottom end of each inner core extends through the bottom end of the main pipe. Inside the container, each inside The top end of the container is adjacent to the bottom edge of each of the first air outlet holes. The inner core of the main pipe forms a plurality of channels with a small width by each of the inner cores. According to this, the liquid fuel inside the container flows to the inner cores along the channels. The adjusting member cooperates with each of the first air outlets to penetrate through a plurality of third air outlets laterally, each of the third air outlets is respectively formed between the top edge of the base and the bottom edge of the heating cap, and each of the third The air outlets are radially distributed according to the axis of the adjusting member as the center, and each of the third air outlets is adjacent to each of the first air outlets; the base is provided with a plurality of auxiliary tubes, and each of the auxiliary tubes is arranged in a row. On the outer periphery of the main pipe; each of the auxiliary pipes is composed of a straight part and an arc part, the straight part is provided on the base, the bottom end of the straight part extends inside the container, and the top of the straight part It is connected with the arc-shaped part, the arc-shaped part is connected with the heating cap, each of the auxiliary tubes forms a fourth air outlet at the top edge of the arc-shaped part, and each of the auxiliary tubes is respectively in the straight-shaped part. A plurality of inner cores are provided along the long axis direction of the straight portion, and each of the inner cores is a heat-resistant material. The bottom end of each inner core extends from the bottom end of the straight portion, the top end of each inner core extends from the top end of the straight portion, and the inner portion of the auxiliary tube is formed by each of the inner cores. According to a plurality of channels with a small width, the liquid fuel inside the container flows to each of the arc-shaped portions along the channel; each of the first air outlet holes is respectively directed to the straight portion of the auxiliary tube. According to the liquid fuel furnace described in item 1 of the scope of the patent application, wherein the base forms a containing chamber on the axis, the base forms a through groove on one side of the containing chamber, and the adjusting member pivots on the containing chamber, One end of the adjusting rod is laterally connected to the adjusting member through the through groove, and the other end of the adjusting rod extends outward from the side of the base. According to the liquid fuel furnace described in the first item of the patent application scope, wherein the heating cap is pivoted with a connecting member, the connecting member is screwed to the main pipe, and the second air outlet hole communicates with the main pipe through the connecting member.