BACKGROUND ART In general, as a burner for cooking used in a Chinese restaurant and the like is needed to have an intense heat power, a high-pressure burner using a fuel such. as high-pressure liquefied petroleum gas (LPG) is being used. Recently, burners having various forms and configurations, which are capable to obtain a high-pressure and intense heat by using a low cost but low-pressure fuel such as liquefied natural gas (LNG), have been developed and used.

As an example of a prior art of the cooking gas burner as described above, there is the utility model registered number 20-0197146 titled Combustion Device of Gas Burner for Cooking", and the model relates to a combustion device that uses a low cost fuel such as city gas, but can obtain an intense heated flame instantly as that of a medium-pressure or high pressure burner.

Fig. 1 is a drawing that shows a combustion device of a gas burner for cooking according to a prior art.

As shown in Fig. 1, the gas burner is comprised of a gas inlet pipe 2 formed on one side of a burner header 1, a burner tip 3 formed on upper surface of the burner header 1, and a conical cap 4 formed on the inside of the burner header 1.

In the gas burner of a prior art thus comprised, the gas flown into the gas inlet pipe 2 is injected from the burner tip 3 formed on the upper surface of the burner header 1 and is burned at the same time, the flames generated from the burning gas rise along the incline of the conical cap 4, and an intense heat power is obtained as the heat power concentrates on upper surface of the burner header 1.

However, in the gas bumer above described, the air supplied to the. primary supplying hole 3a and the gas injected from the burner header 1 is primarily mixed, and this mixed air is mixed with the secondary air through the fuel intake 3b with an appropriate mixture ratio for burning. A gas of about 3 m3/h is supplied to obtain an intense heat power, but there is a problem that the amount of the supplying air for burning the supplied gas is too small to make possible for a complete combustion, and dark-red flames become to heat the receptacle causing a weak heat power as well as an incomplete combustion as much as to make soot on the conical cap 4.

DISCLOSURE OF INVENTION The present invention has been made to solve the problem above mentioned, and an object of the present invention is to provide a device for increasing heat power of a gas burner, capable of improving heat efficiency by making the supplied gas to the gas burner burn completely and maintaining an intense heat power.

To attain the object above mentioned, the present invention comprises a gas inlet pipe formed one side of a burner header, a plurality of burner tips formed on the upper surface, and a conical cap formed fixedly on the inside of the burner header, wherein a heat power increasing means is provided that discharges the air blown by a blowing fan provided on the lower side of the burner header around the burner header, and assist a combustion of the gas injected from the burner tips so that the heat power is increased.

The heat power increasing means comprises at least one stepped differential surface, a cap formed with a plurality of injection holes on the stepped differential surface and the uppermost surface of the heat power increasing means, a primary air storage tank provided on the lower side of the burner header, a discharge port and a plurality of air injection holes for supplying the cap with air formed on the upper side thereof, and an air inlet port for leading the air from the blowing fan formed on the lower side thereof, and a secondary air storage tank having a ring-shape provided on the upper side of the burner header, formed with many air injection holes on the inner circumference surface thereof, and a connection pipe connecting the primary air storage tank and the secondary air storage tank on the one side of heat power increasing means.

The cap is formed in three differential steps.

The air injecting port formed on the secondary air storage tank is bored inclinatory upward.

The secondary air storage tank is formed with many air injecting bodies on the upper side, and aid-combustion air leading injecting bodies on the lower side, thereof.

The air injecting bodies is formed inclinatory toward the center of the ring of the secondary air storage tank.

BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is a sectional view showing an example of a combustion device of a gas burner according to a prior art.

Fig. 2 is a sectional view showing an overall configuration according to the present invention.

Fig. 3 is an explosive perspective view showing main parts according to the present invention.

Fig. 4 is an enlarged sectional view showing a region of a nozzle tip according to the present invention.

Fig. 5 is an enlarged sectional view showing a region of a cap according to the present invention.

Fig. 6 is an enlarged sectional view showing a region of a primary air storage tank according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the preferred embodiments shown in the attached drawings.

Fig. 2 and Fig. 3 show a device for increasing heat power of a gas burner according to the present invention.

As shown in Fig. 2 and Fig. 3, a device for increasing heat power of a gas burner 100 is mainly comprised of a burner header 10, a blowing means located on the lower side of the burner header 10, and a heat power increasing means 30 for discharging the air blown

by the blowing means 20 around the burner header 10.

The burner header 10 having a ring-shape, includes a gas inlet pipe 11 connected on one side, a cap fixing part 12 formed within, and a burner tip 13 provided radially on the outer circumference turning toward the cap 31.

Fig. 4 is a sectional view showing a region of a nozzle tip.

As shown in Fig. 4, the burner tip 13 is formed with a nozzle hole 13b on the side to be fixed to the burner header 10, a plurality of air supplying holes 13a on the outer circumference, and a fuel intake 13c on the other side, wherein the burner tip 13 makes the supplied gas into a mixed gas.

The burner header 10 is preferably shaped to have 14 angles, and on the upper side of the burner header 10, a cap 31 is provided.

The blowing means 20 supply the air into the spacing part of the cap 31, and includes a driving motor 21, a blowing fan 22 coupled to the driving motor 21, and a passage pipe 23 for guiding the air blown by the blowing fan 22.

The passage pipe 23 is preferably a flexible pipe-shaped.

The heat power increasing means 30 includes a cap 31 to be fixed on the upper side of the burner header 10, a primary air storage tank 32 provided on the lower side of the burner header 10, a secondary air storage tank 33 provided on the upper side of the burner header 10, and a connection pipe 34 connecting the respective one side of the primary air storage tank 32 and the secondary air storage tank 33.

Fig. 5 is a sectional view showing a region of a cap according the present invention.

As shown in Fig. 5, the cap 31 is formed with a spacing part within, at least one stepped differential surface 31b, and a plurality of air injection holes 31d in the stepped differential surface (s) 31b and the uppermost surface 31c, wherein the cap 31 makes the flames dispersed from the burner tip 13 collide against the outer circumference of the cap 31 and flare up.

The cap 31 is preferably shaped to have 14 angles, and the stepped differential surface 31b is most preferably formed in three differential steps.

The primary air storage tank 32 is formed with an air discharging port 32a and many air injection holes 32b which supply the air to the cap 31 located on the upper side, and an

air inlet port 32c on the lower side which leads the air blown by the blowing fan 22, wherein the primary air storage tank 32 supplies the air blown by the blowing means 20 to the lower side of the burner header 10, and guides the air to the cap 31 at the same time.

Fig. 6 is a sectional view showing a secondary air storage tank according to the present invention.

As shown in Fig. 6, the secondary air storage tank 33 having a ring-shape is formed with many air injection holes 33a.

The air injection holes 33a is most preferably bored inclinatory by about 45°.

Also, many air injecting bodies 33b are formed on the upper side, and aid-combustion air leading injecting bodies 33c on the lower side, of the secondary air storage tank 33.

The air injecting bodies 33b are pipe-shaped, and formed inclinatory toward the center of the ring-shaped secondary air storage tank 33 radially.

That is, by forming the air injecting bodies 33b inclinatory upward by about 45°, the flames injected from the burner tip 13 heat the pot 40 as well as induce a complete combustion as the flames are flaring up. The aid-combustion air leading injecting bodies 32c discharge the air to the center part of the secondary air storage tank 32 so as to supply the additional air for making the complete combustion of the gas possible.

The connection pipe 34 connects the respective one side of the primary air storage tank 32 and the secondary air storage tank 33.

The reference numeral 40 represents a pot.

Next, the operation of the present invention will be described in detail.

When a piping of city gas is connected to the gas inlet pipe 11 and the valve is opened, the gas flows into the burner header 10 and discharges outside through the nozzle hole 13b of the burner tip 13.

During this process, the primary air from the primary supplying holes 13a of the burner tip 13 is made to the mixed gas within the burner tip 13, and the mixed gas is injected through the fuel intake 13c, then supplied with the secondary air, and becomes the mixed gas state which is easy to be ignited.

In this state, when ignition is made with a match or a lighter, a continuous combustion becomes possible with the continuously supplying gas and air.

The gas thus burned collides against the outer circumference of the cap 31, goes toward the air injecting bodies 33b and the aid-combustion air leading injecting bodies 33c.

During this process, the air induced by rotating the blowing fan 22 connected to the driving motor 21 is flown into the air inlet port 32c of the primary air storage tank 32, a part of the in-flown air is discharged upward to the air injection holes 32b and to the air discharging port 32a, and the air is discharged downward to the cap 31 and to the burner header 10, thus increasing a heat power.

The air supplied to the cap 31 is dispersed to the injection holes 31d bored between the stepped differential surface 31b and the uppermost surface 31c, making the incomplete combustion gas burn completely, thus maintaining an intense heat power.

That is, with the air injected to the air injection holes 31d, the pressure lowers, and as the gas gathers around the air injection holes 31d, the incomplete combustion gas burns completely.

Also, through the connection pipe 34, the remaining gas flown into the primary air storage tank 32 is supplied to the secondary air storage tank 33 formed on the upper side.

As the air supplied to the secondary air storage tank 33 disperses through the air injection holes 33a, the air injecting bodies 33b, and the aid-combustion air leading injecting bodies 33c, the incomplete combustion gas burn completely, thus maintaining an intense heat power. As the primary and secondary air mix through the air injecting bodies 33b and the aid-combustion air leading injecting bodies 33c, and the mixed air disperses into the flames, the incomplete combustion gas burns completely. At this time, a pillar of blue fire like that of oxyacetylene welding shoots up two or three times, thus obtaining an intense heat power.

As the intense heat power above mentioned heats the pot 40 directly from the air injecting bodies 33b at a minimum distance, the boiling time of water can be shortened 25-35% as much as the same amount of water is boiled by a burner provided with nozzles of the same specification, thus saving the consumption of gas, while increasing the heat power as much as the above shortened time rate. The increased heat power can be obtained by supplying the air in proporOtion to the supplying amount of the gas (about 3 m3/h).

INDUSTRIAL APPLICABILITY As described above, in the combustion device of the gas burner of the present invention, as the air is supplied to the heat power increasing means provided near the burner header by the blowing fan, and makes the incomplete combustion gas which used to be discharged to the atmosphere burn completely, the heat efficiency can be improved.

Also, an intense heat power can be maintained by the continuous blowing of the air.