JP4680943B2 - Internal flame burner - Google Patents

Description

  The present invention relates to an internal flame burner in which a mixed gas of fuel gas and primary air mixed in a mixing section is sent to an annular distribution section, and a flame is formed inward by a flame hole opened in the inner periphery of the distribution section.

  Conventionally, a mixing portion for sucking fuel gas together with primary air is formed at one end and extending, an annular distribution portion connected to the other end of the mixing portion, and formed along the inner periphery of the distribution portion An internal flame type burner having a flame hole that is opened inward is known. And this kind of internal flame type burner arranges the upper current plate and the lower current plate for the secondary air on the upper side and the lower side of the distribution part, respectively, in the jet part of the air-fuel mixture from the flame hole Secondary air is supplied through a gap between each rectifying plate and the burner body (see, for example, Patent Document 1).

By the way, in the internal flame type burner, since the flame approaches the central portion, the burner itself is also easily heated. As a result, the pressure inside the burner increases and the amount of primary air sucked from the inlet of the mixing portion becomes insufficient. May cause poor combustion. Moreover, the life of the burner is shortened due to the high temperature of the burner.
JP 2003-279008 A

  The present invention eliminates this inconvenience, and the present invention is a highly durable internal flame burner that can suppress an increase in pressure inside the burner to obtain a good combustion state and can maintain a good combustion state over a long period of time. The purpose is to provide.

  In order to achieve such an object, the present invention provides a hollow mixing portion that is formed with a suction port for sucking fuel gas together with primary air formed at one end and extends, and a hollow annular distribution connected to the other end of the mixing portion. And an internal flame type burner that is formed along the inner periphery of the distribution portion and opens inward, and is integrally extended with the mixing portion along the mixing portion, and is cooled inside. A mixing section cooling pipe that cools the mixing section by circulating air and an end of the mixing section cooling pipe on the distribution section side are provided in an annular shape along with the distribution section. A distribution section cooling pipe that cools the distribution section by circulating cooling air therein, and forcibly supplying cooling air to one end of the mixing section cooling pipe located on the inlet side of the mixing section A connecting portion for connecting the cooling air supply means is provided, A secondary air supply port is provided that is formed along the inner periphery of the cloth portion cooling pipe and opens inward, and supplies cooling air inside the distribution portion cooling pipe as secondary air along the flame hole. It is characterized by.

  According to the present invention, the cooling air from the cooling air supply means is forcibly sent to the mixing section cooling pipe and the distribution section cooling pipe via the connection section of the mixing section cooling pipe. Can be reliably cooled. Thereby, not only the temperature rise of the distribution part located in the vicinity of the flame hole can be suppressed, but also the temperature rise of the mixing part due to heat transmitted from the distribution part can be suppressed. And since the temperature rise of a mixing part and a distribution part is suppressed, the internal pressure increase by the heat from a mixing part to a distribution part can be controlled reliably, a sufficient amount of primary air is taken in, and a good combustion state is obtained. Obtainable.

  Moreover, since the air which cooled the mixing part and the distribution part is supplied to a flame hole as secondary air from a secondary air supply port, a favorable combustion state can be obtained using cooling air effectively. In addition, since the temperature of the air that has cooled the mixing part and the distribution part is moderately increased, the combustion rate of the gas ejected from the flame hole when it is supplied as secondary air to the flame hole increases, resulting in good combustion. The state can be obtained.

  Furthermore, since the mixing section cooling pipe is integrally provided in the mixing section and the distribution section cooling pipe is integrally provided in the distribution section, the cooling of the mixing section and the distribution section by cooling air is efficiently performed without waste. The internal flame burner can be configured compactly. And since the cooling efficiency is high, the durability of the burner can be improved and a good combustion state can be maintained over a long period of time.

  Further, in the present invention, an annular in-tube rectifying plate standing along the secondary air supply port is provided inside the distribution section cooling pipe, and the in-pipe rectification plate is provided inside the distribution section cooling pipe. And a plurality of communication holes for communicating with the secondary air supply port, the cooling air flowing from the other end of the mixing unit cooling pipe is guided to the entire circumference of the distribution section cooling pipe, and the cooling air is It is preferable to send it out to the secondary air supply port. The rectifying plate in the pipe is inside the distribution section cooling pipe, and guides the cooling air to the entire circumference of the distribution section cooling pipe, so that the distribution section is uniformly cooled over the entire circumference and increases the pressure inside the distribution section. It can suppress more reliably.

  Moreover, as an aspect in this invention, it is preferable to provide a pair of the mixing section cooling pipe and the distribution section cooling pipe on the upper side and the lower side of the mixing section and the distribution section. Thereby, the internal flame type burner can be cooled from both the upper and lower sides, and the cooling efficiency can be increased and the configuration can be made compact.

  An embodiment of the present invention will be described with reference to the drawings. Referring to FIG. 1, reference numeral 1 denotes an internal flame type burner according to the present embodiment, 2 denotes a burner body of the internal flame type burner 1, 3 denotes an upper cooling pipe body integrally attached to the upper side of the burner body 2, Reference numeral 4 denotes a lower cooling tube body integrally attached to the lower side of the burner body 2. The burner body 2 is formed by stacking two press-formed upper and lower plates. As shown in FIG. 2, the burner body 2 has a hollow annular distribution portion 5 and a tangential outward from one location around the distribution portion 5. And a flame hole 7 formed on the inner periphery of the distribution portion 5 and opening inward, as shown in FIG. In addition, as shown in FIG. 2, the mixing unit 6 has a gas nozzle (not shown) at one end thereof, and a suction port 8 for sucking primary air together with the fuel gas is formed in the vicinity of the suction port 8. The throat portion 9 is formed in a funnel shape and has a diameter smaller than that of the suction port 8. The other end of the mixing unit 6 communicates with the distribution unit 5 and is integrally connected. The fuel gas sucked from the suction port 8 and the primary air flow while being reliably mixed through the throat portion 9, whereby a mixed gas for combustion is generated in the mixing portion 6. This mixed gas flows from the mixing section 6 into the distribution section 5 and is ejected from the flame hole 7, and forms a flame inward along the inner periphery of the distribution section 5 to be burned.

  As shown in FIG. 1, the upper cooling pipe body 3 includes a first mixing section cooling pipe 10 that extends linearly and an annular first distribution section cooling pipe 11.

  The first mixing unit cooling pipe 10 extends along the upper side of the mixing unit 6, and is provided integrally with the mixing unit 6 with the upper side surface of the mixing unit 6 as a part of the inner peripheral wall (lower side wall). As shown in FIG. 4, one end of the first mixing unit cooling pipe 10 (that is, the end located on the suction port 8 side of the mixing unit 6) is blocked by the blocking wall 12 and penetrates the blocking wall 12. In addition, a connection tube 13 (connection portion) that is connected to a cooling air supply means (not shown) (for example, an air supply path such as an intake fan) is provided. The cooling air supply means forcibly feeds the cooling air into the first mixing unit cooling pipe 10 via the connection tube 13. At this time, one end of the first mixing section cooling pipe 10 is closed by the blocking wall 12, and the cooling air sent from the cooling air supply means is supplied into the first mixing section cooling pipe 10 by the connection tube 13. The amount of primary air supplied from the suction port 8 of the mixing unit 6 can be changed and cooling air can be supplied into the first mixing unit cooling pipe 10 without adversely affecting the combustion state. Moreover, since a part of inner peripheral wall of the 1st mixing part cooling pipe 10 is comprised by the upper surface of the mixing part 6, the cooling air sent to the inside of the 1st mixing part cooling pipe 10 is directly mixed with the mixing part 6. Cools efficiently by contacting the upper side of the plate.

  The first distribution part cooling pipe 11 is formed in an annular shape along the upper side of the distribution part 5, and is provided integrally with the distribution part 5 with the upper side surface of the distribution part 5 as a part of the inner peripheral wall (lower side wall). Yes. The other end of the first mixing section cooling pipe 10 communicates with a part of the first distribution section cooling pipe 11 so as to be integrated therewith.

  As shown in FIGS. 1 and 3, a first secondary air supply port 14 that opens inward along the inner circumference of the first distribution section cooling pipe 11 is formed. As shown in FIG. 3, a first in-tube rectifying plate 15 is provided inside the first distribution section cooling pipe 11.

  As shown in FIG. 5, the first in-pipe rectifying plate 15 is formed in an annular shape by a strip-shaped metal plate. And the 1st distribution part cooling pipe 11 is welded to the upper surface of the distribution part 5 via the welding piece 16 formed in multiple numbers along the lower edge, as shown in FIG. Is erected so as to divide the interior into two chambers. As shown in FIG. 5, a plurality of communication holes 17 are formed in the first in-pipe rectifying plate 15. As shown in FIG. 3, the communication hole 17 allows the inside of the first distribution part cooling pipe 11 to communicate with the first secondary air supply port 14, and allows cooling air flowing along the first distribution part cooling pipe 11 to flow. The air is sent to the first secondary air supply port 14.

  The cooling air sent from the first mixing section cooling pipe 10 to the first distribution section cooling pipe 11 is earlier than the first mixing section cooling pipe by the first in-pipe rectifying plate 15 toward the first secondary air supply port 14. The distribution part 5 is uniformly cooled over the entire circumference by the cooling air. At this time, since a part of the inner peripheral wall of the first distribution section cooling pipe 11 is constituted by the upper side surface of the distribution section 5, the cooling air sent into the first distribution section cooling pipe 11 is directly distributed to the distribution section. 5 is brought into contact with the upper side surface and cooled efficiently.

  And the cooling air sent to the perimeter of the 1st distribution part cooling pipe 11 is sent out to the 1st secondary air supply port 14 from the communicating hole 17 of the 1st in-tube baffle plate 15, and cooling air is made into secondary air. Used for combustion in the flame hole 7. At this time, since the supply amount of the secondary air is appropriately adjusted by the communication hole 17, the flame in the flame hole 7 can be formed satisfactorily. Moreover, the cooling air sent to the first secondary air supply port 14 as the secondary air is appropriately increased in temperature when the mixing unit 6 and the distribution unit 5 are cooled. The combustion rate increases, and a good combustion state can be obtained.

  Further, the lower cooling pipe 4 has the same configuration as the upper cooling pipe 3 described above. As shown in FIG. 1, the second mixing section cooling pipe 18 extending linearly and the annular second distribution section cooling are provided. The tube 19 is constituted.

  The second mixing unit cooling pipe 18 extends along the lower side of the mixing unit 6 and is provided integrally with the mixing unit 6 with the lower side surface of the mixing unit 6 as a part of the inner peripheral wall (upper side wall). As shown in FIG. 4, the end of the second mixing unit cooling pipe 18 located on the suction port 8 side of the mixing unit 6 is closed by a blocking wall 20. The blocking wall 20 is provided with a connecting tube 21 (connecting portion) therethrough. The connection tube 21 is connected to a cooling air supply means (not shown) in the same manner as the first mixing unit cooling pipe 10 described above. Then, the closing wall 20 closes one end of the second mixing unit cooling pipe 18 and supplies cooling air to the inside of the second mixing unit cooling pipe 18 through the connection tube 21. It is possible to prevent an adverse effect on the amount of primary air supplied from the suction port 8. Moreover, since a part of inner peripheral wall of the 2nd mixing part cooling pipe 18 is comprised by the lower surface of the mixing part 6, cooling air and the mixing part 6 contact the lower surface of the mixing part 6 directly, and it is efficient. To be cooled.

  The second distribution part cooling pipe 19 is formed in an annular shape along the lower side of the distribution part 5, and is provided integrally with the distribution part 5 with the upper side surface of the distribution part 5 as a part of the inner peripheral wall (upper side wall). ing. The other end of the second mixing section cooling pipe 18 communicates with a part of the second distribution section cooling pipe 19.

  As shown in FIGS. 1 and 3, a second secondary air supply port 22 that opens inward is formed on the inner periphery of the second distribution section cooling pipe 19. As shown in FIG. 3, a second in-tube rectifying plate 23 is provided inside the second distribution section cooling pipe 19.

  As shown in FIG. 5, the second in-pipe rectifying plate 23 is formed in an annular shape from a strip-shaped metal plate, like the first in-pipe rectifying plate 15. As shown in FIG. 3, the second in-tube rectifying plate 23 is provided upright on the lower side wall of the second distribution section cooling pipe 19 so as to divide the inside of the second distribution section cooling pipe 19 into two chambers. Yes. In practice, the second in-pipe rectifying plate 23 is welded and fixed to the lower surface of the distribution portion 5 by a plurality of welding pieces 24 (see FIG. 5) provided along the upper edge thereof. Further, as shown in FIGS. 5 and 3, the second in-pipe rectifying plate 23 has a plurality of communication holes for sending cooling air flowing along the second distribution portion cooling pipe 19 to the second secondary air supply port 22. 25 is formed.

  The cooling air sent from the second mixing section cooling pipe 18 to the second distribution section cooling pipe 19 is faster than the second mixing section cooling pipe by the second in-pipe rectifying plate 23 toward the second secondary air supply port 22. It is guided and flows over the entire circumference of the 18th. Thereby, the distribution part 5 is uniformly cooled by the cooling air over the entire circumference. At this time, since a part of the inner peripheral wall of the second distribution part cooling pipe 19 is constituted by the lower surface of the distribution part 5, the cooling air sent into the second distribution part cooling pipe 19 is distributed to the distribution part 5 It cools efficiently by directly touching the lower surface.

  And the cooling air sent to the perimeter of the 2nd distribution part cooling pipe 19 is sent out to the 2nd secondary air supply port 22 from the communicating hole 25 of the 2nd in-tube baffle plate 23, and cooling air is made into secondary air. Used for combustion in the flame hole 7. At this time, the supply amount of the secondary air is moderately adjusted by the communication hole 25, and further, the temperature of the cooling air that has cooled the mixing unit 6 and the distribution unit 5 is moderately increased, so that a good combustion state is obtained. Can do.

  As described above, according to the internal flame burner 1 of the present embodiment, the burner body 2 can be efficiently cooled, so that the configuration becomes compact and the durability of the burner body 2 is improved. For example, although not shown, when the internal flame burner 1 of the present embodiment is used for a gas stove, a temperature rise inside the stove can be suppressed, and heat to a control device or the like mounted inside the stove can be suppressed. Can be prevented. Moreover, since the distance between the internal flame type burner 1 and the pan can be shortened, the thermal efficiency at the time of cooking can be improved, and the degree of freedom of design such as Gotoku is improved. The stove top can be flattened.

  In the present embodiment, the upper cooling tube body 3 and the lower cooling tube body 4 have the same configuration, and the lower cooling tube body 4 is cooled more than the upper cooling tube body 3 as shown in FIG. Although the air flow cross-sectional area is shown to be slightly larger, the ratio of the flow cross-sectional area of both is appropriately set according to the good distribution of the secondary air supplied from above and below the flame hole 7. Needless to say, it is something.

  In the present embodiment, the upper cooling pipe 3 is provided on the upper side of the internal flame burner 1 and the lower cooling pipe 4 is provided on the lower side. If the secondary air can be sufficiently supplied, only one of the upper cooling tube 3 and the lower cooling tube 4 may be provided.

  Further, in the present embodiment, the internal flame type burner 1 that performs combustion with fuel gas has been described. However, the internal flame type burner of the present invention may supply liquid fuel by gasification.

The perspective view which shows the internal flame type gas burner of one Embodiment of this invention. An explanatory side view showing a burner body. III-III sectional view explanatory drawing of FIG. IV-IV sectional explanatory drawing of FIG. An explanatory perspective view showing a shape of an in-pipe current plate.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Internal flame type burner, 5 ... Distribution part, 6 ... Mixing part, 7 ... Flame hole, 8 ... Inlet, 10 ... 1st mixing part cooling pipe (mixing part cooling pipe), 11 ... 1st distribution part cooling pipe (Distribution part cooling pipe), 13, 21 ... connection tube (connection part), 14 ... first secondary air supply port (secondary air supply port), 15 ... first in-pipe rectification plate (in-pipe rectification plate), 17, 25 ... communication hole, 18 ... second mixing section cooling pipe (mixing section cooling pipe), 19 ... second distribution section cooling pipe (distribution section cooling pipe), 22 ... second secondary air supply port (secondary air supply port) ), 23... Second in-pipe rectifying plate (in-pipe rectifying plate).

Claims (3)

A hollow mixing portion that is formed at one end and extends to suck in fuel gas together with primary air, a hollow annular distribution portion that is connected to the other end of the mixing portion, and an inner circumference of the distribution portion In an internal flame type burner having a flame hole formed and opened inwardly,
A mixing section cooling pipe that extends integrally with the mixing section along the mixing section and cools the mixing section by circulating cooling air therein, and an end of the mixing section cooling pipe on the distribution section side A distribution portion cooling pipe that is provided in a ring shape integrally with the distribution portion along the distribution portion and cools the distribution portion by circulating cooling air therein;
One end located on the inlet side of the mixing section in the mixing section cooling pipe is provided with a connection section for connecting a cooling air supply means for forcibly supplying cooling air,
A secondary air supply port that is formed along the inner periphery of the distribution section cooling pipe and that opens inward and that supplies cooling air inside the distribution section cooling pipe as secondary air along the flame hole is provided. An internal flame burner characterized in that Inside the distribution part cooling pipe, an annular in-pipe rectifying plate is provided that stands along the secondary air supply port,
The in-pipe flow straightening plate includes a plurality of communication holes for communicating the inside of the distribution section cooling pipe with the secondary air supply port, and cools the cooling air flowing in from the other end of the mixing section cooling pipe to the distribution section cooling 2. The internal flame burner according to claim 1, wherein the cooling air is sent out to the secondary air supply port while being guided around the entire circumference of the pipe.   The internal flame burner according to claim 1 or 2, wherein a pair of the mixing section cooling pipe and the distribution section cooling pipe is provided on the upper side and the lower side of the mixing section and the distribution section.

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