JPH0894026A - Heat storaging gas burner - Google Patents

Abstract

PURPOSE: To eliminate the external piping for switching a passage and reduce the installation space and the cost by providing a compact switching vale in one heat storage gas burner to switch an air supply passage and an exhaust passage. CONSTITUTION: First, secondary air supplied from an air supply port is passed through a first heat storage unit 21, passed through a first passage 11, and burnt together with the gas of already burning state and primary gas. Exhaust gas is sucked from holes of a second group under the negative pressure control of an air supply port 35 from an exhaust port 36, retained heat is stored in a second heat storage unit 22 when it is passed through the unit 22, and exhausted. Then, when a switching valve 24 is driven to be switched, the secondary air is injected, burnt, while the exhaust gas is sucked from the holes of a first group, and its heat is stored in the unit 21. Thereafter, the heat of the unit 21 preheats the secondary air and the heat of the unit 22 preheats the secondary air, and hence the thermal efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type gas burner.

[0002]

2. Description of the Related Art A conventional heat storage type gas burner is provided with two gas burners (provisionally A and B) each having a heat storage chamber, and one gas burner A is a secondary air from the outside. Is supplied to the heat storage chamber of the gas burner B in the combustion stopped state, exhaust heat of the gas burner A is stored and then exhausted, and the gas burner B is discharged from the outside. When it is in the combustion state by receiving the supply of the next air, a cycle in which the exhaust heat of the gas burner B is stored in the heat storage chamber of the gas burner A in the combustion stopped state and then exhausted is alternately performed. Has been done. In the process of repeating such a cycle, when the secondary air supplied from the outside to the gas burner passes through the heat storage chamber, the heat stored in the heat storage chamber preheats the secondary air.

[0003]

However, the above conventional heat storage type gas burner requires two gas burners, and the piping route for switching between the air supply passage and the exhaust passage is complicated and therefore, the installation is required. The exclusive space of time becomes large,
And there is a problem that it becomes expensive. Therefore, in the present invention,
It is a technical problem to be solved to provide a compact and inexpensive heat storage type gas burner.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a heat storage type gas burner is provided with an outer peripheral portion of a nozzle portion in which gas and primary air supplied from the outside are mixed and burned at a tip portion. The role of replenishing the secondary air supplied from the outside to the air supply port to the combustion part at the tip of the nozzle, and the intake of the above gas, the temporary air, and the exhaust gas from which the secondary air was burned, and the external air from the exhaust port. First with the role of discharging to the first
Drill holes in the group and holes in the second group,
A first passage communicating with the hole of the first group and a second passage communicating with the hole of the second group are formed, and a first heat storage body is arranged at an end of the first passage. , A second heat storage body is disposed at an end of the second passage, and further has an air supply valve chamber communicating with the air supply port and an exhaust valve chamber communicating with the exhaust port, and the air supply valve chamber is provided in the air supply valve chamber. An air supply valve body that switches secondary air from the air supply port to pass through the first heat storage body or the second heat storage body is provided, while exhaust gas exhausted from the exhaust port is provided in the exhaust valve chamber. An exhaust valve body for switching the passing first heat storage body or the second heat storage body is provided, and a switching valve for synchronously switching and driving the air supply valve body and the exhaust valve body is provided. Further, a partition wall is formed at the boundary between the holes of the first group and the holes of the second group so that the supplied secondary air is not discharged to the outside together with the exhaust gas before being burned. You can

[0005]

According to the heat storage type gas burner having the above structure, when the air supply valve body and the exhaust valve body of the switching valve are driven to one switching position in the first cycle, the two gas supplied from the air supply port are supplied. Subsequent air passes through the first heat storage body, passes through the first passage, is jetted from the holes of the first group, and is burned together with the gas and the temporary air which are already in a burning state. When the exhaust port is controlled to have a negative pressure than that of the air supply port, the exhaust gas after combustion is sucked from the hole of the second group and passes through the second heat storage body through the second passage. The heat of the exhaust gas is stored in the second heat storage body and then exhausted to the outside through the exhaust port. After the first cycle is continued for, for example, 30 seconds, when the air supply valve body and the exhaust valve body of the switching valve are switched to the other position, the secondary air supplied from the air supply port is changed to the second position.
While passing through the heat storage body and passing through the second passage and being ejected from the holes of the second group to be burned, the exhaust gas after combustion is sucked from the holes of the first group and passed through the first passage. When passing through the first heat storage body, the heat of the exhaust gas is stored in the first heat storage body and then exhausted to the outside from the exhaust port.
Then, in the next cycle, the heat stored in the first heat storage body preheats the secondary air, and in the next cycle, the second
Since the heat stored in the heat storage body preheats the secondary air, the thermal efficiency can be improved. When a partition wall is provided at the boundary between the holes of the first group and the holes of the second group,
It is possible to prevent the supplied secondary air from being discharged outside together with the exhaust gas before being burned.

[0006]

Next, an embodiment of the present invention will be described. 1 is a front view of the heat storage type gas burner 1, FIG. 2 is a side sectional view of the heat storage type gas burner 1, and FIG. 3 is a heat storage type gas burner 1.
FIG. 4 is a sectional view taken along the line AA of FIG. 2, FIG. 5 is a sectional view taken along the line BB of FIG. 2, and FIG.
FIG. 6 is a cross-sectional view taken along arrow C. Hereinafter, the configuration of the heat storage type gas burner 1 will be described with reference to FIGS. 1 to 6.

The burner main body 2 of the heat storage type gas burner 1 is formed in a cylindrical shape, and a pipe-shaped gas nozzle 3 is horizontally arranged in the central portion of the burner main body 2. The tip of the gas nozzle 3 is open, and the base of the gas nozzle 3 is in communication with the gas supply port 4. A primary air passage 5 serving as a passage for primary air is formed coaxially with the gas nozzle 3 at the outer peripheral portion of the tip of the gas nozzle 3, and a primary air supply port 6 is provided at the base end of the primary air passage 5. The air supplied from the primary air supply port 6 is ejected from the tip opening 5A of the primary air passage 5 so as to be mixed with the gas ejected from the tip of the gas nozzle 3.

Further, as shown in FIG. 2, on the outer peripheral surface of the tip of the gas nozzle 3, the swirl vanes 7 are arranged so that the primary air passing through the primary air passage 5 is uniformly mixed with the gas ejected from the tip of the gas nozzle 3. Is attached.

Secondary air is allowed to pass through the outer peripheral portion of the primary air passage 5, while exhaust gas after the secondary air is combusted together with the gas already combusted at the tip of the gas nozzle 3 and the primary air is exhausted. The 1st passage 11 and the 2nd passage 12 which let it pass are formed. The first passage communicating with the first passage 11 is provided on the outer peripheral portion of the front end opening portion 5A of the primary air passage.
Holes 11A (three holes) in the group and holes 12A (three holes) in the second group communicating with the second passage 12 are opened. A partition wall WL is provided at each boundary between the hole 11A of the first group and the hole 12A of the second group, and before the secondary air injected from each hole is burned. It is designed not to be sucked into the holes of other groups together with the exhaust gas.

The first passage 1 formed in the burner body 2
1 is communicated with a first chamber 14 of a circular base body 2A integrally connected to the burner body 2 with a packing 13 interposed therebetween, and further, from a square hole 15 opened in the base body 2A to the base body 2A.
Is communicated with the outside of.

On the other hand, the second body formed on the burner body 2
The passage 12 communicates with the second chamber 16 of the circular base body 2A integrally connected to the burner body 2 with the packing 13 interposed therebetween, and further from the square hole 17 opened in the base body 2A to the base body 2A. Is communicated with the outside of.

A first heat storage body 21 is provided outside the square hole 15.
However, the second heat storage body 22 is stored in the heat storage body storage case 23 outside the square hole 17. The first heat storage body 21 and the second heat storage body 22 are made of alumina balls, ceramic honeycomb bodies, or the like, and the exhaust gas described above is used for the square holes 1
When passing through 5 and 17, and passing through the first heat storage body 21 and the second heat storage body 22, the heat held by the exhaust gas is stored.

A switching valve 24 driven by a cylinder 24A is attached to the lower portion of the heat storage case 23. The switching valve 24 attached to the bracket BK is
As shown in FIG. 6, in the drawing, an air supply valve chamber 25 is provided in the upper part and an exhaust valve chamber 26 is provided in the lower part. And
The air supply valve chamber 25 is provided with a plate-shaped air supply valve body 25A slidable along the lower surface of the heat storage body housing case 23, and the exhaust valve chamber 26 is provided with a plate-shaped exhaust valve body 26A. It is provided slidably along the lower surface of the heat storage case 23.

As shown in FIG. 6, 1 is provided in the air supply valve body 25A.
The individual round holes 25B are formed, and the exhaust valve body 26A is formed with two round holes 26B and 26C. Since the air supply valve body 25A and the exhaust valve body 26A are slid synchronously by the cylinder 24A, the air supply valve body 25A and the exhaust valve body 26A are connected to a connecting member 24C having a U-shaped cross section, which is connected to the cylinder rod 24B of the cylinder 24A. On the other hand, four holes 31, 32, 33, 34 are formed in the lower surface of the heat storage body housing case 23 on which the air supply valve body 25A and the exhaust valve body 26A slide. This hole 31 communicates with the first heat storage body 21,
The hole 32 communicates with the second heat storage body 22. Also, hole 3
3 is in communication with the first heat storage body 21, and the hole 34 is in communication with the second heat storage body 22.

The air supply valve chamber 25 of the switching valve 24 is communicated with an air supply port 35 for supplying secondary air from the outside, and the exhaust valve chamber 26 discharges the above-mentioned exhaust gas to the outside. It communicates with the exhaust port 36.

When the intake valve body 25A and the exhaust valve body 26A are slid to the switching position shown in FIG. 6 by the cylinder 24A, that is, the intake valve body 25A and the exhaust valve body 26A are on the left side in the drawing of FIG. 25A of the air supply valve when it is located at
The circular hole 25B is a hole 31 on the lower surface of the heat storage case 23.
In addition, the round hole 26C of the exhaust valve body 26A coincides with the hole 34 on the lower surface of the heat storage body housing case 23. Therefore, the holes 32 and 33 on the lower surface of the heat storage case 23 are closed. On the other hand, the air supply valve body 25A and the exhaust valve body 26
When A is slid to the right in the drawing of FIG. 6 by the cylinder 24A, the round hole 25B of the air supply valve body 25A coincides with the hole 32 on the lower surface of the heat storage body housing case 23 and the exhaust valve The round hole 26B of the body 26A has a heat storage body storage case 2
3 corresponds to the hole 33 on the lower surface. Therefore, the regenerator storage case
The holes 31 and 34 on the lower surface of the space 23 are closed.

Next, the operation of the heat storage type gas burner 1 will be described. When the primary air supplied from the primary air supply port 6 passes through the primary air passage 5 and is ejected from the tip opening 5A, it is mixed with the gas ejected from the tip of the gas nozzle 3 and burned. When the air supply valve body 25A and the exhaust valve body 26A of the switching valve 24 are slid to the position shown in FIG. 6 by the cylinder 24A, the round hole 25B of the air supply valve body 25A becomes
The round hole 26C of the exhaust valve body 26A coincides with the hole 34 on the lower surface of the heat storage body housing case 23 while matching with the hole 31 on the lower surface of the heat storage body housing case 23. Therefore, the secondary air supplied from the air supply port 35 is the round hole 25B of the air supply valve body 25A.
After passing through the hole 31 and the first heat storage body 21, the square hole 15 enters the first passage 11, and the first passage 11 communicates with the first passage 11A (three) to the gas nozzle. The gas and the temporary air are jetted out to the tip of No. 3 and are supplied to the combustion unit where the gas and the temporary air are already burned, and are burned together.

On the other hand, since the exhaust port 36 is controlled to have a negative pressure from the air supply port 35, it is supplied to the combustion section of gas and primary air through the hole 12A of the second group communicating with the exhaust port 36. The exhaust gas after the burned secondary air is burned is inhaled. Then, the exhaust gas passes through the second passage 12, the square hole 17,
Second heat storage body 22, hole 34, round hole 26C of exhaust valve body 26A
The heat of the exhaust gas is stored in the second heat storage body 22 in the process of passing through and passing through the exhaust port 36.

After the above cycle has continued for 30 seconds, the cylinder 24A is driven by a control circuit (not shown), and the air supply valve body 25A and the exhaust valve body 26A of the switching valve 24 are driven.
Is slid to the right in the drawing of FIG. as a result,
The round hole 25B of the air supply valve body 25A has a heat storage body housing case 23.
The circular hole 26B of the exhaust valve body 26A coincides with the hole 32 on the lower surface of the heat storage body housing case 23, while the circular hole 26B of the exhaust valve body 26A coincides with the hole 32 on the lower surface. Therefore, the secondary air supplied from the air supply port 35 passes through the round hole 25B and the hole 32 of the air supply valve body 25A, the second heat storage body 22, and then the second through the square hole 17 described above.
The gas enters the passage 12, is ejected from the hole 12A of the second group communicating with the second passage 12 to the tip of the gas nozzle 3, and is burned. At this time, since the secondary air is preheated by the heat stored in the previous cycle in the process of passing through the second heat storage body 22, the secondary air is heated in the second group of the second group. Since the gas is ejected from the hole 12A to the tip of the gas nozzle 3, the thermal efficiency is increased.

The exhaust gas after the secondary air heated as described above is jetted from the hole 12A of the second group to the tip of the gas nozzle 3 and burned is the hole 1 of the first group.
1A, and is discharged from the exhaust port 36 through the first passage 11, the square hole 15, the first heat storage body 21, the hole 33 on the lower surface of the heat storage body storage case 23, the round hole 26B of the exhaust valve body 26A. It In this process, the heat retained by the exhaust gas is the first heat storage body 21.
In the next cycle, the heat stored in the first heat storage body 21 raises the temperature of the secondary air.

As described above, this heat storage type gas burner 1
In each cycle, the secondary air is jetted to the tip of the gas nozzle 3 while being heated by the heat storage of the first heat storage body 21 and the second heat storage body 22 and burned, so that the thermal efficiency is high. In addition, since the switching valve 24, which is compactly configured, switches between the air supply passage and the exhaust passage, no special piping is required for switching the passage. Therefore, this heat storage type gas burner 1 has an extremely small amount of space as compared with the space required for installing a heat storage type gas burner using two conventional gas burners.
It is possible to install it at low cost.

[0022]

As described above, according to the present invention, since a single regenerative gas burner is provided with a compact switching valve, an external pipe for switching the air supply passage and the exhaust passage. Is unnecessary, the structure is simple as compared with the conventional two-unit heat storage type gas burner, the installation space is reduced, and the cost is reduced.

[Brief description of drawings]

FIG. 1 is a front view of a heat storage type gas burner.

FIG. 2 is a side sectional view of a heat storage type gas burner.

FIG. 3 is a rear view of the heat storage type gas burner.

FIG. 4 is a sectional view taken along the line AA of FIG. 2;

5 is a cross-sectional view taken along the line BB of FIG.

6 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 1 Heat Storage Type Gas Burner 2 Burner Main Body 2A Base Body 3 Gas Nozzle 11 First Passage 11A First Group Hole 12 Second Passage 12A Second Group Hole 21 First Heat Storage Body 22 Second Heat Storage Body 23 Heat storage body storage case 24 Switching valve 25 Air supply valve chamber 25A Air supply valve body 26 Exhaust valve chamber 26A Exhaust valve body 35 Air supply port 36 Exhaust port

Claims (2)

[Claims] 1. The secondary air supplied from the outside to the air supply port is burned on the outer peripheral portion of the nozzle part where the gas and the primary air supplied from the outside are mixed and burned at the tip part. The hole of the first group and the second group which alternately have a role of replenishing the exhaust gas and a role of sucking the exhaust gas in which the above-mentioned gas, the temporary air and the secondary air are burned, and discharging the exhaust gas to the outside from the exhaust port.
A hole is formed in the group, and a first passage communicating with the hole of the first group and a second passage communicating with the hole of the second group are formed, and an end portion of the first passage is formed. While providing the first heat storage body, the second heat storage body is provided at the end of the second passage, and further has an air supply valve chamber communicating with the air supply port and an exhaust valve chamber communicating with the exhaust port. The air supply valve chamber is provided with an air supply valve body for switching the secondary air from the air supply port to pass through the first heat storage body or the second heat storage body, while the exhaust valve chamber is provided with the air supply valve body. An exhaust valve body for switching the first heat storage body or the second heat storage body through which exhaust gas exhausted from the exhaust port passes is provided, and a switching valve for synchronously switching and driving the air supply valve body and the exhaust valve body is provided. A heat storage type gas burner characterized by the above. 2. The heat storage type gas burner according to claim 1, wherein a partition wall is formed at a boundary portion between the holes of the first group and the holes of the second group.