JP2684867B2 - Pot type burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving the ignition performance of a pot burner.

[0002]

2. Description of the Related Art The opening ratio of air holes formed in the side wall of a bottomed cylindrical pot is rough when the lower part is made coarse and the upper part is made dense, and a blue flame cap is provided at the middle part of the rough and dense pots. Known from. The applicant has filed a Japanese patent application regarding the relationship between the blue flame cap of the pot and the gap between the blue flame cap and the side wall of the pot.
-291118.

That is, the opening ratio of the primary air holes in the lower part of the blue flame cap is coarse and set to 10 to 14% of the total air ports, and the gap between the blue flame cap and the side wall of the pot is set to about 10 to 15 mm. ing. In this case, generally 10 to 15 air holes are formed in the side wall of the cylindrical pot per one row at equal intervals.

[0004]

As a common sense until the applicant develops an oil stove using a pot-type burner that allows exhaust gas to be discharged indoors with hot air, exhaust gas is common knowledge. It was recognized that the exhaust gas was discharged to the outside through an exhaust stack and the combustion amount was a large combustion amount (10,000 kilocalorie or more).

The applicant has continued to make efforts to realize an indoor open type stove for discharging exhaust gas into the room by using a pot type burner, and has already announced a practical product with various improvements. . The point of this improvement is to realize combustion with a Bunsen burner, which uses gas as fuel, with a pot-type burner, and to make the inside of the pot below the blue flame cap a premixing region.

Generally, this pot type burner is capable of stable combustion even if altered kerosene or mechanical oil in which the properties of kerosene have deteriorated are mixed, and nitrogen oxides (NOx) generated by combustion.
It has features such as a low amount. However, on the other hand, since it is a primitive combustion method that the fuel evaporates and burns in the pot, it is easy to misfire at the time of ignition, when the fuel vaporizes and mixes and burns in the pot, a burning noise is generated, and at the time of ignition, There are inherent problems such as generation of black smoke and white smoke and concern about odor before stable combustion.

This problem has not been solved even in the indoor exhaust type pot type burner, which has been completed by the applicant and has a small heating value.

[0008]

The present invention proposes the following in order to solve the above problems. That is, the dish-shaped blue flame cap 2 is provided above the inside of the pot 1, and the primary air hole row 3 having a rough opening is formed in the side wall of the pot 1 located below the blue flame cap 2 to the side of the blue flame cap. In a pot-type burner in which a secondary air hole array 4 having a close opening interval is bored upward, 2-3 holes of the lowermost hole array 3a of the primary air hole array 3 are continuously filled to provide a non-hole portion 5. It is a pot type burner.

When the mounting portion 6a of the ignition heater 6 is formed in the middle of the non-hole portion 5 and the holes on both sides of the ignition heater mounting portion 6a are made non-perforated, the non-perforated portion is provided effectively and in good balance. You can

[0010]

Operation: From the ignition of the pot type burner to the continuation of combustion is the same as the conventional one, and the ignition heater 6 is energized before ignition to create a high temperature condition in which fuel is easily vaporized and ignited. Pot 1
When air and fuel are supplied into the interior of the pot 1 and ignited, the mixture is mixed with the air from the primary air hole array 3 formed below the pot 1 to start combustion, and the flame is initially formed near the primary air hole array 3. Is
Gradually promote combustion. Eventually, when the amount of vaporized gas increases, the flame rises, and secondary combustion is performed by a large amount of air sent from the secondary air hole array 4 that is open to the side and above the blue flame cap 2.

By the way, the bottom row 3 of the primary air hole rows 3
When the non-perforated portion 5 is provided in a, the non-perforated portion is provided as long as the blue flame cap is burned downward as in ignition and the pot 1 itself has not yet reached a temperature suitable for burning fuel. In the vicinity of 5, the air becomes insufficient, and only the flame of the non-perforated portion 5 extends upward.

Therefore, immediately after ignition, the flame extends to the secondary air hole array 4 and the unburned gas rising to the secondary air hole array 4 is
It receives a sufficient amount of air supplied from the secondary air hole array 4 to start combustion, and has the function of quickly transitioning to normal combustion. When stable combustion starts, the lower part of the blue flame cap becomes a premixed region, so flame fragments Elongation disappears and complete combustion occurs around the secondary air hole array 4.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described below with reference to the drawings showing an embodiment. FIG. 1 is a sectional view of the essential part of the invention product, and FIG. 2 is an exploded view of the essential part of the same component. Common parts will be described with the same reference numerals.

Reference numeral 1 denotes a pot provided with a large number of air hole rows 3 and 4 on its side wall, and 2 denotes a blue flame cap arranged at the center of the upper portion of the pot 1, which is a primary air hole of the air hole rows 3 and 4. Row 3
Is formed below the blue flame cap 2 with a rough opening interval, and the secondary air hole array 4 is closely formed from the side of the blue flame cap 2 to the side wall of the pot 1 above. The coarse / dense ratio of the opening interval between the primary air hole array 3 and the secondary air hole array 4 is, for example, 10 to 15 primary air hole arrays 3 all around the circumference, and the vertical interval is narrow to 10 to 15 mm. Therefore, the aperture ratios of the primary air hole array 3 and the secondary air hole array 4 are close to 1: 9.

Reference numeral 6 denotes an ignition heater looking near the bottom of the pot 1. When the ignition heater 6 is energized, the ignition heater 6 itself becomes hot, and the bottom of the pot 1 is vaporized and ignited with fuel. It is heated to a suitable temperature. Reference numeral 5 denotes a non-perforated portion in which the holes in the lowermost hole row 3a of the primary air hole row 3 are made continuous for two to three holes. When the ignition heater 6 is attached to the side wall of the pot 1, ignition is performed as shown in FIG. If the holes on both sides of the mounting portion 6a of the heater 6 are made non-perforated, three non-perforated portions can be formed.

Reference numeral 7 denotes a mixing ring provided in the middle of the primary air hole array 3 and plays a role of improving mixing of the fuel gas vaporized and ignited at the bottom of the pot 1. Reference numeral 8 is a connection support piece that connects the mixing ring 7 and the blue flame cap 2, 9 is a wind tunnel provided to create an air passage A outside the pot 1, and 10 is a pot via the air passage A outside the pot 1. It is a blower that blows combustion air into the inside of 1.

Reference numeral 11 is a fuel tank for temporarily storing fuel from a separate tank or the like, 12 is an electromagnetic pump provided on the fuel tank 11 for supplying fuel to the pot 1, and 13 is an electromagnetic pump 1.
It is an oil feed pipe for feeding fuel from 2 to the pot 1, and is formed of a thin pipe also as a nozzle. Reference numeral 14 is an upper cylinder provided in the upper portion of the pot 1, and the upper cylinder 14 completes combustion and radiates heat upward.

[0018]

According to the present invention having the above-described structure and operation, the holes in the lowermost hole row 3a of the primary air hole row 3 of the pot 1 are not provided with uniform even intervals as in the conventional case, but a non-hole portion. Since 5 is provided to make it non-uniform, the flame in the vicinity of the non-hole 5 with the flame ignited by the ignition heater 6 extends upward in search of air, and this extended flame reaches the secondary air hole array 4, The unburned gas rising to the secondary air hole array 4 ignites and starts combustion. For this reason, in the secondary air hole array 4, a function of quickly shifting to normal combustion is created, and the transition from preliminary combustion to complete combustion is smoothly performed.

In the conventional structure in which the non-perforated portion 5 was also uniformly perforated, the phenomenon of blowing out was common, probably because the mixing balance of the vaporized gas and the blown air was not stable at the time of ignition. The blowout phenomenon (misfire) disappeared only by providing the hole 5.

Further, since the temperature of the pot 1 is not high at the time of ignition, it is common for the flame to circulate around the bottom of the pot 1 and slowly ignite, so until stable combustion is reached. Sometimes made a jarring burning noise, but no longer produced such an abnormal sound.

[0021] In these, the flame in the non-perforated portion 5 is unilaterally upwardly extended, so that the extended flame plays a role of a pilot fire, so that the combustion in the vicinity of the secondary air hole array 4 can be started in a short time. This is because the transition to combustion became faster, and the black smoke and white smoke at the time of ignition, which is a drawback of the conventional product, was completely eliminated and the odor was reduced, but these phenomena were discovered by the accumulation of experiments. Not a theoretical proof. At this point, it is understood that the early start of combustion in the vicinity of the secondary air hole array 4 due to the flaky extension of the flame induces all the effects.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a development view of a pot side wall showing an embodiment of the present invention.

[Explanation of symbols]

 1 Pot 2 Blue Flame Cap 3 Primary Air Hole Row 3a Bottom Row of Secondary Air Hole Row 4 Secondary Air Hole Row 5 No Hole 6 Ignition Heater 6a Ignition Heater Attachment

Claims (2)

(57) [Claims] 1. A pot-shaped blue flame cap 2 is provided above the inside of the pot 1, and the pot 1 is located below the blue flame cap 2.
In a pot-type burner in which a side wall is provided with a primary air hole array 3 with a rough opening interval, and a secondary air hole array 4 with a close opening interval is provided on the side and above the blue flame cap, the maximum of the primary air hole array 3 is obtained. A pot-type burner in which two or three holes in the lower hole row 3a are continuously filled to provide a non-hole portion 5. 2. The pot according to claim 1, wherein a mounting portion 6a of the ignition heater 6 is formed in the middle of the non-perforated portion 5, and holes on both sides of the ignition heater mounting portion 6a are non-perforated. Expression burner.