JPS61223419A - Burner for range - Google Patents

Abstract

PURPOSE:To restrain back fire and stabilize combustion upon weak combustion by extending a multitude of partitionings of a burner cap radially from the upper surface of a burner body. CONSTITUTION:The burner cap 4, provided with a multitude of partitionings 6'' and the openings thereof, is fitted detachably to the burner body 2 to form flame ports 7 on the circumference of the burner cap 4 and flame port paths 6 at the inside of the same cap 4 while the partitionings 6'' of the burner cap 4 are extended radially from the upper surface of the burner body 2. Heat transfer area near the flame ports 7 of the burner cap 4 is increased and, therefore, the radiation of heat near the flame ports 7 may be promoted. According to the promotion of radiation, local temperature rise near the flame ports 7 is reduced and, therefore, the temperature rise of mixture 5' passing through the flame ports 7 may also be reduced. Accordingly, combustion speed is not increased and back fire is not readily caused under weak combustion whereby stabilized flames may be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to stoves for domestic or commercial use.

Conventional technology The conventional technique will be explained according to FIG.

In Fig. 3, 1 is the burner body, and the burner body 2
The burner cap 4 is formed by fitting the upper surface 3 of the burner cap 4 into a substantially disc-shaped burner cap 4. 5 is a passage formed in the burner body 2 and the burner cap 4, through which a mixture 5' is sent from a mixing pipe (not shown). In addition, the space formed by the numerous openings and openings 6' of the burner cap 4 and the upper surface 3 of the burner body 2 is the flame hole passage 6, and the downstream side of the air-fuel mixture 5' is the flame hole passage outlet, and the flame hole 7 is formed. Let it form. The outer diameter of the flame hole 7 and the outer diameter of the upper surface 3 of the burner body 2 are substantially the same, and the inner diameter of the sash portion 6' and the inner diameter of the upper surface 3 of the burner body 2 are substantially the same.

8 is a flame formed in the flame hole 7. 9 is secondary air supplied to the flame 7. A secondary air hole 11 is provided approximately at the center of the burner cap 4 and supplies a portion of the combustion air. Reference numeral 12 denotes a substantially conical burner cover attached to the burner body 2, and is used to catch boiled over water from a pot (not shown).

Now, one of the conditions that a burner must meet is flame stability. Cook stove burners often adjust the heat power depending on the content of cooking (for example, "High J 2000").
Kcal/h -r a little J 500 Kcal/h) Flame stability is required in all combustion ranges. For this reason, efforts were made mainly around the flame hole 7 area.

Problems to be Solved by the Invention However, in the configuration as shown in Fig. 3, even if a stable flame can be formed due to the balance between the ejection velocity from the flame hole 7 and the combustion velocity, in the case of combustion, if the combustion amount is reduced. , the jetting velocity of the air-fuel mixture from the flame hole 7 decreases, and the flame 8 is formed very close to the flame hole 7, and because it comes into contact with the outer periphery of the burner cap 4, the temperature near the flame hole of the burner cap 4 locally decreases. It tended to get bigger. As a result, the air-fuel mixture 5' was heated and the combustion speed increased, which could cause flashback into the mixing tube (not shown). This tendency was particularly noticeable in the case of gases such as 60 etc., which had a relatively high burning rate.

The present invention solves the problems of the conventional technology.
The overall purpose is to suppress flashback and stabilize combustion by preventing a local temperature rise near the flame hole during combustion.

Means for Solving the Problems In order to solve the above-mentioned problems, the stove burner of the present invention removably fits a burner cap and a burner body, each having a large number of partitions and openings, to form flame holes around the burner cap. A burner hole passage is formed inside the burner cap, and a partition portion of the burner cap extends in a radial direction from an upper surface of the burner body.

action The F3A of the present invention has the following effects due to the above-described configuration.

By extending the multiple partitions of the burner cap in the radial direction from the upper surface of the burner body, the heat transfer area can be increased compared to the conventional method, and heat dissipation near the flame hole can be promoted. Therefore, the local temperature rise near the flame hole is reduced, and 1
It is possible to suppress backfire during "weak" combustion and stabilize combustion.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. Note that the same numbers as in the conventional example represent the same names and parts, and detailed explanations will be omitted. In FIGS. 1 and 2, σ is a part that limits the opening of the burner cap 4, and is partially in close contact with the upper surface 3 of the burner body 2, forming the flame hole passage 6 and the flame hole 7.
is formed. The threshold 9 portion 6° is longer in dimension than the upper surface 3 in the radial direction.

In the above configuration, the heat transfer area of the burner cap 4 in the vicinity of the flame hole 7 increases, and heat radiation in the vicinity of the flame hole 7 can be promoted. Therefore, the local temperature rise in the vicinity of the flame hole 7 is reduced, and the temperature rise of the air-fuel mixture 6' passing through the flame hole passage 7 is also reduced. Therefore, flashback is less likely to occur even in the case of "weak" combustion without increasing the combustion speed.

Another means for preventing backfire is the flame hole passage 6 and the flame hole 7.
Although it is possible to prevent the flame from propagating into the mixing tube by reducing the opening area of the mixing tube, it has the disadvantage that the flow resistance during combustion increases and Co is more likely to be generated due to insufficient air suction. be. In one embodiment of the present invention, since the opening areas of the flame hole passage 6 and the flame hole 7 are not reduced, a stable flame can be obtained even during combustion of 1- or more.

Effects of the Invention As described above, the stove burner of the present invention provides the following effects.

(1) Since the temperature rise in the flame hole of the burner cap is reduced, backfire is less likely to occur even during "weak" combustion, and a stable flame can be formed.

(2) Since the flame hole passageway and the opening area of the flame hole are not reduced, a stable flame can be obtained even during "strong" combustion.

((2) Local overheating of the burner cap is eliminated, and the life of the flame hole can be expected to be extended.

[Brief explanation of drawings]

@ Figure 1 is a schematic sectional view of a stove burner showing an embodiment of the present invention, Figure 2 is a partially enlarged sectional view of the flame hole portion, and Figure 3 is a schematic sectional view of a conventional stove burner. 2...Burner body, 3...Top surface, 4...
... Burner cap, 6 ... Flame hole passage,
6°... Shikiri part, 7... Flame hole.

Claims (1)

[Claims] A burner cap having a substantially disk shape having a large number of partitions and openings and a burner body are removably fitted together to form a flame hole and a flame hole passage inside the burner cap, and the partitions of the burner cap are connected to the burner body. A stove burner that extends radially from the top surface of the stove.