JPH0552310A - Burner for portable heater - Google Patents

Abstract

PURPOSE:To form a burner head and heat shielding cylinder as one body and reduce the work processes for machining and assembly and, at the same time, supply the air from a secondary air channel-in the center smoothly to the side of the flame port. CONSTITUTION:The burner 1 for a portable heater which is provided with a heat shielding cylinder 8 that covers the outer circumference of a temperature sensor for detecting the temperature at the bottom of a pan is constituted of a burner body 3 that forms a gas channel 2 and burner head 4 mounted on that burner body 3. In the outer circumference between the burner head 1 and burner body 3 a flame port 5 is formed. An air channel 6 is provided which communicates and opens in the center of the burner body 3 and burner head 1 above and below them. The heat shielding cylinder 8 that projects above the air channel 6 from the burner head 4 is provided in one body with the burner head 4. The inner diameter of the heat shielding cylinder 8 is formed smaller than the inner diameter of the air channel 6, and at the same time between the heat shielding cylinder 8 and the burner head 4 an air channel gap 9 is provided which communicates the air channel 6 with the side of the flame port 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove burner.

[0002]

2. Description of the Related Art In a burner for a stove equipped with a temperature sensor that detects the temperature of the pot bottom and controls combustion, heat is shielded so that the hot air of the flame does not directly affect the temperature sensor and erroneously detect the temperature of the pot bottom. A cylinder provided integrally with a burner head is disclosed in Japanese Utility Model Publication No. 60-147315.
A heat shield tube formed separately from the burner head is disclosed in Japanese Utility Model Laid-Open No. 59-188014.

[0003]

In the former case, the heat shield tube is provided with a slit in the vertical direction to supply the secondary air to the flame port through the slit.

In this case, if the width of the slit is narrow, it is 2
If the supply of the secondary air becomes insufficient and the width of the slit is widened, the effect as the heat shield tube is weakened.

Therefore, as shown in FIG. 10, it is conceivable to provide a drill hole b in the lower part of the heat shield cylinder a to supply the secondary air from the drill hole b, but in such a case, the machining is troublesome. There is a problem that the cost is high.

In the latter case, if the burner head and the heat shield cylinder formed by casting or forging are formed separately, not only the number of parts increases but also the cost increases.

Further, in each of the above-mentioned conventional examples, the inner diameter of the heat shield tube is larger than the inner diameter of the air passage, so that the air passage is raised.
The next air tends to rise as it is, and is supplied to the flame side 2
Next air tends to run short.

An object of the present invention is to obtain a burner for a stove which does not have such a problem.

[0009]

In order to achieve the above object, the present invention provides a burner for a stove equipped with a heat shield tube covering the outer circumference of a temperature sensor for detecting the bottom temperature of a pot, and a burner for forming a gas passage. A burner head mounted on the burner body and a burner head formed on the burner body, and a flame port is formed in the outer circumference between the burner head and the burner body, and the burner head and the burner head are provided above and below the burner head. An air passage communicating with the burner head is provided, and the heat shield cylinder protruding above the air passage from the burner head is provided integrally with the burner head, and the inner diameter of the heat shield cylinder is larger than the inner diameter of the air passage. The air passage is configured to have a small diameter, and an air passage gap is provided between the heat shield cylinder and the burner head so that the air passage communicates with the flame port side.

[0010]

In the gas stove device configured as described above,
Since the heat shield cylinder and the burner head are integrated, the number of parts is reduced, and the inner diameter of the heat shield cylinder is smaller than the inner diameter of the air passage. The flow of air in the air passage is narrowed in comparison with the flow of air inside, and the flow of air in the air passage hits the lower end surface of the heat shield tube and is guided to the flame mouth side. Secondary air easily flows toward the flame mouth side through the air passage gap.

[0011]

Embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a stove burner, which comprises a burner body 3 having a gas passage 2 and a burner head 4 mounted on the burner body 3. A flame port 5 is formed on the outer periphery between the burner head 3 and the burner head 4, and an air passage 6 is provided in the center of the burner body 3 and the burner head 4 so as to communicate with each other in the vertical direction.

Reference numeral 7 denotes a temperature sensor for detecting the temperature of the bottom of the pot and controlling combustion. The temperature sensor 7 is inserted through the air passage 6 and the bottom of a pot (not shown) which faces the upper surface of the burner 1 for the cooking stove. It is provided as it comes into contact with. Reference numeral 8 denotes a heat shield cylinder that covers the outer periphery of the temperature sensor 7. The heat shield cylinder 8 is provided above the air passage 6 so as to project upward from the burner head 4, and the heat shield cylinder 8 and the burner head 8 are provided. An air passage gap 9 communicating between the air passage 6 and the flame port 5 side is provided between the air passage 6 and the air passage 4.

The burner body 3 and the burner head 4 are formed by casting or forging. The burner head 4 shown in FIGS. 1 to 4 will be further described below. As shown in FIG. It is provided with a first tubular portion 10 that extends and a second tubular portion 8 ′ that protrudes upward from the burner head 4 and forms the heat-shielding barrel 8. The inner diameter ΦB of the first tubular portion 10 is about 32 mm. The outer diameter ΦA of 8'is smaller than this, about 30 mm, and the first cylinder is attached to the outer periphery of the lower portion of the second cylindrical portion 8 '.
Several columnar parts 12 projecting outward from the inner diameter ΦB of the cylindrical part 10 are provided at appropriate intervals. Thus, the columnar portion 1 is provided on the inner circumference of the first tubular portion.
Cutting is performed from the upper end of 2 to a position lower by the wall thickness t so that the inner diameter is ΦB. Then, the thin-walled portion 9a between the first tubular portion 10 and the second tubular portion 8'is scraped off by the cutting process, except for the columnar portion 12 having the wall thickness t, and is scraped off as shown in FIG. Part of the air passage 6 and the flame outlet 5
An air passage gap 9 is formed that communicates the sides. At this time, the inner diameter ΦB of the first cylindrical portion 10 forming the air passage 6 is always larger than the inner diameter ΦC of the heat shield cylinder 8. In other words, the inner diameter ΦC of the heat shield cylinder 8 becomes smaller than the inner diameter ΦB of the first cylinder portion 10, and the air flow rising through the heat shield cylinder 8 is throttled compared with the air flow in the air passage. At the same time, the flow of air in the air passage 6 hits the lower end surface 8a of the heat shield cylinder 8 and is guided to the flame port 5 side, and the air passage gap 9 provided between the heat shield cylinder 8 and the burner head 4 is provided. It is possible to improve the outflow of air as the secondary air toward the flame port 5 side via the. When the burner head 4 is placed on the burner body 3, the first cylindrical portion 10
The lower end of is fitted into an opening provided in the center of the burner body 3 to form the air passage 6. Reference numeral 14 denotes a second flame port provided on the upper surface of the burner head 4, and the air passage gap 9
Air was also supplied to the second flame port 14 via the.

In this case, as shown in FIG. 2, the second flame port 1
It is preferable that 4 does not face the columnar portion 12. In other words, it is better to make the second flame port 14 face the air passage gap 9, and thus the secondary air can be supplied to the second flame port 14 more reliably.

FIGS. 5 to 9 show another embodiment, in which the second cylinder portion 8'forming the heat shield cylinder 8 having an inner diameter .PHI.C of about 16 mm is the first cylinder portion having an inner diameter .PHI.B of about 32 mm. The burner head 4 is provided so as to face the inside of the burner head 4 and has a width of about 4 in the vertical direction at appropriate intervals along the outer periphery of the second cylindrical portion 8'of the burner head 4.
Three holes 13 of mm are provided so that the inner peripheral side thereof is inside the inner diameter ΦB of the first tubular portion 10.

Thus, the inner circumference of the first tubular portion 10 is set to the first tubular portion 10
From the upper end to a position lower by the wall thickness t so as to have the above-mentioned inner diameter ΦB. Then, the thin portion 9a located below the hole 13 between the first cylindrical portion 10 and the second cylindrical portion 8'is scraped off by the cutting work, and the hole 13 becomes the air passage 6 as shown in FIG. An air passage gap 9 is formed that communicates with each other and connects the air passage 6 and the flame outlet 5 side.

The first tube portion 10 and the heat shield tube 8 are connected to each other at three places on the circumference where the hole 13 does not exist and have a wall thickness t.
Connected by.

The inner diameter ΦB of the first tube portion 10 forming the air passage 6 is always larger than the inner diameter ΦC of the heat shield tube 8. In other words, the inner diameter ΦC of the heat shield cylinder 8 is equal to the inner diameter ΦB of the first cylinder portion 10.
The flow rate of the air becomes smaller and the air flow is throttled as in the above-mentioned embodiment, and the air as the secondary air flows out from the air passage 6 to the air passage gap 9 side by the guiding action of the lower end surface 8a of the heat shield cylinder 8. Is good. In particular, when the lower end surface 8a of the heat shield cylinder 8 is made to be an upwardly inclined surface as it goes toward the air passage gap 9 as in this embodiment, the air guiding action becomes more effective. Incidentally, 14
Indicates a second flame port provided on the upper surface of the burner head 4, and air is also supplied to the second flame port 14 through the air passage gap 9.

In this case, if the second flame port 14 is opposed to the air passage gap 9 as shown in FIG. 6, the secondary air can be supplied more reliably.

[0020]

The present invention having the above-described structure has the following effects. Since the heat shield cylinder and the burner head are integrated, the number of parts is reduced and the cost is lower, and since the inner diameter of the heat shield cylinder is smaller than the inner diameter of the air passage,
The flow of air rising in the heat shield is narrowed compared to the flow of air in the air passage, and the flow of air in the heat shield hits the lower end surface of the heat shield to the flame mouth side. The secondary air is guided and smoothly flows to the flame port side through the air passage gap provided between the heat shield cylinder and the burner head, and good combustion can be performed at the flame port.

[Brief description of drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

[Fig. 3] Side view of cutting of the burner head before cutting

FIG. 4 is a cutaway side view of the burner head after cutting.

FIG. 5 is a cutaway side view of another embodiment.

FIG. 6 is a plan view of FIG.

[Fig. 7] Side view of cutting of the burner head before cutting

FIG. 8 is a cutaway side view of the burner head after cutting.

9 is a bottom view of FIG.

FIG. 10 is a cutaway side view of an undesirable stove burner.

[Explanation of symbols]

 1 Burner for stove 2 Gas passage part 3 Burner body 4 Burner head 5 Flame port 6 Air passage 7 Temperature sensor 8 Heat shield tube 9 Air passage gap

Claims (1)

[Claims] 1. A stove burner including a heat shield cylinder that covers an outer periphery of a temperature sensor that detects a bottom temperature of a pot is composed of a burner body that forms a gas passage portion and a burner head that is mounted on the burner body. A burner head is formed on the outer circumference between the burner head and the burner body, and an air passage communicating with the upper and lower sides of the burner body and the burner head is provided at the center of the burner head. The heat shield cylinder protruding above the air passage from the burner head, the inner diameter of the heat shield cylinder is made smaller than the inner diameter of the air passage, and the heat shield cylinder and the burner head are arranged between the heat shield cylinder and the burner head. A stove burner having an air passage gap for communicating the air passage with the flame mouth side.