JPS6126733Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas burner used in water heaters and the like.

Conventionally, Bunsen burners have been used in gas water heaters, but these Bunsen burners have the following problems.

The maximum burner load cannot be large, and the burner itself is therefore large.

Excess air is required to completely burn the gas, so it is difficult to achieve high thermal efficiency.

It is difficult to draw in the necessary amount of primary air from low to high loads, and gas proportional water heaters cannot have a large proportional band width.

Because the mixing efficiency with secondary air is poor and the flame stretches, it is necessary to increase the height of the combustion chamber.

In conventional Bunsen burners, it is necessary to set the nozzle diameter and damper diameter for each gas type.

The purpose of this invention is to solve the above-mentioned problems, and by making the burner itself smaller and lowering the height of the combustion chamber, it is possible to lower material costs, and to increase thermal efficiency and widen the gas proportional range. It is something.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, a shows the main body, which is formed into a flat rectangular container shape with an open top by compression molding of a metal plate such as stainless steel. The primary air supply pipe attachment part 1 is formed by expanding it into a substantially square shape.

A primary air supply pipe insertion port 2 is provided at one end of this primary air supply pipe attachment part 1, and the other end is expanded outwardly coaxially and with the same diameter as the primary air supply pipe insertion port 2. A primary air supply pipe support part 3 is provided, and a gas supply pipe insertion port 4 with a smaller diameter is provided in this support part 3, and the primary air supply pipe insertion port 2 and the primary air The primary air supply pipe 5 is connected to the gas supply pipe insertion port 4 via the supply pipe support part 3.
A gas supply pipe 6 is attached via the gas supply pipe 6. Note that 7 is a support member that supports the gas supply pipe 6 at the center of the primary air supply pipe 5.

Further, the main body a has a first step portion 8 with a side surface projecting outward at a position slightly above the bottom surface portion, and a side surface portion slightly above the first step portion 8 further projects slightly outward. It has a second stage part 9,
An intermediate partition plate b is attached to the first step portion 8, and a cover c is attached to the second step portion 9, and a secondary air supply portion 10 is formed by the intermediate partition plate b and the cover c.

The secondary air supply section 10 has a secondary air supply pipe insertion port 11 opened on the side surface of the main body a at one end thereof, and has a secondary air supply pipe insertion port 11 opened on the side surface of the main body a coaxially and with the same diameter as the insertion port 11 at the other end. The secondary air supply pipe insertion port 11 has a bulged secondary air supply pipe support part 12.
And the secondary air supply pipe 13 is attached via the secondary air supply pipe support part 12.

The cover c is formed of a metal plate such as stainless steel into a planar rectangular plate shape having approximately the same size as the opening area of the main body a in the second stage portion 9, and has a compression molded plate in the center in the width direction. 2. The part was bulged upward over the entire length in the longitudinal direction.
It has a secondary air supply pipe storage section 14, and
Next air supply pipe storage section 14 and flat sections 1 on both sides thereof
5 has a large number of slit-shaped secondary air outlets 16, 16' arranged in parallel, each extending in the lateral direction of the cover c.

That is, the slit-shaped secondary air outlet 16,1
6' are arranged in three cases over the entire surface of the cover c.

Thus, the cover c is fitted onto the main body a from above the partition plate b, and is hooked onto the second step portion 9.

The secondary air supply pipe insertion port 11 and the secondary air supply pipe support part 12 correspond to both ends of the secondary air supply pipe storage part 14 on the side surface of the main body a when the cover c is attached to the main body a. It is installed in the place where

The partition plate b is a flat rectangular plate with approximately the same size as the opening area of a in the first step 8 portion, and is made of a metal plate such as stainless steel like the main body a and the cover c. After being fitted, the first step part 8
Hang on.

The partition plate b is provided with a large number of bulging portions 17 that bulge upward and have a substantially square cross section.

The above-mentioned swelling part 17 is provided in the secondary air outlet 16' other than the one provided in the secondary air supply pipe storage part 14 of the cover c installed above the partition plate b, that is, in the flat part 15 of the cover c. Two examples of secondary air outlet 16'
It is provided at a position corresponding to each of the above 2.
It bulges out into a slightly smaller bank shape than the secondary air outlet 16', is loosely inserted into the secondary air outlet 16', and slightly protrudes from the outlet 16' onto the upper surface of the cover c.

A mixed gas outlet 18 is provided in the shape of a slit in each bulging portion 17 over substantially the entire length thereof in the longitudinal direction.

This mixed gas outlet 18 constitutes a flame hole.

The primary air supply pipe 5 is made of a pipe with the same diameter as the primary air supply pipe insertion port 2.
The tube is inserted into the primary air supply pipe mounting part 1 of the main body a, the inner end is fitted into the primary air supply pipe support part 3, and the primary air supply pipe mounting part 1 is passed longitudinally and mounted on the part. Ru.

The gas supply pipe 6 is made of a pipe with the same diameter as the gas supply pipe insertion port 4, and is inserted into the main body a from the insertion port 4, and extends inside the primary air supply pipe 5 to near the primary air supply pipe insertion port 2. Extends.

The primary air supply pipe 5 and the gas supply pipe 6 are connected to the primary air supplied through the primary air supply pipe 5 and the gas supplied through the gas supply pipe 6 between the two pipes 5 and 6. A mixing chamber 19 is formed in which the gases to be mixed are mixed.

Further, the primary air supply pipe 5 has a mixed gas outlet 20 on its circumferential surface, and the mixing chamber 19 is separated by a partition plate b.
The mixed gas outlet 18 is connected to the mixed gas outlet 18.

The secondary air supply pipe 13 is the secondary air supply pipe insertion port 1
It is made of a pipe with the same diameter as 1, and is inserted into the secondary air supply pipe storage part 14 of the cover c from the insertion opening 11,
Fitting the inner end into the secondary air supply pipe support part 12,
It is installed on the main body a between the cover c and the partition plate b, with the upper half of the cover c in contact with the upper back surface of the secondary air supply pipe storage section 14 of the cover c.

Further, the secondary air supply pipe 13 has a secondary air outlet 21 on its upper surface that corresponds to the secondary air outlet 16 provided in the secondary air supply pipe storage section 14 of the cover c, and also has a secondary air outlet 21 on its lower surface. 21' will be opened.

Therefore, such a gas burner is installed below and above the combustion chamber of a water heater, etc., and the primary air supply pipe 5,
The secondary air supply pipe 13 is connected to an air supply source such as a fan, and the gas supply pipe 6 is connected to the gas supply source for use, and the gas supplied through the gas supply pipe 6 is used as the primary air supply. 1 fed through tube 5
It is mixed with secondary air in the mixing chamber 19, passes through the mixed gas outlet 20 of the primary air supply pipe 5, reaches the mixed gas outlet 18 of the partition plate b, that is, the flame hole, and is combusted there.

On the other hand, the secondary air supplied through the secondary air supply pipe 13 passes through the secondary air outlet 21 on the upper surface of the secondary air supply pipe 13, and then enters the secondary air supply pipe storage section 14 of the cover c. The air exits from the outlet 16, passes through the secondary air outlet 21' on the lower surface of the secondary air supply pipe 13, and then passes through the secondary air outlet 16' on the flat surface 15 of the cover c, and is supplied to the surroundings of each flame hole.

Since the present invention has the above configuration, it has the following advantages.

(1) Since the necessary secondary air can be reliably supplied around each flame hole, even when multiple flame holes are arranged in rows, the distance between the rows of flame holes can be shortened, and the burner can be made compact.

(2) The excess air ratio can be reduced and thermal efficiency can be increased.

(3) It is easy to supply only the required amount of primary air, and when used in a gas proportional water heater, the width of the proportional band can be increased.

(4) Since the secondary air is blown out from around each flame hole, the mixing efficiency is good and the flame can be prevented from spreading. Therefore, there is no need to increase the height of the combustion chamber, and the water heater etc. can be made more compact.

(5) Create a diffusion flame.

(6) Unlike conventional Bunsen burners, there is no need for nozzles and dampers that vary depending on each gas type, and the burner can be used in common for all gas types.

(7) The structure is simple and the assembly work is simple because the first and second steps are formed on the side wall of the main body, and the plate-shaped partition plate and cover are placed and mounted on these steps, respectively. It's easy.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a gas burner showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a partition. FIG. 5 is a cross-sectional view of the main body with the plate, secondary air supply pipe, and cover disassembled, and FIG. 5 is a perspective view of the main body with all parts disassembled. a... Main body, b... Partition plate, c... Cover, 1... 1
Secondary air supply pipe attachment part, 5...Primary air supply pipe, 6...
Gas supply pipe, 8...first stage part, 9...second stage part, 13
...Secondary air supply pipe, 16, 16'...Secondary air outlet of cover, 17...Bulging part, 18...Mixed gas outlet of partition plate, 20...Mixed gas outlet of primary air supply pipe, 21, 21 '...Secondary air outlet of the secondary air supply pipe.

Claims (1)

[Scope of utility model registration request] A main body formed in the shape of a container with an open top surface, a partition plate and a cover that fit into the main body one after another and are installed in the middle of the main body, and a cover that is inserted into the main body below the partition plate and has its inner end open. A gas supply pipe, a primary air supply pipe that is inserted into the main body coaxially with the gas supply pipe and loosely fits onto the gas supply pipe to close the inner end, between the partition plate and the cover. inserted into 2
The main body consists of a second air supply pipe, and the main body has one air supply pipe in the center of the bottom.
A primary air supply pipe attachment part is formed to bulge downward, and the primary air supply pipe is accommodated and arranged in this part, and a first stage part and a second stage part are sequentially provided from below on the side wall near the bottom. A cover is placed on the second step of the middle partition plate in the step part, and the primary air supply pipe and the middle partition board have a mixed gas outlet, and the secondary air supply pipe and the cover have a secondary air outlet, respectively. A gas burner comprising: a mixed gas outlet of a partition plate that bulges out onto the upper surface of the partition plate, loosely inserts a secondary air outlet of the cover, and opens at the top of the bulge protruding above the cover.