JP2000249308A - Combustion equipment - Google Patents

Abstract

(57) [Summary] [Problem] To provide a combustion device having a compact burner section. SOLUTION: Since a flame 32 is formed on a flame port 28 and a circulation region 36 is formed in the vicinity of the jet port 30 by a flow velocity of secondary air jetted from a jet port 30 of a secondary air port 31, so that the flame is formed. The flame 32 formed in the port 28 is attracted to the secondary air port 31, and the flame 32 is also provided on the upper surface of the secondary air port 31.
Is formed. Therefore, the flame area formed on the burner head 27 increases on the upper surface of the secondary air port 31, and the flame area for burning the required amount of combustion increases by the flame area 29 on the upper surface of the secondary air port 31. And the burner head 27 can be made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for a heat source such as a water heater or a heater.

[0002]

2. Description of the Related Art Conventionally, a combustion device of an oil-fired device mounted on a water heater or a heating device has a liquid fuel vaporized and burned in response to demands for lowering noise, downsizing the device, and expanding a range of adjusting a combustion amount. A vaporization method is used.

A conventional combustion apparatus of this type is disclosed in Japanese Unexamined Patent Publication No.
Those disclosed in JP-A No. 19611 and JP-A No. 9-119612 were common. Hereinafter, the configuration will be described with reference to FIGS. 6 and 7. As shown in FIGS. 6 and 7, a pump 1 for supplying liquid fuel, a nozzle 2 connected to the pump 1 for ejecting liquid fuel, and a heater 3
And a vaporizer 7 having a vaporization surface 4 for vaporizing the liquid fuel ejected from the nozzle 2, a heat receiving portion 5 provided on the back surface of the vaporization surface 4, an outlet 6 at the bottom, and a vaporization surface 4. A vaporizer lid 9 having an opening 8 for supplying combustion air into the vaporizer 7 facing the center, a mixing chamber 10 communicating with the outlet 6 at the lower part of the vaporizer 7, and a mixing chamber 10 at the upper part of the mixing chamber 10. Burner unit 11 provided on the back side of vaporizer 7 and blower 1 for supplying combustion air
The burner section 11 is composed of a plurality of alternately provided flame holes 13 and a secondary air supply section 14. The flame holes 13 are formed in a convex shape, and On both side walls, there is provided a flame holding guide 15 whose upper part facing the flame hole part 13 is bent obliquely upward and opposite to the flame hole part 13,
The secondary air supply unit 14 has a secondary air hole 16 at the bottom in a concave shape between the adjacent flame holes 13.

Next, the operation and operation will be described. After the heater 3 is energized to raise the temperature of the vaporizer 7 to the set vaporizable temperature, the liquid fuel supplied from the pump 1 and part of the combustion air supplied from the blower 12 are supplied as primary air. Then, the vaporized gas vaporized by the vaporizer 7 is also sent to the mixing chamber 10 through the lower outlet 6 due to the blowing air of the combustion air, and after being uniformly mixed, is sent to the burner unit 11. A flame is formed in the flame hole portion 13 and burned. On the other hand, the remainder of the combustion air is sent as secondary air to the secondary air supply unit 14 and is ejected from the secondary air holes 16. The flame is reliably held in the flame hole portion 13 by the flame holding guide 15, and stable combustion is maintained by the secondary air. Further, the heat of combustion of the flame is received by the heat receiving section 5, and the heater 3 is operated or stopped in accordance with the temperature of the vaporizer 7 to maintain the temperature of the vaporizer 4, thereby continuing the combustion. .

[0005]

However, in the above-mentioned conventional combustion apparatus, the flame is formed only in the area where the flame is held by the flame holding guide. Further, the secondary air supply section only supplies secondary air from the secondary air holes to the flame on the flame holes to maintain good combustion. Therefore, the flame area for burning the required amount of combustion is only the flame hole, and if the flame hole is made compact, the amount of combustion per unit area of the flame hole will increase, and the flame will blow off or the flame length will increase. Therefore, there is a problem that the burner cannot be made compact.

An object of the present invention is to solve such a conventional problem and to make the burner compact.

[0007]

In order to solve the above-mentioned problems, the present invention comprises a burner head in which a flame port and a secondary air port are alternately arranged. It is configured to be formed thereon.

With the above construction, the present invention increases the area of the flame for burning the required amount of combustion by providing a flame hole and a secondary air port as compared with only the flame port. The burner head can be made compact by reducing the flame opening area corresponding to the flame holding area.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The combustion apparatus according to the first and second aspects of the present invention includes a burner head in which a flame port and a secondary air port are alternately arranged. Is formed, and the flame is formed on the flame port and the secondary air port. Therefore, the flame area for burning the required amount of combustion is 2 mm.
The secondary air port increases as compared with only the flame port, so that the area of the flame port corresponding to the flame holding area of the secondary air port can be reduced and the burner head can be made compact.

According to a third aspect of the present invention, there is provided a combustion apparatus comprising:
Since the distance from the center of the outlet of the secondary air port to the flame port and the half of the flame port width are almost the same, a circulation area is formed near the secondary air port, and The flame is drawn into the circulation area, and a flame is formed on the secondary air port, so that the area of the flame port corresponding to the flame holding area of the secondary air port can be reduced to make the burner head compact. it can.

According to a fourth aspect of the present invention, there is provided a combustion apparatus comprising:
Since the distance from the end of the outlet of the secondary air outlet to the flame outlet and the width of the flame outlet are substantially the same, a negative pressure region is formed near the outlet of the secondary air, and the flame outlet is formed. The upper flame is pulled into the circulation area and faces the flame port of the secondary air port 2
A flame is formed on the secondary air port, so that the flame port area can be reduced by the flame holding area of the secondary air port, and the burner head can be made compact.

According to a fifth aspect of the present invention, there is provided a combustion apparatus comprising:
Since the distance from the center of the outlet of the secondary air port to the flame outlet and the pitch of the secondary air outlet are substantially the same, a circulation region is formed near the secondary air outlet, and the flame outlet is formed. The upper flame is pulled into the circulation area, and a flame is formed on the secondary air port facing the flame port of the secondary air port and on the space between the jet ports. The burner head can be made compact by reducing the area of the flame opening portion corresponding to the flame holding area.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a combustion apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of a main part of the combustion apparatus.

1 and 2, reference numeral 17 denotes a pump for supplying liquid fuel, reference numeral 18 denotes a nozzle for ejecting the supplied liquid fuel, and reference numeral 19 denotes a vaporizer for heating and vaporizing the liquid fuel ejected from the nozzle 18, and a heater. 20 and is made of a material having good thermal conductivity such as aluminum die casting, iron casting, copper casting, and alloy casting thereof. The vaporizer 19 includes a vaporizing surface 21 and a heat receiving unit 22 provided on an outer wall. 23
Is a carburetor lid having an opening 24 for supplying combustion air into the carburetor 19 in opposition to a substantially central portion of the carburetor surface 21; 25 is an outlet provided at the lower end of the carburetor 19; A mixing chamber 26 is provided downstream of the vaporizer 20 in communication with the mixing chamber 26. The mixing chamber 26 is made of a material having good heat conductivity, such as aluminum, copper, an alloy thereof, an iron casting, a copper casting, or an alloy casting thereof. Reference numeral 27 denotes a burner head for burning the air-fuel mixture formed in the mixing chamber 26, provided downstream of the mixing chamber 26 and connected to the vaporizer 19. Burner head 27
In the figure, a flame port portion 29 having a porous flame port 28 formed of a punching plate, a net, a laminated plate or the like and a secondary air port portion 31 having a jet port 30 are alternately arranged. The jet port 30 is provided at the center of the upper surface of the secondary air port 31, and is formed of a round hole, a slit shape, a punching plate, or the like. 32
Is a flame formed by the burner head 27, 33 is a blower for supplying combustion air, 34 is a temperature detector composed of a thermocouple or thermistor for detecting the temperature of the vaporizer 19, and 35 is a signal from the temperature detector 33. The controller controls the operation of the heater 20 in response to the request.

Next, the operation and function will be described. In the above configuration, when a power supply (not shown) is turned on, the control unit 35
, The heater 20 is energized to heat the vaporizer 19. When the temperature detector 34 detects that the vaporizer 19 has reached the predetermined temperature, the signal is transmitted to the control unit 35 and the power supply to the heater 20 is stopped to complete the preheating. Thereafter, the controller 35 keeps the temperature of the carburetor 19 constant while turning on and off the power supply to the heater 20, and enters a standby state. In the case of the hot water heater in the standby state, when the faucet of the hot water supply circuit is opened, a part of the combustion air from the blower 33 flows into the vaporizer 19 as the vaporizing air from the opening 24 and the liquid fuel is pumped. From the nozzle 18 via the vaporizing surface 21
Spouts.

The liquid fuel collides with the vaporizing surface 21 together with the vaporizing air flowing into the vaporizer 19, is pushed out to the surroundings, is heated and vaporized, and is mixed with the vaporizing air to form a combustible air-fuel mixture. The combustible air-fuel mixture flows into the mixing chamber 26 from the outlet 25, is uniformly mixed in the mixing chamber 26, and is sent to the flame port 29. The combustible air-fuel mixture ejected from the flame port 29 is ignited by ignition means (not shown), and a flame 32 is formed on the flame port 28 and burned. The remainder of the combustion air is sent to the secondary air port 31 as secondary air, and is jetted from the jet port 30. The secondary air jetted from the jet port 30 forms a circulation region 36 near the jet port 30 by the flow rate of the secondary air, and attracts the flame 32 formed on the flame port 28 to cause the secondary air port section 31. A flame 32 is also formed on the upper surface. This flame 32
The combustion heat is received by the heat receiving section 22 to suppress the energization of the heater 20 to continue the combustion.

According to a first embodiment of the present invention, the flame 32
Is formed on the flame outlet 28 and the secondary air blown out from the outlet 30 of the secondary air port 31 forms a circulation region by the flow rate of the secondary air near the outlet 30. The flame 32 formed on the secondary air port 31 is attracted to the secondary air port 31 and the flame 32 is also formed on the upper surface of the secondary air port 31. Therefore, the flame 32 formed in the burner head 27 becomes the flame port 28 and the upper surface of the secondary air port 31, and the flame area increases as the upper surface of the secondary air port 31 increases. The area of the flame outlet can be reduced by an amount corresponding to the upper surface of the secondary air port portion 31 as compared with the area of the flame outlet on the conventional flame outlet 28 alone. As a result, the area of the burner head 27 can be reduced and the burner head 27 can be made compact.

(Embodiment 2) FIG. 3 shows a combustion apparatus according to Embodiment 2 of the present invention.

The second embodiment differs from the first embodiment in that the center of the jet port 30 of the secondary air port 31 extends from the flame port 2
In other words, the distance a up to 9 and the half of the width b of the flame port 28 are substantially the same.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted.

Next, the operation and function will be described. Since the distance from the center of the ejection port 30 of the secondary air port 31 to the flame port 29 and the width of the flame port 28 are almost the same, the secondary A circulation region is more easily formed in the vicinity of the air outlet 30, and the flame 32 on the flame outlet 29 is pulled by the circulation region,
The flame 32 is also formed on the secondary air port 31, so that the area of the flame port corresponding to the flame holding area of the secondary air port 31 can be reduced and the burner head 27 can be made compact.

(Embodiment 3) FIG. 4 shows a combustion apparatus according to Embodiment 3 of the present invention. The third embodiment is different from the first embodiment (or 2) in that the distance d from the end of the outlet 30 of the secondary air port 31 to the flame port 29 and １ ／ of the width b of the flame port 28 are different.
Are substantially the same.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted.

Next, the operation and operation will be described. The distance d from the end of the jet port 30 of the secondary air port 31 to the flame port 29 is d.
And the width b of the flame port 28 are made substantially the same, so that a circulation area is more easily formed near the outlet 30 of the secondary air, and the flame 32 on the flame port 29 is pulled into the circulation area, The flame 32 is formed on the secondary air port 31 facing the flame port 29 of the secondary air port 31, and
The burner head 27 can be made compact by reducing the flame outlet area by the flame holding area of the next air outlet 31.

(Embodiment 4) FIG. 5 shows a combustion apparatus according to Embodiment 4 of the present invention. The fourth embodiment differs from the first embodiment (or 2, 3) in that the ejection port 30 of the secondary air port 31 is different from the first embodiment.
Distance a from the center of the flame to the flame port 29 and the secondary air port 31
Of the nozzles 30 of the nozzles are substantially the same.

Next, the operation and function will be described. The distance a from the center of the jet port 30 of the secondary air port section 31 to the flame port section 29 is as follows.
And the pitch d of the ejection port 30 of the secondary air port 31 is substantially the same, so that a circulation area is also formed in the vicinity between the ejection ports 30 of the secondary air, and the flame 32 on the flame port 29 is pulled into the circulation area. The flame 32 is also formed on the secondary air port 31 facing the flame port 29 of the secondary air port 31 and between the jet ports 30. The burner head 27 can be made compact by reducing the flame opening area by the flame holding area.

In each of the above embodiments, the flame port 28 and the jet port 30 are on the same plane, but a slight step may be provided.

[0029]

As described above, according to the first aspect of the present invention,
According to the combustion device of the second aspect, the flame is formed on the flame outlet, and the secondary air ejected from the outlet of the secondary air port forms a circulation region by the flow velocity of the secondary air near the outlet. Therefore, the flame formed in the flame port is attracted to the secondary air port, and the flame is also formed on the upper surface of the secondary air port. Therefore, the flame formed on the burner head becomes the flame port and the upper surface of the secondary air port, and the flame area increases for the upper surface of the secondary air port. The area of the flame port can be reduced by the amount of the upper surface of the secondary air port as compared with only the area of the flame port. As a result, there is an effect that the area of the burner head can be reduced and the burner head can be made compact.

According to the combustion apparatus of the third aspect, the distance from the center of the outlet of the secondary air port to the flame port and the half of the flame port width are substantially the same. A circulation region is more likely to be formed near the air outlet, and the flame on the flame outlet is pulled into the circulation region, so that a flame is also formed on the secondary air outlet. Thus, there is an effect that the burner head can be made more compact by reducing the flame opening area corresponding to the flame holding area.

According to the fourth aspect of the present invention, since the distance from the end of the outlet of the secondary air port to the flame port and 1/3 of the flame port width are substantially the same, 2 A circulation region is more likely to be formed in the vicinity of the outlet of the secondary air, and the flame on the flame outlet is pulled into the circulation region, so that the flame on the secondary air outlet facing the flame outlet of the secondary air outlet is formed. A flame is formed, and there is an effect that the burner head can be made more compact by reducing the flame opening area corresponding to the flame holding area of the secondary air port.

According to the combustion apparatus of the fifth aspect, the distance from the center of the outlet of the secondary air port to the flame outlet is substantially equal to the pitch of the outlet of the secondary air port. Since a circulation region is also formed in the vicinity between the outlets of the secondary air, the flame on the flame opening is pulled into the circulation region, and the secondary air opening facing the flame opening of the secondary air opening is formed. A flame is also formed between the upper portion and the portion between the ejection ports, so that the burner head can be made more compact by reducing the flame outlet area corresponding to the flame holding area of the secondary air port.

[Brief description of the drawings]

FIG. 1 is a sectional view of a combustion device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a burner head portion of the combustion device.

FIG. 3 is an enlarged sectional view of a burner head portion of a combustion device according to a second embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a burner head portion of a combustion device according to a third embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a burner head portion of a combustion device according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view of a conventional combustion device.

FIG. 7 is an enlarged sectional view of a burner head portion of the combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 19 Vaporizer 21 Vaporization surface 22 Heat receiving part 23 Vaporizer lid 26 Mixing chamber 27 Burner head 28 Flame port 29 Flame port 30 Spray port 31 Secondary air port 32 Flame 35 Circulation area

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takehiro Nagatoshi 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Terms (reference) 3K052 AA10 AB01 AB04 AB06 AC05 DA09 DB01

Claims (5)

[Claims] 1. A combustion apparatus comprising a burner head in which a flame port and a secondary air port are alternately arranged, and wherein a flame is formed on the flame port and the secondary air port. 2. The combustion apparatus according to claim 1, wherein the secondary air port is formed on the secondary air port together with the flame port so as to attract the flame formed in the flame port. 3. The combustion apparatus according to claim 1, wherein the distance from the center of the jet port of the secondary air port to the flame port is substantially equal to 1/2 of the flame port width. 4. The distance from the end of the outlet of the secondary air port to the flame port and 1/3 of the flame port width are substantially the same.
Or the combustion device according to 3. 5. The combustion according to claim 1, wherein the distance from the center of the ejection port of the secondary air port to the flame port is substantially equal to the pitch of the ejection port of the secondary air port. apparatus.