JP2003114009A - Vaporization oil burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an electrical cost during waiting for preheating of a vaporization oil burner and to ensure excellent combustion. SOLUTION: The vaporization oil burner comprises a burner head 15 to burn vaporized gas fed from a vaporizer 12; a mixing chamber 16 situated close to the vaporizer 12 and the burner head 15 and where a gas passage running from the vaporizer 12 to the burner head 15 is formed; and a control part 18 to control the temperature of the vaporizer 12. The mixing chamber is formed of a material, such as stainless, being low in thermal conductivity, the burner head 15 situated in parallel to the vaporizer 12 and formed that primary ports 15a to inject vaporized gas and secondary ports 15b to inject combustion air are alternately aligned and the direction of height is limited such that dew of vaporized gas in the mixing chamber 16 is not re-condensed during starting of combustion, and the control part 18 is waited for control of excitation of the vaporizer 12 in a noncombustion time zone with a temperature lowered than temperature during combustion after a lapse of a specified time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to power saving of a vaporized petroleum burner used for household water heaters and the like.

[0002]

2. Description of the Related Art Conventionally, a burner for a vaporization type oil water heater of this kind has been shown in FIG.

In FIG. 4, reference numeral 1 denotes a burner head case 1 having a U-shaped periphery, a carburetor 2 having a heater for vaporizing oil by closing the U-shaped opening surface, and the burner head case 1. The burner head 3 provided inside and a bottom surface of the burner head case 1 serve as a passage for supplying vaporized gas from the vaporizer 2 to the burner head 3 and have a heat conductivity of copper, aluminum or the like. Mixing chamber 4 using expensive materials
And a bowl-shaped burner case 5 serving as a combustion air passage having a predetermined gap between the burner head case 1 and the burner head case 1, and the burner head 3 ejects vaporized gas to perform combustion. Hat-shaped primary port 3a
And a secondary port 3b which is alternately arranged with the primary port 3a and ejects combustion air. The secondary port 3b is arranged vertically with the carburetor 2 and the combustion air is supplied from the end face portion 3c of the burner head 3. It was a thing.

[0004]

However, in the above-mentioned conventional structure, the heat transfer from the vaporizer 2 is made by using a material having high thermal conductivity such as copper or aluminum in the mixing chamber 4 in order to prevent condensation of vaporized gas. Therefore, the temperature of the mixing chamber 4 was maintained. Therefore, even when the carburetor 2 is in the preheat standby without combustion, the heat from the carburetor 2 moves to the mixing chamber 4 and the electricity cost of the carburetor 2 in the preheat standby is large. Was there.

Further, the combustion air is to be supplied from the end face side of the burner head 3 through the secondary port 3b arranged vertically to the vaporizer 2. Therefore, in order to cover the air ejected from the secondary port 3b, it is necessary to enlarge the combustion air inflow portion 3c of the secondary port 3b. Therefore, the primary ports alternately arranged with the secondary port 3b. 3a
The flame face of is also set to a high position, and even if combustion is started, the supply of heat from the flame face to the mixing chamber 4 becomes very small,
There were problems such as generation of white smoke and generation of odor due to condensation of vaporized gas.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to reduce standby electric power during standby for preheating and prevent re-condensation during combustion.

[0007]

In order to solve the above problems, a vaporization type oil burner of the present invention comprises a vaporizer for vaporizing a fuel, a burner head for burning vaporized gas supplied from the vaporizer, and the vaporization. A mixing chamber that is provided in close contact with the vaporizer and the burner head to form a gas passage from the vaporizer to the burner head, and a control unit that controls the temperature of the vaporizer, and the mixing chamber has a thermal conductivity such as stainless steel. The burner head is parallel to the vaporizer and has a primary port for ejecting vaporized gas and a combustion air for ejecting combustion air.
The following ports are arranged alternately, and the control unit waits for the energization control of the carburetor during a non-combustion time period to be lower than the temperature during combustion after a certain time.

According to the above invention, since the mixing chamber is made of a material having a low heat conductivity such as stainless steel, heat conduction from the carburetor can be significantly suppressed, and the temperature drop of the carburetor can be prevented. It is possible to significantly reduce the electricity cost during preheating standby by suppressing the heater energization. Further, since the temperature of the vaporizer is set to be low during standby, heat conduction to the mixing chamber can be further suppressed, and the effect of reducing the electricity bill during standby for preheating can be exerted.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present application is
A vaporizer that vaporizes fuel, a burner head that burns vaporized gas supplied from the vaporizer, and a mixing chamber that is provided in close contact with the vaporizer and the burner head to form a gas passage from the vaporizer to the burner head. And a controller for controlling the temperature of the vaporizer, the mixing chamber is made of a material having low thermal conductivity such as stainless steel, and the burner head is parallel to the vaporizer and ejects vaporized gas. The primary port and the secondary port that ejects combustion air are arranged alternately, and the height direction is restricted so that the vaporized gas in the mixing chamber does not recondens at the start of combustion, and the control unit controls the vaporizer during the non-combustion time zone. The energization control of (1) is made to be lower than the temperature at the time of combustion after a certain period of time, and the system stands by.

Since the mixing chamber is made of a material having a low thermal conductivity such as stainless steel, the heat conduction from the vaporizer can be significantly suppressed and the temperature drop of the vaporizer can be prevented. By suppressing the energization of the heater, it is possible to significantly reduce the electricity bill during standby for preheating. Further, with respect to the condensation of the vaporized gas at the start of combustion due to the decrease in the temperature of the mixing chamber, the height direction of the burner head is restricted to be as low as possible, so that the vaporized gas in the mixing chamber is radiated by combustion and the like. Since the temperature is raised, it is possible to prevent dew condensation during combustion. Further, since the temperature of the carburetor is set to be low during standby, heat conduction to the mixing chamber can be further suppressed, and the effect of reducing the electricity bill during preheating standby can be exerted.

Further, according to the second aspect of the present invention, when the temperature of the carburetor is lower than that at the time of combustion and the engine is on standby, it does not immediately respond to the required hot water supply load at the start of re-combustion and gradually burns. It is designed to increase the amount.

When the combustion is started from the stand-by state, the fuel is gradually increased to prevent vaporization failure and prevent condensation of vaporized gas.

Further, the invention according to claim 3 is such that the secondary port is provided with air inlets at both ends.

By introducing the combustion air from both ends, it is possible to uniformly supply the air to the entire combustion area in a small area, so that the height of the burner head can be limited to a low level and the mixing chamber can be controlled. Combustion can be formed at a position close to, and the temperature of the vaporized gas in the mixing chamber can be raised by radiant heat or the like, which is effective in preventing dew condensation during combustion.

Further, the invention according to claim 4 is such that the space in the mixing chamber becomes smaller while inclining from the lower part of the vaporizer toward the end face side of the burner head.

Since the side close to the vaporizer is wide and the burner head side is narrow, the heat transfer from the vaporizer is suppressed, and the heat from the flame port during combustion is mixed in the mixing chamber. It is possible to suppress the energization of the heater during standby for preheating and to maintain the temperature of the mixing chamber to prevent condensation of vaporized gas.

[0017]

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

FIG. 1 is a sectional view of a vaporizer type oil water heater burner according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.

In FIGS. 1 and 2, reference numeral 11 denotes a burner head case having a U-shaped periphery, and the U-shaped opening surface is closed by a vaporizer 12 having a heater. A vaporizer lid 13 is attached to the vaporizer 12 to seal vaporized gas, and a nozzle 14 having an opening above the vaporizer lid 13 and supplying fuel to the vaporizer 12 is provided.
On the other hand, a burner head 15 provided in the burner head case 11 and a bowl-shaped mixing chamber 16 serving as a passage for supplying vaporized gas from the vaporizer 12 to the burner head 15 are provided on the bottom surface of the burner head case 11. , This mixing room 1
6 is closely attached to the vaporizer 2 and the burner head 15,
In order to suppress heat conduction with the vaporizer 2 as much as possible, it is formed of a material having a low heat conductivity such as stainless steel.

Further, the mixing chamber 16 is constructed so as to have an inclination from the vaporizer 12 side to the end face side of the burner head 15 so that the bowl-shaped space is reduced.
By increasing the distance to the mixing chamber on the second side, heat conduction from the vaporizer 12 is suppressed.

As a result, it is possible to suppress heat dissipation loss of the carburetor 12 during standby for preheating and to suppress wasteful heater energization.

A vaporization thermistor 17 serves as a temperature control sensor for the vaporizer and detects the temperature of the vaporizer 12 to detect the temperature of the vaporizer 12.
Send data to 8. In addition, a heat insulating material is provided around the vaporizer 12 to prevent the vaporizer 12 from releasing heat.

Reference numeral 19 denotes a bowl-shaped burner case serving as a combustion air passage having a gap with the burner head case 11, and a heat insulating material 20 is provided on the bottom surface of the mixing chamber 16 and the bottom surface of the burner case 19. The burner head 15 is a hat-shaped primary port 1 which serves as a plurality of flame outlets for ejecting vaporized gas to perform combustion.
5a and the secondary port 15b alternately arranged with the primary port 15a for ejecting combustion air are formed on the same plane, and the secondary port 15b is configured to have air inlets at both ends, thereby reducing the size. The combustion air is evenly supplied over the entire combustion area in terms of area. The fact that the area of the air inlet of this secondary port 15b can be reduced is that the secondary port 15b
It is possible to set the height of b low,
As a result, the height of the burner head 15 can be reduced. That is, it becomes possible to form combustion at a position close to the mixing chamber 16, and the temperature of the vaporized gas in the mixing chamber 16 can be raised by radiant heat or the like, which is effective in preventing dew condensation during combustion.

In the present invention, the heights of the primary and secondary ports were set to about half (14 mm) of the conventional height (27 mm) and confirmed, but good results were obtained without white smoke due to dew condensation or the like. .

The burner head 15 has a secondary port 1
Since the air inlets are provided at both ends of 5b, a configuration in which they are arranged in parallel with the vaporizer 12 is adopted.

The operation of the vaporizing oil hot water supply burner configured as described above will be described.

When the operation switch of the water heater is turned on, the vaporizer 12 starts energizing and starts to rise to a temperature at which oil can be vaporized, and when the temperature reaches a predetermined temperature, the vaporization thermistor 17 provided in the vaporizer 12 A stop signal is sent to the control unit 18 to stop energization. On the other hand, when the energization is stopped, the temperature of the carburetor 12 lowers. Therefore, when the vaporization thermistor 17 lowers the temperature below a predetermined temperature, a signal for starting energization is sent to the control unit 18 to control the temperature of the carburetor 12. Is.
In this embodiment, the temperature is set to 255 ° C. stopped and 247 ° C. energized to stand by for preheating. On the other hand, when the temperature of the vaporizer 12 reaches a predetermined temperature, it becomes possible to start combustion.

The vaporizer 12 forms a transport passage for vaporized gas in the space consisting of the vaporizer lid 13, the burner head 15 and the mixing chamber 16. Therefore, the heat in the vaporizer 12 is always transferred to the mixing chamber 16.
By using a material having a low heat conductivity such as stainless steel for 6, a large amount of heat transfer can be suppressed as compared with a conventional material such as a copper plate. As a result, the electricity bill during standby for preheating can be significantly reduced.

On the other hand, as the temperature of the mixing chamber 16 decreases, this temperature decrease causes a problem of recondensation of vaporized gas during combustion.

Therefore, according to the present invention, the burner head 15 is arranged in parallel with the carburetor 12, and the combustion air can be introduced from both ends of the secondary port 15b, thereby reducing the area of the air introduction port. However, the height of the secondary port 15b is limited to a low value so that the height of the primary port 15a, which is the flame opening surface, can be similarly limited to a low value. For example, conventional (2
By setting the height (14 mm) to half the height (7 mm), a large amount of radiant heat during combustion and heat transfer from the flame nozzle surface can be supplied to the mixing chamber 16. Further, since the distance between the mixing chamber 16 and the bottom surface of the burner head 15 on the end face side of the burner head 15 becomes shorter, the heat supply from the burner head 15 also increases. Further, by making the mixing chamber 16 small in an inclined shape, it is easy to receive heat from the flame mouth surface, and the portion where heat is easily received from the carburetor 12 is deepened and the portion where heat is difficult to be received is shallowed so that the temperature of the mixing chamber 12 is reduced. Therefore, it is possible to prevent recondensation of the vaporized gas at the time of combustion by achieving uniformization.

When the non-combustion time zone such as the preheating standby time continues for a certain period of time, the control unit 18 changes the set temperature of the carburetor 12 so as to lower it, and further suppresses the heat radiation loss from the carburetor 12. There is. This operation will be described with reference to FIG. 5. In FIG. 5, the preset temperature of the preheat standby of the carburetor 12 is lowered after a lapse of a certain time after the end of combustion or the standby for preheat. In this embodiment, it is set such that after 30 minutes, 210 ° C. stop, 200 ° C. energization is performed, and after 30 minutes, 190 ° C. stop and 180 ° C. energization are repeated.

On the other hand, when the temperature is lower than the temperature at the time of combustion, it stands by,
When the combustion is started again, the hot water supply load required is not immediately met and the oil is gradually increased and sent to the carburetor 12.

In the above configuration, the oil to be originally supplied is determined by the hot water supply load. However, considering that the piping from the hot water supply dies due to natural heat dissipation after a certain period of time has elapsed after the combustion was stopped, even if the immediate hotness of the hot water is slightly lost due to the next combustion after the death of water, it is inadequate for use. Using the fact that it does not feel, lower the temperature setting of the carburetor 12 and start combustion at a setting that does not cause vaporization failure by reducing the oil supply amount and raise the temperature of the carburetor 12 to a predetermined temperature. It goes. Therefore, by lowering the temperature setting of the vaporizer, the amount of heat supplied to the mixing chamber 16 is reduced, the power can be reduced during standby, and the electricity bill during standby for preheating can be reduced.

[0034]

As described above, according to the present invention, by effectively combining the material and shape of the mixing chamber and the temperature control of the vaporizer, recondensation of vaporized gas during combustion does not occur,
It is possible to significantly reduce the power cost during the preheating standby.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vaporizer-type oil water heater burner according to an embodiment of the present invention.

FIG. 2 is a plan view of the burner for the vaporization type oil water heater.

FIG. 3 is a control sequence diagram of the burner for the vaporization type oil water heater.

FIG. 4 is a sectional view of a conventional vaporizer-type oil water heater burner.

[Explanation of symbols]

12 vaporizer 15 burner head 15a Primary port 15b Secondary port 16 mixing chamber 18 Control unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Norio Nobiya             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 3K052 AA09 AB08 EA00 GA05 GA10                       GC01 GE07

Claims (4)

[Claims] 1. A vaporizer for vaporizing fuel, a burner head for burning vaporized gas supplied from the vaporizer, and a gas passage from the vaporizer to the burner head provided in close contact with the vaporizer and the burner head. And a control unit for controlling the temperature of the vaporizer, the mixing chamber is made of a material having low thermal conductivity such as stainless steel, and the burner head is parallel to the vaporizer, and The primary port that ejects vaporized gas and the secondary port that ejects combustion air are arranged alternately, and the control unit waits for the energization control of the carburetor to fall below the temperature during combustion after a certain time during the non-combustion period. The vaporization type oil burner which was made to do. 2. When the carburetor temperature is lower than that at the time of combustion and waiting, it does not immediately respond to the required hot water supply load at the start of re-combustion, but gradually increases the combustion amount. 1. The vaporized petroleum burner described in 1. 3. The vaporized petroleum burner according to claim 1, wherein the secondary port is provided with air inlets at both ends. 4. The vaporizing petroleum burner according to claim 1, wherein the mixing chamber has a structure in which the space is reduced while inclining from the lower portion of the vaporizer toward the end face side of the burner head.