JPS6335222Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention vaporizes liquid fuel such as kerosene, premixes this vaporized gas with combustion air, and burns it. The present invention relates to a radiant combustion appliance configured to

(b) Prior art A burner that vaporizes liquid fuel in a vaporization chamber and combusts a premixed gas of vaporized gas and combustion air with green flame on a flame nozzle member produces very few harmful emissions such as CO and is soot-free. Since there is no generation of kerosene, its utility value is very high as an indoor open type kerosene heater. By the way, regarding the burner of the conventional configuration mentioned above,
An electric vaporization heater that heats the peripheral wall of the vaporization chamber,
It is controlled by a temperature detector such as a thermistor installed on the peripheral wall of the liquid fuel to approximately 250℃, which is the vaporization temperature of the liquid fuel.
Although it is configured to maintain the temperature at around 300℃, the secondary air flow cools the peripheral wall of the vaporization chamber because the air is passed around the burner as secondary air. This resulted in a drawback that the energization time of the vaporizing electric heater was longer. In addition, if a red-hot member that is heated by combustion gas and becomes red-hot is placed above the burner and an attempt is made to increase the heating effect by radiation, the heat rays radiated from the red-hot member will cause the space below the inside of the appliance to be damaged. There was a problem in that the ambient temperature rose, which adversely affected thermal components such as the oil level regulator, the electromagnetic pump for fuel supply, and its oscillator, which were installed using the space below the equipment.

(c) Purpose of the invention The present invention was made in view of the above-mentioned drawbacks of the prior art, and aims to improve the heat retention of the peripheral wall of the vaporization chamber of the burner to save power in the vaporization electric heater, and to shorten the ignition time. The object of the present invention is to provide a radiant combustion appliance that can be shortened and prevent adverse thermal effects on components disposed in the lower space inside the appliance.

(d) Structure of the invention In order to achieve the above-mentioned object, the invention includes a burner that vaporizes liquid fuel in a vaporization chamber and burns a premixed gas of the vaporized gas and combustion air on a flame port member; A vaporizing device comprising a combustion tube facing a flame port member of a burner, and a red-hot member disposed within the combustion tube and heated by the combustion gas of the burner, and heating a peripheral wall portion of the vaporization chamber. In an electric heater configured to be controlled by a temperature detector,
The burner is housed in a cylindrical burner container with a bottom, and a heat insulating material is interposed between the burner container and the peripheral wall of the vaporizing chamber, and the upper opening of the burner container is made of a stainless steel plate. It is constructed by covering it with a reflective plate made of.

(E) Example An example of the present invention will be described below. In the figure, 1 is an air supply blower that sucks outside air through a filter 2, and includes a motor 4 installed in a suction passage 3, two turbo-type air supply fans 5 rotated by the motor 4, 5 and a fan case 6 that accommodates the air supply fans 5, 5, and the air sent by the air supply blower 1 is supplied via an air amount regulator 7 made of a solenoid damper or the like. The air is sent from the air pipe 8 to the air nozzle 9. The combustion primary air whose air volume is adjusted by the air volume regulator 7 is forced into the vaporization chamber 11 of the burner 10 through the air nozzle 9.

Reference numeral 12 denotes an oil level regulator which includes a removable cartridge tank 13 and stores a substantially constant amount of liquid fuel therein.
A fuel supply pipe 1 that is sucked up by an electromagnetic pump 15 driven by a pump and faces into the air nozzle 9.
The fuel is atomized and supplied into the vaporization chamber 11 from the fuel nozzle 17 at the tip of the fuel nozzle 6 .

The burner 10 covers the peripheral wall 18 of the vaporizing chamber 11 by approximately
Equipped with a vaporization electric heater 19 that heats to 250°C to 300°C, vaporizes the liquid fuel supplied into the vaporization chamber 11, and premixes the vaporized gas and combustion primary air within the vaporization chamber 11, This premixed gas is passed through the throttle passage 20 and the outlet passage 21 to the oblong flame port member 2.
2, a line-shaped blue combustion flame 23 is formed on this flame port member 22, and the flame is combusted. 24,2
Reference numeral 4 denotes a heat recovery section that stands upright along the longitudinal direction at both ends of the horizontally elongated burner port member 22. 25 is vaporization chamber 1
A temperature detector such as a thermistor attached to the circumferential wall 18 of 1 detects the temperature of the circumferential wall 18 and controls the vaporization electric heater 19 on and off.

Reference numeral 26 denotes a deep-drawn burner container having a bottom cylindrical shape at the bottom and an elliptical cylindrical top. It is fixed on the burner stand 27 together with the wall portion 26a. 28 is a disc-shaped bottom insulation material interposed between the bottom surface of the burner 10 and the bottom wall portion 26a of the burner container 26;
Reference numeral 29 denotes a circumferential side heat insulating material interposed between the inner surface of the circumferential wall 26b of the burner container 26 and the outer circumferential surface of the circumferential wall 18 of the vaporization chamber 11, and the bottom insulating material 28 is made of asbestos. The material 29 is made of lithoflex or glass fiber. 30 is a horizontal heat shield plate formed integrally with the upper end of the burner container 26; 31 is a heat shield plate 3 provided with an ignition electrode 31';
The spark plug is installed through the ignition plug 0 and is integrally equipped with a flame detection rod 32.

Reference numeral 33 denotes a combustion tube fixed on the heat shield plate 30, both upper and lower ends of which are open, and the flame port member 22 of the burner 10 is exposed to the lower end. 34 is a rectangular window hole opened in the front part of the combustion tube 33;
The window hole 34 is a heat ray transmitting plate 3 made of a heat-resistant glass plate.
It is closed at 5. 36 is the heat ray transmitting plate 35
A porous heat-resistant metal member that corresponds to the above and is disposed in the combustion tube 33 directly above the flame port member 22, and has a generally horizontally long rectangular shape when viewed from the front and has a vertical cross section that is approximately serrated. It is made of a board, and the left and right support plates 7
It is fixed to the back side of the combustion tube 33 at. 38
39 is a guide plate forming a tapered and inclined combustion gas passage X on the back side of the red-hot member 36, and 39, 39... are secondary air holes formed in a large number at the lower end of the guide plate 38 over the entire horizontal direction, A part of the wind generated by the warm air blower 40 is supplied into the combustion gas passage X through the secondary air supply passage Y through the secondary air holes 39, 39, . . . to promote secondary combustion. Reference numeral 41 denotes a through hole formed in a cover plate 42 provided at the upper part of the combustion gas passage X, and is provided at both left and right ends of the combustion gas passage X.

The warm air blower 40 is installed in the upper back part of the exterior case 43 shown by the phantom line, and the motor 40
Air generated by the blower fan 40b rotating at point a is sent toward the combustion tube 33, and a portion of the air is used as secondary air in the combustion tube to contribute to combustion, and most of the air is sent from the combustion tube 33. It is combined with the outflowing combustion exhaust gas and discharged to the outside from a hot air outlet (not shown). 44 is an upper heat shield plate.

Reference numeral 45 denotes a reflector plate made of a stainless steel plate whose upper surface is mirror-finished at least, and when the heat recovery section 24 of the burner 10 is penetrated, the upper opening of the portion corresponding to the inside of the combustion cylinder 33 of the burner container 26 is opened. It is disposed so as to be covered, and its peripheral edge 45' is fixed to the heat shield plate 30.

Next, the operation of the present invention will be explained. When the liquid fuel and primary combustion air are pumped into the vaporization chamber 11 whose peripheral wall 18 is preheated by the vaporization electric heater 19, the liquid fuel instantly vaporizes and the vaporized gas and combustion air are premixed. The premixed gas flows through the throttle passage 20
It is ejected from the flame port member 22 into the combustion tube 33 through the outlet path 21, where it is ignited by the spark plug 31, forming a line-shaped blue combustion flame 23 on the flame port member 22, and combusts. Then, the combustion gas undergoes secondary combustion in the combustion gas passage X by secondary air,
The red-hot member 36 is heated to a high temperature of about 800° C. to 900° C. to make it red-hot. The red-hot member 36 emits heat rays by becoming red hot, and the heat rays radiated forward pass through the heat ray transmitting plate 35 and perform a heating effect by radiation.

Further, the combustion gas flowing out from the vent 41 and the combustion exhaust gas inside the combustion tube 33 merge with the wind from the hot air blower 40 when flowing out from the upper opening of the combustion tube 33, and the combustion gas flows out from the hot air outlet (not shown). ) to outer case 43
The air is discharged to the outside and creates a heating effect using warm air.

By the way, the heat rays radiated by the red heat of the red-hot member 36 also extend downward, but these downward heat rays are reflected upward by the reflection plate 45, and therefore the heat rays of the red-hot member 36 cause the burner to be housed. The burner container 26 can be prevented from being heated to a high temperature, and the burner container 26 that occurs when the burner container 26 is heated to a high temperature.
The rise in the temperature of the surrounding atmosphere can be reduced, and the surrounding space can be used to prevent damage and destruction of components such as the oil level regulator 12, the electromagnetic pump 15, and its oscillator 14 due to adverse thermal effects.

Moreover, since the burner 10 is housed in the burner container 26 and heat insulating materials 28 and 29 are interposed between the burner container 26 and the peripheral wall 18 of the vaporization chamber 11, the vaporization electricity is not used at the time of ignition. The heat of the peripheral wall portion 18 heated by the heater 19 is difficult to dissipate to the surroundings, and the peripheral wall portion 18 of the vaporization chamber 11 can rise to the vaporization temperature of the liquid fuel in a short time, shortening the ignition waiting time, and at the time of combustion. The temperature of the heated peripheral wall 18 can be well maintained by conduction of heat from the heat recovery section 24 heated to a high temperature by the combustion flame 23, and the time during which electricity is applied to the vaporizing electric heater 19 can be reduced, thereby saving power.

In addition, FIG. 4 is a detailed cross-sectional view of a main part explaining another embodiment of the reflector 45, in which the reflector 45 faces outward and diagonally upward with respect to the burner 10 in order to perform the reflection action more efficiently. A reflecting surface portion is formed which is inclined at a angle of .

(f) Effects of the invention Since the radiant combustion appliance according to the invention is constructed as described above, it has the following effects.

A burner that vaporizes liquid fuel in a vaporization chamber and burns a premixed gas of the vaporized gas and combustion air on a flame port member is housed in a bottomed cylindrical burner container, and the burner container and the vaporization chamber are Since the heat insulating material is interposed in the space between the burner and the peripheral wall, the heat retention of the burner can be improved, the ignition waiting time can be shortened, and the electric power of the vaporizing electric heater can be saved.

Since the upper opening of the burner container is covered with a reflector made of a stainless steel plate, it is possible to reflect the heat rays emitted downward from the red-hot member and prevent the burner container from becoming hot. It is possible to prevent adverse thermal effects on components placed under the ambient temperature of the device.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a radiant combustion appliance showing an embodiment of the present invention, Fig. 2 is a vertical sectional view of Fig. 1, Fig. 3 is a detailed sectional view of the main part of Fig. 2, and Fig. 4 FIG. 2 is a detailed sectional view of a main part showing another embodiment. DESCRIPTION OF SYMBOLS 10... Burner, 11... Vaporization chamber, 18... Peripheral wall part, 19... Electric heater for vaporization, 22... Flame mouth member, 25... Temperature detector, 26... Burner container, 28, 29... ...Insulating material, 36...Red-emitting member,
45...Reflector.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A burner that vaporizes liquid fuel in a vaporization chamber and burns a premixed gas of the vaporized gas and combustion air on a burner port member, and a burner that faces the burner port member. a combustion tube, and a red-hot member disposed within the combustion tube and heated by the combustion gas of the burner, and a vaporization electric heater that heats a peripheral wall of the vaporization chamber is controlled by a temperature detector. The burner is housed in a cylindrical burner container with a bottom, and a heat insulating material is interposed between the burner container and the peripheral wall of the vaporization chamber, and further A radiant combustion appliance in which the upper opening of the burner container is covered with a reflector made of a stainless steel plate. (2) The radiant combustion appliance according to claim 1, wherein the reflecting plate is provided with a reflecting surface portion that faces outward with respect to the burner and slopes obliquely upward.