JPS643960Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a combustion device that performs combustion using combustion air sucked through a filter provided in the combustion device.

[Conventional technology]

Conventionally, as shown in FIG. 1, air outside the frame body a is sucked in through an air supply path d connecting a filter part b provided in the frame body a and a combustion fan c, and is sent to the burner part e as combustion air. The air supply hole device for a kerosene stove is well known and was described in Japanese Utility Model Application Publication No. 1983-46240 before the application of this invention.

A plurality of recesses are provided on the front surface of the filter part b of this air supply hole device. Therefore, even if the recesses come into contact with a relatively hard member such as furniture or a wall surface, combustion air is supplied from the recesses and abnormal combustion is prevented. It is intended to prevent

[Problem that the invention attempts to solve]

By the way, in the conventional air supply hole device described above, combustion air can be supplied even if the recess comes into contact with a relatively hard member, but if it comes into contact with a flexible member such as a curtain or clothing, the air from the recess Curtains and clothing are sucked in by the suction force and the recess is blocked.

Furthermore, even if combustion air can be supplied from the recess, if the filter part b becomes clogged with cotton dust or dirt, the supply of combustion air will be stopped, causing abnormal combustion such as standing flames or misfires. , it still wasn't good enough.

[Means for solving problems]

Therefore, in order to eliminate the above-mentioned conventional drawbacks, this invention provides a filter in a through hole drilled in a suitable position in the frame, and communicates the filter portion with a fan casing 7 provided in the frame through a ventilation pipe, thereby discharging combustion air. The combustion device for supplying gas to the burner section is characterized in that the communication pipe is provided with an auxiliary intake section in the middle or at the end thereof, which is shaped like a doughnut and is made of a soft material having a higher air permeability than the filter section. This relates to combustion equipment.

[Effect]

When the well-known combustion operation is performed, the combustion fan 6 starts,
Air outside the frame body 13 is supplied to the filter section 11, the ventilation pipe 15, the fan casing 7, and the combustion burner section 2 for combustion, but at this time no air is taken in from the auxiliary intake section 18.

In this state, if the filter section 11 becomes clogged due to a defect in the installation conditions of the combustion device or other factors such as curtains, clothing, or garbage, the ventilation pipe 15
Combustion air is sucked in from the auxiliary intake section 18 having ventilation and is supplied to the combustion burner section 2.
Therefore, combustion can be continued.

〔Example〕

1 is a pot-shaped and relatively thick vaporizing chamber, which has a burner part 2 at the top and a flame port 3 on the side, and a heating heater 4 for heating to a temperature of 200 to 240 degrees outside the bottom. It is located at the bottom of Building 5.

A combustion fan 6 is a turbo fan housed in a fan casing 7, connected to a fan motor 9 via a support shaft 8, and supplies combustion air to the vaporization chamber 1.

An inlet 1 is provided in the center of the fan casing 7.
0, and a filter section 11 is provided at the inlet 10.
A ventilation pipe 15 made of plastic is connected to an intake port 12 at one end equipped with a through hole 14 bored at an appropriate position in the frame 13, and outside air outside the frame 13 is passed through the ventilation pipe 1.
An air supply passage 16 is formed to suck air through the combustion chamber 5, and the combustion air after suction is supplied to the burner section 2 through an air blow passage 17.

Also, between the air supply path 16 and the inflow port 10 of the fan casing 7, there is a donut, which has one side bonded to the fan casing 7 and the other side abutted against the end surface of the ventilation pipe 15. The auxiliary air intake section 18 is made of a soft material with air permeability such as ester-based polyurethane foam. Combustion air is supplied through a breathable auxiliary intake section 18.

On the other hand, the tip of the above-mentioned air blowing passage 17 forms a tapered nozzle part 19 to look into the vaporization chamber 1, and the part in the middle is divided into two parts or bypassed at an appropriate area ratio. The other branch 22 is equipped with a valve mechanism 21 such as a solenoid valve that opens and closes when energization is stopped, and the branch pipe 23 is communicated with and extended from a flat part with no unevenness in the circular diameter, and each branch 20, 22 are merging.

Further, the opening and closing of the valve mechanism 21 is controlled by the set temperature of a sensor 24 such as a room thermostat that detects the temperature in the room.

Further, the branch pipe 23 is opened while supplying fuel in a metering oil level device 25 communicating with a fuel tank (not shown), and the air pressure in the air passage 17 is applied as static pressure onto the fuel.

Reference numeral 26 denotes a fuel injection nozzle which communicates with the metering oil level gauge 25 and has a solenoid valve 27 interposed in the middle, and whose tip looks into the vaporizing chamber 1 to eject an amount corresponding to the static pressure loaded on the metering oil level gauge 25. of fuel in the form of mist or granules.

The metering oil level gauge 25 includes a valve body 28 that discharges internal pressure when the oil level rises abnormally, a relief port 29 that adjusts pressure fluctuations when the thermal power is switched from large to small, and a metering holding valve 30. In addition, the oil level is located at the same level as or slightly below the fuel injection nozzle 26.

31 is the igniter, 32 is the flame sensor.

This embodiment of the invention is constructed as described above, and by performing a well-known combustion operation, the heating heater 4 generates heat, and the temperature of the vaporizing chamber 1 is raised to a set temperature.

After several minutes have elapsed, the vaporization chamber 1 reaches the set temperature, and at the same time it stops generating heat, the solenoid valve 27 opens and the igniter 31 starts discharging fireworks.

Next, the fan motor 7 is started and the combustion fan 6 starts rotating.

Due to this rotation, the air outside the frame 13 is cleaned of dust and the like by the filter section 11, flows into the ventilation pipe 15 through the intake port 12, and further flows into the fan casing 7 through the ventilation pipe 15. From here, air passage 1
Air is blown at 7.

Therefore, most of the combustion air that has flowed into the blower passage 17 is directly supplied into the vaporization chamber 1 and is also supplied to the shunt passage 22.
A part of the combustion air circulating through the branch pipe 23 applies static pressure to the metering oil level gauge 25, and fuel according to this load is jetted out from the fuel injection nozzle 26 to become vaporized gas, which is then supplied first. The combustion air is premixed with the combustion air that is being used, and then supplied to the burner section 2 for combustion.

Next, if the intake port 12 is blocked due to the filter section 11 being clogged with furniture, walls, curtains, clothing, or garbage, there is a donut-shaped part in the middle or end of the ventilation pipe 15 that provides ventilation resistance from the filter section 11. Since the auxiliary intake section 18 made of a soft material with high air permeability is provided, combustion air is sucked through the auxiliary intake section 18, flows into the fan casing 7, and is supplied to the burner section 2. Since it is made of a material, it does not cause abnormal combustion such as standing flames or misfires, and can always maintain good combustion over a long period of time, and the auxiliary intake part 18 is made of a soft material with breathability. Therefore, the inflow of dust, etc. is prevented and only clean combustion air is supplied through the auxiliary intake part 18, and the air passage 1 is
The combustion fan 7 is not blocked and causes abnormal combustion, and a good combustion air is supplied.Moreover, the drive vibration of the combustion fan 6 can be absorbed by the auxiliary intake part 18 made of a soft material. It is also possible to prevent this vibration from being transmitted to the frame 13 via the ventilation pipe 15.

[Effect of idea]

As described above, according to this invention, the filter 11 is provided in the through hole 14 bored at an appropriate position in the frame 13, and the filter portion 11 and the fan casing 7 provided in the frame 13 are communicated with each other through the ventilation pipe 15 for combustion. In the combustion device that supplies air to the burner section 2, an auxiliary intake section 18 is provided in the middle or at the end of the communication pipe 15, which is shaped like a doughnut and is made of a soft material having a higher air permeability than the filter section 11. Therefore, even if the filter section is blocked by hard furniture or walls, flexible curtains, clothing, cotton dust, dirt, etc., the combustion air will not be blocked. Since the filter section is blocked like in the past, combustion air cannot be supplied to the burner section, and there are no problems such as abnormal combustion such as standing flames or misfires, which improves safety. It can be improved.

Moreover, the installation location of the combustion device is not limited to a place where a wide space can be maintained around the combustion device to prevent the filter from clogging, and it can be easily installed and used anywhere, making it extremely convenient to use. .

Furthermore, since the auxiliary intake part is made of a soft material with breathability, it also serves as a second filter when the filter part is blocked, and clean air from which dust has been removed is sent to the burner part as combustion air. It can be supplied without any negative effect on combustion.
Moreover, they usually have various advantages such as absorbing the drive vibration of the combustion fan and reliably preventing it from being transmitted to the frame.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing a conventional example, FIG. 2 is a simplified sectional view of a combustion device showing an embodiment of this invention, and FIG. 3 is an enlarged sectional view of the same essential part. 2...Burner part, 6...Combustion fan, 7...Fan casing, 11...Filter part, 13...
...Frame body, 16...Air supply path, 18...Auxiliary air intake section.

Claims (1)

[Scope of utility model registration request] Filter 1 is inserted into the opening 14 drilled in the appropriate place in the frame 13.
1, the filter part 11 and the fan casing 7 provided in the frame body 13 are connected through a ventilation pipe 15, and combustion air is supplied to the burner part 2. A combustion device characterized in that an auxiliary intake section 18 is provided at an end portion in a donut shape and made of a soft material having air permeability greater than that of a filter section 11.