JPH0539285Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is an oil or gas combustion heating appliance, in particular, which burns oil or gas fuel and generates hot air from the combustion exhaust together with the air taken into the device. The present invention relates to an improvement of a combustion heating appliance of a hot air blowing type without a so-called heat exchange device, in which hot air is blown out of the vessel.

[Prior art]

Combustion heating appliances that blow hot air without a heat exchange device, such as those mentioned above, are known as oil fan heaters or gas fan heaters, and have been used as heating means with excellent thermal efficiency. The instrument is generally constructed as shown in FIG. That is, as shown in the same figure, a combustion section D is provided in a vessel C having an air intake port A and a hot air outlet B, and petroleum fuel or gas fuel is combusted in this combustion section D. At the same time, the air taken into the vessel C from the outside through the intake port A is heated, and the air is mixed with the combustion exhaust from the combustion section D, and this is sent outside the vessel C through the above-mentioned outlet B. It is configured to blow out warm air. In that case, a blowing fan E is arranged near the air intake port A in the vessel C, and the air taken into the vessel C by the fan E is sent to the combustion part D side. Warm air is blown out of the container C from the air outlet B located on the opposite side of the fan E across the section D.

Incidentally, combustion heating appliances such as those mentioned above have the advantage of superior combustion efficiency compared to ordinary kerosene stoves, etc., but on the other hand, they emit nitrogen oxides (NOx) and carbon monoxide contained in the combustion exhaust. Since unburned gas components that are undesirable for health such as (CO) or sulfur dioxide (SO ₂ ) are discharged to the outside of the vessel along with the hot air, there is a disadvantage that the air inside the room is polluted. Therefore, in order to solve this problem, it has been proposed to install a catalyst device for removing unburned gas components inside the body of the heating appliance. If the catalytic converter is placed above, there is a possibility that the combustor itself may become hotter than necessary or abnormal combustion may occur due to poor ventilation of the catalytic device. In order to deal with this, for example, JP
As shown in FIG. 2 of Japanese Patent No. 151559, a catalyst device may be disposed near the hot air outlet, and the unburned gas components may be removed when the hot air passes through the catalyst device.

[Problem that the invention attempts to solve]

However, in conventional hot air blowing type combustion heating appliances, when the catalyst device is placed near the hot air outlet as described above, the air is sent from the combustion section side to the catalyst device side by the blower fan. When the hot air passes through the catalyst device, the device acts as a resistance and the force of the hot air inevitably decreases.
Therefore, in order to overcome the pressure loss caused by such a catalyst device and blow hot air out of the container from the outlet, it is necessary to make the pressure inside the container higher than that outside the container. In this case, combustion air and fuel must be pumped to the combustion section within the vessel at a higher pressure than when the catalyst device is not provided, and as a result,
It becomes necessary to provide equipment for applying the pressure, or to take new measures to improve the airtightness of the vessel.

This invention addresses the above-mentioned actual situation regarding conventional hot air blowing type combustion heating appliances, and is capable of effectively removing unburned gas components harmful to the human body such as NOx and CO. It is an object of the present invention to provide a combustion heating appliance with a relatively simple configuration that does not require equipment for applying pressure to air and fuel.

[Structure of the idea]

That is, the oil or gas combustion heating appliance according to the present invention has an air intake port and a hot air outlet provided at the rear and front parts of a box-shaped container body, and has oil or gas combustion inside the container body. The combustion section is equipped with a combustion section that burns the fuel, and after the air taken into the container body from outside the container body through the above-mentioned intake port is heated by the above-mentioned combustion section, the heated air is sent from the above-mentioned outlet to the outside of the container body together with the combustion gas. An oil or gas combustion heating appliance that blows out air as air, the air outlet being located at the upper part of a partition plate that separates a chamber next to the combustion part in the container body and a front chamber next to the hot air outlet. A catalyst body for purifying unburned components in the combustion gas is disposed in the hot air passage formed with an area approximately corresponding to the size of the mouth, and a negative pressure is provided across the combustion section in the front chamber. It is characterized by being equipped with a fan that generates.

[Effect]

According to the above configuration, negative pressure is generated inside the vessel as the fan installed near the hot air outlet in the body of the combustion heating appliance rotates. Air flows into the combustion chamber, the air is heated by the combustion section, and
Mixed with high temperature combustion gas generated from the combustion part,
Thereafter, the heated air is blown out of the container via the fan and the hot air outlet. In that case, in the above-mentioned body, a partition plate is formed approximately corresponding to the size of the above-mentioned air outlet at the upper position of the partition plate provided upstream of the fan between the combustion section side chamber and the hot air outlet. Since the catalyst device is placed in the hot air passage path, the combustion gas is diluted with air and then passes through the catalyst device under negative pressure from the fan, preventing early deterioration of the catalyst body and removing unburned gas. can be stably purified over a long period of time.
In addition, in the above configuration, by generating negative pressure inside the container with a fan, air is taken into the container and discharged outside the container as warm air, so the catalyst device is installed near the hot air outlet. This means that there is no need to provide equipment that would be required if a combustion engine were installed, that is, equipment for applying pressure to combustion air and fuel.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the combustion heating appliance 1 has a combustion part 3 located approximately in the center of a box-shaped container body 2.
In addition, an air intake 4 is provided on the rear surface (right side in the drawing) 2a of the container body 2, and an air intake port 4 is provided in the front surface (left side in the drawing).
The hot air outlet 5 is formed in each of the hot air outlets 2b. Further, a fuel storage section (not shown) is separately provided in the vessel body 2, and fuel appropriately supplied from the storage section is combusted in the combustion section 3. In this case, petroleum fuel is used in this embodiment, and the structure is such that it is once gasified by a vaporizer or the like in the combustion section 3 and then combusted, but the present invention is not limited to this. Instead, it is also possible to configure the heater to suck up petroleum fuel etc. with a wick and burn it, for example, like a normal petroleum stove. Further, instead of the above-mentioned petroleum fuel, a gas fuel such as city gas may be used.

However, inside the vessel body 2 of the combustion heating appliance 1,
The front surface 2 of the container is located near the hot air outlet 5.
A fan 6 is arranged approximately parallel to b, and
A catalyst device 7 is installed between the fan 6 and the combustion section 3. Among them, the fan 6 is connected to the motor 8
By generating negative pressure in the chamber 2c side of the chamber 2 in which the combustion section 3 is located, air is taken into the chamber 2 from outside the chamber 2 through the air intake port 4. , after heating this in the combustion section 3 and mixing it with combustion gas,
Suction into the front chamber 2d at the front of the catalyst device 7,
Warm air is blown out of the container body 2 from the hot air outlet 5. 2e is a chamber 2c in which the combustion section 3 is located and a front chamber 2 next to the outlet 5;
d, and a passage path 2f for hot air from the fan is formed in the upper part of the partition plate with an area approximately corresponding to the size of the air outlet 5.

On the other hand, the catalyst device 7 is inserted through the insertion port 9a provided on the outer surface of the container body 2, and
The catalytic converter is mounted on a catalytic device mounting portion 9 disposed on the hot air passage path 2f inside the catalytic converter. Now, to explain this catalyst device 7 in more detail, as shown in FIG.
It consists of a heat-resistant container 10 formed into a box shape and a catalyst body 11 held within the container 10. Among them, the catalyst body 11 is comprised of a large number of granular carriers 11a, as shown in an enlarged view in FIG.
Since the noble metal oxidation catalyst 11b, such as platinum or palladium, is supported on the surface of the catalyst body 11a, when the hot air passes through the catalyst body 11, NOx and other substances contained in the hot air are removed. It is now possible to purify harmful unburned gas components such as CO. In that case, activated carbon, activated alumina, etc. are used as the carriers 11a...11a, but since these types of carriers 11a...11a have a large active internal surface area, the amount of catalyst supported can be increased, and thus This has the advantage of increasing the purification efficiency for unburned gas components. Further, the porous opposing surface 10a of the heat-resistant container 10...10a
In the illustrated example, the surface 10a is formed flat, but the surface 10a may be raised outward in a mountain shape or bent in an uneven shape in the inner and outer directions for the purpose of expanding the contact area with the hot air. good. Furthermore, in this embodiment, the catalyst body 11 is housed in a wire mesh 12 as shown in FIG. This is to facilitate the filling and to prevent the catalyst body 11 from dissipating after filling.

Incidentally, as shown in FIG. 1, the container body 2 in the above embodiment is provided with a filter mounting portion 13 adjacent to the catalyst device mounting portion 9, and the filter mounting portion 13 is provided through the insertion port 13a on the outer peripheral surface of the container. A dust removal filter 14 inserted in the hot air removes dust from the hot air, thereby preventing deterioration of the catalyst function due to clogging of the catalyst body 11 and improving the service life. etc. are being planned.

According to the above configuration, when the ignition device (not shown) separately provided in the combustion heating appliance 1 is activated to ignite the fuel in the combustion section 3, combustion is started in the combustion section 3 and The fan 6 in the vessel body 2 is driven by the motor 8 in succession, but in this case, the fan 6 is rotated in a direction to send the gas from the combustion section 3 side to the hot air outlet 5 side. As a result, negative pressure is generated in the chamber 2c on the combustion section 3 side within the vessel body 2. As a result, air flows into the vessel body 2 from the outside through the air intake port 4, mixes with the combustion gas from the combustion section 3, is heated, and is then drawn into the fan 6 side as warm air. After that, the container body 2 is finally discharged through the hot air outlet 5.
However, at this time, if the warm air is discharged as it is from the air outlet 5 to the outside of the container 2, the hot air contains unburned NOx, CO, etc. that are harmful to the human body. Since gas components are included, the interior of the living space will be contaminated by these.
However, according to the above configuration, since the catalyst device 7 is disposed in the hot air passage path 2f between the combustion section 3 and the fan 6 in the container body 2, this catalyst device 7
When the hot air passes through, unburned gas components in the hot air are purified by the catalyst device 7. As a result, clean warm air that does not contain the unburned gas components that are harmful to the human body is blown out from the outlet, thereby preventing the unburned gas components from contaminating the living space.

In addition, when the catalyst device 7 is provided in the hot air passage path in the vessel body 2 as described above, conventionally, the pressure loss caused by this type of device 7 can be overcome and the air flows from the chamber 2c on the combustion section 3 side. Since the hot air had to be force-fed toward the chamber 2d on the back side of the catalyst device 7, it was necessary to separately provide equipment for applying pressure. Since the fan 6 provided near the port 5 is configured to generate negative pressure in the chamber 2c on the combustion section 3 side in the vessel body 2, there is no need to provide equipment for applying pressure as described above. However, the hot air can be smoothly discharged from the air outlet 5 to the outside of the container body 2, which simplifies the structure and prevents an increase in cost.

Furthermore, since the catalyst device 7 has a box-shaped container and is inserted into the catalyst mounting portion 9 through the insertion port 9a provided on the outer surface of the container body 2,
When replacing the catalyst device 7 when the life of the catalyst 11b...11b has expired or during reactivation processing, the operation can be easily carried out and removed without touching the internal mechanism of the vessel body 2. Since it can be operated easily, the risk of failure is reduced accordingly.

In the above embodiment, the catalytic device 7 was arranged vertically at the upper part of the partition plate 2e between the combustion section 3 and the fan 6 in the vessel body 2.
Like the combustion heating appliance 1″ of the second embodiment shown in the figure,
The catalyst device 7'' may be provided above the combustion section 3'' in the vessel body 2'', and in this state, the fan 6'' may be provided on one side above the catalyst device 7''. In this case, Figs. As shown in FIG. Although it may be formed in the lower part of the vessel body 2'' as shown in the figure, in any of the above configurations, the size of the hot air passage paths 2f', 2f'' in which the catalyst devices 7', 7'' are provided is as follows: The area is limited to the upper part of the partition plates 2e' and 2e'' in the respective vessels 2' and 2''.

Furthermore, in place of the catalyst device 7 in the first embodiment, a catalyst device 7 as shown in FIG. 7 or FIG.
, 7〓 may be used. Among these, the one shown in FIG.
1 has a structure in which filled parts a...a and non-filled parts b...b are arranged alternately. In the structure shown in FIG. 8, a heat-resistant container 10 is filled with catalyst bodies 11, The structure is such that non-filled portions d...d are provided here and there in the filled portion c. According to these configurations, for example, when the filling portions a and c become clogged,
Since the unfilled portions b and d serve as hot air escape routes, it becomes possible to prevent an abnormal temperature rise within the combustion chamber.

Regarding the catalyst body, as shown in FIG. 9, a catalyst body 15 has a structure in which a precious metal oxidation catalyst 15b is supported on a carrier 15a made of a ceramic honeycomb core.
Or, as shown in FIG. 10, noble metal oxidation catalysts 16b...16 are placed on carriers 16a...16a made of fibrous activated carbon.
The catalyst body 16 having a structure in which b is supported, furthermore, the 11th
As shown in the figure, noble metal oxidation catalyst 17b is mounted on carriers 17a...17a made of porous plates made of metal or ceramic.
It is possible to use a catalyst body 17 having a structure in which the catalyst bodies 17b are supported and stacked in such a way that they are not brought into close contact with each other and the holes e...e do not overlap with each other. Among these, the one shown in FIG. 9 has the advantage that pressure loss is small and the effective area of the catalyst body 15 is large. In addition to the advantage that the catalyst body 16 shown in FIG. 10 has a large amount of catalyst supported, the catalyst body 16 shown in FIG.
As the area of contact with warm air increases, the non-woven fabric-like
It has the advantage of being easy to process into various shapes such as textiles and paper. On the other hand, the catalyst body 17 shown in FIG. 11 has a small pressure loss and a large surface area, and the carrier 17a is made of ceramic or the like having excellent heat resistance. As in the second embodiment shown in FIG. 6, the catalyst device 7'' can be placed relatively close to the combustion section 3'',
Accordingly, the drive motor 8'' of the fan 6'' can be placed outside the container body 2'' where the temperature is low, for example.

[Effect of idea]

As described above, according to the present invention, combustion heating is a hot air blowing method in which oil or gas combustion is combusted, and the combustion exhaust gas is mixed with air taken into the container and blown out of the container as warm air. In equipment, NOx and CO contained in the above combustion exhaust
The harmful unburned gas components such as As a result, pollution caused by the unburned gas components is prevented. In particular, according to the present invention, a fan disposed between the combustion section and the hot air outlet in the vessel is configured to generate negative pressure on the combustion section side, and the hot air inside the vessel is The passage path is formed at the upper part of the partition plate that separates the chamber next to the combustion section and the front chamber next to the outlet, with an area roughly corresponding to the size of the outlet, so that the combustion air and fuel are not under pressure. It is possible to efficiently blow out sufficient hot air outside the vessel without the need for additional equipment or devices, and in addition, the catalyst device and fan can be installed as much as possible compared to the size of the vessel. This makes it possible to downsize the heating device and make the entire heating device lighter.

[Brief explanation of the drawing]

1 to 11 show embodiments of the present invention. FIG. 1 is an overall view showing a combustion heating appliance according to the first embodiment, and FIG. 2 is a vertical cross-section showing a single catalyst device in the heating appliance. 3 is an enlarged view of the main parts, FIGS. 4 to 6 are general views similar to FIG. 1 showing other embodiments of the present invention, and FIGS. 7 and 8 are views used in the present invention. FIGS. 9 to 11 are perspective views showing other examples of the catalyst device, and FIGS. 9 to 11 are enlarged sectional views showing other examples of the catalyst body. Moreover, FIG. 12 is a schematic diagram showing a known example of a combustion heating appliance. 1, 1', 1''... Combustion heating appliance, 2, 2',
2″... vessel body, 3, 3', 3″... combustion part, 4,
4'...Air intake, 5,5'...Hot air outlet, 6,6',6''...Fan, 7,7',7'',
7,7〓...Catalyst device, 9...Catalyst device mounting part, 10,10,10〓...Heat-resistant container, 1
1, 11, 11〓, 15, 16, 17...catalyst body, 11a, 15a, 16a, 17a... carrier,
11b, 15b, 16b, 17b...catalyst, 13
...Filter mounting part, 13a...Inlet,
14, 14'...Dust removal filter, b, d
...Void part (unfilled part), e...hole.

Claims (1)

[Scope of utility model registration request] An air intake port and a hot air outlet are provided at the rear and front of the box-shaped container body, and a combustion section for burning fuel made of oil or gas is provided inside the container body, and the above-mentioned intake port An oil or gas combustion heating appliance that heats air taken into the vessel from outside the vessel through the combustion section and then blows it out of the vessel from the outlet as warm air together with combustion gas. At the top of a partition plate that separates a chamber next to the combustion section in the vessel and a front chamber next to the hot air outlet, a warm air is formed with an area approximately corresponding to the size of the outlet. A catalyst body for purifying unburned components in the combustion gas is disposed in the passage of the combustion gas, and a fan is provided in the front chamber to generate negative pressure in the combustion section. or gas-fired space heaters.