JP2004156811A - Combustion room heating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion room heating apparatus of a high heating efficiency with combustion stability without requiring a power source. <P>SOLUTION: An oil stove 1 is provided with a combustion part 2 for burning fuel, and a casing 3 enclosing the combustion part 2 and formed with an opening part 31 for exhausting air containing heat generated at the combustion part 2, frontward from the apparatus. An air blasting part 5 partitioned by a heat conductive partition plate 4 to blast the air containing the heat generated at the combustion part 2, frontward from the oil stove 1 is provided above the combustion part 2. The air blowing part 5 is provided with a thermoelectric conversion module provided on the partition plate 4, and a blower fan electrically connected to the thermoelectric conversion module and driven by electric power generated by the thermoelectric conversion module. The blower fan is disposed on the rear side of the oil stove 1 rather than the thermoelectric transducing module. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a combustion heating device.
[0002]
[Background Art]
BACKGROUND ART Conventionally, as a combustion heating device, an oil stove such as a normal core stove, an oil fan heater, and the like can be mentioned. The core-type stove impregnates a liquid petroleum fuel into a glass core or the like, burns the fuel, and heats the combustion heat in a target direction by radiant heat, directly or by using a reflector. This core-type stove is widely used because it does not require a power supply to transmit heat in a desired direction by radiant heat.
However, the core stove has a problem that not only is it heated only in a specific direction, but convective heat escapes upward, and the heating efficiency in a target direction is low.
[0003]
On the other hand, the petroleum fan heater vaporizes and combusts liquid petroleum fuel and blows warm air by a fan that drives combustion heat by a power supply. This oil fan heater is suitable for heating a wide area for blowing air, and is used very often.
However, the oil fan heater needs a power source for driving the fan in addition to the liquid fuel, and thus has a problem that the installation place is limited.
[0004]
In order to solve the above-mentioned problems of the core stove and the oil fan heater, and the problems of both of them, an electromotive force is generated by a thermoelectric conversion element using combustion heat of the oil stove, and the fan is generated by the generated electromotive force. A technique has been proposed in which the heating efficiency is increased by rotating the heating (see Patent Documents 1 and 2).
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 57-105501 (page 1)
[Patent Document 2]
Japanese Patent No. 1538443 (page 1)
[0006]
[Problems to be solved by the invention]
However, in the technology described in Patent Literature 1, the blowing port is directly in contact with the combustion portion, and combustion is unstable, or the inflow of combustion air is unstable because the thermoelectric element is directly disposed around the fire tray portion. There is a problem with the stability of combustion.
Further, the technique described in Patent Document 2 has a problem that the heating efficiency in a required direction is low because combustion heat rises and escapes.
[0007]
An object of the present invention is to provide a combustion heating device that does not require a power source, has stable combustion, and has high heating efficiency.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a combustion heating device of the present invention includes a combustion section for burning fuel such as petroleum-based liquid fuel and gas fuel, and an air containing the combustion section and containing heat generated in the combustion section. And a housing provided with an opening for discharging to the front of the apparatus, wherein the heat generated by the combustion section is defined by a thermally conductive partition plate above the combustion section. And a blower for sending air containing air to the front of the apparatus, the blower is electrically connected to the thermoelectric conversion module provided on the partition plate, and the power generated by the thermoelectric conversion module. And a blower fan driven by the thermoelectric conversion module, and the blower fan is disposed on the device rear side with respect to the thermoelectric conversion module.
[0009]
According to the present invention, since the partition is formed by the partition plate, no air is blown to the combustion section, so that the combustion in the combustion section can be stabilized.
Further, according to the present invention, the following operation is performed. That is, first, the air heated in the combustion section rises and heats the partition plate portion, exits in front of the opening, and further rises in the room where the heating device is placed. At this time, when the partition plate is heated, the thermoelectric conversion module operates to generate electromotive force, and the blower fan is driven. The wind generated by the driving of the blower fan cools the upper part of the thermoelectric conversion module and then pushes out the heated air rising on the front of the heating device toward the front of the device.
Thereby, the air heated in the combustion unit is discharged to the front of the device by the wind of the blower fan, so that the heated air can be blown in a certain direction to provide an efficient heating device. Further, by employing a thermoelectric conversion module, there is no need to connect to a commercial power supply or the like.
In addition, when the partition plate is heated, the contact surface of the thermoelectric conversion module with the partition plate is heated to a high temperature, and the upper portion of the thermoelectric conversion module is actively cooled by the blower fan, so that the temperature inside the thermoelectric conversion module is reduced. Since the gradient can be increased, the blower fan can be driven by a large electromotive force, and a more efficient heating device can be provided by setting the blow direction to a fixed direction.
[0010]
In the combustion heating device according to the aspect of the invention, it is preferable that the casing has an intake port for taking in outside air formed on a rear surface side and / or a side surface side of the blower fan of the blower unit.
[0011]
According to this, since the upper portion of the thermoelectric conversion module can be cooled by taking in external air from the intake port by driving the blower fan, the temperature gradient in the thermoelectric conversion module can be further increased, and Heating efficiency can be improved.
[0012]
In the combustion heating device of the present invention, the thermoelectric conversion module includes a high-temperature electrode closely contacting the partition plate, a low-temperature electrode disposed opposite to the high-temperature electrode, and a thermoelectric conversion interposed between the two electrodes. It is preferable that a radiation fin is provided on the low-temperature side electrode.
[0013]
According to this, since the low-temperature side electrode is provided with the radiation fins, heat can be radiated from the radiation fins and the low-temperature side electrode can be cooled, so that the temperature difference between the low-temperature side electrode and the high-temperature side electrode is reduced. Since it can be increased, the electromotive force generated by the thermoelectric conversion module can be increased.
[0014]
In the combustion heating device of the present invention, on the partition plate, between the blower fan and the thermoelectric conversion module, a rear end portion is in contact with the partition plate, and a front end portion is located near the low-temperature side electrode. It is preferable to provide a plate-shaped blowing guide.
[0015]
According to this, the blowing guide can prevent the cooling air flowing along the partition plate from being blown to the high-temperature side electrode and guide the cooling air to the low-temperature side electrode, so that the cooling efficiency of the low-temperature side electrode is improved. In addition, the cooling of the high-temperature side electrode is prevented, the power generation efficiency of the thermoelectric conversion module is further improved, and the heating efficiency is further improved.
[0016]
In the combustion heating device of the present invention, the thermoelectric conversion material is preferably an oxide-based or alloy-based thermoelectric conversion material.
[0017]
Here, as materials of the oxide-based thermoelectric conversion element, NaCo ₂ O ₄ , Bi ₂ Sr ₂ Co ₂ Ox-based, Ca ₃ BiCoOx-based, La1-xSrxCoOy-based material, Zn1-xAlxO (x = 0 to 0. 03) based oxide, an in-ZnO based oxide mixed sintered body of _{(in 2 O 3 (ZnO)} x (x = 1~9) and this and _in 2 _{O 3),} and the like. Among these, an In—Zn—O-based oxide is more preferable because it is stable even at high temperatures.
Examples of the alloy-based thermoelectric conversion element materials include Fe-Si-based materials, Co-Sb skutterudite-based materials, and chromel, allomer, and constantan-based materials often used for thermocouples.
Further, a combination of an oxide and an alloy may be used. For example, for an In-Zn-O-based oxide which is an n-type oxide, a combination with a p-type stainless alloy or the like is preferable.
[0018]
According to this, since the thermoelectric conversion material is an oxide-based and / or alloy-based thermoelectric conversion material, it exhibits stable performance even at a high temperature, so that its quality is stable even for long-term use. It can be a combustion heating device.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an oil stove 1 according to one embodiment of the present invention. FIG. 2 shows the inside of the oil stove 1 in an enlarged manner.
As shown in FIG. 1, the oil stove 1 is a combustion heating device that heats a room by burning kerosene, and includes a combustion unit 2 that burns kerosene and a housing 3 that stores the combustion unit 2. ing.
The combustion section 2 is a combustion section of a conventionally known petroleum stove. A core member made of cloth is provided, and the amount of protrusion of the core member can be adjusted by rotating a heating power adjustment knob 23 provided on the front surface of the housing 3.
[0020]
An opening 31 for discharging the air heated by the combustion unit 2 to the front of the oil stove 1 is formed on the left side of the housing 3, and the combustion unit 2 is located at a position where the opening 31 is formed. It is stored.
The opening 31 is covered with a protective guard 32 formed by arranging a plurality of bar-shaped members horizontally at a predetermined pitch on the front side thereof.
Further, a reflecting member 33 is disposed in a concave shape in a portion of the space where the opening 31 is formed on the back side of the combustion section 2, and radiant heat generated in the combustion section 2 is reflected by the reflection member 33. The oil is radiated in the forward direction of the oil stove 1.
The right side portion of the housing 3 is a portion for storing a fuel tank 34 for storing fuel such as kerosene, which is not shown. However, a lid is provided on an upper surface portion of the housing 3, and the lid is opened and closed. By inserting and removing the fuel tank 34, kerosene can be supplied at a position away from the oil stove 1.
[0021]
The space in which the opening 31 of the casing 3 is formed is partitioned by the partition plate 4 above the combustion unit 2, and the space above the partition plate 4 is a blower unit 5.
The air heated in the combustion unit 2 rises and is bent by the partition plate 4, flows along the lower surface of the partition plate 4, is discharged from the opening 31 to the front of the oil stove 1, and further rises. At this time, heat exchange is performed between the heated air and the partition plate 4, and the partition plate 4 is heated.
The partition plate 4 can be made of a normal sheet metal or the like by using a good heat conductive and insulating material such as alumina for the high temperature portion of the thermoelectric conversion module.
[0022]
The blower unit 5 is provided to increase the heating efficiency by sending the heated air discharged from the opening 31 to the front of the oil stove 1 by rotating the fan and discharging warm air in one direction. ing.
As shown in FIG. 2, the blower unit 5 includes a blower fan 51 and a thermoelectric conversion module 52, which are connected by a lead wire 53.
The blower fan 51 is attached to the back plate 35 of the housing 3 and includes a DC-driven motor 511 and a propeller 512 provided on a drive shaft of the motor 511. The attachment position of the blower fan 51 is set so that the propeller 512 does not interfere with the partition plate 4 and blows air to the upper part of the thermoelectric conversion module 52.
In addition, the propeller 512 is preferably a drum-type fan in order to achieve uniform air blowing.
Further, a plurality of slit-shaped intake ports 351 communicating with the outside are formed in the back plate 35. When the blower fan 51 is driven, external air is taken in from the intake ports 351 and blown forward. ing.
[0023]
Further, depending on the case, a blower guide 41 is provided on the partition plate 4 between the blower fan 51 and the thermoelectric conversion module 52.
The air guide 41 is a plate-shaped member whose rear end 411 is in contact with the partition plate 4 and whose front end 412 is located at the low-temperature electrode 562. Is covered.
[0024]
The thermoelectric conversion module 52 is provided on the downstream side in the blowing direction of the blower fan 51, and includes a thermoelectric conversion unit main body 54 that is tightly fixed to the partition plate 4 and a radiation fin 55 provided on the thermoelectric conversion unit main body 54. Have.
The thermoelectric conversion unit main body 54 is a part that converts heat into electricity using the Seebeck effect, and is configured by connecting a plurality of thermoelectric conversion elements in series.
As shown in the schematic diagram of FIG. 3, the thermoelectric conversion element 56 has a cross section in which a p-type thermoelectric conversion material 563 and an n-type thermoelectric conversion material 564 are alternately arranged between a high-temperature electrode 561 and a low-temperature electrode 562. It is configured as an element having a π-type structure.
Alternatively, as shown in FIG. 4, the thermoelectric conversion element 156 may have a structure in which a plurality of adjacent p-type thermoelectric conversion materials 563 are passed by a plurality of n-type thermoelectric conversion materials 564.
The high-temperature side electrode 561 is configured as a conductive pattern that short-circuits the p-type thermoelectric conversion material 563 and the n-type thermoelectric conversion material 564 on the surface of a rectangular alumina plate having substantially the same shape as the thermoelectric conversion unit main body 54 in plan view. Is done.
The low-temperature side electrode 562 is also configured as a conductive pattern that short-circuits the n-type thermoelectric conversion material 564 and the p-type thermoelectric conversion material 563 on the surface of a rectangular alumina plate similar to the high-temperature side electrode 561.
When the p-type thermoelectric conversion material 563 and the n-type thermoelectric conversion material 564 are sandwiched between both alumina plates, the p-type thermoelectric conversion material 563 and the n-type thermoelectric conversion material 564 are connected alternately and connected in series. The electrodes 561 and 562 and the thermoelectric conversion materials 563 and 564 can be bonded and fixed by, for example, brazing or a high-temperature silver paste.
[0025]
The p-type thermoelectric conversion material 563 and the n-type thermoelectric conversion material 564 are configured as rod members having a length dimension L having a cross section having a width dimension W and a height dimension H. In this example, W = 5 mm, H = 5 mm, L = 10 mm.
The p-type thermoelectric conversion material 563 is a material in which holes move as a medium by heating to transfer charges. In this example, the p-type thermoelectric conversion material 563 has a composite metal ratio of La _0.9 Sr _0.1 Co _0.9 Fe _0.1. Manufactured by sintering oxides.
The n-type thermoelectric conversion material 564 is a material in which electrons serve as a medium to transfer electric charges when heated, and in this example, is manufactured by sintering In ₂ Zn ₃ O ₆ oxide.
[0026]
The radiating fins 55 are radiating members that are in close contact with the alumina plate on which the low-temperature side electrodes 562 are formed, and are made of a good heat conductive material such as aluminum. The radiation fin 55 includes a base 551 that is in close contact with the low-temperature-side alumina plate, and a plurality of ridges 552 that are erected on the base 551 and extend in the blowing direction of the blower fan 51.
[0027]
According to the above-described embodiment, the following effects can be obtained.
(1) Since the partition is formed by the partition plate 4, no air is blown to the combustion part 2, so that the combustion in the combustion part 2 can be stabilized.
Further, according to the present invention, the following operation is performed. That is, first, the air heated by the combustion unit 2 rises and heats the partition plate 4 portion, exits in front of the opening 31, and further rises in the room where the oil stove 1 is placed. At this time, when the partition plate 4 is heated, the thermoelectric conversion module 52 operates to generate an electromotive force, and the blower fan 51 is driven. The wind generated by the drive of the blower fan 51 cools the upper part of the thermoelectric conversion module 52 and then pushes the rising heated air on the front surface of the oil stove 1 toward the front of the oil stove 1.
As a result, the air heated in the combustion section 2 is discharged to the front of the oil stove 1 by the wind of the blower fan 51, so that the heated air is blown in a certain direction to obtain an efficient oil stove 1. Can be. Further, by employing the thermoelectric conversion module 52, there is no need to connect to a commercial power supply or the like.
In addition, when the partition plate 4 is heated, the contact surface of the thermoelectric conversion module 52 with the partition plate 4 is heated to a high temperature, and the upper portion of the thermoelectric conversion module 52 is actively cooled by the blower fan 51, so that the thermoelectric conversion module 52 is cooled. Since the temperature gradient in the conversion module 52 can be made large, the blower fan 51 can be driven with a large electromotive force, and the oil blowing stove 1 can be made more efficient by setting the blowing direction to a fixed direction. .
[0028]
(2) Since the upper portion of the thermoelectric conversion module 52 can be cooled by taking in external air from the intake port 351 by driving the blower fan 51, the temperature gradient in the thermoelectric conversion module 52 can be further increased, and Heating efficiency can be improved.
[0029]
(3) Since the low-temperature side electrode 562 is provided with the radiation fins 55, heat can be radiated from the radiation fins 55 and the low-temperature side electrode 562 can be cooled. Can be increased, so that the electromotive force generated by the thermoelectric conversion module 52 can be increased.
[0030]
(4) Since the cooling air flowing along the partition plate 4 can be prevented from being blown to the high-temperature side electrode 561 and guided to the low-temperature side electrode 562 by the blowing guide 41, the cooling efficiency of the low-temperature side electrode 562 can be improved. And the cooling of the high-temperature side electrode 561 is prevented, the power generation efficiency of the thermoelectric conversion module 52 is further improved, and the heating efficiency is further improved.
[0031]
(5) Since the thermoelectric conversion materials 563 and 564 are oxide-based and alloy-based thermoelectric conversion materials, the oxide-based and alloy-based thermoelectric conversion materials exhibit stable performance even at high temperatures. Can be used as the oil stove 1 with stable quality.
[0032]
Note that the present invention is not limited to the above-described embodiment, and modifications and improvements as long as the object of the present invention can be achieved are included in the present invention.
For example, in the embodiment, a composite metal oxide of La _0.9 Sr _0.1 Co _0.9 Fe _0.1 is used as the p-type thermoelectric conversion material 563, and the n-type thermoelectric conversion material 564 is Although In ₂ Zn ₃ O ₆ oxide is employed, the invention is not limited to this, and another material may be used.
For example, as a material for an oxide-based thermoelectric conversion element, NaCo ₂ O ₄ , Bi ₂ Sr ₂ Co ₂ Ox-based, Ca ₃ BiCoOx-based, La1-xSrxCoOy-based material, Zn1-xAlxO (x = 0 to 0.03) ) based oxide, an in-ZnO based oxide mixed sintered body of _{(in 2 O 3 (ZnO)} x (x = 1~9) and this and _in 2 _{O 3),} and the like.
Examples of the alloy-based thermoelectric conversion element materials include Fe-Si-based materials, Co-Sb skutterudite-based materials, and chromel, allomer, and constantan-based materials often used for thermocouples. Further, a combination of an oxide and an alloy may be used.
Further, in the case of a crossing type element, a crossing electrode can be formed using a metal or an alloy having good formability.
[0033]
In the above-described embodiment, the radiation fin 55 includes the base 551 and the plurality of protruding ridges 552 erected on the base 551 and extending in the blowing direction of the blower fan 51. However, the present invention is not limited to this, and a member having a plurality of rod-shaped members protruding in the out-of-plane direction of the base may be adopted.
[0034]
In the above-described embodiment, the housing 3 is formed with the intake port 351 for taking in outside air on the back side of the blower fan 51 of the blower unit 5. However, the present invention is not limited to this. Alternatively, it may be formed on both the back surface and the side surface.
In addition, specific structures, shapes, and the like when the present invention is implemented may be other structures and the like as long as the object of the present invention can be achieved.
[0035]
【The invention's effect】
According to the present invention, since the partition is formed by the partition plate, no air is blown to the combustion section, so that combustion in the combustion section can be stabilized.
Further, first, the air heated in the combustion section rises and heats the partition plate portion, exits in front of the opening, and further rises in the room where the heating device is placed. At this time, when the partition plate is heated, the thermoelectric conversion module operates to generate electromotive force, and the blower fan is driven. The wind generated by the driving of the blower fan cools the upper part of the thermoelectric conversion module and then pushes out the heated air rising on the front of the heating device toward the front of the device.
Thereby, the air heated in the combustion section is discharged to the front of the device by the wind of the blower fan, so that the heated air can be blown in a certain direction to provide an efficient heating device. Further, by employing a thermoelectric conversion module, there is no need to connect to a commercial power supply or the like.
In addition, when the partition plate is heated, the contact surface of the thermoelectric conversion module with the partition plate is heated to a high temperature, and the upper portion of the thermoelectric conversion module is actively cooled by the blower fan, so that the temperature inside the thermoelectric conversion module is reduced. Since the gradient can be made large, the blower fan can be driven by a large electromotive force, and a more efficient heating device can be provided by setting the blow direction to a fixed direction.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an oil stove according to an embodiment of the present invention.
FIG. 2 is a diagram showing a main part of the oil stove in the embodiment of FIG.
FIG. 3 is a schematic diagram of a thermoelectric conversion element in the embodiment of FIG.
FIG. 4 is a schematic view of a modification of the thermoelectric conversion element.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 oil stove 2 combustion unit 3 housing 4 partition plate 5 blowing unit 31 opening 41 blowing guide 51 blowing fan 52 thermoelectric conversion module 55 radiating fin 351 inlet 411 rear end 412 front end 561 high-temperature electrode 562 low temperature Side electrode 563 p-type thermoelectric conversion material 564 n-type thermoelectric conversion material

Claims (6)

A housing in which a combustion section for burning fuel such as petroleum-based liquid fuel or gas fuel, and an opening for accommodating the combustion section and discharging air containing heat generated in the combustion section to the front of the device are formed. A combustion heating device comprising:
A blower section formed by a thermally conductive partition plate above the combustion section and sending air containing heat generated in the combustion section to the front of the apparatus,
The blower includes a thermoelectric conversion module provided on the partition plate, and a blower fan electrically connected to the thermoelectric conversion module and driven by electric power generated by the thermoelectric conversion module,
The blower fan is disposed on the rear side of the device with respect to the thermoelectric conversion module. The combustion heating device according to claim 1,
A combustion heating device, wherein an intake port for taking in outside air is formed in the housing on a rear side and / or a side side of the blower fan of the blower section. In the combustion heating apparatus according to claim 1 or claim 2,
The thermoelectric conversion module includes a high-temperature-side electrode that is in close contact with the partition plate, a low-temperature-side electrode that is disposed to face the high-temperature-side electrode, and a thermoelectric conversion material that is interposed between the two electrodes.
A combustion heating device, wherein a radiation fin is provided on the low-temperature side electrode. The combustion heating device according to claim 3,
On the partition plate, between the blower fan and the thermoelectric conversion module, a plate-shaped blower guide is provided in which a rear end portion is in contact with the partition plate, and a front end portion is located near the low-temperature side electrode. A combustion heating device characterized by being used. In the combustion heating device according to claim 3 or 4,
The combustion heating device, wherein the thermoelectric conversion material is an oxide-based or alloy-based thermoelectric conversion material. The combustion heating device according to claim 5,
The combustion heating device, wherein the thermoelectric conversion material is an In-Zn-O-based oxide.

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