KR20160120821A - Closed pallet fireplace for heating and hot water boiler - Google Patents

Closed pallet fireplace for heating and hot water boiler Download PDF

Info

Publication number
KR20160120821A
KR20160120821A KR1020150049492A KR20150049492A KR20160120821A KR 20160120821 A KR20160120821 A KR 20160120821A KR 1020150049492 A KR1020150049492 A KR 1020150049492A KR 20150049492 A KR20150049492 A KR 20150049492A KR 20160120821 A KR20160120821 A KR 20160120821A
Authority
KR
South Korea
Prior art keywords
combustion
fireplace
hot water
combustion chamber
fuel
Prior art date
Application number
KR1020150049492A
Other languages
Korean (ko)
Inventor
구재황
Original Assignee
금호하이텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 금호하이텍 주식회사 filed Critical 금호하이텍 주식회사
Priority to KR1020150049492A priority Critical patent/KR20160120821A/en
Publication of KR20160120821A publication Critical patent/KR20160120821A/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24BDOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00Stoves or ranges
    • F24B1/18Stoves with open fires, e.g. fireplaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24BDOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00Stoves or ranges
    • F24B1/18Stoves with open fires, e.g. fireplaces
    • F24B1/183Stoves with open fires, e.g. fireplaces with additional provisions for heating water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24BDOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00Stoves or ranges
    • F24B1/18Stoves with open fires, e.g. fireplaces
    • F24B1/185Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
    • F24B1/188Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas  

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)

Abstract

The present invention relates to a heating and hot water boiler for supplying oxygen required for combustion in a fireplace from the outside to prevent the toxic gas from being introduced into the room and to selectively and simultaneously combine floor and outdoor heating by the generation of hot water by the combustion heat It provides an enclosed pallet fireplace. According to a preferred embodiment of the present invention, there is provided a fireplace comprising: a firebox outer housing having a lower intake passage at an inner lower side thereof; An inlet pipe having a plurality of intake holes formed on an upper surface of the enclosure outside the fireplace and connected to the lower intake passage so as to pass through the ceiling or wall of the room and upwardly installed at a predetermined height to introduce outside air required for combustion; A combustion chamber for combustion having a combustion chamber in which the fuel is burnt, an air inlet communicating with the combustion chamber, an air inlet for discharging the air, a combustor mechanism for discharging the combusted gas, and a fuel inlet for injecting fuel into the combustion chamber, ; Fuel supply means installed in the enclosure outside the fireplace to supply fuel to the combustion chamber; An intake air blower for sucking air introduced through the intake pipe and supplying air required for combustion to the combustion chamber; A hot water supply chamber for storing a predetermined amount of water between the inner casing for combustion and the outer casing of the fireplace to generate hot water by the combustion heat generated in the combustion chamber; And a combustion exhaust pipe connected to the combustor mechanism and having one end connected to the intake pipe and the other end passing through the inside of the intake pipe to leave the room.

Description

{Closed pallet fireplace for heating and hot water boiler}

In particular, the present invention relates to a pallet fireplace for enclosure, and more particularly, to a fireplace for a ventilating pallet, in which oxygen necessary for burning in a fireplace is supplied from the outside and is safely protected by intrinsically shutting off the inflow of toxic gas, Which is combined with a heating hot water boiler so as to be able to be combined at the same time.

Generally, a fireplace is a heating system that is installed inside a living room such as a living room to raise indoor air. As a result, the heating purpose can be achieved by continuously supplying fossil fuel such as wood and the heat is leaked through the smoke passage to the outside. Despite the low heating system, it is possible to produce a warm and atmospheric indoor environment, which is widely used in suburban houses, villas, and vinyl cultivation houses.

Fireplaces and boilers that use fossil fuels indoors not only burn indoor air (oxygen) but also harm the body due to toxic gases such as carbon monoxide, which causes safety problems. In addition, there is a disadvantage in that it is not efficient for outdoor heating because it is equipped with heating water at the upper part and is heated by the radiant heat only in the fireplace.

As a background of the present invention, Korean Patent Registration No. 10-0454558 (a fireplace and a heating apparatus employing the same) is provided with a combustion furnace body in which a combustion space and fired smoke are exhausted and a first passage is formed at one side thereof, A heating water storage tank contacting the outer wall of the combustion furnace body to form a heating water storage space together with the outer wall thereof and communicating with the first passage, a water supply pipe for supplying heating water to the heating water storage tank, And an upper cover which forms an upper space in contact with the upper surface of the combustion furnace body and the upper surface of the heating water storage tank and has a second passage communicating with the other space of the combustion furnace body and communicating with the upper space, .

This background art can be used as hot water for living using the heat of a fireplace, and a hot water storage tank is formed so as to contact the outer circumferential surface of the fireplace to obtain hot water.

However, the background art of the former is that the air (oxygen) necessary for combustion in the fireplace is supplied from the inside of the room, so toxic gas leaks to the inside of the room through this portion, and safety is deteriorated.

Korean Patent Registration No. 10-0913579 (anthracite fireplace) is proposed as another background art of the present invention. A main body having a combustion chamber in which a combustion chamber fuel inlet through which fuel is introduced is formed at an upper portion thereof and a soft material storage chamber in which a combustion material burnt in the combustion chamber is stored, A fuel reservoir provided in the main body and formed with a fuel injection port for injecting fuel into one side and a fuel discharge port communicating with the combustion chamber fuel inlet port on the other side; Fuel supply means provided at a portion where the combustion chamber fuel inlet and the fuel outlet communicate with each other to supply the fuel discharged from the fuel outlet to the combustion chamber; A stove provided horizontally so as to divide the combustion chamber and the soft material storage chamber at the lower end of the combustion chamber fuel inlet port and horizontally arranged so that the entire bottom surface where the fuel supplied by the fuel supply means is burnt and combusted; And a guide plate extending from the upper end of the combustion chamber fuel inlet to a side of the combustion chamber for a predetermined length to prevent the combustion fuel in the stove from being discharged to the combustion chamber fuel inlet side.

This latter technique has the advantage that the fuel is automatically supplied to the combustion chamber without any unnecessary fuel loss, but the fire of the combustion chamber is prevented from being transferred to the fuel of the combustion passage, thereby avoiding the risk of fire.

However, the latter background technology has a disadvantage in that it can not be heated on the floor or in the room by using hot water when the heating is performed only by the radiant heat.

U Korean Patent Registration No. 10-0454558 (fireplace and heating device employing it) Korean Registered Patent Registration No. 10-0913579 (Anthracite fireplace)

The present invention relates to a heating and hot water boiler for supplying oxygen required for combustion in a fireplace from the outside to prevent the toxic gas from being introduced into the room and to selectively and simultaneously combine floor and outdoor heating by the generation of hot water by the combustion heat And an object of the present invention is to provide a pallet fireplace for sealing.

According to a preferred embodiment of the present invention,

A firebox outer housing having a lower intake passage at an inner lower side thereof;

An inlet pipe having a plurality of intake holes formed on an upper surface of the enclosure outside the fireplace and connected to the lower intake passage so as to pass through the ceiling or wall of the room and upwardly installed at a predetermined height to introduce outside air required for combustion;

A combustion chamber for combustion having a combustion chamber in which the fuel is burnt, an air inlet communicating with the combustion chamber, an air inlet for discharging the air, a combustor mechanism for discharging the combusted gas, and a fuel inlet for injecting fuel into the combustion chamber, ;

Fuel supply means installed in the enclosure outside the fireplace to supply fuel to the combustion chamber;

An intake air blower for sucking air introduced through the intake pipe and supplying air required for combustion to the combustion chamber;

A hot water supply chamber for storing a predetermined amount of water between the inner casing for combustion and the outer casing of the fireplace to generate hot water by the combustion heat generated in the combustion chamber;

And a combustion exhaust pipe connected to the combustor mechanism and having one end connected to the intake pipe and the other end passing through the inside of the intake pipe to leave the room.

The hot water pipe is connected to a hot water pipe through a heating inlet and an outlet pipe, and a heating pipe is connected to heat exchanging means for heating at least one of a fan coil unit or a floor heating pipe. A circulation pump for circulating hot water is installed in the hot water pipe, And an expansion valve is provided in the enclosure outside the fireplace so as to maintain the hot water supply pressure in the hot water supply room at a constant pressure.

In addition, the combustion engine has a bypass section bent in U shape or S shape several times in the hot water supply room to increase the efficiency of heat recovery from the combustion gas;

A closed type opening / closing door of a combustion-use enclosure is located on the front side of the enclosure outside the fireplace so that radiant heat generated when the fuel is burned in the combustion chamber flows into the room;

And a re-receiving barrel installed to be able to be drawn out from and retractable from the outer shell of the fireplace to receive the remaining material from which the fuel is burnt is further provided below the combustion-use enclosure.

According to the sealing pallet fireplace which is combined with the heating hot water boiler of the present invention, since the air (oxygen) necessary for combustion in the fireplace is discharged from the outside through the double pipe intake pipe for surrounding the combustion engine, the intrusion of the toxic gas into the room is blocked Safety is improved.

In addition, since the hot water in the hot water supply room is generated by the heat of combustion, floor and outdoor heating can be performed through the fan coil unit and the floor heating pipe, thereby improving the utilization efficiency of the fireplace.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a sealing pallet fireplace in combination with a heating hot water boiler according to the present invention; Fig.
FIG. 2 is a general view showing the construction of a hot water purifying system for a sealing pallet fireplace in combination with a heating hot water boiler according to the present invention. FIG.
Fig. 3 is a state of use of the combustion and hot water supply of the pallet in Fig. 2; Fig.
Fig. 4 is a chimney-side use state diagram in which air necessary for combustion is introduced in Fig. 2; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

1 to 3, a sealing pallet fireplace 10 for use in combination with a heating hot water boiler according to the present invention includes a fireplace outside housing 12 provided in a room 4. Here, the room (4) is a place requiring heating, for example, a house, a green house, a plastic house, a warehouse, and the like. The enclosure 12 of the fireplace can be made of a metal plate.

An intake pipe (14) having a plurality of intake holes (141) is installed on a top surface of an upper surface of the mantel outer housing (12) at a predetermined upper end portion. When the intake introducing pipe 14 is installed in the room, the ceiling 5 (or the wall) on the side of the room 4 is upwardly installed at a predetermined height. Therefore, as shown in FIG. 4, the intake air introduction pipe 14 introduces outside air required for combustion from outside the room, that is, outside the room 6 through a plurality of intake holes 141. The intake pipe (14) is connected to the lower intake passage (13) in the enclosure (12) outside the fireplace.

And a combustion-use enclosure 16 is provided in the interior of the firebox outside enclosure 12. As shown in Fig. The combustion-use enclosure 16 communicates with the combustion chamber 161 in which the fuel (pallet) is burnt and the combustion chamber 161 and flows outside air required for combustion through the intake inlet pipe 14 and the lower intake passage 13 An air inlet 162, a combustor 163 for discharging combusted gas in the combustion chamber 161, and a fuel inlet 164 for injecting fuel into the combustion chamber 161.

Therefore, fuel is injected into the combustion chamber 161 of the combustion-use enclosure 16 through the fuel inlet 164 and the outside air required for combustion is supplied through the intake introduction pipe 14, and the burned exhaust gas is introduced into the combustion- 163 to the outside of the room through the combustor organs 22 to be described later.

A fuel supply means 18 for supplying fuel to the combustion chamber 161 is provided in the enclosure 12 outside the fireplace. The fuel supply means 18 basically has a hopper for storing the fuel, and a screw feed device for automatically feeding the fuel may be added as needed. Such a supply means is well known in the art and a detailed description thereof will be omitted.

And an intake air blower 18 is provided in the enclosure 12 outside the fireplace. The air supply blower 18 supplies air required for combustion to the combustion chamber 161. The air supply blower 18 can control the blowing amount by a controller not shown. The intake air blower 18 sucks the air introduced through the intake pipe 14 connected to the intake passage 13 and supplies air required for combustion to the combustion chamber 161.

A hot water supply chamber (20) for storing a predetermined amount of water is formed between the combustion-use enclosure (16) and the fireplace outside enclosure (12). The hot water supply room 20 generates hot water at a high temperature by the combustion heat generated in the combustion chamber 161.

And a combustion exhaust pipe 22 is connected to the side of the combustion-and-combustion mechanism 163. One end of the combustion exhaust pipe 22 is connected to the combustor mechanism 163 side and the other end passes through the inside of the intake air inlet pipe 14 to leave the room 4. Thus, the combustion exhaust pipe 22 has a dual pipe structure that is installed to penetrate the interior of the intake pipe 14, thereby simplifying the installation structure of the intake pipe and the exhaust pipe. In addition, since the exhaust of the combustion-side engine 22 is made to pass through the intake inlet pipe 14 and outside the room, the toxic exhaust gas does not enter the room.

Preferably, the combustion engine 22 may have a bypass section 221 that is bent several times in U-shape or S-shape in the hot water supply chamber 20 in order to increase the efficiency of heat recovery from the combustion gas. This bypass section 221 can increase the heating efficiency of the hot water supply chamber 20 by absorbing heat from the hot exhaust gas which is in contact with and discharged from the hot water in the hot water supply chamber 20 in the enclosure 12 outside the fireplace .

On the other hand, the hot water pipe 30 is connected to the hot water supply room 20 through the heating inlet / outlet ports 20a and 20b, and the heating pipe 30 is connected to the hot water heat exchanger Means can be connected. Of course, the fan coil unit 32 or the floor heating pipe 34 may be provided in the hot water pipe 30 as well. At this time, the hot water pipe 30 may be additionally provided with a circulation pump 36 for circulating hot water.

Further, it is preferable that the expansion valve 38 is provided in the enclosure 12 outside the fireplace so as to keep the hot water supply pressure in the hot water supply room 20 at a constant pressure. The expansion valve 38 removes a vapor pressure of a predetermined pressure or more formed in the hot water supply chamber 20 to maintain the safe hot water supply pressure in the hot water supply chamber 20. Therefore, the risk of explosion of the outer shell 12 of the fireplace can be prevented in advance.

A hermetically-closed opening / closing door 165 is installed on the front side of the outside of the fireplace enclosure 12 so that radiant heat generated when the fuel is burned in the combustion chamber 161 flows into the room. It is preferable that the hermetically closing door 165 is openable and closable in a hermetically closed form in the combustion enclosure 16. The hermetic type opening / closing door 165 may be made of a metal plate and installed in a hinge manner. Therefore, radiant heat generated by the combustion of the fuel in the combustion chamber 161 is radiated to the room through the enclosed opening / closing door 165, so that indoor heating becomes possible.

On the other hand, a material receiving box 40 for receiving the remaining material after burning the fuel may be further provided below the combustion-use enclosure 16. The receptacle 40 is installed in such a structure as to be withdrawn from and retractable from one side of the outer housing 12 so as to be recovered from the room.

'23' is the 'chimney cover'.

The use method and operation according to the present invention thus configured will be described.

First, for the fuel, the pallet P is supplied to the combustion chamber 161 through the fuel supply means 18 and the fuel inlet 164 on the side of the combustion enclosure 16 side. At this time, a small amount of the pallet is ignited and ignited so that the initial combustion is performed by first opening the hermetically-opening door 165 in the combustion chamber 161. 'Pallet' means not only fossil fuels such as anthracite, but also fuels that can be obtained from sawdust and other nuts produced from wood.

The combustion gas burned in the combustion chamber (161) is discharged to the outside of the room (4) through the combustion engine (22). At this time, the combustion gas supplies a large amount of heat to the hot water supply chamber (20) through the combustion enclosure (16) and the bypass section (221). Therefore, the hot water supply chamber 20 has a heat fluid capable of heating at a high temperature in a short time.

Further, since the bypass section 221 has an effect of increasing the thermal contact section, more heat is exchanged into the hot water supply chamber 20, thereby increasing the thermal efficiency of the fireplace.

On the other hand, the supply of oxygen necessary for combustion is performed by driving the blower 18 for intake air supply. The outside air is introduced from the outside through the multiple intake air holes 141 on the side of the intake pipe 14 during the operation of the intake air blowing fan 18 and is passed through the intake passage 13 and then through the air inlet 162 to the combustion chamber 161). Therefore, the supply of oxygen necessary for combustion is smoothly performed outside the room, not in the room, so that the safety is improved as compared with the case where indoor air is used as the combustion air.

The hot water in the hot water room 20 is circulated through the fan coil unit 32 and the floor heating pipe 34 by the operation of the circulation pump 36, so that indoor and floor heating can be performed at the same time.

In addition, radiant heat is introduced into the room through the hermetic type opening / closing door 165 located on the front surface of the combustion chamber 161, thereby improving the heating efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

12: outside the fireplace
14: intake pipe
16: Enclosure for combustion
165: Closing door for sealing
18: fuel supply means
18: blower for intake air
20: Hot water supply room
22:
221: Bypass section
32: Fan coil unit
34: Floor heating piping
40:

Claims (3)

(12) having a lower intake passage (13) at an inner lower side thereof;
A plurality of air intake holes (12) connected to the lower air intake passage (13) so as to be installed on the upper surface of the enclosure (12) of the fireplace and to pass through the ceiling or wall of the room (4) (14) having an intake pipe (141);
A combustion chamber 161 located inside the outside of the fireplace enclosure 12 for burning fuel, an air inlet 162 communicating with the combustion chamber 161 to introduce air, a combustor / distributor mechanism 163 for discharging the combusted gas, An internal combustion enclosure 16 having a fuel inlet 164 for injecting fuel into the combustion chamber 161;
Fuel supply means (18) installed in the enclosure (12) outside the fireplace to supply fuel to the combustion chamber (161);
An air supply blower 18 for sucking the air introduced through the intake introduction pipe 14 to supply air required for combustion to the combustion chamber 161;
A hot water room 20 storing a predetermined amount of water between the combustion-use enclosure 16 and the fireplace outside enclosure 12 to generate hot water by combustion heat generated in the combustion chamber 161;
And a combustion exhaust pipe (22) having one end connected to the combustible / distributing mechanism (163) and the other end passing through the inside of the intake introduction pipe (14) to leave the room (4) Pallet fireplace for sealing of boiler combined use.
The method according to claim 1,
A hot water pipe 30 is connected to the hot water supply room 20 through a heating inlet and an outlet and at least one heating heat exchanger is connected to the heating pipe 30 or a fan coil unit 32 or a floor heating pipe 34, The hot water piping 30 is provided with a circulation pump 36 for circulating hot water and an expansion valve 38 is installed in the enclosure 12 outside the fireplace so as to keep the hot water supply pressure in the hot water supply room 20 at a constant pressure A fireplace for enclosed pallets for both heating and hot water boilers.
The method according to claim 1,
In order to increase the efficiency of heat recovery from the combustion gas, the combustion engine 22 has a bypass section 221 bent in U shape or S shape several times in the hot water supply chamber 20;
A closed type opening / closing door 165 of the combustion-use enclosure 16 is located on the front side of the fireplace outside enclosure 12 so that radiant heat generated when the fuel is burned in the combustion chamber 161 flows into the room;
And a material receiving box (40) provided below the combustion-use enclosure (16) for receiving and retaining the remaining material that is drawn out and stored in the enclosure (12) outside the fireplace, Pallet fireplace for combined use with hot water boiler.
KR1020150049492A 2015-04-08 2015-04-08 Closed pallet fireplace for heating and hot water boiler KR20160120821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150049492A KR20160120821A (en) 2015-04-08 2015-04-08 Closed pallet fireplace for heating and hot water boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150049492A KR20160120821A (en) 2015-04-08 2015-04-08 Closed pallet fireplace for heating and hot water boiler

Publications (1)

Publication Number Publication Date
KR20160120821A true KR20160120821A (en) 2016-10-19

Family

ID=57250596

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150049492A KR20160120821A (en) 2015-04-08 2015-04-08 Closed pallet fireplace for heating and hot water boiler

Country Status (1)

Country Link
KR (1) KR20160120821A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454558B1 (en) 2001-12-03 2004-11-05 박규양 Fireplace and apparatus for heating using of it
KR100913579B1 (en) 2007-05-14 2009-08-26 주식회사 에스에프에이 Apparatus and method for Bonding Printed Circuit on FPD Panel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454558B1 (en) 2001-12-03 2004-11-05 박규양 Fireplace and apparatus for heating using of it
KR100913579B1 (en) 2007-05-14 2009-08-26 주식회사 에스에프에이 Apparatus and method for Bonding Printed Circuit on FPD Panel

Similar Documents

Publication Publication Date Title
KR100917787B1 (en) Hot air blower for solid fuel
KR101271748B1 (en) Pellet stove
RU196392U1 (en) LONG-BURNING SOLID FUEL BOILER
EP2884200A1 (en) Central heating boiler
KR100679316B1 (en) A firewood boiler
RU2319077C1 (en) Furnace
KR200446195Y1 (en) The hot-water boiler with a wood pellet
KR101397435B1 (en) Wood boiler using a pronciple of ondol
KR101588443B1 (en) Fire wood type hot blaster boiler
US5036829A (en) Heating apparatus
KR102437889B1 (en) Air circulation type high temperature combustion firewood stove
KR100796434B1 (en) Fuel save boiler
US4404954A (en) Fireplace furnace
RU2661516C2 (en) Solid-fuel gas-generated boiler
KR20160120821A (en) Closed pallet fireplace for heating and hot water boiler
KR101535983B1 (en) Fire wood type hot blaster heater
KR20200025607A (en) Fireplace with a boiler
KR101831619B1 (en) A combustion furnace for boiler
KR101958087B1 (en) The firewood steam boiler of flue tube-smoke type
KR101483879B1 (en) A stovepipe-less type stove
KR20160060300A (en) A stove
KR102361252B1 (en) Stove installed with air blocking and guiding wall
KR101325663B1 (en) Combustion device for fire wood boiler
KR200492272Y1 (en) Firewood boiler
KR101250434B1 (en) Combustion device for fire wood boiler

Legal Events

Date Code Title Description
E601 Decision to refuse application