KR101099469B1 - Downward wood burning boiler - Google Patents

Abstract

PURPOSE: A downward combustion-type wood boiler is provided to improve the combustion efficiency by forming an optimal combustion condition according to the state of combustion through the selective operation of main and sub blowers. CONSTITUTION: A downward combustion-type wood boiler comprises a combustion chamber(1), a water tank(2), a main blower(20), a main nozzle body(50), a sub blower(70) and a controller. The combustion chamber burns the timber from the top to the bottom. The water is filled around the combustion chamber and the water tank is formed. The main blower compulsorily supplies the air to the inside of the combustion chamber. The main nozzle body comprises a middle supplying unit(51), a plurality of top and bottom nozzle units(52,53). The middle supplying unit is installed along the middle inner wall of the combustion chamber. A plurality of top and bottom nozzle units is perpendicularly installed in the top and bottom of the middle supplying unit at a constant interval. The sub blower compulsorily supplies the air to the bottom of the combustion chamber. According to the burning time, the water temperature of the water tank and the temperature of exhaust air, the controller selectively controls the operation of the main and sub blowers.

Description

Downward wood burning boiler

The present invention relates to a boiler for burning solid fuel, such as wood, household waste, pellets, etc. from bottom to top or from top to bottom.

In general, home heating in farming and fishing villages uses oil or gas boilers, which are easy to install and easy to manage and use. In the oil boiler or gas boiler, the burner is automatically ignited according to the set temperature of the thermostat attached to the room to maintain the room temperature at the set temperature. However, boilers that use oil or gas as fuel are convenient because the burner is automatically ignited according to the set temperature to maintain the room temperature.However, due to the recent surge in international oil prices, the burden of heating costs on the people in rural areas is greatly increased. There is a situation.

Considering these circumstances, the spread of wood boilers using wood or waste wood as the main fuel is increasing in recent years in order to reduce heating costs in winter in rural and rural villages.

Wood boilers can be broadly classified into an upward combustion boiler which burns from the bottom to the top and a downward combustion boiler that burns from the top to the bottom according to the combustion direction.

(1) As shown in Fig. 1, the upward combustion boiler is generally composed of a structure in which wood is put into a combustion chamber and then ignited at the bottom to be burned to the upper side, and a stack for discharging combustion gas is installed at the upper portion of the combustion chamber. These wood boilers use wood and waste wood, etc., which are readily available in farming and fishing villages, as fuels, so that fuel costs are lower than those of oil or gas-fired boilers and electric boilers. However, the conventional upward combustion boiler has the advantage that the ignition is easy, but the following problems.

First, if the wood supplied to the combustion chamber was not ignited uniformly at the bottom, the wood loaded on the side part could be discarded unburned. In addition, when a large amount of wood is introduced into the combustion chamber at the same time, incomplete combustion and incomplete combustion gas are discharged as it is, resulting in a large amount of soot or smoke, as well as low combustion efficiency. Second, as the combustion gas was directly discharged to the upper stack, dust or embers were discharged to the outside, resulting in a risk of fire.

(2) Meanwhile, referring to the charcoal kiln boiler of FIG. 2 as an example of the down-fired boiler, the fuel is burned to the upper part while forcibly sucking and supplying air from the upper part of the combustion chamber to the lower part using a fan. Such a downward combustion boiler is advantageous to induce complete combustion because it uses a separate air supply device, and has a merit that the combustion time is longer than that of the bottom-up boiler.

However, according to such a down-fired boiler, the use of fuels such as charcoal, which has to burn the fuel from the top to the bottom, is limited only to the type of fuel, and the upper part of the combustion chamber having the highest temperature by the heat of combustion. There was a problem that the combustion efficiency is low as the heat exchange with the fluid is not made in the. In addition, when using fuel having a non-uniform shape such as firewood as the fuel inlet is installed in the upper part, there is a problem that it is difficult to control the combustion time and the heat of combustion because the supply amount and loading state are different according to the fuel injector. The larger the size of, the more serious this problem.

In addition, in the case of the existing down-fired boiler, the user should check the operation state of the boiler from time to time to adjust the air regulator or the blower. Specifically, the supply of sufficient air is required at the beginning of combustion. However, since the fire power is strong when the fuel is complexed, the air supply should be reduced. In the late stage of combustion, ash is generated a lot so ash is discharged to the outside when excess air is supplied. Therefore, it is necessary to reduce the air supply. Therefore, the user had to adjust the blower according to the combustion state, which was very cumbersome.

On the other hand, the upward or downward combustion boiler described above has a problem that the user can not arbitrarily determine the combustion direction because the combustion direction is fixed in each structure. In other words, it is preferable to burn the fuel to be supplied to the combustion chamber in the case where the fuel is wet or hard to ignite, but in the case of the boiler having a fixed combustion direction as described above, the fuel has to be removed from the combustion chamber and supplied again in order. There was a feeling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has an object of providing a down-fired wood boiler having two blowers suitable for down-combustion and controlling each blower according to the combustion state.

In addition, an object of the present invention is to provide a boiler capable of smoothly supplying air into a combustion chamber so that combustion can be smoothly performed even if the user arbitrarily selects one of the bottom-up or the top-down according to the type of fuel and the purpose of combustion.

In addition, an object of the present invention is to provide a boiler capable of injecting fuel into the upper and lower sides of the combustion chamber so as to uniformly load the solid fuel introduced into the combustion chamber.

In addition, the object of the present invention is to provide an easy-to-use boiler by automatically controlling the air supply amount and the supply position in the combustion chamber according to the combustion state.

In addition, the object of the present invention is to provide a boiler that does not directly exhaust the combustion gas to the outside and recovers heat from the combustion gas of a high temperature in the upper part of the combustion chamber.

In the down-fired wood boiler of the present invention for solving the above problems, in the down-fired wood boiler that supplies hot water by burning wood from the top to the bottom,
A combustion chamber in which the wood is loaded and burned from top to bottom;
A water tank filled with water around the combustion chamber;
A main blower for forcibly supplying air into the combustion chamber;
A main nozzle body connected to the main blower and having an intermediate supply part installed along the inner wall of the combustion chamber, and a plurality of upper and lower nozzle parts vertically spaced apart at upper and lower portions of the intermediate supply part;
An auxiliary blower forcibly supplying air to the lower part of the combustion chamber; And
Control unit for selectively controlling the operation of the main blower and the auxiliary blower according to the combustion time, the water temperature and the exhaust temperature in the water tank after operating at least the main blower of the main blower and the auxiliary blower in the initial stage of combustion ; Including,
The upper or lower nozzle portion is made of a tubular body, characterized in that the tubular body is formed with a plurality of injection holes for ejecting eccentrically toward the center line of the combustion chamber to form a vortex by injecting the air inclined into the combustion chamber.

Preferably, further comprising an upper and lower fuel inlets for supplying the wood to the upper and lower combustion chambers, respectively, wherein the main blower is installed between the upper and lower fuel inlets.

At this time, the upper fuel inlet door for opening and closing the upper fuel inlet; And an upper air regulator for naturally supplying air into the combustion chamber during the downward combustion on the upper fuel input door. Further comprising: a lower fuel input door for opening and closing the lower fuel inlet; And a lower air regulator for naturally supplying air into the combustion chamber during upward combustion on the lower fuel input door. It may further include.

delete

Preferably, the injection pipe connected to the auxiliary blower for injecting air to the lower portion of the combustion chamber; It includes more. Or an auxiliary nozzle body connected to the auxiliary blower and installed along the lower inner wall of the combustion chamber and having a plurality of injection holes for injecting air into the combustion chamber; It further includes.

Preferably, the control unit, a timer for setting the operating time of the main blower; A combustion time controller for stopping the operation of the main blower and operating the auxiliary blower when the set time arrives; It includes.

At this time, the combustion time control unit, the main blower switch for additionally operating the main blower by a set time when a lot of wood or smoke occurs in the combustion chamber; It further includes.

Preferably, the control unit, the water temperature sensor for measuring the temperature of the water in the water tank; A water temperature setting unit configured to set a maximum temperature and a minimum temperature of the water; And stopping the operation of the main blower and the auxiliary blower when the set maximum temperature is reached, and operating the auxiliary blower if the set temperature is lower than the set minimum temperature. It includes.

At this time, the maximum temperature is 60 ~ 80 ℃, the minimum temperature is set to 3 ~ 7 ℃ lower than the maximum temperature.

Preferably, the control unit, the exhaust temperature sensor for measuring the exhaust temperature discharged from the combustion chamber at all times; An exhaust temperature setting unit for setting the exhaust temperature; And an exhaust temperature controller for stopping the operation of the main blower and the auxiliary blower when the temperature falls below the set temperature. It includes.

At this time, the exhaust temperature sensor is installed in the stack for discharging the combustion gas from the combustion chamber, characterized in that the set temperature of the exhaust temperature setting unit is 90 ~ 100 ℃.

Preferably, the first heat exchanger in the form of a disc or a square parallel to the upper portion of the combustion chamber and connected to the inside of the water tank; It further includes.

In this case, a through hole through which combustion gas passes is formed in the center of the first heat exchange part, and the first heat exchange part and the water tank are connected to each other, and a disc or a quadrangle disposed parallel to and spaced apart from the upper part of the first heat exchange part. A second heat exchanger of the type; It further includes.

According to the down-fired wood boiler of the present invention, the vortex air is supplied into the combustion chamber to achieve complete combustion of the wood, and of course, the main blower and the auxiliary blower are selectively operated according to the combustion time, water temperature, and exhaust gas state. Therefore, it is possible to improve the combustion efficiency along with the complete combustion of wood by making the optimum combustion condition according to the combustion progress state, and it is convenient to use and safe operation of the boiler is possible.

In addition, the lower air control port formed in the lower fuel inlet is installed so that the user can use the normal upward combustion type in addition to the downward combustion type depending on the type or state of the fuel.

In addition, there is an advantage that the fuel can be easily loaded because the fuel supply is possible from both the top or bottom.

In addition, by recovering heat from the combustion gas by the heat exchanger in the upper part of the combustion chamber, it is possible to lower the temperature of the exhaust gas and to improve thermal efficiency.

1 is a cross-sectional view of a conventional upward combustion boiler.
2 is a cross-sectional view of a conventional downward combustion boiler.
3, 4 is a perspective view, side cross-sectional view of the boiler according to an embodiment of the present invention.
5 and 6 are a perspective view and a plan view of the main nozzle body constituting the present invention.
7 is a side cross-sectional view of a boiler according to another embodiment of the present invention.
8 is a perspective view and a plan view of the auxiliary nozzle body of FIG.
10 is a flowchart showing the operation sequence by the control unit of the present invention.

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. First, the basic structure of a boiler according to the present invention will be described, and then technical features of the present invention will be described in detail.

3 and 4, the boiler according to the present invention is formed of a substantially cylindrical combustion chamber 1, in which the stack 5 is installed, and a water tank 2, a heat insulating material 3, and a case 4 are sequentially formed. have. In addition, the front and the upper and lower fuel input doors 31 and 41 having upper and lower air regulators 32 and 42 for naturally supplying air into the combustion chamber from the outside are installed, and the main blower 20 is interposed therebetween. And the control unit 90 is installed inside and has an intermediate door 22 and a viewing window 23 on the front, and has a front box 21 formed with an air hole to allow air to enter the side.

A cold water supply port 6 and a supplemental water supply port 7 are respectively connected to the lower portion of the water tank 2 for heating or hot water use, and a hot water outlet for discharging hot water heated by combustion heat at the upper portion thereof. 8) and a safety valve (9) for removing the air in the water tank (2).

On the other hand, by installing the heater insertion hole 10 so that the electric heater (not shown) is inserted into the upper or lower portion (installed in the upper portion in Figure 4) of the water tank (2), it is also possible to use a boiler using electricity as needed have.

The characteristics of the present invention are mainly 1) solid fuel input structure 2) the configuration of the blower and nozzle body for the downstream combustion, 3) the configuration of the heat exchanger for the efficient recovery of the heat of combustion, 4) according to the combustion time, water temperature, exhaust temperature It is in the structure which controls a blower. Hereinafter, each characteristic structure is demonstrated in order.

1) Solid fuel input structure

Upper and lower fuel inlets 30 and 40 are respectively provided on the upper and lower sides of the combustion chamber 1 so that solid fuel can be supplied to the upper and lower parts of the combustion chamber 1. Therefore, after the solid fuel is supplied through the upper fuel inlet 30, the fuel may be uniformly loaded by additionally supplying the solid fuel through the lower fuel inlet 40 according to the loading state of the solid fuel in the combustion chamber 1. In the case of various types of solid fuel supplied, the loading position of the solid fuel can be determined to meet the user's intention.

 As a result, the upper fuel inlet 30 may be opened and then the solid fuel may be ignited at the top to be used in a downward combustion method, or the lower fuel inlet 40 may be opened to be ignited at the bottom to be used in a normal upward combustion type.

 Therefore, for fuels that are not easily burned in the solid fuel, when the upward combustion type is adopted, the fuel is additionally loaded in the upper part of the fuel loaded through the upper fuel inlet 30, and when the downward combustion type is adopted, the lower fuel inlet ( Further loading is possible under the combustion chamber 1 via 30).

Since solid fuel may generate a lot of smoke when excessively charged, it is preferable to load about 2/3 of the inside of the combustion chamber. In the case of downward combustion, solid fuel is inputted first with fuel that may generate a lot of smoke such as wet wood, logs, and live wood, and then with fuel such as dry wood, and finally with fuel that is easily burned such as twigs and boxes. Input.

In the boiler of the present invention configured as described above, when the same solid fuel is used, the combustion efficiency is 15 to 20% higher than that of the upstream combustion, and almost no smoke is emitted. However, in the case of a bulky solid fuel, such as a log that is less dry, it is difficult to use in a downward combustion type due to the difficulty of ignition, so it is preferable to use the conventional upward combustion type.

2) Configuration of blower and nozzle body for downward combustion

The present invention includes a main blower 20 and an auxiliary blower 70 having a smaller capacity. The main blower 20 uniformly supplies sufficient air into the combustion chamber 1 to enable downward combustion. 70 is used to replace or in parallel with the main blower 20 depending on the combustion conditions.

First, the main blower 20 is installed between the upper and lower fuel inlets 30 and 40 and is connected to the main nozzle body 50 for supplying air into the combustion chamber 1. The main nozzle body 50 is connected to the main blower 20 by a connecting pipe 54 and is spaced apart from the intermediate supply part 51 provided along the middle inner wall of the combustion chamber 1 and above and below the intermediate supply part 51. The upper nozzle part 52 and the lower nozzle part 53 which are installed perpendicularly are formed. As a result, the air supplied from the main blower 20 is supplied to the upper and lower nozzle parts 52 and 53 via the intermediate supply part 51 and is uniformly supplied to the entire inside of the combustion chamber 1.

The intermediate supply part 51 is composed of an annular tubular body having a square cross section, and the upper and lower nozzle parts 52, 53 are constituted by a rectangular or circular tubular cross section at the upper and lower surfaces of the intermediate supply part 51. Each can be combined.

4 to 6 are formed by circular tubular cross-sections of the upper and lower nozzle portions 52 and 53, and include a plurality of injection holes 55 which inject obliquely toward the combustion chamber 1, and thus the combustion chamber 1 ) Air is supplied in a vortex state inside. From this it is possible not only to supply sufficient air to the solid body but also to induce complete combustion by prolonging the time for which the incomplete combustion gas stays in the combustion chamber 1.

In this case, the plurality of injection holes 55 formed in the upper and lower nozzle parts 52 and 53 are angularly eccentric with respect to the inner center of the combustion chamber 1 when the inside of the combustion chamber 1 is viewed in a plane as shown in FIG. 6. By forming the air, the air injected from the upper and lower nozzle portions 52 and 53 forms a vortex in the combustion chamber 1.

The main blower 20 for forcibly supplying air to the main nozzle body 50 is formed in the lower fuel input door 41 instead of stopping operation when solid fuel is ignited in the combustion chamber 1 and combustion is smoothly performed. The air may be naturally supplied through the air regulator 42.

Meanwhile, the cross section of the intermediate supply part 51 illustrated in the drawings of the present invention may be replaced with various shapes such as a circle and a hexagon in addition to the rectangular shape, and the upper and lower nozzle parts 52 and 53 may also have a rectangular shape in addition to the circular shape. Of course, it is possible to substitute a variety of shapes, such as hexagon.

Next, the auxiliary blower 70 is installed in the lower fuel input door 41 as shown in FIGS. 3 and 4, and extends the injection pipe 71 to the lower portion of the combustion chamber as shown in FIG. 4 to supply air from the outside. Meanwhile, according to another exemplary embodiment of the present invention, the auxiliary blower 70 may be connected to the connecting portion 82 of the auxiliary nozzle body 80 via the connecting pipe 72 as shown in FIG. 7. At this time, the auxiliary nozzle body 80 is installed along the inner wall of the lower part of the combustion chamber 1, and consists of a tube body in which a plurality of injection holes 81 for injecting air into the combustion chamber are formed.

3) Composition of heat exchanger

Since the boiler has a high temperature in the upper part of the combustion chamber 1 due to the nature of the tropical flow, it is preferable to install a heat exchanger 60 connected to the water tank 2 in the upper part of the combustion chamber 1 for efficient recovery of the combustion heat. .

To this end, as shown in FIG. 4, the heat exchanger 60 may have a double structure. Specifically, the first heat exchanger 61 having a disc or square shape having a through hole 64 through which a flame or combustion gas passes through the upper center of the combustion chamber 1 is connected to the first heat exchanger 61 and a connecting tube 63 therebetween. It can be comprised by the 2nd heat exchange part 62 parallel to the upper part. The first and second heat exchange parts 61 and 62 are provided at a predetermined distance from the inner wall surface of the combustion chamber 1.

From this, before the combustion gas is discharged through the stack 5, it is possible to recover the combustion heat as much as possible while contacting the first heat exchange part 61 and the second heat exchange part 62.

In this case, when the heat exchanger 60 is installed in duplicate, when a large amount of residue is accumulated on the upper surface of the lower first heat exchanger 61, the upper fuel inlet 30 may be opened and then cleaned.

4) Configuration of Control Unit

The control unit 90 for controlling the main blower 20 and the auxiliary blower 70 of the present invention includes a combustion time control unit, a water temperature control unit, and an exhaust temperature control unit according to a control method.

First, the combustion time control unit sets the operation time of the main blower 20 using the timer 91, and when the set time arrives, the operation of the main blower 20 is stopped and the auxiliary blower 70 is operated. The set time is set in consideration of the combustion duration of the fuel. However, although the set time has elapsed, it is necessary to operate the main blower 20 again when a lot of solid fuel remains inside the combustion chamber 1 or when a lot of smoke is generated. To this end, a main blower switch 93 for additionally operating the main blower 20 by the time set in the timer 91 is provided.

In addition, the auxiliary blower switch 94 may be separately provided so that only the auxiliary blower 70 may be forcibly operated since the operation of the main blower 20 is unnecessary when the fuel supply amount is small and the fuel is loaded only in the lower portion of the combustion chamber.

The water temperature control unit sets the maximum temperature and the minimum temperature of the water in the water tank 2 through the water temperature setting unit 92, and when the maximum temperature is detected by the water temperature sensor 96, the water blower 20 assists with the main blower 20. The operation of the blower 70 is stopped irrespective of the operation of the timer 91, and if the set temperature is lower than the set minimum temperature, the auxiliary blower 70 is operated again.

The maximum temperature set at this time is 60-80 degreeC, Preferably about 70 degreeC is suitable. If the maximum temperature is too low, the air supply will be reduced in a poorly burned state, and smooth combustion will not be achieved. If the maximum temperature is too high, the water in the water tank 2 will be lost due to the heat of combustion by the remaining combustion products even if the air supply is stopped. This may be caused by overheating to a temperature above the maximum temperature, in which case a problem due to the pressure rise of the water tank (2) occurs.

And the minimum temperature is set to 3-7 degreeC, preferably 5 degreeC lower than the above-mentioned highest temperature. If the minimum temperature is too low below the maximum temperature, combustion may be stopped due to lack of air supply to the fuel that has not been properly burned, and if the difference with the maximum temperature is too small, the auxiliary blower 70 will start and stop for a short time. Repeatedly may cause trouble.

Finally, the exhaust temperature control unit sets the exhaust temperature discharged from the combustion chamber 1, and stops the operation of the main blower 20 and the auxiliary blower 70 when it detects that the temperature falls below the set temperature. This is to prevent unnecessary operation of the main and auxiliary blowers 20 and 70 when the fuel is all burned or only a small ember is left.

The measurement of the exhaust temperature can be controlled by measuring the temperature of the exhaust gas directly, but the contact temperature sensor 97 is installed in the stack 5 and the set temperature is set to 90 to 100 ° C through the exhaust temperature setting unit 95. You can also decide within. In this case, if the set temperature is too low, the temperature of the stack 5 may be maintained for a considerable time due to the latent heat of the water accumulated in the water tank 2 even after the combustion is completed, which may cause unnecessary blower operation, and the set temperature may be too high. This is because the blower may be stopped while the combustion is in progress.

An embodiment of the boiler control method of the present invention configured as described above will be described in detail with reference to FIG. 10.

First, the timer 91 is set to 1 hour, the water temperature setting unit 92 is set to a maximum temperature of 70 ° C and a minimum temperature of 65 ° C, and the exhaust temperature setting unit 95 is set to 100 ° C.

Thereafter, the fuel loaded in the combustion chamber 1 is ignited in the upper portion, and then the auxiliary blower 70 and the main blower 20 are operated.

When the one-hour combustion time set by the timer 91 has elapsed, the main blower 20 stops operating, and only the auxiliary blower 70 is operated. At this time, if a lot of smoke is generated from the stack (5), or a lot of unburned fuel is left, by turning on the main blower switch 93 can be extended by one hour.

When combustion progresses and the temperature of the water tank 2 becomes 70 degreeC or more, operation | movement of the main blower 20 and the auxiliary blower 70 is stopped irrespective of the setting time of the timer 91. FIG.

As a result, the amount of air supplied by the main blower 20 and the auxiliary blower 70 decreases, and as the heat of combustion decreases, the water in the water tank 2 gradually cools. When the water temperature is lowered by 5 ° C. to 65 ° C., the auxiliary blower 70 is operated again to continuously supply air to the fuel loaded in the combustion chamber 1.

If the temperature of the water in the water tank (2) is 70 ℃ or more again by the operation of the auxiliary blower 70, the operation of the auxiliary blower 70 is stopped, when the temperature of the water is lowered to 65 ℃ or less auxiliary blower (70) ) Process is repeated.

Finally, even when all of the solid fuel is burned, the temperature of the water can be maintained for more than 65 ° C. for a considerable time. When the exhaust temperature measured in (5) falls below 100 ° C, it is determined that combustion is completed and the operation of the main blower 20 and the auxiliary blower 70 is stopped.

In the above, the present invention has been described with reference to the accompanying drawings, but the present invention is not limited thereto, and the technical idea of the present invention and a patent to be described below by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

10: heater insertion hole 20: main blower
30: upper fuel inlet 40: lower fuel inlet
32, 42: upper and lower air regulator 50: main nozzle body
51: intermediate supply portion 52: upper nozzle portion
53: lower nozzle portion 55: injection hole
64: through hole 70: auxiliary blower
80: auxiliary nozzle body 90: control unit
91: timer 92: water temperature setting unit
93: main blower switch 94: auxiliary blower switch
95: exhaust temperature setting unit 96: water temperature sensor
97: exhaust temperature sensor

Claims (15)

In a down-fired wood boiler that burns wood from top to bottom to supply hot water,
A combustion chamber in which the wood is loaded and burned from top to bottom;
A water tank filled with water around the combustion chamber;
A main blower for forcibly supplying air into the combustion chamber;
A main nozzle body connected to the main blower and having an intermediate supply part installed along the inner wall of the combustion chamber, and a plurality of upper and lower nozzle parts vertically spaced apart at upper and lower portions of the intermediate supply part;
An auxiliary blower forcibly supplying air to the lower part of the combustion chamber; And
Control unit for selectively controlling the operation of the main blower and the auxiliary blower according to the combustion time, the water temperature and the exhaust temperature in the water tank after operating at least the main blower of the main blower and the auxiliary blower in the initial stage of combustion ; Including,
The upper or lower nozzle portion is made of a tubular body, the tubular body is a downward combustion type characterized in that a plurality of injection holes are formed to eccentrically spray toward the center line of the combustion chamber to form a vortex by injecting the air into the combustion chamber inclined Wood boiler. The method of claim 1,
And further comprising upper and lower fuel inlets for supplying the wood to the upper and lower sides of the combustion chamber, respectively.
The main blower is a downward combustion wood boiler, characterized in that installed between the upper, lower fuel inlet. The method of claim 2,
An upper fuel inlet door for opening and closing the upper fuel inlet; And
An upper air regulator for naturally supplying air into the combustion chamber during the downward combustion on the upper fuel injection door;
Down-fired wood boiler, characterized in that it further comprises. The method of claim 2,
A lower fuel inlet door for opening and closing the lower fuel inlet; And
A lower air regulator for naturally supplying air into the combustion chamber during upward combustion on the lower fuel input door;
Down-fired wood boiler, characterized in that it further comprises. delete The method of claim 1,
An injection tube connected to the auxiliary blower and injecting air into the combustion chamber;
Down-fired wood boiler, characterized in that it further comprises. The method of claim 1,
An auxiliary nozzle body connected to the auxiliary blower and installed along the lower inner wall of the combustion chamber and having a plurality of injection holes for injecting air into the combustion chamber;
Down-fired wood boiler, characterized in that it further comprises. The method of claim 1,
The control unit,
A timer for setting an operating time of the main blower;
A combustion time controller for stopping the operation of the main blower and operating the auxiliary blower when the set time arrives;
Downward fired wood boilers comprising a. The method of claim 8,
The combustion time control unit,
A main blower switch configured to additionally operate the main blower for a predetermined time when a large amount of wood remains in the combustion chamber or a lot of smoke is generated;
Down-fired wood boiler, characterized in that it further comprises. The method of claim 1,
The control unit,
A water temperature sensor measuring a temperature of water in the water tank;
A water temperature setting unit configured to set a maximum temperature and a minimum temperature of the water; And
Stopping the operation of the main blower and the auxiliary blower when the set maximum temperature is reached, and operating the auxiliary blower if the set temperature is lower than the set minimum temperature;
Downward fired wood boilers comprising a. The method of claim 10,
Wherein the maximum temperature is 60 ~ 80 ℃, the minimum temperature is 3 to 7 ℃ lower than the maximum temperature of the wood burning boiler characterized in that it is set. The method of claim 1,
The control unit,
An exhaust temperature sensor for measuring an exhaust temperature discharged from the combustion chamber at all times;
An exhaust temperature setting unit for setting the exhaust temperature; And
An exhaust temperature control unit for stopping the operation of the main blower and the auxiliary blower when the temperature falls below the set temperature;
Downward fired wood boilers comprising a. The method of claim 12,
The exhaust temperature sensor is installed in a stack for discharging the combustion gas from the combustion chamber, the set temperature of the exhaust temperature setting unit is 90 ~ 100 ℃ characterized in that the wood burning boiler. The method of claim 1,
A first heat exchanger having a disc or square shape installed parallel to the upper portion of the combustion chamber and connected to the water tank;
Down-fired wood boiler, characterized in that it further comprises. The method of claim 14,
A through hole through which combustion gas passes is formed in the center of the first heat exchange part.
A second heat exchanger having a disc or square shape connected to the first heat exchanger and the water tank and spaced apart from the upper portion of the first heat exchanger in parallel;
Down-fired wood boiler, characterized in that it further comprises.

Images