KR102683854B1 - Felet stove having backflame preventive pellet input structure - Google Patents

Abstract

The present invention relates to a pellet stove with a flashback prevention pellet input structure, wherein a pellet combustion plate 140 is disposed on the bottom, and a stove body provided with a combustion chamber 110 with a pellet inlet 160 on the rear wall ( 100) and; A pellet supply pipe 220 that is coupled to the pellet inlet 160 at the rear of the stove body 100 and supplies the pellets (P) accommodated in the pellet hopper 210 to the pellet combustion plate 140 by its own weight, A pellet supply unit 200 that moves back and forth in the coupling area of the pellet hopper 210 and the pellet supply pipe 220 and has an opening/closing intermittent plate 230 that regulates the supply of pellets; It is provided between the opening/closing control plate 230 and the pellet supply pipe 220 so that the heat inside the combustion chamber 110 is transferred to the pellet hopper 210 along the pellet supply pipe 220 and prevents backfire from occurring. It includes a flashback prevention plate 300, wherein the flashback prevention plate 300 includes an prevention plate body 310 having a pellet supply hole 320 formed on the plate surface; It is formed on one side of the pellet supply hole 320 of the prevention plate body 310 to be inclined at a certain angle toward the bottom to block heat from being transferred to the pellet hopper 210 when the opening and closing plate 230 is open. It is characterized by including a front fire blocking plate (330).

Description

Pellet stove with backfire prevention pellet input structure {FELET STOVE HAVING BACKFLAME PREVENTIVE PELLET INPUT STRUCTURE}

The present invention relates to a pellet stove, and more specifically, to a pellet stove equipped with a flashback prevention function in a pellet input structure in which pellets are supplied by their own weight without power.

In general, various heating stoves using oil, gas, or electricity are used in winter. Heating stoves can maintain a constant temperature and are convenient to use, but there are problems such as rising heating costs along with high oil prices and air pollution caused by combustion gases.

Accordingly, the use of pellet stoves using wood-pellets, which are processed by crushing forestry waste or felled wood into sawdust and then compressing it into a cylindrical shape, has been increasing in recent years.

A conventional pellet stove consists of an inlet through which pellets are introduced, a stove body with a combustion chamber, and an exhaust pipe connected to the stove body. In a conventional pellet stove, pellets are introduced into the stove body through an inlet, and the heat generated as the pellets burn inside the combustion chamber is transferred to the outside of the stove body to provide heating.

However, in this conventional pellet stove, the pellets are filled inside the pellet supply pipe connecting the hopper where the pellets are stored and the inlet, so when combustion occurs for a long period of time inside the stove body or the flame is extinguished and the external exhaust pressure of the combustion gas is lowered, combustion of the pellets occurs. There was a problem in that the high-temperature heat could not be discharged through the exhaust pipe, but was transmitted to the pellet supply pipe, and the flame would transfer to the pellets inside, causing a backfire phenomenon in which even the pellets stored in the hopper would be burned.

The purpose of the present invention is to solve the above-mentioned problem, and to provide a pellet stove that can prevent backfire in the hopper by blocking heat transfer to the hopper even if heat is transferred to the pellet supply pipe.

The above objects and various advantages of the present invention will become more apparent to those skilled in the art from preferred embodiments of the present invention.

The object of the present invention can be achieved by a pellet stove having a flashback prevention pellet injection structure. The pellet stove of the present invention includes a stove body 100 with a pellet combustion plate 140 disposed on the bottom and a combustion chamber 110 with a pellet inlet 160 on the rear wall; A pellet supply pipe 220 that is coupled to the pellet inlet 160 at the rear of the stove body 100 and supplies the pellets (P) accommodated in the pellet hopper 210 to the pellet combustion plate 140 by its own weight, A pellet supply unit 200 that moves back and forth in the coupling area of the pellet hopper 210 and the pellet supply pipe 220 and has an opening/closing intermittent plate 230 that regulates the supply of pellets; It is provided between the opening/closing control plate 230 and the pellet supply pipe 220 so that the heat inside the combustion chamber 110 is transferred to the pellet hopper 210 along the pellet supply pipe 220 and prevents backfire from occurring. It includes a flashback prevention plate 300, wherein the flashback prevention plate 300 includes an prevention plate body 310 having a pellet supply hole 320 formed on the plate surface; It is formed on one side of the pellet supply hole 320 of the prevention plate body 310 to be inclined at a certain angle toward the bottom to block heat from being transferred to the pellet hopper 210 when the opening and closing plate 230 is open. It is characterized by including a front fire blocking plate 330 that forms a side empty space.

According to one embodiment, the flashback prevention plate 300 is bent perpendicular to the direction facing the front flashback prevention plate 330 on the other side of the pellet supply hole 320 of the prevention plate body 310 to open and close the plate. It may further include a rear flashback blocking plate 340 that forms an upper empty space that blocks heat from being transferred to the pellet hopper 210 when the control plate 230 is closed.

According to one embodiment, the front fire-blocking plate 330 may be formed to have an area that increases toward the bottom, and the rear fire-blocking plate 340 may be formed to have an area that narrows toward the bottom.

The pellet stove according to the present invention is equipped with a flashback prevention plate in the boundary area between the pellet supply pipe and the pellet hopper, so that when the exhaust pressure inside the combustion chamber is lowered, even if combustion heat is transferred to the pellet supply pipe, it blocks the transfer to the pellet hopper and causes a flashback in the pellet hopper. can be prevented from occurring.

In particular, the front fire prevention plate and the rear fire prevention plate formed on the flashback prevention plate form an empty space that blocks the transfer of heat when the opening and closing plate is opened and closed, respectively, and blocks heat from being transferred to the pellet hopper, causing a flashback. can be effectively prevented.

1 is a side view showing the side configuration of a pellet stove according to the present invention;
Figure 2 is a side view showing the side configuration of the pellet supply unit and the backfire prevention plate of the pellet stove according to the present invention;
Figure 3 is an exploded perspective view showing the combined structure of the pellet supply part and the flashback prevention plate of the pellet stove according to the present invention;
Figure 4 is an example showing the backfire prevention operation of the backfire prevention plate when the pellet opening and closing plate of the pellet stove according to the present invention is opened,
Figure 5 is an exemplary diagram showing the backfire prevention operation of the backfire prevention plate when the pellet opening and closing plate of the pellet stove according to the present invention is closed.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention are omitted.

Figure 1 is a schematic diagram schematically showing the side configuration of the pellet stove (1) according to the present invention. As shown, the pellet stove 1 includes a stove body 100 formed with a combustion chamber 110 in which combustion of pellets P occurs, and a pellet supply unit that continuously supplies pellets P to the stove body 100 ( 200) and a flashback prevention plate 300 that is coupled to the pellet supply unit 200 and blocks heat from the combustion chamber 110 from being transmitted along the pellet supply unit 200 to prevent flashbacks in the pellet hopper 210. do.

The pellet stove (1) of the present invention is operated by a pellet hopper (210) when the exhaust pressure of the combustion gas is lowered during combustion of pellets (P) in the combustion chamber (110) and heat (H) is moved through the pellet supply unit (200). The flashback prevention plate 300 provided between the pellet supply pipes 220 blocks heat (H) from being transferred to the pellet hopper 210. As a result, heat (H) is transferred to the pellet hopper 210 to prevent backfire from igniting the pellets (P) inside the pellet hopper 210.

The stove body 100 receives pellets (P) from the pellet supply unit 200 and causes the pellets (P) to burn and generate a flame. The stove main body 100 includes a combustion chamber 110 in which combustion of pellets P occurs, a lower housing 120 coupled to the lower part of the combustion chamber 110, and a door 130 that opens and closes the front of the combustion chamber 110. and a pellet combustion plate 140 provided on the bottom of the combustion chamber 110, and an ash receiver 150 provided in the lower housing 120 to accommodate the ash (B) that has fallen through the pellet combustion plate 140. , a pellet inlet 160 is provided on the back of the combustion chamber 110 in communication with the pellet supply unit 200 to inject the pellets (P) into the pellet combustion plate 140, and is provided at the upper part of the combustion chamber 110 to produce pellets ( It includes a flue 170 that discharges the combustion gas (C) generated during the combustion process of P) to the outside.

In the combustion chamber 110, the pellets P are burned to generate a flame, and the heat generated by this is transferred to the outside to heat the space. The door 130 is provided in front of the combustion chamber 110 to open and close the combustion chamber 110.

The lower housing 120 is provided at the lower part of the combustion chamber 110, and the pellet combustion plate 140 and the ash catch 150 are combined. The pellet combustion plate 140 is disposed in the air supply hole 111 at the bottom of the combustion chamber 110 so that air moved from the lower housing 120 is supplied to the pellets P, thereby allowing combustion of the pellets P to proceed.

The ash catcher 150 accommodates ash generated during pellet combustion and allows the ash to be disposed of externally. An air volume control device (not shown) may be provided on the front of the ash catch 150 to adjust the amount of air supplied to the combustion chamber 110 through the air supply hole 111.

A pellet inlet 160 through which pellets (P) are supplied from the pellet supply unit 200 is formed at the rear of the combustion chamber 110. The pellet supply unit 200 is coupled to the pellet supply pipe 220 at the pellet inlet 160 to discharge pellets to the pellet combustion plate 140.

The upper part of the combustion chamber 110 is provided with a flue 170 that discharges combustion gas generated during combustion of the pellets P to the outside.

Meanwhile, a sweet potato oven 180, which can cook foods such as sweet potatoes or potatoes by inserting them into the combustion chamber 110, can be detachably attached to the upper part of the combustion chamber 110.

The pellet supply unit 200 continuously supplies pellets P to the combustion chamber 110 by its own weight. Figure 2 is a side view showing the side configuration of the pellet supply unit 200 and the flashback prevention plate 300, and Figure 3 is an exploded perspective view showing the configuration of the pellet supply unit 200 and the flashback prevention plate 300. am.

As shown, the pellet supply unit 200 includes a pellet hopper 210 in which pellets P are stored, a pellet supply pipe 220 connecting the pellet hopper 210 and the pellet inlet 160 of the combustion chamber 110, It includes an opening and closing plate 230 that opens and closes between the pellet supply pipe 220 and the pellet hopper 210.

The pellet hopper 210 is formed in a box shape and pellets are stored therein. At the bottom of the pellet hopper 210, a support plate flange 211 extends horizontally over a certain area. The pellet supply pipe 220 is formed in the form of a tube with a certain length and is provided in an inclined form so that the pellets (P) can be supplied by their own weight.

The lower part of the pellet supply pipe 220 is coupled with the pellet inlet 160, and the upper part is coupled with the flashback prevention plate 300. A flashback prevention plate 300 is provided at the top of the pellet supply pipe 220, and an intermittent plate support frame 240 is laminated on the top of the flashback prevention plate 300. And, an opening and closing intermittent plate 230 is provided between the intermittent plate support frame 240 and the support plate flange 211.

A pellet moving hole 241 is formed through the plate surface of the intermittent plate support frame 240. The opening and closing intermittent plate 230 is provided in a size that blocks the pellet moving hole 241 and moves back and forth between the intermittent plate support frame 240 and the support plate flange 211 to open and close the pellet moving hole 241.

A handle 231 is provided vertically at the rear end of the opening and closing panel 230. The user presses the externally protruding handle 231 back and forth to cause the opening/closing plate 230 to open and close the pellet transfer hole 241.

As shown in Figure 4, when the opening and closing plate 230 is pulled to the rear of the plate support frame 240, the pellet moving hole 241 is opened and closed, and the pellets (P) inside the pellet hopper 210 are moved by their own weight. It is moved to the pellet supply pipe 220 and supplied to the upper part of the pellet combustion plate 140 of the combustion chamber 110.

On the other hand, as shown in Figure 5, when the opening/closing stop plate 230 is inserted into the upper part of the stop plate support frame 240, the pellet moving hole 241 is closed and the movement of the pellet (P) is blocked.

The flashback prevention plate 300 is provided between the top of the pellet supply pipe 220 and the intermittent plate support frame 240 so that the high temperature heat (H) inside the combustion chamber 110 moves along the pellet supply pipe 220 to produce pellets ( P) and prevents backfire from occurring inside the pellet hopper (210).

As shown in FIG. 3, the flashback prevention plate 300 includes an prevention plate body 310 provided in the form of a plate, a pellet supply hole 320 formed through the prevention plate body 310, and a front of the pellet supply hole 320. It includes a front fire-blocking plate 330 provided in and a rear fire-blocking plate 340 provided to face the front fire-blocking plate 330.

The prevention plate body 310 is provided in the form of a plate having an area corresponding to the intermittent plate support frame 240. The prevention plate body 310 is welded and fixedly coupled to the top of the pellet supply pipe 220.

The pellet supply hole 320 is cut in a shape corresponding to the pellet supply pipe 220 so that the pellets (P) are moved to the pellet supply pipe 220 when the opening and closing plate 230 is opened.

The front fire prevention plate 330 is bent downward from the prevention plate body 310 through the pellet supply hole 320, so that when the opening/closing control plate 230 is opened, the heat (H) inside the combustion chamber 110 is released into the pellets. Blocks heat (H) transfer so that it does not move to the hopper 210 side.

Figure 4 is a side view illustrating the process of blocking a backfire of the front backfire blocking plate 330 when the opening/closing control plate 230 is opened.

The front fire prevention plate 330 is formed to be inclined from the prevention plate body 310 at an inclination angle θ1 in the range of 30 to 45 degrees. As shown in Figure 4, when the opening/closing control plate 230 is opened, the pellet (P) dropped by its own weight through the pellet supply hole 320 falls downward. At this time, the pellets (P) that hit the front fire blocking plate 330 flow down along the lower slope of the pellet supply pipe 220 and are supplied to the pellet combustion plate 140.

The pellets (P) that hit the front fire blocking plate (330) fall to the bottom and are discharged while gradually spreading downward. Accordingly, an empty space (S1) in which the pellet (P) cannot be moved is formed in the lower part of the front fire blocking plate (330).

The heat (H) generated when the pellets (P) of the pellet combustion plate 140 are burned is moved along the upper inner surface of the pellet supply pipe 220 due to the hot temperature. At this time, the heat (H) hits the front fire blocking plate 330 provided at an angle along the upper side of the pellet supply pipe 220 and is blocked from moving further upward.

In addition, as the heat (H) moves through the empty space (S1) on the back of the front flash fire blocking plate (330), there is no medium to transfer to, thereby reducing the risk of a flame being generated by the heat (H). As a result, heat (H) is transferred to the pellet hopper 210 above the front flashback blocking plate 330, thereby preventing flashbacks that generate flames.

The front fire blocking plate 330 is provided in a semicircular or triangular shape whose area gradually narrows from the bottom to the top as shown in FIG. 2 to prevent the propagation of heat (H) moving from the bottom to the top. It is desirable to be

If the inclination angle (θ1) of the front fire blocking plate 330 is less than 30°, the effect of blocking the upward movement of heat (H) can be improved, but the pellets (P) supplied from the pellet hopper 210 are not connected to the pellet supply pipe 220. The pellet (P) may become stagnant by preventing movement to .

In addition, when the inclination angle (θ1) of the front fire blocking plate 330 becomes greater than 45°, the distance between the front fire blocking plate 330 and the upper surface of the pellet supply pipe 220 becomes closer, so the side empty space (S1) narrows, causing heat. (H) can be delivered to the pellet (P) inside the pellet supply pipe 220.

Meanwhile, the rear fire blocking plate 340 is disposed opposite to the front fire blocking plate 330. Figure 5 is a side view illustrating the process of blocking a backfire of the rear fire blocking plate 340 when the opening/closing control plate 230 is closed.

The rear fire prevention plate 340 is formed to be vertically bent from the prevention plate body 310. As a result, when the opening/closing control plate 230 is closed, the pellets P remaining between the front fire blocking plate 330 and the rear fire blocking plate 340 are vertically directed downward along the vertical surface of the rear fire blocking plate 340. It falls hard.

As a result, the pellet P, which is a heat transfer medium, does not remain between the front fire blocking plate 330 and the rear fire blocking plate 340, and an upper empty space S2 is formed.

The pellets (P) that fall vertically by the rear flashback blocking plate (340) flow obliquely downward and are supplied to the pellet combustion plate (140).

When the flame (F) inside the combustion chamber (110) is reduced and the internal suction power is weakened, heat (H) may be moved along the upper inner surface of the pellet supply pipe (220). The increased heat (H) hits the front fire-blocking plate 330 and then hits the rear fire-blocking plate 340, and its transmission is blocked by the upper empty space (S2).

As a result, heat (H) is transferred to the pellet hopper 210 to prevent backfire from occurring.

As shown enlarged in FIG. 3, the rear flashback blocking plate 340 is formed in the shape of a semicircle or inverted triangle with an area narrowing from the top to the bottom so that the pellet P can quickly fall to the bottom.

The operation process of the pellet stove (1) according to the present invention having this configuration will be described with reference to FIGS. 1 to 5.

As shown in Figure 1, when the user moves the opening/closing plate 230 of the pellet supply unit 200 to open the pellet moving hole 241, the pellets (P) of the pellet hopper 210 move through the pellet supply pipe 220. It is input into the pellet combustion plate 140 of the combustion chamber 110.

When the pellets (P) of the pellet combustion plate 140 are ignited, the pellets (P) are burned in the combustion chamber 110 and a flame (F) is generated. The heat generated by the flame (F) heats the surface of the combustion chamber (110) and heats the space where the pellet stove (1) is located.

The combustion gas (C) generated by combustion of the pellets (P) is discharged to the outside through the flue 170, and the ash (B) remaining on the pellet combustion plate 140 after combustion of the pellets (P) is discharged to the lower housing ( It falls into the ash catch 150 of 120 and is accommodated.

The pellets (P) introduced into the pellet hopper 210 are moved downward by their own weight and are slowly supplied to the pellet combustion plate 140 as the pellets (P) are burned, so that all of the pellets (P) stored in the pellet hopper 210 are Combustion of the pellets (P) continues continuously until they are consumed.

In this process, combustion of the pellets (P) proceeds for a long time, and the temperature inside the combustion chamber (110) decreases, lowering the discharge pressure at which the combustion gas (C) is discharged to the outside. 220).

As shown in FIG. 4, when the heat (H) of the combustion chamber 110 flows into the pellet supply pipe 220 with the opening/closing control plate 230 open, the heat (H) with a high temperature flows into the pellet supply pipe 220. It moves in the reverse direction along the upper inner wall.

At this time, the supply of pellets (P) to the upper inner wall side of the pellet supply pipe 220 is blocked by the front flashback blocking plate 330, so between the front flashback blocking plate 330 and the upper inner wall of the pellet supply pipe 220. A side empty space (S1) is formed.

Since the heat (H) flowing into the pellet supply pipe 220 moves along the empty space (S1), there is no medium for heat transfer, so the temperature is lowered. In addition, the column H is blocked by the front fire blocking plate 330 and is blocked from moving upward. As a result, heat (H) is blocked from moving toward the pellet hopper 210 through the pellet moving hole 241, thereby preventing backfire from occurring in the pellet hopper 210.

Meanwhile, as shown in FIG. 5, when the user closes the opening/closing control plate 230, the pellets (P) remaining between the opening/closing control plate 230 and the prevention plate body 310 change to the inclination angle of the rear flashback blocking plate 340. is quickly moved to the bottom. Then, the pellets (P) are arranged obliquely along the height direction of the pellet supply pipe 220 and supplied to the pellet combustion plate 140.

As a result, no pellets (P) exist in the upper area of the pellet supply pipe 220, and an upper empty space (S2) is formed between the front fire blocking plate 330 and the rear fire blocking plate 340. After heat (H) flows into the pellet supply pipe 220 and moves along the upper area of the pellet supply pipe 220, the pellets (P) do not remain in the upper empty space (S2), so the heat (H) is transferred to the pellets (P). This can prevent backfires from occurring.

As seen above, the pellet stove according to the present invention is equipped with a flashback prevention plate in the boundary area between the pellet supply pipe and the pellet hopper to block combustion heat from being transferred to the pellet hopper even if the combustion heat is transferred to the pellet supply pipe when the exhaust pressure inside the combustion chamber is lowered. This can prevent backfire from occurring in the pellet hopper.

In particular, the front fire prevention plate and the rear fire prevention plate formed on the flashback prevention plate form an empty space that blocks the transfer of heat when the opening and closing plate is opened and closed, respectively, and blocks heat from being transferred to the pellet hopper, causing a flashback. can be effectively prevented.

The embodiments of the pellet stove of the present invention described above are merely illustrative, and those skilled in the art will appreciate that various modifications and other equivalent embodiments are possible therefrom. There will be. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

1: Pellet stove 100: Stove body
110: combustion chamber 111: air supply hole
120: lower housing 130: door
140: Pellet combustion plate 150: Ash catcher
160: pellet inlet 170: flue
180: Sweet potato oven 200: Pellet supply unit
210: Pellet hopper 211: Support plate flange
220: Pellet supply pipe 230: Opening and closing plate
231: Handle 240: Intermittent plate support frame
241: pellet moving hole 300: backfire prevention plate
310: Prevention plate body 320: Pellet supply hole
330: Front fire-blocking plate 340: Rear fire-blocking plate
B:ash
F: Flame
H: heat
P: Pellet
S1: side empty space
S2: Upper empty space

Claims (3)

A stove body 100 with a pellet combustion plate 140 disposed on the bottom and a combustion chamber 110 with a pellet inlet 160 on the rear wall;
A pellet supply pipe 220 coupled to the pellet inlet 160 at the rear of the stove main 100 and supplying the pellets (P) accommodated in the pellet hopper 210 to the pellet combustion plate 140 by its own weight, A pellet supply unit 200 that moves back and forth in the coupling area of the pellet hopper 210 and the pellet supply pipe 220 and has an opening/closing intermittent plate 230 that regulates the supply of pellets;
It is provided between the opening/closing control plate 230 and the pellet supply pipe 220 so that the heat inside the combustion chamber 110 is transferred to the pellet hopper 210 along the pellet supply pipe 220 and prevents backfire from occurring. It includes a flashback prevention plate (300),
The pellet supply pipe 220 is formed in the form of a tube with a certain length and is provided in an inclined form so that the pellets (P) can be supplied by their own weight,
The flashback prevention plate 300 is,
A plate-shaped prevention plate body 310 with a pellet supply hole 320 formed on the plate surface;
It is formed on one side of the pellet supply hole 320 of the prevention plate body 310 to be inclined at a certain angle toward the bottom to block heat from being transferred to the pellet hopper 210 when the opening and closing plate 230 is open. A front fire blocking plate 330 forming a side empty space S1;
The other side of the pellet supply hole 320 of the prevention plate body 310 is bent perpendicular to the direction facing the front fire blocking plate 330, so that when the opening/closing control plate 230 is closed, heat is transferred to the pellet hopper. It includes a rear fire blocking plate (340) forming an upper empty space (S2) that blocks transmission to (210),
The front fire-blocking plate 330 is formed to be inclined at an inclination angle θ1 in the range of 30 to 45 degrees from the prevention plate body 310 and is formed in a semicircular or triangular shape with an area expanding toward the bottom, and the rear fire-blocking plate (340) is a pellet stove characterized in that it is formed in a semicircle or inverted triangle shape with the area narrowing toward the bottom. delete delete

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