KR20200127764A - Flame tube and oil boiler using same - Google Patents

Abstract

A flame tube according to the present invention includes: an upper flame tube that is provided to pass through a combustion chamber cover covering an upper end of a combustion chamber providing an inner space in which a combustion reaction takes place, and has an upper coupling unit in a region adjacent to a lower end positioned in the inner space; and a lower flame tube that is provided to define a tube space by enclosing a partial space in which a mixture material of sprayed oil-type fuel and injected air is ignited in the inner space, has a lower coupling unit coupled to the upper coupling unit in a region adjacent to the upper end, and has an opened lower end.

Description

Flame tube and oil boiler using it {FLAME TUBE AND OIL BOILER USING SAME}

The present invention relates to a flame tube and an oil boiler using the same.

A boiler is a device that heats a desired area by heating fluid in a container. Therefore, in order to heat the heating water of the boiler, the boiler generates a flame and combustion gas by causing a combustion reaction using a burner, and generally has a structure that can heat the heating water using the heat transmitted from the flame and the heat transmitted by the combustion gas. Have.

The burner needs fuel for the combustion reaction to occur. As fuel, liquefied petroleum gas or liquefied natural gas, which is a kind of fossil fuel, may be used, but oil type diesel or kerosene may be used.

When a burner causes a combustion reaction using oil type fuel, it is difficult to cause a combustion reaction by controlling the amount of fuel such as gas. In addition, when using liquid fuel, yellow flames are likely to be formed by soot caused by incomplete combustion. When soot is generated, passages inside the boiler provided to allow combustion gas to flow through a predetermined path may be blocked. If the flue gas does not flow smoothly, the boiler may not operate normally.

Meanwhile, in such a boiler, a flame tube is disposed in a space where a flame is generated by a combustion reaction to assist the generation of the flame. These flame tubes can be overheated by a hot flame. Therefore, it is common to configure the flame tube with an expensive heat-resistant material, but when forming the flame tube as an integral type, it is too uneconomical, and there is a problem that excessive heat is transmitted to other components constituting the boiler.

The present invention has been conceived to solve such problems, and provides a blue flame type oil boiler for generating a blue flame and a flame tube used therefor to solve the above-described problems.

The flame tube according to an embodiment of the present invention is provided to pass through a combustion chamber cover covering an upper end of a combustion chamber providing an internal space in which a combustion reaction occurs, and an upper coupling portion having an upper coupling portion in a region adjacent to the lower end positioned in the internal space. Flame tube; And a lower portion provided to define a tube space by enclosing a partial space in which a mixture material of sprayed oil-type fuel and injected air is ignited in the inner space, and coupled to the upper coupling portion in a region adjacent to the upper end. It has a coupling part, and includes a lower flame tube with an open lower end.

An oil boiler according to an embodiment of the present invention includes a combustion chamber providing an internal space in which a combustion reaction occurs; A combustion chamber cover covering the opened upper end of the combustion chamber; A burner comprising a fuel nozzle for spraying oil-type fuel into the internal space of the combustion chamber, an air nozzle for injecting air into the internal space, and a spark plug igniting a mixture of the sprayed fuel and the injected air ; A heat exchanger for heating the heating water by heat derived from the combustion reaction; A tube space is defined by surrounding a partial space in which a portion of the fuel nozzle and a portion of the air nozzle are accommodated in the inner space, and includes a flame tube portion whose lower end is opened, and the flame tube portion penetrates the combustion chamber cover, And an upper flame tube having an upper coupling part in a region located in the inner space, and a lower flame tube having a lower coupling part provided to be coupled to the upper coupling part and located in the inner space, and having an open lower end.

Accordingly, a blue flame is generated while using an oil-type fuel, so that the amount of nitrogen oxide generated during operation of the oil boiler may be reduced.

While it is possible to easily assemble the flame tube, corrosion or damage may not occur when the flame tube is heated.

Heat transfer to the combustion chamber cover by the flame tube can be reduced.

1 is a perspective view of an oil boiler according to an embodiment of the present invention.
2 is a diagram illustrating a situation in which a case of an oil boiler according to an embodiment of the present invention is removed.
3 is an exploded perspective view of an oil boiler according to an embodiment of the present invention.
4 is a longitudinal sectional view of an oil boiler according to an embodiment of the present invention.
5 is a perspective view including a longitudinal section of an oil boiler according to an embodiment of the present invention.
6 is an exploded perspective view of a flame tube part of an oil boiler according to an embodiment of the present invention.
7 is an enlarged longitudinal cross-sectional view illustrating a part of a flame tube portion of an oil boiler according to an embodiment of the present invention.
8 is a cross-sectional view of a portion of an oil boiler that sends air to a burner according to an embodiment of the present invention.
9 is an exploded perspective view of a burner assembly of an oil boiler according to an embodiment of the present invention.
10 is an exploded perspective view of a damper part of an oil boiler according to an embodiment of the present invention.
11 is a view showing an area in which a pressure relief hole of an oil boiler is located according to an embodiment of the present invention.
12 is an exploded perspective view of a fuel pump part of an oil boiler according to an embodiment of the present invention.
13 is a cross-sectional view of a supply pipe of an oil boiler according to an embodiment of the present invention.
14 is a perspective view showing various types of flue connections to an oil boiler according to an embodiment of the present invention.
15 is a cross-sectional view showing a coupling structure between a flue connection adapter and a flue of an oil boiler according to an embodiment of the present invention.
16A to 16D are cross-sectional views of a trap part of an oil boiler according to an embodiment of the present invention.
17 is a perspective view of a burner housing of an oil boiler according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs an understanding of the embodiment of the present invention, a detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

1 is a perspective view of an oil boiler 1 according to an embodiment of the present invention. 2 is a view showing a situation in which the case 10 of the oil boiler 1 according to an embodiment of the present invention is removed. 3 is an exploded perspective view of an oil boiler 1 according to an embodiment of the present invention. 4 is a longitudinal sectional view of an oil boiler 1 according to an embodiment of the present invention. 5 is a perspective view including a longitudinal section of an oil boiler 1 according to an embodiment of the present invention.

Referring to the drawings, the oil boiler 1 according to an embodiment of the present invention is provided in a form in which other components are embedded in a case space 14 within a case 10.

Case(10)

The case 10 contains the outer cylinder 21 and may be defined by several walls. In one embodiment of the present invention, the case 10 is formed in a rectangular parallelepiped shape, and the upper wall 11 located on the upper side, the lower wall 13 disposed opposite the upper wall 11, and four connecting the upper and lower surfaces The case 10 is formed in a manner in which the side wall 12 defines the case space 14 therein, but the number and arrangement of the walls are not limited thereto. Each side wall 12 may extend downward from the rectangular upper wall 11.

In the drawing, it is shown that the handle 1212 is formed on the first side wall 121, but the handle 1212 may also be disposed on the third side wall 123 opposite to the first side wall 121. In the drawings, the horizontal direction means a direction parallel to the plane defined by the illustrated x and y axes, and the vertical direction means a direction defined by the z axis.

Handles 1212 may be provided on two side walls 12 of the side walls 12 facing each other in any one of the horizontal directions. Therefore, it is easy for the user to move the oil boiler 1 by holding and moving the handle 1212.

The control unit 15 may be disposed on the sidewall 12. The control unit 15 may include an operation unit 151 and a processor 152. The operation unit 151 may include a mechanical structure that can be operated by a user, a display device capable of expressing the state of the oil boiler 1, and may be electrically connected to the processor 152. In the exemplary embodiment of the present invention, it is illustrated that the control unit 15 is disposed on the second sidewall 122, but the position thereof is not limited thereto.

The processor 152 is a component that is electrically connected to each component of the boiler to perform control. The processor 152 is a component including an element capable of a logical operation that performs a control command, and may include a central processing unit (CPU) or the like. The processor 152 is connected to components such as the differential pressure acquisition unit 47, the blower 44, and the fuel pump unit 45, and can transmit a signal according to a control command to each of the components, and various sensors or Information obtained by being connected to the acquisition units may be transmitted in the form of a signal. Since the processor 152 may be electrically connected to each of the components, the processor 152 may be connected by a wire or may have a communication module capable of wireless communication to communicate with each other.

The control command executed by the processor 152 may be stored in a storage medium and used, and the storage medium may be a device such as a hard disk drive (HDD), a solid state drive (SSD), a server, a volatile medium, a nonvolatile medium, etc. However, the type is not limited thereto. In addition to this, data required for the processor 152 to perform a task may be further stored in the storage medium.

In addition, the expansion tank 16 may be accommodated in the case space 14. The expansion tank 16 is a container connected to the outer cylinder 21 and capable of receiving volume expansion of heating water.

External cylinder (21)

The outer cylinder 21 is a cylindrical element and accommodates the combustion chamber 22, the diaphragm 24, and the pipe 23 in the hollow 210, which is a cylindrical space formed therein. The outer cylinder 21 may be formed of stainless steel. Components embedded in the outer cylinder 21 are configured integrally with the outer cylinder 21, but are made of stainless steel in the same manner, so that the overall oil boiler 1 can be lightened.

Openings are formed at both ends of the outer cylinder 21, and hollows 210 communicating with the openings at both ends are provided inside. An outer cylinder inlet 211 is provided at the lower side for introducing the heating water into the hollow 210, and an outer cylinder outlet 212 is provided at the upper side for discharging the heating water from the hollow 210. The heating water introduced into the outer cylinder inlet 211 flows along the hollow 210 and is discharged through the outer cylinder outlet 212. While the heating water flows in the hollow 210, the heating water is heated by receiving thermal energy from the high-temperature pipe 23 and the combustion chamber 22. The heated heating water is discharged to the outlet, passing through a heating pipe (not shown) to perform heating.

The outer cylinder 21 may include an outer cylinder extension 213 which is a wall of the outer cylinder 21 by extending in a vertical direction, and the lower end and the upper end of the outer cylinder extension 213 may be formed in a cylindrical shape, respectively.

Combustion chamber (22)

The opening on the upper end side of the outer cylinder 21 is covered by the combustion chamber 22. Here, the words that the combustion chamber 22 covers the opening may mean that the rim of the opening located at the upper end of the outer cylinder 21 is completely covered from the outside. However, with the rim of the opening protruding toward the outside, the combustion chamber 22 is inserted into the opening of the outer cylinder 21 and coupled to the inner peripheral surface of the hollow 210 of the outer cylinder 21, thereby blocking the hollow 210 from the outside. Even if it is combined in such a way, it can be expressed as covering the opening.

The combustion chamber 22 is a cylindrical component covering an opening on the upper end side of the outer cylinder 21. The combustion chamber 22 has an internal space 220, and a burner 42 inserted into the internal space 220 may cause a combustion reaction. A combustion reaction occurs in the inner space 220 to generate a flame and combustion gas.

The combustion chamber 22 formed in a cylindrical shape extends from the upper end side of the outer cylinder 21 toward the lower end side of the outer cylinder 21, but does not reach the lower end of the outer cylinder 21. A burner 42 is disposed in the internal space 220 of the combustion chamber 22 to heat the combustion chamber 22 to transfer heat to the heating water. In addition, the burner 42 can generate combustion gas by heating the gas contained in the combustion chamber 22. The combustion gas generated due to heating of the heat source may be discharged from the combustion chamber 22 to the outside through the fire tube 23. In this process, the combustion gas passing through the pipe 23 may heat the heating water passing through the hollow 210.

The combustion chamber 22 includes an inner bottom surface 222. The surface located at the lower end of the combustion chamber 22 becomes the inner bottom surface 222. In the inner bottom 222, a bottom through hole 2221 through which a pipe 23 to be described later can pass may be formed. That is, the inner bottom surface 222 may be in communication with the outside through the connection 23. The inner bottom 222 may be detachable from the combustion chamber 22, or the combustion chamber 22 and the inner bottom 222 may be integrally formed. The inner bottom surface 222 may be formed in a horizontal circle, but the shape is not limited thereto.

The upper end of the combustion chamber is formed with a diameter corresponding to the upper end of the outer cylinder 21, and is combined with the upper end of the outer cylinder 21 to close the upper end of the outer cylinder 21 to form a hollow 210 of the sealed outer cylinder 21. have. However, the diameter of the combustion chamber extension extending from the upper end of the outer cylinder 21 to the lower end of the outer cylinder 21 may be formed to be smaller than the diameter of the outer cylinder 21. Accordingly, the combustion chamber 22 may have a combustion chamber connecting portion 2211 having a tapered shape while extending from the combustion chamber extension to the upper end of the combustion chamber 22. The inner side surface of the combustion chamber extension part may be the inner side surface 221 of the combustion chamber 22.

The combustion chamber 22 and the outer cylinder 21 may have a cylindrical shape, and the diameter of the combustion chamber extension portion is formed smaller than the diameter of the outer cylinder 21, so that the combustion chamber extension portion may be spaced apart from the inner surface of the outer cylinder 21. Accordingly, a flow space may be formed between the inner surface of the outer cylinder 21 and the outer surface of the combustion chamber extension part.

Heating water may flow from the hollow 210 through the flow space. The outlet of the outer cylinder 21 formed on the upper end of the outer cylinder 21 may communicate with the flow space. Accordingly, the heating water flowing in the flow space may be guided to the outer cylinder outlet 212 and discharged. The heating water flowing in the flow space finally receives heat from the combustion chamber 22 heated by the flame of the burner 42 and is discharged through the outer cylinder outlet 212 formed in the outer cylinder 21.

The opening formed at the top of the combustion chamber may be covered by the combustion chamber cover 28. The combustion chamber cover 28 may pass through the components of the burner 42 to be described later.

Heat exchanger (linkage (23), diaphragm (24)) and lower cover (29)

The oil boiler 1 according to an embodiment of the present invention may include a heat exchanger. The heat exchanger may include a fire tube 23 and a diaphragm 24, and these components may be formed surrounded by an outer cylinder 21, a lower cover 29 and a combustion chamber 22. When the outer cylinder 21 is formed in a cylindrical shape, it becomes a tubular heat exchanger. The combustion gas passes through the fire tube 23, and heating water flows around the fire tube 23 in the hollow 210, and heat exchange is performed. The combustion gas may pass downward through the heat exchanger, thereby forming a top-down heat exchanger.

The lower cover 29 included in the oil boiler 1 covers the opening at the lower end of the outer cylinder 21, and the fire tube 23 may pass through. Accordingly, heating water may be located in a space defined by the lower cover 29, the combustion chamber 22, and the outer cylinder 21 among the hollows 210.

A plurality of pipes 23 are disposed between the lower cover 29 and the combustion chamber 22, and are located in the inner space 220 of the combustion chamber 22 and in the space of the condensate receiver 31 formed under the lower cover 29. It is a tubular component that communicates. Accordingly, the plurality of pipes 23 guide the combustion gas generated in the combustion chamber 22 to the lower side of the lower cover 29 through the hollow 210 of the outer cylinder 21. According to an embodiment of the present invention, the linkage 23 extends along the vertical direction. The heated combustion gas moves downward (D) through the pipe (23). In the process of moving the combustion gas, heat exchange between the heating water moving upward through the hollow 210 of the outer cylinder 21 and the combustion gas moving downward (D) is performed through the pipe 23.

The pipe 23 is composed of a plurality, and may be disposed radially from the center of the circular cross-section of the outer cylinder 21 and the combustion chamber 22. The center of the circular cross section may be the same as the center of the disc-shaped diaphragm 24 to be described later. Therefore, as in an embodiment of the present invention, the correlates 23 may be disposed along one circumference at a predetermined interval. However, the pipes 23 may be arranged at regular intervals along two circumferences having different diameters and arranged in two stages, and the arrangement is not limited thereto.

The pipe 23 can be provided in the type of a flat tube. Specifically, when the widths defined in the two directions extending perpendicular to each other on the horizontal plane are referred to as the first width and the second width, the pipe 23 is less than the first width of the inner flow path through which the combustion gas passes. The second width may be formed in a narrow shape. Since the outer cylinder 21 may be formed in a cylindrical shape, the first width may be disposed in parallel with the radial direction of the cylinder, and the second width may be disposed in parallel with the circumferential direction of the cylinder.

A turbulator 26 may be disposed in the pipe 23. The turbulator 26 is a device that turbulizes the flow of flue gas passing through the fire tube 23. Specifically, the turbulator 26 includes a plate-shaped portion 261 extending in a vertical direction, a plurality of through portions 262 formed through the plate-shaped portion 261, and protruding from the plate-shaped portion 261. It may include a plurality of protrusions 263. Since the plate-shaped portion 261 inserted along the pipe 23 has a plurality of penetrating portions 262 and protrusions 263, the flue gas passing through the pipe 23 is disturbed or promoted to become turbulent. do.

When the turbulator 26 is inserted from the top of the pipe 23 downward (D), the turbulator 26 is from the upper end of the plate-shaped portion 261 so as to be caught on the inner bottom surface 222 of the combustion chamber 22. It may further include a locking portion 264 protruding in any one of the horizontal directions. The locking part 264 protrudes from the plate-shaped part 261 in any one of the horizontal directions, and is bent to more stably fix the plate-shaped part 261 to the inner bottom surface 222 of the combustion chamber 22. In addition, since the turbulator 26 is formed in this way, it can be easily separated from the inner bottom surface 222, and cleaning of the oil boiler 1 becomes easy.

A diaphragm 24 is disposed in the hollow 210 of the outer cylinder 21 formed inside the outer cylinder 21. The diaphragm 24 is a constituent element formed in a disk shape, and may be disposed in any one of the horizontal directions between the lower cover 29 and the combustion chamber 22.

A plate through hole is formed in the diaphragm 24 at a position corresponding to the position of the pipe 23 to allow the pipe 23 to pass. As the diaphragm 24 divides the hollow 210 into a plurality of regions, a flow path through which the heating water flowing inside the hollow 210 moves may be formed. A plurality of diaphragms 24 are arranged as shown, so that a flow path of the heating water can be more complicatedly formed.

As the tubular heat exchanger having this structure is formed, it may have higher thermal efficiency than other heat exchangers such as an exemplary upward combustion type heat exchanger. Therefore, the temperature of the combustion gas finally discharged may be lower than the temperature of the combustion gas discharged from the exemplary heat exchanger. Accordingly, the flue (53 in FIG. 15) coupled to the oil boiler 1 in order to finally export the combustion gas to the outside may be formed of plastic instead of metal.

Condensate tray(31)

The condensate receiver 31 is a component that receives and discharges condensed water, and is located under the lower cover 29. Accordingly, condensed water falling from the lower surface of the lower cover 29 or the inside of the pipe 23 can be accommodated.

The condensed water receiver 31 of the oil boiler 1 according to an embodiment of the present invention includes a receiver 311 having a receiver space 3110 between the lower cover 29 and the lower cover 29 to accommodate the falling condensate. Including, doedoe connected from the receiving part 311 may further include a separation part 312 connected to the duct 33. In addition, a condensed water pipe 341 for transferring condensed water to the trap 32 may be disposed by connecting the separating unit 312 and the trap unit 32. In the separating unit 312, the condensed water is transmitted to the trap unit 32 through the condensed water pipe 341 by its own weight, and the combustion gas is directed upward through the duct 33.

A silencer 35 may be disposed in the separating part 312. A situation in which the silencer 35 is disposed on the receiving part 311 may be considered, but in this case, there is a problem that the height of the receiving part 311 in the vertical direction increases. Accordingly, as the silencer 35 is disposed on the receiving portion 311 to be connected to the duct 33, the height of the receiving portion 311 can be shortened and the height of the entire oil boiler 1 can be shortened.

Specifically, the silencer 35 is formed of a porous plate, and generates resistance to the flow of the combustion gas discharged to the duct 33 through the receiving part 311. As resistance to the flow of combustion gas is generated, the impeller (441 in Fig. 11) rotates at a higher speed than the speed at which the impeller (441 in Fig. 11) included in the blower 44 is rotated in the absence of the silencer 35 Control by the processor 152 may be made so as to be performed. Therefore, a more air flow rate is provided to the air nozzle 422 through the blower 44, so that the combustion gas can be easily pushed out and discharged through the pipe 23 and the duct 33, through which air or combustion gas It can prevent backflow and reduce ignition noise. How the processor 152 controls the blower 44 by generating resistance to the flow of the flue gas will be described later in the description of the air supply pipe 51.

As the ignition noise is reduced, it is possible to have a combustion chamber 22 of a size smaller than the size of the combustion chamber 22 of the oil boiler 1, which cannot reduce the ignition noise, and the height of the combustion chamber 22 can be shortened. It can have the effect of shortening the height of the oil boiler (1).

Duct(33)

The separating part 312 is connected to the tubular duct 33 extending upward, so that the combustion gas can be discharged to the outside through the duct 33. The duct 33 is not formed to extend in only one direction, but extends in a vertical direction and includes a duct straight portion 331 through which combustion gas discharged from the outer cylinder 21 flows into, and an outlet of the duct 33 It may include a flue connection adapter 333 to be formed, and a duct horizontal portion 332 extending in one of the horizontal directions to connect the straight duct portion 331 and the flue connection adapter 333.

The duct horizontal portion 332 may extend in a horizontal direction from an upper end of the duct straight portion 331. The flue connection adapter 333 is connected to a position on the duct horizontal portion 332 spaced from the duct straight portion 331 in any one of the horizontal directions. Accordingly, the duct straight portion 331 and the flue connection adapter 333 may be spaced apart from each other along any one of the horizontal directions.

The overall height of the oil boiler 1 in the vertical direction may be affected by the length of the duct 33. The duct 33 is formed in this way, and the overall height in the vertical direction can be reduced while increasing the overall length.

The duct 33 includes a duct straight portion 331 and a flue connection adapter 333, and includes a duct horizontal portion 332 connecting it in one of the horizontal directions, and is not formed straight in one direction, and is eccentric. Can have an unbalanced structure. For example, while the flue (53 in FIG. 15) is coupled to the inlet of the duct 33, there may be a case where the flue connection adapter 333 is pressed downward (D). In this situation, both ends of the duct horizontal portion 332 are connected to the flue connection adapter 333 receiving force, respectively, and the duct straight portion 331 fixed to the separating portion 312, and thus receive a bending moment. The force applied when the flue (53 in FIG. 15) is combined is transmitted to the straight duct 331 through the horizontal duct 332, causing damage to the straight duct 331 or the horizontal duct 332. I can.

To prevent such damage, the duct 33 may further have a duct support 334. The duct support portion 334 may be formed to extend outward from the duct straight portion 331, and may be connected to the duct horizontal portion 332. The duct support part 334 may be seated on the fixing bracket 17 which is fixed to the case bracket 1233 protruding inward from the inner surface of the case 10 to fix the outer cylinder 21. The duct support part 334 may be seated on the fixing bracket 17, but may be fixed using a fastener even if it is not seated. Likewise, the fixing bracket 17 may also be seated on the case bracket 1233, but may be fixed using a fastener even if not seated.

The fixing bracket 17 may be provided on the outer surface of the outer tube extension part 213 of the outer tube 21. As the duct support 334 is fixed to the fixing bracket 17, even when the above-described force is applied to the duct 33, the fixing bracket 17 or the case bracket 1233 through the duct support 334 The duct 33 is supported, so that damage can be prevented.

Burner(42)

The burner 42 is a component that ignites oil-type fuel and air to form flames and combustion gases. The burner 42 may include a fuel nozzle 421, an air nozzle 422, and a spark plug 423 to enable such an action.

The fuel nozzle 421 is a nozzle that sprays oil-type fuel into the internal space 220 of the combustion chamber 22. Therefore, the fuel nozzle 421 is connected to the fuel pump unit 45 through the fuel supply pipe 4512, so that the oil type fuel can be delivered from the fuel pump unit 45, and the fuel pump 451 pressurizes the fuel. At that pressure, fuel is sprayed into the inner space 220. Accordingly, the flow rate at which the fuel nozzle 421 sprays fuel may be determined by the fuel pump unit 45. The fuel nozzle 421 may be disposed through the combustion chamber cover 28. The sprayed oil-type fuel may be vaporized by the high-temperature combustion gas circulated through the recirculation hole 413 of the flame tube part 41 to be described later.

The air nozzle 422 injects air into the internal space 220 of the combustion chamber 22. The air nozzle 422 may be formed to surround the fuel nozzle 421. Air may be injected through an air injection port formed between the outer surface of the fuel nozzle 421 and the inner surface of the air nozzle 422. The lower end of the fuel nozzle 421 may have a shape that becomes narrower toward the lower (D), and the air nozzle 422 may also have a form that the lower end of the fuel nozzle 421 becomes narrower toward the lower (D).

The flow rate of the air injected by the air nozzle 422 and the flow rate of the fuel sprayed by the fuel nozzle 421 can maintain a predetermined ratio. The ratio of the flow rate of the fuel sprayed by the air nozzle 422 and the fuel nozzle 421 may be a ratio suitable for generating a blue flame. The air flow rate, which is the flow rate of air injected by the air nozzle 422 and the fuel flow rate, which is the flow rate of the fuel sprayed by the fuel nozzle 421 may be controlled by the processor 152. The air flow rate supplied to the air nozzle 422 can be adjusted by controlling the blower 44 that supplies air to the air nozzle 422 by the processor 152. The fuel flow rate supplied to the fuel nozzle 421 can be adjusted by controlling the fuel pump unit 45 for supplying fuel to the fuel nozzle 421 by the processor 152.

Burner 42 includes a spark plug 423. The spark plug 423 is a component that ignites a mixed material in which the sprayed fuel and the injected air are mixed. The spark plug 423 may cause an electric spark to ignite the mixed material. After the oil-type fuel is sprayed, it is vaporized by the circulated combustion gas, and as an electric spark is generated in a situation where the vaporized fuel and air are mixed to form a mixed material, a blue flame may be generated. Therefore, it can be a blue flame type oil boiler (1).

The burner 42 may further include a burner fixing plate 424 to which the spark plug 423, the fuel nozzle 421 and the air nozzle 422 may be fixed. The burner fixing plate 424 is configured in a plate shape, and is inserted and fixed to the inside of the upper flame tube 412 to be described later, so that the air blown by the blower 44 into the burner space (460 in FIG. 8) is air nozzle 422 ), it is possible to block a large part from moving to the flame tube part 41.

The burner fixing plate 424 included in the burner 42 and the burner housing 46 forming the burner space 460 between the burner fixing plate 424 and the combustion chamber cover 28 are described with reference to FIG. 8. It will be described later in the description.

Flame tube part (41)

6 is an exploded perspective view of the flame tube part 41 of the oil boiler 1 according to an embodiment of the present invention. 7 is a longitudinal cross-sectional view showing an enlarged part of the flame tube part 41 of the oil boiler 1 according to an embodiment of the present invention.

The flame tube part 41 will be described with further reference to FIGS. 6 and 7. The flame tube part 41 is a part where the flame generated from the burner 42 is located. The flame tube part 41 may include flame tubes 411 and 412 and a recirculation hole 413.

The recirculation hole 413 is an opening formed in the flame tubes 411 and 412 and is formed so that combustion gas can pass through the recirculation hole 413. When fuel and air are ejected at high pressure from the inside of the flame tube part 41 through the nozzle 42, the surrounding pressure is lowered by the flow of the fluid sprayed at the high pressure, and accordingly, through the recirculation hole 413 The combustion gas that was located outside the flame tube part 41 may flow into the inside of the flame tube part 41 whose pressure is lowered. A recirculation hole 413 is formed through the flame tube so that the combustion gas in the internal space 220 of the combustion chamber 22 flows from the outside of the flame tubes 411 and 412 into the tube space 4110 located inside.

The recirculation hole 413 may be formed in a shape of a long hole extending along the circumferential direction of the upper flame tube 412 to be described later. In addition, a plurality of recirculation holes 413 may be provided, and may be disposed to be spaced apart from each other along the circumferential direction of the upper flame tube 412.

As the combustion gas is generated by the burner 42 and flows downward (D), it meets the combustion guide 27, and its flow direction is reversed upward. The combustion gas whose flow direction is reversed upward may reach the outside of the flame tube, and may be introduced into the tube space 4110 through the recirculation hole 413 so that the combustion gas may be circulated.

The tube space 4110 is a space provided to ignite a mixture material of fuel and air, and in the inner space 220, a partial space in which a mixture material of sprayed oil-type fuel and injected air is ignited is a flame tube part ( 41) can be defined by enclosing. A portion of the fuel nozzle 421 and the air nozzle 422 may be accommodated in the tube space 4110.

As the high-temperature combustion gas is circulated, it is possible to vaporize the oil-type fuel that is sprayed by the fuel nozzle 421 and exists as a droplet. Since oil-type fuel is used and the state of the fuel is converted into gaseous state and ignited, similar to a boiler using gas-type fuel, it generates a high-temperature blue flame instead of a low-temperature yellow flame and achieves high fuel efficiency. I can. It is also possible to use configurations similar to boilers that use gaseous fuel.

As the combustion gas circulates, the temperature of the flame generated inside the flame tube may be lowered compared to the case of lighting a fire in a situation where only air and fuel are present. Because the temperature of the flame is lowered, the amount of nitrogen oxides generated at high temperatures can be reduced.

The flame tubes 411 and 412 surround a region in which fuel is sprayed from the fuel nozzle 421 in the inner space 220 and have a lower end open.

The flame tube part 41 may have a first tube part 4111, a second tube part 4112, and a connection tube part 4113 connecting the same. Each of these tube portions may be formed on the lower flame tube 411.

Specifically, the first tube portion 4111 and the second tube portion 4112 are formed in a cylindrical shape, and the first tube portion 4111 may be positioned above the second tube portion 4112. The diameter in the cross-section of the second tube portion 4112 may be larger than the diameter in the cross-section of the first tube portion 4111. The connection tube part 4113 connects the first tube part 4111 and the second tube part 4112. Since there is a difference in diameter of both tube parts, the connection tube part 4113 may be formed in a conical shape. The connection tube part 4113 may have a shape in which a diameter in a cross section increases toward a lower portion D.

As the flame tube part 41 has each tube part and has a shape in which the diameter in the cross section increases as it goes downward (D), it is laterally than the width of the flame of the straight tube 532 type tube having the same diameter. A larger flame can be formed.

In addition, the flame tube part 41 is formed in a tapered shape in the above-described form, so that even if the height of the combustion chamber 22 is shortened, a flame sufficient to produce combustion gas for heating the heating water and to generate radiant heat. Can be formed.

The flame tube portion 41 is formed in a tapered shape, so that the flame is not formed to be long, but spreads, so that the flame does not touch the lower cover 29. Since the flame does not touch the lower cover 29, the generation of noise and soot during ignition and combustion can be reduced.

The flame tube may be divided into an upper flame tube 412 and a lower flame tube 411. The upper flame tube 412 may have at its upper end a tube flange 4121 protruding radially outward from the cylindrical body so as to be coupled to and fixed to the combustion chamber cover 28. The tube flange 4121 is seated on the combustion chamber cover 28 and may be fastened to the combustion chamber turbine 28 using a fastener.

The recirculation hole 413 may be formed in the upper flame tube 412, and the lower flame tube 411 may be coupled to the upper flame tube 412 at a lower side than the recirculation hole 413. The upper flame tube 412 may have a shape protruding downward (D) from the combustion chamber cover 28. The lower flame tube 411 may be coupled to the lower region of the upper flame tube 412. A method of assembling the upper flame tube 412 and the lower flame tube 411 will be described with further reference to FIGS. 6 and 7.

Referring to the drawings, a tube hole 415 may be formed in the upper flame tube 412 and a tube protrusion 414 may be formed in the lower flame tube 411. As the tube protrusion 414 is inserted into the tube hole 415 and manipulated, the upper flame tube 412 and the lower flame tube 411 are coupled to each other, and a position relative to each other may be fixed.

The tube protrusion 414 may be formed on the first tube portion 4111. Specifically, the tube protrusion 414 may be formed to protrude outward from a position adjacent to the upper end of the lower flame tube 411. The tube protrusion 414 may be formed by folding a portion extending downward (D) from the upper end of the lower flame tube 411 to the outside, but the formation method is not limited thereto.

The lower hole 4140 may be a hole formed upward from the tube protrusion 414 to an upper end of the first tube portion 4111. The lower hole 4140 may be formed to penetrate the first tube part 4111 in a radial direction.

The size of the lower hole 4140 may be larger than the size of the tube protrusion 414. Specifically, two holes having a predetermined size are formed in a perforated manner at a predetermined interval along the circumferential direction of the first tube portion 4111, and then the remaining protruding portion in the center is folded to face outward in the radial direction. The lower hole 4140 and the tube protrusion 414 as described above may be formed, but the method of forming the lower hole 4140 is not limited thereto.

The tube hole 415 may be formed by passing through the upper flame tube 412 in the radial direction. Specifically, the tube hole 415 may include a vertical hole portion 4151 extending upward from the lower end of the upper flame tube 412. Let the length of the vertical hole portion 4151 in the vertical direction be a first distance.

A horizontal hole portion 4152 extending in one direction along the circumference of the upper flame tube 412 from the upper end of the vertical hole portion 4151 may be formed. Since the upper flame tube 412 may be formed in a cylindrical shape, the horizontal hole portion 4152 may be formed along the circumferential direction of the upper flame tube 412.

The tube hole 415 may include a locking hole portion 4153 formed by extending downward (D) from the end of the horizontal hole portion 4152. The locking hole part 4153 may have a length in a vertical direction equal to a second distance smaller than the first distance.

The tube hole 415 and the tube protrusion 414 may be configured in plural, and may be disposed spaced apart by a predetermined interval along the periphery of the flame tube, respectively. The number of the tube holes 415 and the tube protrusions 414 correspond to each other, so that one tube protrusion 414 may be inserted into one tube hole 415.

After aligning the positions of the tube protrusion 414 and the tube hole 415 with each other, the lower flame tube 411 is moved upward, so that the tube protrusion 414 may be inserted into the vertical hole portion 4151. Thereafter, by rotating the lower flame tube 411 in the vertical direction in the axial direction, the tube protrusion 414 may move along the horizontal hole part 4152. Thereafter, by moving the lower flame tube 411 downward (D), the tube protrusion 414 may be caught in the locking hole portion 4153.

As the flame tubes 411 and 412 are assembled in this way, the flame tubes 411 and 412 may not be easily separated by vibration or shaking. In addition, the lower flame tube 411 and the upper flame tube 412 only contact each other, but may not be fused or integrated by welding or the like, or strongly coupled through separate fasteners such as bolting. Therefore, it may not be deformed by heat generated during welding, and a portion fastened by a fastener may be prevented from being corroded or damaged when high temperature occurs. In addition, the amount of heat transferred from the high-temperature lower flame tube 411 to the upper flame tube 412 may be reduced.

In addition, by configuring the upper flame tube 412 and the lower flame tube 411 as separate items, the lower flame tube 411 is composed of a material capable of maintaining its structure and physical characteristics even at high temperatures, and the upper flame tube 412 is It can also be constructed using materials that are relatively vulnerable to high temperatures. Since the material that can withstand high temperatures is very expensive, it is possible to construct a boiler more economically than when forming an integral flame tube.

Combustion guide(27)

The combustion guide 27 is a component that is disposed in the internal space 220 of the combustion chamber 22 to reverse the flow direction of the combustion gas. A combustion reaction occurs by the burner 42, and the combustion gas generated therefrom is directed downward (D). The combustion gas directed downward (D) encounters the combustion guide 27 and the flow direction thereof may be reversed upward. Therefore, the combustion guide 27 may be located under the burner 42 and the flame tube part 41.

The combustion guide 27 may include a blocking plate 271, a guide wall 272 and a guide leg 273. The blocking plate 271 is disposed to be spaced apart from the inner side surface 221 of the combustion chamber 22 and may be formed in a plate shape. Since the internal space 220 of the combustion chamber 22 is formed in a cylindrical shape, the blocking plate 271 may be formed in a disk shape. While the combustion gas moves downward (D), it collides with and reflects the blocking plate 271 and moves upward. In addition, the blocking plate 271 is located between the inner bottom surface 222 of the combustion chamber 22 and the burner 42, so that the flame does not directly contact the inner bottom surface 222 of the combustion chamber 22, but the blocking plate 271 Reach. Since the flame does not directly contact the inner bottom surface 222 of the combustion chamber 22, it is possible to reduce the boiling noise generated by the rapid boiling of heating water located under the inner bottom surface 222.

The guide wall 272 extends upward from the blocking plate 271 and may be formed along an edge of the blocking plate 271. Therefore, the guide wall 272 may be formed in an annular shape. Since the guide wall 272 surrounds an area located above the blocking plate 271, the combustion gas reflected from the blocking plate 271 can move upward along the guide wall 272.

Part of the combustion gas that has moved upward by the guide wall 272 circulates inside the flame tube through the recirculation hole 413, and the rest collides with the combustion chamber cover 28 or the nozzle flange, and the flow direction is again downward ( D). Accordingly, the remaining combustion gas moves downward (D) through the space formed between the guide wall 272 and the inner side surface 221 of the combustion chamber 22.

The guide leg 273 is a component that extends downward (D) from the blocking plate 271. The guide leg 273 extends downward (D) from the blocking plate 271, and its lower end may contact the inner bottom surface 222 of the combustion chamber 22. Therefore, the guide leg 273 supports the blocking plate 271 on the inner bottom surface 222 of the combustion chamber 22. The blocking plate 271 and the inner bottom 222 of the combustion chamber 22 are separated from each other by the guide leg 273, and flow through the space between the blocking plate 271 and the inner side 221 of the combustion chamber 22 The combustion gas to be moved downward (D) through the pipe 23 disposed through the inner bottom 222 of the combustion chamber 22.

Therefore, the direction of the combustion gas is reversed by the combustion guide 27 to have an inverted combustion structure, so that the combustion gas can circulate inside the flame tube, and the flame does not directly touch the inner bottom surface 222 of the combustion chamber 22. It can reduce the boiling noise of heating water.

By having an inverted combustion structure, compared with the time during which the combustion gas can stay in the combustion chamber 22 in the case of not having an inverted combustion structure, the combustion gas stays in the combustion chamber 22 for a longer time, and the combustion chamber 22 ), the heat is transferred to the upper side, and the thermal efficiency may increase. In addition, if the combustion guide 27 is not provided, foreign substances such as soot generated during the combustion process may flow into the pipe 23 and the like. However, in an embodiment of the present invention having the combustion guide 27, such soot and foreign substances are accumulated in the combustion guide 27, so that the oil boiler 1 can be used more cleanly, and the heat exchange rate can be increased.

Insulation material (not shown) is disposed in the combustion guide 27 to have heat insulation and sound insulation effects. Such an insulating material may be Cerakwool, but the type is not limited thereto.

Blower(44)

8 is a cross-sectional view of a portion of the oil boiler 1 in accordance with an embodiment of the present invention for sending air to the burner 42. 9 is an exploded perspective view of the burner assembly of the oil boiler 1 according to an embodiment of the present invention. 10 is an exploded perspective view of the damper part 444 of the oil boiler 1 according to an embodiment of the present invention. 11 is a view showing a region in which the pressure relief hole 5121 of the oil boiler 1 is located according to an embodiment of the present invention.

Referring further to FIGS. 8 and 11, the oil boiler 1 according to an embodiment of the present invention may include a burner assembly. The burner assembly includes a burner 42, a blower 44, and a fuel pump part 45, and a flame tube part 41, a combustion chamber cover 48, a burner housing 46, an air supply pipe 51, and an ignition It is an assembly that may include a transformer 48, a flame acquisition unit 43, and the like.

Burner assembly, in a state in which components such as flame tube part 41 are assembled to the combustion chamber cover 48 using fasteners, etc., by inserting the burner 42 into a hole formed in the center of the combustion chamber cover 48 It can be provided in a seating manner. As the burner assembly is formed in this manner, the coupling relationship between the components of the oil boiler 1 can be easily disassembled to perform cleaning.

Blower(44)

A blower 44 may be further included. The blower 44 is a device for pressurizing air supplied from the outside to the air nozzle 422. The blower 44 includes an impeller 441 for compressing air and transmitting it to the air nozzle 422, a blower driving motor 443 for transmitting driving force for rotating the impeller 441 to the impeller 441, and an impeller. A case 442 may be included.

The blower 44 may communicate with the air nozzle 422 through the blower pipe 464. The blower pipe 464 connects the blower 44 and the burner 42. A damper part 444 may be disposed in the blower pipe 464. The damper part 444 includes a flap 4442 that can move between a first position for opening the blower pipe 464 and a second position for closing the blower pipe 464.

The damper part 444 is formed in an annular shape and further includes a damper annular body 441 having a damper opening 4440 in the center, and the flap 4442 is rotatably coupled to one side of the damper annular body 441. Can have. The damper annular body 441 is disposed in an oblique direction to the direction in which the blower pipe 464 extends, and the lower side is further protruded to one side with the flap 4442, so that the flap 4442 can be seated when rotated by its own weight. You can have a posture. As the flap 4442 rotates, it is disposed at a second position covering the damper opening 4440 to close the blower pipe 464. As the flap 4442 rotates, it is disposed at a first position spaced apart from the damper opening 4440 to open the blower pipe 464.

When the blower 44 is operated, the flap 4442 may be pressurized by an air flow generated by the blower 44 and may be positioned at the first position. When the blower 44 is not operated, the flap 4442 may be positioned in the second position by its own weight. Therefore, after the operation of the boiler is stopped, the oil vapor remaining in the fuel nozzle 421 flows backward and is located in the supply pipe 51 and the flue 53, or is discharged to the outside to generate an unpleasant odor. ) Can be prevented by closing the blower pipe 464.

When the damper annular body 441 is disposed in the blower pipe 464, the O-ring 4443 is fitted along its periphery, so that airtightness can be maintained at the boundary between the damper annular body 441 and the inner surface of the air pipe 464. The O-ring 4443 may be formed of a flexible material.

The impeller 441 compresses and sends air introduced by rotation. Therefore, the impeller 441 may have a special shape, and a plurality of spiral blades may be disposed spaced apart from each other on the outer surface of the body formed in a gentle cone or truncated shape, but the shape is not limited thereto.

The inlet 4411 of the impeller is an area corresponding to the vertex of the cone, and the air introduced through it is formed in the radial direction of the impeller 441 through the space between the blade and the blade according to the rotation of the impeller 441 ( 441) and can be discharged in a compressed state.

The impeller 441 may be disposed in the receiving space 440 inside the impeller case 442 so as to face downward (D). However, the shape and arrangement direction of the impeller 441 are not limited thereto.

The blower drive motor 443 may be powered and electrically connected to the processor 152 to be controlled. The blower drive motor 443 is connected to the impeller 441 and transmits a driving force so that the impeller 441 can rotate. The blower driving motor 443 may not be a motor capable of rotating the impeller 441 at only one speed, but may be a motor capable of rotating the impeller 441 at various speeds. Specifically, the blower driving motor 443 may be a BLDC (BrushLess DC) motor, but the type is not limited thereto. As the blower drive motor 443 rotates the impeller 441 faster, the flow rate transmitted by the blower 44 to the air nozzle 422 may increase. A specific example in which the processor 152 controls the blower drive motor 443 will be described in detail in the description of the air supply pipe 51.

The impeller case 442 is a component having an opening communicating with the accommodation space 440 and the outlet 5120 of the supply pipe. The impeller case 442 is formed to surround the impeller 441, so that air is not leaked and can be well pumped by the impeller 441.

The impeller case 442 has an opening of the case 10 communicating with the outlet 5120 of the supply pipe and the receiving space 440 therein. The opening of the case 10 may be formed in a region adjacent to the inlet 4411 of the impeller. The supply pipe 51 includes a pipe portion having an inlet and an outlet at both ends, and a flange portion 512 that extends outwardly from an end where an outlet is provided among both ends of the pipe portion to cover the opening of the case 10 Is formed. Accordingly, the flange portion 512 may be coupled to an area around the opening of the case 10 among the areas on the impeller case 442.

The supply pipe 51 may have a pressure relief hole 5121. The pressure relief hole 5121 is formed through the flange portion 512, communicates the inside and the outside of the impeller case 442, and may be provided along the edge of the outlet 5120 of the supply pipe, which is the outlet of the pipe portion. . The pressure relief hole 5121 may be formed in plural, and may be disposed to be spaced apart from each other along the edge of the outlet of the pipe part.

The pressure relief hole 5121 is disposed to block the reverse flow of combustion gas and air from the combustion chamber 22 to the supply pipe 51 due to an explosion occurring in a situation such as when the fuel is ignited. The pressure relief hole 5121 is formed, and even if combustion gas or air flows back through the impeller 441 and reaches the opening of the case 10, it is discharged to the outside of the impeller case 442 through the pressure relief hole 5121 Can be. Accordingly, the flow rate of air or combustion gas flowing back to the supply pipe 51 can be significantly reduced.

The pressure relief hole 5121 may be formed in a funnel shape whose diameter becomes narrower from the inside to the outside of the impeller case 442. Therefore, when air is sucked into the accommodation space 440 from the outside of the impeller case 442, the speed is rapidly reduced by its shape, thereby preventing noise from occurring.

Burner fixing plate (424) and burner housing (46)

The burner fixing plate 424 may be formed in a disk shape, and there may be a portion bent downward (D) from the edge portion of the disk. Such a portion may contact the inner surface of the upper flame tube 412 to maintain airtightness, and the upper flame tube 412 and the burner fixing plate 424 may be well fixed.

Specifically, the burner fixing plate 424 may include a disk-shaped fixing plate portion 4242 and a circumferential portion 4244 extending downward from the circumference of the fixing plate portion and contacting the inner surface of the flame tube. At this time, the circumferential portion 4244 is in contact with the inner surface of the upper flame tube 412 among the flame tube portions 41, and the lower end of the circumferential portion 4244 is disposed to be observable from the outside through the recirculation hole 413 Can be. That is, the lower end of the circumferential portion 4244 may be positioned above the middle position of the recirculation hole 413 based on the vertical direction. By minimizing the area in which the peripheral portion 4244 is exposed through the recirculation hole 413, heat transfer to the flame acquisition portion 43, which will be described later, can be reduced.

By adjusting the height of the circumferential portion 4244 blocking a portion of the recirculation hole 413, the width of the recirculation hole 413 may be adjusted. Accordingly, the height of the lower end of the circumferential portion 4244 may be determined so that the recirculation hole 413 has the largest size among the sizes of the recirculation hole 413 that can be used in the oil boiler 1 of a corresponding capacity.

The lower end of the circumferential portion 4244 may be located above the recirculation hole 413. Accordingly, there may not be a region where the circumferential portion 4244 and the recirculation hole 413 overlap.

The burner housing 46 is a component forming a burner space (460 of FIG. 8) surrounding a part of the fuel nozzle 421 and a part of the spark plug 423 together with the burner fixing plate 424. The blower 44 blows air into the burner space (460 in FIG. 8), and the burner space (460 in FIG. 8) communicates with the air nozzle 422, so that the air passes through the air nozzle 422 to the combustion chamber 22. To be provided with.

The burner housing 46 may be seated and fixed on the upper side of the combustion chamber cover 28. However, the entire lower surface of the burner housing 46 facing the combustion chamber cover 28 does not contact the upper surface of the combustion chamber cover 28, and a part of the lower surface of the burner housing 46 is a part of the upper surface of the combustion chamber cover 28. In contact with each other, a spaced space may be formed between the burner housing 46 and the combustion chamber cover 28.

Specifically, an annular cover contact portion 462 is formed at the lower end of the burner housing 46, and the cover contact portion 462 may be coupled to the combustion chamber cover 28 using a contact and fastener. A portion of the burner housing 46 positioned radially inside the cover contact portion 462 may be spaced upward from the combustion chamber cover 28 to form a burner space 460.

With this structure, when the burner housing 46 and the entire combustion chamber cover 28 are in contact, less heat than the amount of heat transferred from the high-temperature combustion chamber 22 to the combustion chamber cover 28 can be transferred to the burner housing 46. have. The degree to which the burner housing 46 is heated is reduced, so that the degree to which the flame acquisition unit 43 to be described later is heated may be reduced.

In order to prevent leakage of combustion gas or air between the burner housing 46 and the combustion chamber cover 28, an annular cover packing 461 may be disposed. The cover packing 461 is disposed between the burner housing 46 and the combustion chamber cover 28 to maintain airtightness of the burner space 460.

In addition, a portion of the burner housing 46 located outside the cover contact portion 462 in the radial direction may include an outer portion of the transformer fixing portion 465 and an outer portion of the blower tube 464. The oil boiler 1 according to an embodiment of the present invention may include an ignition transformer 48 that receives a normal power supply, boosts it, and provides it to the spark plug 423 to cause a spark. The fixing part 465 is provided for fixing the ignition transformer 48. The blower pipe 464 is connected to the blower 44 and serves as a passage for pumping air to the burner space 460. An outer portion of the transformer fixing portion 465 and an outer portion of the blower pipe 464 may be spaced upward from the combustion chamber cover 28. This is to reduce the contact area with the combustion chamber cover 28 heated by the combustion reaction, and to reduce the amount of heat transferred to the flame acquisition unit 43 to be described later.

Fuel pump part (45)

12 is an exploded perspective view of the fuel pump unit 45 of the oil boiler 1 according to an embodiment of the present invention.

With further reference to FIG. 12, a fuel pump unit 45 according to an embodiment of the present invention will be described. The fuel pump unit 45 is a component for supplying fuel to the fuel nozzle 421. The fuel pump unit 45 may include a fuel pump 451 and a fuel pump driving motor 452, and further includes a coupling unit 453, a fuel pump unit case 455, and a heat dissipation hole 4551. can do.

The fuel pump 451 is a component including gears for compressing fuel and transmitting it to the fuel nozzle 421. Accordingly, the fuel pump 451 may be a gear pump in which gears are meshed to compress fluid therebetween to inject. The fuel pump 451 is connected to a fuel pipe 4561 through which fuel flows from the fuel storage unit (not shown) to receive fuel, and is connected to the recovery pipe 4562 to store the remaining fuel after injection. It can be returned to the part 3212.

The fuel pump drive motor 452 is a component that transmits a driving force to the fuel pump 451 to rotate gears. The fuel pump driving motor 452 may be provided separately from the blower driving motor 443. Therefore, compared to the case where the blower 44 and the fuel pump 451 are placed on the same shaft of the same motor to receive driving force, the length of the member used as the shaft is shortened, thereby reducing the amount of eccentricity, reducing the driving torque, and power consumption. Can be reduced.

The fuel pump driving motor 452 is capable of supplying the fuel to the fuel nozzle 421 by compressing the fuel of at least one of the first fuel flow rate and the second fuel flow rate greater than the first fuel flow rate. It can be controlled by the processor 152. Therefore, the fuel pump 451 can provide at least two stages of fuel flow rate, but in addition to the described first fuel flow rate and the second fuel flow rate, fuel of another fuel flow rate not equal to the first fuel flow rate and the second fuel flow rate. May be supplied to the fuel nozzle 421.

The fuel pump 451 includes a shaft member 4511 of a fuel pump provided to rotate gears, and a drive shaft 4251 of a fuel pump driving motor provided to transmit a driving force of the fuel pump driving motor 452. ) Can be connected.

The coupling part 453 may be an Oldham coupling. Therefore, even if the shaft member 4511 of the fuel pump and the drive shaft 4521 of the fuel pump driving motor are in an eccentric state that are not coaxial with each other, the driving force of the fuel pump driving motor 452 is transmitted to the gear of the fuel pump 451 Can be. In addition, even in an eccentric state, it is possible to drive the fuel pump 451 with a small torque.

The fuel pump unit 45 is a fuel pump unit case 455 having an interior space for housing the shaft member 4511 of the fuel pump, the coupling unit 453, and the drive shaft 4251 of the fuel pump driving motor. Can have In the fuel pump part case 455, a heat dissipation hole 4551 may be formed. The heat dissipation hole 4551 is an opening that penetrates the fuel pump part case 455 and communicates the interior space and the outside of the fuel pump part case 455. Since the heat dissipation hole 4451 is open, heat generated during coupling may be radiated. In addition, the heat dissipation hole 4551 is formed in a size that allows the passage of the coupling part 453, and the coupling part 453 is connected to the shaft member 4511 of the fuel pump and the drive shaft of the fuel pump drive motor through the heat dissipation hole 4551. I can assemble it in (4521).

When the mixed material is ignited, the processor 152 may control the fuel pump unit 45 to supply fuel to the fuel nozzle 421 at a first fuel flow rate. As the fuel of the first fuel flow rate, which is a relatively lower flow rate than the second fuel flow rate, is provided to the fuel nozzle 421, the fuel is consistently provided at the same flow rate as the second fuel flow rate and is less than the ignition noise generated when ignition is performed. A loud ignition noise may occur.

The oil boiler 1 according to an embodiment of the present invention may further include a temperature acquisition unit 214 that acquires the temperature of the combustion chamber 22. The temperature acquisition unit 214 is attached to the outside of the surface adjacent to the combustion chamber 22 of the outer cylinder 21, so that the temperature of the combustion chamber 22 can be obtained indirectly, and may be formed as a thermocouple, but its type and location It is not limited thereto.

An oil boiler 1 can be considered in which the fuel pump unit 45 cannot adjust the fuel flow rate, which is the flow rate of the fuel delivered to the fuel nozzle 421. In this case, when it is confirmed that the combustion chamber 22 is overheated, the oil boiler 1 stops the fuel supply so that the combustion chamber 22 can cool to stop the combustion reaction. When the combustion chamber 22 is too cold and needs to be heated again by a combustion reaction, the fuel pump unit 45 restarts supply of fuel to the fuel nozzle 421 to ignite and generate a flame. As such an operation is repeated, ignition noise may be continuously generated, and a reverse flow of combustion gas or air may occur due to an explosion at the time of ignition.

The processor 152 according to an embodiment of the present invention may be electrically connected to the temperature acquisition unit 214. According to the temperature of the combustion chamber 22, the processor appropriately controls the fuel pump unit 45 to solve the above-described problem.

Specifically, when the fuel pump unit 45 supplies fuel to the fuel nozzle 421 at the second fuel flow rate, the combustion chamber 22 is overheated and the temperature of the combustion chamber 22 obtained by the temperature acquisition unit 214 is predetermined. There may be cases where the upper limit of is exceeded. In this case, the processor 152 may control the fuel pump unit 45 to supply fuel to the fuel nozzle 421 at the first fuel flow rate. Accordingly, the combustion chamber 22 can be prevented from being overheated, the amount of nitrogen oxide generated due to high temperature can be reduced, and the combustion reaction can not be stopped.

When the fuel pump unit 45 supplies fuel to the fuel nozzle 421 at the first fuel flow rate, the temperature of the combustion chamber 22 obtained by the temperature acquisition unit 214 by transplanting the combustion chamber 22 does not reach a predetermined lower limit. There may be cases where you cannot. In this case, the processor 152 may control the fuel pump unit 45 to supply fuel to the fuel nozzle 421 at the second fuel flow rate. Accordingly, it is possible to prevent a situation in which the heating water cannot be heated smoothly due to the cooling of the combustion chamber 22, and ignition noise and reverse flow occurring in a situation in which the combustion reaction is stopped and then resumed can be prevented.

Air supply part

The supply pipe part includes an air supply pipe 51 and a corrugated pipe 52. The inlet of the corrugated pipe 52 is connected to the air supply adapter 3333 of the flue connection adapter 333 to receive air introduced from the flue 53 to the flue connection adapter 333. The outlet of the corrugated pipe 52 communicates with the inlet 5110 of the supply pipe to provide air to the supply pipe 51. The inlet portion 511 of the supply pipe forming the inlet 5110 of the supply pipe is inserted into the outlet of the corrugated pipe 52, so that the corrugated pipe 52 and the supply pipe 51 may be coupled to each other. The outlet 5120 of the supply pipe communicates with the opening of the case 10 of the impeller case 442 to provide air to the blower 44.

That is, the supply pipe part is formed by connecting the supply pipe 51 and the corrugated pipe 52, the inlet of the supply pipe part becomes the inlet of the corrugated pipe 52, and the outlet of the supply pipe part becomes the outlet 5120 of the supply pipe. Having such a structure, the air supply pipe part guides external air to the blower 44 and, as a result, guides the air to the air nozzle 422.

The corrugated pipe 52 is a tube having an outer surface folded in an accordion shape, and the overall shape and length are variable. Therefore, it is possible to freely determine the location of the outlet and the inlet, and it is easy to deform. Even if the position of the supply pipe 51 or the position of the air supply adapter 3333 of the flue connection adapter 333 changes, the corrugated pipe 52 It is possible to easily connect the flue connection adapter 333 and the air supply pipe 51. A flexible material may be selected as the material of the corrugated pipe 52.

The total length of the supply pipe 51 may be longer than the length of a straight line connecting the inlet 5110 of the supply pipe and the outlet 5120 of the supply pipe. That is, the supply pipe 51 is not formed in a cylindrical pipe shape in which the inlet and the outlet are connected straight, but has a bent or bent portion.

When the mixed material is ignited, the pressure of the combustion gas and air flowing back from the inner space 220 of the combustion chamber 22 to the blower 44 may be generated and acted by the explosion of the mixed material. However, the pressure of air acting from the blower 44 toward the inner space 220 by the blower 44 also exists. Based on the magnitudes of these two pressures, at least one of the total length of the air supply pipe 51 and the inner diameter of the air supply pipe 51 may be determined.

Specifically, the total length of the supply pipe 51 may be formed so that the counter-current combustion gas or air cannot pass through the supply pipe 51 based on the magnitude of the two pressures described above. When the length of the supply pipe 51 is increased, the amount of resistance applied to the backflowing fluid may increase.

In addition, the inner diameter of the supply pipe 51 may be formed so that the combustion gas or air flowing backward cannot pass through the supply pipe 51 based on the magnitudes of the two pressures described above. When the inner diameter of the air supply pipe 51 is decreased, the amount of resistance applied to the backflowing fluid may increase.

For example, the pressure generated in the inner space 220 during ignition may be about 150 mmH ₂ O. When the blower 44 is ignited, the wind pressure may be about 100 mmH ₂ O. Therefore, the inner diameter and total length of the supply pipe 51 may not cause air flow even when the differential pressure between the inlet 5110 and the outlet 5120 of the supply pipe 51 is equal to the difference between the two pressures, 50mmH ₂ O. It may be formed so that the supply pipe 51 has a resistance of a predetermined size.

The air supply pipe 51 connects a plurality of straight portions 514 extending straight and two adjacent straight portions 514 so that the air supply pipe 51 has a bent or bent portion, and two straight portions ( It may include a connecting portion 513 arranged vertically to each other. By having at least one connection part 513, the air supply pipe 51 may have a bent shape as shown. In addition, in the internal space 220 in the limited case 10, the air supply pipe 51 may occupy a minimum space while having a long length. The straight portion 514 and the connection portion 513 may form the above-described pipe portion.

13 is a cross-sectional view of the supply pipe 51 of the oil boiler 1 according to an embodiment of the present invention. With further reference to FIG. 13, the internal structure of the air supply pipe 51 and control of the blower 44 using the same will be described. Differential pressure measuring ports 5161 and 5162 may be disposed at two points of the supply pipe 51, respectively. Among the differential pressure measuring instruments 5161 and 5162, the differential pressure measuring instrument located upstream along the flow direction of air when the blower 44 is operated is the first differential pressure measuring instrument 5161, and the differential pressure measuring instrument located downstream is the second differential pressure measuring instrument ( 5162). In order to obtain the differential pressure between the two differential pressure measuring instruments 5161 and 5162, the differential pressure acquisition unit 47 is connected to the two differential pressure measuring instruments 5161 and 5162. The differential pressure acquisition unit 47 may be a device that acquires a differential pressure between two points using a diaphragm, but the method is not limited thereto.

An orifice plate 517 is disposed between the two points. The orifice plate 517 is a structure in which a pressure drop of flowing air occurs so that the pressure of the second differential pressure measuring port 5162 is smaller than the pressure of the first differential pressure measuring port 5161 so that a differential pressure between two points is generated. Specifically, the orifice plate 517 is formed as a plate having a hole in the center whose cross-sectional area decreases as it goes along the flow direction of air, so that a pressure drop occurs when air flows.

An adapter part 515 may be disposed on the upstream side of the orifice plate 517 based on the flow direction of air. The adapter portion 515 includes an inlet 5110 of the supply pipe, and may have an inner diameter larger than the inner diameter of the pipe portion to be disposed on the downstream side of the orifice plate 517 at a position adjacent to the orifice plate 517. However, in other positions, depending on the capacity of the oil boiler 1, it may have an inner diameter smaller than the inner diameter described above, or may have a larger inner diameter. The adapter part 515 may be detachably coupled to a pipe part located downstream of the orifice plate 517 based on the orifice plate 517.

The differential pressure acquisition unit 47 is electrically connected to the processor 152 and transmits the obtained differential pressure to the processor 152. The processor 152 controls the blower 44 based on the obtained differential pressure. The impeller 441 of the blower 44 may rotate at any one of a plurality of different speeds.

At the reference differential pressure, which is a predetermined appropriate differential pressure, the boiler is normally operated, and air is smoothly supplied to the burner 42 to cause a combustion reaction. However, if the condensed water is not discharged smoothly, or resistance is generated in the flow of the combustion gas due to soot deposited somewhere in the passage of the combustion gas, the blower 44 is provided to the burner 42 even though the blower 44 operates in the same manner. The resulting flow rate decreases, and the pressure of the second differential pressure measuring device 5162 increases. In this case, since the pressure in the first differential pressure measuring instrument 5161 will be the same, the differential pressure is lower than the reference differential pressure.

Consider an oil boiler 1 in which the blower 44 rotates only at the same speed. In such an oil boiler 1, since the blower 44 is not controlled according to the change in the differential pressure, there is no way to cope with even when the flow of the combustion gas is disturbed. Accordingly, the air flow rate of the air provided to the burner 42 decreases gradually, and eventually the flame is turned off, so that the operation of the boiler may be stopped.

However, the processor 152 of the oil boiler 1 according to an embodiment of the present invention controls the blower 44 to maintain a reference differential pressure. Accordingly, when the obtained differential pressure is lower than the reference differential pressure, the processor 152 controls the blower 44 to increase the speed at which the impeller 441 rotates. Accordingly, the reduced differential pressure may again reach the reference differential pressure, and the reduced air flow rate increases again, thereby maintaining a state in which a uniform and smooth combustion reaction can occur in the burner 42.

Resistance in the path through which the combustion gas flows disappears for some reason, the air flow rate increases even though the impeller 441 of the blower 44 is rotating at the same speed, and the obtained differential pressure may exceed the reference differential pressure. In this case, the processor 152 controls the blower 44 to decrease the speed at which the impeller 441 rotates. Accordingly, the increased differential pressure may again reach the reference differential pressure, and the increased air flow rate decreases again, thereby maintaining a state in which a uniform and smooth combustion reaction can occur in the burner 42.

Trap part (32)

14 is a cross-sectional view of the trap unit 32 of the oil boiler 1 according to an embodiment of the present invention. Referring to FIG. 14, a trap unit 32 of an oil boiler 1 according to an embodiment of the present invention will be described.

The trap unit 32 is a component through which condensed water discharged through the condensed water pipe 341 connected to the separating unit 312 included in the condensate receiving unit 31 passes. By passing through the trap unit 32, the condensed water can be discharged to the outside, but the combustion gas cannot be discharged like the condensed water, and can only be discharged through the duct 33 and the flue 53.

The trap unit 32 may include a buoyancy trap 321 and a U-shaped trap 322. The buoyancy body trap 321 may have a storage unit 3212 having a space for storing water and a buoyancy body 3211 disposed inside the storage unit 3212. The condensed water inlet 320 connected to the condensed water pipe 341 is communicated to the upper side of the storage unit 3212, so that the condensed water can be delivered to the storage unit 3212.

The buoyancy body 3211 floats or sinks by water stored in the buoyancy body trap 321. The stored water here may be condensed water, or may be separate water filled for initial boiler operation. The lower surface of the storage unit 3212 is penetrated to form an intermediate outlet 3213, and a seating portion 3214 is formed along the circumference of the intermediate outlet 3213. The buoyant body 3211 may be seated or separated from the seating portion 3214. When the buoyancy body 3211 is floating by the stored water, the buoyancy body 3211 is separated from the seating portion 3214 to open the intermediate outlet 3213, and the stored water may be discharged. When the stored water is discharged and the buoyancy body 3211 sinks, the buoyancy body 3211 may be seated on the seating portion 3214 to close the intermediate outlet 3213. In this way, the condensed water is discharged through the intermediate outlet 3213, but the buoyancy body trap 321 may be operated so that the combustion gas is not discharged.

The U-shaped trap 322 is a trap including a first outlet space 3221 and a second outlet space 3222. The U-shaped trap 322 has a structure in which water discharged from the buoyant trap 321 is stored and acts as a trap through which combustion gas cannot escape. The first outflow space 3221 is a space disposed below the intermediate outlet 3213 of the buoyancy trap 321 so that water discharged downward from the buoyancy trap 321 is stored. The second outlet space 3222 is a space extending upward from the first outlet space 3221, and when the volume of water stored in the first outlet space 3221 becomes larger than the volume of the first outlet space 3221, the second Water starts to fill up in the outflow space 3222 as well. The second outlet space 3222 extends upward from the first outlet space 3221 and surrounds the storage unit 3212 to form a U-shaped trap together with the first outlet space 3221.

Some areas of the trap inner wall 3231 defining the second outlet space 3222 are lower in height than other areas and have a condensate passage 3223 like an opening. When water is filled in the second outlet space 3222 and the water level reaches the height of the condensate passage 3223, the water escapes to the outlet container 323 through the condensate passage 3223.

The outflow container 323 is a container provided so that water discharged from the second outflow space 3222 can be stored and then discharged to the outside. An external discharge port 3232 connected to the final discharge pipe 340 is formed in the outlet container 323, and the stored water is discharged to the outside of the boiler through the final discharge pipe 340 connected to the outside of the case 10. That is, the condensed water supplied from the condensate receiver 31 is delivered to the outlet container 323 through each trap, and is discharged to the outside through the external outlet 3232 and the final discharge pipe 340. In the discharge space 3230, which is an internal space defined by the discharge container 323, a material for applying appropriate treatment to the acidic condensate may be disposed.

In the outlet container 323, a drain valve 343 or a safety valve 342 is an opening connected through a drain line (3431 in FIG. 3) and a safety line (3421 in FIG. 3), respectively, a drain opening 3233 and a safety opening. (3234) can be formed. The drain valve 343 is formed to be opened and closed to discharge the heating water accommodated in the hollow 210 in order to discharge the oil boiler 1 in order to move or perform work such as maintenance, cleaning, etc., and the hollow 210 It is a valve connected to the lower side of ). The safety valve 342 is a valve for solving the pressure of the heating water accommodated in the hollow 210 when the pressure of the heating water is excessively increased, and is formed to be opened and closed to discharge the heating water to reduce the pressure of the hollow 210 . The safety valve 342 may have a structure that is kept closed and automatically opens when the pressure of the heating water in the hollow 210 reaches a predetermined pressure.

These drain valves 343 and safety valves 342 are kept closed so that the heating water accommodated in the hollow 210 is not discharged from the hollow 210, and then automatically open when the user opens the valve or satisfies a predetermined condition. Is discharged to the outside of the oil boiler (1). In one embodiment of the present invention, as the drain valve 343 and the safety valve 342 are connected to the outlet vessel 323 of the condensate trap, the heating water is not discharged directly from each valve, but the outlet vessel 323 ) To be delivered. Therefore, as compared to the case that each valve and trap have a pipe leading to the outside of the case 10 to discharge water to the outside, according to an embodiment of the present invention, the final discharge to discharge water to the outside of the case 10 Since only one pipe 340 is present, heat insulation treatment and wall drilling work to be performed for each pipe are reduced, so that the installation of the oil boiler 1 can be improved.

Connection type of year (53)

15 is a cross-sectional view showing a coupling structure between the flue connection adapter 333 and the flue 53 of the oil boiler 1 according to an embodiment of the present invention.

With further reference to FIG. 15, the coupling structure of the flue connection adapter 333 and the flue 53 will be described. The flue 53 is a structure that finally guides the combustion gas to the outside of the case 10 of the oil boiler 1. Therefore, the flue 53 may be installed through the case 10. The flue 53 may be connected to the flue connection adapter 333 of the duct 33.

The flue 53 that can be coupled to the oil boiler 1 of the present invention is provided to surround the inner pipes 5311 and 5321 at the outer side of the inner pipes 5311 and 5321 and the inner pipes 5311 and 5321. It may have a double pipe structure having pipes 5312 and 5322. That is, the diameter of the outer pipes 5312 and 5322 is larger than the diameter of the inner pipes 5311 and 5321, and the inner pipes 5311 and 5321 and the outer pipes 5312 and 5322 can form a concentric circle in a horizontal plane. Accordingly, a first interspace may be provided between the outer pipes 5312 and 5321 and the inner pipes 5311 and 5321. Air may be guided through the first space.

In addition, the flue 53 may include a tubular straight pipe 532 formed to extend straight, and may include an elbow 531 in which the inlet and outlet directions are perpendicular to each other. Since the straight pipe 532 and the elbow 531 constitute the flue 53, it may have a double pipe structure as described above. That is, the inner pipe 5321 of the straight pipe 532 and the outer pipe 5322 of the straight pipe 532 may be disposed, and the inner pipe 5311 of the elbow 531 and the outer pipe of the elbow 531 connected thereto respectively (5312) can be placed.

The flue connection adapter 333 may have a double pipe structure including an inner adapter 3331 and an outer adapter 3332 to be connected to the flue 53 of a double pipe structure. The inner adapter 3331 may be connected to the inner pipes 5311 and 5321, and the outer adapter 3332 may be connected to the outer pipes 5312 and 5322. The diameter of the outer adapter is larger than that of the inner adapter, and the inner adapter and the outer adapter may form a concentric circle in a horizontal plane. The external adapter 3332 may be provided to surround the internal adapter 3331 from the outside of the internal adapter 3331. Accordingly, a second space may be formed between the external adapter 3332 and the internal adapter 3331.

A tubular internal adapter 3331 is formed to communicate the inner pipes 5311 and 5321 and the duct horizontal portion 332 to provide combustion gas to the inner pipes 5311 and 5321. In one embodiment of the present invention, the elbow 531 is expressed as being connected to the flue connection adapter 333, but the straight pipe 532 may be connected.

When the flue 53 is coupled to the flue connection adapter 333, a second space, which is a space between the inner side of the outer adapter 3332 and the outer side of the inner adapter 3331, and outer pipes 5312, 5322 The first space between the inner side of the inner side and the outer side of the inner pipes 5311 and 5321 may communicate with each other. Accordingly, external air transmitted from the outside of the case 10 may reach the second interspace through the first interspace. The external adapter 3332 may be connected to the air supply adapter 3333 connected to the air supply pipe part, and provide the reached external air to the air supply pipe part through the air supply adapter 3333. With this structure, it is not necessary to provide a structure for supplying air from the outside separately from the flue 53. In addition, even if the flue comes in from any direction and is connected to the flue connection adapter 333 as in FIGS. 16A to 16D, it is always possible to supply air to the supply pipe part at a certain position in the case 10, thereby providing air. It does not affect the flow rate.

The air supply adapter 3333 included in the flue connection adapter 333 is formed by protruding from the external adapter 3332 in a radially outward direction. The outer adapter 3332 and the inner adapter 3331 are opened upward to communicate with the elbow 531 of the flue 53 along the vertical direction, and open downward to communicate with the horizontal duct 332 in the vertical direction Therefore, the air supply adapter 3333 may be formed to extend in any one of the horizontal directions, and may communicate with the corrugated pipe 52 along the extended direction.

A space between the inner surface of the outer adapter 3332 and the outer surface of the inner adapter 3331 may communicate with the interior of the air supply adapter 3333. In the air supply adapter 3333, a corrugated pipe 52 connected to the inlet 511 of the air supply pipe may be coupled to be in communication.

The flue 53 may be inserted into the flue connection adapter 333 and be coupled to the flue connection adapter 333. The size of the outer diameter of the inner pipes 5311 and 5321 is formed to be less than the size of the inner diameter of the inner adapter 3331, so that the inner pipes 5311 and 5321 may be inserted into the inner adapter 3331. Likewise, the size of the outer diameter of the outer pipes 5312 and 5322 is formed to be less than the size of the inner diameter of the outer adapter 3332, so that the inner pipes 5311 and 5321 may be inserted into the inner adapter 3331.

The flue connection adapter 333 may further have a stopper 3334 inside. When the flue 53 is inserted into the flue connection adapter 333, if the flue 53 is inserted too deeply, the outer pipes 5312 and 5322 may block the inlet of the air supply adapter 3333 communicated with the external adapter 3322. Therefore, as the stopper 3334 protrudes radially inward from the inner surface of the inner adapter 3331, the inner pipes 5311 and 5321 are caught in the stopper 3334 while being inserted downward (D) and no longer fall downward ( As D), the state in which the year 53 cannot be inserted may be maintained. That is, when the flue 53 is inserted and coupled to the flue connection adapter 333, the stopper 3334 is formed in the external adapter 3322 by inhibiting the inner pipes 5311 and 5321 from moving downward from a predetermined point. The outer pipe (5312, 5322) blocks the opening to be blocked.

The height of the stopper 3334 is, when the inner pipes 5311 and 5321 contact the stopper 3334, the outer pipes 5312 and 5322 are located above the inlet of the air supply adapter 3333, so that the air supply adapter 3333 It can be a height that does not block. The stopper 3334 may be configured in plural and disposed to be spaced apart from each other along the inner surface of the inner adapter 3331. In a horizontal plane, the size of the outer diameter of the inner pipes 5311 and 5321 may be smaller than the size of the inner diameter of the inner adapter 3331 but greater than the distance from the center of the inner adapter 3331 to the stopper 3334.

16A to 16D are perspective views illustrating various forms in which the flue 53 is connected to the oil boiler 1 according to an embodiment of the present invention.

The outlet of the duct 33 may be disposed at a position spaced apart from the upper wall 11 of the case 10 by a safety interval or more. The safety interval is a predetermined interval larger than the outer diameter of the pipe constituting the straight pipe 532 and the elbow 531 of the flue 53. Accordingly, a straight pipe 532 or an elbow 531 may be disposed between the duct 33 and the upper wall 11 of the case 10.

In the upper wall 11 and the side walls 12 constituting the case 10, flue insertion openings 111, 1211, 1231, and 1241 may be formed. The flue insertion ports 111, 1211, 1231, and 1241 are openings formed so that the flue 53 can pass through. When the case 10 has four side walls 12, flue inserts 111, 1211, 1231, and 1241 may be formed on at least two of the upper wall 11 and the four side walls 12, respectively. In one embodiment of the present invention, it is expressed that flue inserts 111, 1211, 1231, and 1241 are formed in the upper wall 11, the first side wall 121, the third side wall 123, and the fourth side wall 124, respectively. However, the position where the flue inserts 111, 1211, 1231, and 1241 are formed is not limited thereto.

When the flue 53 is inserted through the flue inserts 1211, 1231, 1241 opened in the side wall 12, the flue 53 is an elbow 531 and an elbow 531 coupled with the flue connection adapter 333 It may include a straight pipe 532 directed to the flue insertion openings 111, 1211, 1231, and 1241 of the side wall 12 along the horizontal direction from. When the flue 53 is inserted through the flue insert 111 opened in the upper wall 11, the flue 53 includes a straight pipe 532, and the straight pipe 532 is directly coupled with the flue connection adapter 333 Can be.

16A shows a situation in which the flue 53a including the straight pipe 532a and the elbow 531a is inserted into the flue insertion hole 1231 formed in the third side wall 123, and the flue insertion hole formed in the first side wall 121 ( The situation in which the flue 53b including the straight pipe 532b and the elbow 531b is inserted into 1211 is shown in FIG. 16B. The straight pipe 532c and the elbow 531c are inserted into the flue insert 1241 formed in the fourth side wall 124. A situation in which a flue 53c including) is inserted is shown in FIG. 16C, and a situation in which a flue 53 including a straight pipe 532d is inserted into the flue insert 111 formed in the upper wall 11 is shown in FIG. 16D. . In each of the drawings, the remaining walls except for the second side wall 122 constituting the case 10 are shown in broken lines so that the connection state of the flue 52 and the flue connection adapter 333 can be more easily identified.

The elbow 531 connected to the flue connection adapter 333 is in a state capable of being connected to any one of the plurality of flue inserts 1211, 1231, and 1241 formed in the side wall 12 through a straight pipe 532. In this state, the elbow 531 maintains the coupling with the flue connection adapter 333 and rotates, so that it may be placed in a state that can be connected to the other one of the flue inserts 1211, 1231, and 1241 through the straight pipe 532.

For example, as illustrated in FIG. 16A, while the elbow 531a is connected to the flue connection adapter 333, it may be disposed to face the third sidewall 123. In this state, the elbow 531a may be connected to the flue insert 1231 formed in the third side wall 123 through the straight pipe 532a.

In this state, by rotating the elbow 531a while maintaining the coupling with the flue connection adapter 333, the elbow 531b may be disposed so as to face the first side wall 121 as shown in FIG. 16B. In the state of FIG. 16B, the elbow 531b may be connected to the flue insertion hole 1211 formed in the first side wall 121 through the straight pipe 532b.

As described above, when the flue connection adapter 333 according to an embodiment of the present invention is used, the flue 53 is moved in the vertical direction in the axial direction while the connection between the flue connection adapter 333 and the flue 53 is maintained. As the rotation is performed, the flue 53 may be inserted into the flue inserts 1211, 1231, and 1241 formed in each side wall 12. Therefore, although there is a limitation in the direction in which the flue 53 can be supplied to the space in which the oil boiler 1 is installed, the flue 53 can be provided and connected to the oil boiler 1 from a possible direction.

In the process of changing the connection position of the flue 53 described above, since the flue connection adapter 333 does not move or rotate, the air supply adapter 3333, which is a position where the corrugated pipe 52 of the supply pipe part is connected to the duct 33 Does not change the position of. Therefore, it is possible to prevent deformation of the supply pipe part, and stable air supply to the supply pipe part is possible.

Flame acquisition unit (43)

The oil boiler 1 according to an embodiment of the present invention may further include a flame acquisition unit 43. 17 is a perspective view of a burner housing 46 of an oil boiler 1 according to an embodiment of the present invention. 8, 9, and 17, the burner housing 46 includes a sensor hole forming part 463, a sensor hole 4630 is defined, and a flame acquisition part 43 is inserted therein.

The flame acquisition unit 43 is a component that acquires characteristics such as temperature from the flame. The flame acquisition unit 43 may be a UV sensor that receives ultraviolet rays generated from a flame located in the combustion chamber 22 and generates a measurement signal. The flame acquisition unit 43 may be electrically connected to the processor 152 and transmit the generated measurement signal to be used for calculation. Since the flame acquisition unit 43 can determine the presence or absence of a flame in the internal space 220, it is possible to determine whether a combustion reaction is taking place.

The flame acquisition unit 43 may be sensitive to temperature. Therefore, when the high-temperature heat generated in the combustion chamber 22 is easily transferred to the flame acquisition unit 43, the flame acquisition unit 43 may not perform its function.

The flame acquisition unit 43 should be able to check the flame generated in the internal space 220 of the combustion chamber 22. Accordingly, the flame acquisition unit 43 is disposed at a position in which the internal space 220 of the combustion chamber 22 can be viewed through the flame monitoring hole 4241 which is an opening formed in the burner fixing plate 424. In an embodiment of the present invention, the flame monitoring hole 4241 is formed by opening in the vertical direction, and the flame acquisition part 43 is inserted into the sensor hole 4630 formed in the vertical direction, so that the sensor hole 4630 is flame It communicates with the inner space 220 through the monitoring hole 4241, and the flame can be checked downward (D) through the flame monitoring hole 4241.

Specifically, the fixing plate portion 4242 of the burner fixing plate 424 may include a first surface exposed to the inner space 220 and a second surface that is an opposite surface thereof. A flame monitoring hole 4241 is formed by penetrating from the first surface toward the second surface. The flame acquisition part 43 may be spaced upward from the second surface to be installed.

The sensor hole 4630 is defined by being surrounded by a sensor hole forming part 463 that is a part of the burner housing 46. The sensor hole 4630 may be in communication with the outside so that the flame checker 43 can be inserted from the outside. Specifically, the burner housing 460 may have a housing upper wall 466 that is spaced upward from the burner fixing plate 434 to form a burner space 460 between the burner fixing plate 434 and the burner fixing plate 434. The sensor hole forming part 463 may have a tubular shape extending downward from the upper wall 466 of the housing. In an empty space inside the sensor hole forming part 463, a sensor hole 4630 may be defined.

The sensor hole forming part 463 may be partially opened to include a cooling hole 4631 communicating the sensor hole 4630 and the burner space 460. The cooling hole 4631 allows air to be introduced to cool the sensor hole forming part 463 and the flame acquisition part 43 with air. The cooling hole 4631 may be opened while facing the fuel nozzle 421.

The sensor hole 4630 is centered on the fuel nozzle 421 so that the combustion gas or the air in the combustion chamber 22 flows backward through the sensor hole 4630 to minimize affecting the burner space 460 and the blower 44. It may be disposed in a position opposite to the blower 44. Specifically, the blower 44 and the burner housing 46 are connected to each other, and air may be introduced from the blower 44 to the burner space 460 through the air inlet 4640. In this case, with respect to the air inlet 4640, the cooling hole 4631 may be located on the opposite side with respect to the fuel nozzle 421. The lower end of the flame acquiring part 43 inserted into the sensor hole 4630 may be spaced upward from the upper end of the cooling hole 4631 and may be located above the upper end.

In order to minimize the amount of fluid flowing into the sensor hole 4630 through the flame monitoring hole 4241, the diameter of the flame monitoring hole 4241 is smaller than the inner diameter of the tubular flame monitoring tube 4242 disposed on the upper side. Can be formed. The flame monitoring pipe 4242 surrounds the flame monitoring hole 4241 and protrudes upward from the burner fixing plate 424 so as to reduce the amount of air flowing into the flame monitoring hole through the cooling hole 4321. That is, the flame monitoring tube 4242 may surround the flame monitoring hole 4241 and protrude from the second surface toward the sensor hole 4630. As the flame monitoring tube 4242 is disposed, less nitrogen oxides may be generated compared to the other case.

The cross-sectional area of the flame monitoring hole 4241 in the horizontal plane may be 14% or more and 22% or less of the cross-sectional area of the hole defined inside the flame monitoring tube by the flame monitoring tube 4242. If the cross-sectional area of the flame monitoring hole 4241 is larger than the upper limit, excessively air flows through the flame monitoring hole 4241, making recirculation of the combustion gas disadvantageous and generation of nitrogen oxides may increase. If the cross-sectional area of the flame monitoring hole 4241 is smaller than the lower limit, it may not be possible to observe the flame of the flame acquisition unit 43 through the flame monitoring hole 4241.

A part of the upper side of the flame monitoring tube 4242 is inserted into the sensor hole 4630, and the length in the vertical direction overlapping with the sensor hole forming part 463 is less than 50% of the length in the vertical direction of the flame monitoring tube 4242 I can. This is to reduce the degree to which heat transferred from the combustion chamber 22 upward through the flame monitoring tube 4242 is transferred to the flame acquisition part 43 through the sensor hole forming part 463.

The upper end of the flame monitoring tube 4242 may be placed at the same height in the vertical direction as the sensor hole forming part 463. The upper end of the flame monitoring tube 4242 may not be located below the lower end of the sensor hole forming part 463. If the upper end of the flame monitoring tube 4242 and the lower end of the sensor hole forming part 463 do not meet or overlap, too much air passes through the flame monitoring hole 4241, reducing the recirculation flow rate of the combustion gas, and nitrogen oxides. This is because the incidence of can increase.

In addition, a part of the upper side of the flame monitoring tube 4242 may be inserted into the sensor hole 4630 and may be formed to be spaced inward from the inner surface of the sensor hole forming part 463 so as not to contact the inner surface of the sensor hole forming part 463. have. When both the inner surface of the sensor hole forming part 463 and the flame monitoring tube 4242 are formed in a cylindrical shape, the inner diameter of the sensor hole forming part 463 may be larger than the outer diameter of the flame monitoring tube 4242.

Due to the shape of each component described above, the amount of heat transferred to the flame acquisition unit 43 is reduced, so that the flame acquisition unit 43 can operate smoothly.

As described above, the oil boiler 1 is a flame tube portion 41 having an outer cylinder 21, a combustion chamber 22, a lower cover 29, a fire tube 23, a burner 42, and a recirculation hole 413. ), by generating a blue flame from oil-type fuel, it is possible to reduce the amount of nitrogen oxides generated.

In addition, as described above, the oil boiler 1 includes a combustion chamber 22, a burner 42, a blower 44, a supply pipe 51 having a total length longer than the length of a straight line connecting the inlet and the outlet thereof, and Including the heat exchanger, the height of the overall oil boiler 1 can be shortened, and the oil boiler 1 can be located in a limited space.

In addition, as described above, the oil boiler 1 is a flue connection adapter in which the combustion chamber 22, the burner 42, the blower 44, the supply pipe 51, the corrugated pipe 52 and the flue 53 are connected in communication. Including a duct 33 having a 333, a heat exchanger and a case 10, it may have various installation directions of the flue 53, and the supply pipe 51 is irrespective of the installation direction of the flue 53 The position to receive air is fixed through the corrugated pipe 52, so that the air flow rate to be supplied can be stably maintained.

In addition, as described above, the flame tube includes an upper flame tube 412 having an upper coupling portion and a lower flame tube 411 having a lower coupling portion coupled to the upper coupling portion, and can be easily assembled while being heated. It is possible to provide a flame tube that is not subject to corrosion or breakage. In addition, heat transfer to the combustion chamber cover 28 by the flame tube can be reduced.

In addition, as described above, the oil boiler 1 has an internal space 220 and a sensor at a location spaced apart from the combustion chamber 22, the flame checking unit 43 installed in the sensor hole 4630, and the flame checking unit 43. Including a burner 42 and a heat exchanger having a flame monitoring hole 4241 communicating the hole 4630, the amount of heat transferred to the flame acquisition unit 43 is reduced, and the flame acquisition unit 43 operates smoothly. You can ask to check the condition of the flame.

However, the components of the oil boiler 1 described above may be combined differently from the exemplary combination as necessary.

In the above, even if all the constituent elements constituting the embodiments of the present invention are described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the constituent elements may be selectively combined and operated in one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components Rather, it should be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art, unless otherwise defined. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

1: oil boiler
10: case
11: upper wall
12: side wall
13: lower wall
14: case space
15: control unit
16: expansion tank
17: fixing bracket
21: external cylinder
22: combustion chamber
23: association
24: septum
26: Turbulator
27: combustion guide
28: combustion chamber cover
29: lower cover
31: condensate receiver
32: trap part
33: duct
35: silencer
41: flame tube part
42: burner
43: flame acquisition unit
44: blower
45: fuel pump part
46: burner housing
47: Foreclosure acquisition unit
48: ignition transformer
51: supply pipe
52: corrugated pipe
53, 53a, 53b, 53c, 53d: year
111, 1211, 1231, 1241: year insert
121: first side wall
122: second side wall
123: third side wall
124: fourth side wall
151: control panel
152: processor
210: hollow
211: external cylinder entrance
212: external outlet
213: external cylinder extension
214: temperature acquisition unit
220: internal space of the combustion chamber
221: inner side
222: inner bottom
261: plate part
262: through part
263: protrusion
264: locking part
271: blocking plate
272: guide wall
273: guide leg
311: receiving part
312: separation part
320: condensate inlet
321: buoyant trap
322: U-shaped trap
323: spill container
331: duct straight portion
332: duct horizontal part
333: flue connection adapter
334: duct support
340: final discharge pipe
341: condensate piping
342: safety valve
343: drain valve
411: lower flame tube
412: upper flame tube
413: recirculation hole
414: tube protrusion
415: tube hole
421: fuel nozzle
422: air nozzle
423: spark plug
424: burner fixing plate
440: accommodation space
441: impeller
442: impeller case
443: blower drive motor
444: damper part
451: fuel pump
452: fuel pump drive motor
453: coupling part
455: fuel pump part case
460: burner space
461: cover packing
462: cover contact
463: sensor hole forming part
464: blower pipe
465: transformer fixing part
466: upper wall of the housing
511: inlet of the supply pipe
512: flange part
513: connection
514: straight portion
515: adapter part
517: orifice plate
531, 531a, 531b, 531c: elbow
532, 532a, 532b, 532c, 532d: intuitive
1212: handle
1233: case bracket
2211: combustion chamber connection
2221: bottom through hole
3110: receiving space
3211: buoyancy body
3212: storage unit
3213: middle outlet
3214: seat
3221: first outflow space
3222: second outlet space
3223: condensate passage
3230: discharge space
3231: trap inner wall
3232: external outlet
3233: drain opening
3234: safety opening
3331: internal adapter
3332: external adapter
3333: air supply adapter
3334: stopper
3421: safety line
3431: drain line
4110: tube space
4111: first tube part
4112: second tube part
4113: connection tube part
4121: tube flange
4140: lower hole
4151: vertical hole part
4152: horizontal hole
4153: locking hole
4241: Flame Monitoring Hall
4242: Flame Watcher
4243: fixed plate part
4244: circumference
4411: entrance of the impeller
4440: damper opening
4441: damper ring body
4442: flap
4443: O-ring
4511: shaft member of the fuel pump
4512: fuel supply pipe
4521: drive shaft of the fuel pump drive motor
4551: heat dissipation hole
4561: fuel piping
4562: recovery pipe
4630: sensor hall
4631: cooling hole
5110: entrance of the supply pipe
5120: outlet of the supply pipe
5121: Pressure relief hole
5161: first differential pressure measuring instrument
5162: second differential pressure measuring instrument
5311, 5321: inner pipe
5312, 5322: outer piping
D: down

Claims (11)

An upper flame tube provided to pass through a combustion chamber cover covering an upper end of the combustion chamber providing an internal space in which a combustion reaction takes place, and having an upper coupling portion in a region adjacent to the lower end positioned in the internal space; And
In the inner space, a tube space is defined by surrounding a partial space in which a mixture material of sprayed oil-type fuel and injected air is ignited, and a lower coupling provided to be coupled to the upper coupling part in an area adjacent to the upper end A flame tube comprising a lower flame tube having a wealth and having a lower end open. The method of claim 1,
The lower flame tube further includes a cylindrical first tube portion,
The lower coupling portion includes a tube protrusion formed to protrude radially outward from the first tube portion. The method of claim 2,
The lower flame tube further comprises a lower hole which penetrates the first tube part in a radial direction and is formed upward from the tube protrusion to an upper end of the first tube part. The method of claim 1,
The upper coupling portion, the flame tube including a tube hole formed through the upper flame tube so that the lower coupling portion can be inserted. The method of claim 4,
The upper flame tube is formed in a cylindrical shape,
The tube hole,
A vertical hole that penetrates the upper flame tube in a radial direction and is formed from a lower end of the upper flame tube up to a first distance; And
A flame tube that penetrates the upper flame tube in a radial direction, and includes a horizontal hole formed along the circumferential direction of the upper flame tube from an upper end of the vertical hole. The method of claim 5,
The tube hole,
The upper flame tube is penetrated in a radial direction, and further includes a locking hole formed from an end of the horizontal hole portion to which the vertical hole portion is not connected to a second distance shorter than the first distance from the end of the horizontal hole portion not connected to the circumferential direction The flame tube. The method of claim 1,
The lower flame tube,
A cylindrical first tube portion;
A cylindrical second tube portion having an inner diameter larger than the inner diameter of the first tube portion; And
Flame tube comprising a truncated cone-shaped connection tube portion connecting the first tube portion and the second tube portion. The method of claim 1,
In the upper flame tube, a recirculation hole formed through the upper flame tube is disposed so that the combustion gas generated by the combustion reaction is introduced from the outside of the upper flame tube to the inside. The method of claim 8,
The recirculation hole, when the lower flame tube is coupled to the upper flame tube, located above the upper end of the lower flame tube, flame tube. The method of claim 1,
The tube space is a space provided to ignite a mixture material of sprayed oil type fuel and injected air. A combustion chamber providing an interior space in which a combustion reaction takes place;
A combustion chamber cover covering the opened upper end of the combustion chamber;
A burner comprising a fuel nozzle for spraying oil-type fuel into the internal space of the combustion chamber, an air nozzle for injecting air into the internal space, and a spark plug igniting a mixture of the sprayed fuel and the injected air ;
A heat exchanger for heating the heating water by heat derived from the combustion reaction;
In the inner space, a tube space is defined by surrounding a partial space in which a portion of the fuel nozzle and a portion of the air nozzle are accommodated, and a flame tube portion having a lower end thereof is opened,
The flame tube part,
An upper flame tube passing through the combustion chamber cover and having an upper coupling part in a region located in the inner space, and a lower flame tube having a lower coupling part provided to be coupled to the upper coupling part and located in the inner space, and having an open lower end. That, the oil boiler.

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