KR20220163323A - Oil boiler - Google Patents

Abstract

In accordance with the present invention, an oil boiler includes: a combustion chamber providing an internal space in which a combustion reaction occurs; a burner including a fuel nozzle spraying oil-type fuel into the internal space of the combustion chamber, an air nozzle spraying the air into the internal space, and an ignition plug igniting a mixture substance of the sprayed fuel and the sprayed air; an air blower pumping the air into the air nozzle; an air supply pipe connected to the air blower to guide the air from the outside of the air blower to the air blower; and a heat exchanger heating water for heating with heat generated from the combustion reaction. The oil boiler also includes a flame tube part including a flame tube having an open lower end and defining a tube space by surrounding a partial space in which the mixture substance of the sprayed oil-type fuel and the sprayed air is ignited, in the internal space, and a recirculation hole formed by penetrating the flame tube such that the combustion gas in the internal space can be introduced inward from the outside of the flame tube. The flame tube includes: an upper flame tube; a first cylindrical tube part; a second cylindrical tube part having a larger inner diameter than that of the first tube part and located below the first tube part; and a lower flame part provided with a truncated cone-shaped connection tube part connecting the first tube part with the second tube part. The recirculation hole is formed on a body of the upper flame tube, and the first tube part is coupled to the upper flame tube, below the recirculation hole. Therefore, the present invention is capable of reducing heat transmission caused by the flame tube to a cover of the combustion chamber.

Description

Oil boiler {OIL BOILER}

The present invention relates to an oil boiler.

A boiler is a device that heats a desired area by heating the fluid in a vessel. Therefore, in order to heat the heating water of the boiler, the boiler uses a burner to cause a combustion reaction to generate flame and combustion gas, and generally has a structure that can heat the heating water using the heat transferred from the flame and the heat transferred by the combustion gas. have

The burner needs fuel to cause the combustion reaction. As the fuel, although liquefied petroleum gas or liquefied natural gas, which are a kind of fossil fuel, may be used, oil-type diesel or kerosene may also 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 liquid fuel is used, there is a high possibility that yellow flames are formed by soot generated from incomplete combustion. When soot is generated, passages inside the boiler prepared to allow combustion gas to flow in a predetermined path may be blocked. If the combustion gas does not flow smoothly, the boiler may not operate normally.

On the other hand, in the case of England and the like, the space where the boiler is installed is not provided in an open form, and has a limited volume and shape. Therefore, it is necessary to design a boiler with a space-intensive configuration so that all components of the boiler can be located in a limited space.

The present invention has been made to solve these problems, to provide a blue flame type oil boiler that can be located in a limited space.

An oil boiler according to an embodiment of the present invention includes a combustion chamber providing an internal space in which a combustion reaction takes place; A burner comprising a fuel nozzle for spraying oil-type fuel into the inner space of the combustion chamber, an air nozzle for spraying air into the inner space, and a spark plug for igniting a mixture of the sprayed fuel and the sprayed air. ; a blower for forcing air into the air nozzle; an air supply pipe connected to the blower to guide the air to the blower from the outside of the blower; and a heat exchanger for heating heating water by heat derived from the combustion reaction, and in the inner space, a tube space is defined by surrounding a partial space in which a mixture of sprayed oil-type fuel and sprayed air is ignited. And further comprising a flame tube portion having a flame tube whose lower end is open, and a recirculation hole formed through the flame tube so that combustion gas in the internal space flows from the outside to the inside of the flame tube, wherein the flame tube , an upper 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 located below the first tube portion, and the first tube portion and the first tube portion. It includes a lower flame tube having a truncated cone-shaped connection tube connecting the two tube parts, the recirculation hole is formed in the body of the upper flame tube, and the first tube part is coupled to the upper flame tube at a lower side than the recirculation hole. do.

Accordingly, by generating a blue flame while using oil-type fuel, the amount of nitrogen oxide generated during operation of the oil boiler can be reduced.

The overall height of the oil boiler is reduced, so that the oil boiler can be located in a limited space.

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

1 is a perspective view of an oil boiler according to an embodiment of the present invention.
2 is a view showing a situation in which a case of an oil boiler is removed according to an embodiment of the present invention.
3 is an exploded perspective view of an oil boiler according to an embodiment of the present invention.
4 is a longitudinal cross-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 of a portion 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 part for sending air to a burner in an oil boiler 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 unit of an oil boiler according to an embodiment of the present invention.
11 is a view showing an area where a pressure relief hole of an oil boiler according to an embodiment of the present invention is located.
12 is an exploded perspective view of a fuel pump unit of an oil boiler according to an embodiment of the present invention.
13 is a cross-sectional view of an air supply pipe of an oil boiler according to an embodiment of the present invention.
14 is a perspective view showing various forms in which a flue is connected 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 unit 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 components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed 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 hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. 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 in 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, the upper wall 11 located on the upper side, the lower wall 13 disposed opposite to the upper wall 11, and four The case 10 is formed in such a way that the side walls 12 define 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, although the handle 1212 is shown to be formed on the first side wall 121, the handle 1212 may also be disposed on the third side wall 123 opposite to the handle 1212. In the drawing, 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 respectively provided on two side walls 12 facing each other in one of the horizontal directions among the side walls 12 . Therefore, it is easy for the user to move the oil boiler 1 by holding and moving the handle 1212 .

A controller 15 may be disposed on the side wall 12 . The controller 15 may include a manipulation unit 151 and a processor 152 . The manipulation unit 151 may include a mechanical structure operable by a user and a display device capable of expressing the state of the oil boiler 1, and may be electrically connected to the processor 152. In one embodiment of the present invention, the control unit 15 is shown as being disposed on the second side wall 122, but the location is not limited thereto.

The processor 152 is a component that is electrically connected to each component of the boiler and performs control. The processor 152 is a component including an element capable of performing a logical operation for performing a control command, and may include a CPU (Central Processing Unit) 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 to transmit signals according to control commands to each component, and various sensors or It may be connected to acquisition units and receive acquired information in the form of a signal. Since the processor 152 can be electrically connected to each of the components, it can communicate with each other by further having a communication module that is connected by a wire or can communicate wirelessly.

The control command executed by the processor 152 may be stored and utilized in a storage medium, 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, or a non-volatile medium. However, the type is not limited thereto. Data required for the processor 152 to perform tasks may be further stored in the storage medium.

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

Outer cylinder (21)

The outer cylinder 21 is a component formed in a cylindrical shape, and accommodates the combustion chamber 22, the diaphragm 24, the fire tube 23, and the like in the hollow 210, which is a cylindrical space formed therein. The outer cylinder 21 may be formed of stainless steel. The components built into the outer cylinder 21 are integrally formed with the outer cylinder 21 and are equally composed of stainless steel, so that the entire oil boiler 1 can be lightened in weight.

Openings are formed at both ends of the outer cylinder 21, and a hollow 210 communicating with the openings at both ends is provided therein. An outer cylinder inlet 211 for introducing heating water into the hollow 210 is provided on the lower side, and an outer cylinder outlet 212 for discharging the heating water from the hollow 210 is provided on the upper side. 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 fire tube 23 and the combustion chamber 22. The heated heating water is discharged through an outlet and passes through a heating pipe (not shown) to perform heating.

The outer cylinder 21 extends in a vertical direction and includes an outer cylinder extension 213 serving as a wall of the outer cylinder 21, and may be formed in a cylindrical shape with lower and upper ends of the outer cylinder extension 213 open, 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 term that the combustion chamber 22 covers the opening may mean completely covering the rim of the opening located at the top of the outer cylinder 21 from the outside. However, with the rim of the opening protruding outward, the combustion chamber 22 is inserted into the opening of the outer cylinder 21 and coupled to the inner circumferential surface of the hollow 210 of the outer cylinder 21, thereby blocking the hollow 210 from the outside. Even if combined in such a way, it can be expressed as covering the opening.

The combustion chamber 22 is a cylindrical component that covers the 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 takes place in the inner space 220 to generate flame and combustion gas.

The combustion chamber 22 formed in a cylindrical shape extends from the upper end of the outer cylinder 21 toward the lower end 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 and transfer heat to the heating water. In addition, the burner 42 may generate combustion gas by heating the gas accommodated in the combustion chamber 22 . Combustion gas generated by heating of the heat source may be discharged from the combustion chamber 22 through the fire tube 23 to the outside. In this process, the combustion gas passing through the fire tube 23 can heat the heating water passing through the hollow 210 .

The combustion chamber 22 includes an inner bottom 222 . The surface located at the lower end of the combustion chamber 22 becomes the inner bottom surface 222. A bottom through-hole 2221 through which a pipe 23 to be described below may pass may be formed in the inner bottom surface 222 . That is, the inner bottom surface 222 may communicate with the outside by the association 23. The inner bottom surface 222 may be separable from the combustion chamber 22, or the combustion chamber 22 and the inner bottom surface 222 may be integrally formed. The inner bottom surface 222 may be formed in a horizontal circular shape, 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 can be 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 outer cylinder 21 that is sealed. have. However, the diameter of the extension of the combustion chamber extending from the upper end of the outer cylinder 21 to the lower end of the outer cylinder 21 may be smaller than that of the outer cylinder 21 . Therefore, the combustion chamber 22 may have a combustion chamber connecting portion 2211 having a tapered shape while continuing from the combustion chamber extension to the upper end of the combustion chamber 22 . An inner side surface of the combustion chamber extension may be an 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 extension of the combustion chamber is smaller than that of the outer cylinder 21, so that the extension of the combustion chamber may be spaced apart from the inner surface of the outer cylinder 21. Therefore, a flow space can be formed between the inner surface of the outer cylinder 21 and the outer surface of the combustion chamber extension.

Heating water may flow from the hollow 210 through the flow space. The outlet of the outer cylinder 21 formed at 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 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 a combustion chamber cover 28 . Components of a burner 42 to be described later may pass through the combustion chamber cover 28 .

Heat exchanger (fire tube (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. Combustion gas passes through the fire tube 23, and heating water flows along the periphery of the fire tube 23 in the hollow 210, thereby performing heat exchange. The combustion gas may pass through the heat exchanger downward, forming a downward 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 pipe 23 can pass therethrough. Accordingly, heating water may be located in a space defined by the lower cover 29, the combustion chamber 22, and the outer cylinder 21 in the hollow 210.

A plurality of fire tubes 23 are disposed between the lower cover 29 and the combustion chamber 22, and the internal space 220 of the combustion chamber 22 and the condensate receiver 31 space formed on the lower side of the lower cover 29 It is a tubular component that communicates. Therefore, the plurality of pipes 23 guide the combustion gas generated in the combustion chamber 22 to the lower side of the lower cover 29 via the hollow 210 of the outer cylinder 21 . According to one embodiment of the invention, the linkage 23 extends along a vertical direction. The heated combustion gas moves downward (D) through the fire tube (23). During the movement of 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 is performed through the fire tube 23.

The fire tube 23 is composed of a plurality, and may be arranged 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 disk-shaped diaphragm 24 to be described later. Accordingly, as in one embodiment of the present invention, the links 23 may be arranged at regular intervals along one circumference. However, the pipes 23 may be arranged at regular intervals along two circumferences of different diameters, and may be arranged in two stages, and the arrangement is not limited thereto.

The fire tube 23 may be provided in the form of a flat tube. Specifically, when the widths respectively defined in two directions extending perpendicularly to each other on a horizontal plane are referred to as a first width and a second width, the pipe 23 has a width greater than the first width of the internal passage through which the combustion gas passes. The second width may be formed in a narrow form. Since the outer cylinder 21 may be formed in a cylindrical shape, the first width may be arranged in parallel with the radial direction of the cylinder, and the second width may be arranged in parallel with the circumferential direction of the cylinder.

A turbulator 26 may be disposed in the fire tube 23 . The turbulator 26 is a device for turbulizing the flow of combustion gas passing through the fire tube 23. Specifically, the turbulator 26 is formed to protrude from the plate-shaped portion 261 extending in the vertical direction, a plurality of penetrating portions 262 formed through the plate-shaped portion 261, and the plate-shaped portion 261. A plurality of protrusions 263 may be included. Since the plate-shaped portion 261 inserted along the fire pipe 23 has a plurality of penetrating portions 262 and protrusions 263, the combustion gas passing through the fire pipe 23 is turbulent while being obstructed or promoted in its flow. do.

When the turbulator 26 is inserted from the upper side to the lower side (D) of the fire tube 23, 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. A locking portion 264 protruding in any one of the horizontal directions may be further included. The hooking portion 264 protrudes from the plate-shaped portion 261 in one of the horizontal directions, and is bent to more stably fix the plate-shaped portion 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 component formed in a disk shape, and may be disposed between the lower cover 29 and the combustion chamber 22 in any one of the horizontal directions.

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 through. As the diaphragm 24 divides the hollow 210 into a plurality of regions, a passage through which the heating water flowing inside the hollow 210 moves can be formed. A plurality of diaphragms 24 are arranged as shown, so that a flow path of heating water can be formed more complicatedly.

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

Condensate tray (31)

The condensate receiver 31 is a component for receiving and discharging condensed water and is located on the lower side of 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 condensate 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 to accommodate the falling condensate. Including, doedoe connected from the receiving portion 311 may further include a separating portion 312 connected to the duct 33. In addition, a condensate pipe 341 connecting the separation unit 312 and the trap unit 32 to transfer condensed water to the trap unit 32 may be disposed. The condensed water in the separating unit 312 is transferred to the trap unit 32 through the condensed water pipe 341 by its own weight, and the combustion gas goes upward through the duct 33.

A silencer 35 may be disposed in the separation unit 312 . A situation in which the silencer 35 is disposed on the receiving part 311 can be considered, but in this case, there is a problem in that the height of the receiving part 311 in the vertical direction increases. Therefore, 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 and the height of the entire oil boiler 1 can be reduced.

The silencer 35 is specifically formed of a porous plate, and generates resistance to the flow of combustion gas discharged to the duct 33 through the receiving portion 311. As resistance is generated to the flow of the combustion gas, the impeller (441 in FIG. 11) rotates at a speed higher than the rotational speed of the impeller (441 in FIG. 11) included in the blower 44 when the silencer 35 is not present. Control by the processor 152 may be made to do so. Accordingly, a larger flow rate of air is provided to the air nozzle 422 through the blower 44, so that the combustion gas can be easily pushed out through the fire tube 23 and the duct 33 and discharged. Backflow can be prevented and ignition noise can be reduced. How the processor 152 controls the blower 44 by generating resistance to the flow of combustion 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 the combustion chamber 22 smaller than the size of the combustion chamber 22 of the oil boiler 1 in which the ignition noise is not reduced, and the height of the combustion chamber 22 can be shortened, thereby reducing the overall It may have the effect of shortening the height of the oil boiler (1).

Duct(33)

Separator 312 is connected to the upwardly extending tubular duct 33, the combustion gas can be exported to the outside through the duct 33. The duct 33 is not formed by extending only in one direction, but extends in a vertical direction and includes a duct straight portion 331 into which combustion gas discharged from the outer cylinder 21 flows in and an outlet of the duct 33. It may include a formed flue connection adapter 333 and a duct horizontal part 332 that extends in any one of the horizontal directions and connects the duct straight part 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 apart from the duct straight portion 331 in one of the horizontal directions. Accordingly, the straight duct portion 331 and the flue connection adapter 333 may be spaced apart from each other along one of horizontal directions.

The overall height of the oil boiler 1 in the vertical direction can be influenced by the length of the duct 33. Since the duct 33 is formed in this way, 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 the duct straight portion 331 in one of the horizontal directions, and is not formed straight in one direction, and is eccentric. may have an unbalanced structure. For example, while the flue (53 in FIG. 15) is coupled to the inlet of the duct 33, the flue connection adapter 333 may be pressed downward (D). In this situation, since both ends of the duct horizontal portion 332 are connected to the flue connection adapter 333 receiving force and the duct straight portion 331 fixed to the separating portion 312, a bending moment is applied. The force applied when the flue (53 in FIG. 15) is coupled is transmitted to the straight duct portion 331 through the horizontal duct portion 332, resulting in damage to the straight portion 331 or the horizontal portion 332 of the duct. can

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

The fixing bracket 17 may be provided on an outer surface of the outer cylinder extension part 213 of the outer cylinder 21 . As the duct support 334 is fixed to the fixing bracket 17, even when the above-mentioned force is applied to the duct 33, the duct support 334 through the fixing bracket 17 or the case bracket 1233 The duct 33 is supported, so that breakage 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 an ignition plug 423 to enable this 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 to receive oil-type fuel from the fuel pump unit 45, and the fuel pump 451 pumps the fuel. The fuel is sprayed into the inner space 220 at that pressure. 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 atomized oil-type fuel may be vaporized by high-temperature combustion gas circulated through a recirculation hole 413 of the flame tube unit 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 surrounding the fuel nozzle 421 . Air may be injected through an air injection hole 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 in which the width decreases toward the downward direction (D), and the air nozzle 422 may also have a shape in which the lower end thereof decreases toward the downward direction (D).

The flow rate of air sprayed by the air nozzle 422 and the flow rate of fuel sprayed by the fuel nozzle 421 may 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 fuel sprayed by the fuel nozzle 421 , may be controlled by the processor 152 . The air flow rate supplied to the air nozzle 422 may be adjusted by the processor 152 controlling the blower 44 supplying air to the air nozzle 422 . The fuel flow rate supplied to the fuel nozzle 421 may be adjusted by the processor 152 controlling the fuel pump unit 45 supplying fuel to the fuel nozzle 421 .

Burner 42 includes spark plug 423 . The spark plug 423 is a component that ignites a mixture of sprayed fuel and sprayed air. The spark plug 423 can create an electrical spark to ignite the mixture. 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 ignition plug 423, the fuel nozzle 421, and the air nozzle 422 may be fixed. The burner fixing plate 424 is composed of a plate body, but is inserted into 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 blown into the air nozzle 422. ), it is possible to block a significant part from moving to the flame tube unit 41 without passing through.

A description of the burner housing 46 forming the burner space 460 between the burner fixing plate 424 included in the burner 42 and the burner fixing plate 424 and the combustion chamber cover 28 is given with reference to FIG. 8 . 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 an enlarged longitudinal cross-sectional view of a portion of the flame tube portion 41 of the oil boiler 1 according to an embodiment of the present invention.

The flame tube portion 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 unit 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 high pressure, and accordingly, through the recirculation hole 413 Combustion gas located outside the flame tube unit 41 may flow into the flame tube unit 41 having a reduced pressure. A recirculation hole 413 is formed through the flame tube so that combustion gas in the internal space 220 of the combustion chamber 22 flows from the outside of the flame tube 411, 412 to the tube space 4110 located inside.

The recirculation hole 413 may be formed in the 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 disposed spaced apart from each other along the circumferential direction of the upper flame tube 412 .

While 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 to circulate the combustion gas.

The tube space 4110 is a space prepared to ignite a mixture of fuel and air, and in the interior space 220, a portion of the space in which the mixture of the sprayed oil-type fuel and the sprayed air is ignited is a flame tube unit ( 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 circulates, oil-type fuel sprayed by the fuel nozzle 421 and existing in a droplet state may be vaporized. Although oil-type fuel is used, it is ignited by converting the fuel to gaseous state, so similar to boilers that use gaseous fuel, it generates high-temperature blue flames instead of low-temperature yellow flames and achieves high fuel efficiency. can It is also possible to use configurations similar to boilers using gaseous fuel.

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

The flame tubes 411 and 412 are components that surround an area where fuel is sprayed from the fuel nozzle 421 in the inner space 220 and have a lower end open.

The flame tube unit 41 may have a first tube unit 4111, a second tube unit 4112, and a connection tube unit 4113 connecting them. Each of these tube parts may be formed in 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 cross section diameter of the second tube part 4112 may be larger than the diameter of the first tube part 4111 in the cross section. The connecting tube portion 4113 connects the first tube portion 4111 and the second tube portion 4112, and since the diameters of the two tube portions are different, the connecting tube portion 4113 may be formed in a truncated conical shape. The connecting tube portion 4113 may have a shape in which a diameter in a cross section increases toward the downward direction (D).

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

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

The flame tube portion 41 is formed in a tapered shape, so that the flame is not formed long and 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 a tube flange 4121 protruding radially outward from the cylindrical body at its upper end so as to be coupled to and fixed to the combustion chamber cover 28. The tube flange 4121 may be seated on the combustion chamber cover 28 and fastened to the combustion chamber turbo 28 using fasteners.

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 from the combustion chamber cover 28 (D). A lower flame tube 411 may be coupled to a 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 drawing, 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 their relative positions with respect to each other can be fixed.

The tube protrusion 414 may be formed on the first tube part 4111 . The tube protrusion 414 may be formed by protruding outward from a position adjacent to the upper end of the lower flame tube 411 . The tube protrusion 414 may be formed by folding outwardly a portion extending from the upper end of the lower flame tube 411 downward (D), 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 by penetrating the first tube portion 4111 in a radial direction.

The size of the lower hole 4140 may be larger than that of the tube protrusion 414 . Specifically, after forming two holes of a predetermined size at a predetermined interval along the circumferential direction of the first tube portion 4111 in a perforation method, the remaining protruding part in the middle is folded toward the outside in the radial direction, as shown in FIG. The lower hole 4140 and the tube protrusion 414 may be formed, but the forming method is not limited thereto.

The tube hole 415 may be formed by penetrating the upper flame tube 412 in a 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 part 4151 in the vertical direction be the first distance.

A horizontal hole 4152 extending in one direction along the circumference of the upper flame tube 412 from an upper end of the vertical hole 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 hooking hole portion 4153 extending downward (D) from an end of the horizontal hole portion 4152 . The hooking hole 4153 may have a length in the vertical direction equal to a second distance smaller than the first distance.

The tube hole 415 and the tube protrusion 414 are configured in plurality, and may be spaced apart from each other by a predetermined interval along the circumference of the flame tube. Since the number of tube holes 415 and tube protrusions 414 correspond to each other, 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 to insert the tube protrusion 414 into the vertical hole portion 4151. Thereafter, the lower flame tube 411 is rotated in the vertical direction in the axial direction so that the tube protrusion 414 may move along the horizontal hole 4152 . Thereafter, the lower flame tube 411 is moved downward (D) so that the tube protrusion 414 can be caught in the catching hole 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 a separate fastener such as bolting. Therefore, it may not be deformed by heat generated during welding, and the part fastened by the fastener may be prevented from being corroded or damaged when a high temperature occurs. In addition, the amount of heat transferred from the hot lower flame tube 411 to the upper flame tube 412 can be reduced.

In addition, the upper flame tube 412 and the lower flame tube 411 are composed of separate materials, the lower flame tube 411 is made of a material that can maintain its structure and physical characteristics even at high temperatures, and the upper flame tube 412 It can also be constructed using materials that are relatively vulnerable to high temperatures. Since materials that can withstand high temperatures are very expensive, it is possible to configure a more economical boiler than in the case of 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 and reverses the flow direction of the combustion gas. A combustion reaction occurs by the burner 42, and the combustion gas generated therefrom goes downward (D). The combustion gas heading downward (D) may meet the combustion guide 27 and its flow direction may be reversed upward. Therefore, the combustion guide 27 may be located below 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 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 disc shape. While the combustion gas moves downward (D), it collides with and is reflected from 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 and is attached to the blocking plate 271. reach Since the flame does not directly touch the inner bottom surface 222 of the combustion chamber 22, boiling noise generated by rapid boiling of heating water positioned below the inner bottom surface 222 can be reduced.

The guide wall 272 extends upward from the blocking plate 271 and may be formed along an edge of the blocking plate 271 . Accordingly, 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 , combustion gas reflected from the blocking plate 271 may move upward along the guide wall 272 .

A portion of the combustion gas moved upward by the guide wall 272 is circulated inside the flame tube through the recirculation hole 413, and the rest collides with the combustion chamber cover 28 or the nozzle flange so that the flow direction is downward ( D) is reversed. Therefore, 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 extending downward (D) from the blocking plate 271 . The guide leg 273 extends downward (D) from the blocking plate 271, and a lower end thereof may contact the inner bottom surface 222 of the combustion chamber 22. Accordingly, 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 surface 222 of the combustion chamber 22 are spaced apart from each other by the guide leg 273, and the flow passes through the space between the blocking plate 271 and the inner side surface 221 of the combustion chamber 22. The combustion gas to move downward (D) through the pipe 23 disposed through the inner bottom surface 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 Therefore, the boiling noise of heating water can be reduced.

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

A heat insulating material (not shown) may be disposed on the combustion guide 27 to have heat and sound insulation effects. This insulation 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 for sending air to the burner 42 according to an embodiment of the present invention. 9 is an exploded perspective view of a burner assembly of an oil boiler 1 according to an embodiment of the present invention. 10 is an exploded perspective view of the damper unit 444 of the oil boiler 1 according to an embodiment of the present invention. 11 is a view showing an area where a pressure relief hole 5121 of the oil boiler 1 according to an embodiment of the present invention is located.

Further referring 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, a fuel pump unit 45, a flame tube unit 41, a combustion chamber cover 48, a burner housing 46, an air supply pipe 51, an ignition It is an assembly that may include a transformer 48, a flame acquisition unit 43, and the like.

The burner assembly is configured by inserting the burner 42 into a hole formed in the center of the combustion chamber cover 48 in a state in which components such as the flame tube part 41 are assembled to the combustion chamber cover 48 using fasteners, etc. It can be provided in a way to settle. As the burner assembly is formed in this way, the coupling relationship between the components of the oil boiler 1 can be easily dismantled and cleaned.

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 delivering it to the air nozzle 422, a blower driving motor 443 for transmitting a 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 unit 444 may be disposed in the blower pipe 464 . The damper unit 444 includes a flap 4442 that can move between a first position in which the blow pipe 464 is opened and a second position in which the blow pipe 464 is closed.

The damper portion 444 is formed in an annular shape and further includes a damper ring body 4441 having a damper opening 4440 at the center, so that the flap 4442 is rotatably coupled to one side of the damper ring body 4441. can have The damper ring body 4441 is disposed in an oblique direction to the direction in which the blower pipe 464 extends, and the lower side protrudes further to one side where the flap 4442 is located, so that the flap 4442 can be seated when it rotates by its own weight You can have a stance. As the flap 4442 rotates, it is disposed in the second position to cover the damper opening 4440, thereby closing the blow pipe 464. As the flap 4442 rotates, it may be disposed at a first position spaced apart from the damper opening 4440 to open the blow pipe 464 .

When the blower 44 is operated, the flap 4442 may be pressurized by the air flow generated by the blower 44 and positioned at the first position. When the blower 44 is not operating, 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 air supply pipe 51 and the flue 53, or is discharged to the outside to generate an unpleasant odor, the flap 4442 ) can be prevented by closing the blow pipe 464.

When the damper ring body 4441 is placed on the air blow pipe 464, the O-ring 4443 is fitted along its circumference, so that airtightness can be maintained at the boundary between the damper ring body 4441 and the inner surface of the blow pipe 464. The O-ring 4443 may be formed of a flexible material.

The impeller 441 compresses and supplies the introduced air by rotating. 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 the shape of a gentle cone or truncated cone, 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 wings 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 accommodation space 440 inside the impeller case 442 to face downward (D). However, the shape and arrangement direction of the impeller 441 are not limited thereto.

The blower driving motor 443 receives power and is electrically connected to the processor 152 so that it can be controlled. The blower driving motor 443 is connected to the impeller 441 and transmits 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 brushless DC (BLDC) motor, but the type is not limited thereto. As the blower driving 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 driving 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 the accommodation space 440 and the outlet 5120 of the air supply pipe. The impeller case 442 is formed surrounding the impeller 441, so air can be well pumped by the impeller 441 without leaking.

The impeller case 442 has an opening of the case 10 communicating the outlet 5120 of the air supply pipe and the accommodation space 440 therein. The opening of the case 10 may be formed in an area adjacent to the inlet 4411 of the impeller. The air supply pipe 51 includes a pipe portion having an inlet and an outlet provided at both ends, and a flange portion 512 extending outward at the end where the 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 areas on the impeller case 442 .

The air 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 outside of the impeller case 442, and may be provided along the rim of the outlet 5120 of the air supply pipe, which is the outlet of the pipe portion. . The pressure relief holes 5121 may be formed in plurality and may be spaced apart from each other along the rim of the outlet of the pipe unit.

The pressure relief hole 5121 is disposed to block the reverse flow of combustion gas and air from the combustion chamber 22 to the air supply pipe 51 due to an explosion occurring in a situation such as when fuel is ignited. The pressure relief hole 5121 is formed, so that even if the combustion gas or air flows backward 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. It can be. Therefore, the flow rate of air or combustion gas flowing back to the air supply pipe 51 can be significantly reduced.

The pressure relief hole 5121 may be formed in a funnel shape with a diameter narrowing 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 due to its shape, so that noise can be prevented.

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

The burner fixing plate 424 may be formed in a disk shape, and a portion bent downward (D) at an edge portion of the disk may be present. This part can contact the inner surface of the upper flame tube 412 to maintain airtightness and secure the upper flame tube 412 and the burner fixing plate 424 well.

Specifically, the burner fixing plate 424 may include a disk-shaped fixing plate portion 4243 and a peripheral 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 contacts the inner surface of the upper flame tube 412 of the flame tube portion 41, and the lower end of the circumferential portion 4244 is disposed to be observable from the outside through the recirculation hole 413. It can be. That is, the lower end of the circumferential portion 4244 may be located above the middle position of the recirculation hole 413 based on the vertical direction. By minimizing the area of the circumferential portion 4244 exposed through the recirculation hole 413, heat transfer to the flame acquisition portion 43, which will be described later, can be reduced.

The width of the recirculation hole 413 may be adjusted by adjusting the height of the circumferential portion 4244 that blocks a portion of the recirculation hole 413 . Therefore, 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 the corresponding capacity.

The lower end of the circumferential portion 4244 may be located above the recirculation hole 413 . Accordingly, an overlapping area between the circumferential portion 4244 and the recirculation hole 413 may not exist.

The burner housing 46 is a component that forms a burner space ( 460 in FIG. 8 ) surrounding a part of the fuel nozzle 421 and a part of the ignition plug 423 together with the burner fixing plate 424 . The blower 44 supplies air to 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 as

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 part of the upper surface of the combustion chamber cover 28. By contacting and coupled to each other, a separation 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 contact the combustion chamber cover 28 and be coupled using a 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 come into contact, a smaller amount of 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. Since the degree of heating of the burner housing 46 is reduced, the degree of heating of the flame acquisition unit 43 to be described later 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 keep the burner space 460 airtight.

Also, a portion of the burner housing 46 positioned 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 pipe 464 . The oil boiler 1 according to an embodiment of the present invention may include an ignition transformer 48 that receives normal power, boosts it, and provides it to the spark plug 423 so that sparks can occur. A fixing part 465 is provided to fix the ignition transformer 48. The blower pipe 464 is connected to the blower 44 and serves as a passage through which air is pressured into the burner space 460 . An outer part of the transformer fixing part 465 and an outer part 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, thereby reducing 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.

Further referring to FIG. 12, the 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 include a coupling unit 453, a fuel pump unit case 455, and a heat radiation hole 4551 can do.

The fuel pump 451 is a component having gears for compressing fuel and delivering it to the fuel nozzle 421 . Therefore, the fuel pump 451 may be a gear pump that injects by compressing the fluid between gears meshed with each other. The fuel pump 451 may receive fuel by being connected to a fuel pipe 4561 through which fuel flowing from a fuel storage unit (not shown) passes, and may be connected to a recovery pipe 4562 to inject and store the remaining fuel as fuel. You can return to section 3212.

The fuel pump driving motor 452 is a component that transmits driving force to the fuel pump 451 to rotate the 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 the driving force, the length of the member used as the shaft is reduced to reduce the amount of eccentricity, the driving torque can be reduced, and power consumption can be reduced. can reduce

The fuel pump driving motor 452 is configured to compress the fuel at any one of the first fuel flow rate and the second fuel flow rate greater than the first fuel flow rate so that the fuel pump 451 can supply the fuel to the fuel nozzle 421, It can be controlled by the processor 152. Therefore, the fuel pump 451 is capable of providing at least two stages of fuel flow rate, but in addition to the first fuel flow rate and the second fuel flow rate described above, the fuel flow rate of other fuels that are not the same as 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 the fuel pump provided to rotate gears and a drive shaft 4521 of the fuel pump drive motor provided to transmit driving force of the fuel pump drive motor 452, the coupling part 453 ) can be connected.

The coupling unit 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 drive motor are not coaxial with each other and are in an eccentric state, the driving force of the fuel pump drive motor 452 is transmitted to the gear of the fuel pump 451. It can be. In addition, it is possible to drive the fuel pump 451 with a small torque even in an eccentric state.

The fuel pump unit 45 is a fuel pump unit case 455 having a built-in space for housing the shaft member 4511 of the fuel pump, the coupling unit 453, and the drive shaft 4521 of the fuel pump drive motor. can have A heat dissipation hole 4551 may be formed in the fuel pump unit case 455 . The heat dissipation hole 4551 is an opening that passes through the fuel pump unit case 455 and communicates the built-in space with the outside of the fuel pump unit case 455 . Since the heat dissipation hole 4551 is open, heat generated during coupling can be dissipated. In addition, the heat radiation hole 4551 is formed to a size that allows the passage of the coupling part 453, and through the heat radiation hole 4551, the coupling part 453 is connected to the shaft member 4511 of the fuel pump and the driving shaft of the fuel pump driving motor. Can be assembled at (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 at the first fuel flow rate, which is relatively less than the second fuel flow rate, is provided to the fuel nozzle 421, the ignition noise generated when ignition is performed while consistently providing fuel at the same flow rate as the second fuel flow rate is smaller than that of the ignition noise. A large ignition noise may occur.

The oil boiler 1 according to an embodiment of the present invention may further include a temperature acquisition unit 214 for acquiring 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, can indirectly acquire the temperature of the combustion chamber 22, and can be formed as a thermocouple, but its type and location It is not limited thereto.

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

The processor 152 according to an embodiment of the present invention may be electrically connected to the temperature acquisition unit 214 . This is to solve the above problems as the processor appropriately controls the fuel pump unit 45 according to the temperature of the combustion chamber 22 .

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 so that the temperature of the combustion chamber 22 obtained by the temperature acquisition unit 214 is set to a predetermined temperature. may exceed the upper limit of In this case, the processor 152 may control the fuel pump unit 45 to supply fuel to the fuel nozzle 421 at a first fuel flow rate. Accordingly, overheating of the combustion chamber 22 can be prevented, the amount of nitrogen oxides 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 does not reach a predetermined lower limit value. 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. Therefore, it is possible to prevent a situation in which heating water cannot be smoothly heated because the combustion chamber 22 cools down, and ignition noise and reverse flow generated when a combustion reaction is stopped and then resumed can be prevented.

air supply part

The air supply unit 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, and air introduced from the flue 53 to the flue connection adapter 333 is supplied. The outlet of the corrugated pipe 52 communicates with the inlet 5110 of the air supply pipe to supply air to the air supply pipe 51 . The inlet part 511 of the air supply pipe forming the inlet 5110 of the air supply pipe is inserted into the outlet of the corrugated pipe 52, and the corrugated pipe 52 and the air supply pipe 51 may be coupled to each other. An outlet 5120 of the air supply pipe communicates with an opening of the case 10 of the impeller case 442 to supply air to the blower 44 .

That is, the air supply pipe part is formed by connecting the air supply pipe 51 and the corrugated pipe 52, the inlet of the air supply pipe part becomes the inlet of the corrugated pipe 52, and the outlet of the air supply pipe part becomes the outlet 5120 of the air supply pipe. With this structure, the air supply unit guides external air to the blower 44 and consequently 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 has a variable overall shape and length. Therefore, the position of the outlet and the inlet can be freely determined and the deformation is easy, so even if the position of the air 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 air supply pipe 51 may be formed longer than the length of a straight line straightly connecting the inlet 5110 of the air supply pipe and the outlet 5120 of the air supply pipe. That is, the air supply pipe 51 is not formed in a cylindrical pipe shape in which an inlet and an outlet are connected straight, but has a bent or bent portion.

When the mixed material is ignited, pressure of combustion gas and air flowing backward from the internal space 220 of the combustion chamber 22 toward the blower 44 may be generated and acted upon by the explosion of the mixed material. However, air pressure 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 air supply pipe 51 may be formed so that the combustion gas or air flowing backwards does not pass through the air supply pipe 51 based on the magnitudes of the two pressures described above. When the length of the air supply pipe 51 is increased, the magnitude of resistance applied to the backflowing fluid may increase.

In addition, the inner diameter of the air supply pipe 51 may be formed to prevent backward flowing combustion gas or air from passing through the air supply pipe 51 based on the above-mentioned two pressures. When the inner diameter of the air supply pipe 51 is reduced, the magnitude 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. Wind pressure at the time of ignition of the blower 44 may be about 100mmH ₂ O. Therefore, in the inner diameter and total length of the air supply pipe 51, air flow may not occur even when the differential pressure between the inlet 5110 and the outlet 5120 of the air supply pipe 51 is equal to 50 mmH ₂ O, which is the difference between the two pressures. It may be formed so that the air supply pipe 51 has a resistance of a certain size.

The air supply pipe 51 connects a plurality of straight parts 514 extending straight and two adjacent straight parts 514 so that the air supply pipe 51 has a bent or bent part, but the two straight parts ( 514 may include a connecting portion 513 that is disposed perpendicularly to each other. By having at least one connecting portion 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 can occupy a minimum space while having a long length. The straight portion 514 and the connecting portion 513 may form the above-described pipe portion.

13 is a cross-sectional view of the air supply pipe 51 of the oil boiler 1 according to an embodiment of the present invention. Further referring to FIG. 13, the internal structure of the air supply pipe 51 and the control of the blower 44 using the same will be described. Differential pressure measuring instruments 5161 and 5162 may be disposed at two points of the air supply pipe 51, respectively. Among the differential pressure measurement spheres 5161 and 5162, the differential pressure measurement sphere located upstream along the air flow direction when the blower 44 is operating is the first differential pressure measurement sphere 5161, and the differential pressure measurement sphere located downstream is the second differential pressure measurement sphere ( 5162). To acquire the differential pressure between the two differential pressure measurement spheres 5161 and 5162, the differential pressure acquisition unit 47 is connected to the two differential pressure measurement spheres 5161 and 5162. The differential pressure acquisition unit 47 may be a device that obtains 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 that causes a pressure drop in flowing air to cause the pressure of the second differential pressure measuring sphere 5162 to be smaller than the pressure of the first differential pressure measuring sphere 5161 to generate a differential pressure between two points. Specifically, the orifice plate 517 is formed as a plate having a hole in the center of which the cross-sectional area decreases as the air flows, so that a pressure drop occurs during air flow.

An adapter unit 515 may be disposed upstream of the orifice plate 517 based on the air flow direction. The adapter part 515 includes the inlet 5110 of the air supply pipe, but may have an inner diameter larger than the inner diameter of the pipe part to be disposed downstream of the orifice plate 517 at a position adjacent to the orifice plate 517 . However, at other locations, the inner diameter may be smaller or larger than the aforementioned inner diameter depending on the capacity of the oil boiler 1. The adapter unit 515 may be detachably coupled to a pipe unit 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 transfers 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 speed among a plurality of different speeds.

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

An oil boiler 1 in which the blower 44 rotates only at the same speed can be considered. In such an oil boiler 1, since the blower 44 is not controlled according to the change in differential pressure, there is no way to cope even if the flow of combustion gas is disturbed. Therefore, the air flow rate of the air provided to the burner 42 gradually decreases, and eventually the flame is turned off, and 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 the 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. Therefore, the reduced differential pressure can reach the reference differential pressure again, and the decreased air flow rate increases again, so that a state in which a uniform and smooth combustion reaction can occur in the burner 42 is maintained.

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 rotates at the same speed, and the differential pressure obtained may exceed the standard differential pressure. In this case, the processor 152 controls the blower 44 so that the speed at which the impeller 441 rotates decreases. Therefore, the increasing differential pressure can reach the reference differential pressure again, and the increasing air flow rate decreases again, so that a state in which a uniform and smooth combustion reaction can occur in the burner 42 is maintained.

Trap part (32)

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

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

The trap unit 32 may include a buoyancy body 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. On the upper side of the storage unit 3212, the condensed water inlet 320 connected to the condensate pipe 341 communicates with each other, so that condensed water can be delivered to the storage unit 3212.

The buoyancy body 3211 floats or sinks by the water stored in the buoyancy body trap 321 . Here, the stored water may be condensed water or may be separate water filled for initial boiler operation. The lower surface of the storage portion 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 buoyancy body 3211 may be seated on or separated from the seating portion 3214 . When the buoyancy body 3211 floats 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 can 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 buoyancy body trap 321 can operate so that the condensed water is discharged through the middle discharge port 3213, but the combustion gas is not discharged.

The U-shaped trap 322 is a trap including a first outflow space 3221 and a second outflow space 3222 . The U-shaped trap 322 has a structure in which water discharged from the buoyancy body trap 321 is stored and acts as a trap in which combustion gas cannot escape. The first outflow space 3221 is a space disposed below the middle outlet 3213 of the buoyancy body trap 321 to store water discharged downward from the buoyancy body trap 321 (D). The second outflow space 3222 is a space extending upward from the first outflow space 3221, and when the volume of water stored in the first outflow space 3221 becomes larger than the volume of the first outflow space 3221, the second outflow space 3221 The outflow space 3222 also starts to fill up with water. The second outflow space 3222 may extend upward from the first outflow space 3221 and surround the storage unit 3212 to form a U-shaped trap together with the first outflow space 3221 .

Some areas of the trap inner wall 3231 defining the second outflow space 3222 have a condensed water passage 3223 that is lower than other areas and has an opening. When the water level reaches the height of the condensate passage 3223 as the second outflow space 3222 is filled with water, the water escapes into the outflow 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 outflow container 323, and the stored water is discharged to the outside of the boiler through the final discharge pipe 340 leading out of the case 10. That is, the condensed water supplied from the condensate receiver 31 is transferred 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 outflow container 323, a material for applying an appropriate treatment to acidic condensate may be disposed.

In the spill container 323, the drain valve 343 or the safety valve 342 is connected through a drain line (3431 in FIG. 3) and a safety line (3421 in FIG. 3), respectively, and a drain opening 3233 and a safety opening. (3234) may be formed. The drain valve 343 is formed to be opened and closed to discharge the heating water accommodated in the hollow 210 to be discharged to move the oil boiler 1 or perform maintenance, cleaning, etc., and the hollow 210 ) is a valve connected to the lower side of The safety valve 342 is a valve to relieve pressure when the pressure of the heating water accommodated in the hollow 210 rises excessively, and is formed to be opened and closed to discharge heating water to reduce the pressure in the hollow 210 . The safety valve 342 may maintain a closed state and automatically open when the pressure of the heating water in the hollow 210 reaches a predetermined pressure.

The drain valve 343 and the safety valve 342 maintain a closed state so that the heating water accommodated in the hollow 210 is not discharged from the hollow 210, and then open automatically when the user opens the valve or satisfies a predetermined condition. and the heating water 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 outflow container 323 of the condensate trap, the heating water is not directly discharged to the outside from each valve, but the outflow container 323 ) was delivered to. Therefore, compared to the case where each valve and trap each have a pipe leading to the outside of the case 10 to discharge water to the outside, in the case of one embodiment of the present invention, the final discharge of discharging water to the outside of the case 10 Since there is only one pipe 340, insulation treatment and wall drilling work to be performed for each pipe are reduced, and 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 a flue connection adapter 333 and a flue 53 of an oil boiler 1 according to an embodiment of the present invention.

Further referring 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. Accordingly, 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, which can be coupled to the oil boiler 1 of the present invention, is provided to surround the inner pipes 5311 and 5321 from the outside 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 diameters of the outer pipes 5312 and 5322 are greater than the diameters of the inner pipes 5311 and 5321, and the inner pipes 5311 and 5321 and the outer pipes 5312 and 5322 may form concentric circles on 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 interspace.

In addition, the flue 53 may include a tubular straight pipe 532 formed by extending straight, and may include an elbow 531 in which directions in which the inlet and outlet are directed 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 may be placed.

The flue connection adapter 333 may have a double pipe structure including an internal adapter 3331 and an external adapter 3332 to be connected to the flue 53 of the 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 outer adapter may have a larger diameter than the inner adapter, and the inner and outer adapters may form concentric circles on a horizontal plane. The external adapter 3332 may be provided to surround the internal adapter 3331 on the outside of the internal adapter 3331 . Accordingly, a second interspace may be formed between the external adapter 3332 and the internal adapter 3331 .

A tubular internal adapter 3331 is formed so that the inner pipes 5311 and 5321 communicate with 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 a straight pipe 532 may be connected.

When the flue 53 is coupled to the flue connection adapter 333, the second space between the inner surface of the external adapter 3332 and the outer surface of the inner adapter 3331, and the outer pipes 5312 and 5322 The first space between the inner surface and the outer surface of the inner pipe (5311, 5321) may communicate with each other. Accordingly, external air transferred 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 unit, and may provide external air reached to the air supply pipe unit through the air supply adapter 3333. With this structure, there is no need to provide a structure for supplying air from the outside separately from the flue 53. In addition, even if the flue enters from any direction as shown in FIGS. 16A to 16D and is connected to the flue connection adapter 333, air supply to the air supply unit is always possible at a certain position in the case 10, providing air It does not affect the flow rate.

The air supply adapter 3333 included in the flue connection adapter 333 protrudes outward from the external adapter 3332 in the radial direction. The external adapter 3332 and the internal adapter 3331 open upward to communicate with the elbow 531 of the flue 53 in the vertical direction, and open downward to communicate with the duct horizontal portion 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 external adapter 3332 and the outer surface of the internal adapter 3331 may communicate with the inside of the air supply adapter 3333 . A corrugated pipe 52 connected to the inlet 511 of the air supply pipe may be connected to the air supply adapter 3333 in communication therewith.

The flue 53 may be inserted into the flue connecting adapter 333 and coupled with the flue connecting adapter 333 . When the outer diameters of the inner pipes 5311 and 5321 are smaller than the inner diameter of the inner adapter 3331, the inner pipes 5311 and 5321 may be inserted into the inner adapter 3331. Likewise, the outer diameters of the outer pipes 5312 and 5322 may be smaller than 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 connecting adapter 333, if inserted too deeply, the external pipes 5312 and 5322 may block the inlet of the air supply adapter 3333 communicating with the external adapter 3332. Therefore, as the stopper 3334 protrudes radially inward from the inner surface of the inner adapter 3331, while the inner pipes 5311 and 5321 are inserted downward (D), they are caught by the stopper 3334 and no longer downward ( In D), a state in which the flue 53 cannot be inserted can be maintained. That is, when the flue 53 is inserted into and coupled to the flue connecting adapter 333, the stopper 3334 suppresses the movement of the inner pipes 5311 and 5321 below a predetermined point, thereby forming the external adapter 3332. Blocking of the outer pipes 5312 and 5322 is prevented.

The height of the stopper 3334 is such that, when the inner pipes 5311 and 5321 come into contact with 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 is It can be any height that does not block. A plurality of stoppers 3334 may be arranged spaced apart from each other along an inner surface of the inner adapter 3331 . In a horizontal plane, the outer diameters of the inner pipes 5311 and 5321 may be smaller than 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 showing 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 predetermined safety distance or more. The safety gap is a predetermined distance larger than the outer diameter of the pipes 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 .

Flue insertion holes 111 , 1211 , 1231 , and 1241 may be formed in the upper wall 11 and the side walls 12 constituting the case 10 . The flue insertion holes 111, 1211, 1231, and 1241 are openings formed so that the flue 53 can pass therethrough. When the case 10 has four side walls 12, flue insertion holes 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, the flue insertion holes 111, 1211, 1231, and 1241 are formed on the upper wall 11, the first side wall 121, the third side wall 123, and the fourth side wall 124, respectively. However, positions where the flue insertion holes 111, 1211, 1231, and 1241 are formed are not limited thereto.

When the flue 53 is inserted through the flue insertion holes 1211, 1231, and 1241 opened in the side wall 12, the flue 53 is coupled to the flue connecting adapter 333 and the elbow 531 and the elbow 531 It may include a straight pipe 532 leading to the flue insertion ports 111, 1211, 1231, and 1241 of the corresponding side wall 12 along the horizontal direction. When the flue 53 is inserted through the flue insertion hole 111 opened on the upper wall 11, the flue 53 includes the straight pipe 532, and the straight pipe 532 is directly coupled to the flue connection adapter 333. It 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 on the third sidewall 123, the flue insertion hole formed on the first sidewall 121 ( 1211, a situation in which the flue 53b including the straight pipe 532b and the elbow 531b is inserted into the flue insertion hole 1241 formed in the fourth side wall 124 is shown in FIG. A situation in which the flue 53c including a ) is inserted is shown in FIG. 16C, and a situation in which the flue 53 including a straight pipe 532d is inserted into the flue insertion hole 111 formed on the upper wall 11 is shown in FIG. 16D. . In each figure, the walls other than the second side wall 122 constituting the case 10 are shown with broken lines so that the connection state between the flue 52 and the flue connection adapter 333 can be more easily grasped.

The elbow 531 connected to the flue connection adapter 333 can be connected to any one of the plurality of flue insertion holes 1211 , 1231 , and 1241 formed on the side wall 12 through the straight pipe 532 . In this state, as the elbow 531 maintains engagement with the flue connection adapter 333 and rotates, it can be connected to another one of the flue insertion ports 1211, 1231, and 1241 through the straight pipe 532. Can be placed.

For example, as shown 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 insertion hole 1231 formed in the third side wall 123 through the straight pipe 532a.

In this state, the elbow 531a may be rotated while maintaining the coupling with the flue connection adapter 333, and the elbow 531b may be disposed so as to face the first sidewall 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.

In this way, 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 it is rotated, the flue 53 can be inserted into the flue insertion ports 1211, 1231, and 1241 formed on each side wall 12. Therefore, even if there is a restriction on 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, the flue connection adapter 333 does not move or rotate, so the air supply adapter 3333 is a position where the corrugated pipe 52 of the air supply pipe unit is connected to the duct 33 position does not change. Therefore, it is possible to prevent the deformation of the air supply unit, and stable air supply to the air supply unit 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 the burner housing 46 of the oil boiler 1 according to an embodiment of the present invention. Referring to FIGS. 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 generates a measurement signal by receiving ultraviolet rays generated from a flame located in the combustion chamber 22 . The flame acquisition unit 43 may be electrically connected to the processor 152 to transfer the generated measurement signal to be used for calculation. Since it is possible to determine the presence or absence of a flame in the internal space 220 by the flame acquisition unit 43, it is possible to determine whether a combustion reaction is occurring.

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 must be able to check the flame generated in the internal space 220 of the combustion chamber 22 . Therefore, the flame acquisition unit 43 is disposed at a position where the internal space 220 of the combustion chamber 22 can be seen through the flame monitoring hole 4241, which is an opening formed in the burner fixing plate 424. In one embodiment of the present invention, the flame monitoring hole 4241 is formed by opening in the vertical direction, and the flame acquisition unit 43 is inserted into the sensor hole 4630 formed in the vertical direction, so that the sensor hole 4630 is formed in the 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 4243 of the burner fixing plate 424 may include a first surface exposed to the inner space 220 and a second surface opposite to the first surface. A flame monitoring hole 4241 is formed by penetrating from the first surface toward the second surface. The flame acquisition unit 43 may be installed spaced upward from the second surface.

The sensor hole 4630 is surrounded and defined by a sensor hole forming part 463 that is a part of the burner housing 46 . The sensor hole 4630 may communicate with the outside so that the flame check unit 43 can be inserted from the outside. Specifically, the burner housing 460 may have a housing upper wall 466 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. A sensor hole 4630 may be defined in an empty space inside the sensor hole forming unit 463 .

The sensor hole formation part 463 may include a cooling hole 4631 that is partially open and communicates the sensor hole 4630 and the burner space 460 . The cooling hole 4631 allows air to flow in so that the sensor hole formation part 463 and the flame acquisition part 43 can be air-cooled. The cooling hole 4631 may be opened while looking at the fuel nozzle 421 .

The sensor hole 4630 is centered around the fuel nozzle 421 so that combustion gas or air in the combustion chamber 22 flows backward through the sensor hole 4630 to minimize the influence on the burner space 460 and the blower 44. It can be placed 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 into 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 acquisition unit 43 inserted into the sensor hole 4630 is spaced upward from the upper end of the cooling hole 4631 and may be positioned above the cooling hole 4631 .

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 pipe 4242 disposed thereon. 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 device through the cooling hole 4631 . That is, the flame monitoring tube 4242 may surround the flame monitoring hole 4241 and protrude toward the sensor hole 4630 from the second surface. As the flame monitoring tube 4242 is disposed, less nitrogen oxides may be generated compared to the case where it is not.

The cross-sectional area of the flame monitoring hole 4241 on 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 greater than the upper limit, too much air flows through the flame monitoring hole 4241, which makes the recycling of combustion gas unfavorable and the 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 be impossible to observe the flame of the flame acquisition unit 43 through the flame monitoring hole 4241 .

The upper part of the flame guard 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 of the flame guard tube 4242 in the vertical direction. can This is to reduce the degree of heat transferred upward from the combustion chamber 22 through the flame monitoring tube 4242 to the flame acquisition unit 43 through the sensor hole forming unit 463.

An upper end of the flame monitoring tube 4242 may be placed at the same height as the sensor hole forming part 463 in a vertical direction. The upper end of the flame monitoring pipe 4242 may not be positioned lower than the lower end of the sensor hole forming part 463 . If the upper end of the flame monitoring pipe 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 combustion gas and reducing nitrogen oxides. because the incidence may increase.

In addition, the upper part of the flame monitoring tube 4242 is inserted into the sensor hole 4630, but may be formed spaced apart from the inner surface of the sensor hole forming part 463 to the inside 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 unit 463 and the flame monitoring tube 4242 are formed in a cylindrical shape, the inner diameter of the sensor hole forming unit 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. ), it is possible to reduce the amount of nitrogen oxides generated by generating a blue flame from oil-type fuel.

In addition, as described above, the oil boiler 1 has a combustion chamber 22, a burner 42, a blower 44, an air supply pipe 51 having a total length longer than the length of a straight line connecting the inlet and outlet, and Including the heat exchanger, the overall height of the 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, burner 42, blower 44, air supply pipe 51, corrugated pipe 52 and flue 53 are connected in communication. Including the duct 33 having a 333, the heat exchanger and the case 10, the flue 53 may have various installation directions, and the air supply pipe 51 regardless of the installation direction of the flue 53 The position where air is supplied through the corrugated pipe 52 is fixed, so that the flow rate of supplied air 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, so that it can be easily assembled, and when heated It is possible to provide a flame tube in which corrosion or breakage does not occur. 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 is installed in the combustion chamber 22, the sensor hole 4630, the flame confirmation unit 43, the internal space 220 and the sensor at a position spaced apart from the flame confirmation unit 43 By including a burner 42 having a flame monitoring hole 4241 communicating the hole 4630 and a heat exchanger, the amount of heat transferred to the flame acquisition unit 43 is reduced, and the flame acquisition unit 43 operates smoothly. You can check the condition of the flame.

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

In the above, even though all components constituting the embodiment of the present invention have been described as being combined or operated as one, 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 components may be selectively combined with one or more to operate. In addition, terms such as "comprise", "comprise" or "having" described above mean that the corresponding component may be present unless otherwise stated, and thus exclude other components. It should be construed 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 to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed 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 : fixed bracket
21: outer tube
22: combustion chamber
23: Association
24: diaphragm
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 department
48: ignition transformer
51: air supply
52: corrugated pipe
53, 53a, 53b, 53c, 53d: year
111, 1211, 1231, 1241: flue insertion hole
121: first sidewall
122: second sidewall
123: third sidewall
124: fourth sidewall
151: control panel
152: processor
210: hollow
211: external cylinder entrance
212: outer cylinder exit
213: outer cylinder extension
214: temperature acquisition unit
220: internal space of the combustion chamber
221: inner side
222: inner bottom
261: plate part
262: penetration
263: protrusion
264: hanging part
271: blocking plate
272: guide wall
273: guide leg
311: receiving part
312: separation unit
320: condensate inlet
321: buoyancy body trap
322: U-shaped trap
323: outflow container
331: duct straight part
332: duct horizontal part
333: year connection adapter
334: duct support
340: final discharge piping
341: condensate piping
342: safety valve
343: drain valve
411: lower flame tube
412: upper flame tube
413: recirculation hall
414: tube projection
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 unit
451: fuel pump
452: fuel pump drive motor
453: coupling part
455: fuel pump case
460: burner space
461: cover packing
462: cover contact
463: sensor hole forming unit
464: blowing pipe
465: trans fixing part
466: housing upper wall
511: inlet of air supply pipe
512: flange part
513: connection part
514: straight part
515: adapter unit
517: orifice plate
531, 531a, 531b, 531c: elbow
532, 532a, 532b, 532c, 532d: intuition
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: seating part
3221: first outflow space
3222: second outflow 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: catch hole
4241: Flame monitoring hall
4242: Flame Warden
4243: fixed plate part
4244: circumference
4411: inlet of impeller
4440: damper opening
4441: damper replacement
4442: flap
4443: O-ring
4511: shaft member of fuel pump
4512: fuel supply pipe
4521: drive shaft of fuel pump drive motor
4551: heat dissipation hole
4561: fuel pipe
4562: recovery pipe
4630: sensor hole
4631: cooling hole
5110: entrance of air supply pipe
5120: exit of air supply pipe
5121: pressure relief hole
5161: first differential pressure measurement sphere
5162: second differential pressure measurement sphere
5311, 5321: inner pipe
5312, 5322: outer piping
D: down

Claims (9)

a combustion chamber providing an internal space in which a combustion reaction takes place;
A burner comprising a fuel nozzle for spraying oil-type fuel into the inner space of the combustion chamber, an air nozzle for spraying air into the inner space, and a spark plug for igniting a mixture of the sprayed fuel and the sprayed air. ;
a blower for forcing air into the air nozzle;
an air supply pipe connected to the blower to guide the air to the blower from the outside of the blower; and
A heat exchanger for heating heating water by heat derived from the combustion reaction;
In the inner space, a flame tube defining a tube space and having an open lower end by surrounding a partial space in which a mixture of sprayed oil-type fuel and sprayed air is ignited, and combustion gas in the inner space is formed in the flame tube Further comprising a flame tube portion having a recirculation hole formed through the flame tube so as to flow from the outside to the inside,
The flame tube includes an upper 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 located below the first tube portion, and the first tube And a lower flame tube having a truncated cone-shaped connecting tube connecting the second tube portion and the second tube portion,
The recirculation hole is formed in the body of the upper flame tube,
The first tube portion coupled to the upper flame tube at a lower side than the recirculation hole, the oil boiler. According to claim 1,
The recirculation hole is formed in the shape of a long hole extending along the circumferential direction of the upper flame tube, the oil boiler. According to claim 1,
The recirculation hole is provided in plurality and disposed spaced apart from each other along the circumferential direction of the upper flame tube. According to claim 1,
The total length of the air supply pipe is longer than the length of a straight line connecting the inlet of the air supply pipe through which the air is introduced and the outlet of the air supply pipe connected to the blower. According to claim 1,
The upper flame tube has an upper coupling portion, and the lower flame tube has a lower coupling portion provided to be coupled to the upper coupling portion,
The lower coupling portion of the lower flame tube to be coupled to the upper coupling portion of the upper flame tube includes a tube protrusion formed by protruding outward in a radial direction from the first tube portion. According to claim 5,
The lower flame tube further includes a lower hole that penetrates the first tube portion in a radial direction and is formed upward from the tube protrusion to an upper end of the first tube portion. According to claim 1,
The upper flame tube has an upper coupling portion, and the lower flame tube has a lower coupling portion provided to be coupled to the upper coupling portion,
The upper coupling portion includes a tube hole formed through the upper flame tube so that the lower coupling portion can be inserted. According to claim 7,
The upper flame tube is formed in a cylindrical shape,
The tube hole,
a vertical hole portion penetrating the upper flame tube in a radial direction and formed up to a first distance upward from a lower end of the upper flame tube; and
An oil boiler comprising a horizontal hole portion that penetrates the upper flame tube in a radial direction and is formed along a circumferential direction of the upper flame tube from an upper end of the vertical hole portion. According to claim 8,
The tube hole,
Penetrating the upper flame tube in a radial direction, further comprising a holding hole formed downward from an end to which the vertical hole is not connected among both ends of the horizontal hole with respect to the circumferential direction to a second distance shorter than the first distance To do, the oil boiler.

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