KR20220096016A - Burner and water heating apparatus includine same - Google Patents

Abstract

A burner according to the present invention comprises: a fuel providing unit which has a fuel nozzle disposed to spray fuel for a combustion reaction along a reference direction which is a predetermined direction into a combustion space; an air providing unit disposed to supply air for the combustion reaction; an ignition unit disposed to generate a spark such that the provided fuel and air may be ignited; a flame holder provided with a plate-shaped holder plate, a central opening formed at the center of the holder plate such that the fuel sprayed by the fuel providing unit may reach the combustion space, a plurality of eddy openings which are radially formed around the central opening such that the air provided by the air providing unit may be moved to the combustion space to form an eddy in order to produce a flame along with the fuel, and a plurality of eddy wings which protrude to a direction opposite to the reference direction from the circumference of the plurality of eddy openings; and a blower tube having an inner space which surrounds the fuel nozzle and the ignition unit along with the flame holder, and is connected to the air providing unit such that the air pumped by the air providing unit may flow, and a discharge opening which is an opening opened towards the combustion space. Therefore, a stable combustion may be realized.

Description

BURNER AND WATER HEATING APPARATUS INCLUDINE SAME

The present invention relates to a burner and a water heater comprising the same.

A water heater is a device that heats a fluid in a container to heat a desired area, or forms hot water using heated water and provides it to a consumer. Therefore, in order to heat water, a water heater generates a flame and combustion gas by causing a combustion reaction using a burner, and generally has a structure capable of heating water using heat transmitted from the flame and heat transmitted from the combustion gas.

A burner needs fuel to initiate a combustion reaction. As the fuel, liquefied petroleum gas or liquefied natural gas, which are a kind of fossil fuel, may be used, but oil-type diesel or kerosene may be used.

When designing a water heater using a burner that generates less nitrogen oxide using oil-type fuel, a method of supplying air together with fuel at high speed to generate a blue flame may be required. However, when the air and fuel supplied at high speed meet and ignite, a lifting phenomenon may occur in which the flame is not accurately positioned where it should be. In this case, ignition may not be smooth, and incomplete combustion may occur, which may increase the generation of nitrogen oxides. In addition, when incomplete combustion occurs, there is a high possibility that a yellow flame is formed by soot, and passages inside the boiler provided to allow the combustion gas to flow in a predetermined path may be blocked.

The present invention has been devised to solve these problems, and it generates a blue flame easily, but increases the settling rate of the flame when ignited to reduce lifting and realizes stable combustion to reduce nitrogen oxide generation and a burner including the same To provide a water heater.

A burner according to an embodiment of the present invention includes: a fuel supply unit having a fuel nozzle provided to spray fuel for a combustion reaction into a combustion space along a reference direction, which is a predetermined direction; an air supply unit provided to blow air for the combustion reaction; an ignition unit provided to cause a spark to ignite provided fuel and air; A plate-shaped holder plate, a central opening formed in the center of the holder plate so that the fuel sprayed by the fuel supply unit reaches the combustion space, and the air supplied by the air supply unit moves to the combustion space and a vortex A plurality of vortex openings formed radially around the central opening to form a flame together with the fuel, and a plurality of vortex blades projecting from the circumference of the plurality of vortex openings in the opposite direction to the reference direction flame holder; and an internal space that surrounds the fuel nozzle and the ignition unit together with the flame holder, is connected to the air supply unit, through which the air compressed by the air supply unit flows, and an exhaust opening that is an opening open toward the combustion space. The branch includes a blower tube.

A burner according to an embodiment of the present invention includes a fuel supply unit provided to spray oil-type fuel into a combustion space; an air supply unit provided to provide air to the combustion space; and an ignition unit provided to ignite a mixture of the sprayed fuel and the injected air. a flame holder having a plate-shaped holder plate, a central opening formed in the center of the holder plate, and a plurality of vortex openings formed radially around the central opening; a blower tube that surrounds the fuel supply unit and the ignition unit together with the flame holder, is connected to the air supply unit, and has an exhaust opening that is an opening open toward the combustion space; and a tube frame coupled to the blower tube and the flame holder so that the relative position of the flame holder with respect to the blower tube is fixed.

A water heater according to an embodiment of the present invention includes: a combustion chamber providing a combustion space that is a space in which a combustion reaction occurs; a plurality of tubes connected to the combustion chamber so that the combustion gas flows through the interior to heat water flowing from the outside using the combustion gas generated by the combustion reaction; and a burner provided to cause the combustion reaction, wherein the burner includes: a fuel supply unit provided to spray oil-type fuel into the combustion space; an air supply unit provided to provide air to the combustion space; and an ignition unit provided to ignite a mixture of the sprayed fuel and the injected air. A plate-shaped holder plate, a central opening formed in the center of the holder plate, a plurality of vortex openings formed radially around the central opening, and a plurality of vortex wings protruding from the periphery of the plurality of vortex openings a frame holder; and a blower tube that surrounds the fuel supply unit and the ignition unit together with the flame holder, is connected to the air supply unit, and has an exhaust opening that is an opening open toward the combustion space, and the outer surface of the flame holder is It is spaced apart from the inner surface of the blower tube at a predetermined distance.

Accordingly, while a blue flame is easily formed in the burner of the water heater, the flame is stably settled when ignited to reduce flame lifting, and stable combustion is possible, thereby reducing the generation of nitrogen oxides.

1 is a conceptual diagram of an internal structure of a water heater according to an embodiment of the present invention.
2 is a perspective view showing the internal structure of the water heater according to an embodiment of the present invention.
3 is a perspective view illustrating a burner of a water heater according to an embodiment of the present invention.
4 is a perspective view showing a state in which the flame forming part is separated from the burner of the water heater according to an embodiment of the present invention.
5 is a perspective view showing the internal structure of the flame forming part of the water heater according to an embodiment of the present invention.
6 is a perspective view illustrating a situation in which the blower tube is disassembled from the flame forming part of the water heater according to an embodiment of the present invention.
7 is a longitudinal cross-sectional view of a flame forming part of a water heater according to an embodiment of the present invention.
8 is a perspective view illustrating a flame holder, an ignition unit, a fuel nozzle, and a flame forming cover of a water heater according to an embodiment of the present invention.
9 is a bottom view of a flame forming part of a water heater according to an embodiment of the present invention.
10 is a perspective view illustrating a flameholder of a water heater according to an embodiment of the present invention.
11 is an exploded perspective view illustrating parts related to an air supply unit in a burner of a water heater according to an embodiment of the present invention.
12 is an exploded perspective view of an air supply unit of a water heater according to an embodiment of the present invention.

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

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

1 is a conceptual diagram of the internal structure of a water heater 1 according to an embodiment of the present invention. 2 is a perspective view showing the internal structure of the water heater 1 according to an embodiment of the present invention.

Referring to FIGS. 1 and 2 , the water heater 1 is a device for heating water through heat exchange between combustion gas and water generated therefrom after generating heat. The water heater 1 comprises a combustion chamber 30 , a burner 20 , a flue 40 and a processor P. The water heater 1 may include a case 10 , an enclosure 60 , and a buffalo plate 50 . The case 10 may be formed in a cylindrical shape, but the shape is not limited thereto. The water heater 1 may be an oil boiler using oil type fuel.

A combustion chamber 30 providing a combustion space 300, which is a space in which a combustion reaction occurs, may be provided inside the case 10 containing other components, and the burner 20 is disposed in the combustion space 300 The combustion reaction can produce heat and combustion gases. The combustion chamber 30 may be provided on the lower side of the case 10 , but the position thereof is not limited thereto.

The combustion chamber 30 may communicate with one end of the pipe 40 . A hollow 70 disposed outside the combustion chamber 30 and the tube 40 to allow water to flow around the combustion chamber 30 and the tube 40 may be formed in the case 10 . While the combustion gas generated in the combustion chamber 30 is discharged to the other end of the tube 40 through the tube 40, water flowing in the hollow 70 around the tube 40 and the combustion chamber 30 is discharged from the combustion gas. It can be heated and discharged by receiving heat.

The pipe 40 may extend along the vertical direction of FIG. 1 , and water may flow therethrough. A buffalo plate 50 may be disposed inside the tube 40 . The buffalo plate 50 is disposed so that the path through which the combustion gas flowing in the pipe 40 flows can be determined.

The pipe 40 is a component in which the combustion gas is provided to flow therein, and a plurality of water heaters may be disposed as shown. A buffalo plate 50 is inserted in the tube 40 . One end of the pipe 40 may communicate with the combustion chamber 30 . The pipe 40 may be arranged such that the other end of the pipe 40 crosses the hollow 70 to discharge the combustion gas to the outside. One end of the tube 40 may be a lower end located at the lower side, and the other end may be an upper end located at the upper side.

The burner 20 is provided to cause a combustion reaction from air and fuel. The fuel used by the burner 20 of the water heater 1 may be an oil type. The end of the burner 20 to which fuel is injected is located in the combustion chamber 30 , so that a combustion reaction may occur in the combustion space 300 of the combustion chamber 30 .

The enclosure 60 is a component that houses the internal structures of the water heater 1 described in FIG. 1 . The enclosure 60 may have a rectangular parallelepiped shape as shown, but the shape is not limited thereto. A processor P may be installed in the enclosure 60 .

The processor P is a component including an element capable of performing a logical operation for performing a control command, and may include a central processing unit (CPU) or the like. The processor P may be connected to various components to transmit a signal according to a control command to each component, and may receive information obtained by being connected to various sensors or acquisition units in the form of signals. Therefore, in one embodiment of the present invention, the processor (P) may be electrically connected to the air supply unit 22, the ignition unit 24, the fuel nozzle 23, etc. included in the water heater (1). Since the processor (P) may be electrically connected to each of the components, it may be connected with a conducting wire or may further have a communication module capable of wireless communication to communicate with each other.

The water heater 1 may further include a storage medium, so that the control commands performed by the processor P are stored in the storage medium and utilized. The storage medium may be a device such as a hard disk drive (HDD), a solid state drive (SSD), a server, a volatile medium, a non-volatile medium, and the like, but the type is not limited thereto. In addition to this, the storage medium may further store data necessary for the processor P to perform a task.

3 is a perspective view showing the burner 20 of the water heater 1 according to an embodiment of the present invention.

The burner 20 is a component that causes a combustion reaction, and may be provided to form a blue flame. The burner 20 includes a fuel nozzle 23 , an ignition unit 24 , and an air supply unit 22 . The burner 20 may further include a housing 21 , a flame holder 25 , a tube frame 28 , a blower tube 26 , and a fuel pump 27 .

The housing 21 surrounds the components of the burner 20 or is coupled to the case 10 after being combined with each component to fix the relative positions of the components of the burner 20 with respect to the case 10 . to be. The housing 21 is coupled to the combustion chamber cover 211 and the combustion chamber cover 211 that are coupled to the case 10 to cover the opening of the combustion chamber 30 and the flame forming part is coupled to the air supply unit 22 and the flame forming unit. It may include a flame-forming cover 212 that covers it. In addition, the combustion chamber cover 211 may be provided with a blower coupling part 213 provided so that the air supply part 22 is coupled from the outside of the case 10 may be formed.

The fuel pump 27 is a device for pressurizing fuel provided from the outside or stored in a separate fuel tank to the fuel nozzle 23 through the fuel supply pipe 273 . Accordingly, the fuel pump 27 generates and provides power to be driven by the fuel pressure forming unit 271 including a device capable of pressurizing fuel, and by electric power, the fuel pressure forming unit 271 being driven. It may include a fuel motor 272 that does.

4 is a perspective view showing a state in which the flame forming part is separated from the burner 20 of the water heater 1 according to an embodiment of the present invention. 5 is a perspective view showing the internal structure of the flame forming part of the water heater 1 according to an embodiment of the present invention to be revealed. 6 is a perspective view illustrating a situation in which the blower tube 26 is disassembled from the flame forming part of the water heater 1 according to an embodiment of the present invention. 7 is a longitudinal cross-sectional view of the flame forming part of the water heater 1 according to an embodiment of the present invention. 8 is a perspective view showing the flame holder 25, the ignition unit 24, the fuel nozzle 23 and the flame forming cover 212 of the water heater 1 according to an embodiment of the present invention. 9 is a bottom view of the flame forming part of the water heater 1 according to an embodiment of the present invention.

The flame forming unit may include a flame holder 25 , a tube frame 28 , a blower tube 26 , a fuel nozzle 23 , and an ignition unit 24 . In the flame forming part, fuel and air are mixed to generate a flame so that the flame is disposed in the combustion space 300 of the combustion chamber 30 .

Flame forming part - fuel nozzle (23)

The fuel supply unit is a component that provides fuel for the combustion reaction, and may include a fuel nozzle 23 and a fuel pump 27 . The fuel nozzle 23 is a component that sprays oil-type fuel into the combustion space 300 . Therefore, the fuel nozzle 23 is connected to the fuel pump 27 through the fuel supply pipe 273, and can receive oil-type fuel from the fuel pump 27, and the fuel pump 27 pressurizes the fuel. The fuel is sprayed into the combustion space 300 by pressure. Let the direction in which the fuel nozzle 23 sprays fuel into the combustion space 300 be a reference direction (D). The reference direction D may be one direction transverse to the vertical direction, the direction in which the burner 20 is inserted into the case 10 , and the direction in which the fuel nozzle 23 extends.

The flow rate at which the fuel nozzle 23 sprays fuel may be determined by the fuel pump 27 . The fuel nozzle 23 may be disposed through the flame forming cover 212 . The inner end 231 of the nozzle, which is the end of the fuel nozzle 23 on the reference direction (D) side and where the outlet through which the fuel is injected is formed, may be located inside the combustion chamber 30 as shown, and in the reference direction ( While extending from the columnar nozzle body 232 passing through the housing 21 along D), the cross-sectional area in a cross-section cut in a plane perpendicular to the reference direction D may be reduced.

Flame forming part - ignition part (24)

The ignition unit 24 is a component that ignites a mixed material in which the atomized fuel and the injected air are mixed. In an embodiment of the present invention, the ignition unit 24 is described as an ignition plug-in, but a device that ignites in a manner other than the spark plug may be used as the ignition unit 24 . The igniter 24 may generate an electric spark to ignite the mixed material. As the oil-type fuel is sprayed and air is sprayed and mixed in the flame forming unit and the combustion space 300 to form a mixed material, an electric spark is generated, thereby forming a flame.

The plug body 242 passes through the housing 21 in the reference direction D, and an end opposite to the reference direction D of the ignition unit 24 may be electrically connected to the processor P or a power source. The plug inner end 241 that is the end of the ignition unit 24 on the reference direction (D) side may be disposed adjacent to the nozzle inner end 231 inside the combustion chamber 30 . The fuel nozzle 23 may be disposed at the center of the blower tube 26 when viewed along the reference direction D, and the ignition unit 24 may be disposed around the fuel nozzle 23 . The plug inner end 241 may be inclined in a direction approaching the nozzle inner end 231 from the plug body 242 in the reference direction D. A spark may be formed at the inner end 241 of the plug.

Flame forming part - blower tube (26)

The blower tube 26 surrounds a portion of the fuel nozzle 23 inserted into the combustion chamber 30 and the ignition unit 24 and is connected to the air supply unit 22 . The blower tube 26 may have an internal space through which the air pressurized by the air supply unit 22 flows, and an exhaust opening that is an opening open toward the combustion space 300 . Accordingly, the fuel sprayed by the fuel nozzle 23 and the air compressed by the air supply unit 22 may be discharged to the combustion space 300 through the discharge opening, and sparks may form to form a flame. The discharge opening may be at least partially covered by the flameholder 25 .

The blower tube 26 may include a straight tube portion 262 having a cylindrical appearance and having an end opposite to the reference direction D coupled to the housing 21 . The blower tube 26 is a tapered portion ( 261) may be included. That is, the tapered portion 261 may correspond to the tube end region, which is a region adjacent to the end of the blower tube 26 in the reference direction (D). A flame holder 25 may be disposed on the inside of the tapered portion 261 . A tube frame 28 is disposed inside the straight pipe part 262 , and the tube frame 28 may be coupled to the inner surface of the straight pipe part 262 .

The inner surface of the tapered portion 261 of the blower tube 26 and the outer surface of the flame holder 25 may be spaced apart from each other at a predetermined distance. That is, the blower tube 26 and the flame holder 25 may not contact each other, and the flame holder 25 may not completely cover the discharge opening. The predetermined interval may be 0.8 mm or more and 1.8 mm or less, but may vary depending on the amount of heat generated by the burner 20 or other characteristics. When looking at the blower tube 26 and the flame holder 25 along the reference direction (D), the discharge opening and the flame holder 25 may form a concentric circle.

Flame Forming Part - Tube Frame (28)

The tube frame 28 is a component arranged to fix the relative position of the components within the flame forming section. The tube frame 28 is connected to the tube connection part 281 coupled to the inner surface of the straight pipe part 262 of the blower tube 26, and the tube connection part 281, and the holder connection part 282 is coupled to the flame holder 25. ) may be included. Therefore, the tube frame 28 is spaced apart from the blower tube 26 and the flame holder 25 without contacting each other, and when viewed along the reference direction (D), a relative positional relationship that can draw concentric circles can be maintained. .

The tube connecting portion 281 may be formed in a disk shape so as to be coupled to and in contact with the inner surface of the straight tube portion 262 . An opening is formed in the center of the tube connection part 281 so that the fuel nozzle 23 can be inserted and fixed. The holder connection portion 282 may be formed in a shape such as a pillar so as to protrude from the tube connection portion 281 along the reference direction (D) and be coupled to the flame holder 25, and stably the flame holder 25. A plurality may be disposed to support it. The end of the holder connection part 282 in the reference direction (D) is inserted into the coupling hole 256 formed in the flame holder 25 , or is coupled with the fastener inserted into the coupling hole 256 and coupled with the flame holder 25 . can be

Since the tube frame 28 is for maintaining the relative positional relationship between the blower tube 26 and the flame holder 25, it may include a plurality of holes formed to reduce the weight. The ignition part 24 may pass through one of these holes.

In the case of an exemplary burner, the flameholder and the blower tube may be coupled via a plurality of components to maintain a relative position with each other. Therefore, in the exemplary burner, the flame holder and the blower tube were able to have a difference in relative position by the accumulated tolerance according to the coupling relationship of the components between the flame holder and the blower tube. The flame forming part of the burner 20 according to an embodiment of the present invention arranges a tube frame 28 that directly connects the blower tube 26 and the flame holder 25 to the inside of the blower tube 26, so that the blower The relative position of the tube 26 and the flame holder 25 can be maintained uniformly without being affected by the coupling relationship of other components.

Flame Forming Part - Flame Holder (25)

10 is a perspective view showing the flame holder 25 of the water heater (1) according to an embodiment of the present invention.

The flame holder 25 is a component disposed for smooth flame formation. The flame holder 25 may include a holder plate 251 and a holder circumference 252 . The flame holder 25 may further include a central opening 253 , a vortex opening 254 , a coupling hole 256 , and a vortex blade 255 formed in the holder plate 251 .

The holder plate 251 is formed in a plate shape and is a component arranged to at least partially cover the discharge opening formed in the blower tube 26 . In one embodiment of the present invention, the holder plate 251 is illustrated as being formed in a circular plate shape orthogonal to the reference direction (D), but the shape is not limited thereto.

The holder circumference 252 is a portion extending from the circumference of the holder plate 251 in the reference direction D, and in an embodiment of the present invention, since the holder plate 251 is formed in a disk shape, the holder plate 251 ) may have a ring shape protruding in the reference direction (D) along the circumference. However, the shape of the holder peripheral portion 252 is not limited thereto.

The reference direction (D) side end of the holder circumferential portion 252 may be disposed at a position spaced apart from the reference direction (D) side end of the blower tube 26 by a predetermined distance along the opposite direction to the reference direction (D). . The above-described predetermined interval may be 2.3 times or more and 3.6 times or less of the distance from the fuel nozzle 23 to the holder plate 251 along the reference direction D.

The flame holder 25 is a tube frame 28, the outer surface of the holder peripheral portion 252 is the inner surface of the tapered portion 261 corresponding to the tube end region of the blower tube 26 and a predetermined distance spaced apart It may be disposed at positions spaced apart from each other with a gap W1. The tube frame 28 is the flame holder 25 and the blower tube ( 26) can be fixed. Accordingly, an annular peripheral opening having a thickness as much as the spacing W1 can be formed between the outer surface of the holder peripheral portion 252 and the inner surface of the blower tube 26 . In Fig. 10, the area corresponding to the peripheral opening is designated as A3.

The central opening 253 is an opening formed in the center of the holder plate 251 so that the fuel sprayed by the fuel nozzle 23 reaches the combustion space 300 . Air may be discharged through the central opening 253 . The central opening 253 may be formed in a circular shape, but may be formed in an incomplete circular shape in which a portion of the periphery is linearly formed as shown. The central opening 253 may include a circular area and a protruding area. The circular region is a portion formed in a circular shape and connected to the plurality of vortex openings 254 . The protruding region is a portion protruding from a portion of the circumference of the circular region to the outside of the radius of the circular region. An end of the ignition part 23 on the reference direction (D) side may be positioned adjacent to the protruding area. However, the shape of the central opening 253 is not limited thereto. In FIG. 10 , the area corresponding to the central opening 253 is referred to as A1.

The vortex opening 254 is another opening formed in the holder plate 251, and may be formed in plurality. The vortex opening 254 may be radially formed around the central opening 253 . In one embodiment of the present invention, the four vortex openings 254 are described based on the drawings shown as being arranged to form an equal angle of 90 degrees, but the number and arrangement are not limited thereto. As the vortex opening 254 is formed, the air provided to the blower tube 26 by the air supply unit 22 moves to the combustion space 300 to form a vortex to form a flame together with the fuel. In Fig. 10, the area corresponding to the vortex opening 254 is referred to as A2.

The vortex blade 255 is a portion disposed on the holder plate 251 adjacent to the vortex opening 254 . The vortex blades 255 may have a number corresponding to the number of the vortex blades 255 . The vortex blades 255 may be disposed to guide the air so that the air discharged through the vortex opening 254 rotates in the same direction, protruding from the circumference of the vortex opening 254 .

The vortex blade 255 may protrude from the circumference of the vortex opening 254 to the outside of the combustion space 300 , that is, in the opposite direction to the reference direction (D). The vortex blade 255 may be formed to be inclined in one direction with respect to the direction opposite to the reference direction (D). Specifically, when the flame holder 25 is viewed along the reference direction D, the perimeter of each of the vortex openings 254 is a clockwise edge and a counterclockwise edge extending radially from the central opening 253 . can have The plurality of vortex blades 255 protrude from the corners in a common direction among the clockwise corners or counterclockwise corners of the plurality of vortex openings 254, counterclockwise with respect to the direction opposite to the reference direction (D). It may have a shape inclined in a direction or a clockwise direction. Therefore, when the flame holder 25 is viewed along the reference direction D, the vortex wings 255 may cover at least a portion of the vortex opening 254 . In one embodiment of the present invention shown in the drawings, the plurality of vortex openings 254 protrude from the clockwise side corners, and have a shape inclined counterclockwise with respect to the direction opposite to the reference direction (D).

The angle θ formed between the vortex blades 255 and the holder plate 251 may be 20 degrees or more and 45 degrees or less, and preferably 30 degrees. When θ has an angle smaller than 20 degrees, an excessively strong vortex is formed, and the amount of air increases and ignition performance may be deteriorated. On the other hand, when θ has an angle greater than 45 degrees, the vortex is very weakly formed, and the amount of air becomes thin, and ignition performance may be deteriorated. Therefore, the vortex blade 255 can be formed so that an appropriate air and fuel ratio can be formed.

Due to the shape of the vortex blade 255 and the vortex opening 254 described above, the air discharged from the internal space of the blower tube 26 through the flame holder 25 is whirled along the shape of the vortex blade 255 . It can form a vortex and better create a mixed material with the atomized fuel. Accordingly, the flame is smoothly formed, and the occurrence of a lifting phenomenon in which the flame is separated from the flame holder 25 can be reduced.

A coupling hole 256 is formed in the holder plate 251 to be coupled to the holder connection portion 282 of the tube frame 28 described above. The coupling holes 256 may be formed in plurality, and the flame holder 25 may be supported in a balanced manner, and may be arranged at equal intervals and at an angle to each other based on the center of the holder plate 251 .

When air and fuel are respectively provided by the air supply unit 22 and the fuel supply unit, the flow rate of the gas passing through the central opening 253, the flow rate of the gas passing through the plurality of vortex openings 254, and the circumference Let the sum of the flow rates of gas passing through the opening be the total flow rate. A value obtained by dividing the flow rate of gas passing through the central opening 253 by the total flow rate may be 0.285 or more and 0.395 or less. A value obtained by dividing the flow rate of gas passing through the plurality of vortex openings 254 by the total flow rate may be 0.131 or more and 0.181 or less. The value obtained by dividing the flow rate of gas passing through the peripheral opening by the total flow rate may be 0.424 or more and 0.584 or less. A central opening 253, a plurality of vortex openings 254, a circumferential opening and a plurality of vortex blades 255 may be formed so that this flow distribution can be made, and the blower tube 26 and the flame holder 25 are It can be fixed through the tube frame (28).

The plurality of vortex openings 254 may be formed to have an area larger than an area of the central opening 253 and an area of the peripheral opening. When the sum of the area of the plurality of vortex openings 254, the area of the central opening 253, and the area of the peripheral opening is the total opening area, the value obtained by dividing the area of the central opening 253 by the total opening area is 0.235 It may be more than 0.287 or less.

An exemplary water heater having a central opening having a larger area than that of the central opening 253 of the water heater 1 according to an embodiment of the present invention is conceivable. Due to the difference in the area of the central opening 253 , fuel and air are discharged faster in the water heater 1 according to an embodiment of the present invention than in the exemplary water heater, thereby making it easier to generate a blue flame. However, the risk of occurrence of a lifting phenomenon may increase accordingly. In the water heater 1 according to an embodiment of the present invention, the angle between the vortex blade 255 and the holder plate 251 is formed as described above, so that a strong vortex By forming a blue flame can be stably formed. In addition, the flow rate passing through the central opening 253, the vortex opening 254 and the peripheral opening is distributed as described above, so that a blue flame can be stably formed.

Air supply unit (22)

11 is an exploded perspective view illustrating parts related to the air supply unit 22 in the burner 20 of the water heater 1 according to an embodiment of the present invention. 12 is an exploded perspective view of the air supply unit 22 of the water heater 1 according to an embodiment of the present invention.

The air supply unit 22 is a device for pressurizing air supplied from the outside to the combustion space 300 . Therefore, the air providing unit 22 may be a blower. The air supply unit 22 generates a rotational driving force for rotating the impeller 224 and the impeller 224 for compressing air and delivering it to the blower tube 26, and a blower motor 223 for transferring it to the impeller 224. ) may be included. The air supply unit 22 includes an impeller cover 222 that can cover the impeller 224 built in the blower coupling unit 213 and a motor cover 221 that covers the blower motor 223 seated on the impeller cover 222 . ) may be included.

The motor cover 221 may be formed to accommodate the blower motor 223 therein. The motor cover 221 may be coupled and fixed to the housing 21 while the blower motor 223 is embedded therein. The motor cover 221 may include a motor built-in part 2211 in which the blower motor 223 is built, and an air inlet part 2212 which is a passage through which air is introduced from the outside. Air may be introduced into the motor built-in part 2211 from the outside through the air inlet 2212 , and the introduced air may be delivered to the impeller 224 to be pressurized to the blower tube 26 .

The blower motor 223 may include a stator 2232 , a shaft 2234 , a rotor 2233 , and a motor frame. A stator 2232 and a rotor 2233 are disposed in the motor frame, and the motor frame is coupled to the impeller cover 222 to fix the blower motor 223 with respect to other components. The stator 2232 is formed in an annular shape and may be formed in a shape in which a conductive coil is wound a plurality of times. The rotor 2233 is inserted into an opening formed open along the reference direction D at the center of the stator 2232 , and may be formed of a conductive material. When power is applied to the blower motor 223 , the rotor 2233 may rotate in the axial direction in the reference direction D by electromagnetic interaction between the stator 2232 and the rotor 2233 .

A shaft 2234 extending along the reference direction D is inserted into the center of the rotor 2233 . The shaft 2234 may be coupled to the power transmission unit 2242 of the impeller 224 to be described later, and may transmit the rotation of the rotor 2233 to the impeller 224 . That is, the impeller 224 may also rotate in the reference direction (D) in the axial direction.

The impeller cover 222 may be formed in an annular plate shape. The impeller cover 222 may be coupled to the housing 21 while covering the impeller 224 built in the blower coupling part 213 . A blower motor 223 may be coupled to an upper surface of the impeller cover 222 , and a motor cover 221 may be coupled to the impeller cover 222 . Air introduced through the motor cover 221 may be delivered to the center of the impeller 224 through a hole formed in the center of the impeller cover 222 . The shaft 2234 may be coupled to the power transmission unit 2242 of the impeller 224 through a hole formed in the center of the impeller cover 222 .

The impeller 224 compresses and blows the introduced air by rotating. Therefore, the impeller 224 may have a special shape, and may be formed in such a way that a plurality of spiral blades are disposed spaced apart from each other on the outer surface of the body formed in a gentle cone or truncated cone shape. However, the shape of the impeller 224 is not limited thereto.

The inlet of the impeller 224 is a region corresponding to the vertex of the cone or the upper surface of the truncated cone. That is, an annular hole formed between the power transmission unit 2242 formed in the center of the impeller 224 and the shroud 2241 according to an embodiment of the present invention may act as an inlet of the impeller 224 . Air introduced through the inlet of the impeller 224 is transmitted to the outlet of the impeller 224 formed in the radial direction of the impeller 224 through the space between the blades and the blades according to the rotation of the impeller 224, and compressed can be released from the state. The impeller 224 may further include a shroud 2241 covering the wings. An air passage communicating the blower coupling part 213 and the blower tube 26 may be formed in the housing 21 . The outlet of the impeller 224 blows compressed air into this air passage.

The air supply unit 22 may be controlled so that the air is sent under pressure to the blower tube 26 at a plurality of different wind speeds. The processor P may control the air providing unit 22 so that the air providing unit 22 operates in a low stage or a high stage. The processor P may control the blower motor 223 to operate in a low stage or a high stage by providing currents of different magnitudes to the blower motor 223 . At a low stage, the processor P may provide a predetermined low stage current to the blower motor 223 , and at a high stage, the processor P may provide a higher stage current greater than the low stage current to the blower motor 223 . The processor (P) may control the air supply unit 22 to operate in a low stage at the time of ignition and in a high stage after ignition.

The low stage means a state in which the blower motor 223 rotates at a low stage speed so as to provide air at a low stage wind speed that is a predetermined wind speed. The low stage speed may be determined according to the low stage air ratio of the burner 20 or the amount of heat generated. The high stage means a state in which the blower motor 223 rotates at a high stage speed greater than the low stage speed to provide air at a high stage wind speed greater than the low stage wind speed. Here, the low speed may be 20% to 60% of the high speed. For example, the low speed may be 1400 rpm or more and 2600 rpm or less, and the high speed may be 3000 rpm or more and 3400 rpm or less. As described above, the air supply unit 22 is controlled differently at the time of ignition and after ignition to prevent the lifting of the flame that may occur due to the wind speed of the excessively strong air during ignition, but to obtain a high amount of heat after ignition. It can provide air with strong wind speed.

In the above, even though it has been described that all components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, 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 one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

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

1: water heater
10: case
20: burner
21: housing
22 : blower
23: fuel nozzle
24 : spark plug
25: flame holder
26: blower tube
27: fuel pump
28: tube frame
30: combustion chamber
40 : association
50: buffalo plate
60: enclosure
70: hollow
211 combustion chamber cover
212: flame forming cover
213: blower coupling part
221: motor cover
222: impeller cover
223: blower motor
224: impeller
231: nozzle inner end
232: nozzle body
241: plug inner end
242: plug body
251: holder plate
252: holder circumference
253: central opening
254: vortex opening
255: vortex wing
256: coupling hole
261: taper part
262: straight pipe
271: fuel pressure forming part
272: fuel motor
273: fuel supply pipe
281: tube connection part
282: holder connection part
300: combustion space
2211: Motor built-in part
2212: air inlet
2231: motor frame
2232 : Stator
2233: rotor
2234: shaft
2241 : Shroud
2242: power transmission unit
2243: impeller exit
D: reference direction
P: processor

Claims (14)

a fuel supply unit having a fuel nozzle provided to spray fuel for a combustion reaction in a combustion space along a reference direction, which is a predetermined direction;
an air supply unit provided to blow air for the combustion reaction;
an ignition unit provided to cause a spark to ignite provided fuel and air;
A plate-shaped holder plate, a central opening formed in the center of the holder plate so that the fuel sprayed by the fuel supply unit reaches the combustion space, and the air supplied by the air supply unit moves to the combustion space and a vortex A plurality of vortex openings radially formed around the central opening to form a flame together with the fuel, and a plurality of vortex blades projecting from the circumference of the plurality of vortex openings in the opposite direction to the reference direction flame holder; and
It surrounds the fuel nozzle and the ignition unit together with the flame holder, and is connected to the air supply unit and has an internal space through which the air pumped by the air supply unit flows, and an exhaust opening which is an opening open toward the combustion space. A burner comprising a blower tube. According to claim 1,
The flame holder is disposed at a position spaced apart from the inner surface of the blower tube at a predetermined distance from the inner surface of the blower tube to cover the discharge opening, and annular between the outer surface and the inner surface of the blower tube. A burner that forms a perimeter opening. 3. The method of claim 2,
When the air and the fuel are respectively provided by the air supply unit and the fuel supply unit, the flow rate of the gas passing through the central opening, the flow rate of the gas passing through the plurality of vortex openings, and the peripheral opening When the sum of the flow rates of gases passing through is called the total flow rate,
The value obtained by dividing the flow rate of gas passing through the central opening by the total flow rate is 0.285 or more and 0.395 or less, and the value obtained by dividing the flow rate of gas passing through the plurality of vortex openings by the total flow rate is 0.131 or more and 0.181 or less, The central opening, the plurality of vortex openings, the peripheral opening and the plurality of vortex blades are formed so that a value obtained by dividing the flow rate of gas passing through the peripheral opening by the total flow rate is 0.424 or more and 0.584 or less. 3. The method of claim 2,
An area of the plurality of vortex openings is larger than an area of the central opening and an area of the peripheral opening. 3. The method of claim 2,
Let the sum of the area of the plurality of vortex openings, the area of the central opening, and the area of the peripheral opening be the total opening area,
A value obtained by dividing the area of the central opening by the total opening area is 0.235 or more and 0.287 or less. 3. The method of claim 2,
When looking at the blower tube and the flame holder along the reference direction, the discharge opening and the flame holder form a concentric circle, the burner. 3. The method of claim 2,
The tube end region adjacent to the reference direction end of the blower tube has a shape in which the cross-sectional area cut in a plane perpendicular to the reference direction decreases as it goes along the reference direction,
The smallest distance among the distances between the outer surface of the flame holder and the inner surface of the tube end region is the same as the spaced distance, the burner. 3. The method of claim 2,
The burner further comprising a tube frame disposed in the inner space of the blower tube, coupled to the blower tube, and a reference direction end is coupled to the flame holder. According to claim 1,
The plurality of vortex blades are arranged to guide the air so that the air discharged through the plurality of vortex openings rotates in the same direction, the burner. According to claim 1,
When the flame holder is viewed along the reference direction, the circumference of each of the plurality of vortex openings has a clockwise edge and a counterclockwise edge extending radially from the central opening,
The plurality of vortex blades are protruded from the corners in a common direction among the clockwise corners or the counterclockwise corners, and are inclined in a counterclockwise or clockwise direction with respect to the opposite direction of the reference direction. Eggplant, burner. According to claim 1,
The angle formed between the vortex blade and the holder plate is 20 degrees or more and 45 degrees or less, the burner. According to claim 1,
The central opening includes a circular region formed in a circular shape and connected to the plurality of vortex openings, and a protruding region protruding from a portion of the circumference of the circular region to the outside of the radius of the circular region,
and an end of the ignition part in the reference direction is positioned adjacent to the protruding area. a fuel supply unit provided to spray oil-type fuel into the combustion space;
an air supply unit provided to provide air to the combustion space; and
an ignition unit provided to ignite a mixture of the atomized fuel and the injected air;
a flame holder having a plate-shaped holder plate, a central opening formed in the center of the holder plate, and a plurality of vortex openings formed radially around the central opening;
a blower tube that surrounds the fuel supply unit and the ignition unit together with the flame holder, is connected to the air supply unit, and has an exhaust opening that is an opening open toward the combustion space; and
A burner comprising a tube frame coupled to the blower tube and the flame holder so that the relative position of the flame holder with respect to the blower tube is fixed. a combustion chamber providing a combustion space that is a space in which a combustion reaction occurs;
a plurality of tubes connected to the combustion chamber so that the combustion gas flows through the interior to heat water flowing from the outside using the combustion gas generated by the combustion reaction; and
A burner provided to cause the combustion reaction,
The burner is
a fuel supply unit provided to spray oil-type fuel into the combustion space;
an air supply unit provided to provide air to the combustion space; and
an ignition unit provided to ignite a mixture of the atomized fuel and the injected air;
A plate-shaped holder plate, a central opening formed in the center of the holder plate, a plurality of vortex openings formed radially around the central opening, and a plurality of vortex wings protruding from the periphery of the plurality of vortex openings a frame holder; and
and a blower tube that surrounds the fuel supply unit and the ignition unit together with the flame holder, is connected to the air supply unit, and has an exhaust opening that is an opening open toward the combustion space,
The outer surface of the flame holder is spaced apart from the inner surface of the blower tube at a predetermined distance, a water heater.

Images