KR102369557B1 - Burner and water heating device using the same - Google Patents

Abstract

Water heater according to the present invention, a burner causing a combustion reaction; a combustion chamber positioned on the downstream side of the burner with respect to a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an inner surface surrounding an inner space in which the flame generated by the combustion reaction is located; and a heat exchanger configured to heat water to provide heating or to generate hot water by using heat generated by the combustion reaction, wherein the burner includes: and a combustion region that is a region in which a combustion reaction occurs, wherein the combustion region has a profile convexly formed along the reference direction in one cross-section extending in a direction perpendicular to the one cross-section, and is perpendicular to the one cross-section When one direction is referred to as a longitudinal direction and a direction orthogonal to the reference direction and the longitudinal direction is referred to as a width direction, the combustion region is at least one of two outermost points located on the outermost side with respect to the width direction. The drawn normal is provided so as not to contact the inner surface of the combustion chamber.

Description

Burner and water heater using same {BURNER AND WATER HEATING DEVICE USING THE SAME}

The present invention relates to a burner causing a combustion reaction and a water heater using the same to heat water.

A water heater is a device that heats water. The type of water heater may include a boiler for heating a desired area by heating water in a container, and a water heater for discharging the heated water. Accordingly, in order to heat the heating water of the boiler, the boiler generally has a burner. In a condensing boiler that comprehensively uses the heat of combustion gas, sensible heat generated from the burner is provided to heating water, and the sensible heat of the combustion gas generated from the burner and latent heat due to the phase change of the combustion gas are provided to the heating water to heat the heating water. do.

The heat generated by the burner is used to heat the water, but in the process, it transfers excessive heat to other components that make up the water heater, which may deform or break the other components, preventing them from performing their functions.

The present invention has been devised to solve such problems, and it is to provide a water heater and a burner having a structure in which the inner surface of the combustion chamber can be less affected by the combustion reaction.

A water heater according to an embodiment of the present invention includes: a burner causing a combustion reaction; a combustion chamber positioned on the downstream side of the burner with respect to a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an inner surface surrounding an inner space in which the flame generated by the combustion reaction is located; a heat insulator provided on the inner surface of the combustion chamber to insulate the combustion chamber; and a heat exchanger including a heat exchange pipe through which the water flows along the inside to heat water to provide heating or to generate hot water by using the heat generated by the combustion reaction, wherein the burner is configured in the reference direction and a combustion region that is a region in which the combustion reaction occurs among regions of a surface located on the most downstream side as a reference, wherein the combustion region has a profile convexly formed along the reference direction in one cross-section perpendicular to the one cross-section It is formed extending in the direction, and the direction perpendicular to the one cross section is referred to as the longitudinal direction, and the direction perpendicular to the reference direction and the longitudinal direction is referred to as the width direction. Covers the inner surface facing the inside of the combustion chamber with respect to the direction, and the combustion region is such that the normal line drawn at at least one of the two outermost points located on the outermost side with respect to the width direction does not contact the heat insulating material will be prepared

Water heater according to another embodiment of the present invention, a burner causing a combustion reaction; a combustion chamber positioned on the downstream side of the burner with respect to a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an inner surface surrounding an inner space in which the flame generated by the combustion reaction is located; a heat insulator provided on the inner surface of the combustion chamber to insulate the combustion chamber; and a heat exchanger including a heat exchange pipe through which the water flows along the inside to heat water to provide heating or to generate hot water by using the heat generated by the combustion reaction, wherein the burner is configured in the reference direction and a combustion region, which is a region in which the combustion reaction occurs among regions of a surface located at the most downstream side as a reference, wherein the heat insulating material has an inner surface facing the inside of the combustion chamber in a horizontal direction among the inner surfaces of the combustion chamber and the combustion region is provided so that a normal line drawn at an arbitrary point in the combustion region does not contact the heat insulating material.

Water heater according to another embodiment of the present invention, a burner for causing a combustion reaction; a combustion chamber positioned on the downstream side of the burner with respect to a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an internal space provided to allow the combustion gas to flow; and a heat exchanger configured to heat water to provide heating or to generate hot water by using heat generated by the combustion reaction, wherein the burner includes: It has a combustion region that is a region in which a combustion reaction occurs, and in a cross-section in which the burner is cut in a plane perpendicular to the longitudinal direction orthogonal to the reference direction, the profile of the combustion region has an arc shape having a first radius of curvature A first profile, a second profile having an arc shape having a second radius of curvature, and a third profile having an arc shape having a third radius of curvature, wherein the first profile and the third profile are the reference The first profile and the third profile are respectively located at the outermost side with respect to the width direction orthogonal to the direction and the longitudinal direction, and the sum of the widths of the first profile and the third profile is smaller than the width of the second profile, The combustion region is provided so that a normal line drawn at an arbitrary point of the second profile does not contact the inner surface of the combustion chamber.

According to an embodiment of the present invention, a burner for a water heater located upstream of a combustion chamber based on a reference direction that is a flow direction of combustion gas generated by a combustion reaction includes a burner mat for causing the combustion reaction, The burner mat includes a combustion region that is a region in which the combustion reaction occurs among regions of the burner mat, wherein the combustion region has a profile convexly formed along the reference direction in one cross-section perpendicular to the one cross-section. a first profile having an arc shape having a first radius of curvature, and a second profile having an arc shape having a second radius of curvature; When a third profile having an arc shape having a radius of curvature is included, a direction perpendicular to the one cross section is referred to as a longitudinal direction, and a direction perpendicular to the reference direction and the longitudinal direction is referred to as a width direction, the first The profile and the third profile are respectively located at the outermost sides in the width direction, and the sum of the widths of the first profile and the third profile in the width direction is formed smaller than the width of the second profile, , The second radius of curvature is greater than the first radius of curvature and the third radius of curvature, and the combustion region is provided so that a normal drawn at an arbitrary point of the second profile does not contact the inner surface of the combustion chamber. do.

Accordingly, it is possible to prevent the side plate or the insulator of the combustion chamber from being damaged by overheating.

1 is a longitudinal sectional view showing the shape of a combustion chamber, a mixing chamber, and a portion to which a burner is coupled of an exemplary water heater.
2 is a perspective view of a water heater according to a first embodiment of the present invention.
3 is a part of a longitudinal cross-sectional view of a water heater according to a first embodiment of the present invention.
4 is a longitudinal cross-sectional view of a burner according to a first embodiment of the present invention.
5 is a perspective view of a burner according to a first embodiment of the present invention.
6 is a longitudinal sectional view of a burner and a portion of a combustion chamber according to a first embodiment of the present invention;
7 is a longitudinal cross-sectional view of a burner according to a second embodiment of the present invention.
8 is a longitudinal cross-sectional view of a burner according to a third 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 longitudinal sectional view showing the shape of a portion where a combustion chamber and a burner 100 of an exemplary water heater are coupled.

Referring to the drawing, in a state where the burner mat 101 of the burner 100 of the exemplary water heater is fixed by the burner frame 102, a point located at the boundary between the burner mat 101 and the burner frame 102 ( 103), it can be seen that the normal line 106 drawn in contact with the inner surface 104 of the combustion chamber at a point 105. As the exemplary burner 100 is formed with this structure, the flame generated from the burner 100 may contact the inner surface 104 of the combustion chamber. When a heat insulator is disposed on the inner surface 104 of the combustion chamber, the flame may contact the heat insulator. Therefore, the side plate of the combustion chamber may be discolored or damaged by receiving too much heat. Also, the amount of heat to be used to heat the water may be used to heat the side plate of the combustion chamber, so that the efficiency of the water heater 1 may be impaired.

first embodiment

2 is a perspective view of a water heater 1 according to a first embodiment of the present invention. 3 is a part of a longitudinal sectional view of a water heater 1 according to a first embodiment of the present invention.

Referring to the drawings, the water heater 1 according to the first embodiment of the present invention includes a burner 20 , a combustion chamber 30 and a heat exchanger 40 . In the embodiments of the present invention, the water heater 1 will be described with a focus on the boiler.

Combustion chamber (30)

The combustion chamber 30 is a component located on the downstream side of the burner 20 based on the reference direction D1, which is the flow direction of the combustion gas generated by the combustion reaction. The combustion chamber 30 may have an inner surface surrounding the inner space 33 in which the flame generated by the combustion reaction is located, and the combustion gas may flow through the inner space 33 of the combustion chamber 30 . there is.

The side plate 31 of the combustion chamber 30 surrounds the inner space 33, and is extended along the reference direction D1 so that the inner space 33 has the form of an open space along the reference direction D1. can Accordingly, the burner 20 and the mixing chamber 10 may be disposed on the upstream side of the open inner space 33 based on the reference direction D1, and the heat exchanger 40 may be disposed on the downstream side.

In at least a partial region of the inner side of the side plate 31 of the combustion chamber 30 , a heat insulating material 32 for insulating the combustion chamber 30 may be provided. The heat insulating material 32 is made of a material that blocks heat flow, and can reduce the amount of heat generated by the combustion reaction transferred to the outer region of the combustion chamber 30 through the inner surface of the combustion chamber 30 . As an example of the insulator 32 , a porous polystyrene panel that reduces heat flow or a needle mat made of inorganic silica may be used, but the type of the insulator 32 is not limited thereto.

Mix Chamber (10)

A premix burner 20 may be used in the water heater 1 according to the first embodiment of the present invention. The premix type burner 20 is a device for generating combustion gas by injecting air and fuel, mixing them in a predetermined ratio, and burning the mixed air and fuel using the heat emitted. For this action, the water heater 1 according to the first embodiment of the present invention may include a mixing chamber 10 which is a space for receiving fuel and air and mixing them in a predetermined ratio to prepare a mixture for combustion reaction. can The mixing chamber 10 having such a structure is provided to obtain optimum fuel efficiency and thermal efficiency by heating the air and fuel mixed in a ratio suitable for the combustion reaction to cause a combustion reaction.

In order to supply air to the mixing chamber 10 and to blow combustion gas generated from the burner 20 to be described later in the reference direction D1, the water heater 1 of the present invention further includes a pump capable of pumping air It may further include a blower that may include.

A chamber frame may be formed around the chamber opening, which is an opening formed in the center of the mixing chamber 10 . Since the burner frame 21 is coupled to the chamber frame, the mixing chamber 10 and the burner 20 may be coupled to each other. A fastener inserted into the fastening hole of the burner frame 21 may be inserted and fastened into the fastening hole formed in the chamber frame.

A burner contact surface contacting the burner 20 may be formed on a side surface of the chamber frame facing the burner 20 . A packing groove 13 may be formed on the burner contact surface. The packing groove 13 may be formed by digging concavely. An inner packing 71 may be inserted into the packing groove 13 . The packing groove 13 may be formed in an annular shape surrounding the chamber opening.

The outer part 15 of the mixing chamber located outside the burner contact surface may be coupled to the combustion chamber 30 . The combustion chamber 30 may be contacted and coupled to the outside of the burner contact surface among the sides of the chamber frame facing the burner 20 . Therefore, the combustion chamber 30 does not directly contact the burner 20, and after the burner 20 and the mix chamber 10 are combined, the combustion chamber 30 is combined with the mix chamber 10 to form a boiler. .

The outer part 15 of the mixing chamber and the outer part 311 of the combustion chamber may be coupled to each other through another fastener. Accordingly, a fastening hole into which a fastener can be inserted and fastened may be formed in the outer part 15 of the mixing chamber and the outer part 311 of the combustion chamber. The outermost end of the outer part 15 of the mix chamber can be bent in the reference direction D1 so that the airtightness of the boundary between the mix chamber 10 and the combustion chamber 30 is better maintained and well coupled to each other. there is.

Heat Exchanger(40)

The heat exchanger 40 is a component that heats water to provide heating or to generate hot water by using the heat generated by the combustion reaction. Heat accompanying the flame generated by the combustion reaction is provided to the heat exchanger 40 , and combustion gas generated by the combustion reaction is provided to the heat exchanger 40 to heat water.

Based on the reference direction D1, the heat exchanger 40 may be disposed downstream of the combustion chamber 30 . Accordingly, the water heater 1 may be formed by being assembled in the order of the mixing chamber 10 , the burner 20 , the combustion chamber 30 , and the heat exchanger 40 along the reference direction D1 .

The heat exchanger 40 may include at least one of a sensible heat exchanger and a latent heat exchanger. The sensible heat heat exchange unit is a type of heat exchange unit that receives sensible heat generated by the burner 20 causing a combustion reaction by convection of radiant heat and combustion gas, and heats water flowing therein. The latent heat heat exchange unit is a type of heat exchange unit that heats water by transferring latent heat generated by condensation of combustion gas to water.

The heat exchanger 40 may have a heat exchange pipe (not shown) through which water flows. The heat exchange pipe is heated by being exposed to the flame and combustion gas of the burner 20, and the heat is transferred to water flowing through the inside, so that the water can be heated.

When the combustion gas is condensed and condensed water is generated, the condensed water may fall and be discharged to the condensate receiver located on the downstream side of the heat exchanger 40 with respect to the reference direction D1, and the combustion gas is subjected to special treatment through the duct It can be discharged after passing through.

The water heater 1 according to an embodiment of the present invention includes a heat exchanger 40 and a combustion chamber 30 coupled to each other without fasteners passing through the heat exchanger packing. As the first coupling part 34 provided in the combustion chamber 30 and the second coupling part 41 provided in the heat exchanger 40 are coupled to each other, the airtight between the heat exchanger 40 and the combustion chamber 30 . this can be maintained. The first coupling part 34 may be located on the downstream side of the combustion chamber 30 with respect to the reference direction D1 , and the second coupling part 41 may be located on the upstream side of the heat exchanger 40 .

Any one of the first coupling part 34 and the second coupling part 41 is a coupling locking part formed in an annular shape, and the other one is a coupling coupled to the coupling hooking part by holding it while surrounding the coupling locking part as it is bent. It could be a step. In one embodiment of the present invention, the first coupling part 34 provided in the combustion chamber 30 is a coupling locking part, and the second coupling part 41 formed in the heat exchanger 40 is a coupling locking part. Therefore, although the description will be focused on this situation, the first coupling part 34 may be a coupling locking part and the second coupling part 41 may be a coupling locking part.

The engaging locking portion is formed to protrude from the side wall 31 of the combustion chamber 30 . The direction in which the engaging locking part protrudes may be a direction perpendicular to the sidewall 31 of the combustion chamber 30 . The coupling locking portion may include a coupling base 342 and a plurality of coupling protrusions 341 formed in plurality, and these coupling protrusions 341 protrude from the coupling base 342 and may be disposed to be spaced apart from each other. The direction in which the coupling protrusion 341 protrudes may be a direction transverse to the direction in which the coupling base 342 protrudes from the sidewall 31, and in one embodiment of the present invention, the direction is the reference direction D1.

By folding the engaging protrusion 341, the engaging portion is pressed. Accordingly, the engaging portion protruding outwardly from the upper region of the heat exchanger 40 may be interposed between the engaging protrusion 341 and the engaging base 342 to be coupled to the engaging engaging portion. In one embodiment of the present invention, the coupling protrusion 341 included in the first coupling part 34 is folded inward to press the coupling engaging part which is the second coupling part 41 .

The water heater 1 according to an embodiment of the present invention is a combustion chamber 30 at the boundary between the combustion chamber 30 and the heat exchanger 40 so that airtightness is maintained at the boundary between the combustion chamber 30 and the heat exchanger 40 . And it may further include a heat exchanger packing each in contact with the heat exchanger (40). The heat exchanger packing may be positioned between the coupling engaging portion and the coupling base 342 to block combustion gas that may leak at the boundary between the heat exchanger 40 and the combustion chamber 30 . On the other hand, since there is no fastener for forming a through hole in the heat exchanger packing, the heat exchanger packing according to an embodiment of the present invention may not be easily damaged even when high temperature heat is applied. That is, the heat exchanger packing may have improved durability. Due to this, the combustion gas and heat may be blocked from escaping to the outside at the boundary between the combustion chamber 30 and the heat exchanger 40 .

Burner(20)

4 is a longitudinal cross-sectional view of the burner 20 according to the first embodiment of the present invention. 5 is a perspective view of a burner 20 according to a first embodiment of the present invention. 6 is a longitudinal sectional view of the burner 20 and a portion of the combustion chamber 30 according to the first embodiment of the present invention.

The burner 20 will be described with reference to FIGS. 4 to 6 as in FIG. 3 . The burner 20 is a component causing a combustion reaction.

The burner 20 may include a burner mat 22 and a burner frame 21 , and may include a distribution plate 23 and an ignition unit (not shown). The distribution plate 23 is a plate-shaped component in which a plurality of fine holes are formed, and the burner mat 22 is a plate-shaped element in which metal fibers are tightly woven.

The distribution plate 23 may be positioned on the upstream side of the burner mat 22 with respect to the reference direction D1, and the distribution plate 23 and the burner mat 22 may be coupled by spot welding. Accordingly, the burner mat 22 facing the combustion chamber 30 and the distribution plate 23 facing the opposite direction may be disposed. The mixture passes through the holes formed in the distribution plate 23 , and the mixture passing through the holes reaches the heated metal fibers of the burner mat 22 , and may be ignited by heat transfer.

A side of the burner frame 21 facing the mixing chamber 10 is a chamber contact surface 2131 and may contact the mixing chamber 10 . The chamber contact surface 2131 covers the inner packing 13 to be described later, and may be coupled to the mixing chamber 10 . The side of the burner frame 21 located on the opposite side is the burner packing contact surface 2132 , and the outer packing 72 to be described later may contact it.

The burner frame 21 may be coupled to the mixing chamber 10 . As the burner frame 21 is coupled to the mixing chamber 10, a boundary between the burner frame 21 and the mixing chamber 10 is formed. It can block the mixture from escaping.

In order to couple the burner frame 21 with the mixing chamber 10, fasteners may be used. A fastener is inserted through a fastening hole formed in the burner frame, and the inserted fastener is coupled to a fastening hole formed in the mixing chamber 10 , so that the burner frame may be coupled to the mix chamber. A plurality of such fastening holes may be disposed along the circumferential direction of the burner frame. The arrangement of the fastening holes may be determined to correspond to the positions of the fastening holes formed in the mixing chamber 10 .

The inner packing 71 is a component in contact with the mixing chamber 10 and the burner 20 at the boundary between the mixing chamber 10 and the burner 20 so that the airtightness of the boundary is maintained. The inner packing 71 may be made of graphite that is not easily deformed or damaged even at high temperatures, but the material thereof is not limited thereto. Therefore, compared to the case of sealing the boundary between the burner 20 and the mix chamber 10 using a ceramic packing that has internal voids and is vulnerable to high temperatures, the internal packing 71 made of graphite is adopted to prevent leakage of raw gas and , the inner packing 71 may have high durability even at high temperatures.

Since the inner packing 71 can be inserted into the packing groove 13 formed on the burner contact surface of the mixing chamber 10, it can be formed in a rectangular annular shape to correspond to the shape of the packing groove 13, but the shape is The shape of the packing groove 13 is not limited thereto.

The inner packing 71 has a packing insertion portion inserted into the packing groove 13 and a width greater than the width of the packing groove 13, so that the packing engaging portion that comes into contact with the area adjacent to the packing groove 13 among the burner contact surfaces is may include Therefore, instead of the entire inner packing 71 being inserted into the packing groove 13, the packing insertion part is inserted into the packing groove 13, and the inner packing 71 is formed to be stepped so that the packing locking part is in contact with the burner contact surface. can Therefore, the coupling between the mixing chamber 10 and the inner packing 71 is not ended simply by inserting the packing insert into the packing groove 13, but rather the packing engaging part comes into contact with the burner contact surface, so the inner packing 71 and The interface formed by the mixing chamber 10 may not be formed as a simple plane. The interface formed by the inner packing 71 and the mixing chamber 10 is formed stepwise in a stepwise manner, and as one inner packing 71 is disposed while the primary contact surface and the secondary contact surface are formed, the inner packing 71 ), the airtightness of the mixing chamber 10 can be improved.

The inner packing 71 may include a plurality of packing units. The packing unit is formed in a rod shape extending in one direction, so that the entire inner packing 71 is formed in an annular shape, they are connected to each other by a fastener or an adhesive and may be arranged in a closed ring shape. Adhesive is applied to the connecting portion where the plurality of packing units are in contact with and connected to each other, and it is possible to prevent a situation in which gas leaks through a gap formed at the boundary between the packing units. The shape of the end of each packing unit is formed so that the end of each packing unit can be connected to each other so that the end of each packing unit can be fitted with each other.

The water heater 1 according to an embodiment of the present invention may further include an outer packing 72 . The outer packing 72 is, at the boundary between the outer part 15 of the mix chamber and the combustion chamber 30, the outer part 15 of the mix chamber and the combustion chamber ( 30) are each in contact with each component. The outer packing 72 may be formed of ceramic or needle mat, but the material thereof is not limited thereto.

The outer packing 72 may be formed to surround the burner mat 31 . Accordingly, the outer packing 72 may be formed in a rectangle having an opening in the center, but the shape is not limited thereto. Similarly to the inner packing 71 , the outer packing 72 may also include a plurality of units end-connected to each other, so that the plurality of units constitute the entire annular outer packing 72 .

In order to maintain airtightness at the boundary between the combustion chamber 30 and the mix chamber 10, an outer packing 72 is provided on the outer portion 15 of the mix chamber and the combustion chamber 30 at the boundary between the outer portion 15 of the mixing chamber and the combustion chamber 30. ) can be in contact with each other.

However, the outer packing 72 may be formed in the form of a closed ring surrounding the burner 20 without contacting the burner 20 . That is, the outer packing 72 may not contact the burner packing contact surface 2132 . Since the outer packing 72 does not contact the burner 20 , heat may not be transferred by direct conduction from the burner 20 . Since heat is not transferred from the burner 20 by conduction, damage to the outer packing 72 due to overheating can be prevented. Therefore, a cross-sectional area cut in a plane perpendicular to the reference direction (D) of the space surrounded by the outer packing 72 may be larger than an area projected by the burner 20 in the reference direction (D).

The outer packing 72 may overlap an outer portion of the burner frame 21 to cover an outer portion of the burner packing contact surface 2132 . By disposing the outer packing 72 in this way, even if raw gas leaks primarily between the mixing chamber 10 and the chamber contact surface 2131 , the flow can be blocked secondarily so that it does not leak into the combustion chamber 30 . In addition, the outer packing 72 covering a portion of the burner packing contact surface 2132 can prevent the combustion gas from leaking backwards between the mixing chamber 10 and the chamber contact surface 2131 .

As shown, the inner packing 71 may be disposed between the packing groove 13 and the chamber contact surface 2131, and the outer packing 72 is located at one end of the side wall 31 of the combustion chamber. It may be disposed between the outer portions 15 of the mixing chamber. Due to this packing structure, it is possible to prevent the outflow of raw gas that may occur through the boundary between the mix chamber 10 and the burner 20 by the inner packing 71, and by the outer packing 72, the combustion chamber ( 30) and the mixing chamber 10 can prevent the outflow of combustion gas that may occur. In addition, by reducing the amount of material used for the outer packing 72, it is possible to reduce the cost.

Since the adhesive is applied to the surface in which the packing units constituting the inner packing 71 and the outer packing 72 contact each other, it is possible to prevent gas leakage that may occur between the packing units. By the configuration as described above, the internal packing 71 primarily prevents leakage of raw gas that may leak from the mixing chamber 10 . The outer packing 72 is secondarily disposed in the gap between the mix chamber 10 and the combustion chamber 30 to prevent leakage of the raw gas and the combustion gas located in the combustion chamber 30 .

A combustion reaction occurs on the lower surface 221 , which is a surface located on the most downstream side of the burner mat 22 with respect to the reference direction D1 , and the flame extends. In this way, an area in which a combustion reaction occurs among the areas of the lower surface 221 of the burner mat 22 is referred to as a combustion area A1. The mixture is combusted in the combustion region A1 to generate a flame, and at another point of the burner mat 22 other than the combustion region A1, the flame is generated and does not extend to the internal space 33 of the combustion chamber 30 . The combustion area A1 may be provided so that the normal line N1 drawn at an arbitrary point in the combustion area A1 does not come into contact with the inner surface of the combustion chamber 30 . The normal line N1 drawn at an arbitrary point in the combustion region A1 may touch the upstream side of the heat exchanger 40 with respect to the reference direction D1 before contacting the inner surface of the combustion chamber 30 .

Here, the normal N1 refers to a straight line that is orthogonal to the tangent plane and passes through the one point when a virtual tangent plane is formed at a point existing in the combustion region A1 formed as a curved surface. In the case of the combustion region A1 formed by extending a predetermined shape in a plane in a direction perpendicular to the plane as in the first embodiment of the present invention, an outer point P1 that is a point of the predetermined shape in the plane A straight line perpendicular to the tangent line T1 drawn in , and passing through the one point is the normal line N1.

Since the normal line N1 drawn in the combustion area A1 does not contact the inner surface of the combustion chamber 30, the flame formed in the combustion area A1 does not touch the inner surface of the combustion chamber 30, or even if it touches, it is very weak. can only influence. Accordingly, the amount of heat transmitted to the side plate of the combustion chamber 30 among the amount of heat accompanying the flame is reduced, thereby preventing the combustion chamber 30 from being overheated.

As illustrated, the burner mat 22 may have a curved surface in which a profile formed convexly along the reference direction D1 in one cross-section extends in a direction perpendicular to the one cross-section. Let the direction perpendicular to the cross section be a longitudinal direction D3, and a direction perpendicular to both the reference direction D1 and the longitudinal direction D3 is referred to as a width direction D2.

Due to the shape of the combustion region A1, the extending direction of the normal N1 at any point in the combustion region A1 does not change along the longitudinal direction D3, but in the width direction D2. It will change as you go along. Therefore, in order to describe the direction of the normal line N1, the burner 20 and the combustion chamber 30 are cut in a plane perpendicular to the longitudinal direction D3, with reference to FIG. 6 showing a part of the one cross-section. , the positional relationship between the burner 20 and the combustion chamber 30 will be described.

The combustion region A1 may be provided so that the normal line N1 drawn at the outermost point P1 positioned on the outermost side with respect to the width direction D2 does not contact the inner surface of the combustion chamber 30 . Let θ be the magnitude of the acute angle formed by a straight line extending parallel to the reference direction D1 from the outer point P1 of the combustion region A1 and the normal line N1 at the outer point P1. Let L be the distance from the outer point P1 where the normal line N1 is formed to the inner surface of the combustion chamber 30 along the width direction D2, and the outer side where the normal line N1 is formed along the reference direction D1 Let H be the distance from the point P1 to the point 321 located at the most downstream side of the inner surface of the combustion chamber 30 . In this situation, the burner 20 may be provided so that the combustion region A1 and the inner surface of the combustion chamber 30 satisfy Equation 1 below, which is an inequality.

As described above with respect to the combustion chamber 30 , the heat insulating material 32 may be further provided on the inner surface of the combustion chamber 30 to insulate the combustion chamber 30 . When the heat insulating material 32 is disposed, the combustion region A1 may be provided such that the normal line N1 at the outer point P1 does not contact the heat insulating material 32 . That is, when the heat insulating material 32 is disposed, L is the distance from the outer point P1 where the normal line N1 is formed to the heat insulating material 32 along the width direction D2. In this situation, the burner 20 may be provided to satisfy Equation 1 above. In FIG. 6 , it is assumed that the heat insulating material 32 is disposed, and L is shown.

By the shape of the burner 20 and the location of the insulation 32 , heat accompanying the flame does not reach the insulation 32 or is transmitted in a very small amount, thereby preventing deformation and damage.

While the first embodiment was described, the angle and length relationship of the normal N1 at the outer point P1 were described, but the burner 20 to satisfy the same inequality for any point other than the outer point P1. can be provided.

The burner frame 21 surrounds the burner mat 22 and is a component serving as a skeleton of the burner 20 so that the burner mat 22 is connected to other components so that the position can be fixed. Accordingly, an opening is formed in the center of the burner frame 21 so that the burner mat 22 can be inserted and fixed. The opening may be formed in a rectangular shape so that the combustion region A1 of the burner mat 22 is exposed in the reference direction D1, but the shape is not limited thereto.

A mat fixing part 211 included in the burner frame 21 may be formed to surround the opening of the burner frame 21 . The mat fixing part 211 may be coupled to the mat peripheral part 222 , which is the remaining part except for the combustion area A1 of the burner mat 22 . The perimeter of the mat 222 may be formed to surround the combustion region A1. The mat fixing portion 211 is extended along the width direction (D2) and the length direction (D3), can be fixed to the mat peripheral portion 222 on the inside, the width direction (D2) and the length direction (D3) and the reference It may extend obliquely in the middle direction of the direction D1.

When viewed from the internal space 33 of the combustion chamber 30 in the opposite direction to the reference direction D1, the mat peripheral portion 222 is covered by the mat fixing portion 211, and the combustion region A1 is exposed. do. Therefore, the combustion region A1 is formed from the outer point P1 located at the boundary between the inner end of the mat fixing part 211 and the lower surface 221 of the burner mat 22, and the flame accompanying the combustion reaction is generated in the combustion chamber 30. It can extend to the inner space (33) of the.

The burner frame 21 may include a burner fixing part 213 on the outermost side. The burner fixing part 213 may be coupled to the mixing chamber 10 , and may be further coupled to the combustion chamber 30 . The burner fixing part 213 may be coupled to the mixing chamber 10 and the combustion chamber 30 through a fastener (not shown). As the burner fixing part 213 is coupled to the above-described components, the relative position of the burner 20 with respect to the other components of the water heater 1 may be fixed. The burner fixing part 213 may be formed to extend in the width direction D2 and the length direction D3 .

The burner fixing part 213 and the mat fixing part 211 may be connected by a connection part 212 included in the burner frame 21 . The connection part 212 has a side surface extending in the reference direction (D1) and the longitudinal direction (D3), and a side surface extending in the reference direction (D1) and the width direction (D2), the inner end of the burner fixing part 213 and the mat The outer end of the fixing part 211 may be connected.

second embodiment

7 is a longitudinal cross-sectional view of a burner 50 according to a second embodiment of the present invention.

Referring to FIG. 7 , it can be seen that the profile of the combustion region A2 of the burner 50 according to the second embodiment of the present invention includes a plurality of profiles. In the cross-section of the burner 50 cut in a plane perpendicular to the longitudinal direction D3, the profile of the combustion region A2 according to the second embodiment is a first profile (a profile in the A21 region), a second profile (A22 region) in the profile) and the third profile (profile in the area A23).

In the second embodiment of the present invention, the length of the first profile and the length of the third profile may be formed to be smaller than the length of the second profile. Specifically, according to the experimental content, the length of the first profile is preferably formed to be 1% or more and 10% or less of the length of the second profile, and the length of the third profile is also preferably configured to be the same as the first profile Do.

The first profile has the shape of an arc having a first radius of curvature. The second profile may have an arc shape having a second radius of curvature, and the second radius of curvature may be different from the first radius of curvature. The third profile has an arc shape having a third radius of curvature, and the third radius of curvature may be different from the second radius of curvature. The third radius of curvature and the first radius of curvature may be the same, but may be different from each other.

The first profile and the third profile may be respectively positioned at the outermost side with respect to the width direction D2, and the second profile may be positioned between the first profile and the third profile. In this arrangement, the combustion region A1 may be provided so that a normal line drawn at an arbitrary point of the second profile does not contact the inner surface of the combustion chamber ( 30 in FIG. 3 ). 7 shows a tangent line T3 and a normal line N3 drawn at a point P3 located on the outermost side of the second profile based on the width direction D2, and this normal line N3 is the combustion chamber (30 in FIG. 3). ) so as not to contact the inner surface of the burner 50 may be formed.

The normal line N2 drawn at the points P2 located in the first profile and the third profile may not contact the inner surface of the combustion chamber (30 in FIG. 3), but on the inner surface of the combustion chamber (30 in FIG. 3). may be contacted. 7 shows a tangent line T2 and a normal line N2 drawn at a point P2 in the first profile. Even when the normal line N2 at the point P2 can contact the inner surface of the combustion chamber (30 in FIG. 3 ), the length of the first profile is formed smaller than that of the second profile, so that the first profile Since the amount of heat generated by the combustion reaction generated in is much smaller than the amount of heat generated by the combustion reaction generated in the second profile, the degree of heating of the side plate of the combustion chamber (30 in FIG. 3 ) may be weak. The same is true for the third profile.

The mat peripheral portion 522 of the burner mat 52 according to the second embodiment is bent and coupled to the mat fixing portion 511 without forming a curve smoothly connected to the combustion region A2 in the one cross-section. can be

For points located in the second profile of the second embodiment, the burner 50 according to the second embodiment may be formed so that the relationship of Equation 1 can be established to be the same as that of the first embodiment. In addition, even when the heat insulating material (32 in FIG. 3) is disposed inside the combustion chamber (30 in FIG. 3), the burner according to the second embodiment so that the relationship of Equation 1 can be established in the same way as in the first embodiment (50) can be formed.

The lower surface 521 of the burner mat 52 according to the second embodiment may have a portion protruding from the burner frame 51 in the reference direction D1 as shown.

third embodiment

8 is a longitudinal cross-sectional view of a burner 60 according to a third embodiment of the present invention.

Referring to FIG. 8 , the combustion region A3 of the burner 60 according to the third embodiment of the present invention has a profile formed convexly along the reference direction D1 in one cross section, similar to the first embodiment. , may be formed to extend in a direction perpendicular to one cross section. The longitudinal direction D3 and the width direction D2 used in the description of the first embodiment are equally applied. Here, one cross-section is also a cross-section obtained by cutting the burner 60 in a plane perpendicular to the longitudinal direction D3.

In the combustion region A3 according to the third embodiment, a normal line drawn from at least one of the two outermost points P4 and P5 located on the outermost side with respect to the width direction D2 is a combustion chamber (30 in FIG. 3 ). It may be provided so as not to contact the inner surface of the.

The profile of the combustion region A3 in the one cross-section includes a first profile having an arc shape having a first radius of curvature (a profile in region A31) and a second profile having an arc shape having a second radius of curvature (region A32). profile) can be included. The first radius of curvature and the second radius of curvature may be the same or different from each other, and are illustrated to be different from each other in FIG. 8 .

In the third embodiment of the present invention, the length of the first profile may be smaller than the length of the second profile. Specifically, according to the experimental content, it is preferable that the length of the first profile is formed to be 1% or more and 7% or less of the length of the second profile.

One of the two outer points P4 and P5 may be included in the second profile, and the other outer point P4 may be included in the first profile. In FIG. 8 , tangent lines T4 and T5 and normal lines N4 and N5 drawn at each of the outer points P4 and P5 are shown. The burner 60 may be provided so that the normal line N5 drawn at the outer point P5 included in the second profile does not contact the inner surface of the combustion chamber (30 in FIG. 3 ).

The normal line N4 drawn at the outer point P4 included in the first profile may not contact the inner surface of the combustion chamber (30 in FIG. 3 ), but may contact it. Even if the normal (N4) at the outer point (P4) included in the first profile can contact the inner surface of the combustion chamber (30 in FIG. 3), the length of the first profile is formed smaller than that of the second profile Therefore, the amount of heat generated by the combustion reaction generated in the first profile is much smaller than the amount of heat generated by the combustion reaction generated in the second profile, so that the degree of heating of the side plate of the combustion chamber (30 in FIG. 3 ) may be weak.

The combustion region A3 may be provided such that a normal line drawn at an arbitrary point of the second profile does not contact the inner surface of the combustion chamber ( 30 in FIG. 3 ). Accordingly, the burner 60 according to the third embodiment may be formed so that the relation of Equation 1 can be established the same as in the first embodiment with respect to points located in the second profile of the third embodiment. In addition, even when the heat insulating material (FIG. 3 - 32) is disposed inside the combustion chamber (30 in FIG. 3), the relationship of Equation 1 can be established in the same way as in the first embodiment, according to the third embodiment. A burner 60 may be formed.

The mat peripheral portion 622 of the burner mat 62 according to the third embodiment is bent and coupled to the mat fixing portion 611 without forming a curve smoothly connected to the combustion region A3 in the one cross-section. can be

The lower surface 621 of the burner mat 62 according to the third embodiment may have a portion protruding from the burner frame 61 in the reference direction D1 as shown.

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: mix chamber
13: packing groove
15: outer part of the mixing chamber
20, 50, 60 : Burner
21, 51, 61: burner frame
22, 52, 62 : burner mat
23 : distribution plate
30: combustion chamber
31: side plate of the combustion chamber
32: insulation material
33: inner space
40: heat exchanger
71: inner packing
72: outer packing
100: Exemplary burner
101: Exemplary burner mat
102: Exemplary burner frame
104: side wall of an exemplary combustion chamber
211, 511, 611: mat fixing part
212: connection part
213: burner fixing part
221, 521, 621: if
222, 522, 622: around the mat
311: combustion chamber outer part
2131: chamber contact surface
2132: burner packing contact surface
A1, A2, A3 : Combustion area
D1 : Reference direction
D2: width direction
D3: longitudinal direction
P1, P2, P4, P5: Outer point
N1, N2, N3, N4, N5 : normal
T1, T2, T3, T4, T5: Tangent

Claims (8)

a burner causing a combustion reaction;
a combustion chamber positioned on the downstream side of the burner based on a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an inner surface surrounding an inner space in which the flame generated by the combustion reaction is located;
a heat insulator provided on the inner surface of the combustion chamber to insulate the combustion chamber; and
Using the heat generated by the combustion reaction, a heat exchanger including a heat exchange pipe through which the water flows along the inside to heat water to provide heating or to generate hot water,
The burner includes a combustion region that is a region in which the combustion reaction occurs among regions of a surface located at the most downstream side with respect to the reference direction,
The combustion region, a profile formed convexly along the reference direction in one cross-section is formed to extend in a direction perpendicular to the one cross-section,
When a direction perpendicular to the cross section is referred to as a longitudinal direction, and a direction orthogonal to the reference direction and the longitudinal direction is referred to as a width direction,
The heat insulator covers the inner surface facing the inside of the combustion chamber with respect to the width direction among the inner surfaces of the combustion chamber,
The combustion region, a normal line drawn at at least one of the two outermost points located on the outermost side with respect to the width direction is provided so as not to contact the heat insulating material. According to claim 1,
In the cross-section, the profile of the combustion region includes a first profile having an arc shape having a first radius of curvature, and a second profile having an arc shape having a second radius of curvature,
The second profile includes one of the outer points,
A normal line drawn at an outer point included in the second profile does not contact the heat insulating material, a water heater. 3. The method of claim 2,
The combustion zone, a normal line drawn at any point of the second profile, is provided so as not to contact the heat insulating material. delete According to claim 1,
Let θ be the magnitude of the acute angle formed by the straight line parallel to the reference direction and the normal line, let L be the distance from the outer point where the normal line is formed to the heat insulating material along the width direction, and the normal line along the reference direction When the distance from the outer point where this is formed to the point located on the most downstream side of the insulating material is H,
The burner is provided in a form that satisfies the following inequality, a water heater.

a burner causing a combustion reaction;
a combustion chamber positioned on the downstream side of the burner based on a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an inner surface surrounding an inner space in which the flame generated by the combustion reaction is located;
a heat insulator provided on the inner surface of the combustion chamber to insulate the combustion chamber; and
Using the heat generated by the combustion reaction, a heat exchanger including a heat exchange pipe through which the water flows along the inside to heat water to provide heating or to generate hot water,
The burner includes a combustion region that is a region in which the combustion reaction occurs among regions of a surface located at the most downstream side with respect to the reference direction,
The insulating material covers the inner surface facing the inside of the combustion chamber with respect to the horizontal direction among the inner surfaces of the combustion chamber,
The combustion zone, a normal line drawn at any point in the combustion zone, is provided so as not to contact the heat insulating material, water heater. a burner causing a combustion reaction;
a combustion chamber positioned on the downstream side of the burner with respect to a reference direction, which is a flow direction of the combustion gas generated by the combustion reaction, and having an internal space provided to allow the combustion gas to flow; and
Using the heat generated by the combustion reaction, it includes a heat exchanger for heating water to provide heating or to generate hot water,
The burner includes a combustion region that is a region in which the combustion reaction occurs among regions of a surface located at the most downstream side with respect to the reference direction,
In a cross-section of the burner cut in a plane perpendicular to the longitudinal direction perpendicular to the reference direction, the profile of the combustion region includes a first profile having an arc shape having a first radius of curvature, and an arc shape having a second radius of curvature. A second profile having a, and a third profile having an arc shape having a third radius of curvature,
The first profile and the third profile are respectively located at the outermost sides with respect to the width direction orthogonal to the reference direction and the length direction, and the width of the first profile and the third profile is based on the width direction. The sum is formed smaller than the width of the second profile,
The combustion zone is provided so that the normal drawn at any point of the second profile does not contact the inner surface of the combustion chamber.

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