KR102387283B1 - Gas boiler system and mixer - Google Patents

Abstract

The mixer of the gas boiler according to the present invention, an air inlet formed on one surface so that the combustion air that has passed through the blower is injected into the inside, a gas supply means coupled to one surface so that fuel gas is supplied to the inside, and the gas supply means are combined It includes an outlet formed on a surface other than the surface, and the outlet is characterized in that the mixed gas in which combustion air and fuel gas are mixed is discharged to the outside. The gas boiler system is characterized in that it improves the combustion efficiency of fuel gas by including the mixer having the characteristics as described above. According to the present invention having such a configuration, there is an advantage that it is possible to provide a gas boiler system and a mixer capable of improving the combustion efficiency of fuel gas.

Description

Gas boiler system and mixer

The present invention relates to a mixture of combustion air and fuel gas and a gas boiler system including the same, and by supplying a mixture gas in which combustion air and fuel gas are mixed by 180 degrees inside to a surface combustion burner, combustion efficiency is improved It relates to a mixer capable of increasing and to a gas boiler system including the same.

In general, gas boilers are divided into wall-mounted type and floor-mounted type according to their installation type. It is divided into a method of supplying hot water when necessary. In addition, depending on the heating water circulation method, it is divided into an atmospheric shutoff type in which the heating circulation circuit in the boiler is blocked from the atmosphere and an atmospheric open type in which the heating circuit in the boiler is opened.

Such a gas boiler receives and mixes external gas and air, and by supplying the mixed gas to the burner unit, the mixed gas is combusted in the burner unit and ignited.

And, in a state in which the heating pipe and the pipe body are filled with water, it is heated by the gas burner and supplied to the heating pipe and hot water supply pipe by the circulation pump to heat the room or to supply hot water.

Patent Document 1 is a document disclosed with respect to a conventional gas boiler. Referring to this, a combustion chamber installed in the body, a burner coupled to one end of the combustion chamber, and one end connected to the burner, the other end connected to the intake pipe, to supply air to the burner It consists of an air supply pipe for supplying gas, and a gas supply pipe having one end connected to the burner and the other end connected to an external gas pipe to supply gas to the burner.

At this time, when the air intake fan installed between the burner and the air supply pipe is driven, suction pressure is formed in the air suction pipe by the air suction fan, and accordingly, external air is drawn into the intake pipe through the intake hole of the intake pipe connected to the end of the air supply pipe. is supplied

Then, the air supplied into the intake pipe is supplied to the burner through the air supply pipe.

At the same time, gas is supplied through a gas supply pipe, and the gas is supplied to a burner and is changed into a mixed gas while being mixed with air.

At this time, the mixed gas generated by the burner is burned in the combustion chamber to ignite the combustion chamber.

However, in Patent Document 1 as described above, while air is rapidly passed through a smooth cylindrical air supply pipe, the gas supplied to the burner is pushed in the burner direction as it is, so that the gas and air mixing ratio is reduced, and the gas and air mixing ratio Due to the deterioration, the mixed gas cannot be ignited in the combustion chamber, or the ignition performance is rapidly deteriorated due to the occurrence of explosion ignition or ignition delay. there is.

Republic of Korea Patent Registration No. 10-0268001 (Name: Device for detecting the connection state of the air supply pipe of a gas hot air blower, registration date: 10.05. 1999)

The present invention was invented to improve the above problems, and the problem to be solved by the present invention is, in the mixing of the combustion air and fuel gas injected into the mixer, the air:gas mixing ratio over the entire volume of the mixed gas To provide a mixer capable of improving the combustion efficiency of fuel gas by uniformly mixing and discharging the mixed gas to the outside of the mixer so that the air:gas mixing ratio is evenly distributed over the entire area of the mixed gas discharging portion.

In addition, another problem to be solved by the present invention is to provide a gas boiler system capable of improving the combustion efficiency of the overall fuel gas of the system by providing a mixer capable of improving the combustion efficiency of the fuel gas as described above. .

The technical problem of the present invention is not limited to those mentioned above, and another technical problem not mentioned will be clearly understood by those skilled in the art from the following description.

A mixer according to an embodiment of the present invention devised to achieve the above object is a mixer for a gas boiler used to mix combustion air and fuel gas, one surface so that combustion air passing through the blower is injected into the inside It includes an air inlet formed in the air inlet, a gas supply means coupled to one surface so that fuel gas is supplied to the inside, and an outlet formed on a surface other than the surface to which the gas supply means is coupled, wherein the outlet is a mixture of combustion air and fuel gas The mixed gas is discharged to the outside, and inside, it extends from the edge facing the air inlet among the surfaces opposite to the surface including the air inlet to the vicinity of the diagonally opposite edge to the edge and crosses the inside with a large slope and air Among the surfaces including the inlet, it protrudes in the downward direction of the air inlet, and the lower side from the apex is provided with a large inclined surface and a protruding surface spaced at regular intervals from it. A narrow passage is formed in which the flow cross-sectional area of the gas is narrowed, and the mixed gas is discharged through the outlet after passing through the narrow passage and collides with opposite edges to form a diffraction flow in which the flow direction is reversed.

In addition, the mixer is provided with a baffle plate in which perforations are formed over the entire area around the inner direction of the air inlet, and the combustion air passes through the rectifier plate and then is delivered at a constant speed over the entire length of the gas supply means. characterized by being

In addition, the gas supply means of the mixer is a pipe type or a hollow cylindrical shape, characterized in that it comprises a plurality of gas injection holes formed to be spaced apart to have regular intervals in the longitudinal direction and the circumferential direction.

In addition, a mixed gas distribution plate in which a plurality of through holes are formed so that the diffracted flow can flow therethrough is included in the middle from the opposite inner edge of the mixer to the outlet, and the diameter of each of the plurality of through holes is the mixed gas distribution plate It is characterized in that it gradually increases in the direction from the bottom to the top.

In addition, the gas boiler system includes a mixing module in which air and gas flowing in from the outside are mixed, a combustion module that receives the mixed air and gas from the mixing module and is combusted, and heat generated by combustion in the combustion module passes through a heat exchanger. Thereafter, it is configured to include a waste heat recovery body module that recovers some heat, and the mixing module is characterized in that it includes a mixer implemented to include any one or more of the features listed above.

According to an embodiment of the present invention, when the mixed gas is discharged to the outside of the mixer, the air:gas mixing ratio is evenly distributed over the entire area of the mixed gas discharge portion, thereby providing a mixer capable of improving the combustion efficiency of fuel gas has the effect of

In addition, according to an embodiment of the present invention, by providing a mixer capable of improving the combustion efficiency of fuel gas, there is an effect of providing a gas boiler system capable of improving the combustion efficiency of the entire fuel gas system.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is an exploded perspective view of each component of a gas boiler having a mixer, according to an embodiment of the present invention.
2A is a perspective view of a mixer, according to an embodiment of the present invention.
2B is a cross-sectional view of a mixer, according to an embodiment of the present invention.
3 is a perspective perspective view for showing a rectifier plate provided in the interior of the mixer and its peripheral configuration according to an embodiment of the present invention.
4 is a perspective view of a gas supply means provided inside a mixer according to an embodiment of the present invention.
5 is a front view of a mixed gas distribution plate provided inside the mixer according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily practice the present invention.

In describing the embodiments, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention without obscuring the gist of the present invention by omitting unnecessary description.

For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings. In addition, the size of each component does not fully reflect the actual size. In each figure, the same or corresponding elements are assigned the same reference numerals.

1 is an exploded perspective view of each component of a gas boiler having a mixer, according to an embodiment of the present invention.

Referring to FIG. 1 , a gas boiler system 1000 having a mixer according to an embodiment of the present invention is combusted into the mixer using power generated by operating a motor in the order from the left to the right of the drawing. The blower 80 for injecting the air for combustion, the combustion air injected from the blower 80 and the fuel gas supplied through the gas supply pipe 90 are mixed, and the mixed gas is discharged in the direction combined with the surface combustion burner 200. mixer 100, a surface combustion burner 200 that receives and burns the mixed gas discharged from the mixer 100 to generate heat, and a heat exchanger that absorbs heat generated by combustion of the mixed gas and transfers it to the working fluid ( 300 ), an upper vacuum chamber 400 , a lower water pipe part 500 , and a waste heat recovery body 600 .

The mixer 100 provided in the gas boiler system 1000 will be described below with reference to FIGS. 2 to 5 .

2 is for explaining a mixer, according to an embodiment of the present invention;

Figure 2 (a) is a perspective view of a mixer, according to an embodiment of the present invention,

2B is a cross-sectional view of a mixer, according to an embodiment of the present invention.

Referring to FIG. 2( a ), a perspective view of the mixer 100 having a shape close to a rectangular parallelepiped having upper and lower surfaces having a width in the left and right direction greater than a depth in the inward direction is shown.

An air inlet 10 through which combustion air is injected is opened near the upper center of the mixer 100, and it can be seen that the vicinity has the same height as the air inlet 10 and protrudes rather than a rectangular parallelepiped shape. The fact that the vicinity of the air inlet 10 protrudes from the rectangular parallelepiped shape of the mixer 100 as a whole is a matter that can be changed and adjusted according to the embodiment. Please note in advance that this is not intended to be

In addition, it can be seen that the gas supply means 20 is coupled to the right surface of the mixer 100 based on the drawing direction to supply fuel gas to the inside of the mixer 100 .

Since the gas supply means 20 will be described in detail with reference to FIG. 4 , a detailed description is not provided herein.

After the combustion air injected into the mixer 100 through the air inlet 10 and the fuel gas supplied into the mixer 100 through the gas supply means 20 are evenly mixed in the mixer 100, the mixer (100) is discharged to the outside, is transferred to the burner / combustor and is combusted, and by the structure provided inside the mixer 100, the air:gas ratio of the mixed gas is made uniform as a whole, and then the mixed gas is discharged. It is provided inside the mixer 100 .

This will be described with reference to FIG. 2(b).

Referring to FIG. 2( b ), the air inlet 10 is formed at the upper left side of the mixer 100 , and the combustion air that has passed through the blower 80 is supplied into the mixer through the air inlet 10 .

At this time, the air flow is indicated by an arrow, the white arrow indicates the flow direction of the combustion air, and the gray arrow indicates the flow direction of the mixed gas formed by mixing the combustion air with the fuel gas.

In Fig. 2(b), the gas supply means 20 is shown by a dotted line.

The combustion air injected into the mixer 100 through the air inlet 10 first meets the curved surface 15 during the flow, and the flow direction is changed to the gas supply means 20 direction, so that the gas supply means 20 vicinity is mixed with the fuel gas supplied to the inside of the mixer 100 through the gas supply means 20 to become a mixed gas.

Here, between the end of the curved surface 10 and the surface of the gas supply means 20, a rectifying plate 30 is provided for the purpose of uniformly adjusting the flow rate over the entire flow cross-sectional area of the combustion air. The shape of (30) is shown in FIG. 3 .

Combustion air passing through the rectifying plate 30 and the gas supply means 20 is mixed with the fuel gas to form a mixed gas, and the flow of the mixed gas is indicated by a gray arrow.

In addition, a structure capable of diffracting the flow direction of the mixed gas in the opposite direction is provided inside the mixer 100 . A structure for diffracting the mixed gas will be described.

Inside the mixer 100, from the edge facing the air inlet 10 among the surfaces opposite to the surface including the air inlet 10, it extends to the vicinity of the edge opposite to the edge in the diagonal direction to cross the inside. A slope 25 is provided,

A protruding surface ( 35) is provided,

A narrow passage 45 in which the flow cross-sectional area of the mixed gas is narrowed is formed by the vicinity of the lower end of the large inclined surface 25 and the protruding surface 35 opposite thereto,

mixed gas,

By hitting the opposite edge after passing through the narrow passage (45),

After forming a diffraction flow with the flow direction reversed as indicated by the arrow in the mixed gas turning direction 48, the flow characteristics are adjusted to have a constant flow velocity distribution for each location (height) over the entire flow area and height through the mixed gas distribution plate 50 Thereafter, it is discharged to the outside of the mixer 100 through the right side (discharge port) of the mixer 100 .

As described above, in discharging the mixed gas discharged through the mixer 100, by adjusting the flow rate distribution of the mixed gas to be constant over the entire discharge cross-sectional area and discharging, the subsequent combustion efficiency of the mixed gas can be improved. , the possibility of occurrence of unstable situations such as flame backflow is significantly reduced, and accordingly, the performance and stability of the mixer 100 are improved, and thus the life of the mixer 100 is extended accordingly. Of course, it is needless to say that the same effect can be expected for the gas boiler system 1000 to which the mixer 100 according to an embodiment of the present invention is applied.

3 is a perspective perspective view for showing a rectifier plate provided in the interior of the mixer and its peripheral configuration according to an embodiment of the present invention.

Referring to Figure 3, the mixer 100 is provided with a rectifier plate 30 in which a hole of a certain size is formed over the entire area in the inner direction and around the air inlet 10 near the upper end, the air inlet (10) The combustion air injected into the mixer 100 through will pass

Here, since it has a constant flow rate over the entire flow section, it is a self-evident fact that the pressure is transmitted to the surface of the gas supply means 20 within a certain error range.

4 is a perspective view of a gas supply means provided inside a mixer according to an embodiment of the present invention.

Referring to FIG. 4 , the gas supply means 20 has a pipe shape, and a flange 24 having a plurality of coupling holes 26 formed at one end thereof is coupled, and the flange 24 and the coupling hole 26 are coupled thereto. is coupled to the outer surface of the mixer 100 using

At this time, a plurality of gas injection holes 22 are provided on the surface of the pipe, and the gas injection holes 22 are formed to be spaced apart from each other so as to have regular intervals in the longitudinal and circumferential directions of the gas supply means 20 .

Here, the spacing of the gas injection holes 22 may be appropriately adjusted according to the embodiment, and the spacing in the longitudinal direction and the spacing in the circumferential direction may be the same or different, which is the purpose of the embodiment and It can be appropriately adjusted according to the environment.

In addition, depending on the embodiment, the spacing of the gas injection holes 22 may be adjusted to change gradually as it progresses in any direction without being constant, which may be appropriately adjusted according to the purpose and environment of the implementation.

5 is a front view of a mixed gas distribution plate provided inside the mixer according to an embodiment of the present invention.

Referring to FIG. 5 , the mixed gas distribution plate 50 has a rectangular shape, and a plurality of through holes are formed over almost the entire area. Here, when observing the size of the through hole, it can be seen that the mixed gas distribution plate 50 gradually increases from the bottom to the top.

In one embodiment of the mixed gas distribution plate 50 of FIG. 5, this through hole is referred to as a mixed gas discharge hole, and there are three sizes. The number of these sizes is not necessarily limited to three. It may be adjusted to have more various sizes, or may be adjusted to a smaller number of sizes.

In one embodiment of the mixed gas distribution plate 50 shown in FIG. 5 , the sizes of the mixed gas discharge holes are three, and the size (diameter) of the mixed gas discharge hole-small 52 located at the bottom is the smallest. , the diameter of the mixed gas discharge hole-in (54) located at the middle height is the medium size, and the diameter of the mixed gas discharge hole-stand (56) located near the top is the largest.

As described above, the reason that the size (diameter) of the mixed gas discharge hole is formed differently depending on the location is that the mixed gas formed by mixing the fuel gas with the combustion air passing through the gas supply means 20 is narrow ( 45) and then turned, before being discharged to the right side of the mixer 100, so that the flow rate of the mixed gas is uniformly distributed over the entire right side.

That is, at a height close to the end of the narrow passage 45 , the size of the mixed gas discharge hole is reduced to reduce the amount of the mixed gas flowing through the mixed gas distribution plate 50 , and is far away from the end of the narrow passage 45 . In the height, by increasing the size of the mixed gas discharge hole to increase the amount of the mixed gas flowing through the mixed gas distribution plate 50 , the mixed gas flow rate distribution according to the height change of the mixed gas distribution plate 50 is uniformly is to adjust

In addition, a pair of fixing through-holes are respectively formed in the vicinity of the left end and the right end of the mixed gas distribution plate 50 . At this time, the number of through-holes for fixing is not necessarily limited to one pair at each end, and an appropriate number of through-holes may be provided at each end in one or more numbers according to the embodiment.

On the other hand, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms are used, these are only used in a general sense to easily explain the technical content of the present invention and help the understanding of the present invention, It is not intended to limit the scope of the invention. It is apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

10: air inlet 15: curved surface
20: gas supply means 25: large slope
30: baffle plate 35: protruding surface
36: apex 45: narrow road
46: mixed gas inflow direction 48: mixed gas swirling direction
50: mixed gas distribution plate 52: mixed gas discharge hole-small
53: mixed gas discharge amount 54: mixed gas discharge air-medium
55: mixed gas discharge amount 56: mixed gas discharge hole-large
57: mixed gas discharge amount 59: mixed gas discharge amount
80: blower 90: gas supply pipe
100: mixer 200: surface combustion burner
300: heat exchanger 400: upper vacuum chamber
500: lower water pipe part 600: waste heat recovery body
1000: gas boiler system

Claims (6)

In the mixer for a gas boiler used so that combustion air and fuel gas are mixed,
an air inlet formed on one surface so that the combustion air passing through the blower is injected into the inside;
a gas supply means coupled to one surface so that the fuel gas is supplied to the inside; and
and an outlet formed on a surface other than the surface to which the gas supply means is coupled;
The outlet is
Discharging the mixed gas in which the combustion air and the fuel gas are mixed to the outside,
Inside the above,
a large inclined surface extending from a corner facing the air inlet among the surfaces opposite to the surface including the air inlet to near a corner facing the corner in a diagonal direction to cross the inside; and
Among the surfaces including the air inlet, a protruding surface protruding in the inward direction below the air inlet and downward from the vertex is spaced apart from the large inclined surface at regular intervals; is provided;
A narrow passage in which the cross-sectional area of the flow of the mixed gas is narrowed by the vicinity of the lower end of the large inclined surface and the protruding surface opposite thereto is formed;
The mixed gas is
By hitting the opposite edge after passing through the narrow passage,
After forming the diffraction flow with the flow direction reversed, it is discharged to the outside through the outlet,
midway from the opposite edge to the outlet,
A mixed gas distribution plate having a plurality of through holes is included so that the diffracted flow can flow therethrough,
The mixer, characterized in that the diameter of each of the plurality of through-holes gradually increases in a direction from the lower side to the upper side of the mixed gas distribution plate.
The method of claim 1,
A rectifying plate in which perforations are formed over the entire area is provided around the inner direction of the air inlet,
The combustion air is
After passing through the rectifying plate,
A mixer, characterized in that delivered at a constant speed over the entire length of the gas supply means.
The method of claim 1,
The gas supply means,
As a pipe-like or hollow cylinder,
A mixer comprising a plurality of gas injection holes spaced apart from each other so as to have regular intervals in the longitudinal direction and the circumferential direction.
delete delete A mixing module in which air and gas flowing in from the outside are mixed;
It is configured to include a combustion module that receives the mixed air and gas from the mixing module and burns it, and a waste heat recovery body module that recovers some heat after the heat generated by combustion in the combustion module passes through a heat exchanger,
The mixing module is a gas boiler system, characterized in that it comprises the mixer according to any one of claims 1 to 3.

Images