KR102563876B1 - Water heating device and manufacturing method of smoke tube for water heating device - Google Patents

Abstract

The present invention relates to a water heater and a method for manufacturing a fire tube for the water heater, wherein the water heater includes a body having an internal space for accommodating water, provided in the internal space of the body, and a predetermined space for a combustion reaction to occur A combustion chamber that provides a combustion chamber, connected to the combustion chamber, provided to guide combustion gas generated during the combustion reaction from the combustion chamber to the outside of the body, and a fire tube wound in a spiral shape in at least a portion of the section and flowing inside the fire tube. In order to turbulentize the combustion gas, it may include a turbulator provided in at least some section inside the fire tube and wound in a spiral shape corresponding to the spiral shape of the fire tube.

Description

Water heater and fire tube manufacturing method for water heater {WATER HEATING DEVICE AND MANUFACTURING METHOD OF SMOKE TUBE FOR WATER HEATING DEVICE}

The present invention relates to a water heater and a method for manufacturing a fire tube for a water heater.

A water heater is a device that heats water. For example, a boiler that heats water in a container to heat a desired area and a water heater that discharges heated water may be included.

Among the water heaters, there is a water heater that includes a fire tube in the form of a coil inside. This water heater has a principle in which gas heated by a burner passes through a coil-shaped fire tube, and water located in the inner space of the water heater is heated.

Meanwhile, a turbulator may be located inside the association. The turbulator can turbulentize the flow of gas inside the fire tube, thereby increasing heat exchange efficiency between water and gas located in the space inside the water heater.

However, in the case of a water heater including a coil-shaped fire tube, it is mass-produced in a form in which a turbulator is not located therein due to the shape of the fire tube, so that the flow becomes laminar and the heat exchange efficiency is lowered.

In addition, in the case of a water heater including a coil-type fire tube, since a turbulator is not disposed inside, the length of the fire tube must be long to secure heat transfer performance, which causes a problem in that the space for water to enter the inside is narrowed. can

In addition, when attempting to place a turbulator on a coil-shaped link, it is difficult to place the turbulator inside the linkage due to the shape of the linkage.

An object of the present invention is to provide a water heater including a turbulator inside a coil-shaped fire tube.

In one example, the water heater is connected to a body having an internal space in which water is accommodated, a combustion chamber provided in the internal space of the body, and providing a predetermined space for a combustion reaction to occur, and the combustion chamber, the combustion reaction A fire tube, which is provided to guide combustion gas generated during the combustion from the combustion chamber to the outside of the body and is wound in a spiral shape in at least a portion of the fire tube, and the inside of the fire tube to turbulize the combustion gas flowing inside the fire tube. It is provided in at least some sections and may include a turbulator wound in a spiral shape corresponding to the spiral shape of the association.

In another example, the turbulator may be a twisted turbulator.

In another example, the turbulator is divided into a plurality of parts, and parts located on an upstream side based on the flow direction of the combustion gas among the plurality of parts are referred to as upstream parts, and a downstream side of the upstream parts When portions located at are referred to as downstream portions, a pitch of at least some of the upstream portions may be longer than a pitch of at least some of the downstream portions.

In another example, the turbulator is divided into a plurality of spiral regions, and regions located on an upstream side of the plurality of spiral regions based on a point where condensate occurs are referred to as upstream spiral regions, and the upstream spiral regions When regions located more downstream are referred to as downstream spiral regions, and a length connecting two points of the same phase in the spiral is referred to as a spiral pitch, the spiral pitch of at least some of the upstream spiral regions is It may be shorter than the helical pitch of at least some of them.

In another example, the turbulator may include a predetermined point on the fire tube spaced apart by a predetermined distance along the flow direction of the combustion gas from the inlet of the fire tube into which the combustion gas is introduced, and an outlet of the fire tube through which the combustion gas is discharged. may be provided in between.

In another example, the turbulator is formed by connecting a plurality of turbulator units for turbulizing the combustion gas, and at least two of the plurality of turbulator units may have different physical properties.

In another example, the plurality of turbulator units may be arranged according to a predetermined criterion based on the physical characteristics.

In one example, the manufacturing method of the fire pipe applied to the water heater includes preparing a straight fire pipe, preparing a twisted turbulator, inserting the twisted turbulator into the fire pipe, and the twisted fire pipe. It may include winding into a spiral shape with a turbulator.

In another example, preparing the twisted turbulator may include preparing a plurality of turbulator units having at least two different physical properties, and combining the plurality of turbulator units into a predetermined condition based on the physical properties. It may include a step of arranging and combining based on a standard.

According to the present invention, since the turbulator capable of turbulizing the flow is disposed inside the spiral fire tube, heat exchange efficiency can be increased.

In addition, according to the present invention, workability can be increased because the turbulator can be effectively disposed inside the spiral linkage.

1 is a diagram showing a body and a tube of a water heater according to an embodiment of the present invention.
2 is a diagram showing a combustion chamber and fire tube of a water heater according to an embodiment of the present invention.
3 and 4 are views showing a turbulator of a water heater according to an embodiment of the present invention.
5 is a diagram showing part of an example of a twisted turbulator.
6 is a flowchart illustrating a method of manufacturing a fire relation applied to a water heater according to an embodiment of the present invention.
Figure 7 is a flow chart showing the steps of preparing the twisted turbulator in Figure 6.

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

<Configuration of water heater>

A water heater according to an embodiment of the present invention relates to a water heater with increased heat exchange efficiency. The water heater according to an embodiment of the present invention may include a body 10, a combustion chamber 20, a fire extinguisher 30, and a turbulator 40. 1 is a view showing a body 10 and a pipe 30 of a water heater according to an embodiment of the present invention. 2 is a view showing a combustion chamber 20 and a fire tube 30 of a water heater according to an embodiment of the present invention. 3 and 4 are views showing a turbulator 40 of a water heater according to an embodiment of the present invention. For reference, in FIG. 2, for convenience of explanation, the body 10 is shown as a dotted line, and in FIGS. 3 and 4, the association 30 is shown as a dotted line for convenience of explanation.

The body 10 may include an inner space (S) in which water is accommodated. The combustion chamber 20 may be provided in the inner space (S) of the body (10). As shown in Figure 2, the combustion chamber 20 may be located on the upper side of the inner space (S) of the body (10). However, this may differ depending on the type of water heater. The water heater shown in FIG. 2 can be understood as a top-down water heater.

The combustion chamber 20 may provide a predetermined space for a combustion reaction to occur. The fire engine 30 is connected to the combustion chamber 20 and may guide combustion gas generated during a combustion reaction from the combustion chamber 20 to the outside of the body 10 . Associate 30 may be wound in a spiral shape in at least a portion of the section. A blower (not shown) may be provided at the inlet 31 of the fire tube 30 to generate a flow of combustion gas.

The turbulator 40 may be provided in at least a portion of the inside of the fire pipe 30 to turbulize the combustion gas flowing inside the fire pipe 30.

As shown in FIGS. 3 and 4 , the turbulator 40 may be wound in a spiral shape corresponding to the spiral shape of the tube 30 .

For example, consider a water heater that does not contain a turbulator inside the fire tube. In this case, the flow of combustion gas in the fire tube becomes laminar, and heat exchange efficiency may decrease.

In the water heater according to an embodiment of the present invention, since the turbulator 40 wound in a spiral shape corresponding to the spiral shape of the fire tube 30 is disposed inside the fire tube 30, the inside of the fire tube 30 It is possible to increase the heat exchange efficiency by turbulizing the combustion gas flowing in the

In addition, in the water heater according to an embodiment of the present invention, since the turbulator 40 wound in a spiral shape corresponding to the spiral shape of the fire tube 30 is disposed inside the fire tube 30, when there is no turbulator Since the heat exchange efficiency is higher than that of the fire tube 30, the length of the fire tube 30 can be made smaller than in the case without a turbulator under the same heat transfer performance, so the volume occupied by the fire tube 30 in the internal space S can be reduced, so, More water can be contained in the inner space (S).

<Twisted Turbulator (41)>

The turbulator 40 may be a twisted turbulator 41 . The twisted turbulator 41 may be formed by twisting a flat plate extending in one direction around a predetermined axis in one direction so as to have a double helix shape in which long sides of the flat plate are symmetrical to each other. 5 is a diagram showing part of an example of a twisted turbulator. The turbulator 40 of the water heater according to an embodiment of the present invention may be understood as a spiral wound twisted turbulator of FIG. 5 .

For example, a case of using a normal plate-shaped turbulator rather than a twisted turbulator can be considered. In this case, it may not be easy to wind the turbulator into a spiral shape in order to insert the turbulator into the spiral tube.

Since the water heater according to an embodiment of the present invention uses a twisted turbulator, it may be easier to wind the turbulator in a spiral shape to correspond to the shape of the spiral pipe than when using a plate-shaped turbulator. Therefore, since the spiral twisted turbulator can be disposed inside the spiral fire tube, heat exchange efficiency can be increased.

<Upstream parts 42 and downstream parts 43>

Hereinafter, the upstream parts 42 and the downstream parts 43 of the turbulator will be described in detail with reference to FIG. 3 . The pitch P1 of at least some of the upstream portions 42 of the turbulator 40 may be longer than the pitch P2 of at least some of the downstream portions 43 of the turbulator 40 . As shown in FIGS. 3 and 5, the pitch P can be understood as a length connecting two points having the same phase on the long side having a double helix shape of the twisted turbulator 41.

The upstream parts 42 may refer to parts that divide the turbulator 40 into a plurality of parts and are located upstream with respect to the flow direction D of the combustion gas among the plurality of parts. The downstream parts 43 may refer to parts located downstream of the upstream parts 42 . For example, the upstream parts 42 and the downstream parts 43 may be distinguished based on the 50% point in the length of the entire turbulator 40 .

As another example of a criterion for distinguishing the upstream portions 42 and the downstream portions 43, the upstream portions 42 based on the point where the rate of change of the pitch P is 10% or more in the entire turbulator 40 and downstream parts 43 can be distinguished. At this time, the pitch P1 of at least some of the upstream portions 42 of the turbulator 40 may be formed longer than the pitch P2 of at least some of the downstream portions 43 of the turbulator 40. there is.

In detail, the combustion gas temperature may be higher in a section in which the upstream parts 42 are disposed in the fire tube 30 than in a section in which the downstream parts 43 are disposed in the fire tube 30 . A high temperature of the combustion gas may mean a low density. In other words, a section in which the upstream portions 42 are disposed in the fire tube 30 may have a lower density of combustion gas than a section in the fire tube 30 in which the downstream portions 43 are disposed.

That is, based on the same mass of combustion gas, the volume of combustion gas in the section where the upstream portions 42 are arranged is greater than the volume of combustion gas in the section where the downstream portions 43 are arranged.

Therefore, the pitch P1 of at least some of the upstream portions 42 of the turbulator 40 is formed longer than the pitch P2 of at least some of the downstream portions 43 of the turbulator 40, The resistance of the parts 42 to combustion gases can be reduced.

The formation of a relatively long pitch of a specific part of the turbulator may mean that the number of times the turbulator is twisted within the same reference length is relatively small. It can be understood that the turbulators cause relatively little turbulence.

In the water heater according to an embodiment of the present invention, since the pitch P of at least some of the upstream portions 42 is longer than the pitch P of at least some of the downstream portions 43, the water heater has a relatively high temperature. Compared to the upstream portions 42 where the combustion gas is located, more turbulence occurs in the downstream portions 43 where the relatively low-temperature combustion gas is located, so that the heat exchange efficiency can be increased.

In addition, the turbulator 40 may act as resistance to the wind generated by the blower to flow the combustion gas. In the water heater according to an embodiment of the present invention, since the pitch P of at least some of the upstream portions 42 is longer than the pitch P of at least some of the downstream portions 43, the upstream portion of the fire The portion where the slabs 42 are located may generate a flow having a strong laminar flow characteristic compared to the portion where the downstream portions 43 are located. Thus, it is possible to reduce the resistance to the blower that the upstream portions 42 of the turbulator may generate, thereby reducing the blower load.

In order to further reduce the blower load described above, the turbulator 40 may be provided between a predetermined point 33 on the fire tube 30 and the outlet 32 of the fire tube 30 from which combustion gas is discharged. The predetermined point 33 on the fire tube 30 may mean a point spaced apart by a predetermined distance from the inlet 31 of the fire tube 30 into which the combustion gas is introduced along the flow direction D of the combustion gas.

As shown in FIGS. 3 and 4 , the flow direction D can be understood as a direction in which combustion gas flows along the shape of the fire tube 30 . Hereinafter, expressions such as upstream and downstream will be described in detail based on the flow direction D of the combustion gas in the fire tube 30 .

For example, the material of the turbulator 40 may be variously configured. Since the area where oxidation or corrosion of the turbulator 40 occurs due to high temperature varies depending on the material of the turbulator 40, oxidation or corrosion of the turbulator 40 may not occur in the fire tube 30 A turbulator may be placed in a section where a temperature is formed.

For example, when the temperature at which x steel species are corroded by high temperature oxidation is 600 degrees, the temperature of the inlet 31 of the fire pipe 30 in the absence of a turbulator is 1100 degrees, and the temperature of the outlet 32 is 100 degrees , x The turbulator made of steel can be disposed in the section from the downstream 50% point of the fire tube 30 to the outlet 32. That is, in the case of steel class x, the predetermined point may be a point 50% downstream of the pipe 30.

As another example, the temperature at which y steel species are corroded by high-temperature oxidation is 300 degrees, the temperature of the inlet 31 of the tube 30 in the absence of a turbulator is 1100 degrees, and the temperature of the outlet 32 is 100 degrees In this case, the turbulator made of steel y may be disposed in the section from the downstream 20% point of the pipe 30 to the outlet 32. That is, in the case of steel grade y, the predetermined point may be a point 20% downstream of the pipe 30.

In this case, since the turbulator 40 can be disposed in a section where a temperature at which oxidation or corrosion of the turbulator 40 does not occur within the fire tube 30 is formed, oxidation or corrosion of the turbulator 40 this may be reduced.

Also, in this case, since the turbulator 40 is not disposed from the inlet 31 to the predetermined point 33, the blower load can be further reduced.

<Upstream spiral regions 44 and downstream spiral regions 45>

Hereinafter, with reference to FIG. 4 , the upstream spiral regions 44 and the downstream spiral regions 45 of the turbulator 40 will be described in detail. The spiral pitch HP1 of at least some of the upstream spiral regions 44 of the turbulator 40 may be shorter than the spiral pitch HP2 of at least some of the downstream spiral regions 45 .

The upstream spiral regions 44 divide the turbulator 40 into a plurality of spiral regions, and mean regions located upstream of the plurality of spiral regions based on the point where condensate occurs. can do. The downstream spiral regions 45 may refer to regions located downstream of the upstream spiral regions 44 .

For example, when the temperature of the water filled in the internal space S of the body 1 is relatively low, a point where condensate occurs relatively can be formed upstream of the pipe 30, so that the downstream spiral regions It can be understood that the length of (45) is relatively long.

Conversely, when the temperature of the water filled in the internal space S of the body 1 is relatively high, the point where condensate occurs relatively can be formed downstream of the pipe 30, so that the downstream spiral regions ( 45) can be understood as being relatively short.

As another example of a criterion for distinguishing the upstream spiral regions 44 and the downstream spiral regions 45, the upstream spiral regions 44 are based on a point that is 50% of the total length of the entire turbulator 40. and downstream spiral regions 45 may be distinguished.

As another example, the upstream spiral regions 44 and the downstream spiral regions 45 may be distinguished based on the portion where the thickness of the turbulator 40 changes.

As another example, the upstream spiral regions 44 and the downstream spiral regions 45 may be divided based on the portion where the steel type of the turbulator 40 changes.

As another example, the upstream spiral regions 44 and the downstream spiral regions 45 may be distinguished based on a portion where the increase/decrease rate of the spiral pitch HP is 10% or more. Hereinafter, the helical pitch (HP) will be described in detail.

As shown in FIG. 4 , the spiral pitch (HP) may mean a length connecting two points having the same phase in the spiral. That is, it can be understood that the part of the spiral having a short helical pitch has a gentle slope drawn by the locus of points moving along the spiral, compared to the part of the spiral having a long helical pitch.

Since the combustion gas temperature is relatively low in a portion located on the downstream side of the fire tube 30, more condensate may be generated than a portion located on the downstream side of the fire tube 30. In the heat exchanger according to an embodiment of the present invention, since the spiral pitch HP1 of at least some of the upstream spiral regions 44 is shorter than the spiral pitch HP2 of at least some of the downstream spiral regions 45, A region located downstream of the pipe tube 30 may have a large slope corresponding to at least some of the downstream spiral regions 45, which may be advantageous for discharging condensate.

For example, when the slope of the downstream spiral regions 45 is less than 3˚, when condensate is generated, the condensate is not discharged due to surface tension and remains stagnant, causing the pipe 30 to corrode ( 30) may have problems with durability. Accordingly, at least some of the downstream spiral regions 45 may have a spiral pitch in which an inclination of the downstream spiral regions 45 may be 3° or less.

<Turbulator (40) unit>

The turbulator 40 may be formed by connecting a plurality of turbulator units 40 ′ for turbulizing combustion gas. Physical characteristics of at least two of the plurality of turbulator units 40' may be provided to be different from each other. The physical properties may include, for example, external appearance, material, length, thickness, mass, volume, strength, density, pitch (P, FIG. 5 ), and the like.

For example, since the temperature of the upstream region of the fire tube 30 is relatively higher than that of the downstream region of the fire tube 30 where combustion gas is discharged, the turbulator 40 may be oxidized and corroded. Therefore, the thickness of the turbulators discharged to the upstream region of the fire tube may be relatively thicker than the thickness of the turbulators discharged to the downstream region of the fire tube. Alternatively, heat resistance performance of a turbulator discharged in an upstream region of the fire tube may be relatively better than heat resistance performance of a turbulator discharged in a downstream region of the fire tube.

The plurality of turbulator units 40' may be arranged according to predetermined criteria based on physical characteristics. For example, turbulator units with a long pitch may be arranged on a relatively upstream side, and turbulator units with a short pitch may be arranged on a relatively downstream side. Alternatively, turbulator units having a large mass may be disposed on a relatively upstream side, and turbulator units having a small mass may be disposed on a relatively downstream side.

As the physical properties of at least two of the plurality of turbulator units are provided to be different from each other, a desired turbulator may be manufactured and used according to the needs of the user. For example, when a user desires to place turbulator units having a long pitch on the upstream side of the fire tube 30 and turbulator units having a short pitch on the downstream side of the fire tube 30, this type of turbulator can be produced

<Manufacturing method of pipe>

Hereinafter, a method for manufacturing a pipe applied to a water heater according to an embodiment of the present invention will be described with reference to FIGS. 6 and 7 . 6 is a flowchart illustrating a method of manufacturing a fire relation applied to a water heater according to an embodiment of the present invention. Figure 7 is a flow chart showing the steps of preparing the twisted turbulator in Figure 6.

Since the general configuration of the water heater is as described above, a detailed description thereof will be omitted. Also, for understanding, reference may be made to FIGS. 1 to 5 .

As shown in FIG. 6, the method of manufacturing the fire pipe 30 applied to the water heater includes preparing a straight fire pipe (S100), preparing a twisted turbulator (S200), and twisting the inside of the fire pipe. It may include a step of inserting a turbulator (S300) and a step of winding the association into a spiral shape with the twisted turbulator (S400).

For example, a method of preparing a straight pipe, winding it into a spiral shape, and then inserting a straight twisted turbulator can be considered. In this case, it may be difficult to insert a straight twisted turbulator due to the spiral shape of the linkage.

According to the method of manufacturing a fire tube applied to a water heater according to an embodiment of the present invention, after inserting a twisted turbulator into a straight fire pipe, the fire pipe and the twisted turbulator are wound together in a spiral shape, so that the twisted turbulator is It is possible to efficiently manufacture a relationship in which a radiator is placed inside.

As shown in FIG. 7, the step of preparing the twisted turbulator is the step of preparing a plurality of turbulator units having at least two different physical properties (S210) and the plurality of turbulator units based on the physical properties It may include a step of arranging and combining according to a predetermined standard (S220).

For example, when a user wants to prepare a twisted turbulator in which turbulator units having a relatively long pitch are disposed on the upstream side of the linkage, and turbulator units having a relatively short pitch can be disposed on the downstream part of the linkage, the pitch After preparing a plurality of turbulator units having a relatively long pitch and a plurality of turbulator units having a relatively short pitch, arranging them along the length of the pitch, it is possible to connect them to each other.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical 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 according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: body
20: combustion chamber
30: Association
31: entrance
32: exit
33: predetermined point
40: Turbulator
40' turbulator unit
41: Twisted Turbulator
42: Upstream parts of the turbulator
43: downstream parts of the turbulator
44 upstream helix regions
45: downstream helix regions
D: flow direction
HP: Spiral Pitch
HP1: spiral pitch of at least some of the upstream spiral regions
HP2: spiral pitch of at least some of the downstream spiral regions
P: Pitch
P1: pitch of at least some of the upstream parts
P2: pitch of at least some of the downstream parts
S: interior space

Claims (9)

A body having an inner space provided to accommodate water;
a combustion chamber provided in the internal space of the body and providing a predetermined space for a combustion reaction to occur;
a pipe connected to the combustion chamber, provided to guide combustion gas generated during the combustion reaction from the combustion chamber to the outside of the body, and wound in a spiral shape in at least a portion of the section; and
A turbulator provided in at least a part of the inside of the fire pipe to turbulize the combustion gas flowing inside the fire pipe and wound in a spiral shape corresponding to the spiral shape of the fire pipe,
The turbulator is divided into a plurality of spiral regions, and regions located upstream of the point where condensate water is generated are called upstream spiral regions, and The regions located are called downstream spiral regions,
When the length connecting two points of the same phase in a spiral is called the spiral pitch,
A spiral pitch of at least some of the upstream spiral regions is shorter than a spiral pitch of at least some of the downstream spiral regions. The method of claim 1,
The turbulator is a twisted turbulator, a water heater. The method of claim 2,
The turbulator is divided into a plurality of parts, parts located upstream of the plurality of parts based on the flow direction of the combustion gas are referred to as upstream parts, and parts located downstream of the upstream parts When these are the downstream parts,
A pitch of at least some of the upstream portions is longer than a pitch of at least some of the downstream portions. delete The method of claim 1,
The turbulator is provided between a predetermined point on the link spaced apart from the inlet of the link through which the combustion gas flows by a predetermined distance along the flow direction of the combustion gas and the outlet of the link through which the combustion gas is discharged , water heater. The method of claim 1,
The turbulator is formed by connecting a plurality of turbulator units for turbulizing the combustion gas,
At least two physical properties of the plurality of turbulator units are provided to be different from each other, the water heater. The method of claim 6,
Wherein the plurality of turbulator units are arranged according to a predetermined criterion based on the physical properties. In the manufacturing method of the fire pipe applied to the water heater,
preparing a linear association;
preparing a twisted turbulator;
inserting the twisted turbulator into the interior of the tube; and
winding the linkage into a spiral shape with the twisted turbulator;
The twisted turbulator is divided into a plurality of spiral regions, and regions located upstream of the point where condensate is generated among the plurality of spiral regions are referred to as upstream spiral regions, and regions located downstream of the upstream spiral regions The regions located at are called downstream spiral regions,
When the length connecting two points of the same phase in a spiral is called the spiral pitch,
The spiral pitch of at least some of the upstream spiral regions is shorter than the spiral pitch of at least some of the downstream spiral regions. The method of claim 8,
The step of preparing the twisted turbulator,
Preparing a plurality of turbulator units having at least two different physical properties;
Arranging and combining the plurality of turbulator units on a predetermined basis based on the physical characteristics.

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