KR20240003579A - Hearing boiler and control method of the same - Google Patents

Abstract

The present invention relates to a boiler for both instantaneous and storage heating water supply, which is equipped with both instantaneous and storage heating methods, and is capable of selectively applying them. Heat exchange is performed in which combustion gas supplied from a combustor and heating water are heat exchanged. energy; A water tank that stores heating water supplied from the heat exchanger; A first connection pipe connected between the heat exchanger and the water tank, through which heating water is transferred from the heat exchanger to the water tank; a second connection pipe connected between the heat exchanger and the water tank, through which heating water is transferred from the water tank to the heat exchanger; Heating water supply pipe connecting the inlet of the heating pipe and the water tank; Heating water return pipe connecting the outlet of the heating pipe and the water tank; and a direction change valve connected to the second connection pipe and the heating water return pipe from the outside of the water tank to change the flow of the heating water returned through the outlet of the heating pipe to the water tank or the heat exchanger.

Description

Heating boiler and control method thereof {Hearing boiler and control method of the same}

The present invention relates to a heating boiler and a control method thereof, and more specifically, to a heating boiler and a control method thereof that are configured to select instantaneous type and storage type as the supply method of heating water supplied to a heat exchanger.

In general, boilers used in homes, offices, factories, and various public buildings are divided into instantaneous boilers and storage boilers depending on the method of heating water. Instantaneous and storage boilers are selected and used depending on the type of residence or heating and hot water usage patterns.

Instantaneous boilers have the advantage that direct water (i.e., cold water) supplied through a direct water pipe is supplied to a heat exchanger, instantaneously heated by a burner, and then supplied to the user. These instantaneous boilers are suitable for households that have a small amount of hot water or use boilers primarily for heating.

However, although instantaneous boilers have a fast heating speed, they have the disadvantage of not being able to supply enough hot water due to the small amount of direct water that can be heated at one time.

The storage type boiler has the advantage that the cold water flowing in through the direct water pipe is always heated to an appropriate high temperature by a heat exchange coil installed in the hot water tank, so the user can use hot water right away, and the hot water supply is larger than the instantaneous boiler. These storage boilers have a large irrigation capacity, so they are suitable for households with many family members or those who use a lot of hot water.

However, storage boilers consume more fuel than instantaneous boilers due to frequent ignition of the burner, and installation space is limited because the hot water tank must be installed separately. In addition, if there is a leak in the heat exchanger due to high hot water usage or as the boiler ages, In some cases, it has the disadvantage of incurring high parts replacement costs.

As mentioned above, instantaneous boilers and storage boilers have pros and cons, so it is meaningless to compare which method is more preferable. Nevertheless, because conventionally instantaneous and storage methods were used separately, one of the two methods had to be selected at the time of installation, taking into account heating and hot water usage patterns. Therefore, there was a problem that once installed, it had to be used the same way.

The present invention was developed to solve the problems of the prior art as described above, and is made so that both instantaneous and stored water supply methods can be applied as heating water supplied to the heat exchanger, so that one of the two methods can be selected depending on the heating environment. The purpose is to provide applicable heating boilers and their control methods.

The heating boiler according to a preferred embodiment of the present invention is a boiler that stores heating water heated in a heat exchanger in a water tank and then supplies it to a heating pipe for heating. The heating pipe is connected by connecting the outlet of the water tank and the heating pipe. A first water return path that returns the heated water to the water tank; a second water return path that connects the heat exchanger and the water tank to return heating water for heating from the water tank to the heat exchanger; and a direction change valve connected to the first and second water return paths to change the direction of the heating water returned from the heating pipe so that it is transferred directly to the heat exchanger or via a water tank.

The first water return path is connected to the lower part of the water tank and the outlet of the heating pipe, and the second water return path is connected to the lower part of the heat exchanger and the lower part of the water tank.

Directional valves are four-way valves.

The heating boiler according to a preferred embodiment of the present invention further includes a bypass path connecting the first and second water return paths, and the direction change valve includes a connection portion of the first water return path and the bypass path, a second water return path, and It is provided at each connection part of the bypass path.

At this time, the direction change valve is a three-way valve.

According to the control method of a heating boiler according to a preferred embodiment of the present invention, the water exchange mode supplies heating water returned through the outlet of the heating pipe to the heat exchanger, where the returned heating water flows into the water tank through the first water return path and is stored. Afterwards, the water storage mode is transferred to a heat exchanger through the second water return path; and an instantaneous mode in which the returned heating water is directly transferred to the heat exchanger through a direction change valve without passing through the water tank, and the water return mode is selected according to the heating conditions.

A method of controlling a heating boiler according to a preferred embodiment of the present invention includes an automatic mode in which conversion between a storage mode and an instantaneous mode is automatically performed; and a manual mode in which conversion between the storage mode and the instantaneous mode is performed manually.

In the automatic mode, the instantaneous mode or the storage mode is first set, and then automatically converted to the storage mode or the instantaneous mode.

In the automatic mode, when the boiler is restarted, the instantaneous mode is set first, and then automatically converted to the storage mode.

The automatic mode is first set to the instantaneous mode when the usage of heating water exceeds the storage capacity of the water tank, and is then automatically converted to the storage mode when the usage of heating water is less than the storage capacity of the water tank.

In the manual mode, the user predicts the amount of heating water used and manually sets the storage mode and instantaneous mode.

According to the present invention heating boiler and its control method, the following effects can be obtained.

First, according to the present invention, a storage-type supply method in which the heating water returned from the heating pipe is stored in a water tank and then supplied to a heat exchanger, and an instantaneous supply method in which the returned heating water is directly supplied to the heat exchanger without passing through the water tank. All are provided and you can select and apply them. Therefore, at the beginning of heating, the instantaneous type can be applied for rapid heating, and when the heating progresses to a certain extent, the storage type can be applied for stable heating.

In other words, in the early stages of heating, a large amount of heat is needed in a short period of time to set the target heating temperature, so by setting the instantaneous method to supply the returned heating water directly to the heat exchanger without going through the water tank, the heating water can be quickly heated and supplied. You can. In addition, when heating has progressed to a certain degree, there is no need to quickly heat the returned heating water, so by changing to a storage method that allows the returned heating water to pass through a water tank, unnecessary heat loss can be reduced and heating water can be supplied stably. .

Second, according to the present invention, the heating water heated in the heat exchanger is stored in the water tank and then supplied to the heating pipe, and the heating return water returned from the hot water pipe is also stored in the water tank and then supplied to the heat exchanger. Therefore, because the water tank acts as a buffer tank in the circulation process of heating water, the pressure load on the heat exchanger, heating pipes, and various pipes can be reduced to minimize concerns about water leaks and breakdowns, and to ensure smooth circulation of heating water. This can improve heating efficiency.

Third, according to the present invention, the instantaneous mode and storage mode that constitute the water return mode are set and applied to automatic or manual mode depending on the situation, so that not only is it possible to supply heating water suited to the situation, but also the heating efficiency is improved. This can be done and unnecessary energy consumption can be reduced. In other words, the efficiency of the boiler can be maximized.

1 is an overall open view of a heating boiler according to a first embodiment of the present invention.
Figure 2 is a diagram showing the appearance of a heating boiler according to a first embodiment of the present invention.
Figure 3 is a diagram showing the water tank shown in Figure 2.
Figure 4 is an exploded perspective view of Figure 3.
Figure 5 is a diagram showing the storage mode of the heating boiler according to the first embodiment of the present invention.
Figure 6 is a diagram showing the instantaneous mode of the heating boiler according to the first embodiment of the present invention.
Figure 7 is a flowchart showing the process of controlling a heating boiler according to the first embodiment of the present invention.
Figure 8 is an overall opening diagram of a heating boiler according to a second embodiment of the present invention.
Figure 9 is a diagram showing the flow when heating water returned from the heating pipe in Figure 8 is supplied to the annual exchanger.

Hereinafter, a heating boiler and its control method according to preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

The attached Figure 1 is an overall opening diagram of a heating boiler according to a first embodiment of the present invention, and Figure 2 is a diagram showing the external appearance of a heating boiler according to a first embodiment of the present invention.

The heating boiler according to the first embodiment of the present invention includes a combustor 10, a heat exchanger 20, a water tank 30, first and second connection pipes 40 and 50, a heating water supply pipe 60, It includes a heating water return pipe (70) and a direction change valve (80).

The combustor 10 generates high-temperature combustion gas by burning fuel such as gas or oil supplied from the outside. This combustor 10 is surrounded by a heat exchanger 20 and discharges high temperature combustion gas in all directions.

The heat exchanger 20 exchanges heat between the high-temperature combustion gas supplied from the combustor 10 and the heating water. The combustor 10 is installed therein and is generally formed in a cylindrical shape. In the heat exchanger 20, the heating water moves from the lower part to the upper part and is heated while exchanging heat with the high-temperature combustion gas.

The water tank 30 is located next to the heat exchanger 20 and is formed in a cylindrical shape. An empty space is formed inside the water tank 30 to accommodate heating water.

The first connection pipe 40 is connected to the upper part of the heat exchanger 20 and the upper part of the water tank 30, so that the high-temperature heating water generated inside the heat exchanger 20 flows from the upper part of the heat exchanger 20 to the water tank ( Transfer to the upper part of 30).

The second connection pipe 50 is connected to the lower part of the heat exchanger 20 and the lower part of the water tank 30, and transfers low-temperature heating water from the lower part of the water tank 30 to the lower part of the heat exchanger 20.

The heating water supply pipe 60 is connected to the upper part of the water tank 30 and to the inlet side of the heating pipe, and supplies high-temperature heating water to the heating pipe.

The heating water return pipe 70 is connected to the lower part of the water tank 30 and to the outlet side of the heating pipe, and returns low-temperature heating water via the heating pipe to the water tank 30.

When the path that supplies the heating water returned through the outlet of the heating pipe to the heat exchanger 20 is called the water return path, the path between the heating pipe and the water tank 30 is called the first water return path, and the water tank 30 ) and the heat exchanger 20 are called the second water exchange path. The first water return path includes a heating water return pipe (70), and the second water return path includes a second connection pipe (50).

The direction change valve 80 is connected to the second connection pipe 50 and the heating water return pipe 70 from the outside of the water tank 30, and directs the flow of heating water returned through the outlet of the heating pipe to the water tank. (30) or change the direction to the heat exchanger (20). A four-way valve may be used as this direction change valve 80.

Two heating water return modes can be implemented in which the heating water returned through the direction change valve 80 is supplied to the heat exchanger 20, and these can be operated selectively. That is, the heating water return mode is a storage mode in which the returned heating water is stored in the water tank 30 and then supplied to the heat exchanger 20, and the heating water is supplied directly to the heat exchanger 20 without passing through the water tank 30. It consists of an instantaneous mode.

When it is desired to raise the heating water to the target temperature in a short period of time, an instantaneous mode can be applied in which the returned heating water is supplied directly to the heat exchanger 20 without passing through the water tank 30.

That is, when the low-temperature heating water returned from the heating pipe is supplied directly to the heat exchanger 20 without flowing into the water tank 30, the low-temperature heating water from which the high-temperature heating water stored in the water tank 30 is returned is Because it does not mix and can maintain a relatively high temperature, the temperature of the heating water supplied through the heating pipes can be raised. Therefore, the heating temperature can be raised quickly.

Reference numeral 90 is a first heating water circulation pump that is connected to the second connection pipe 50 and circulates heating water between the heat exchanger 20 and the water tank 30. The unexplained reference numeral 100 is a second heating water circulation pump that generates a heating water flow between the water tank 30 and the heating pipe.

Meanwhile, let's take another look at the heating water circulation structure between the heat exchanger 20 and the water tank 30, and between the water tank 30 and the heating pipe.

The heating water in the heat exchanger 20 is heated to hundreds of degrees and then flows into the upper part of the water tank 30 through the first connection pipe 40. Heating water that has lost its heat while flowing through the heating pipe flows into the lower part of the water tank 30 through the heating water return pipe 70.

While heating is performed, heating water continuously circulates between the heat exchanger 20 and the water tank 30, and between the water tank 30 and the heating pipe. Therefore, the high temperature heating water flowing into the upper part of the water tank 30 and the low temperature heating water flowing into the lower part of the water tank 30 are mixed to a certain extent and affect each other's temperatures to a certain extent.

Heating water circulation between the water tank 30 and the heating pipe is performed by the second heating water circulation pump. At this time, the heating water heated in the heat exchanger 20 is stored in the water tank 30 and then supplied to the heating pipe, so that the water tank 30 functions as a buffer tank.

That is, if the high-temperature heating water generated in the heat exchanger 20 is supplied to the heating pipes without passing through the water tank 30, not only is the heating water not circulated smoothly due to the large pressure load, but there is also a risk of water leakage from the heating pipes. . On the other hand, in the present invention, since the water tank 30 is provided as a buffer tank, the pressure load transmitted to the heating piping is reduced, so that not only is the heating water circulated smoothly, but also the risk of water leakage is reduced.

In addition, heating water is circulated between the water tank 30 and the heat exchanger 20 by the first heating water circulation pump. The water tank 30 also serves as a buffer tank in the process of supplying heating water to the heat exchanger 20.

In short, if heating water flows without the water tank 30, the large pressure load formed through the first and second heating water circulation pumps is directly applied to the heating pipes, the heat exchanger 20, and various pipes, thereby causing the heating water to flow. Not only does circulation not occur smoothly, but the large pressure load increases the risk of water leaks, shortens the lifespan of the devices, and increases the risk of breakdown.

By storing circulating heating water in the water tank 30, which has a relatively large capacity compared to the pipes, the pressure load on the heating pipes, heat exchanger 20, and pipes is reduced.

Therefore, as described above, since it is necessary to heat to the target temperature in a short period of time at the beginning of heating, even if an instantaneous mode is applied in which the returned heating water is directly supplied to the heat exchanger 20 without passing through the water tank 30, When the heating temperature reaches the target temperature, it is necessary to switch to the storage mode in which the returned heating water is supplied to the heat exchanger 20 through the water tank 30.

FIG. 3 of the attached drawings is a view showing the water tank shown in FIG. 2, and FIG. 4 is an exploded perspective view of FIG. 3.

As shown in FIG. 3, the water tank 30 includes a cylindrical body 31, an upper diameter plate 32, and a lower diameter plate 33.

The body 31 has an empty space inside so that heating water can be stored, and on the side, first and second connector coupling holes 31a and 31b are connected to the first and second connectors 40 and 50, respectively. ) is formed. The first connector coupling hole 31a is formed on the upper side and the second connector coupling hole 31b is formed on the lower side.

The upper mirror plate 32 seals the open top of the body 31, and the heating water supply pipe 60 is connected to form a heating water discharge hole 32a through which heating water is discharged.

The lower plate 33 seals the open lower end of the body 31, and the heating water return pipe 70 is connected to form a heating water return hole 33a through which the heating water is returned.

Reference numeral 34 is a heating adapter provided on the upper surface of the upper mirror plate 32 to connect the heating water supply pipe 60 to the heating water discharge hole 31a of the upper mirror plate 32.

Reference numeral 35 is a water return adapter provided on the bottom of the lower plate 33 to connect the heating water return pipe 70 to the heating water return hole 33a of the lower plate 33.

FIG. 5 of the attached drawings is a view showing the storage mode of the heating boiler according to the first embodiment of the present invention, and FIG. 6 is a view showing the instantaneous mode of the heating boiler according to the first embodiment of the present invention.

Here, the storage mode according to FIG. 5 is a heating water supply method in which heating water returned from the heating pipe is stored in the water tank 30 and then supplied to the heat exchanger 20, and the instantaneous mode according to FIG. This is a heating water supply method in which the returned heating water is supplied by bypassing the heat exchanger (20) without passing through the water tank (30).

According to the storage mode, as shown in FIG. 5, the two balls 81 constituting the direction change valve 80 form a passage directly connecting the heating water return pipe 70 and the second connection pipe 50. Because of the blocking, the heating water returned from the heating pipe flows into the water tank 30 through the heating water return pipe 70 and then is supplied to the heat exchanger 20 through the second connection pipe 50.

According to the instantaneous mode, as shown in FIG. 6, the two balls 81 constituting the direction change valve 80 each block the passage leading to the water tank 30, so the heating returned from the heating pipe Water is supplied directly to the heat exchanger (20) without going through the water tank (30).

Figure 7 of the attached drawings is a flowchart showing a process for controlling a heating boiler according to the first embodiment of the present invention.

As shown, the process of controlling the heating boiler according to the first embodiment of the present invention includes selecting one of the manual mode and the automatic mode (S10), and selecting one of the instantaneous mode and the storage mode. It includes steps (S20), (S30) (S40).

The user turns on the heating boiler according to the present invention and selects a water return mode that supplies heating water to the heat exchanger 20. Before that, it is first decided whether to manually or automatically select the instantaneous mode and the storage mode. It is done (S10).

If the manual mode is selected, the user directly predicts the use of heating water and selects the instantaneous mode and the storage mode according to usage (S20). For example, if it is necessary to increase the heating temperature in a short period of time, the instantaneous mode is selected, and if not, the storage mode is selected.

When you select automatic mode, instantaneous mode and storage mode are automatically switched. At this time, depending on the situation, you can set it to apply the instantaneous mode first and then convert to the storage mode, or you can set it to apply the storage mode first and then convert to the instantaneous mode, and the instantaneous mode and the storage mode are converted repeatedly. You can also set it to be.

For example, when the boiler is not used for a long time (the boiler is turned off or set to out mode) and then restarted to heat, the instantaneous mode is applied first (S30) as shown in FIG. 7, and then the storage mode is applied. You can set it to be automatically converted (S40). In other words, when restarting the boiler, heating water can be supplied quickly by applying the instantaneous mode first, and then by switching to the storage mode, heating water can be supplied stably. These settings and conversions can be set to occur automatically. there is.

Meanwhile, when the amount of heating water used exceeds the storage capacity of the water tank, the instantaneous mode can be automatically set, and when the amount of heating water used is less than the storage capacity of the water tank, it can be set to automatically switch to the storage mode.

Figure 8 of the attached drawings is an overall opening diagram of a heating boiler according to a second embodiment of the present invention, and Figure 9 is a diagram showing the flow when heating water returned from the heating pipe in Figure 8 is supplied to the heat exchanger.

The heating boiler according to the second embodiment of the present invention includes a bypass pipe 110 connecting the second connection pipe 50 and the heating water return pipe 70, and the second connection pipe 50 and the bypass pipe. It includes direction change valves 120 and 121 respectively mounted on the connection part of 110 and the connection part of the heating water return pipe 70 and the bypass pipe 110. At this time, a three-way valve may be used as the direction change valve (120) (121).

According to the first and second direction switching valves 120 and 121, the heating water returned through the heating water return pipe 70 is not bypassed according to the position of the ball (not shown) provided inside, as shown in FIG. 9. As in (a), the storage mode supplies water to the heat exchanger 20 through the water tank 30, and the bypass pipe 110 without going through the water tank 30 as in (b) of FIG. 9. It can be changed to an instantaneous mode that bypasses to the heat exchanger (20).

As described above, the heating boiler and its control method according to preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments and may be modified in various ways within the scope of the patent claims. It can be implemented.

10: combustor 20: heat exchanger
30: water tank 31: body
32: upper cervical plate 33: lower cervical plate
34: Heating adapter 35: Water return adapter
40: first connector 50: second connector
60: Heating water supply pipe 70: Heating water return pipe
80: direction change valve 90: first heating water circulation pump
100: Second heating water circulation pump 110: Bypass pipe
120, 121: Directional valve

Claims (12)

In a boiler that stores heating water heated in a heat exchanger in a water tank and supplies it to heating pipes for heating,
a first water return path that connects the outlet of the water tank and the heating pipe to return heating water via the heating pipe to the water tank;
a second water return path that connects the heat exchanger and a water tank to return heating water for heating from the water tank to the heat exchanger;
A direction change valve connected to the first and second water return paths and changing the direction so that the heating water returned from the heating pipe is directly transferred to the heat exchanger or is transferred via the water tank.
heating boiler According to claim 1,
The first water return path is connected to the lower part of the water tank and the outlet of the heating pipe, and the second water return path is connected to the lower part of the heat exchanger and the lower part of the water tank,
Heating boiler. According to claim 1,
Characterized in that the direction change valve is a four-way valve,
Heating boiler. According to claim 1,
It further includes a bypass path connecting the first and second water return paths,
Characterized in that the direction change valve is provided at a connection portion of the first water return path and the bypass path, and a connection portion of the second water return path and the bypass path, respectively.
Heating boiler. According to claim 4,
Characterized in that the direction change valve is a three-way valve,
Heating boiler. A method for controlling the heating boiler of any one of claims 1 to 5. According to claim 6,
The water return mode supplies heating water returned through the outlet of the heating pipe to the heat exchanger,
a storage mode in which returned heating water flows into and is stored in the water tank through the first water return path and is then transferred to the heat exchanger through the second water return path; and
Including an instantaneous mode in which the returned heating water is directly transferred to the heat exchanger through the direction change valve without passing through the water tank,
Characterized in that the water return mode is selected and applied according to heating conditions,
Control methods of heating boilers. According to claim 7,
An automatic mode in which the conversion between the storage mode and the instantaneous mode is automatically performed; and
Further comprising a manual mode in which conversion between the storage mode and the instantaneous mode is performed manually,
Control methods of heating boilers. According to claim 8,
The automatic mode is,
Characterized in that the instantaneous mode or the storage mode is first set, and then automatically converted to the storage mode or the instantaneous mode,
Control methods of heating boilers According to clause 9,
The automatic mode is,
Characterized in that when the boiler is restarted, the instantaneous mode is first set and then automatically converted to the storage mode,
Control methods of heating boilers. According to clause 9,
The automatic mode is,
When the amount of heating water used exceeds the storage capacity of the water tank, the instantaneous mode is first set, and then when the amount of heating water used is less than the storage capacity of the water tank, the mode is automatically converted to storage mode,
Control methods of heating boilers. According to claim 8,
The manual mode is,
Characterized in that the user predicts the amount of heating water used and manually sets the storage mode and instantaneous mode,
Control methods of heating boilers.

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