KR102062836B1 - Method for controlling the temperature of boiler circulating water and the boiler thereof - Google Patents

Abstract

The present invention relates to a boiler circulating water temperature control method and a boiler using the same, the boiler circulating water temperature control method according to an embodiment of the present invention, by receiving a hot water tapping signal from the flow sensor, the boiler in the heating mode hot water mode Switching to; Receiving room temperature information of the hot water pipe, and determining whether the received room temperature information of the hot water pipe meets a preset condition; If the received room temperature information of the hot water pipe line satisfies a predetermined condition, closing the solenoid valve installed in the direct water line and heating the temperature of the circulating water to a predetermined temperature; Setting the tapping period of the heated circulating water by combining the room temperature information of the hot water pipe, the length of the hot water pipe, the atmospheric temperature, and the user set temperature; And tapping hot water during the determined tapping period, and tapping at a temperature set by a user after the tapping period. Further, when the hot water is stopped, preheating the temperature of the circulating water to t2 or more; When the circulating water temperature falls below a predetermined temperature because no hot water is used, the method may further include automatically switching from the boiler hot water mode to the heating mode.

Description

Boiler Circulating Water Temperature Control Method and Boiler Using the Same {METHOD FOR CONTROLLING THE TEMPERATURE OF BOILER CIRCULATING WATER AND THE BOILER THEREOF}

The present invention relates to a boiler circulating water temperature control method and a boiler using the same, more specifically, when hot water is used in a state in which the water in the hot water pipe or the temperature of the circulating water is low, the hot water discharged quickly having a desired temperature It is about boiler circulating water temperature control method and boiler using the hot water which can be used without hot water in the middle of using hot water when enabling hot water and reusing it after a short time after using hot water.

After a long time after using the hot water of the boiler, not only the water in the hot water pipe but also the temperature of the circulating water in the main heat exchanger and the hot water heat exchanger are lowered. When the user uses hot water at a low temperature of the water and the circulating water in the hot water pipe, the boiler typically starts to tap the hot water to the desired temperature.

However, even if the boiler starts operation and taps water at the temperature set by the user, the tapped hot water passes through the hot water pipe in the low temperature state as it reaches the user. It is very likely that the cold water is cold, quite different from the desired temperature.

In order to tap water at a temperature desired by the user, time to be preheated by hot water passing through the hot water pipe is required, and a considerable amount of water resources are wasted during the preheating period.

In addition, when the hot water is used again after stopping the use of hot water in the shower, the cold water comes out in the middle of using the hot water makes you feel uncomfortable.

In order to solve such a problem, it is necessary to provide a boiler circulating water temperature control method and a boiler applying such a control method to shorten the period until the user taps the water of the desired temperature as much as possible and to prevent cold water from flowing in between the hot water. have.

Korean Unexamined Patent Publication KR 10-2009-0119298 (published: November 19, 2009)

The problem to be solved by the present invention is to reduce the period until the user taps the water of the desired temperature as possible and to apply the boiler circulating water temperature control method and the control method to solve the uncomfortable phenomenon that the cold water comes out in the middle of using hot water The boiler is to provide.

Boiler circulating water temperature control method according to an embodiment of the present invention, the step of receiving a hot water tapping signal from the flow sensor; Receiving room temperature information of the hot water pipe and room temperature information of the circulating water and direct water, and determining whether the received room temperature information of the hot water pipe or the room temperature information of the circulating water meets a preset condition; When the hot water is used in a state in which the received room temperature information of the hot water pipe meets a predetermined condition, the solenoid valve installed in the direct water pipe is closed, and heating the temperature of the circulating water to a preset t3 temperature without tapping cold water. ; Setting a tapping period of hot water heated to the predetermined temperature by combining room temperature information of a hot water pipe, a length of the hot water pipe, an atmospheric temperature, and a user set temperature; And tapping hot water during the determined tapping period, and tapping at a user set temperature.

The determination of whether the room temperature information of the hot water pipe meets a predetermined condition is a temperature at which the user feels uncomfortable due to the temperature drop at the time of use when tapping at the user set temperature in the boiler.

In addition, the step of closing the solenoid valve installed in the water line and heating the temperature of the circulating water to a predetermined temperature may include heating the temperature of the circulating water to t3 (where t3 is greater than t1).

In addition, after the hot water is tapped during the determined tapping period, the temperature of the circulating water is preheated at least t2 (where t2 is greater than t1 and less than t3) when the hot water is stopped so that the preheated circulating water and the direct water are heated when the hot water is used again. It may further comprise the step of preheating the circulating water so that the cold water does not come out in the middle of the use of hot water.

In addition, t0, t1, t2 is set fluidly according to the room temperature of circulating water and the room temperature of direct water. For example, t2 set in winter may be higher than t2 set in summer.

The step of setting the tapping period of the circulating water heated up to the preset temperature in consideration of room temperature information of the hot water pipe, the length of the hot water pipe, the atmospheric temperature, and the user set temperature may include: The longer the length of the hot water pipe, the lower the atmospheric temperature, and the higher the user setting temperature, the longer the tapping time can be set.

In addition, when using hot water in a state where the temperature of the circulating water is less than t2 by tapping after a certain period of time, it is possible to tap the hot water continuously.

In addition, when hot water taps, the boiler is switched from heating mode to hot water mode,

After the hot water is stopped, the boiler can switch from the hot water mode to the heating mode when the circulating water reaches t0.

In addition, after the tapping period of the t3 temperature has elapsed, tapping may be performed at a temperature selected by the user.

Boiler according to another embodiment of the present invention, a direct flow pipe and a flow sensor installed in the straight pipe, the direct pipe temperature sensor, the solenoid valve; A hot water pipe furnace temperature sensor installed in the hot water pipe furnace and the hot water pipe furnace; A hot water heat exchanger and a circulating water temperature sensor installed in the hot water heat exchanger; An air temperature sensor measuring an air temperature; And it may include a control unit for controlling the boiler circulating water temperature by applying the above-described boiler circulating water temperature control method.

Boiler circulating water temperature control method according to an embodiment of the present invention and the boiler using the same to minimize the waste of water until preheating when using hot water and to shorten the period until the water of the desired temperature is tapping.

In addition, if the hot water is used after a short time after the use of hot water, the cold water does not come out in the middle of hot water tapping, so the inconvenience in the middle of the shower is eliminated.

1 is a flow chart showing a boiler circulating water temperature control method according to an embodiment of the present invention.
Figure 2 is a schematic diagram of a boiler to which the boiler circulating water temperature control method according to an embodiment of the present invention is applied.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a flowchart showing a boiler circulating water temperature control method according to an embodiment of the present invention, Figure 2 is a schematic diagram of a boiler to which the boiler circulating water temperature control method according to an embodiment of the present invention is applied. In the boiler circulating water temperature control method according to an embodiment of the present invention, the step of receiving a hot water tapping signal from a flow sensor and switching from a boiler heating mode to a hot water mode (S100), room temperature information of a hot water pipe in real time from before using hot water and Receiving the room temperature information of the circulating water, and determining whether the room temperature information of the received hot water pipe or the room temperature information of the circulating water meets a preset condition (S200), if the room temperature information of the received hot water pipe corresponds to a preset condition In the case of receiving the hot water tapping signal in the state, the solenoid valve installed in the direct water line is closed and heating the temperature of the circulating water to a predetermined temperature (t3) (S300), the room temperature information of the hot water line, the length of the hot water line, the atmospheric temperature And setting the tapping period of the heated circulating water by synthesizing the user set temperature (S400) and tapping the hot water during the determined tapping period. And, it may include a step (S500) for the tapping to the user set temperature. Furthermore, the step of preheating the circulating water of at least t2 (where t2 is smaller than t3) when the hot water is stopped may be used (S600). In addition, the cooling water may further include the step of automatically switching from the boiler hot water mode to the heating mode when the circulating water temperature is t1 or less (S700).

In the boiler 10 to which the boiler circulating water temperature control method of the present invention is applied, the flow rate sensor 110 installed in the direct water line 100 transmits a hot water tapping signal to a controller (not shown) in response thereto.

When the hot water pipe temperature is low, when the controller receives the hot water tapping signal from the flow sensor 110 (S100), the controller locks the solenoid valve to preheat the circulating water to t3 without tapping cold water. When preheated to t3, the solenoid valve opens and taps during the t3 temperature tapping period (determined by hot water pipe temperature, hot water pipe length, user selected temperature, ambient temperature, etc.).

 Room temperature information of the hot water pipe is received from the temperature sensor 210 in the hot water pipe.

The controller determines whether the received room temperature information of the hot water pipe meets a preset condition (S200). Here, the preset condition for the room temperature information of the received hot water pipe means that the room temperature of the hot water pipe is less than t0. The determination of whether or not the room temperature information of the hot water pipe meets a predetermined condition is based on whether the temperature of the hot water pipe feels uncomfortable due to the temperature drop at the time of use when tapping at the user set temperature.

On the other hand, the temperature values t0, t1, t2 and t3 of the circulating water described below are used for solenoid control so that cold water does not come out at the beginning or the middle of tapping when the hot water is stopped and reused, respectively, and is understood to have the following meanings.

First, t0 temperature (low temperature) refers to the maximum value of the circulating water temperature range in which the preheated circulating water cools down after a long time after the use of hot water is stopped, and there is no heat exchange effect.

t1 temperature (medium temperature) means the maximum value of the temperature range of the circulating water in which the preheated circulating water cools down and the heat exchange with the direct water is not sufficiently performed, and the cold water is briefly tapped during the hot water tapping. .

t2 temperature (high temperature) is a state where the circulating water is at a high temperature, and the water is directly exchanged with the circulating water until the combustion chamber is ignited when the hot water is used, so that cold water does not come out during the hot water tapping. it means.

The t3 temperature (highest temperature) is the highest temperature set for the circulating water and means a set temperature value that can raise the temperature of the hot water pipe in a short time.

These t0, t1, t2 values can be set fluidly depending on the room temperature of the circulating water and the room temperature of the direct water, not fixed values. For example, depending on the season, the room temperature of the direct water will be different, preheat the temperature of the circulating water high in the winter when the temperature of the direct water is low, and preheat the temperature of the circulating water low in the summer when the temperature of the direct water is high, that is, set in winter The t2 may be higher than the t2 set in the summer. As such, it is automatically changed and set according to the room temperature of the circulating water and the direct water.

On the other hand, the solenoid valve 130 is installed in the direct water line is closed, the case where the direct water line temperature is matched, when the circulating water uses hot water at the temperature t1 or less.

 If hot water is used at the same temperature as the direct water pipe, the solenoid valve closes until the temperature of the circulating water is heated to t3, preventing the direct water supply. When the circulating water temperature is heated to a temperature t3, the controller transmits a solenoid opening signal to the solenoid valve 130. When the solenoid valve is opened, hot water is tapped at t3 temperature and the hot water pipe can be preheated in a short time.

Next, the control unit sets the hot water tap period (determined by the hot water pipe temperature, the hot water pipe length, the user selection temperature, the air temperature, etc.) in real time (S400). The tapping period of the t3 hot water means the time of tapping at the temperature t3 to preheat the low temperature hot water pipe. The hot water reaching the user after the tapping time of the hot water at t3 temperature satisfies the temperature range set by the user.

The period during which hot water is tapped at t3 temperature is set by combining the room temperature information of the hot water pipe, the length of the hot water pipe, the atmospheric temperature, and the user set temperature. If the tapping period of the circulating water is too short, the preheating effect of the hot water pipe cannot be expected, and if it is too long, hot water of very high temperature outside the temperature range set by the user may be tapping, and therefore, it is necessary to set it to an appropriate period.

First, the length of the tapping period is adjusted based on the room temperature information of the hot water pipe furnace obtained through the hot water pipe furnace temperature sensor 210. If the room temperature of the hot water pipe is very low below a certain temperature, it is necessary to compensate the tapping time longer than the case above a certain temperature.

In addition, the length of the hot water pipe from the place where hot water is used to the boiler varies from home to home. If the length of the hot water pipe is longer than a certain length, it is necessary to compensate the tapping period longer than the case of a certain length or more.

Typically, a user wants high hot water in winter where the air temperature is lower than in summer when the air temperature is high. Therefore, if the t3 temperature tapping period is determined based only on the temperature of the hot water pipe, the use of hot water at a desired temperature is delayed in winter, and conversely, a high temperature outside the desired temperature range may be tapped in summer. Therefore, the tapping period is corrected by reflecting the air temperature information obtained through the air temperature sensor 600 (eg, thermistor) to compensate for the temperature according to the air temperature change.

Finally, when the temperature set by the user is high, the t3 temperature tapping period is long compensated, and when the user set temperature is low, the t3 temperature tapping period is shortly compensated.

The tapping at the t3 temperature for the set period as described above and tapping at the temperature selected by the user (step S500). By tapping hot water at a temperature t3 during the set tapping period, the hot water pipe can be preheated quickly, so that hot water tapping in a temperature range desired by the user can be achieved in a short time.

If hot water is used in a state where the temperature of the circulating water is lower than t1 (S800), close the solenoid valve and supply water directly until the temperature of the circulating water is heated to t1.If the temperature of the circulating water is more than t1, the solenoid valve opens to provide hot water. Tap the water (S900).

 If the solenoid valve is not closed when hot water is used when the temperature of the circulating water is lower than t1, the circulating water cannot be preheated from the start of hot water tapping to the ignition of the boiler combustion chamber. Cold water comes out. Therefore, when cold water comes out in the middle of using hot water, close the solenoid valve at the time of using hot water to prevent direct water inflow, and hot water tapping can eliminate the phenomenon of cold water in the middle of using hot water.

If the user stops using hot water after using hot water, the control unit preheats the circulating water such that the temperature of the circulating water is greater than t2 (where t2 is greater than t1 and less than t3) (S600). To this end, when a preheating signal is input to the controller when the user of hot water is stopped, the main heat exchanger 400 preheats the circulating water through the combustion stroke, and controls the combustion stroke to stop when the circulating water is preheated t2 or more.

When hot water is used in the range of the temperature of the circulating water of t2 or more, the direct water and the circulating water are exchanged sufficiently until the combustion chamber is ignited when the hot water is used, so that the hot water can be used continuously without the cold water tapping during hot water tapping.

If hot water is used immediately after the hot water is stopped and the temperature of the circulating water is preheated over t2, hot water higher than the temperature selected by the user may be used depending on the temperature of the hot water pipe. Therefore, when hot water is used when the temperature of the circulating water is more than t2, the circulating motor starts at the temperature selected by the user.

In addition, the control unit switches the boiler from the heating mode to the hot water mode at the time of hot water tapping and maintains the hot water mode of the boiler, but when the user finishes using the hot water and the circulating water is lowered to a predetermined temperature (t0), the boiler is heated in the hot water mode. Automatically switch to mode (S700).

According to the boiler circulating water temperature control method according to an embodiment of the present invention, by installing the solenoid valve 130 in the direct water pipe (100), hot water in a state where the temperature of the water and the circulating water in the hot water pipe 200 is low By using, the solenoid valve 130 installed in the water pipe 100 is not closed by tapping the water of cold temperature, preheating the circulating water to the highest set temperature, and then tapping the hot water, the hot water pipe 200 Preheating quickly and hot water tapping within the desired temperature range within a short period of time, it is possible to prevent the waste of water resources.

Figure 2 is a schematic diagram of a boiler to which the boiler circulating water temperature control method according to an embodiment of the present invention is applied.

Boiler according to another embodiment of the present invention, the direct flow pipe 100 and the flow rate sensor 110, the straight pipe temperature sensor 120, the solenoid valve 130 installed in the straight pipe passage; A hot water pipe line 200 and a hot water pipe line temperature sensor 210 installed in the hot water pipe line; A hot water heat exchanger 300 and a circulating water temperature sensor 310 installed in the hot water heat exchanger; An atmospheric temperature sensor 600 for measuring the atmospheric temperature; And it may include a controller (not shown) for controlling the boiler circulating water temperature by applying the above-described boiler circulating water temperature control method.

On the other hand, the term '~ part' used in this embodiment, that is, the '~ module' or '~ table' and the like are used as software, hardware such as FPGA (Field Programmable Gate Array) or Application Specific Integrated Circuit (ASIC). A component, a module performs some function. However, modules are not meant to be limited to software or hardware. The module may be configured to be in an addressable storage medium and may be configured to play one or more processors. Thus, as an example, a module may include components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, subroutines. , Segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and modules may be combined into a smaller number of components and modules or further separated into additional components and modules. In addition, the components and modules may be implemented to reproduce one or more CPUs in a device.

For the operation and technical effects of the boiler according to another embodiment of the present invention, reference may be made to the above description of the boiler circulating water temperature control method and an embodiment of the present invention, and FIG. 1, and the detailed description is repeated. It will be omitted to avoid.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

10: boiler
100: straight pipe
110: flow sensor
120: direct pipe temperature sensor
130: solenoid valve
200: with hot water pipe
210: hot water pipe temperature sensor
300: hot water heat exchanger
310: circulating water temperature sensor
400: main heat exchanger
410: combustion engine
500: circulating pump
600: ambient temperature sensor
700: trilateral

Claims (9)

Receiving a hot water tapping signal from a flow sensor;
Receiving room temperature information of the hot water pipe, and determining whether the received room temperature information of the hot water pipe meets a preset condition;
If the received room temperature information of the hot water pipe line satisfies a preset condition, closing the solenoid valve installed in the direct water line and heating the temperature of the circulating water to a predetermined temperature;
Setting a tapping period of the circulating water heated to the predetermined temperature by combining room temperature information of the hot water pipe, the length of the hot water pipe, the atmospheric temperature, and a user set temperature;
Tapping hot water at a preset temperature during the determined tapping period, and then tapping hot water at a user set temperature;
When hot water taps, switch the boiler from heating mode to hot water mode,
After the use of hot water, when the temperature of the circulating water becomes t0 (where t0 is less than t1), the boiler is switched from the hot water mode to the heating mode, boiler circulating water temperature control method. The method of claim 1,
The step of closing the solenoid valve installed in the water pipeline and heating the temperature of the circulating water to a predetermined temperature,
The boiler circulating water temperature control method of heating the temperature of the circulating water to t3 (where t3 is greater than t1). The method of claim 2,
After tapping hot water during the determined tapping period,
And preheating the circulating water at a temperature of the circulating water of t2 (where t2 is greater than t1 and less than t3) when the hot water is stopped using. delete The method of claim 3,
T2, which is set in winter, is larger than t2, which is set in summer. The method of claim 1,
The step of setting the tapping period of the circulating water heated up to the preset temperature by combining the room temperature information of the hot water pipe, the length of the hot water pipe, the atmospheric temperature, and the user set temperature,
The boiler circulating water temperature control method of setting the tapping time longer as the room temperature of the hot water pipe is lower, the length of the hot water pipe is longer, the atmospheric temperature is lower, and the user setting temperature is higher. The method of claim 3,
When hot water is used while the temperature of the circulating water is less than t2, the hot water is continuously heated by tapping after a certain period of time has elapsed. The method of claim 3,
t0, t1, t2 are fluidly set according to the room temperature of direct water. A flow rate sensor installed in the water line and the water line, a water line temperature sensor, and a solenoid valve;
A hot water pipe furnace temperature sensor installed in the hot water pipe furnace and the hot water pipe furnace;
A hot water heat exchanger and a circulating water temperature sensor installed in the hot water heat exchanger;
An air temperature sensor measuring an air temperature; And
A boiler comprising a control unit for controlling the boiler circulating water temperature by applying the method according to any one of claims 1 to 3 and 5 to 8.

Images