WO2019054605A1

WO2019054605A1 - Automatic determination control method for efficient hot water preheating time according to installation environment

Info

Publication number: WO2019054605A1
Application number: PCT/KR2018/006446
Authority: WO
Inventors: 이은억
Original assignee: 주식회사 경동원
Priority date: 2017-09-14
Filing date: 2018-06-07
Publication date: 2019-03-21
Also published as: KR20190030426A; KR102145036B1

Abstract

The purpose of the present invention is to provide an automatic determination control method for efficient hot water preheating time according to an installation environment, which can improve the efficiency of hot water preheating and minimize unnecessary energy loss by deriving and applying optimal hot water preheating operation time and preheating standby time according to an installation environment of a hot water supply device. To this end, the present invention is configured to comprise: a hot water preheating operation time determination step for counting the time from the time when hot water preheating is operated to the time when a return water temperature reaches a reference temperature and is stabilized and determining the time as a hot water preheating operation time; and a hot water preheating standby time determination step for, after stopping hot water preheating and standing by for preheating during a temporarily stored hot water preheating standby time, measuring the return water temperature when a predetermined time elapses after re-performing preheating, and when the return water temperature is within a predicted reference temperature range, determining the temporarily stored hot water preheating standby time as a hot water preheating standby time.

Description

Efficient control method of hot water preheating time based on installation environment

More particularly, the present invention relates to an automatic warm-up preheat time control method and a control method thereof, and more particularly, And more particularly, to an automatic hot water preheating time control method according to an installation environment capable of increasing the efficiency of hot water preheating and minimizing unnecessary energy loss.

The hot water supply device is a device for heating hot water to a set temperature within a short time and supplying the hot water to the user conveniently.

The hot water supply device is configured to burn oil through a burner using oil or gas as a fuel, heat the water using the heat of combustion generated in the burning process, and provide the heated water according to the user's need .

As the user opens the hot water valve to use the hot water and the hot water operation is operated and the hot water is heated to the proper temperature, the cold water is discharged through the hot water outlet and is discarded as it is. This causes waste of water energy, There is a problem that the use of hot water is inconvenient.

In order to solve such a problem, a hot water supply device having a hot water preheating function has recently been developed and used.

In the conventional hot water supply apparatus, the hot water preheating is performed in the following two embodiments.

One embodiment of the hot water preheating is a method in which the warmer operation time and the preheating standby time are set by the installer or the user of the hot water supply device to perform the preheating periodically.

In the case of performing the hot water preheating by this method, it is necessary to accurately grasp the installation environment and to apply it in setting the preheating operation time and the preheating waiting time, and it is necessary to accurately determine the preheating operation time and the preheating waiting time There is a problem that excessively preheating is performed to cause waste of energy or to carry out an incomplete preheating, leading to dissatisfaction with the preheating performance.

Another embodiment of the hot water preheating is a method of performing preheating by circulating the hot water preheating pipe and turning on / off the preheating according to the water temperature of the water that is returned to the heat exchanger of the water heater. When the hot water preheating is performed by this method, since the hot water preheating is performed based only on the return water temperature information sensed by the temperature sensor, the ON / OFF operation of the preheating operation is frequently performed, , There is a problem that the preheating operation can be performed in a manner incompatible with the installation environment of the actual pipe.

Background Art [0002] Prior art relating to a hot water preheating method of a conventional hot water supply device is disclosed in Patent No. 10-1598538 and Patent No. 10-0422856.

The hot water preheating method disclosed in the above Patent No. 10-1598538 is configured to repeatedly perform the hot water preheating and the hot water preheating atmosphere for a predetermined time period, and the hot water preheating method disclosed in the above-mentioned Japanese Patent No. 10-0498538, The hot water preheating combustion operation is performed when the temperature of the water detected by the temperature sensor installed in the outdoor unit is lower than the hot water preheating set temperature, and the warm preheating combustion operation is performed when the temperature is higher than or equal to the predetermined temperature.

However, in the case of the above prior arts, since the user sets the warm-up preheating time and the waiting time or sets the preheating operation and the waiting time based only on the temperature information of the water detected by the temperature sensor, There is a limit in that the preheating operation time and the preheating waiting time of the hot water preheating unit can not be optimized. As a result, the efficiency of hot water preheating deteriorates and unnecessary energy loss is caused.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot water preheating apparatus and a hot water preheating apparatus which can improve the efficiency of hot water preheating and minimize unnecessary energy loss And an object of the present invention is to provide an automatic hot water preheating time automatic determination control method according to an installation environment that can be performed.

According to another aspect of the present invention, there is provided an automatic hot water preheating time control method for a hot water preheating time control system for a hot water preheating system, the method comprising the steps of: Determining a hot water preheating operation time determined as a time; The hot water preheating is stopped and the preheating standby time is preheated for a preheated hot water preheating wait time, and then the temperature of the circulating water at a predetermined time after the preheating material is performed is measured. If the circulating water temperature is within the predicted reference temperature range, And a warm water preheating wait time determination step of determining the warm water preheating wait time.

And the preheating operation time may be counted from a time point at which the hot water outlet temperature after the hot water preheating operation reaches the set temperature in the hot water preheating operation time determining step.

The hot water preheat operation time determination step may be configured to count the hot water preheat operation time from the operation start point of the pump according to the hot water preheating operation.

Wherein the stabilizing time at which the water-return temperature is maintained within the set convergence temperature from the point at which the water-return temperature reaches the reference temperature is counted in the step of determining the hot water preheating operation time, and the counted stabilization time exceeds the stabilization reference time And determining the preheating operation time in the case of performing the preheating operation.

Wherein the control unit counts the time at which the water return temperature reaches a predetermined temperature or more from the time when the water return temperature reaches the reference temperature at the step of determining the warm water preheating operation time and if the counted temperature arrival time exceeds the temperature arrival determination reference time And determining the preheating operation time in the case where the preheating operation time is shorter than the preheating operation time.

The predetermined time after the preheating material is determined is a pipe intermediate temperature determination time of the hot water preheating circulation pipe in the step of determining the hot water preheating wait time and when the pipe intermediate temperature determination time reaches the pipe intermediate temperature determination reference time, And the like.

If the water temperature is lower than the lower limit of the pipe intermediate reference temperature, the temporarily stored hot water preheating waiting time is reduced by a predetermined time to temporarily store the corrected hot water preheating waiting time. If the water return temperature is higher than the upper limit And temporarily storing the warmed-up preheating wait time corrected by increasing the preheated warm-up preheating wait time by a predetermined time.

Further comprising a hot water preheating operation time update step of initializing the preheating operation time reestablishment count count when the recirculated water temperature reaches the upper limit with the lower limit of the preheat water recirculation reference temperature after the counted preheating operation time reaches the preheating reference time .

The preheating operation time re-judgment count count is added once if the recirculated water temperature is higher than the upper limit of the preheating rehabilitation reference temperature before the counted preheating operation time reaches the preheating reference time, and the counted preheating operation time re- And a warm-up preheat operation time update step of initializing the preheat operation time when the reference number is exceeded.

If the counted preheating operation time reaches the preheating reference time and the recycling temperature is lower than the lower limit of the preheating regeneration reference temperature, the preheating operation time re-judgment count count is added once, and the counted preheating operation time re- And a warm-up preheat operation time update step of initializing the preheat operation time when the number of times of the preheating operation exceeds the reference number of times.

When the temperature of the piping intermediate temperature is equal to the lower limit of the piping intermediate prediction reference temperature when the piping intermediate temperature judgment time reaches the pipe intermediate temperature judgment reference time at the time of performing the preheating, And may further include a time update step.

Wherein when the piping intermediate temperature judgment time reaches the pipe intermediate temperature judgment reference time at the time of performing the preheating and the water return temperature is lower than the lower limit of the piping intermediate predicted reference temperature, the preheating waiting time counting count count is added once, And a warm-up preheating wait time updating step of initializing a warm-up wait time when a preheating wait time re-judgment count exceeds a reference count.

When the pipe intermediate temperature judgment time reaches the piping intermediate temperature judgment reference time at the time of performing the preheating and the return water temperature is higher than the upper limit of the piping intermediate predicted reference temperature, the preheating waiting time counting count count is added once, And a warm-up preheating wait time updating step of initializing the warm-up wait time when the number of warm-up wait time re-determination exceeds the reference number.

According to the automatic hot water preheating time control method according to the present invention, it is possible to automatically determine and apply the preheating operation time and the preheating standby time according to the installation environment of the hot water supply device, It is possible to increase the efficiency of hot water preheating, prevent unnecessary energy consumption, and improve the reliability of the hot water preheating function. In addition, efficient preheating is possible by automatically responding to temperature environment changes such as installation environment and seasons.

1 is a configuration diagram of a hot water supply apparatus having a hot water preheating function to which the present invention is applied,

FIG. 2 is a flowchart of a preheating operation time determination method according to the present invention,

FIG. 3 is a flowchart of a warm-up waiting time determination method according to the present invention,

4 is a flowchart of a preheat operation time update method according to the present invention;

5 is a flowchart of a warm-up waiting time update method according to the present invention.

** Explanation of symbols **

1: hot water supply device 10: water heater

21: direct water pipe 22: direct water pipe for water heater

23: Water heater internal hot water tube 24: Hot water preheating circulator tube

25: water outlet side water pipe 30: heat exchanger

40: faucet 50: flow sensor

60: water temperature sensor 70: outlet temperature sensor

80: Pump

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, a hot water supply apparatus 1 having a hot water preheating function according to the present invention includes a water heater 10 for heating hot water to supply hot water, a direct water pipe for supplying hot water to the water heater 10, A heat exchanger 30 for generating hot water by heating the direct water flowing through the water pipe 21, the water pipe internal water pipe 22 and the water pipe internal water pipe 22 by the combustion heat of the burner, A hot water internal hot water pipe 23 for supplying heated hot water to the power receiver 40 and a hot water preheating circulation pipe 24 for connecting the hot water internal hot water pipe 23 and the direct water pipe 21 to form a hot water circulation channel An outlet side water supply pipe 25 for supplying direct water from the direct water pipe 21 to the water receiving side 40, a flow rate sensor 50 for sensing the flow amount of the direct water to be introduced, A water temperature sensor 60 for detecting the temperature of water to be returned to the water heat exchanger 30, Is provided in the port side is configured to include a pump 80 for circulating the water to the outlet temperature sensor 70, and pre-heating of the water for detecting the temperature of the water supplied. The pump 80 may be disposed inside the water heater 10 as shown in FIG. 1, or may be disposed outside the water heater 10.

Hereinafter, an efficient method of controlling hot water preheating time according to an installation environment according to the present invention will be described with reference to FIGS. 2 to 5. FIG.

The method for automatically determining hot water preheating time according to the installation environment of the present invention is characterized in that it comprises the steps of counting the time from when the hot water preheating operation is started until the return water temperature reaches and stabilizes to the reference temperature to determine the hot water preheating operation time A preheating step of waiting for a preheated hot water preheating time after stopping the hot water preheating, measuring the temperature of the circulating water at a predetermined time after the preheating material is performed, And a warm-up preheating wait time determining step of determining the waiting time as the warm-up preheating wait time.

The method further includes a hot water preheat operation time update step for correcting the hot water preheat operation time according to the installation environment and a hot water preheating wait time update step for correcting the hot water preheat wait time according to the installation environment.

Hereinafter, a hot water preheating time determination method, a hot water preheating time determination method, a hot water preheating time update method, and a hot water preheating wait time update method constituting an efficient hot water preheating time control method according to an installation environment according to the present invention will be described below. This is explained sequentially.

Referring to FIG. 2, when the initial warm water preheating is started, the pump 80 is operated for preheating circulation of the hot water, and combustion in the heat exchanger 30 is performed (S101).

In step S102, it is determined whether the hot water outlet temperature sensed by the outlet temperature sensor 70 reaches a predetermined temperature or not when the pump 80 is warmed up by preheating in the state where the preheating operation time is not established or initialized.

The preheating operation time is counted from the time when the hot water outlet temperature reaches the set temperature (S103). In another embodiment, the preheating operation time may be configured to count from the time when the pump 80 is started.

Next, in step S104, it is determined whether or not the temperature of the return water sensed by the water-return temperature sensor 60 rises and the temperature change is maintained within a predetermined range within a predetermined time and stabilized. However, if the return temperature does not exceed the minimum reference temperature, the stabilization is not judged. This is to prevent the water in the pipe from being misunderstood as being stabilized even though the water in the pipe is not reaching the minimum reference temperature when the water moves to the return water.

The stabilization time at which the water-circulation temperature is maintained within the set convergence temperature from the stabilization determination time is counted (S105).

Then, the stabilization time counted and the stabilization reference time are compared (S106). The stabilization reference time may be set to a predetermined time, and may be set to a time that can be determined to be stabilized when the stabilization time is maintained without fluctuation during the stabilization reference time. If the counted stabilization time exceeds the stabilization reference time, it is determined that the water return temperature has converged and stabilized within a predetermined temperature range, and the preheating operation time is determined (S107), and the preheating is finished.

In another embodiment of the present invention, the time when the return water temperature reaches the predetermined temperature or more from the time when the water return temperature reaches the reference temperature is counted, and when the counted temperature arrival time exceeds the temperature arrival judgment reference time, And determining the operation time. That is, when the counted temperature arrival time exceeds the temperature arrival judgment reference time, it can be determined that the change in temperature rise is not large and stabilized. The reference temperature may be a preheated hot water temperature set by the user.

Referring to FIG. 3, when the warm-up operation is completed, the warm-up waiting time is counted (S201). It is determined whether the counted warm-up wait time has reached the pre-stored warm-up wait time (S202). The temporarily stored warm-up waiting time may be set to an initial warm-up waiting time or a warm-up waiting time previously applied.

When the counted warm-up wait time reaches the pre-stored warm-up wait time, the preheat is restarted (S203).

Then, the piping intermediate temperature determination time is counted (S204). The piping intermediate temperature determination time is required for the preheated hot water, which is about midway of the entire pipe length of the hot water preheating circulation pipe 24, to reach the position where the water temperature sensor 60 is provided This is to measure the return temperature based on the average temperature value of the preheated hot water flowing in the whole pipe.

Next, it is determined whether the piping intermediate temperature judgment time reaches the piping intermediate temperature judgment reference time (S205). Here, the pipe intermediate temperature determination reference time is a time during which the water located at the outlet side of the heat exchanger (30) flows through the heat exchanger (30) through the hot water outlet temperature and the water temperature change during the combustion of the burner by the preheating and the operation of the pump The time taken to reach the inlet side of the heat exchanger 30 is derived and the time derived is divided by half so that the water in the middle of the

pipes

23, 24, 22 reaches the outlet side position of the heat exchanger 30 As shown in FIG.

If the piping intermediate temperature judgment time reaches the set pipe middle temperature judgment reference time, it is judged whether or not the water return temperature is lower than the lower limit of the pipe intermediate reference temperature (S206). Here, the pipe intermediate predicted reference temperature is a temperature at which the preheating operation is completed after completion of the preheating wait time currently being applied and the water in the middle of the

pipes

23, 24, and 22 reaches the water return temperature at the inlet side of the heat exchanger 30 Means the expected temperature range.

If it is determined in step S206 that the water return temperature is higher than the lower limit of the piping intermediate predicted reference temperature, it is determined whether the water return temperature is higher than the upper limit of the piping intermediate predicted reference temperature (S207).

If the water return temperature is between the lower limit and the upper limit of the pipe intermediate reference temperature, the preheating waiting time counted is determined as the preheating waiting time (S208), and the preheating operation is terminated.

If it is determined in step S206 that the water return temperature is lower than the lower limit of the pipe intermediate reference temperature, the corrected preheating wait time is reduced by the time set in the counted warm-up wait time (S209, S211).

If it is determined in step S207 that the water temperature is higher than the upper limit of the piping intermediate predicted reference temperature, the corrected preheating wait time is increased by the time set in the counted warm-up wait time (S210, S211).

The hot water preheating operation time update is performed in a state in which the preheating operation time determination is completed through the aforementioned hot water preheating operation time determination method.

Referring to FIG. 4, the preheating is started and the preheating operation time is counted (S301).

It is determined whether the counted preheating operation time has reached the preheating reference time (S302). Here, the preheating reference time may be set as the preheating time applied immediately before.

If the counted preheating operation time reaches the preheating reference time, it is determined whether or not the water return temperature is lower than the lower limit of the preheating water return reference temperature (the temperature stabilized in the preheating operation time determination method described above) (S303). Here, the preheating and recycling reference temperature may be a preheating temperature set by the user.

If it is determined in step S303 that the return water temperature is higher than the lower limit of the preheat water return reference temperature, the preheat operation time reestablishment count count is initialized (S304).

If it is determined in step S302 that the counted preheating operation time has not reached the preheating reference time, it is determined whether the water return temperature is higher than the upper limit of the preheating water return reference temperature (S305).

If it is determined in step S305 that the return water temperature is lower than the upper limit of the reference temperature for preheating, the preheating operation time is counted (step S301). If the return water temperature is higher than the upper limit of the preheating water return reference temperature, Is added once (S306).

If it is determined in step S303 that the return temperature is lower than the lower limit of the reference temperature for preheating and recycling, the preheating operation time re-judgment count count is added once (S306).

Then, in step S307, the number of warm-up operation time counting times counted in step S306 is compared with the reference count. The reference number is a value set to determine whether or not the number of times the water return temperature is out of the reference temperature range is repeated a predetermined number of times or more.

In step S307, when the counted number of preheating operation time re-determination exceeds the reference number, the preheating operation time is initialized (S308), and the preheating operation is terminated.

When the preheating operation time has been initialized, the preheating operation time is updated by re-executing the above-described hot water preheating operation time determination.

The warm-up preheating wait time update is performed in a state in which the warm-up wait time determination is completed through the warm-up preheat wait time determination method described above.

Referring to FIG. 5, when the preheating wait time is over, preheating is started and the piping intermediate temperature determination time is counted (S401).

Next, it is determined whether the piping intermediate temperature determination time reaches the pipe intermediate temperature determination reference time (S402).

If the piping intermediate temperature judgment time reaches the pipe intermediate temperature judgment reference time, it is judged whether the water return temperature is lower than the lower limit of the pipe intermediate reference temperature (S403).

If it is determined in step S403 that the water return temperature is higher than the lower limit of the pipe middle reference reference temperature, it is determined whether the water return temperature is higher than the upper limit of the pipe middle reference reference temperature in step S404.

If it is determined in step S404 that the water return temperature is lower than the upper limit of the piping intermediate predicted reference temperature, the preheating wait time re-determination count is initialized (S405).

If it is determined in step S403 that the water return temperature is lower than the lower limit of the piping intermediate predicted reference temperature, the preheating wait time re-judgment count count is added once (S406).

If it is determined in step S404 that the water return temperature is higher than the upper limit of the piping intermediate predicted reference temperature, the preheating wait time re-judgment count count is added once (S406).

The counted number of warm-up wait time re-judgments is compared with the reference count (S407). The reference number is a value set to determine whether the number of times the water return temperature is out of the piping intermediate predicted reference temperature range is repeated a predetermined number of times or more.

If the counted number of warm-up wait time re-judgments exceeds the reference count, the warm-up wait time is initialized (S408), and pre-heating is performed normally.

If the warm-up waiting time has been initialized, the warm-up pre-warm-up time determination is re-executed to update the warm-up wait time.

If there is a fluctuation in the flow rate sensed by the flow rate sensor 50 during the determination of the preheating operation time and the preheating wait time, the hot water is in use. At this time, the direct water is mixed into the preheating hot water, Since it is difficult to measure accurately, the determination of the preheating operation time and the determination of the preheating wait time are performed under the following determination conditions.

As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. And such modifications are within the scope of the present invention.

Claims

A hot water preheating operation time determination step of counting the time from when the hot water preheating operation is started until the return water temperature reaches the reference temperature to be stabilized to determine the hot water preheating operation time;

The hot water preheating is stopped and the preheating standby time is preheated for a preheated hot water preheating wait time, and then the temperature of the circulating water at a predetermined time after the preheating material is performed is measured. If the circulating water temperature is within the predicted reference temperature range, A warm water preheating wait time determination step of determining a warm water preheating wait time;

And a control unit for controlling the temperature of the hot water.
The method according to claim 1,

Wherein the preheating operation time is counted from a time point at which the hot water outlet temperature after the hot water preheating operation reaches the set temperature in the hot water preheating operation time determination step.
The method according to claim 1,

And the hot water preheating operation time is counted from the operation start point of the pump according to the hot water preheating operation in the hot water preheating operation time determination step.
The method according to claim 1,

Wherein the stabilizing time at which the water-return temperature is maintained within the set convergence temperature from the point at which the water-return temperature reaches the reference temperature is counted in the step of determining the hot water preheating operation time, and the counted stabilization time exceeds the stabilization reference time Wherein the preheating operation time is determined based on an installation environment.
The method according to claim 1,

Wherein the control unit counts the time at which the water return temperature reaches a predetermined temperature or more from the time when the water return temperature reaches the reference temperature at the step of determining the warm water preheating operation time and if the counted temperature arrival time exceeds the temperature arrival determination reference time Wherein the preheating operation time is determined based on an installation environment.
The method according to claim 1,

The predetermined time after the preheating material is determined is a pipe intermediate temperature determination time of the hot water preheating circulation pipe in the step of determining the hot water preheating wait time and when the pipe intermediate temperature determination time reaches the pipe intermediate temperature determination reference time, Wherein the preheating time of the hot water preheating time is measured according to the installation environment.
The method according to claim 6,

If the water return temperature is lower than the lower limit of the piping intermediate predicted reference temperature, temporarily storing the warmed-up preheating wait time corrected by reducing the preheated hot water preheating wait time by the set time,

And if the water temperature is higher than the upper limit of the piping mid-predicted reference temperature, temporarily storing the warmed-up preheating wait time corrected by increasing the preheated hot water preheating wait time by a predetermined time. Way.
The method according to claim 1,

Further comprising a hot water preheating operation time update step of initializing the preheating operation time re-judgment number count when the recirculated water temperature is between an upper limit and a lower limit of the preheat water recirculation reference temperature after the counted preheating operation time reaches the preheating reference time A method for automatic determination of hot water preheating time according to installation environment.
The method according to claim 1,

The preheating operation time re-judgment count count is added once if the recirculated water temperature is higher than the upper limit of the preheating rehabilitation reference temperature before the counted preheating operation time reaches the preheating reference time, and the counted preheating operation time re- And a hot water preheating operation time updating step of initializing the preheating operation time when the reference number of times is exceeded.
The method according to claim 1,

If the counted preheating operation time reaches the preheating reference time and the recycling temperature is lower than the lower limit of the preheating regeneration reference temperature, the preheating operation time re-judgment count count is added once, and the counted preheating operation time re- Further comprising a warm-up preheating operation time update step of initializing the warm-up operation time when the number of times of the warm-up preheating time exceeds the reference number of times.
The method according to claim 1,

When the temperature of the piping intermediate temperature is equal to the lower limit of the piping intermediate prediction reference temperature when the piping intermediate temperature judgment time reaches the pipe intermediate temperature judgment reference time at the time of performing the preheating, And a time update step, in accordance with the installation environment.
The method according to claim 1,

Wherein when the piping intermediate temperature judgment time reaches the pipe intermediate temperature judgment reference time at the time of performing the preheating and the water return temperature is lower than the lower limit of the piping intermediate predicted reference temperature, the preheating waiting time counting count count is added once, And a warm-up preheating wait time updating step of initializing a warm-up wait time when a preheating wait time re-judgment frequency exceeds a reference number of times.
The method according to claim 1,

When the pipe intermediate temperature judgment time reaches the piping intermediate temperature judgment reference time at the time of performing the preheating and the return water temperature is higher than the upper limit of the piping intermediate predicted reference temperature, the preheating waiting time counting count count is added once, And a warm-up preheating wait time updating step of initializing a warm-up wait time when the number of warm-up wait time re-determination times exceeds a reference number of times.