METHOD FOR CONTROLLING HEATING APPARATUS
An object of the present invention is to provide a method of controlling a heating apparatus that is capable of automatically controlling a heating-off temperature and a heating-on temperature according to an operation environment such that upper and lower variations of a room temperature set by a user are reduced on the basis of the room temperature, thereby allowing the user to feel comfortable. In order to achieve the object of the present invention, there is provided a method of controlling a heating apparatus that controls the start/stop operation of the heating apparatus on the basis of a room temperature set by a user. In this case, a temperature when the heating apparatus is operated to increase the room temperature and the operation of the heating apparatus is stopped is set as a temperature that is obtained by subtracting a heating-off temperature at a cycle immediately before a current cycle by a compensation value determined according to overshoot that has occurred at the cycle immediately before the current cycle, and a temperature when the operation of the heating apparatus is stopped to decrease the room temperature and the heating apparatus is operated is set as a temperature that is obtained by adding the heating-on temperature at the cycle immediately before the current cycle and a compensation value determined according to undershoot that has occurred at the cycle immediately before the current cycle, such that a difference between the measured room temperature and the room temperature set by the user is minimized.
The present invention relates to a method of controlling a heating apparatus, and more particularly, to a method of controlling a heating apparatus that is capable of minimizing a difference between a room temperature set by a user and a room temperature measured when the heating apparatus operates.
BACKGROUND ARTIn general, a heating apparatus means an apparatus that supplies hot water to a heating device. The heating apparatus burns fuel, such as gas, in the heating apparatus, heats water using heat of combustion generated by the burning, and circulates the heated water through piping that is laid in floors of rooms to heat the rooms or supplies hot water using the heated water.
As a control method that allows a heating apparatus to maintain a room temperature at a temperature set by a user, there are the following methods: a method that measures a room temperature and turns on/off the heating apparatus; a method that measures a temperature of heated water and turns on/off a heating apparatus; and a method that operates a heating apparatus during a period of time set by a user and stops the operation of the heating apparatus during a predetermined period of time.
The control method that measures the room temperature and turns on/off the heating apparatus is a control method that compares a room temperature measured by a temperature sensor attached to a room temperature controller and a room temperature set by a user and then correspondingly turns on/off a heating apparatus. The process of controlling the heating apparatus using the control method is shown in
First, a user sets a desired room temperature using a room temperature controller that is installed indoor. In this case, the set room temperature becomes T—
In this case, the heating-off temperature T—
If the heating apparatus operates, the room temperature increases. At this time, the room temperature is detected by a temperature sensor that is installed in the room temperature controller. If the room temperature detected by the temperature sensor reaches a temperature of 26° C. that is the heating-off temperature T—
In this case, since the operation of the heating apparatus is stopped, heat transfer to the heating piping that is laid in the floors of rooms is also stopped, but heat accumulated in the floors of the rooms is continuously radiated to the indoor. As a result, the room temperature increases to a temperature (for example, 27° C.) that is higher than the heating-off temperature T—
When the heating apparatus stops its operation to decrease the room temperature and the room temperature reaches the heating-on temperature of 24° C., the heating apparatus operates again.
In this case, since the heating apparatus operates, heat is transferred to heating piping that is laid in the floors of the rooms, but a predetermined amount of time is needed until the temperature at the floors of the rooms increases to the room temperature set by the user. Thus, the room temperature decreases to a temperature (for example, 23° C.) that is lower than the heating-on temperature T—
When the overshoot and undershoot occur as described above, upper and lower variations of the room temperature T—
The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a method of controlling a heating apparatus that is capable of automatically controlling a heating-off temperature T—
In order to achieve the above-described object, according to an aspect of the present invention, there is provided a method of controlling a heating apparatus. In this case, a temperature when the heating apparatus is operated to increase the room temperature and the operation of the heating apparatus is stopped is set as a temperature that is obtained by subtracting a heating-off temperature at a cycle immediately before a current cycle by a compensation value determined according to overshoot that has occurred at the cycle immediately before the current cycle, and a temperature when the operation of the heating apparatus is stopped to decrease the room temperature and the heating apparatus is operated is set as a temperature that is obtained by adding the heating-on temperature at the cycle immediately before the current cycle and a compensation value determined according to undershoot that has occurred at the cycle immediately before the current cycle, such that a difference between the measured room temperature and the room temperature set by the user is minimized.
Preferably, in the heating-off temperature, a minimum heating-off temperature is set as a temperature that is a predetermined temperature higher than the room temperature set by the user, and in the heating-on temperature, a maximum heating-on temperature is set as a temperature that is a predetermined temperature lower than the room temperature set by the user.
When the room temperature is controlled at the minimum heating-off temperature and the overshoot occurs, a control operation may be performed to reduce the amount of heat produced by the heating apparatus. In this case, it is preferable that a control operation be performed to reduce the amount of heat produced by the heating apparatus in proportion to the amount of overshoot.
ADVANTAGEOUS EFFECTSAs specifically described above, according to the method of controlling a heating apparatus according to the present invention, it is possible to automatically control a heating-off temperature and a heating-on temperature according to an operation environment of the heating apparatus such that upper and lower variations of a room temperature are reduced, thereby providing a comfortable indoor environment for a user who uses the heating apparatus.
Hereinafter, the structure and function of the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The present invention relates to implementing a method of controlling a heating apparatus that, when the heating apparatus is turned on/off according to a compared result that is obtained by comparing a room temperature measured by a temperature sensor installed in a room temperature controller and a room temperature set by a user, enables heating to be maintained such that there is a minimal temperature difference on the basis of the room temperature set by the user.
First, a user sets a desired room temperature using a room temperature controller installed indoor (S101). The set room temperature is represented as T—
If the room temperature T—
If the user sets the room temperature and the heating apparatus operates, the room temperature increases. The heating apparatus continuously operates until the room temperature reaches the first heating-off temperature T—
If the heating apparatus operates and the room temperature reaches the first heating-off temperature T—
Here, even though the operation of the heating apparatus is stopped, a large amount of heat that is supplied when the heating apparatus is operated is accumulated in the floors of rooms. As a result, heat is continuously radiated from the floors to the inside of the rooms, which causes overshoot to occur, in which the room temperature increases to a temperature higher than the first heating-off temperature T—
At this time, the temperature sensor measures a maximum temperature T—
A compensation value is determined according to the overshoot that has occurred at the first cycle, and a heating-off temperature T—
T13
A
That is, the compensation value that is determined according to the overshoot that has occurred at the first cycle is defined as (A
If the operation of the heating apparatus is stopped, the room temperature decreases. If the room temperature reaches the first heating-on temperature T—
In this case, the room temperature does not immediately increase due to specific heat of indoor air but becomes lower than the first heating-on temperature T—
A compensation value is determined according to undershoot that has occurred at the first cycle, and a heating-on temperature T—
T—
B
That is, the compensation value that is determined according to the undershoot that has occurred at the first cycle is defined as B
The heating apparatus operates and the room temperature increases again. In this case, if the temperature sensor detects that the room temperature reaches the heating-off temperature (that is, T—
As such, the operation of the heating apparatus is stopped at the temperature that is obtained by subtracting the first heating-off temperature by the compensation value A
At this time, the temperature sensor measures the maximum temperature T—
A compensation value A
T—
A
As the operation of the heating apparatus is stopped, the room temperature decreases. In this case, if the room temperature reaches the second heating-on temperature T—
At this time, the temperature sensor measures a minimum temperature T—
A compensation value B
T—
B
If the above-described method is used to determine the heating-off temperature T—
Further, the amounts of overshoot and undershoot that occur when the heating apparatus operates depend on an installation environment of the heating apparatus. Thus, it is difficult to accurately predict the amounts of overshoot and undershoot at the time of designing the heating apparatus. Accordingly, if using the compensation values that are determined according to the amounts of overshoot and undershoot measured by using the above-described method, it becomes possible to automatically set the heating-off temperature T—
When the control operation is performed according to the above-described method, Equations 1 to 8 that compute the heating-off temperature and the heating-on temperature may be represented by the following general Equations.
T—
T—
A
B
In this case, (n) indicates a value at a current controlled cycle, and (n−1) indicates a value determined at a cycle immediately before the current controlled cycle.
Meanwhile, in order to control the heating-off temperature and the heating-on temperature without error, the heating-off temperature needs to be controlled to be higher than the room temperature T—
Accordingly, the heating-off temperature is preferably controlled to be higher than the minimum heating-off temperature T—
The heating-on temperature is preferably controlled to be lower than the maximum heating-on temperature T—
Even when temperature control is performed such that the room temperature is maintained at the minimum heating-off temperature T—
That is, when it is determined that the heating-off temperature T—
In this case, in regards to a decreasing rate of the amount of heat, the amount of heat may be decreased in proportion to the amount of overshoot, as shown in
As shown in
The heating system includes a heating apparatus 110 that supplies water heated by burning fuel, a heated water distributing unit 120 that distributes the heated water supplied by the heating apparatus 110 into individual rooms, a valve 130 that controls supply and stop of the heated water distributed by the heated water distributing unit 120 to the individual rooms, a valve controller 140 that controls driving of the valve 130, and a room temperature controller 150 that is connected to the valve controller 140 and sets a predetermined room temperature for each of the rooms.
The valve 130 may be an on/off-typed valve or a proportional control valve that controls the amount of heated water supplied.
The heating apparatus 110, the valve controller 140, and the room temperature controller 150 are connected to each other through communication lines, and exchange necessary data with each other.
If a current temperature is lower than the room temperature that is set by the room temperature controller 150, the valve controller 140 transmits a signal to the heating apparatus 110, and drives the valve 130 to increase the temperature of a corresponding room.
In this case, a method of controlling overshoot and undershoot that occur due to an increase and a decrease in the room temperature is the same as the above-described control method.
A method of controlling the temperature of each room in a district heating system and a central heating system that externally supply heated water also controls overshoot and undershoot using the above-described control method, and can help to provide a comfortable indoor environment for the user.
It will be apparent to those skilled in the art that various modifications and changes may be made without departing from the scope and spirit of the present invention. Therefore, it should be understood that the above embodiments are not limitative, but illustrative in all aspects.
Claims
1. A method of controlling a heating apparatus that controls the start/stop operation of the heating apparatus on the basis of a room temperature set by a user, wherein a temperature when the heating apparatus is operated to increase the room temperature and the operation of the heating apparatus is stopped is set as a temperature that is obtained by subtracting a heating-off temperature at a cycle immediately before a current cycle by a compensation value determined according to overshoot that has occurred at the cycle immediately before the current cycle, and a temperature when the operation of the heating apparatus is stopped to decrease the room temperature and the heating apparatus is operated is set as a temperature that is obtained by adding the heating-on temperature at the cycle immediately before the current cycle and a compensation value determined according to undershoot that has occurred at the cycle immediately before the current cycle, such that a difference between the measured room temperature and the room temperature set by the user is minimized.
2. The method of claim 1, wherein, in the heating-off temperature, a minimum heating-off temperature is set as a temperature that is a predetermined temperature higher than the room temperature set by the user, and in the heating-on temperature, a maximum heating-on temperature is set as a temperature that is a predetermined temperature lower that the room temperature set by the user.
3. The method of claim 1, wherein, when the room temperature is controlled at the minimum heating-off temperature and the overshoot occurs, a control operation is performed to reduce the amount of heat produced by the heating apparatus.
4. The method of claim 3, wherein, when the room temperature is controlled at the minimum heating-off temperature and the overshoot occurs, a control operation is performed to reduce the amount of heat produced by the heating apparatus in proportion to the amount of overshoot.
5. The method of claim 2, wherein, when the room temperature is controlled at the minimum heating-off temperature and the overshoot occurs, a control operation is performed to reduce the amount of heat produced by the heating apparatus.
6. The method of claim 5, wherein, when the room temperature is controlled at the minimum heating-off temperature and the overshoot occurs, a control operation is performed to reduce the amount of heat produced by the heating apparatus in proportion to the amount of overshoot.
Type: Application
Filed: Mar 10, 2008
Publication Date: Apr 22, 2010
Inventor: Si-Hwan Kim (Incheon)
Application Number: 12/531,060