JP2000081220A - Control method of regenerative electric floor heating system - Google Patents

Abstract

(57) [Problem] To perform a heat storage operation so that a temperature of a heat storage type electric floor heating system reaches a set temperature, and accurately set a heat storage operation start time in accordance with a heat release amount. SOLUTION: The underfloor temperature and the set underfloor temperature from the beginning of the heat storage operation time to the heat storage operation start time are compared, and when the underfloor temperature decreases to the set underfloor temperature before the heat storage operation start time, the temperature of the underfloor temperature is increased. The time when the underfloor temperature becomes equal to the set underfloor temperature is predicted from the gradient, and the heat storage operation start time is advanced by a time corresponding to the time from the predicted time to the heat storage operation start time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat storage operation time,
The present invention relates to a method for controlling a heat storage type electric floor heating system in which a heat storage operation start time and a set temperature are preset.

[0002]

2. Description of the Related Art Conventionally, means for measuring a rise energization time at a certain time in the past, a bed temperature at the start of energization and a bed temperature at the end of energization, a means for calculating a temperature rise gradient from these measured values, Means for storing the temperature rise gradient value,
A floor heating system has been proposed in which floor heating power is turned on at a time determined based on an average value of a plurality of stored temperature rise gradient values (Japanese Patent Laid-Open No. 8-272458).
Reference).

[0003]

Problems to be Solved by the Invention Japanese Patent Application Laid-Open No. 8-27245
When the floor heating system described in Japanese Patent Publication No. 8 is adopted, the power-on time can be set using the temperature rising gradient. However, since a linear heating gradient cannot always be obtained depending on the heat storage material incorporated in the floor heating system, there is a disadvantage that satisfactory control of the floor heating system cannot be performed.

[0004] The present invention has been made in view of the above problems, and in performing the heat storage operation so that the temperature of the heat storage type electric floor heating system reaches the set temperature, the heat storage operation start time is adjusted to the heat release amount. It is an object of the present invention to provide a control method of a regenerative electric floor heating system that can be set accurately.

[0005]

According to a first aspect of the present invention, there is provided a method for controlling a regenerative electric floor heating system, comprising comparing an underfloor temperature and an underfloor temperature from an initial time of a heat storage operation period to a start time of a heat storage operation. This is a method of correcting the heat storage operation start time based on the time.

According to a second aspect of the present invention, when the underfloor temperature drops to the set underfloor temperature before the heat storage operation start time, the underfloor temperature is set to the set underfloor temperature from the temperature gradient of the underfloor temperature. This is a method of estimating a time at which the heat storage operation becomes equal and advancing the heat storage operation start time by a time corresponding to the time from the predicted time to the heat storage operation start time.

[0007]

According to the control method of the regenerative electric floor heating system of the first aspect, in the case of controlling the regenerative electric floor heating system based on a preset heat storage operation time, a heat storage operation start time, and a set temperature. Since the underfloor temperature and the set underfloor temperature from the beginning of the heat storage operation time to the heat storage operation start time are compared and the heat storage operation start time is corrected based on the comparison result, the heat storage operation start time is adjusted to the heat release amount. In addition to being able to set accurately, heat storage can be performed by continuing to supply power to the heat storage type electric floor heating system after the heat storage operation start time.

According to the control method of the regenerative electric floor heating system of the second aspect, when the underfloor temperature decreases to the set underfloor temperature before the heat storage operation start time, the underfloor temperature is changed from the temperature gradient of the underfloor temperature to the underfloor temperature. Predict when the temperature will be equal to the temperature,
Since the heat storage operation start time is advanced by the time corresponding to the time from the predicted time to the heat storage operation start time, the heat storage operation start time can be advanced in response to a large amount of heat release.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a control method for a regenerative electric floor heating system according to the present invention will be described in detail with reference to the accompanying drawings. Note that the configuration of the regenerative electric floor heating system is conventionally known, and a description thereof will be omitted.

FIG. 1 is a flowchart for explaining a process for setting a heat storage operation start time.

In step SP1, the operation waits until the heat storage operation start time has arrived. In step SP2, power is supplied to the heat storage type electric floor heating system.
In P3, it is determined whether the under-floor temperature has exceeded a preset temperature. If it is determined that the underfloor temperature does not exceed the preset temperature, step SP4
In, it is determined whether or not the heat storage operation end time has arrived. If the heat storage operation end time has not reached, the determination in step SP3 is performed again. Conversely, if it is determined in step SP3 that the underfloor temperature has exceeded the preset temperature, in step SP5, the power supply to the regenerative electric floor heating system is stopped, and step SP6 is performed.
In step SP7, the energization stop time is counted (or the energization time is counted). In step SP7, it is determined whether or not the heat storage operation end time has arrived. SP3 is determined.

When it is determined in step SP4 and step SP7 that the heat storage operation end time has arrived, in step SP8, a correction value of the power supply start time is calculated from the count value of the power supply stop time, and a series of processing is performed as it is. To end.

Here, the process of calculating the correction value T of the energization start time is performed, for example, as follows.

If the energization stop time obtained from the count value of the energization stop time is T1 hours, the safety factor of the energization stop is Y%, and the preliminary heat storage completion time is T2 hours, T = T1 × Y−T2
By performing the above calculation, the correction value T of the energization start time can be calculated. Specifically, the heat storage operation start time is 23:00, the heat storage operation end time is 7:00, the power supply stop time is 3.5 hours, the power supply stop safety factor is 80%, and the heat storage completion preliminary time is 0.5 hour. In this case, the correction value of the energization start time is 2.3 hours, so the corrected heat storage operation start time is 1:18, which is 2.3 hours after 23:00.

If the correction value of the energization start time is calculated as described above, even if the next heat storage operation start time has arrived, it is necessary to wait until the correction value of the energization start time elapses before energizing. After that, the heat storage operation can be performed up to the heat storage operation end time by continuously supplying power.

FIG. 2 is a schematic diagram showing the transition of the under-floor temperature when the first heat storage operation is performed, and it can be seen that the power supply stop time occurs due to the small amount of heat radiation.

FIG. 3 is a schematic diagram showing the transition of the underfloor temperature when the second heat storage operation is performed. The energization start time is delayed, and thereafter the energization is continuously performed so that the underfloor temperature becomes the set temperature. It can be seen that it has been raised.

When the first heat storage operation and the second heat storage operation are completed and the third heat storage operation is performed, the processing of the flowchart shown in FIG. 4 is performed.

In step SP1, an average value T3 of the underfloor temperature at the start of energization of the first heat storage operation and the underfloor temperature at the start of energization of the second heat storage operation is calculated. Average value t3 of the energization start time of the second heat storage operation and the energization start time of the second heat storage operation
In step SP3, the magnitude of the underfloor temperature T4 at the power supply start time before correction and the average underfloor temperature T3 are compared (see FIG. 5). If it is determined that T4 <T3, in step SP4, the underfloor temperature is calculated from the temperature gradient of the underfloor temperature before the power supply start time before correction (for example, one hour before the power supply start time before correction). Is calculated to be equal to the average under-floor temperature, a time of p1% of the time from this time to the average energization start time t3 is calculated, and the time t4 earlier than the average energization start time t3 by the calculated time is corrected. (See FIG. 6). However, when the time t4 is earlier than the power supply start time before correction, the power supply start time before correction and the power supply start time are adopted.

Conversely, at step SP3, T4 ≧ T3
Is determined in step SP5, it is determined whether or not the actual underfloor temperature T5 has reached the average underfloor temperature T3 between the power supply start time before correction and the average power supply start time t3. Then, the actual underfloor temperature T5 between the power supply start time before the correction and the average power supply start time t3.
Is determined to have reached the average underfloor temperature T3, in step SP6, a time of p1% of the time from the time t5 when T5 = T3 to the average energization start time t3 is calculated, and the calculated time is calculated. The time t6 earlier than the average energization start time t3 is set as the corrected energization start time.

If it is determined in step SP5 that the actual underfloor temperature T5 has not reached the average underfloor temperature T3 during the period from the power supply start time before correction to the average power supply start time t3, the process proceeds to step SP7. A temperature gradient in a predetermined period preceding the energization start time t3 is calculated, and in step SP8, T5 =
A scheduled time t7 to be T3 is calculated, and in step SP9, a time of p1% of the time from the average energization start time t3 to the scheduled time t7 is calculated, and a time t8 later than the average energization start time t3 by the calculated time. Is the energization start time after the correction.

If the corrected power supply start time is calculated in step SP4, step SP6 or step SP9, the process waits in step SP10 until the corrected power supply start time arrives, and in step SP11, the corrected power supply start time. Power is supplied to the regenerative electric floor heating system over the period from the start time to the power supply end time, and the series of processing is terminated.

Note that p1% is a value for covering the heat release amount with the heat storage capacity of the floor heating, and varies depending on the heat storage type electric floor heating system, but is set to, for example, 20%.

Therefore, an optimal energization start time can be set in accordance with the amount of heat radiation, that is, the level of the outside air temperature, and the energy use efficiency can be improved.

In the flowchart of FIG. 4, the average temperature and the average energization start time at the energization start time are adopted as criteria for the determination. For example, the temperature and the energization start time at the energization start time of the previous day are determined. It can be adopted as a reference.

When the first to n-th heat storage operations are completed and the (n + 1) -th heat storage operation is performed, the processing shown in the flowchart of FIG. 9 is performed.

In step SP1, a comparison is made between the set room temperature and the average room temperature during heat dissipation. If it is determined that the set room temperature is equal to or lower than the average room temperature during heat dissipation, the process proceeds to step SP1.
In 2, the magnitude of the set room temperature and the average room temperature during heat storage are compared.

If it is determined that the average room temperature at the time of heat radiation is lower than the set room temperature, at step SP3, the set average under-floor temperature is calculated as the absolute value of the difference between the average room temperature at the time of heat radiation and the set room temperature. Is increased by a value obtained by multiplying by the room temperature adjustment parameter, and the processing of the above-described flowchart is performed as it is.

If it is determined that the average room temperature at the time of heat storage is higher than the set room temperature, in step SP4,
The set average underfloor temperature is lowered by a value obtained by multiplying the absolute value of the difference between the average room temperature during heat storage and the set room temperature by a room temperature adjustment parameter, and the processing of the above-described flowchart is performed as it is.

When it is determined that the average room temperature during heat storage is equal to or lower than the set room temperature, the processing of the above-described flowchart is performed without changing the set average underfloor temperature.

Here, the room temperature adjustment parameter is experimentally determined according to the state of the room and the like.
Set to 200%. The average room temperature during heat storage may be the average room temperature for the entire period during which the heat storage operation is performed, or may be the average room temperature for some periods.

Therefore, by adjusting the average under-floor temperature in accordance with the magnitude of the set room temperature and the average room temperature, it is possible to eliminate the effects of solar radiation, air blowout of an air conditioner, etc., thereby realizing proper heat storage. , Energy use efficiency can be improved.

[0033]

According to the first aspect of the present invention, the heat storage operation start time can be accurately set in accordance with the heat release amount, and after the heat storage operation start time, the heat storage electric floor heating system is continuously energized to store the heat. It has a unique effect that it can be performed.

The invention of claim 2 has a specific effect that the heat storage operation start time can be advanced in response to a large amount of heat radiation.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a process of setting a heat storage operation start time.

FIG. 2 is a schematic diagram showing a change in underfloor temperature when a first heat storage operation is performed.

FIG. 3 is a schematic diagram showing a change in underfloor temperature when a second heat storage operation is performed.

FIG. 4 is a flowchart illustrating a correction process of a heat storage operation start time when a third heat storage operation is performed.

FIG. 5 is a schematic diagram for explaining a comparison between an underfloor temperature and an average underfloor temperature.

FIG. 6 is a schematic diagram illustrating an example of a correction process of a heat storage operation start time.

FIG. 7 is a schematic diagram illustrating another example of the heat storage operation start time correction process.

FIG. 8 is a schematic diagram illustrating still another example of the process of correcting the heat storage operation start time.

FIG. 9 is a flowchart illustrating a process of setting an average underfloor temperature in a case where a third heat storage operation is performed.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Satoru Yamagishi 2-12-19 Shibuya, Shibuya-ku, Tokyo Co., Ltd. Takeuchi Shayama Co., Ltd. (72) Yuichi Hayashi 4-3 Ikejiri, Itami-shi, Hyogo Mitsubishi Electric Industrial Co., Ltd. (72) Inventor Akira Sasaki 4-3-1 Ikejiri, Itami-shi, Hyogo Mitsubishi Cable Industries, Ltd.Itami Works F-term (reference) 3L071 CC05 CD01 CE01 CF05 CG02 CH01 CJ01 3L072 AA02 AB03 AC02 AD06 AD13 AD14 AE02 AF01 AG01

Claims (2)

[Claims] In a regenerative electric floor heating system in which a heat storage operation time, a heat storage operation start time, and a set underfloor temperature are preset, an underfloor temperature and a set underfloor temperature from an initial heat storage operation time to a heat storage operation start time. And correcting the heat storage operation start time based on the comparison result. 2. When the underfloor temperature decreases to the set underfloor temperature before the heat storage operation start time, a time at which the underfloor temperature becomes equal to the set underfloor temperature is predicted from a temperature gradient of the underfloor temperature, and the heat storage operation is started from the predicted time. The control method of the heat storage type electric floor heating system according to claim 1, wherein the heat storage operation start time is advanced by a time corresponding to the time until the time.