JPH03244928A - Floor heating device - Google Patents

Abstract

PURPOSE:To restrict a consumption of an electrical power by a method wherein a control is determined in a control period divided in a certain duration such that the number of heaters concurrently energized becomes minimum. CONSTITUTION:A control circuit 7 calculates a rate of electrical energization in response to temperature data got from temperature sensing elements 13, 14, 15 and 16 and temperature target values of each of the heaters 1, 2, 3 and 4 separately set. That is, a mean value of the surrounding temperatures of the heaters 1, 2, 3 and 4 is calculated for every control period T for each of the heaters 1, 2, 3 and 4, calculates a difference between the surrounding means temperature and the target temperature value, multiplies the differential value by its coefficient to get a variation of rate of electrical energization. A present rate of electrical energization is added to it and if it is more than 100%, it is set to 100% and if it is less than 0%, it is set to 0% to make a rate of electrical energization for the next control period. ON/OFF distribution schedule is made so as to cause the number of heaters 1, 2, 3 and 4 concurrently turned ON at the control period T to become minimum and then the relays 9, 10, 11 and 12 are controlled correspondingly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a floor heating device for heating the floor side of an electric floor heating panel, electric carpet, etc. using a heater.

[Prior Art] FIG. 6 shows a conventional floor heating device disclosed in, for example, Japanese Patent Application Laid-Open No. 190330/1983. That is, a plurality of heaters 2
0, 21, and 22 are arranged so as to divide the heating area to form a flat main body 23. Each of these heaters 20, 21, 22 is controlled to be energized by the control device 24 simultaneously or alternately. The control device W24 has a configuration as shown in FIG. 7, in which a control circuit 27 simultaneously controls each heater 20, 21, 22 via relays 28, 29, and 30 based on the output of a thermistor 25, 26 that detects the temperature around the heater. Alternatively, the energization is controlled alternately.

In the floor heating device having the above configuration, each heater 20.21.
22 are each independently controlled by relays 28, 29, and 30. That is, each heater 20, 21, 22 is energized simultaneously or alternately, and when a large amount of heat is required, such as when the power is turned on, the heaters 20, 21 are energized at the same time.
Raise the temperature of ゜22 quickly, heater 20.21゜22
When the temperature rises to a certain extent, the power is turned on alternately to reduce power consumption.

[Problems to be Solved by the Invention] In the conventional floor heating device described above, the heater 20.
Since the control method is to energize heaters 21 and 22 simultaneously or alternately, there is a problem in that if the number of heaters 20 and 2122 increases or the energization rate of heaters 20 and 2122 increases, the effect of suppressing power consumption will be lost. Contains issues that should be addressed.

This invention was made in order to solve such conventional problems, and the purpose is to obtain a floor heating device that can even out power consumption even if the energization rate of each heater changes or the number of heaters increases. shall be.

"Means for Solving the Problems" A floor heating device according to the present invention detects the ambient temperature of each heater in a plurality of heaters using a temperature detection means, and sets the temperature separately from the temperature data from the temperature detection means. The energization rate of each heater is calculated for each specific control cycle based on the target temperature of each heater, and the energization of each heater is controlled by the control circuit for each control cycle by distributing the energization time according to the calculated energization rate. This is what I did.

[Operation] In the present invention, the number of heaters that are energized at the same time is determined to be the minimum in a control period in which control is divided into a certain period.

[Example] Figures 1 to 5 all show a floor heating device as an example of the present invention. For example, this device
As shown in the figure, each heater 1, 2.3. 4 is connected to a control device 6 that controls each of them individually. The relationship between the control circuit 7 of the control device 6 and each heater 1.2.3.4 is as shown in the circuit configuration diagram of FIG. That is, each heater 1, 2, 3.4 connected in parallel to the power source 8 has contacts 9a, 10a of relays 9.10, 11.12 connected in series, respectively.
.

11a, 12a are inserted, each contact 9a, 10a 1
By closing 1a and 12a, power source 8 is individually supplied to each heater 1°23.4. Temperature detection elements 13, 14, 15, 16 such as thermistors are arranged in correspondence with each heater 1.2, 3.4 to detect and output the respective surrounding temperatures.
All of these output signals are input to the control circuit 7.

The control circuit 7 receives temperature data from the temperature detection elements 13, 14, 15, and 16, and each separately set heater 1, 2, 3.
．． The energization rate of each heater 1, 2, 3.4 is calculated based on the temperature target value of 4.

That is, for each heater 1, 2, 3.4, the average value of the ambient temperature of the heater 1, 23.4 is calculated as shown in FIG. 3 every control period T, and the difference from the temperature target value is calculated. This difference value is multiplied by a coefficient to obtain a change in the energization rate. The current energization rate is added to this, and when it is 100% or more, it is set to 100%, and when it is 0% or less, it is set to 0% and used as the energization rate for the next control cycle.

The energization rate of each heater 1, 2°3.4 obtained as described above is as shown in FIG.

Heater 1 that is turned on at the same time in the control period T
．． The 0N10FF allocation schedule is created so that the number of 2, 3.4 is minimized, and the relays 910.11.12 are controlled accordingly. Figure 5 shows this ON in the control period T.
10 shows an example of a FF allocation schedule. That is, the heater 1 is turned on for the energization weight from the beginning of the control period T.
Then it turns OFF. The heater 2 is turned ON for the amount of current applied when the heater 1 is turned OFF, and then turned OFF.

The heater 3 is ON for the amount of current applied when the heater 2 is turned OFF, and then turned OFF. At this time, the amount exceeding the control period T is distributed to the beginning of the control period T. The heater 4 is ON for the amount of current applied when the heater 3 is turned OFF, and is then turned OFF. This is repeated one after another every control period T. Even when the number of heaters 1, 2.degree. 3.4 increases, similar energization control is performed according to the above-mentioned 0N10FF distribution schedule. Therefore, power consumption can be averaged while maintaining the heating effect, and even if the energization rate of each heater 1.2.3.4 changes or the number of heaters 1, 2, and 3.4 increases, the power consumption will always be averaged. This also reduces the restrictions imposed by contract power when used in conjunction with other electrical equipment.

In addition, 0N10FF of heaters 1, 2, 3.4 is
．． 10.11.12, it may be performed using a semiconductor such as a triac or a thyristor, and the temperature detection element 13
, 14, 15, and 16 may be a hodister or the like. Further, the number of heaters 1.2.3.4 may be any number as long as it is plural.

[Effects of the Invention] As is clear from the above description of the embodiments, according to the present invention, the number of heaters that are energized at the same time is minimized in a control cycle in which control is divided into a certain period. Even if the energization rate of each heater changes or the number of heaters increases, the power consumption is always averaged, and the effect of suppressing power consumption can be expected.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the overall configuration of a floor heating device as an embodiment of the present invention, FIG. 2 is a circuit diagram showing the configuration of a control device thereof, and FIG. 3 is a diagram showing the energization rate. Calculation flowcharts, Figures 4 and 5 are ON, respectively.
6 is a plan view showing the configuration of a floor heating device as a conventional example, and FIG. 7 is a configuration diagram of a control circuit as the same conventional example. In the figure, 1, 2.34 are heaters, 7 is a control circuit, and 13.14.1516 is a temperature detection element. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An apparatus comprising a plurality of heaters and performing floor heating by energizing each heater, comprising a control circuit for controlling each heater individually and a temperature detection means for detecting the ambient temperature of each heater, The energization rate of each heater is calculated for each specific control cycle based on the temperature data and the separately set target temperature of each heater, and the energization of each heater is controlled for each control cycle by distributing the energization time according to the calculated energization rate. A floor heating device characterized by: