JPH1061958A - Control system for heat storage type electric floor heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat storage type electric floor heating system facilitating creating of a comfortable heating environment at a lower working cost and moreover, regardless of environmental conditions at a lower maintaining cost with a simple structure by improving a defect of the prior art. SOLUTION: In a heat storage type floor heater, a heating body 4 adapted to generate heat by supplying electric energy is buried into a heat storage body 3 composing a floor part 2. When the heat storage type floor heater is initially used or its use is started after a long unuse period, after the start of the operation of energizing the heat storage body 3 during the period lower in power charge, the energizing operation is continued until the surface temperature of the heat storage body 3 reaches a desired temperature predetermined regardless of whether the period lower in power charge ends or not.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage system in which heat energy is stored in a heat storage material constituting a floor portion of a room interior of a building by using inexpensive nighttime electric power, and the heat is radiated to perform daytime heating. The present invention relates to a type electric floor heating system.

[0002]

Conventionally, in a power company,
In addition to promoting the use of heat storage tanks, a tariff system has been adopted to reduce the nighttime electricity rates, and to correct the imbalance between daytime and nighttime electricity use. by the way,
There are various types of heating of a building due to consumption of electric power, such as when an air conditioner such as a normal heat pump is used.In particular, in heating a large space, compared to a heating method that blows hot air, The heating method is excellent in terms of comfort and heating efficiency because the vertical temperature difference in the room can be reduced and a direct heating effect can be expected by radiation.

[0003] Against the background of the power supply situation and the characteristics of the heating system, there has been proposed a skeleton heat storage type floor heating system using a skeleton of a building which can provide a comfortable heating space with a low maintenance cost. . Such a skeleton heat storage type floor heating system uses inexpensive nighttime electric power, stores heat generated from a heating element buried in the skeleton in the skeleton itself, and performs daytime floor heating by radiating the heat. .

Therefore, the heat stored by inexpensive power is
By being able to radiate heat under the most favorable conditions, an optimal heating environment can be realized at low maintenance costs. However, in such a frame heat storage type floor heating system, it is generally difficult to control the heat storage and heat dissipation. Since only the heat storage amount is radiated, it is difficult to follow a change in the heating load in the daytime. Therefore, especially in the daytime, when there is solar radiation, the heat radiation contributes more than necessary to the heating, and the temperature in the room becomes too hot, and there is a possibility that the state becomes uncontrollable. In addition, various conditions such as the amount of heat stored in the frame, the amount of heat released, the heat transfer loss due to conduction, the weather, and the like differ from building to building, making it difficult to set optimum equipment capacity and perform proper operation.

[0005] Therefore, conventionally, as a method of solving such a problem, for example, a method of performing an energizing operation during a period in which the electricity rate in the regenerative electric floor heating system is low has been proposed. As a specific example, as shown in FIG. 2, the energizing operation for the heat storage unit is started in synchronization with the start of a period in which the power rate is low, and the energizing operation is performed when the surface temperature of the heat storage unit is low. On the other hand, when the temperature reaches a predetermined target set temperature, the ON / OFF operation is repeated until the end of the energizing operation, so that unnecessary power is consumed. And adversely affect the service life of temperature control equipment.
Further, in the above, the upper limit temperature (threshold for turning off the energizing operation) and the lower limit temperature (threshold for turning on the energizing operation) provided around the target set temperature when the ON / OFF operation is performed. Threshold) is generally set to a width of 6 ° C. to 9 ° C.
At the end of the energization operation, if the surface temperature of the heat storage body is at the lower limit temperature, the energization operation is stopped in a state where the heat storage amount of the heat storage body is small. There was a problem that it was not possible to obtain a great heating effect.

On the other hand, as a specific method for avoiding such a problem, for example, a prediction control method has been proposed in which the energizing operation is started by estimating the energizing operation start time. That is,
In such a power supply start time prediction control method, for example, as shown in FIG.
For example, when energization is continued by 8:00 am when the period in which the power rate is low ends, the surface temperature of the heat storage body is sequentially measured and stored in appropriate storage means, and based on the stored data, A temperature change curve a indicating a temperature change over time of the heat storage body is obtained and stored in an appropriate table.

Similarly, a plurality of similar temperature change curves a, a ', a "... Are obtained in accordance with various temperature environments and weather environments, and are stored in the table. When actually determining the time when the energizing operation is started for the heat storage element, when the energizing operation is stopped at, for example, 8:00 am when the period in which the electricity charge is cheap ends, the surface temperature of the heat storage element is set to a predetermined value. The temperature change curve a set so as to reach the surface temperature Tm is selected from the table and determined, and the start time of the energizing operation is determined using the selected temperature change curve a. FIG. 3 is a graph showing a prediction of the amount of decrease in the surface temperature of the heat storage element due to heat radiation from the measured value of the surface temperature of the heat storage element at time t3 at which the energization operation start time to the heat storage element is predicted. Using b,
The intersection with the graph a is set as the energization operation start time for the heat storage body.

That is, if the actual temperature of the surface temperature of the heat storage element at the time t3 when the start time of the energization operation to the heat storage element is predicted or Po, the curve b1 and the temperature change curve a, for example, When the energization operation is started at the intersection point to of the heat storage element, and when the actual temperature of the surface temperature of the heat storage element at the time t3 when the energization operation start time to the heat storage element is predicted is P1 or b1, b And a temperature change curve of a, for example, to start an energization operation at an intersection t1.
If it is P2 or the actual measured value of the surface temperature of the heat storage body at the time t3 when the energization operation start time to the heat storage body is predicted, the intersection t2 between the curve of b2 and the temperature change curve of a, for example,
To start the energizing operation.

[0009] The predicted energizing operation start time for the heat storage element is stored in a storage means in an appropriate control means, and when a predetermined time has arrived, the control means, via the CPU, The heat storage body is configured to start an energization operation. However, even in such a conventional heat storage type electric floor heating system, the heat storage efficiency or the heat radiation efficiency for the frame is slightly different due to the material of the frame used as the heat storage or the aging of the frame. Therefore, when simply using the temperature change curve obtained by the above-described method as it is,
Season, environment,
In some cases, it is difficult to accurately control heating conditions that vary depending on weather conditions and the like.

In particular, when the heat storage body is used for the first time after completion of construction in a predetermined building, or when it is likely to be reused after a desired season has arrived, the heat storage type electric floor is used. Depending on the environment in which the heating device is placed, a predetermined heating performance may not be exhibited from the time of the first energization operation, and particularly in a cold region, the temperature of the heat storage body is low. In such a case, there is a problem that the influence is particularly large and a sufficient heating effect cannot be obtained.

[0011] Further, in such a regenerative electric floor heating system, the room is heated only by radiating heat from the regenerator during the daytime. When the surface temperature of the heat storage unit is greatly affected by the environment in which the heating device is placed after the end of the energizing operation, and particularly in a cold region, the surface temperature of the heat storage unit is significantly reduced. Then, there is a case where it becomes impossible to maintain the room temperature at a predetermined set temperature, and in that case, there is another problem that a sufficient heating effect cannot be obtained.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned disadvantages of the prior art, to reduce the construction cost, to have a simple structure, and to maintain a low maintenance cost, regardless of environmental conditions. The present invention provides a regenerative electric floor heating system that can create a comfortable heating environment. The present invention basically employs the following technical configuration to achieve the above object. That is, as a first embodiment of the regenerative electric floor heating system according to the present invention,
A thermometer that buries a heating element that generates heat by supplying electric energy to a heat storage element that constitutes at least a part of a floor in a room and that measures the surface temperature of the floor at least on the surface of the floor. The lower surface of the floor is covered with a heat insulating material such that a thermistor is arranged and heat from the heating element is stored in the floor by interrupting heat conduction below or outside the floor. The heat storage type floor heating device, wherein the power storage operation is performed during a period in which the power rate is low to measure the accumulation of thermal energy, and the power storage operation is stopped during the period in which the power rate is high. When maintaining the indoor heating using heat radiation from the heat storage element, the temperature of the heat storage element reaches a desired temperature at a time when the energizing operation on the heat storage element is stopped during a period in which the power rate is low. Doing As in, selects a predetermined temperature change curve for energization time of the heat storage body are predetermined,
With reference to the selected temperature change curve, an energization start time for the heat storage element is determined, and in the heat storage type electric floor heating apparatus configured to start an energization operation to the heat storage element at the energization start time. When the heat storage type electric floor heating device is used for the first time or after a long period of non-use, the operation of energizing the heat storage body during the period when the power rate is low starts after the period when the power rate is low. Regardless of whether or not to end, a heat storage type electric floor heating control system in which the energization operation is continued until the surface temperature of the heat storage body reaches a predetermined desired temperature, and As an embodiment, from among a plurality of types of the predetermined temperature change curve groups, one temperature change curve in which it is predicted that the heat storage body has a desired surface temperature at the end of the period in which the electric power rate is low. Select the selected The heat storage type electric floor in which, when the heat storage is started to be energized, the time at which the heat storage is started to be energized is changed according to the material of the heat storage or the age over time according to the energization start time of the temperature change curve. It is a heating system.

[0013] In a third aspect of the heat storage type electric floor heating system according to the present invention, the surface of the heat storage body after the heat storage body starts radiating heat after the operation of energizing the heat storage body is completed. The temperature is sequentially measured, and the heat dissipation characteristic curve of the heat storage body is obtained from the data, and the average heat storage body reference heat emission characteristic curve is obtained from the heat emission characteristic curve of the heat storage body for several consecutive days, and the predetermined storage is performed. The expected surface temperature of the heat storage body indicated by the reference heat radiation characteristic curve is compared with the current surface temperature of the heat storage body sequentially measured after the end of the energizing operation. If the difference between the current surface temperature of the heat storage body and the predicted surface temperature of the heat storage body at the same time indicated by the reference heat radiation characteristic curve is equal to or greater than a predetermined value, the forced operation is performed. Power supply operation is started That the surface temperature of the heat storage body, a regenerative electric floor heating system that controls so as to match the temperature indicated by the reference radiation characteristic curve.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention employs the above-mentioned technical configuration, so that when a period in which a power rate is lower than that of a conventional heat storage type electric floor heating system, the heat storage body is not used. When the energizing operation is stopped, the surface temperature of the heat storage body can be set and maintained almost exactly at a predetermined set temperature, and the indoor temperature can be accurately set while having a simple and inexpensive configuration. It is possible to realize a controllable heat storage type electric floor heating system, and at the same time, according to the material, capacity, or aging of the heat storage body, the temperature change used when performing the energizing operation to the heat storage body Since the curve is adjusted to use the modified temperature change curve, it is possible to realize a stable and accurate indoor temperature control system regardless of the material, capacity, or aging of the heat storage body. Becomes

Further, in the regenerative electric floor heating system according to the present invention, even if the regenerator enters a radiating state after the energizing operation for the regenerator is completed, the surface temperature of the regenerator can be reduced. The measurement is continued, and the change of the surface temperature of the heat storage body with time in the heat radiation state, that is, the heat radiation characteristic curve of the heat storage body indicating the decrease of the surface temperature is obtained, and the actual surface temperature of the heat storage body and the predetermined value are determined. If the difference from the heat dissipation characteristic curve of the heat storage body becomes larger than a predetermined value, the power supply operation is forcibly restarted for the heat storage body to supply electric energy to the heat storage body. Since the surface temperature of the heat storage body is adjusted and controlled to match the heat radiation characteristic curve of the heat storage body, for example, when the outside air temperature environment changes extremely, for example, when the outside air temperature drops rapidly In the heat storage body When the heat increases and the surface temperature of the heat storage body falls below the heat radiation characteristic curve of the heat storage body that is a predetermined reference, by restarting the energization operation, the surface temperature of the heat storage body is reduced. Since the temperature of the heat storage element is returned to the predetermined reference temperature, it is possible to realize a stable, accurate and comfortable indoor temperature control system irrespective of a change in the outside air temperature.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a heat storage type electric floor heating system according to the present invention. FIG. 1 is a diagram showing a schematic configuration of a specific example of a heat storage type electric floor heating system according to the present invention, in which a heat storage body 3 constituting at least a part of a floor 2 in a room 1 is shown. The heating element 4 that generates heat by supplying electric energy to the floor 2 is buried, and a temperature measuring thermistor 5 for measuring the surface temperature of the floor is arranged at least on the surface of the floor 2, and the lower part of the floor 2 Alternatively, a heat storage type floor heating apparatus 10 in which a heat insulating material 6 is disposed on the lower surface of the floor so as to store heat from the heating element 4 in the floor by interrupting heat conduction to the outside. Then, during the period when the power rate is low, the heat storage element is energized to measure the accumulation of thermal energy, and during the period when the power rate is high, the operation to energize the heat storage element is stopped and the heat release from the heat storage element is used. To maintain the heating of the room At a time when the energizing operation on the heat storage element is stopped during a period in which the power rate is low, a predetermined time for the predetermined power supply time of the heat storage element is determined so that the temperature of the heat storage element reaches a desired temperature. Is selected, the energization start time for the heat storage element is determined with reference to the selected temperature change curve, and the energization operation is started for the heat storage element at the energization start time. In the heat storage type electric floor heating device 10, when the heat storage type electric floor heating device 10 is started to be used for the first time or after a long period of non-use, the operation of energizing the heat storage body 3 is started during a period in which the electricity rate is low. Then, regardless of whether or not the period in which the power rate is low ends, whether or not the surface temperature of the heat storage unit 3 reaches a predetermined desired temperature, the heat storage type electric floor that continues the energizing operation. Heating control system Temu is shown.

The heat storage element constituting at least a part of the floor used in the heat storage type electric floor heating system according to the present invention is desirably the frame itself constituting the building, and specifically, And the frame is concrete. In other words, in the present invention, considering that a structure having a simple structure, a low manufacturing cost, and a large heat capacity and a high heat storage property is used as a heat storage body, the frame itself occupying the basic part of the building is stored in the heat storage body. It has been found that the most efficient and low-cost regenerative electric floor heating system can be used as a body.

When such a frame is used as the heat storage unit 3, the frame generally has a large heat storage capacity. Therefore, when the heat storage type electric floor heating system is used for the first time after the completion of construction, or during one season, When the season for using the regenerative electric floor heating system comes to an end after a long period of non-use and the use of the regenerative electric floor heating system is started, the heat storage body composed of the frame of the regenerative electric floor heating system has a heat capacity. Since it is large, it takes time until the surface temperature of the target heat storage unit or floor becomes a predetermined set temperature from the start of the energizing operation, and in the energizing operation using a period during which the nightly electricity rate is low, However, there is a problem that the power supply operation must be performed every day for several days to several weeks in some cases without reaching the set temperature.

That is, as shown in FIG. 4 (B), in the prior art, when the operation of supplying electricity to the heat storage body is first started, in the heat storage step C1 using the first nighttime electric power,
Although the surface temperature of the heat storage body or the surface temperature of the floor part rises with time as shown in the graph P, it does not reach the predetermined target temperature Tm, and the first heat radiation period H1 In this case, the surface temperature of the heat storage body or the surface temperature of the floor decreases.

In the present invention, the surface temperature of the heat accumulator may be detected, or the surface temperature of the floor may be detected. Although the description will be made in the context of detecting the temperature, the invention is not limited to this. Next, in the second night-time heat storage step C2, the surface temperature of the heat storage body rises with time as shown in the graph P, but still does not reach the predetermined target temperature Tm. Similarly, in the second heat radiation period H2, the surface temperature of the heat storage body decreases.

The above steps are repeated the third and fourth heat storage steps and the heat release step, and are repeated several or more than ten times until the target temperature Tm is reached. It is in a state where sufficient indoor heating cannot be secured. Therefore, in the present invention, as shown in the graph Q of FIG.
In the case of starting to use 0 for the first time or after a long period of non-use, the energizing operation is started in the heat storage step C1 in which the energizing operation is performed on the heat storage unit 3 during the period when the electric power price is low. Regardless of whether or not the period ends, the surface temperature of the heat storage body 3 becomes the predetermined desired temperature Tm.
Until the power storage operation is performed, the energization operation to the heat storage element 3 is continued even when the period of high power rate is entered after the end of the heat storage process C1. When the surface temperature of the heat storage body reaches a predetermined target temperature Tm, an additional heat storage step CX for stopping the power supply operation is provided.

In other words, according to the present invention, when starting up the regenerative electric floor heating system, the power supply operation is forcibly continued once regardless of whether or not the period for which the electricity rate is low. The surface temperature of the heat storage body is raised to a predetermined target temperature Tm. After that, as shown in a graph Q of FIG. 4A, a proper state is passed through a first heat radiation process H1, a second heat storage process C2, and a second heat radiation process H2 for an appropriate period. The process is shifted to the heat storage type electric floor heating control method.

Therefore, in the first embodiment of the present invention, since the daytime electric power is used in the first start-up process of the regenerative electric floor heating system, the cost is somewhat increased. Since the surface temperature of the heat storage body 3 can reach the predetermined target temperature Tm at an early stage, and the subsequent operation can be controlled exclusively by using the nighttime electric power, it is much different from the conventional method. This will contribute to cost reduction.

That is, as an example of a specific configuration according to the first aspect of the present invention, even if the temperature of the heat storage body reaches a predetermined desired temperature once, it is performed after that. If the surface temperature of the heat storage unit does not reach a predetermined desired temperature at the time when the energizing operation on the heat storage unit in the period in which the power charge is low is completed, the above-described power charge is low. From the start of energizing operation to the heat storage element during the period, regardless of whether or not the low power rate period ends, until the surface temperature of the heat storage element reaches a predetermined desired temperature. A regenerative electric floor heating system characterized by repeating an operation for continuing the energizing operation.

Next, as a second embodiment of the regenerative electric floor heating system according to the present invention, a heat storage electric floor heating system is selected from a plurality of types of predetermined temperature change curves at the end of a period in which the electricity rate is low. When selecting one temperature change curve in which it is predicted that the body is at a desired surface temperature, and in accordance with the start time of energization of the selected temperature change curve, when starting the energization to the heat storage body, This is a regenerative electric floor heating system in which the time at which energization of the regenerator is started is changed according to the material of the regenerator or the age of the regenerator.

That is, as described above, the heat storage element 3 has a delicate change in heat storage characteristic and heat radiation characteristic due to its material, capacity, aging, and the like. Room temperature control is also affected, so to perform more accurate and stable room heating temperature control,
It is necessary to introduce a control system that takes such factors into account.

For example, as shown in FIG. 5, the above-mentioned reference temperature change curve a of the heat storage body 3 has a different thermal time constant depending on the material or capacity of the heat storage body 3, that is, thickness, area, etc.
Even if the operation of energizing a certain heat storage unit 3 is started, the rise time of the surface temperature of the heat storage unit 3 may be delayed or earlier due to the thermal time constant inherent to the heat storage unit 3. 5
Shows an example in which the rise time of the surface temperature of the heat storage body 3 is delayed on average by tx time from the reference temperature change curve a.

Therefore, in such a case, it is necessary to correct the characteristic of the temperature change curve a by correcting the energizing operation start time to a time earlier by the time tx. That is, in the present invention, necessary correction data is obtained in advance for the material and capacity of the heat storage unit 3 and these data are stored in an appropriate storage unit. The correction data is called out from the storage means whenever necessary, and the control means corrects the selected reference temperature change curve a to accurately predict the start time of the energization operation to the heat storage element 3. It is what we did.

Further, in the present invention, it has been found that the above-mentioned thermal time constant is also different due to the aging of the material of the heat storage body 3, so that the material of the heat storage body 3 The thermal time constant responding to the change with time is also stored in an appropriate storage means, and is called from the storage means as necessary, and the control means corrects the selected reference temperature change curve a. In this way, the start time of the energization operation to the heat storage unit 3 is accurately predicted.

FIG. 6 shows how the temperature change curve a changes with the aging of the material of the heat storage body 3.
That is, since the frame contains a large amount of water when the construction is completed, the initial temperature change curve has a relatively slow rise, and the graph a in FIG. 6 shows the state. As the temperature increases, the rise of the temperature change curve becomes faster, and the temperature change curve shows a temperature change curve as shown by a graph a1 in FIG.

On the other hand, if the skeleton changes over time and the material deteriorates, the rise of the temperature change curve becomes extremely poor, and the temperature change curve shows a temperature change curve as shown by a graph a2 in FIG. Therefore, in the present invention, a parameter indicating a change in the thermal time constant associated with a change in the material of the heat storage body 3 is obtained in advance, and the parameter is stored in the storage means. Is used to correct the temperature change curve to predict the start time of the energizing operation.

That is, in the second aspect according to the present invention, the time at which the energization of the heat storage body is started is earlier or later than the designated energization start time of the selected temperature change curve. Is what you do. In addition, in the heat storage type electric floor heating system according to the present invention, in order to obtain the temperature change curve of the heat storage body 3, as described above, the surface temperature of the heat storage body 3 or the surface temperature of the floor portion 2 is determined. During the energization operation, measurement is performed sequentially, for example, sampling is performed every 5 minutes, and the measurement result is stored in an appropriate storage unit 30, and a primary temperature change curve is created based on the data.

Next, a plurality of such primary temperature change curves are collected to determine an average reference temperature change curve. As such a primary temperature change curve, a reference temperature change curve representing an average value of each temperature change curve formed by one-day data, for example, based on a temperature change curve for one week, that is, seven days. Is to create.

By repeating such data processing operations every day, a reference temperature change curve obtained by averaging the temperature change curves for the preceding seven days is formed for each day. The plurality of types of reference temperature change curves are stored in an appropriate storage unit 3.
After they have been created by the use of 0, they are stored in the storage means 31 comprising an appropriate table. When operating the regenerative electric floor heating system, a temperature change curve suitable for a desired set temperature in the room is selected from the temperature change curves stored in the table, and the temperature environment and other factors are determined. In addition, an appropriate temperature change curve is selected, and the selected temperature change curve is appropriately corrected and corrected using an appropriate variation parameter as needed. This is to start the energizing operation.

Next, a third embodiment of the regenerative electric floor heating system according to the present invention will be described. The concrete configuration of the third embodiment of the present invention is as described above. After the operation of energizing the heat storage unit 3 is completed, the surface temperature of the heat storage unit after the heat storage unit 3 starts radiating heat is sequentially measured, and the data of the surface temperature of the heat storage unit as shown in FIG. A heat radiation characteristic curve D is obtained, and an average heat storage element 3 is obtained from the heat radiation characteristic curve D of the heat storage element 3 for several consecutive days.
Of the reference heat radiation characteristic curve Do of the predetermined storage means 30
And compares the expected surface temperature of the heat storage element 3 indicated by the reference heat radiation characteristic curve Do with the current surface temperature of the heat storage element 3 sequentially measured after the end of the energizing operation. The difference (Δt) between the present surface temperature of the heat storage unit 3 and the predicted surface temperature of the heat storage unit 3 at the same time indicated by the reference heat radiation characteristic curve Do is equal to or greater than a predetermined value. In the case of, the power supply operation is forcibly started to control the current surface temperature of the heat storage unit 3 so as to match the temperature indicated by the reference heat radiation characteristic curve Do. It is a heat storage type electric floor heating system.

That is, in the third mode of the present invention, after the end of the period in which the electricity rate is low, the room temperature is maintained at a predetermined condition by utilizing the heat radiating action of the heat storage body. However, in the case where the temperature environment of the outside air changes extremely and the external temperature suddenly drops, for example, the heat storage body 3 is related to the target set temperature. With only the heat radiation effect, the heat retention capability is insufficient, and as a result, the room temperature cannot be maintained at the predetermined setting condition, and the occupants of the room feel cold.

In order to solve such a problem, in the present invention, even if the period in which the power rate is low ends, the energization operation is stopped, and the heat storage unit 3 enters the heat radiation process H1,
The surface temperature t of the heat storage unit 3 is configured to be continuously sampled by the temperature detection unit 5, and the sequential temperature data of the measured surface temperature of the heat storage unit 3 as shown in FIG. A heat radiation characteristic curve D of the heat storage body is obtained.

As in the case of obtaining the above-mentioned temperature change curve, the heat radiation characteristic curve D is obtained by calculating the average heat storage element 3 from the individual heat radiation characteristic curves D of the heat storage element 3 for several consecutive days or several tens of days. It is desirable to obtain the reference heat dissipation characteristic curve Do. Here, under a certain temperature environment condition, the temperature change selected so that the surface temperature of the heat storage unit 3 at the time when the energization operation is completed becomes a predetermined target set temperature Tm. When the temperature control of the regenerative electric floor heating system is executed using the curve a and the reference heat radiation characteristic curve Do, and the temperature environment condition changes rapidly, and the temperature of the outside air drops extremely. In this case, the surface temperature of the heat storage body during the heat radiation period did not ride on the curve of the reference heat radiation characteristic curve Do, but gradually separated from the reference heat radiation characteristic curve Do as shown in the heat radiation characteristic curve D '. You will draw a curve.

As a result, the heat radiating ability of the heat storage element 3 is reduced, and it becomes difficult to maintain the indoor temperature condition at a predetermined condition. As shown in FIG. Expected surface temperature t of the heat storage body 3 indicated by the characteristic curve Do
And the current surface temperature t ₁ of the heat storage body 3 in the heat radiation step.
Is compared with the current surface temperature of the heat storage element 3 and the heat storage element 3 at the same time indicated by the reference heat release characteristic curve Do.
When the difference (Δt = t−t ₁ ) from the surface predicted temperature t becomes equal to or greater than a predetermined value, the power supply operation is forcibly performed despite the high power charge period. Is started, and the surface temperature t ₁ of the heat storage body 3 at present is controlled so as to coincide with the temperature t indicated by the reference heat radiation characteristic curve Do.

When the surface temperature t ₁ of the heat accumulator 3 coincides with the temperature t indicated by the reference heat radiation characteristic curve Do, the forcible energizing operation is stopped, and the process returns to the discharging step H1 '. . Such an operation may be performed at any stage of the heat dissipation process, or may be repeatedly executed within the same heat dissipation process.

FIG. 8 is a schematic diagram showing one specific configuration of the drive control means used in the heat storage type electric floor heating system according to the present invention, and the surface temperature of the heat storage body 3 or the floor 2 is measured. Temperature measuring circuit section 34 having temperature detecting means 8
The temperature measuring circuit section 34 has a temperature detecting means 8 composed of a plurality of thermistors, and the sampling data from each of the temperature detecting means 8 is converted by a sensor selecting means 35 constituted by a multiplexer. The signals are individually selected and input to the main control means 20 via an analog / digital conversion circuit 36 including an A / D converter.

The control means 20 comprises a CPU 21 and a storage means 30 comprising a ROM 31 and a RAM 32 connected to the outside thereof, and a clock information generating means 33 at the same time. Further, the drive control means according to the present invention is provided with an energization control circuit section 37 for executing an energization operation on the heating element 4 provided on the heat storage element 3. For example, a relay switch 40 is provided for each of the heating elements 4 so that power can be individually supplied to each of the heating elements 4, and each of the relay switches 40 is controlled by a control unit 20 including the CPU. In response to the signal, the relay driver 39 that drives the individual relay switch 40 via the channel selection circuit 38 performs ON / OFF control on the supply of electric energy from the appropriate power supply 51 to the heat storage unit 3. .

On the other hand, the control means 20 stores the data in the ROM 31 or the RAM 32 based on the input data from the operation section 50 composed of the appropriate switch means 51 and the appropriate display means 52 and 53 composed of LEDs or LCDs. From the stored various temperature change curve data, heat radiation characteristic curve data, thermal time constant parameter, and time information, select a required reference temperature change curve or reference heat radiation characteristic curve,
Further, using the necessary thermal time constant parameter, the reference temperature change curve is corrected, and based on the result, the power supply operation start time of the heat storage type electric floor heating system is determined, and the power supply control circuit unit 37 Provide necessary control information.

The control means 20 sequentially samples the temperature data from the temperature measurement circuit section 34,
The above-described reference temperature change curve or reference heat radiation characteristic curve is created and stored in a storage means such as the RAM 32. Operation unit 5
Based on the input data from 0, the CPU 21
Various programs stored in the RAM 31 or the RAM 32, temperature change curve data, heat radiation characteristic curve data, appropriate correction parameters, and the like are read out, and arithmetic processing is executed. The floor heating system is driven.

In the regenerative electric floor heating system according to the present invention, the temperature data of the regenerator 3 measured by the control means 20 and the like are transmitted to an external display means via an appropriate measurement output means 53. It can also be displayed. FIG. 9 is a flowchart showing a basic main processing step when the temperature control method of the regenerative electric floor heating system according to the present invention is executed. When input, each control means in step (2),
Initialization of the storage means is performed, and the process proceeds to step (3).
Check that the time is displayed correctly.
If the current accurate time is not displayed, a time adjustment operation is performed.

Thereafter, the process proceeds to step (4), where environmental information such as outside air temperature, weather, humidity, etc., for operating the regenerative electric floor heating system is input from the operation unit 50, and the various types of information are input. In step (5), at least one of the reference temperature change curve and the reference heat radiation characteristic curve required in the control means 20 is selected from the storage means 30 and set in the control means. Then, energization is started at the energization start time.

Next, in step (6), the surface temperature of the heat storage body 3 or the surface temperature of the floor portion is measured individually and at predetermined time intervals, for example, through the respective sensors of the temperature measuring circuit 34, for example. Sampling every 5 minutes, etc., informing the control means 20 of the result, performing predetermined processing in the control means 20, and creating necessary reference temperature change curve information or reference heat dissipation characteristic curve Then, it is stored in the storage means 30. That is, in step (6), learning data for obtaining a current temperature change curve for each heat storage element 3 is collected.

In particular, the heat storage 3 in the heat radiation process
The sampling of the surface temperature is also used for determining whether or not to perform the forced additional cooking operation in the third embodiment. Next, in step (7), one heat storage element 3 whose one of the temperature sensors used in the heat storage type electric floor heating system monitors the surface temperature is selected, and the time information is determined. Then, at the point in time when the period of the low electricity rate has been reached, the control of the supply of electric energy to the heat storage unit 3 is started.

In the present invention, a plurality of heat storage bodies 3 may be used. In such a case, the steps (8) and (9) are performed for each of the heat storage bodies 3. The above control operation is executed in series or in parallel. Then, in step (10), after it is confirmed that the heat storage process has been started in each channel related to all the heat storage bodies, the process proceeds to step (11), and the nighttime power available time ends. It is determined whether or not the operation is NO, and the operation returns to step (7), and the above-described steps are repeated.
If it is ES, go to step (12) to turn off the power supply.
The process proceeds to step (13), and the heat radiation process is started.

Thereafter, returning to step (5), the above steps are repeated. Hereinafter, the above steps will be repeated daily. In the initialization process of step (2), it is checked whether the function of the temperature detection sensor used in the heat storage type electric floor heating system is normal, or each of the heat storage bodies 3 It is also possible to simultaneously check whether or not the heat generation processing channel of this embodiment operates effectively, or to perform a test operation of the system before actually starting the operation of energizing the heat storage body.

FIG. 10 is a flowchart showing an example of a specific control procedure of the regenerative electric floor heating system according to the present invention. That is, the procedure of step (5) and subsequent steps in the basic flowchart shown in FIG. 9 is described in more detail, and one of the plurality of sensors and heat storage bodies 3 used is one. The processing steps will be described only with reference to FIG.

That is, in step (101), the start time of the current supply operation to the heat storage element is determined, and step (10)
In step 2), it is determined whether or not the current time is the nighttime charge use time.
Repeat step 2). If YES, step (103)
The power supply to the heat storage element is started, and the surface temperature of the heat storage element is measured in step (104). In step (105), whether the current time is outside the night charge usage time If no, it is determined NO, the process returns to the step (104) and the above steps are repeated.
If YES, the process proceeds to step (106), and it is determined whether or not the surface temperature of the heat storage unit 3 matches the target set value. If YES, the process proceeds to step (109) and the process proceeds to step (109). Is turned off.

On the other hand, if NO in step (106), the flow advances to step (107) to continue the energizing operation for forcibly raising the temperature of the heat storage unit 3. Next, proceeding to step (108), it is determined whether or not the surface temperature of the heat storage body 3 matches the target set value. If NO, the process of step (107) is repeated, and if YES, If it is, the process proceeds to step (109) and the power supply to the heat storage unit 3 is turned off.

Then, the process proceeds to step (110) to start the heat radiation process. In step (111),
The surface temperature of the heat storage body 3 in the heat radiation process is measured,
In step (112), a difference value Δt = tt ′ between the current surface temperature t ′ of the heat storage element 3 and the expected surface temperature t of the heat storage element 3 at the same time indicated by the reference heat radiation characteristic curve. Is calculated, and in step (113), the difference value Δ
It is determined whether or not the value of t is equal to or greater than a predetermined value. If NO, the process proceeds to a step (116). If YES, the process proceeds to a step (114). An energization operation in the daytime is performed on the heat storage element 3 to perform the additional cooking process, thereby increasing the surface temperature of the heat storage element 3 and increasing the heat storage capacity of the heat storage element 3.

Next, proceeding to step (115), it is determined whether or not the current surface temperature t 'of the heat storage body 3 and the expected surface temperature t of the heat storage body 3 at the same time indicated by the reference heat radiation characteristic curve match. Is determined, and if NO, step (1)
Returning to 14), the additional cooking process is repeated, and if YES, the process proceeds to step (116), where it is determined whether or not the season for operating the regenerative electric floor heating system has ended. Returning to (102), the above steps are repeated, and if YES, the operation of the regenerative electric floor heating system is stopped.

[0056]

According to the present invention, since the above-mentioned technical configuration is adopted, the power is supplied to the heat storage body at the end of the period in which the electricity rate is lower than that of the conventional heat storage type electric floor heating system. When the operation is stopped, it becomes possible to set and maintain the surface temperature of the heat storage body at a predetermined set temperature almost accurately, and while having a simple and inexpensive configuration,
It is possible to realize a heat storage type electric floor heating system capable of accurately controlling the temperature of the room, and at the same time, when performing an energizing operation to the heat storage according to the material, capacity, or aging of the heat storage. Since the temperature change curve to be used uses the temperature change curve corrected and adjusted, a stable and accurate indoor temperature control system regardless of the material, capacity, or aging of the heat storage body is provided. It can be realized.

Further, in the heat storage type electric floor heating system according to the present invention, even if the heat storage body enters a heat radiation state after the operation of energizing the heat storage body, the surface temperature of the heat storage body can be reduced. The measurement is continued, and the change of the surface temperature of the heat storage body with time in the heat radiation state, that is, the heat radiation characteristic curve of the heat storage body indicating the decrease of the surface temperature is obtained, and the actual surface temperature of the heat storage body and the predetermined value are determined. If the difference from the heat dissipation characteristic curve of the heat storage body becomes larger than a predetermined value, the power supply operation is forcibly restarted for the heat storage body to supply electric energy to the heat storage body. Since the surface temperature of the heat storage body is adjusted and controlled to match the heat radiation characteristic curve of the heat storage body, for example, when the outside air temperature environment changes extremely, for example, when the outside air temperature drops rapidly In the heat storage body When the heat increases and the surface temperature of the heat storage body falls below the heat radiation characteristic curve of the heat storage body that is a predetermined reference, by restarting the energization operation, the surface temperature of the heat storage body is reduced. Since the temperature of the heat storage element is returned to the predetermined reference temperature, it is possible to realize a stable, accurate and comfortable indoor temperature control system irrespective of a change in the outside air temperature.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically illustrating the configuration of a heat storage type electric floor heating system according to the present invention.

FIG. 2 is a diagram for explaining a problem of a conventional heat storage type electric floor heating system.

FIG. 3 is a diagram for explaining an example of a method for predicting an energization operation start time using a temperature change curve and a heat radiation characteristic curve in a conventional heat storage type electric floor heating system.

FIG. 4 (B) is a graph illustrating a problem in a conventional heat storage type electric floor heating system.
(A) is a graph explaining the example of the temperature control method in the thermal storage type electric floor heating system in this invention.

FIG. 5 is a graph illustrating an example in which the energization operation start time is corrected based on the material and capacity of the heat storage body in the present invention.

FIG. 6 is a graph illustrating an example of a case where the energization operation start time is corrected based on aging of the heat storage body in the present invention.

FIG. 7 is a graph illustrating a reheating method in the regenerative electric floor heating system according to the present invention.

FIG. 8 is a block diagram showing a specific configuration of a heat storage type electric floor heating system according to the present invention.

FIG. 9 is a flowchart illustrating an example of a basic processing operation procedure of the regenerative electric floor heating system according to the present invention.

FIG. 10 is a flowchart showing a specific example of a processing operation in the regenerative electric floor heating system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Room 2 ... Floor member 3 ... Heat storage element 4 ... Heating element 5 ... Temperature detection means, temperature sensor 6 ... Heat insulation material 10 ... Heat storage electric floor heating apparatus 20 ... Control means 21 ... CPU 30 ... Storage means 31 ... ROM 32 ... RAM 33 ... Time measuring means 34 ... Temperature measurement circuit part 35 ... Sensor selection circuit 36 ... A / D converter 37 ... Electrification operation control circuit part 38 ... Channel selection means 39 ... Relay driver 40 ... Relay means 41 ... Power supply part 50 ... Operation Panel 51: Key switch 52: LED 53: LCD 54: Measurement output means

Claims (8)

[Claims] A heat generating element that generates heat by supplying electric energy to a heat storage element that constitutes at least a part of a floor in a room is buried, and at least the surface temperature of the floor is at least on the surface of the floor. A heat insulating material is placed on the lower surface of the floor so as to store heat from the heating element in the floor by disposing a temperature measuring thermistor for measuring the temperature and blocking heat conduction below or outside the floor. A heat storage type floor heating device having a cover disposed thereon, in which a power supply operation is performed during a period in which a power rate is low to measure heat energy accumulation, and a power supply operation is performed in the heat storage body during a period in which a power rate is high. When stopping to maintain the heating of the room using the heat radiation from the heat storage body, the temperature of the heat storage body at the time of stopping the energizing operation on the heat storage body during the period when the power rate is low, Desired temperature Is selected, a predetermined temperature change curve for a predetermined power supply time of the heat storage element is selected, and the power supply start time for the heat storage element is determined with reference to the selected temperature change curve. Determined, in the heat storage type electric floor heating device configured to start the current supply operation to the heat storage unit at the current supply start time, use the heat storage type electric floor heating device first or after a long period of non-use. In this case, the surface temperature of the heat storage element is set to a predetermined desired value regardless of whether the power storage operation is started during the period in which the power rate is low and whether or not the period in which the power rate is low ends. A heat storage type electric floor heating control system, wherein the power supply operation is continued until the temperature of the electric floor is reached. 2. Even if the temperature of the heat storage material once reaches a predetermined desired temperature, when the energization operation to the heat storage material is completed during a period in which the electricity rate to be performed thereafter is low, If the surface temperature of the heat storage body has not reached a predetermined desired temperature, the operation of energizing the heat storage body is started during the period when the power rate is low, and then the period during which the power rate is low. 2. The heat storage type according to claim 1, wherein the operation of continuing the energizing operation is repeated until the surface temperature of the heat storage body reaches a predetermined desired temperature regardless of whether or not the heat storage is completed. Electric floor heating system. 3. One of a plurality of types of predetermined temperature change curves, which is predicted to be at a desired surface temperature of the heat storage body at the end of a period in which a power rate is low. A curve is selected, and in accordance with the energization start time of the selected temperature change curve, when the energization of the heat storage body is started, the time at which the energization of the heat storage body is started is determined by the material or the age of the heat storage body. The regenerative electric floor heating system according to claim 1 or 2, wherein the electric floor heating system is changed in accordance with the change. 4. The time when the heat storage element is started to be energized is
4. The regenerative electric floor heating system according to claim 3, wherein the system starts earlier or later than a designated energization start time of the selected temperature change curve. 5. After the energizing operation for the heat storage unit is completed, the surface temperature of the heat storage unit after the heat storage unit starts radiating is sequentially measured, and a heat radiation characteristic curve of the heat storage unit is obtained from the data. In addition, an average heat storage element reference heat radiation characteristic curve is obtained from the heat storage element heat radiation characteristic curve for several consecutive days, and stored in predetermined storage means. The expected surface temperature is compared with the current surface temperature of the heat storage body which is sequentially measured after the end of the energizing operation, and the current surface temperature of the heat storage body is determined by the reference heat radiation characteristic curve. When the difference from the predicted temperature of the surface of the heat storage body at the same time as shown above becomes equal to or more than a predetermined value, the power supply operation is forcibly started, and the surface of the heat storage body at the present time is started. Temperature is equal to the temperature indicated by the reference heat radiation characteristic curve. 2. The regenerative electric floor heating system according to claim 1, wherein the electric floor heating system is controlled such that the electric floor heating is performed in a manner as described above. 6. The regenerative electric floor heating system according to claim 5, wherein the forcible energizing operation is performed during a period in which a power rate is high. 7. The heat storage type electric floor heating system according to claim 1, wherein the heat storage body forming at least a part of the floor portion is a frame itself forming a building. 8. The regenerative electric floor heating system according to claim 7, wherein the frame is made of concrete.