JPH10141683A - Method for controlling temperature of face-type heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain power consumption low by efficiently using power without generating overcurrent even if a starting operation is conducted by effectively starting a plurality of heaters in a face-type heater having a self-temperature regulating function for generating a transient state and thereafter a steady state. SOLUTION: In the face-like heater having a transient state that a temperature rises to a predetermined value after energizing and a steady state that a resistor is changed to a predetermined resistance value to maintain the predetermined temperature, one heater 1 is transferred to the steady state without starting other heaters when the heater is the transient temperature. Then, after the one heater is transferred to the steady state, the other heaters are sequentially not started when any of the other heaters is the transient temperature, and started only when the other heaters are the steady states. And, when the respective heaters are the steady states, they are started to alternately repeat predetermined ON time and OFF times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the temperature of a planar heating element installed on a floor or a wall surface to heat a room.

[0002]

2. Description of the Related Art In recent years, a sheet heating element molded in a band shape on a floor or a wall surface as a room heating is buried in a case or the like, and an AC power supply is connected to an electrode wire in the sheet heating element. 2. Description of the Related Art A heating panel that generates heat from a sheet-shaped heat generating material and heats a room is used. As these sheet-like sheet heating elements, for example, those in which an inorganic or organic heating element having a self-temperature control function is sandwiched inside a belt-shaped sheet, and power is supplied from a power supply by connecting electrode wires. is there.
Recently, it has become necessary to upgrade the floor heating of each room for each room of each member of the family, or to upgrade the floor heating of the floor. In fact, there are many cases where a plurality of sheet heating elements are actually installed in one house or business place.

[0003]

[Problems to be solved by the invention] In the above case,
Although the planar heating elements have a self-temperature adjusting function, if they are put into use at once, large power is required immediately, an overload current flows, and the breaker opens. For this reason, in homes and offices that require multiple heating elements, or especially in the cold and cold regions of Tohoku, Hokkaido and other areas, power line work must be performed to switch to a large current service line each time. However, during the construction time, there is a problem that the electric equipment and the like are forced to be in an unusable state, and the user is burdened with a great economic burden. In addition, even when there is a demand to use a plurality of planar heating elements, power line replacement work has to be performed, which has been a factor that necessitates the reluctance to adopt the technology without patience. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a plurality of sheet heating elements having a self-temperature control function for generating a transient state and a steady state thereafter. The heating element can be activated,
It is another object of the present invention to provide a temperature control method for a sheet heating element that can maintain low power consumption by efficiently using power without causing an overcurrent even when a start-up operation is performed.

[0005]

Means for Solving the Problems To achieve the above object, the invention according to claim 1 includes a transient state in which heat is generated after energization and rapidly rises to a certain temperature within a predetermined time, and a predetermined time elapses. After that, even if a voltage is applied, the resistance value changes to a predetermined resistance value and maintains a predetermined temperature. When the heating element is in a transient state, the heating element is shifted to a steady state without activating the other heating element. After the heating element is shifted to the steady state, another heating element is sequentially set. The body is not activated when any of the other heating elements are in a transient state, and is activated only when the other heating element is in a steady state. Alternate time Composed of the temperature control method of a planar heating element made by activated to.

Further, in the invention according to claim 2, when the plurality of heating elements are in a steady state, they may be turned on and off in a complementary manner so as not to overlap each other.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The temperature control method for a sheet heating element according to the present invention includes a transient state in which heat is generated after energization and rapidly rises to a certain temperature within a predetermined time, and a voltage is reduced after a predetermined time has elapsed. A planar heating element comprising a self-heating element having a steady state in which the resistance value changes to a predetermined resistance value and maintains a predetermined temperature even when the heating element is used is used. The present invention is characterized by a method of controlling the temperature of the sheet heating element for activating a plurality of used sheet heating elements and simultaneously operating the plurality of systems.
One of these planar heating elements is activated, and when the heating element is in a transient state, the state is shifted to a steady state without activating the other heating elements. Then, after this one heating element is shifted to the steady state, the other heating elements are not sequentially activated when any other heating element is in the transient state, and when the other heating element is in the steady state, only,
When each heating element is in a steady state, the heating element is started so that a predetermined ON time and OFF time are alternately repeated.

[0008] A plurality of sheet heating elements can be reliably started even as an overcurrent breaker of about 30 amperes for ordinary households without the necessity of replacing a power line for passing a large current.
And it can be operated simultaneously.

When the plurality of heating elements are in a steady state,
Instead of simply activating the on-time and the off-time alternately, the on-time and the off-time may be complementarily activated so as not to overlap each other. During the steady state operation of a plurality of sheet heating elements, another sheet heating element can be reliably added and activated.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic plan view showing the construction of a sheet heating element according to an embodiment of the present invention. For example, a unit is placed on the floor of a room of about 8 tatami mats equipped with a range, a sink, an exhaust port, etc. of a general household. Planar heating elements 10a, 10b, 10c. . .
Are connected in parallel in units of three, and the planar heating elements 12, 14, 16 of the A system, the B system, and the C system are connected and arranged. Then, a tatami mat or a carpet, for example, is laid from above these planar heating elements, and is used in real life or a business establishment.

This planar heating element includes a transient state in which heat is generated after energization and rapidly rises to a certain temperature within a predetermined time, and after a predetermined time has elapsed, the resistance value changes to a predetermined resistance value even when a voltage is applied. And a self-regulating heating element having a steady state for maintaining a predetermined temperature. This self-temperature-regulating heating element has a preset heating temperature (45 ° C. to 80 ° C.) unique to each element, and can be adjusted without a temperature control device such as a thermostat. is there.

The self-heating element is an inorganic or organic heating element such as a barium titanate-based heating element or an organic polymer compound-graphite mixed heating element. A panel formed by embedding layers together with electrodes in a belt-like sheet made of vinyl chloride, nylon, or the like is preferably used. The polyethylene glycol-graphite mixture has a sharp positive characteristic peak temperature and is easy to set.

The self-regulating heating element in the embodiment is formed of conductive potassium titanate whiskers and a polymer. That is, the self-heating element is bound with a water-repellent polymer, so that it can be easily manufactured in a large area. And
Depending on the place of use and application, for example, length 10m, width 40
It can be configured as a sheet-like planar heating device having a large area of about 0 mm.

FIG. 2 is a graph showing the temperature-electrical resistance characteristic of the self-heating element when energized. When a voltage is applied to the self-heating element, the temperature of the heating element is increased by Joule heat. As a result, the current value decreases as a result of the resistance value of the heating element rapidly increasing in a quadratic curve. Therefore, after the start of energization, the temperature of the heating element rises with time, but reaches a certain steady temperature in a short time,
Thereafter, the current value is stabilized at a low and substantially constant value. Here, the planar heating elements 12, 14, 16 composed of such self-temperature-regulating heating elements include a transient state in which heat is generated after energization and rapidly rises to a certain temperature within a predetermined time, and a predetermined time. After the lapse of time, even if a voltage is applied, the resistance value changes to a predetermined resistance value and a steady state is maintained in which a predetermined temperature is maintained.

The range between the transient state and the steady state is appropriately set according to the resistance-temperature characteristics of the element. In the embodiment, a state until the self-temperature rises from the ambient temperature to about 35 to 80 degrees can be set as a transient state. In this state, the resistance value sharply increases as shown in the figure, and the current value is gradually reduced correspondingly.
As can be seen from FIG. 5, when the temperature exceeds 80 ° C., the resistance value greatly increases, and the current value greatly decreases. As a result, the self temperature decreases. Thereafter, the self temperature is maintained in the range of 45 ° to 80 °. Thus, the self-temperature control function is performed. In this embodiment, for example, the self-temperature up to 35 degrees is set as the transient state.

FIG. 3 is a schematic block diagram showing an embodiment of a temperature control method for a sheet heating element according to the present invention.
18, storage unit 20, display unit 22, timer 23, system linking units 24a, 24b, 24c, and switch units 26a, 26b for performing switching operations on the planar heating elements 12, 14, 16 of A, B, C, respectively. , 26c to activate each planar heating element.

The storage unit 20 is provided with a ROM in which a control procedure of the temperature control method according to the present embodiment is stored in advance as a program, and a RAM in which instruction contents corresponding to a panel operation are stored. The CPU 18 performs a control operation comprehensively, calls a program in the storage unit as needed, and performs a predetermined operation control. In addition, a timer is built-in, and a predetermined delay activation of the sheet heating element is performed. Display 22
Then, on / off states of the connected sheet heating elements 12, 14, 16 and various mode states and other information necessary for external display are displayed on a panel-shaped display device. And CP
The operation result from U is transmitted to the system linking units 24a, 24b, 24c.
And the switch units 26a, 26b, 26c
And performs predetermined switching. The switch units 26a, 26b, 26c have 100V to 200V
A, B, C sheet heating elements 12, 14, connected to a power supply,
16 is connected, and power supply is turned on and off in response to switching.

FIGS. 4 and 6 to 8 are a timing chart and a flowchart for explaining a characteristic portion of the temperature control method for the sheet heating element according to the present invention. In FIG. 6, the power supply of the controller 28 is turned on. And the ABC signal for starting the A system is output to the CPU 18, and the A system timer 23a is set in response to the fall of the signal.
Set for minutes. At the time of turning on the power, it may be possible to first select whether to operate only a single system or to operate a plurality of systems.

At the same time as the output of the ABC signal, the planar heating element 12 of the A system is activated, and power is supplied to enter a transient state. In this transient state, the relationship between temperature and electric resistance changes approximately proportionally up to about 35 degrees due to the characteristics of the self-temperature-regulating heating element of the planar heating element described above, but the resistance value sharply increases from about 35 degrees. To increase.

In FIG. 5, the power consumption in the transient state is reduced from 350 W / h at the first startup to about 270 to 175 W / h after 6 minutes. After 6 minutes from the start, the self-temperature of the sheet heating element becomes about 3
It has reached about 5 degrees. When the first ABC signal arrives after the elapse of 6 minutes as the transient state, the A-system planar heating element 12 ends the transient state and enters the steady state (temperature control mode). In this steady state, the A-system planar heating element 12 is turned on and off, for example, so as to alternately repeat an on time of 30 seconds and an off time of 60 seconds, and continues. In FIG. 5, in this steady state, the power consumption is maintained at 100 to 200 W / h.

On the other hand, in FIG.
After the elapse of the six-minute transient state, the BCA signal is output to the CPU 18 in synchronization with the arrival of the first ABC signal. At this time, the timer 23b of the B system is set, and a delay time of 6 minutes is calculated. Simultaneously with the output of the BCA signal, the planar heating element 14 of the B system is activated, and power is supplied, so that the B system planar heating element enters a transient state. When starting the B-system sheet heating element, A
Since the power consumption of the system is 270 W / h at the maximum, it is maintained at 620 W / h even at the moment of startup, and is approximately 6.2.
A current can be maintained. Then, when the first BCA signal arrives after the timer set time ends six minutes after startup, the B-system planar heating element 14 ends the transient state,
Reach steady state mode. Then, in this steady state mode, the on / off start-up is performed again so that the 30-second on-time and the 60-second off-time are alternately repeated, and continue. In FIG. 5, in this steady state, both the A and B systems are operating simultaneously.
It can be understood that even at the maximum value, the power consumption is 400 W / h, and the power consumption can be kept very low.

Further, referring to FIG.
After the elapse of the six-minute transient state, the CAB signal is output to the CPU 18 in synchronization with the arrival of the first BCA signal. At this time, the timer 23c of the C system is set, and a delay time of 6 minutes is calculated. At the same time as the output of the CAB signal, the C-system planar heating element 16 is activated, power is supplied, and the C-system planar heating element enters a transient state. When starting the C-system planar heating element, A
And the total power consumption of system B is about 400 W /
Since it is h, it is maintained at 750 W / h even at the moment of startup, and a current of about 7.5 A flows. Therefore, even if another electric appliance is used, even if the overcurrent breaker for the power supply in the house or building is used with a rating of 30 amperes, it can be started stably and reliably.

After the timer set time six minutes after the start of the C-system planar heating element 16, the C-system planar heating element 16
Ends the transient state and reaches the steady state mode. And
In this steady state mode, on and off are started and continued to alternately repeat the 30-second on-time and the 60-second off-time. Here, when the planar heating elements A, B, and C are all operated in a steady state, the operation is performed while alternately repeating the start energization of 30 seconds on and the 60 seconds off, and the pause.

Even when these three units A, B, and C operate simultaneously, the maximum power consumption is 600 W / h, and the power consumption is lower than that of a so-called electric heating device using ordinary power as a heat source. It can be greatly reduced. In the embodiment, the on-start and operation (energization) time in the steady state is 30 seconds, and the off non-operation (non-energization) time is 60 seconds. The predetermined time is, for example, 3 seconds: 87.
Sec, 6 sec: 84 sec. . . 45 seconds: 45 seconds, 60 seconds: 3
0 seconds,. . . Etc. may be arbitrarily set.

The timer set time, ie, the transient state, is set in accordance with the unique characteristics of each self-temperature control heating element. Further, depending on the combination method, instead of a uniform transient state time, a transient state time may be set to some extent elastically, for example, 10 minutes in the present embodiment.

The first ABC, BCA, and CAB after the timer delay time as a transient state ends.
The arrival time of the signal may be set arbitrarily. Further, the embodiment is not limited to the embodiment. For example, the timer calculation function may be executed by a timer with a built-in CPU.
Other arbitrary configurations may be used. If necessary, the display unit 22 may be provided with an operation panel, such as a power supply, various modes, a numerical value setting button, a current time, a good morning mode, a good night mode, or the like, so as to be easily operated from outside.

As described above, when one heating element is in a transient state, the other heating element is not activated when the heating element is in a transient state.
After the one heating element is shifted to the steady state, the other heating element is not activated when any other heating element is in the transient state. Only when the heating element is in a steady state, and when each heating element is in a steady state, it is started so as to alternately repeat a predetermined on-time and an off-time, without performing a special power line replacement work for high power. Even when a plurality of planar heating elements are simultaneously operated by a normal overcurrent circuit breaker, it is possible to prevent an overcurrent from flowing and prevent start-up from becoming impossible, and to reliably activate a plurality of planar heating elements. Become. In addition, in the steady state, the power consumption is extremely low due to the self-temperature control function of the heating element, so that simultaneous operation of a plurality of planar heating elements is ensured, power consumption is kept low, and power charges are kept low. Things.

In the embodiment, the planar heating elements 12, 14, and 16 of the A, B, and C systems are simply and repeatedly activated with a predetermined on-time and off-time alternately. For example, as shown in FIG. 9, the activation energization time may be complementarily or cyclically turned on and off so that the activation energization times do not overlap each other.
This makes it easier to manage the operating state, power consumption efficiency, and the like of each planar heating element of each system, and can reliably maintain low power consumption. In addition, when two or more sheet heating elements are activated in the steady state operation and another sheet heating element is activated, the power consumption during the steady state operation can be kept as low as possible. Start the body stably and reliably.

[0029]

As described above, according to the method for controlling the temperature of the sheet heating element according to the first aspect, a transient state in which heat is generated after energization and rapidly rises to a certain temperature within a predetermined time is included, and Temperature control that controls the temperature of a planar heating element consisting of a self-regulating heating element with a steady state in which the resistance changes to a predetermined resistance value and maintains a predetermined temperature even after voltage is applied after a lapse of time In the method, one heating element is shifted to a steady state without activating the other heating element when the heating element is in a transient state, and after shifting the one heating element to the steady state, the other heating elements are sequentially switched to another steady state. The heating elements are not activated when any of the other heating elements are in a transient state, and are activated only when the other heating elements are in a steady state. And off time alternately As a result, the overcurrent flows through the normal overcurrent circuit breaker during simultaneous operation of multiple planar heating elements without special power line replacement work for high power. As a result, it is possible to prevent the start-up from becoming impossible, and to reliably start the plurality of planar heating elements. In addition, while enabling the simultaneous operation of a plurality of sheet heating elements as described above, the power consumption is kept low by the self-temperature control function during the steady state operation of the plurality of sheet heating elements, and the amount of power is kept low. It has the effect of gaining.

According to the temperature control method of the planar heating element according to the second aspect, when the plurality of heating elements are in a steady state, they are turned on and off in a complementary manner so as not to overlap each other. This makes it easier to manage the operating state, power consumption efficiency, and the like of each planar heating element of the system, and can reliably maintain low power consumption. In addition, when two or more sheet heating elements activate another sheet heating element during the steady state operation, the power consumption during the steady state operation can be kept as low as possible. This has the effect of stably and reliably starting the body.

[Brief description of the drawings]

FIG. 1 is a schematic plan view illustrating an indoor arrangement state of a sheet heating element for implementing a temperature control method of the sheet heating element according to the present invention.

FIG. 2 is a graph showing an electrical resistance-temperature characteristic of a self-temperature-regulating heating element constituting the planar heating element according to the present invention.

FIG. 3 is a block diagram of an apparatus for implementing a temperature control method for a sheet heating element according to the present invention.

FIG. 4 is a timing chart illustrating a temperature control method for a sheet heating element according to the present invention.

FIG. 5 is a graph showing a heating temperature characteristic and a power consumption characteristic with respect to a time axis of a self-temperature adjusting heating element constituting the planar heating element according to the present invention.

FIG. 6 is a flowchart illustrating a method of starting and operating the A-system planar heating element according to the present invention.

FIG. 7 is a flowchart illustrating a method of starting and operating a B-system planar heating element according to the present invention.

FIG. 8 is a flowchart illustrating a method of starting and operating a C-system planar heating element according to the present invention.

FIG. 9 is a timing chart illustrating an on / off start state in a steady state of the temperature control method of the planar heating element according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 unit planar heating element 12 A-system planar heating element 14 B-system planar heating element 16 C-system planar heating element 18 CPU 20 storage unit 22 display unit 23a A-system timer 23b B-system timer 23c C-system timer 26a A system switch unit 26b B system switch unit 26c C system switch unit 28 Controller

Claims (2)

[Claims] The present invention includes a transient state in which heat is generated after energization and rapidly rises to a predetermined temperature within a predetermined time, and after a predetermined time elapses, the resistance value changes to a predetermined resistance value even when a voltage is applied, and the predetermined temperature increases. A temperature control method for controlling the temperature of a planar heating element composed of a self-temperature-regulating heating element having a steady state that maintains the following conditions: (1) one heating element, and another heating element when the heating element is in a transient state. After the one heating element is shifted to the steady state without being activated, the other heating element is sequentially stopped so that it is not activated when any other heating element is in the transient state. A method for controlling the temperature of a planar heating element, wherein the heating element is activated only when the heating element is in a steady state, and is activated such that a predetermined ON time and OFF time are alternately repeated when each heating element is in a stationary state. 2. When the plurality of heating elements are in a steady state,
2. The temperature control method for a planar heating element according to claim 1, wherein the on / off activation is performed complementarily so as not to overlap each other.