JPH05106853A - Electric heater - Google Patents

Abstract

PURPOSE:To provide an electric heater capable of ensuring comfortable warm sense even when it is used with an electric carpet and even when it is used over a long time. CONSTITUTION:Once the temperature of a heater is set by a temperature setting part 1, a setting temperature correction part 4 judges corrected temperature based upon the environmental temperature by temperature detection parts 2, 3, and adds or subtracts the corrected temperature to and from a heater T on the basis of the corrected setting temperature estimated by the set temperature correction part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heater, for example, an electric kotatsu, and more particularly to a device for controlling the temperature of the heating based on the ambient temperature.

[0002]

2. Description of the Related Art Conventionally, an electric kotatsu output control unit controls a heating element based on a set temperature of a temperature setting unit provided in a hand controller. For example, as shown in FIG. When the high temperature is set, the temperature inside the kotatsu is 70 ° C, and when the medium temperature is set, it is 55 ° C.
In addition, when the low temperature is set, the heating element is ON-OFF controlled so that the temperature in the kotatsu becomes 40 ° C.

[0003]

In the conventional electric heater as described above, when the warmer uses the warmer for a long time, the sense of warmth may be paralyzed. In such a case, the warmer was trying to confirm whether the heating was done or not, and raising the set temperature to obtain comfortable heating. Further, for example, when used in combination with an electric carpet, the inside of the kotatsu rises above the set temperature due to the heat of the electric carpet and becomes hot, which is not so liked by warmers. Whenever the inside of the kotatsu becomes hot, the temperature setting unit of the hand controller must be used to adjust the temperature each time, and the operation is troublesome.

The present invention has been made in order to solve the above problems, and provides an electric heater which can obtain a comfortable warmth even when used in combination with an electric carpet or used for a long time. The purpose is to

[0005]

An electric heater according to a first aspect of the present invention has a temperature setting unit for setting the temperature of the heater, a temperature detecting unit for detecting the ambient temperature, and a correction temperature set in advance. When the set temperature is set by the temperature setting unit,
The correction temperature is determined based on the ambient temperature detected by the temperature detection unit, and the set temperature correction unit that adds or subtracts the correction temperature to the set temperature and the correction set temperature obtained by the set temperature correction unit And an output control section for controlling heat generation of the heating element based on the above.

Further, the temperature detecting section comprises an indoor temperature detecting section for detecting an indoor temperature and a carpet temperature detecting section for detecting a temperature of an electric carpet during heating, and the temperature setting section sets the set temperature. At this time, the set temperature correction unit determines the correction temperature based on the room temperature and the carpet temperature, and adds or subtracts the correction temperature to the set temperature.

The electric heater according to the second aspect of the present invention includes a temperature setting unit for setting the temperature of the heater, a first temperature detecting unit for detecting the ambient temperature, and a second temperature detecting unit for detecting the temperature of the heater. When the temperature detection unit and the correction temperature are set in advance and the set temperature is set by the temperature setting unit, the correction temperature is determined based on the ambient temperature detected by the first temperature detection unit, and The upper and lower temperature limits are set by correcting the set temperature based on the corrected temperature to make it the upper limit temperature of the heater, and subtracting the preset temperature from the upper limit temperature as the lower limit temperature of the heater. Section and the heating element is heated with a predetermined electric power until the heater temperature detected by the second temperature detecting section reaches the upper limit temperature, and when the heater temperature reaches the upper limit temperature, the electric power is changed to the lower limit temperature. Fever by gradually decreasing until every predetermined time Fever is lowered of, when said heater temperature reaches the lower limit temperature is obtained by an output control unit which is adapted repeated again the heat generating operation.

Further, there is provided a stimulus output setting section for setting a stimulus output for raising the temperature of the heater at predetermined time intervals,
When the stimulus output is set, the output control unit sequentially lowers the electric power at predetermined time intervals until the heater temperature reaches the lower limit temperature to lower the heat generation of the heating element, and at the same time, a plurality of heaters are provided. The heating element is caused to generate heat with electric power based on the stimulation output over a number of times.

Further, the first temperature detecting section comprises an indoor temperature detecting section for detecting an indoor temperature and a carpet temperature detecting section for detecting a temperature of an electric carpet during heating, and is set by the temperature setting section. When the temperature is set,
The upper limit / lower limit temperature setting unit determines a correction temperature based on the room temperature and the carpet temperature, and corrects the set temperature based on the correction temperature to be the upper limit temperature of the heater, and from the upper limit temperature. The value obtained by subtracting the preset temperature is set as the lower limit temperature of the heater.

[0010]

In the first aspect of the invention, when the temperature of the heater is set by the temperature setting unit, the set temperature correction unit determines the correction temperature based on the ambient temperature detected by the temperature detection unit, The corrected temperature is added or subtracted. When the correction temperature is a positive value, the correction temperature is added to the set temperature, and when the correction temperature is a negative value, the correction temperature is subtracted from the set temperature to set the correction set temperature. The output control unit controls the heat generation of the heating element based on the corrected set temperature.

In the second invention, when the temperature of the heater is set by the temperature setting section, the upper and lower limit temperature setting sections are set by the first and second temperature setting sections.
The correction temperature is determined from the ambient temperature detected by the temperature detection unit, and the set temperature is corrected based on the correction temperature to set the upper limit temperature of heating, and the preset temperature is calculated from the upper limit temperature. Subtract and set the lower limit temperature for heating. The output control unit causes the heating element to generate heat with a predetermined electric power until the temperature of the heater detected by the second temperature detection unit reaches the upper limit temperature, and reaches the lower limit temperature when the temperature of the heater reaches the upper limit temperature. The electric power is sequentially reduced at predetermined time intervals to lower the heat generation of the heating element. Then, when the temperature of the heater reaches the lower limit temperature, the heating operation is controlled to be repeated again.

When the stimulus output is set by the stimulus output setting unit, the output control unit sequentially decreases the electric power at predetermined time intervals until the temperature of the heater reaches the upper limit temperature to the lower limit temperature, and the output control unit controls the heating element. The heat generation is lowered, and during that time, the heating element is caused to generate heat by electric power based on the stimulation output over a plurality of times.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the first invention, FIG. 2 is a temperature characteristic diagram of the embodiment, and FIG. 3 is a correction temperature obtained based on an indoor temperature and an electric carpet temperature Tc. Data.

In FIG. 1, reference numeral 1 denotes a temperature setting unit for setting a temperature of an electric kotatsu (hereinafter referred to as a "kotatsu temperature Tr") having keys for high temperature, medium temperature and low temperature (not shown). Is. Reference numeral 2 is an indoor temperature detection unit that detects the temperature inside the room, and 3 is a carpet temperature detection unit that detects the surface temperature of an electric carpet (not shown) (hereinafter referred to as "carpet temperature Tc").

The room temperature detector 2 is provided on the front surface of the hand controller, and the carpet temperature detector 3 is provided on the back surface of the hand controller so as to contact the electric carpet. A power key (not shown) for turning the power on / off is provided on the surface of the hand controller.
The temperature detection units 2 and 3 described above are, for example, thermistors and correspond to the temperature detection unit of the present invention.

Reference numeral 4 denotes a set temperature correction unit, which is a set temperature (high temperature: 70 ° C., medium temperature: 55) corresponding to each key of the temperature setting unit 1.
C., low temperature: 40.degree. C.), and a correction temperature (shown in FIG. 3) for correcting the set temperature based on the room temperature and the carpet temperature Tc is set. As shown in FIGS. 2 and 3, the correction temperature has an upper limit of + 6 ° C. with respect to the set temperature,
The lower limit has a temperature range of −6 ° C. and is selected within this range.

When the temperature is set by the temperature setting unit 2, the respective temperatures are input from the indoor temperature detecting unit 2 and the carpet temperature detecting unit 3, and the corresponding corrected temperature is determined from the two values. When the correction temperature is a positive value, the correction temperature is added to the set temperature, and when the correction temperature is a negative value, the correction temperature is subtracted from the set temperature to set the correction set temperature.

Reference numeral 5 denotes an output control section for controlling the heating element drive section 6 based on the corrected set temperature of the set temperature correction section 4, and the heating element drive section 6 supplies electric power to the heating element under the control of the output control section 5. Supply to 7. The heating element 7 is provided at the center of the back surface of the electric kotatsu yagura. Reference numeral 8 denotes a kotatsu temperature detection unit provided in the vicinity of the heating element 7, which detects a kot temperature Tr caused by the heat generated by the heating element 7 and outputs it to the output control unit 5.

The set temperature correction unit 4 and the output control unit 5 are assumed to be composed of, for example, a microcomputer. The set temperature and the corrected temperature set in the set temperature correction unit 4 are stored in a memory (not shown), and the determination and arithmetic processing of the set temperature correction unit 4 and the control of the output control unit 5 are controlled by a CPU (not shown). ) Will do.

The operation of the above-described structure when used in combination with an electric carpet will be described. Heating element 7
When a high temperature is set by the temperature setting unit 1 of the hand controller mounted on the electric carpet by inserting a plug of a power cord (not shown) extending from the hand controller to the outlet (both not shown) ,

The set temperature correction unit 4 inputs the detected temperatures of the indoor temperature detection unit 2 and the carpet temperature detection unit 3, respectively, and determines the corresponding corrected temperature from the two values. For example, the indoor temperature detected by the indoor temperature detection unit 2 is 16.5.
C, the carpet temperature Tc detected by the carpet temperature detection unit 3 is 22 ° C., the correction temperature of 2 ° C. is determined, and the correction temperature 2 ° C. is set to the temperature of 70 ° C. corresponding to the setting of the temperature setting unit 1. The corrected set temperature of 72 ° C. is obtained by adding.

Further, for example, when the room temperature detected by the room temperature detection unit 2 is 20 ° C. and the carpet temperature Tc detected by the carpet temperature detection unit 3 is 24 ° C., the set temperature correction unit 4 determines from the two values. The correction temperature of -3 ° C is determined, and the correction temperature -3 ° C is subtracted from the setting temperature 70 ° C to obtain the correction setting temperature 67 ° C.

The output control section 5 controls the heating element driving section 6 based on the corrected set temperature obtained by the set temperature correcting section 4 to supply electric power to the heating element 7. At this time, the output control unit 5 controls the kotatsu temperature Tr via the kotatsu temperature detection unit 8.
When the kotatsu temperature Tr reaches the corrected set temperature 72 ° C. due to the heat generated by the heating element 7, the temperature T
The heating element drive unit 6 is controlled so that r is kept constant.

Although the carpet temperature Tc is detected by the carpet temperature detector 3 provided on the back surface of the hand controller in the above embodiment, the carpet temperature Tc is set near the heating element 7. It may be detected by the provided kotatsu temperature detector 8. Further, the correction temperature may be calculated from the capacity of the heating element 7 corresponding to the room temperature and the set temperature.

Next, the second invention will be described. FIG. 4 is a block diagram showing an embodiment thereof, FIG. 5 is a temperature characteristic diagram of the embodiment, FIG. 6 is an output waveform diagram, and FIG. 7 is a relationship between a carpet temperature Tc and an output PH obtained based on an experiment. Correlation diagram, FIG. 8 is a correlation diagram showing the relationship between the kotatsu temperature Tr and the output reduction width Pd obtained based on the experiment, and FIG. 9 is the relationship between the kotatsu temperature Tr and the output reduction time Td obtained based on the experiment. 10 is a waveform diagram showing an example of the stimulus output, FIG. 11 is a correlation diagram showing the relationship between the kotatsu temperature Tr obtained based on the experiment and the OFF time of the stimulus output, and FIG. 12 is an output waveform. 13 is a waveform diagram showing the relationship with the stimulus output waveform, FIG.
15 is a flowchart for explaining the operation.

In FIG. 4, in addition to the keys described in the first invention, for example, a combined key 1
1, a normal mode key 12 and a warm feeling mode key 13 are provided. The combination key 11 is used when used together with the electric carpet, and the normal mode key 12 is used for the upper limit temperature T described later.
This is for periodically raising and lowering the kotatsu temperature Tr within the range between H and the lower limit temperature TL.
In the same manner as described above, the kotatsu temperature Tr is raised and lowered within the temperature range, and when the kotatsu temperature Tr is lowered, the temperature Tr is instantly raised to the upper limit temperature TH over a plurality of times.

Reference numeral 14 denotes an output control unit, which is a carpet temperature Tc.
Data for obtaining the output PH from (shown in FIG. 7),
Data for determining the output reduction width Pd (shown in FIG. 8) and the output reduction time Td (shown in FIG. 9) from the kotatsu temperature Tr are set respectively. This output control unit 14
First, it is determined whether or not the combined key 11 is set, and then it is determined which of the normal mode key 12 and the warm sensation mode key 13 is set. When the combination key 11 is set, a command is issued to the upper limit / lower limit temperature setting unit 15 described later to input the set temperature, the room temperature and the carpet temperature Tc, respectively, and the combination key 11 is not set. If so, issue a command to input only the set temperature.

When the normal mode is confirmed by the normal mode key 12 after the combination key 11 is judged, the kotatsu temperature T
Until the temperature r reaches the upper limit temperature TH (the temperature set by the upper / lower limit temperature setting unit 15), the heating element drive unit 6 is operated at the output PH.
(This is referred to as rising mode) to control the kotatsu temperature T.
When r reaches the upper limit temperature TH, the output reduction width Pd and the output reduction time Td are obtained from the kot temperature Tr, and the output is sequentially reduced (this is called a descending mode). By this control, when the kotatsu temperature Tr reaches the lower limit temperature TL (the temperature set by the upper limit / lower limit temperature setting unit 15), the heating element drive unit 6 is controlled so that the kotatsu temperature Tr reaches the upper limit temperature TH again. To do.

This output PH is obtained from the carpet temperature Tc as shown in FIG. 7 when the combination key 11 is set, and is obtained from the set temperature (not shown) when the combination key 11 is not set. ing. Output lowering time T
The timer TM1 is used to count d, and the timer TM1
When the count time of 1 reaches the output reduction time Td, the next output reduction width Pd and the output reduction time Td are obtained.

When the warm-sensing mode is confirmed by the warm-sensing mode key 13 after the combination key 11 is judged, the ascending mode is controlled in the same manner as the above-mentioned normal mode, and at the end, the stimulus output setting section 16 to be described later. To set the ON time Ton and OFF time Tof of the stimulus output,
The descending mode control described above is performed. By setting this mode, the kotatsu temperature Tr changes from the upper limit temperature TH to the lower limit temperature TL.
The stimulus output is output a plurality of times until it falls to.

Reference numeral 15 denotes an upper / lower limit temperature setting section, which is a correction temperature obtained based on the room temperature and the carpet temperature Tc as shown in FIG. 3, and a set temperature (high temperature: 70) corresponding to the setting of the temperature setting section 1. C., medium temperature: 55.degree. C., low temperature: 40.degree. C.) and a temperature t for calculating the lower limit temperature TL, for example, 3.degree. When the instruction to set the combined key 11 is received, the set temperature corresponding to the setting of the temperature setting unit 1 is set, and the room temperature and the carpet temperature Tc are respectively input.

For example, when the room temperature is 17 ° C. and the carpet temperature Tc is 27 ° C., a correction temperature of −2 ° C. is set, and when the set temperature is 70 ° C., the temperature is 70 ° C. to −2.
The upper limit temperature TH is 68 ° C. obtained by subtracting the temperature C, and the lower limit temperature TL is 65 ° C. obtained by subtracting 3 ° C. of the temperature t from the upper limit temperature TH of 68 ° C.

When the combination key 11 is not set, the set temperature corresponding to the setting of the temperature setting unit 1 is set as the upper limit temperature TH, and the temperature obtained by subtracting 3 ° C. of the temperature t from the upper limit temperature TH is obtained. The lower limit temperature TL is set. This upper limit temperature TH
The lower limit temperature TL is a range in which the kotatsu temperature Tr periodically rises and falls.

The stimulus output setting unit 16 sets the ON time Ton and the OFF time Tof of the stimulus output as shown in FIG. 10, and is output by the output control unit 14 when the output is decreased. Stimulation output ON time Ton, for example, 2 seconds, and stimulation output OFF time To obtained from the kotatsu temperature Tr
f (shown in FIG. 11) is set. The upper limit output value of this stimulation output is the same as the output PH obtained based on the carpet temperature Tc (shown in FIG. 7) and the output PH obtained based on the set temperature. The timer TM21 counts the ON time Ton and the OFF time Tof of the stimulus output.

The output control unit 14, the upper / lower limit temperature setting unit 15 and the stimulus output setting unit 16 described above are assumed to be composed of, for example, a microcomputer. The output PH data set in the output control unit 14, the output reduction width Pd and the output reduction time Td data, the correction temperature, the set temperature and the lower limit temperature TL set in the upper / lower limit temperature setting unit 15 are calculated. Temperature t for stimulation output setting unit 1
The ON time Ton of the stimulus output and the OFF time Tof of the stimulus output which are set to 6 are respectively stored in the memory (not shown), and the determination and processing of the output control unit 14, the heating element drive unit 6, and the stimulus output setting unit 16 are performed. And upper / lower limit temperature setting unit 1
5, the CPU controls the upper limit / lower limit temperature setting unit 15 and the stimulus output setting unit 16 and the arithmetic processing thereof.
(Not shown).

Next, the operation of the electric kotatsu when used together with the electric carpet during heating will be described with reference to the flowcharts of FIGS. 13 to 15. The operation in the normal mode will be described first, and then the operation in the warm feeling mode will be described.

When the combination key 11 and the normal mode key 12 are set, and the temperature setting unit 1 sets, for example, a high temperature (S
1), the output control unit 14 issues a command to the upper limit / lower limit temperature setting unit 15 that the combination key 11 is set, so that the upper limit / lower limit temperature setting unit 15 determines the indoor temperature from the indoor temperature detecting unit 2 (S2). , The carpet temperature Tc is input from the carpet temperature detection unit 3 to determine the correction temperature and (S
3, S4), the high set temperature is corrected based on the corrected temperature to calculate the upper limit temperature TH (S5), and the temperature t is subtracted from the upper limit temperature TH to calculate the lower limit temperature TL (S).
6).

When the upper limit / lower limit temperature setting unit 15 determines the upper limit temperature TH and the lower limit temperature TL, the output control unit 14
Sets the rising mode and determines whether the control mode is normal or warm (S7, S8). In the warm feeling mode, the process proceeds to step 26. In this case, since it is the normal mode, the process proceeds to step 9 to determine whether the mode is the ascending mode or the descending mode. At the initial stage, since the rising mode is set in step 7, the process proceeds to step 10 and the carpet temperature Tc is reached.
Is detected to obtain the output PH (shown in FIG. 7), and the output PH is set as the output P (S11, S12).
Then, the set output P is output to the heating element drive unit 6 to cause the heating element 7 to generate heat.

At this time, the output control unit 14 detects the kotatsu temperature Tr due to the heat generation of the heating element 7 via the kotatsu temperature detection unit 8 (S13), and determines whether or not the upper limit temperature TH has been reached (S14). .. When the kotatsu temperature Tr has not reached the upper limit temperature TH, the temperature is continuously detected, but when the kotatsu temperature Tr becomes the same, the descending mode is set in step 15 and the process returns to step 9 to detect the kotatsu temperature Tr (S16). ).

Then, the output controller 14 controls the temperature Tr
From the output P (the output P and the output PH have the same level at the initial stage), the output reduction width Pd is calculated (shown in FIG. 8) and the output reduction time Td of the output P is obtained (FIG. 9). , And the timer TM1 is reset (S17 to S19). After that, from output P to output reduction width P
The value obtained by subtracting d is set as the output P (S2
0), the output P is output to the heating element drive unit 6. At this time, the timer TM1 is activated to start counting time (S21). The heating element drive unit 6 outputs its output P (P-P
Since the heating element 7 is caused to generate heat based on d), the kotatsu temperature Tr starts decreasing from the upper limit temperature TH.

On the other hand, the output control section 14 detects the falling kotatsu temperature Tr through the kotatsu temperature detection section 8 and determines whether or not the lower limit temperature TL has been reached (S22, S2).
3). If the kotatsu temperature Tr has reached the lower limit temperature TL, the process proceeds to step 25. If not, it is determined whether the count time of the timer TM1 is the same as the output reduction time Td (S24). Step 2 if they are not the same
Return to 1 and repeat the operation. By repeating this operation, when the count time of the timer TM1 reaches the lowering time Td, the process returns to step 16 to calculate the next output lowering width Pd and the output lowering time Td (S17, S18), and the same as above. Take action. When the kotatsu temperature Tr reaches the lower limit temperature TL while repeating this operation, step 2
5, the rising mode is set, and the kotatsu temperature T is set again.
It operates so that r reaches the upper limit temperature TH (S10 to S
15).

By this series of operations, the output P output to the heating element 7 has a waveform as shown in FIG. 6, so that the kotatsu temperature Tr is the upper limit temperature TH and the lower limit temperature TL as shown in FIG.
It goes up and down periodically within the range of.

Next, the operation when the warm feeling mode key 13 is set will be described. Calculation of upper limit temperature TH, lower limit temperature T
Setting of L and operation of the ascending mode by the warm feeling mode (S2
7 to S32) are the same as those in the normal mode, and the description thereof will be omitted.

When the operation in the ascending mode is completed, the output control unit 14 determines the descending mode in step S26, and the stimulus output setting unit 16 sets the stimulus output ON time and OFF.
Output the command to set the time. Receiving the command, the stimulus output setting unit 16 resets the timer TM2, sets the preset stimulus output ON time Ton (for example, 2 seconds), and is input via the output control unit 14. The OFF time Tof of the stimulus output is calculated from the kotatsu temperature Tr of the kotatsu temperature detection unit 8 (shown in FIG. 11), and O
The FF mode is set (S33a to S33e).

Turning on the stimulus output by the stimulus output setting unit 16
When the time Ton and the OFF time Tof are set, the output control unit 14 calculates the output reduction width Pd of the output P from the kotatsu temperature Tr (shown in FIG. 8) and outputs the output P as in the normal mode. The lowering time Td is obtained (shown in FIG. 9) and the timer TM1 is reset (S34 to S).
37). After that, a value obtained by subtracting the output reduction width Pd from the output P is set as the output P (S38), and the output P is output to the heating element drive unit 6. At this time, timer TM
1 is activated to start counting time (S39).
Since the heating element drive unit 6 causes the heating element 7 to generate heat based on the output P (P-Pd), the kotatsu temperature Tr is the upper limit temperature T.
Start descending from H.

At this time, the output control section 14 detects the falling kotatsu temperature Tr through the kotatsu temperature detecting section 8 and determines whether or not the lower limit temperature TL has been reached (S40, S4).
1). When the kotatsu temperature Tr reaches the lower limit temperature TL, the rising mode is set (S44), but otherwise, the stimulation output setting unit 16 is instructed to start counting the OFF time Tof of the stimulation output (S42).

The stimulus output setting unit 16 that has received the command
First, it is determined whether the mode is ON or OFF (S42a).
In this case, since the OFF mode is set in step 33e, the process proceeds to step 42b and the output P at the present time is set.
Is set as P, the timer TM2 is activated to start counting time (S42c), and it is determined whether the count time has reached the time Tof (S42d). When the count time reaches the time Tof, the ON mode is set (S42e), but since it does not reach the time at the beginning, the time count is continued.

At this time, the output controller 14 uses the timer TM.
It is sequentially determined whether the count time by 1 has reached the lowering time Td and whether the kotatsu temperature Tr has become equal to the lower limit temperature TL (S41, S43). When the kotatsu temperature Tr does not become the same as the lower limit temperature TL and the count time by the timer TM2 on the stimulus output setting unit 16 side has not reached the time Tof, or when the count time of the timer TM1 reaches the decrease time Td. , Step 3
Returning to 4, the output reduction width Pd of the output P and the output reduction time Td
Is calculated, a new output P is set, and the same operation is repeated (S34 to S43).

The stimulus output setting unit 16 updates P each time the output P is set (S42b), and continues counting time (S42c). When the count time of the timer TM2 becomes equal to the time Tof (S42d), the ON mode is set and the count time of the timer TM2 is reset (S42e, S42f). At this time, if the kotatsu temperature Tr is not equal to the lower limit temperature TL in step 41, the output PH set in step 42a is set.
Is set as P (S42g), the timer TM2 is activated again to start counting time (S42h).

Then, that time is the ON time T of the stimulus output.
When it is the same as on (S42i), the OFF mode is set again and the count time of the timer TM2 is reset (S42j, S42k). After that, the kotatsu temperature Tr is detected to newly calculate the OFF time Tof of the stimulation output (see FIG.
Shown in 1. ) (S42m, S42n).

On the other hand, the output control unit 14 executes step 42g.
At the same time that P is set in, the output P output in the rising mode is output to the heating element drive unit 6 to cause the heating element 7 to rapidly generate heat, and the count time of the timer TM2 becomes the same as the ON time Ton of the stimulation output. When it becomes, the output P is rapidly lowered to the output P obtained in step 38. By repeating this series of operations, the output P has a waveform as shown in FIG. When the kotatsu temperature Tr reaches the lower limit temperature TL in step 41, the rising mode is set (S44), and the process proceeds to step 26.
Perform climb mode operation again.

In the above embodiment, the output PH corresponding to the upper limit temperature TH is obtained from the carpet temperature Tc or the set temperature, but the output PH may be obtained from the room temperature. In this case, it is possible to obtain the output PH corresponding to the room temperature in advance and set it in the output control unit 4.

Although the stimulus output is output at predetermined time intervals based on the data shown in FIGS. 8 and 9, the same effect can be obtained even if the stimulus output is randomly output by a random number generating means or the like.

[0054]

As described above, according to the first aspect of the invention, since the set temperature is corrected based on the ambient temperature, the electric carpet is not overheated by heating and the temperature adjustment is troublesome. The effect that there is no is obtained. According to the second aspect of the invention, the kotatsu temperature is controlled so as to be periodically raised and lowered between the set upper limit temperature and the lower limit temperature, so that the power consumption is reduced as compared with the conventional case, and the kotatsu temperature is lower than the upper limit temperature. The temperature of the kotatsu is controlled to increase instantly until the lower limit temperature is reached, and the temperature is changed so that comfortable warmth can be obtained even when used for a long time. Has been.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a first invention.

FIG. 2 is a temperature characteristic diagram of the embodiment.

FIG. 3 is correction temperature data obtained based on an indoor temperature and an electric carpet temperature Tc.

FIG. 4 is a block diagram showing an embodiment of the second invention.

FIG. 5 is a temperature characteristic diagram of the embodiment.

FIG. 6 is an output waveform diagram.

FIG. 7 is a correlation diagram showing a relationship between a carpet temperature Tc and an output PH obtained based on an experiment.

FIG. 8 is a correlation diagram showing a relationship between a kotatsu temperature Tr and an output reduction width Pd obtained based on an experiment.

FIG. 9 is a correlation diagram showing the relationship between the kotatsu temperature Tr and the output reduction time Td obtained based on experiments.

FIG. 10 is a waveform diagram showing an example of stimulus output.

FIG. 11 is a correlation diagram showing a relationship between the kotatsu temperature Tr obtained based on the experiment and the OFF time of the stimulation output.

FIG. 12 is a waveform diagram showing a relationship between an output waveform and a stimulus output waveform.

FIG. 13 is a flowchart for explaining the operation.

FIG. 14 is a flowchart showing a continuation of FIG.

FIG. 15 is a flowchart showing a continuation of FIG.

FIG. 16 is a temperature characteristic diagram of a conventional electric kotatsu.

[Explanation of symbols]

 1 Temperature Setting Section 2 Indoor Temperature Detection Section 3 Carpet Temperature Detection Section 4 Set Temperature Correction Section 5 Output Control Section 11 Combined Key 12 Normal Mode Key 13 Warm Mode Key 14 Output Control Section 15 Upper / Lower Temperature Setting Section 16 Stimulus Output Setting Department

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[Procedure amendment]

[Submission date] February 17, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the first invention, FIG. 2 is a temperature characteristic diagram of the embodiment, and FIG. 3 is a correction temperature obtained based on an indoor temperature and an electric carpet temperature Tc. It is a figure which shows the data of.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is a diagram showing data of a corrected temperature obtained based on an indoor temperature and an electric carpet temperature Tc.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Osawa 1728, Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Appliances Co., Ltd. (72) Kazuhiro Fukuda 1728, Omaeda, Hanazono-cho, Saitama-gun Within Mitsubishi Electric Home Equipment Co., Ltd.

Claims (5)

[Claims] 1. A temperature setting unit for setting a temperature of a heater, a temperature detecting unit for detecting an ambient temperature, a correction temperature set in advance, and the temperature when the set temperature is set by the temperature setting unit. A correction temperature is determined based on the ambient temperature detected by the detection unit, and a set temperature correction unit that adds or subtracts the correction temperature to and from the set temperature and a correction set temperature obtained by the set temperature correction unit An electric heater comprising: an output control unit that controls heat generation of a heating element. 2. The temperature detecting section includes an indoor temperature detecting section for detecting an indoor temperature and a carpet temperature detecting section for detecting a temperature of an electric carpet during heating, and the temperature setting section sets the set temperature. When the temperature is set, the set temperature correction unit determines the correction temperature based on the room temperature and the carpet temperature, and adds or subtracts the correction temperature to the set temperature. heater. 3. A temperature setting unit for setting the temperature of the heater, a first temperature detecting unit for detecting the ambient temperature, a second temperature detecting unit for detecting the temperature of the heater, and a correction temperature in advance. When the temperature is set and set by the temperature setting unit, the correction temperature is determined based on the ambient temperature detected by the first temperature detection unit, and the set temperature is corrected based on the correction temperature. The upper limit temperature of the heater and a lower limit temperature of the heater, which is a value obtained by subtracting a preset temperature from the upper limit temperature. The heating element is caused to generate heat with a predetermined electric power until the heater temperature detected by the section reaches the upper limit temperature, and when the heater temperature reaches the upper limit temperature, the electric power is sequentially decreased to the lower limit temperature at predetermined time intervals. Lower the heat of the heating element to Electric heater, wherein the vessel temperature is provided with an output control unit which is adapted to repeat the above heating operation again upon reaching the lower limit temperature. 4. A stimulus output setting unit for setting a stimulus output for increasing the heater temperature at predetermined time intervals is provided, and when the stimulus output is set, the output control unit causes the heater temperature to reach an upper limit temperature. From the above to the lower limit temperature, the electric power is sequentially decreased at predetermined time intervals to lower the heat generation of the heating element, while the heating element is caused to generate heat by the power based on the stimulus output over a plurality of times. The electric heater according to claim 3. 5. The first temperature detecting section comprises an indoor temperature detecting section for detecting an indoor temperature and a carpet temperature detecting section for detecting a temperature of an electric carpet during heating, and is set by the temperature setting section. When the temperature is set, the upper / lower limit temperature setting unit determines the correction temperature based on the room temperature and the carpet temperature, and corrects the set temperature based on the correction temperature to determine the upper limit temperature of the heater. The electric heater according to claim 3 or 4, wherein a value obtained by subtracting a preset temperature from the upper limit temperature is set as the lower limit temperature of the heater.