JPH0754736B2 - Temperature control device for sheet heating element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is not affected by the presence or absence of a cover attached, and also addresses the problem of the difference in heat insulation of the attached cover and the individual difference in the sense of temperature. The present invention relates to a temperature control device for a sheet heating element capable of providing comfortable heating.

(Prior Art) In a planar heating element such as an electric carpet, there has been proposed a sheet heating element that eliminates the effect of a user's feeling of a temperature difference due to high and low ambient temperatures and enables comfortable temperature control. Its contents are known from Japanese Patent Publication No. 57-61281.

This is a configuration in which the set temperature is corrected to a low level according to the level of the room temperature, and the energization to the heating element is controlled so that the temperature of the heating element matches the corrected set temperature.

(Problems to be solved by the invention) Recently, without directly using the electric carpet,
Covers have often been attached to prevent dirt and damage on the surface side, but covers that are now in widespread use are made of polyurethane foam, etc. as a base material, unlike sheets such as cotton cloth. Needless to say, the seat temperature felt by a person sitting on the carpet is naturally different between when the cover is attached and when the cover is not attached.

Therefore, even if the above-mentioned known device capable of adjusting the set temperature in response to the change in the room temperature is used, it is impossible to deal with the presence or absence of the cover, and it is necessary to further correct the set temperature. The fact is that no sheet heating element that can meet the demand has been provided yet.

By the way, at first glance, it seems that the set temperature should be set slightly higher when the cover is attached,
The temperature sensor that detects the temperature of the heating element is provided deep in the carpet layer, and the set temperature is the entire temperature of the carpet, compared to the sitting temperature (the temperature actually felt by the human body) at the limited place where the user is seated. Whether the cover is used or not, because it specifies the average temperature of the heat generating part under the temperature distribution condition in the area, so that it is not possible to obtain good results simply by performing a constant value temperature correction. It is difficult to realize a device that enables comfortable control by eliminating the seat temperature difference due to the fact that the demand has not been met until now.

The present applicant has previously proposed Japanese Patent Application No. 61-120796 as a solution to such a conventional problem. However, the present invention proposes a switching means such as a changeover switch according to whether the cover is attached or not. By automatically correcting the set temperature under the conditions suitable for each condition by the operation of, the influence of the room temperature difference and the seat temperature difference due to the presence or absence of the cover is eliminated, and the maintenance of comfortable heating is always stable. It aims to be achieved.

However, in reality, there are many types of covers with different heat insulation performance, and it is necessary to adjust the surface temperature under the conditions adapted to each, and there are individual differences in the thermal sensation. Considering that it is necessary to consider the regional difference from Kyushu, it is necessary to enable more versatile temperature control, and the present invention provides a user's temperature difference, regional difference, and cover. The purpose is to maintain more stable and comfortable heating so that various problems such as the type of room can be overcome.

(Means for Solving Problems) However, according to the present invention, as is clear from FIG. 1 which clearly shows the configuration, a sheet-like heating element (1) detachably provided with a cover (6) attached to the surface thereof. as the temperature control device, the heating temperature detecting means (7), and room temperature detecting means (8), a plurality of temperature setting means (9 ₁₎ ... (9 _4), and switching means (11),
It comprises a set temperature correction means (10), a temperature determination means (12), and a control means (13).

The heat generation temperature detection means (7) detects the temperature of the heating element (2) of the planar heating element (1) and emits an electric signal corresponding to the temperature.

The room temperature detecting means (8) detects the temperature in the room where the sheet heating element (1) is installed and generates an electric signal corresponding to the temperature.

Each temperature setting means (9 ₁₎ ... (9 ₄₎ generates an electrical signal for setting the temperature of the heating element (2) as an electrical signal of a linear function relationship with a negative coefficient depending on the height of the room The electric signal is generated as a state in which the level and the degree of change are different from each other.

First switching means (11), the cover (6) each temperature setting means when not wearing the _(9-1) ... in the _(9-4), the first level and degree of change in the electrical signal is a minimum the temperature setting means (9 _1), whereas, the first temperature setting means (9 ₁₎ is respectively selected operating one except with climate degree detecting means (8) according to the type of cover when mounted Connect it.

Setting temperature correction means (10) includes a first temperature setting means (9 ₁₎
Except for the first switching means (11) is a temperature setting means selected _(9-2) ... the set temperature - minus coefficient climate characteristics are those to perform only the temperature correction to slightly value increased or decreased constant unchanged, This is done by operating the second switching means (25).

The temperature determination means (12) is selected by the first switching means (11),
And, with respect to temperature in as required set temperature correction means (10) corrected temperature setting means comprising (9- ₁₎ ... generating electrical signals, the direction of the generating electrical signals of the heating temperature detection means (7) An off signal is generated when it is large, and an on signal is generated when it is small.

The control means (13) operates so that the heating element (2) is energized by the ON signal generated by the temperature determination means (12) and is deenergized by the OFF signal. A transistor is suitable.

(Operation) The present invention is a first temperature setting means only simple manual operation only is automatically actuate the first switching means (11), or switched manually (9- ₁₎ and the other temperature setting means (9 - ₂₎ ... in response to different heat insulation performance of the cover (according to different with or without 6), further second temperature setting means _(9-2) after the cover each unit is mounted (6), proper temperature It is possible to make a correction to maintain the sitting temperature in a comfortable state.

In addition, by operating the set temperature correction means (10), it is possible to maintain proper temperature characteristics for users having different sensations to temperature, or for different regions.

(Examples) Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows a planar heating element (1), for example, an electric carpet, in which a heating element (2) is formed by arranging conductive films in a plane, and a linear thermosensitive element is provided below the heating element (2). The temperature sensor (3) formed in close proximity to the backside material (4) and the front surface material (5) is sandwiched between the temperature sensor (3) and the temperature sensor (3) to form an integrally formed thick sheet. The sheet heating element (1) is provided with a cover (6), which is placed on the surface material (5) in an overlapping manner, as a detachable accessory. An electric circuit for controlling the temperature of the sheet heating element (1) having the above structure is shown in FIG.
It is provided with a high-voltage control circuit for connecting to and a low-voltage control circuit for automatically adjusting the power supply to the heating element (2).

The high-voltage control circuit includes a relay (1
4) A changeover switch (15) for switching and using the heating element (2) on the entire surface or a half surface, a power switch (16), a protective temperature fuse (17), and an indicator lamp (18).

On the other hand, the light-electricity control circuit has the temperature sensor (3) as a detection unit, and generates heat signals in response to the average temperature of the heat generating element (2). A room temperature detecting means (8) for generating an electric signal corresponding to room temperature and a second switching means (having a protective electrode (18) provided for detecting electric leakage and a temperature sensor (19) for detecting room temperature as detecting parts. 25) and a switch (11) as the first switching means as an input element, and a microcomputer (hereinafter referred to as a microcomputer) (24) for calculating signals from these input elements, each of the input elements. It is equipped with a control circuit body composed of a scanner (22) and an A / D converter (23) for processing analog signals generated from the monitor lamps (28A ~ C) and the relay ( 14) Solenoid (14s)
The relay (14) is connected to control ON / OFF of the relay (14) and display of each operating state.

Thus the microcomputer (24) of the components of the present invention, a plurality of temperature setting means (9 ₁₎ ... (9 _4), the set temperature correction means (10), temperature determining means (12) and control means (1
The control center corresponding to 3), which consists of an input port, an output port, a read-only memory (ROM), an arbitrary access memory (RAM) and a central processing unit (CPU), and is written in the ROM and RAM. The flow chart of the written program is shown in FIG. 4, and the flow chart of the written data is the line (I) to (IV) in FIG.
Is represented as.

Next will be described the operation of the present invention apparatus embodiment by Figure 3 and Figure 4, the power switch (16) is turned on and operated appropriately change-over switch (15), the temperature setting means (9 ₁₎ ... and the setting When the temperature of the heating element (2) is lower than the set temperature set by the temperature correction means (10), the microcomputer (24) issues an output for excitation to the solenoid (14s) of the relay (14), and the relay Since the (14) is closed, the heating element (2) is energized and the temperature gradually rises.

The microcomputer (24) reads the temperature (T _M ) and room temperature (T _R ) of the heating element (2) detected by the detection means (7) and (8) periodically for a predetermined time (a), and 1 switching means (11) as the switch (11) check whether being operated in either the (b), for example the cover (6) is in the state of the switching not be mounted, at room temperature (T _R) is It is determined whether it is higher or lower than a preset upper limit value ( _TR1 , for example, 25 ° C) (C).

If the result of this determination is T _R ≧ T _R1 , the room temperature (T _R ) is set to T _R1 (25
(T), and if T _R <T _R1 , then make a comparison judgment with a preset lower limit (T _R2 , eg 15.8 ° C) (E).

If the judgment result at this time is T _R > T _R2 , the room temperature (T _R ) is used as the actual value for the next calculation, while T _R ≤T _R2
Then, room temperature (T _R ) is fixed at T _R2 (15.8 ° C) (f).

It should be noted that in this judgment, if the selected temperature of the heating element (2) is lowered when the room temperature is high, heating is not effective, while if the room temperature is low, the temperature of the heating element (2) is extremely increased. Since there is a danger of overheating, the upper and lower limits are set in consideration of this point.

Thus, when the room temperature (T _R) is a _{T R2 <T R <T R1} , to perform with the correction of the set temperature corresponding to the first temperature setting means (9 ₁₎ is calculated by CPU (g).

That is, the calculation formula of the _OFF control temperature point (T _OFF ) corresponding to the line (I) in FIG. 7, T _OFF = −f · T _R + A (A), where f = 1.2 A = 63 Then, the reference set temperature is determined according to the linear function having a negative coefficient depending on the room temperature.

In this case, as described above, the lower limit value of T _R (T _R2 = 15.8
℃) and the upper limit (T _R1 = 25 ℃) have been determined.
The upper and lower limits of _OFF are 44 ° C and 33 ° C, respectively. Within this temperature range, the temperature (T _H ) of the heating element (2) is set low when room temperature is high, and conversely it is set high when it is low. is there.

When T _OFF is determined as described above, ON control temperature point (T _ON )
Is calculated by T _ON = T _OFF −C (B) where C = 2.5 ° C. (differential) ( _H ), and after reading the detected temperature (T _H ) of the heating element (2) (R) , Temperature determination corresponding to the temperature determination means (12) is performed (No).

If the result of this temperature judgment (nu) is T _H <T _ON , an ON signal is issued, and if T _H > T _OFF , an OFF signal is issued.

By turning on / off the transistor, which is connected in series to the solenoid (14s) of the relay (14), for example, by turning on / off the electric current to the heating element (2), the on / off control is performed. it is possible to hold the body (2) to the set temperature determined by the first temperature setting means (9 _1).

On the other hand, depending on whether the cover (6) is attached and the cover (6) has large, medium, or small heat insulating property among the three types, for example, the heat insulating property is small.
A switching connection state (a) to the switching means (11) is a second temperature setting means _(9-2) and (f), first, and climate (T _R) is an upper limit value in this case (T _R1) e.g. Determine whether it is higher or lower than 25 ° C (C) ′.

If the result of this determination is T _R ≧ T _R1 , the room temperature (T _R ) is set to T _R1 (25
(D) ', and if T _R <T _R1 , then a comparison is made with a preset lower limit (T _R3 ) such as 17.3 ° C. (L)'.

If the judgment result at this time is T _R > T _R3 , the room temperature (T _R ) is used as the actual value for the next calculation, while T _R ≤T _R
If it is _R3 , room temperature (T _R ) is fixed at T _R3 (17.3 ℃) (wo) '.

Thus, at room temperature when the (T _R) is a _{T R3 <T R <T R1} , the correction of the set temperature corresponding to the second temperature setting means _(9-2) is calculated by CPU (Wa) '.

That is, the calculation formula of the _OFF control temperature point (T _OFF ) corresponding to the line (II) in FIG. 7, T _OFF = −g _a · T _R + B _a (B) where g _a = 2.2 B _a = 89 And

The first temperature setting means (9
-Set the reference set temperature based on the linear function of the negative coefficient under the condition that the level is higher (B _a > A) and the degree of grading is higher (g _a > f) than in the case of ₁ ).

Also in this case, since the lower limit of _{T R (T R3 = 17.3 ℃} ) and the upper limit value (T _R1 = 25 ℃) is determined, the upper limit value and the lower limit value of T _OFF are each 51 ° C. and 34 ° C. In this temperature range, the temperature (T _H ) of the heating element (2) is low when the room temperature is high,
Conversely, if it is low, it will be automatically set to a high value.

After that, the ON control temperature point (T _ON ) is calculated ( _H ), the detected temperature (T _H ) of the heating element (2) is read (R), and the temperature judgment ( _N ) is performed with the cover (6) attached. It is similar to that when there is no.

As described above, the reference temperature of the heating element (2) is set higher when the cover (6) is attached as shown in FIG. Moreover, this temperature difference between set temperatures (ΔT) is smaller when the room temperature is higher, and becomes 1 ° C (minimum) at 25 ° C.
On the other hand, when the room temperature is as low as 8.7 ° C (maximum) at 17.3 ° C, it becomes larger, and when the sitting temperature, which is the sensible temperature when actually sitting on the carpet, was measured, as shown in Fig. 7. The temperature values are almost the same regardless of the presence or absence of the cover (6), and good results are obtained in which all the conditions are included in the comfortable temperature range (L), and thus comfort control is realized. It was

If the heat insulation of the attached cover (6) belongs to the middle or large area, the first switching means (11) is set to the third position.
While connected to the temperature setting means _(9-3) (in FIG. 4 (b)
Flow) or determination of the fourth (a state of being connected to the _9-4) (of FIG. 4 (c) temperature setting means flows), to perform operations.

In this case, the lines that are the basis of the calculation formula are respectively shown in FIG.
As shown by III and IV, the absolute value of the coefficient is g _c > g _b
> G _a > f and the constants are B _c > B _b > B _a > A.

In the example described above, the first changeover means (11) is applied to a manual changeover switch.
It is also possible to use an automatic device for automatically operating the switching means (11). In this example, as shown in FIG. 5, the cover (6) is provided at two positions apart from each other on the front side of the electric carpet (1). ) cover sensor for detecting whether or not the mounted (26- _1), and attached people husband (26- _2), both sensors (26
- _{1), (26-2)} of the detection signal of the cover detection circuit (27- _1),
(27- ₂₎ were circuitry configured to send to each via the scanning device (22), the cover sensor (26- _1), a signal actuated by the mounting of the (26- ₂₎ together cover (6) when emitted, the switching means (11) takes the ethical product of both signals actuates the cover mounting side, also, two sensors (26 - _1), if no operation is at least one of (26- ₂₎ First switching means (1
1) should be operated on the side without the cover (see Fig. 6).

On the other hand, when it is desired to correct the temperature due to the regional difference of cold zone or warm zone or the difference in the feeling of the user, the second switching means (25) is operated to operate the first switching means (11). There to selected temperature selecting means (9 ₂₎ ..., so that to perform the associated connection allowed temperature compensation setting temperature correction means (10).

If this setting temperature correction means (10) is equipped with a cover (6), that the second temperature setting means _(9-2) to fourth temperature setting means (9 ₄₎ of the first switching means means (11) When the second switching means (25) is operated when selected, the stepwise temperature correction by the changeover switch or the continuous temperature correction by the variable resistor is performed. , the set temperature the first switching means means (11) is determined by the temperature setting means selected _(9-2) ... - Shiku chain line Shimesuru one point room temperature characteristic in FIG. 7, the negative coefficient only slightly constants immutable Increase / decrease the value, for example, + 2 ° C with higher correction
Is set as the limit, and the temperature correction can be performed by the lower correction of -2 ° C.

For example, the operation of the set temperature correction means (10) is performed as follows.

That is, it is preferable that a salesperson, a maintenance person, etc., make adjustments inside the control unit, rather than using the adjuster that the user can arbitrarily perform. “B” is a combination of two input terminal voltages, H and L, both are L or H, and “A” is H and “B” is L.
It is also possible to use high resistance correction for high eye correction and vice versa for low eye correction, or + 2 ° C to -2 ° C with a variable resistor.
The temperature may be corrected steplessly around the standard without correction in the range of ° C.

As described above, by making it possible to change the level of the change characteristic of the set temperature with respect to the room temperature depending on the user and the use environment, a comfortable sitting temperature can always be obtained.

(Effects of the Invention) As described above, the present invention changes the set temperature of the heating element (2) with respect to room temperature depending on whether the cover (6) is attached or not. Since the set temperature when wearing (6) is corrected so that the degree of change with respect to room temperature is large and the level is also large, the seat temperature actually felt by the user can be adjusted by wearing the cover (6). It is possible to stably maintain the comfortable temperature regardless of the presence or absence, and the comfortable heating control can be surely and easily realized, and the excellent effect of bringing great convenience to the user is exhibited.

Furthermore, due to the difference in the heat insulation of the cover (6), the relationship between the set temperature and the room temperature can be selected so that a comfortable sitting temperature can be obtained. The proper temperature setting can be performed, and temperature control in pursuit of comfort is realized.

[Brief description of drawings]

FIG. 1 is a block diagram clearly showing the constitution of the present invention, FIG. 2 is a schematic structural diagram of a planar heating element according to one embodiment of the present invention, and FIG.
FIG. 4 is an electric circuit system diagram according to an example of the present invention, FIG. 4 is a flowchart showing a control mode of the present invention, and FIGS. 5 and 6 correspond to an electric circuit partial diagram and switching means according to an embodiment of the present invention. FIG. 7 is a diagram showing the relationship between the sitting temperature of the heating element and the set temperature with respect to the room temperature in the present invention. (1) …… Sheet heating element, (2) …… Heating element, (7) ……
Heating temperature detection means (8) .... room temperature detecting means, (9- ₁₎
- _(9-4) ...... temperature setting means, (10) .... set temperature correction means, (11) ... first switching means, (12) ... temperature determining means (13) ... control unit, ( 25) ...... Second switching means.

Claims (1)

[Claims] 1. A sheet heating element (1) detachably equipped with a cover (6) to be attached to the surface of the sheet heating element for detecting the temperature of the heating element (2) and generating an electric signal corresponding to the temperature. The temperature detecting means (7), the room temperature detecting means (8) for detecting the room temperature and generating an electric signal corresponding to the temperature, and the electric signal corresponding to the set temperature in a state in which the level and the degree of change are different from each other, and , are attached to a plurality of temperature setting means (9 ₁₎ ... (9 ₄₎ for respectively generating an electrical signal which varies a linear function manner with a negative coefficient depending on the level of room temperature, the cover (6) wherein each of the temperature setting means the absence (9- ₁₎ ... (9
- ₄ level and the first temperature setter degree minimum of change (9 _1)), while the first temperature setting means according to the type of the cover when mounted (9- ₁₎ either the exception of except the first switching means allowed to connect to each is selected actuated the room temperature detecting means (8) (11), by operating the second switching means (25), the first temperature setting means (9 ₁₎ temperature setting means for the first switching means (11) selects _(9-2) ... the set temperature - set temperature correction means negative coefficients room temperature properties to perform only the temperature correction to slightly value increased or decreased constant unchanged (10) When the first switching means (11) is selected and if necessary set temperature correction means (10) at a temperature correction to become the temperature setting means (9 ₁₎
When the generated electric signal of the heat generation temperature detecting means (7) is larger than the generated electric signal of ...
When it is small, the temperature determination means (1
2) and a control means (13) for energizing the heating element (2) by the ON signal and cutting off the energization by the OFF signal.
A temperature control device for a sheet heating element, comprising: