JP3322417B2 - Temperature control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device used for heating equipment such as an electric heating panel for heating and an indoor air conditioner / heater.

[0002]

2. Description of the Related Art A temperature control device used for a heating device such as an electric heating panel for heating or an indoor air-conditioning heater uses a room temperature and a set temperature or the like as control conditions to turn on and off a heating load to match the room temperature. Control so that appropriate heating can be obtained. By the way, in general, a temperature control device has a built-in heat generating load and an output section for turning on and off the power supply of a switching device for opening and closing the heat generating load in the apparatus main body. The temperature inside the device body may rise due to the switching device that opens and closes electricity.If the device body has a room temperature detection unit, the temperature inside the device body affects the detection temperature of the room temperature detection unit, and the room temperature is detected. It is difficult to use the detected temperature of the part as it is as the above control condition.

[0003]

In order to solve the above-mentioned problems, the average value of the temperature rise corresponding to the magnitude of the load is subtracted from the detected temperature of the room temperature detecting section to determine the room temperature as a control condition. Has been proposed, but in this method,
There is a problem in using it under control conditions that require a certain degree of accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to reduce the influence of the temperature in the apparatus main body on the temperature detected by a room temperature detecting section provided in the apparatus main body. It is an object of the present invention to provide a temperature control device capable of correcting and using a temperature having a higher accuracy than an actual room temperature as a control condition. A second object of the present invention is to improve the detection sensitivity of the internal temperature detecting unit and the room temperature detecting unit and to turn on / off the load energization of the output unit in accordance with the object of the first aspect of the present invention. It is an object of the present invention to provide a temperature control device that slightly reduces the responsiveness at the time, averages the temperatures detected by the internal temperature detection unit, and enables accurate correction.

An object of the invention of claim 3 is to correct the temperature detected by the room temperature detecting section when the room temperature detecting section provided in the apparatus main body is not used. It is an object of the present invention to provide a temperature control device which is prevented from being applied. According to a fourth aspect of the present invention, in addition to the object of the first aspect of the present invention, when the temperature in the apparatus main body becomes excessive, the load energization is turned off so that overload, poor connection, etc. It is an object of the present invention to provide a temperature control device which can use an internal temperature detecting section as a detecting means for preventing the occurrence of a trouble due to the above.

A fifth object of the present invention is to provide a temperature control device capable of displaying a temperature close to an actual room temperature as a room temperature in accordance with the object of the first or third aspect of the present invention. To offer.

[0007]

In order to achieve the above object, a first aspect of the present invention provides a room temperature detecting unit for detecting a room temperature,
A temperature control device that includes a heating load and an output unit that switches on and off the power supply of a switching device that opens and closes the heating load, and controls the output unit based on a temperature detected by the room temperature detection unit. And an internal temperature detector near the output section in the main unit.
A large amount of material is interposed, and the detection temperature of the room temperature detection unit is corrected by a correction amount determined by the detection temperature of the room temperature detection unit and the detection temperature of the internal temperature detection unit.

[0008]

According to a second aspect of the present invention, in the first aspect of the invention, when the internal temperature detecting section detects that the detected temperature in the apparatus main body is higher than a predetermined temperature, the supply of the load current to the output section is turned off. Things .

[0010]

[Action] by Thus, according to the configuration of the invention of claim 1, the detection temperature of the internal temperature detecting unit to correct the detected temperature of room temperature detecting portion in the correction amount that is determined from the detection temperature of the room temperature detecting portion From
Even if the temperature detected by the room temperature detector is affected by the temperature inside the main unit, the room temperature used as a control condition will be highly accurate, close to the actual room temperature. Can be. Especially equipped with internal temperature detector
Near the output section in the main body via a material with a large heat capacity.
The internal temperature detector to improve the detection sensitivity.
And the response to the on / off of the output section is slightly
The detected temperature can be averaged by dulling,
Correct correction is possible.

[0011]

[0012] According to the further in the second aspect of the present invention, the abnormal condition such as the temperature inside the apparatus main body is excessively increased, it is possible to turn off the power supply to the load from the output unit, excessive this off It is possible to prevent the occurrence of a trouble due to an overload causing a temperature rise, a connection failure, or the like.

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment. In this embodiment, as shown in FIGS. 3A to 3C, the apparatus main body 1 is embedded and disposed in an embedding hole of a wall W or a switch box using a mounting frame 2. On the front, a liquid crystal display 4 and a key switch K ₁ for operation are provided.
... and is disposed display light-emitting diodes LED ₁ ~LED _4, etc., and the front surface of the apparatus main body 1 can visually recognize the display, also provided with a transmission window or the operation unit as the key switch operation becomes possible surface Panel 3 is attached. Further, as shown in FIG. 4, a plate frame 7 mounted around the surface panel 3 is provided.
And a room temperature detecting portion formed of a temperature detecting element such as a thermistor as shown in FIG. 4 on a side portion of the apparatus main body 1 facing a space surrounded by a side edge of the front panel 3 and a frame piece of the mounting frame 2. 5 bulges define a receiving portion 1a for accommodating a, a hole 6 which communicates with the accommodating portion 1a is the outer surface of the housing portion 1a is provided, the space along the wall surface when the attach to the wall surface The air rising through the air flows into the storage section 1a and the room temperature detection section 5
Is to touch.

As shown in FIG. 5, the room temperature detecting section 5 is mounted on the printed circuit board 8 so as to float on the printed circuit board 8 via a lead wire in order to reduce the influence of heat conduction from the printed circuit board 8. The storage section 1a facing the inside of the main body 1.
The opening of the storage section 1a is closed by a heat insulating material 26 so as to avoid the influence of the temperature inside the apparatus main body 1. The printed circuit board 8 is provided with a heat insulating material 2 so as to prevent the printed circuit board 8 from being affected by convective heat in the apparatus body 1 when there is a gap between the printed circuit board 8 and the apparatus body 1.
6 is fixed.

In the apparatus main body 1, two printed boards 9, 10 are housed in addition to the printed board 8, and the printed board 8 has a key switch K ₁ . Device 4, light-emitting diode LED ₁ for display
-Circuit components such as LED ₄ and a control unit are mounted.
, Circuit components of the output section are mounted respectively. The printed circuit board 10 is connected to and separated from the printed circuit board 9 by connecting wires (not shown) and connectors (not shown) so that the output section can be easily replaced.

A terminal for connecting an AC power supply AC, a terminal for connecting a load such as a heating load to be controlled, and a room temperature detecting unit 22 which will be described later provided outside the apparatus are connected to the back of the apparatus main body 1. Connection terminals and telecontrol connection terminals are provided as quick connection terminals. The entire circuit of the present embodiment is configured as shown in FIG. 1. The illustrated embodiment directly controls the energization of the heat generating loads 11A and 11B of two electric heating panels. by operating the area switching key K ₈ provided, fever load 11A, the heating area by 11B, both heating load 11
A, 11B, the heat load 11A, and the heat load 11B can be switched cyclically in this order.

The power supply system circuit mounted on the printed circuit board 9 has a primary side connected to the AC power supply AC when the power switch SW is turned on, and reduces the AC power supply voltage to a predetermined voltage. Rectifier circuit DB that rectifies the voltage stepped down by the above, a power supply circuit 13 that rectifies and smoothes the rectified voltage and serves as a relay power supply for relay drive circuits 12A and 12B, and further reduces the output voltage of this power supply circuit 13. After smoothing to obtain a constant DC voltage,
Power supply circuit 1 that supplies power to control circuit unit 14 and the like described below
5 and a backup power supply circuit 16 for charging the backup power supply with the output from the rectifier circuit DB.

As shown in FIG. 2, the power supply circuit 13 is composed of a rectifying / smoothing circuit including a diode D ₁ and a capacitor C _{1. The} power supply circuit 13 includes a drive transistor Q and a relay excitation coil Ry in the relay drive circuits 12A and 12B. An output voltage is applied to the series circuit, and an exciting current of the exciting coil Ry flows when the driving transistor Q is turned on.

The power supply circuit 15 comprises a step-down resistor R ₁ , a capacitor C ₂ , and a zener diode ZD _1. The output voltage of the power supply circuit 13 is reduced to a zener voltage of the zener diode ZD ₁ , and the obtained DC voltage is supplied to the power supply. It has manner to the control circuit unit 14 through the switching diode D ₂ as. Further, the backup power supply circuit 16
Represents the rectified output of the rectifier circuit DB via a diode D ₃ and a step-down resistor R _2, and a large-capacity capacitor C for a backup power supply.
₃ Charge the, and supplies the voltage of the backup power supply for a large-capacity capacitor C ₃ steps down to the Zener voltage of the Zener diode ZD _1, to the control circuit unit 14 through the switching diode D ₄ the stepped-down voltage as a backup power supply The switching diode D
₄ constitute a diode OR the switching diode D _2. Here reason was independent power source for charging the large-capacitance capacitor C ₃ backup power supply, the the case of tentatively by charging the large-capacitance capacitor C ₃ backup power supply output of the power supply circuit 15 is charged to a predetermined voltage Takes a considerable time, and the rise of the power supply voltage of the control circuit unit 14 is considerably delayed.

The temperature fuse TF inserted between the step-down transformer Tr and the power switch SW is blown when the inside of the apparatus main body 1 rises to a predetermined temperature or higher due to some influence, so that the power supply of the entire apparatus is cut off. belongs to. Reset circuit 17 is for operations to start the control circuit unit 14 when the power supply voltage supplied to the control circuit unit 14 including a CPU or the like has reached a normal operating voltage and the reset switch SW ₁ is the control circuit section 14 For resetting and restarting the control circuit unit 14 when a runaway occurs due to some influence, mounted on the back side of the front panel 3,
The operation is performed with the front panel 3 removed.

The relay drive circuits 12A and 12B receive a signal from an output port of the control circuit section 14 and turn on / off a corresponding relay, and a relay contact 18 of each relay.
A, 18B are turned on / off, and the relay contacts 18A, 1
The energization of the heat generating loads 11A and 11B is directly controlled by turning on / off 8B. The control circuit unit 14 controls the energization of the heat generating load under the control conditions of the room temperature and the set temperature,
A plurality of control programs are provided in the control circuit section 14 so as to correspond to the plurality of types of heat loads. The two-bit select switch (not shown) of the model selection circuit 19 corresponds to the heat load to be controlled. A control program can be selected.

That is, the set temperature and the room temperature are adopted as the control conditions to determine the temperature control level, and the temperature control level is set to the heating load 11 composed of the heating panel as shown in the figure.
A and 11B are used when the temperature detecting elements 21A and 21A are used.
Select and set a control program for controlling the detected temperature of 1B, and in the case of a heating load such as an indoor air-conditioning heater described later, control is performed so that the room temperature becomes the temperature control level because the temperature detecting element is not used. Select and set the control program to be executed. When the temperature detecting elements 21A and 21B are used, the signals which can be input to the control
The detection signals of 1A and 21B are sent to the floor temperature sensor circuits 30A and 30B.
B is used for conversion.

As for the room temperature, the temperature detection signal of the room temperature detection unit 22 outside the device connected to the connection terminal 20 or the built-in room temperature detection unit 5 is taken into the control circuit unit 14 via the room temperature detection unit switching circuit 23. It has become. The switching of the room temperature detection switching circuit 23 is performed by a key switch matrix 25.
It is connected to perform the operation of switching key K _9. Here, since the detected temperature of the room temperature detecting section 5 is affected by the internal temperature of the apparatus main body 1, when the room temperature detecting section 5 is used, the control circuit section 14 sets the detected temperature value to the temperature inside the apparatus main body 1. Therefore, an internal temperature detecting unit 24 including a temperature detecting element such as a thermistor for detecting the internal temperature is provided inside the apparatus main body 1.

The internal temperature detecting section 24 is a relay drive circuit 12 constituting an output section having a large amount of heat generation in the apparatus main body 1.
A, are mounted arranged so as to cover the vicinity of 12B, for example, a large deal of material 27 lower surface of the heat capacity of the printed circuit board 9 to be close to the output printed circuit board 10 of, as shown in FIG. Here, the reason why the internal temperature detecting section 24 is arranged near the output section so as to be covered with the material 27 having a large heat capacity is as follows.

That is, the relay contacts 18A, 18
This is because a change in temperature according to the magnitude of the load current flowing through B can be detected with high sensitivity, and the response to ON / OFF of the output unit is slightly reduced, and the detected temperatures are averaged. The correction of the detected temperature of the room temperature detecting section 5 performed by the control circuit section 14 is based on the following equation. RT = RT ₁ −X − [ (RT ₂ −Y) − (RT ₁ −X)] × α where RT is the temperature at which the apparatus is determined as room temperature, and R
T ₁ is the detected temperature of the room temperature detecting unit 5, X is the temperature rise from the actual room temperature at the no-load detected temperature of the room temperature detecting unit 5 (specific temperature rise for the functioning of the device), and RT ₂ is Y is the temperature detected by the internal temperature detecting unit 24, Y is the temperature rise from the actual internal temperature at the no-load detected temperature of the internal temperature detecting unit 24 (specific temperature rise for functioning of the device), and α is a correction coefficient. Are shown respectively. RT ₂ -Y is a temperature rise at the temperature detected by the internal temperature detector 24 due to the load current, and RT ₁ -Y
-X means the temperature rise at the detected temperature of the room temperature detecting unit 5 due to the load current, respectively . As you can see from the above explanation
RT is the detected temperature of the room temperature detecting unit 5 and the internal temperature detecting unit 2
The detection temperature of the room temperature detection unit 5 is a correction amount determined by the detection temperature of
The temperature is corrected for the degree.

The control circuit section 24 corrects the temperature detected by the room temperature detecting section 5 based on the temperature detected by the internal temperature detecting section 24 by the above equation based on the temperature detected by the internal temperature detecting section 24 to thereby correct the temperature inside the apparatus body 1. Is used as one of the control conditions. Of course, when the room temperature detecting unit 22 outside the device is used, the correction based on the internal temperature is not performed.

The means for setting the room temperature or the floor heating temperature includes a temperature setting down key K ₅ and a temperature setting up key K ₆ connected to the key switch matrix 25 , and these keys K ₅ and K _6. By operating, the lighting of the scale of the temperature setting scale display section 4A of the liquid crystal display 4 shown in FIG. 8 is increased or decreased, so that the set temperature data can be given to the control circuit section. The control circuit unit 14 determines a temperature control level based on the set temperature data and the room temperature, and based on the temperature control level, generates the heat generating loads 11A and 11B.
The relay contacts 18A, 18B of the relay are turned on / off through the relay drive circuits 12A, 12B while feeding back the detected temperatures of the temperature detecting elements 21A, 21B, so that the temperatures of the heat generating loads 11A, 11B are stabilized at the temperature control level. Thus, the energization of the heat generating loads 11A and 11B is controlled.

The temperature control range can be selected by the power adjustment select circuit 28. That is, the temperature control range is selected by setting three power modes of power-down, standard, and power-up according to a two-bit signal of the power adjustment select switches K ₁₀ and K ₁₁ provided corresponding to the power adjustment select circuit 28. has become manner, power adjustment selector switch K _10, K ₁₁ is then exposed setting the operation portion on the front surface of the apparatus body 1 located on the back side of the front panel 3 as shown in FIG. 7, a reset switch SW ₁ Similarly, front panel 3
Remove and operate.

In addition to the temperature setting scale display section 4A, the liquid crystal display 4 has a room temperature display section 4B for displaying room temperature as shown in FIG. 8, a timer set time zone display section 4C for a timer function described later, a timer operation. A display 4D, a time display 4E, and a time name display 4F for displaying whether the display of the time display 4E is the current time or the timer time are provided. The room temperature display section 4B displays the room temperature determined by performing the above correction on the detection temperature of the room temperature detection section 5 taken into the control circuit section 14 or the detection temperature of the room temperature detection section 22 outside the apparatus. The display is controlled by the clock function and the timer function of the control circuit unit 14 that counts the clock for clock output from the clock oscillator 29 and displays the current time and the timer time.

The setting of the current time and the timer time can be set by operating the set / confirm key K ₄ , the time key K ₂ , and the minute key K ₃ , and can be canceled by the cancel key K _1. I have. The timer function is for turning on / off the heater at a desired time.
_4. By operating the time key K ₂ and the minute key K ₃ in a predetermined procedure, three on / off times can be set. For example, when the first “on” time is set, the timer operation display unit 4
The letters "1" and "ON" light up in D. To set the first "OFF" time, the timer operation display section 4D
The characters "1" and "OFF" light up. Thereafter, the characters "2" and "ON" are used to set the second "ON" time, and "2" and "2" are used to set the second "OFF" time.
The character "OFF" lights up, and the character "3" and "ON" are set when the third "ON" time is set, and the characters "3" and "OFF" are set when the third "OFF" time is set. "" Lights up. When the timer time is set, the time name display section 4F indicates that the display of the time display section 4E is the timer time. Of course, when the timer time setting is completed, the display on the time name display section 4F will be replaced by the current time, and the display on the time display section 4E will also be the current time. The contents of the set timer time are displayed in units of one hour on the timer set time zone display section 4C. Confirmation of the set timer time can cancel the contents that have been set by performing well be carried out in the operation of the set / confirmation key K _4, also the operation of the cancel key K _1.

[0032] and the timer operation by the timer function, the switching of operation by manually performed by operating the operation keys K _7, the manual operation control circuit unit 14 by operating the operation keys K _7, timer operation state of the operation stop control circuit The unit 14 sequentially sets the switching. However, when the timer time is not set,
The operation stop and the manual operation are set alternately. Manual operation state in the light emitting diode LED ₁ is provided on the LED matrix circuit 35 under the control of the control circuit unit 14, also the timer operation state are displayed in the light emitting diode LED ₂ provided in the LED matrix circuit 35.

The LED matrix circuit 35 is connected with light emitting diodes LED ₃ and LED ₄ for area display in addition to the light emitting diodes LED ₁ and LED _{2. When the} heating area is switched by operating the area switching key K ₈ , heating load 11A used in accordance with the switching of the heating area under the control of the control circuit section 14 so as to light the light emitting diode LED _3, LED ₄ corresponding to 11B.

In addition to the manual operation and the timer operation, the apparatus of this embodiment can perform telecontrol using a telephone line. Therefore, signals are exchanged between the telephone 31 and the control circuit unit 14 outside the apparatus. A telecon switch unit 32 for performing the operation, an interface unit 33,
And a teleconverter input / output circuit 34. The method of using this telecontrol is as follows. That is, when a predetermined signal is given from the telephone 31 to the tele-con switch unit 32 in the operation stop state, the tele-con switch unit 32 transmits a pulse signal for a predetermined time as an operation control signal to the interface unit 33 and the tele-con input / output circuit 34. The operation state can be provided to the control circuit unit 14 via the control circuit 14. At this time, a signal indicating that the operation state has been entered is supplied from the control circuit unit 14 to the tele-con switch unit 32 via the tele-con input / output circuit 34 and the interface unit 33.
1 is notified that a predetermined operating state has been entered.

Next, when a predetermined signal is given from the telephone set 31 to the tele-con switch unit 32 in the operation state, the tele-con switch unit 32 outputs a pulse signal for a predetermined time as an operation control signal to the interface unit 33 and the telecon input / output circuit. 34 to the control circuit unit 14 to set the operation stop state. At this time, the control circuit unit 1
4, a signal indicating that the operation state has been entered is given to the telecon switch unit 32 via the telecon input / output circuit 34 and the interface unit 33, and the telecon switch unit 32 enters a predetermined operation stop state for the telephone 31. Notify that.

During the timer operation, the operation stop state can be set by the telecontrol operation. When the operation state is set again by the telecontrol operation in the operation stop state, the operation mode is switched from the timer operation to the manual operation mode. Among Naozu 1, 36 is the main clock oscillation circuit for generating a reference clock of the control circuit section 14, 37 in the buzzer driving circuit, the key switch K ₁ ~ key switch matrix 25 under the control of the control circuit section 14 so that the cause Hatsuna the buzzer sound at the time of operation of the K _9.

In the apparatus of this embodiment, when the control circuit unit 14 controls the energization of the heat generating loads 11A and 11B under the control of the set temperature and the room temperature, the control circuit unit 14 The detected temperature of the room temperature detecting unit 5 is corrected by the above-described formula based on the detected temperature of the room temperature, and the corrected room temperature is used as a control condition.
The temperature control levels of 1A and 11B can be accurately controlled.

Here, during operation, the internal temperature detector 2
If the detected temperature of the output unit 4 reaches a preset temperature, the control circuit unit 14 determines that the output unit is overheated due to overload or incomplete connection of the load, and the relay drive circuit 12
Relay contacts 18A, 18 of each relay through A, 12B
B is turned off, and the power supply to the heat generating loads 11A and 11B is turned off. This off state is maintained until the control circuit unit 14 is reset, thereby enhancing safety.

In this embodiment, a runaway monitor processing circuit 38 is provided as a countermeasure against the runaway of the control circuit section 14. The runaway monitor processing circuit 38 receives an alternating waveform output from the control circuit section 14. When it does not enter from the control circuit unit 14 even though this alternating waveform is in operation, it is determined that the control circuit unit 14 has gone out of control, and the relay contacts 1 of each relay are transmitted through the relay drive circuits 12A and 12B.
8A and 18B are forcibly turned off, and the heat generating loads 11A and 1B are turned off.
The power supply to 1B is turned off.

As a countermeasure against a power outage, the power supply voltage monitor circuit 39 is provided in the present embodiment, and the power supply voltage monitor circuit 39 inputs and monitors the output voltage of the rectifier circuit DB. A power failure detection signal is supplied to the control circuit unit 14 when the power is lost. When the power failure detection signal is input, the control circuit unit 14 relays the relay contacts of each relay through the relay drive circuits 12A and 12B so as to extend the time during which the power supply of the backup power supply circuit 16 can back up the memory and the like in the control circuit unit 14. 1
8A and 18B are turned off, and the liquid crystal display 4,
Each light emitting diode LED _{1 to} L of the LED matrix 35
Turn off ED ₄ to reduce power consumption.

In the embodiment shown in FIG. 1, the two heat generating loads 11A and 11B are connected to the relay contacts 18A and 18B.
B to the AC power supply AC via each
Although the energization of A and 11B is controlled by one-sided cutting, as shown in FIG. 9, both ends of a heating load 11 such as one electric heating panel are connected to an AC power supply AC via relay contacts 18A and 18B, respectively. However, it can also be used to control energization by double cutting.

In FIG. 9, reference numeral 21 denotes a temperature detecting element of the heating element 11, and reference numeral 40 denotes a circuit of the entire temperature control device. Further, as shown in FIG. 10, an indoor air conditioner / heater 11 'may be used as a heat generating load instead of a heat generating load such as a heater. In this case, a temperature detecting element for detecting the temperature of the heat generating load becomes unnecessary.

Further, when controlling a large-capacity heat generating load, the heating load is not directly controlled by using the relay contacts 18A and 18B. Instead, as shown in FIG. Heat generation load 11 via 42B
Are connected to an AC power supply AC, and the switching contacts 42A, 4
2B is connected to an AC power source AC via the relay contacts 18A and 18B.
8A and 18B, the switching contacts 42A,
The energization of the heat generating load 11 may be controlled by 42B. In this case, the internal temperature of the apparatus
3 will be raised by the load current.

[0044]

According to the first aspect of the present invention, there is provided a room temperature detecting unit for detecting a room temperature, and an output unit for turning on and off a heating load and a switch for opening and closing the heating load. In a temperature control device that controls an output unit based on a room temperature, a room temperature detection unit is disposed in a device main body near a room temperature atmosphere, and an internal temperature detection unit is output in the device main body.
The temperature of the room temperature detector is adjusted by the correction amount determined by the temperature detected by the room temperature detector and the temperature detected by the internal temperature detector. However, even if the temperature is affected by the temperature inside the apparatus main body, the room temperature used as a control condition becomes an accurate one close to the actual room temperature, and as a result, there is an effect that the heat generation load can be appropriately controlled while being close to the room temperature. .

Further , the heat capacity of the internal temperature detecting section is set near the output section.
Internal temperature detection by placing
In addition to improving the detection sensitivity of the sensing unit,
It is possible to average the detected temperatures by slightly dulling the responsiveness to the OFF state, so that there is an effect that accurate correction can be performed.

[0046]

According to a second aspect of the present invention, in the first aspect, when the internal temperature detecting section detects that the detected temperature in the apparatus main body is higher than a predetermined temperature, the supply of the load current to the output section is turned off. from, there is the internal temperature detector can also serve as a detecting means of the abnormal state, the abnormal state such as the temperature inside the apparatus main body is excessively increased, it possible to turn off the power supply to the load from the output unit It is possible to prevent an overload that causes an excessive rise in temperature due to the turning-off, and to prevent a trouble due to a poor connection or the like.

[0048]

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a specific circuit diagram of the above power supply system.

FIG. 3 (a) is a front view showing a state in which the decorative plate is removed. (B) is sectional drawing of the state attached to the wall same as the above. (C) is a side view in the state where the decorative plate was removed.

FIG. 4 is a partially broken perspective view of the main part of the same.

FIG. 5 is a sectional view of a main part of the above.

FIG. 6 is a cross-sectional view showing a mounting state of the internal temperature detecting unit according to the first embodiment;

FIG. 7 is a partially broken front view of the same.

FIG. 8 is a front view of the above liquid crystal display.

FIG. 9 is a diagram showing an example of the configuration of another heating system of the above.

FIG. 10 is a configuration example diagram of another heating system according to the first embodiment.

FIG. 11 is a configuration example diagram of another heating system of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 5 Room temperature detection part 11A, 11B Heat generation load 12A, 12B Relay drive circuit 14 Control circuit part 21A, 21B Temperature detection element 24 Internal temperature detection part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-299277 (JP, A) JP-A-56-151973 (JP, A) Fully open 60-60706 (JP, U) Fully open Showa 59- 63712 (JP, U) Actually open 57-41137 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G05D 23/00-23/32 G01K 1/00-19/00

Claims (2)

(57) [Claims] A room temperature detecting section for detecting a room temperature, a heating load, and an output section for turning on and off energization of a switching device for opening and closing the heating load, wherein the output section is controlled based on the detected temperature of the room temperature detecting section. In the temperature control device, the room temperature detector is placed in the device body near the room temperature atmosphere ,
The temperature detection section is located near the output section in the main body of the device.
A temperature control device, wherein the temperature control unit is arranged via a suitable material and corrects the detection temperature of the room temperature detection unit by a correction amount determined by the detection temperature of the room temperature detection unit and the detection temperature of the internal temperature detection unit. 2. The apparatus according to claim 1 , wherein the temperature detected in the apparatus main body is higher than a predetermined temperature.
When the internal temperature detector detects that
2. The temperature control device according to claim 1, wherein the current supply is turned off .