JPH074679A - Controlling device of temperature - Google Patents

Abstract

PURPOSE:To reduce the cost of an operation for preventing freezing, by providing a temperature setting means which enables execution of temperature setting for preventing freezing separately from temperature setting for heating. CONSTITUTION:A switchover between a timer operation by a timer function and a manual operation for heating is executed by manipulation of an operating key K7. Manipulation for a freezing preventing operation is executed by an operating key K8, and at every time of the manipulation, the freezing preventing operation and a stop of the freezing preventing operation are set alternately. When this freezing preventing operation is set by the manipulation, temperature setting is made in a lower range than a range of temperature setting for heating. In the case when the freezing preventing operation is selected by the operating key K8 for prevention of freezing when the manual operation is conducted by manipulation of the operating key K7 for heating, or when the state of the manual operation is brought forth by the manipulation of the operating key K7 in the course of the freezing preventing operation, accordingly, the manual operation for heating is conducted preferentially, and switching is made over to the freezing preventing operation when the operation is stopped by the operating key K7.

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 indoor air conditioner heater.

[0002]

2. Description of the Related Art A temperature control device used for a heating device such as an indoor air conditioner heater is mainly intended to provide heating by turning on / off a heating load by using room temperature and a set temperature as control conditions. Is.

[0003]

By the way, there are problems in some regions, such as window frames that freeze when the outside air temperature drops significantly during the severe cold of winter, making opening and closing difficult. At this time,
When you put the heating equipment in to warm it up, the room temperature may rise and it may not freeze. If you do not turn on the warm, it will be in the above state. It is also wasteful in terms of running cost to continuously perform heating operation of the heating device for the purpose of preventing freezing.

The present invention has been made in view of the above problems. An object of the present invention is to set the temperature for freezing prevention to set the temperature for warming. On the other hand, it is an object of the present invention to provide a temperature control device capable of independently setting the temperature for freezing prevention and reducing the operation cost for freezing prevention. In addition to the object of the invention of claim 1, the object of the invention of claim 2 is to provide a temperature control device in which the temperature setting range of the anti-freezing is lowered to prevent unnecessary temperature rise in the operation of anti-freezing. To provide.

The object of the invention of claim 3 is that, in addition to the object of the invention of claim 1, a temperature at which warming operation / stop and freezing prevention operation / stop can be independently operated. To provide a control device. The object of the invention of claim 4 is to provide a temperature control device in which the operation for preventing freezing is prevented during the operation for warming, in addition to the object of the invention for claim 3.

The object of the invention of claim 5 is, in addition to the object of the invention of claim 3, that timed operation can be performed by a timer, and both operation for warming and operation for preventing freezing are performed. (2) is set, a warming operation is performed in a time zone set by a timer, and a freezing prevention operation is performed in a time zone other than the time zone set by the timer.

[0007]

According to a first aspect of the present invention, there is provided a room temperature detecting section for detecting a room temperature, and an output section for turning on / off a heating switch directly or for turning on / off a circuit switch device for energizing the heating load.
A temperature control device for controlling ON / OFF of an output section according to a room temperature detection temperature is provided with a temperature setting means capable of setting a temperature for freezing prevention in addition to a temperature setting for warming.

According to the second aspect of the invention, the level of the temperature setting range for preventing freezing is lower than the level of the temperature setting range for warming. According to the third aspect of the present invention, the operation section for starting and stopping the operation corresponding to the level of the temperature setting range for warming, and the operation for starting and stopping the operation corresponding to the level of the temperature setting range for preventing freezing. And a section.

According to the fourth aspect of the invention, if there is a driving operation on both of the operation sections, the driving corresponding to the level of the temperature setting range for warming is prioritized. According to the invention of claim 5, there is provided timer means capable of setting the time period output from the output unit once or a plurality of times during the day, and the operation corresponding to the level of the temperature setting range for warming and freezing. If there is an operation setting for operation that corresponds to the level of the temperature setting range for prevention, priority is given to operation for warming during timer operation, and operation for freeze prevention is performed during times other than timer operation. It is a thing.

[0010]

According to the first aspect of the present invention, the temperature setting means for setting the temperature for warming is provided separately from the temperature setting for warming. The temperature setting for freezing prevention can be set independently, so it becomes easier to set the temperature suitable for the operation for freezing prevention, and as a result, it is possible to reduce the cost of the operation for antifreezing. .

According to the second aspect of the present invention, since the level of the temperature setting range for freezing prevention is lower than the level of the temperature setting range for warming up, the temperature setting more than necessary for the antifreezing operation is performed. This will ensure the cost reduction during freezing prevention operation. According to the invention of claim 3,
The operation for preventing freezing and the operation for keeping warm can be operated by independent operation sections.

According to the invention of claim 4, in the invention of claim 3, by prioritizing the warming operation over the antifreezing operation, it is possible to achieve both the purpose of heating and the antifreezing operation. it can. According to the invention of claim 5, there is provided a timer unit capable of setting the time zone output from the output unit once or a plurality of times within a day, and the operation corresponding to the level of the temperature setting range for warming, If there is an operation setting that corresponds to the level of the temperature setting range for freeze prevention, the operation for warming will be prioritized during timer operation, and the operation for freeze prevention during times other than timer operation Because
Freezing prevention operation is automatically performed except during heating when freezing does not occur, and it is possible to prevent freezing during non-heating.

[0013]

EXAMPLES The present invention will be described below with reference to examples. In this embodiment, as shown in FIGS. 3A to 3C, the apparatus main body 1 is embedded and arranged in the embedded hole of the wall W or the switch box by using the mounting frame 2. On the front, a liquid crystal display 4 and a key switch K ₁ for operation
, And display light emitting diodes LED _{1 to} LED _{3 and the} like are arranged, and each display can be visually recognized on the front surface of the apparatus main body 1,
Further, a front panel 3 provided with a transparent window and an operating portion is attached so that key switches can be operated. Further, as shown in FIG. 4, a plate frame 7 mounted around the front panel 3
As shown in FIG. 4, a room temperature detecting section including a temperature detecting element such as a thermistor is provided on the side of the apparatus main body 1 facing the space surrounded by the side edge of the front panel 3 and the frame piece of the mounting frame 2. An accommodating portion 1a for accommodating 5 is bulged, and a communication port 6 communicating with the inside of the accommodating portion 1a is provided on the outer surface of the accommodating portion 1a. Flows into the storage portion 1a and touches the room temperature detection portion 5.

As shown in FIG. 5, the room temperature detector 5 is attached to 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 portion 1a facing the inside of the main body 1
The storage unit 1a is accommodated in the storage unit 1a through the opening, and the opening of the storage unit 1a is closed by the heat insulating material 26 to avoid the influence of the temperature inside the apparatus main body 1. In addition, the printed circuit board 8 has a heat insulating material 2 for the device body 1 in order to prevent the printed circuit board 8 from being affected by convective heat in the device body 1 when there is a gap between the printed circuit board 8 and the device body 1.
It is fixed through 6.

In addition to the printed circuit board 8, two printed circuit boards 9 and 10 are housed in the main body 1 of the apparatus. The printed circuit board 8 has a key switch K _1, ... Device 4, display light emitting diode LED ₁
-LED ₄ and circuit parts such as a control unit are mounted, printed circuit board 9 is provided with power supply circuit parts, and printed board 10 is provided.
The circuit components of the output section system are mounted on each. The printed circuit board 10 is detachably connected to the printed circuit board 9 by a connecting wire (not shown) and a connector (not shown) so that the output section can be easily replaced.

To connect 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 section 22 to be described later, which is provided outside the apparatus, to the back surface of the apparatus main body 1. The connection terminal of the quick connection terminal structure and the connection terminal for the telecontrol of the connector structure are provided. The entire circuit of this embodiment is configured as shown in FIG. 1, and the illustrated embodiment directly controls the energization of the heating loads 11A and 11B of the two electric heating panels.

In the circuit of the power supply system mounted on the printed circuit board 9, the primary side is connected to the AC power supply AC when the power switch SW is turned on, and a step-down transformer Tr for stepping down the AC power supply voltage to a predetermined voltage and this step-down transformer Tr. The rectifier circuit DB that rectifies the voltage that is stepped down by, the power supply circuit 13 that is the relay power supply of the relay drive circuits 12A and 12B by rectifying and smoothing the rectified voltage, and the output voltage of the power supply circuit 13 is further stepped down. After smoothing to obtain a constant DC voltage,
A power supply circuit 1 that supplies power to a control circuit unit 14 and the like described later.
5 and a backup power supply circuit 16 that charges 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 of a diode D ₁ and a capacitor C ₁ , and is composed of a relay exciting coil Ry and a driving transistor Q in the relay drive circuits 12A and 12B. The output voltage is applied to the series circuit so that the exciting current of the exciting coil Ry flows when the driving transistor Q is turned on.

The power supply circuit 15 is composed of 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 stepped down to the zener voltage of the zener diode ZD ₁ , and the obtained DC voltage is supplied to the power supply. Is supplied to the control circuit section 14 via the switching diode D ₂ . Further backup power circuit 16
Is a rectified output of the rectifier circuit DB, a diode D ₃ , a step-down resistor R ₂ and a large capacity capacitor C for backup power
₃ is charged, the voltage of the large-capacity capacitor C ₃ for backup power supply is stepped down to the Zener voltage of the Zener diode ZD ₁ , and the stepped down voltage is supplied to the control circuit unit 14 via the switching diode D ₄ as the backup power supply. And the switching diode D
Reference numeral ₄ constitutes a diode OR together with the switching diode D ₂ . Here, the reason why the power source for charging the backup power source large-capacity capacitor C ₃ is independent is that when the backup power source large-capacity capacitor C ₃ is temporarily charged by the output of the power supply circuit 15, it is charged to a predetermined voltage. This is because it takes a considerable time to delay the rise of the power supply voltage of the control circuit unit 14 considerably.

The temperature fuse TF inserted between the step-down transformer Tr and the power switch SW is blown when the temperature inside the apparatus body 1 rises above a predetermined temperature due to some influence, so that the power source of the entire apparatus is shut off. belongs to. The reset circuit 17 is for starting the operation of the control circuit unit 14 when the power supply voltage supplied to the control circuit unit 14 including a CPU or the like reaches the normal operating voltage, and the reset switch SW ₁ is for the control circuit unit 14 Is for resetting and restarting the control circuit unit 14 when it runs away due to some influence, and is mounted on the back side of the front panel 3,
The front panel 3 is removed for operation.

The relay drive circuits 12A and 12B receive a signal from the output port of the control circuit section 14 to turn on / off the corresponding relays, and the relay contact 18 of each relay.
A / 18B is turned on / off, and this relay contact 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 heating load under the control conditions of the room temperature and the set temperature,
The control circuit unit 14 is provided with a plurality of types of control programs so as to handle a plurality of types of heat generation loads, and a 2-bit select switch (not shown) of the model selection circuit 19 corresponds to a heat generation 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 heating load 11 composed of the heating panel 11 is set at the temperature control level as shown in the figure.
When A and 11B are used, a control program for controlling the temperature detected by the temperature detecting element 21 is selectively set, and in the case of a heating load such as an indoor air conditioner / heater described later, the temperature detecting element 21 is set. Since it is not used, the control program that controls the room temperature to the temperature control level is selected and set. When the temperature detecting element 21 is used, the floor temperature sensor circuit 30 converts the detection signal of the temperature detecting element 21 into a signal that can be input to the control circuit unit 14.

Regarding the room temperature, the temperature detection signal of the room temperature detection unit 22 outside the apparatus 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. Switching of the room temperature detection switching circuit 23 is performed by the key switch matrix 25.
This is done by operating the changeover key K ₉ connected to. Since the temperature detected by the room temperature detector 5 is affected by the internal temperature of the apparatus body 1, the control circuit unit 14 sets the value of the detected temperature to the temperature inside the apparatus body 1 when the room temperature detector 5 is used. The temperature is corrected based on this, and therefore, the inside of the apparatus main body 1 is provided with an internal temperature detecting section 24 including a temperature detecting element such as a thermistor for detecting the internal temperature.

The internal temperature detecting section 24 is a relay drive circuit 12 which constitutes an output section in the apparatus body 1 which generates a large amount of heat.
In the vicinity of A and 12B, for example, as shown in FIG. 6, the lower surface of the printed circuit board 9 adjacent to the printed circuit board 10 of the output section is mounted so as to be covered with a material 27 having a large heat capacity. The reason for disposing the internal temperature detecting section 24 in the vicinity of the output section so as to cover it with the material 27 having a large heat capacity is as follows.

That is, the relay contacts 18A, 18 of the output section
This is because the temperature change according to the magnitude of the load current flowing in B can be detected with high sensitivity, and the responsiveness to the on / off of the output part is slightly damped, and the detected temperature is averaged. The correction of the temperature detected by the room temperature detection unit 5 performed by the control circuit unit 14 is based on the following equation. RT = RT ₁ -X - _{[(RT 2 -Y) - (RT} 1 -
X)] × α where RT is the temperature that the apparatus determines as room temperature, and R
T ₁ is the temperature detected by the room temperature detector 5, X is the amount of temperature increase from the actual room temperature in the temperature detected by the room temperature detector 5 under no load (the amount of increase in the intrinsic temperature for the device to function), and RT ₂ is The temperature detected by the internal temperature detection unit 24, Y is the temperature increase from the actual internal temperature in the temperature detected by the internal temperature detection unit 24 when there is no load (the specific temperature increase for the device to function), and α is the correction coefficient. Are shown respectively. RT ₂ -Y is the temperature rise in the temperature detected by the internal temperature detector 24 due to the load current, RT ₁
-X means the temperature rise in the temperature detected by the room temperature detector 5 due to the load current.

Then, the control circuit section 24 corrects the detected temperature of the room temperature detecting section 5 and the temperature inside the apparatus main body 1 by correcting the detected temperature of the room temperature detecting section 5 based on the detected temperature of the internal temperature detecting section 24 by the above formula. The precise room temperature, which eliminates the influence of, is used as one of the control conditions. Of course, when the room temperature detector 22 outside the apparatus is used, the internal temperature is not corrected.

The means for setting the room temperature or the heating temperature of the floor is composed of a temperature setting down key K ₅ and a temperature setting up key K ₆ , which are connected to the key switch matrix 26. These keys K ₅ , K ₆ By operating the button, the lighting of the scale of the temperature setting scale display section 4A of the liquid crystal display 4 shown in FIG. 8 can be turned up and down to give the set temperature data to the control circuit section 14. The control circuit unit 14 determines the temperature control level based on this set temperature data and the room temperature, and based on this temperature control level, the heating load 11A,
While feeding back the detected temperature of the temperature detecting element 21 of 11B, the relay contacts 18A and 18B of the relay are turned on / off through the relay drive circuits 12A and 12B so that the temperatures of the heat generating loads 11A and 11B are stabilized at the temperature control level. The energization of the heating loads 11A and 11B is controlled.

The temperature control range can be selected by the power adjustment selection circuit 28. That is, the temperature control range is selected by setting three power modes of power down, standard and power up by the 2-bit signal of the power adjustment select switches K ₁₀ and K ₁₁ provided corresponding to the power adjustment select circuit 28. As shown in FIG. 7, the power adjustment select switches K ₁₀ and K ₁₁ are provided with an operation unit exposed on the front surface of the apparatus main body 1 located on the back side of the front panel 3 and the reset switch SW ₁ and Similarly, front panel 3
Remove and operate.

The liquid crystal display 4 includes, in addition to the above temperature setting scale display section 4A, a room temperature display section 4B for displaying room temperature as shown in FIG. 8, a timer set time zone display section 4C for timer function, which will be described later, and a timer operation. A time name display section 4F is provided to indicate whether the display section 4D, the time display section 4E, or the time display section 4E displays the current time or the timer time. The room temperature display section 4B displays the room temperature detected by the room temperature detection section 5 incorporated in the control circuit section 14 or the room temperature detected by the room temperature detection section 22 outside the apparatus, which is confirmed by the above correction, and the time display section 4E displays the detected temperature. The display is controlled by the clock function and the timer function of the control circuit unit 14 that counts and measures the clock clock output from the clock clock oscillation circuit 29, and displays the current time and the timer time.

The current time and the timer time can be set by operating the set / confirmation key K ₄ , the hour key K ₂ , and the minute key K ₃ , and the cancel key K ₁ can be used to cancel. There is. The timer function is to turn on / off the heater at the desired time, and set / confirm key K
_4, the time key K _2, partial key K ₃ enter the three pairs by operating in a predetermined procedure, can set the time of switching, for example, first "ON" time when setting the timer operation display section 4
The letters "1" and "ON" light up at D. Also, when setting the first "off" time, the timer operation display section 4D
The characters "1" and "OFF" will light up. After that, when setting the second "ON" time, the characters "2" and "ON" are set, and when setting the second "OFF" time, it is "2" and "
The character "OFF" lights up, and when the third "ON" time is set, the character "3" and "ON" is displayed when the third "OFF" time is set. The character "" lights up. When this timer time is set, the time name display section 4F indicates that the time display section 4E displays the timer time. Of course, when the timer time setting is completed, the display of the time name display section 4F changes to the current time, and the display of the time display section 4E also changes to the current time. Then, the contents of the set timer time are displayed on an hourly basis in the timer set time zone display portion 4C. The set timer time can be confirmed by operating the set / confirmation key K ₄ , and the set content can be canceled by operating the cancel key K ₁ .

[0031] and the timer operation by the timer function, switching of the operation for heating by manually performed by operating the operation keys K _7, the control circuit unit 14 manually operated by operating the operation keys K _7, the timer operation, the operation stop The control circuit unit 14 sequentially switches and sets the states. However, when the timer time is not set, the operation stop and the manual operation are alternately set. The manual operation state is controlled by the LED under the control of the control circuit unit 14.
Light emitting diode LED provided in the matrix circuit 35
₁ and the timer operating state is the LED matrix circuit 35.
This is indicated by the light emitting diode LED ₂ provided in the.

Further antifreeze driving operation performed by the operation keys K _8, and antifreezing operation every time the operation, and the antifreezing operation is stopped is set alternately. When the operation setting for this antifreezing operation is made, the temperature is set in a range lower than the temperature setting range for heating. Thus, when the operation key K ₇ for heating is in the manual operation state, when the anti-freezing operation is selected by the operation key K ₈ for anti-freezing, or the operation key K ₇ is operated manually during the anti-freezing operation. When this happens, the manual operation for heating is given priority and the operation key K ₇
When the operation is stopped at, it switches to freeze prevention operation. FIG. 12A shows a timing chart during this manual operation.

When the operation key K ₇ for heating is in the timer operation state, when the freeze prevention operation is selected by the operation key K ₈ for freeze prevention, or when the timer operation state is set during the freeze prevention operation, Priority is given to the heating timer operation, and when the timer operation is stopped, the operation switches to freeze prevention operation. FIG. 12B shows a timing chart of this timer operation.

Under the control of the control circuit section 14, the antifreezing operation state is displayed by turning on the light emitting diode LLED ₃ provided in the LED matrix circuit 35. In addition to the above-described manual operation and timer operation, the apparatus of this embodiment is capable of performing telecontrol using a telephone line. Therefore, for exchanging signals between the telephone 31 outside the apparatus and the control circuit unit 14. Teleconverter switch section 32
, An interface unit 33, and a teleconverter input / output circuit 34.

The method of utilizing this telecontrol is as follows. That is, the telephone 31
When a predetermined signal is given to the teleconverter switch unit 32 from
The teleconverter switch unit 32 can give a pulse signal for a predetermined time to the control circuit unit 14 via the interface unit 33 and the teleconverter input / output circuit 34 as an operation control signal to set the operating state. Further, at this time, the signal indicating that the operating state is entered from the control circuit unit 14,
Teleconverter input / output circuit 34, interface unit 3
3 to the teleconverter switch unit 32, and the teleconverter switch unit 32 notifies the telephone set 31 that the predetermined operating state has been entered.

Next, when a predetermined signal is given from the telephone 31 to the teleconverter switch section 32 in the operating state, the teleconverter switch section 32 uses a pulse signal for a predetermined time as an operation control signal and the interface unit 33 and the teleconverter input / output circuit. It can be given to the control circuit unit 14 via the control circuit 34 and can be set to the operation stop state. At this time, the control circuit unit 1
A signal indicating that the operation state has been entered from 4 is given to the teleconverter switch section 32 via the teleconverter input / output circuit 34 and the interface unit 33, and the teleconverter switch section 32 enters a predetermined operation stop state for the telephone 31. Notify you of this.

During the timer operation, the operation stop state can be set by the telecontrol operation, and when the operation state is set again by the telecontrol operation in this operation stop state, the operation mode is switched from the timer operation to the manual operation. Although the freeze prevention operation is independent of the telecontrol operations, when in manual operation mode by and telecontrol operated freeze prevention operation by operating the operation keys K ₈ for antifreeze, with priority manual operation mode drive. In the freeze prevention operation, when the manual operation mode is changed to the stop mode by the telecontrol operation, the operation is switched to the freeze prevention operation.

In FIG. 1, reference numeral 36 is a main clock oscillation circuit for creating a reference clock for the control circuit section 14, and 37 is a main clock oscillation circuit.
Is a buzzer driving circuit, which emits a buzzer sound when the key switches K _{1 to} K ₉ of the key switch matrix 26 are operated under the control of the control circuit unit 14. Thus, 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 conditions of the set temperature and the room temperature, the control circuit unit 14 controls the internal temperature detection unit 24.
The temperature control level of the heat generating loads 11A and 11B can be accurately controlled by correcting the temperature detected by the room temperature detection unit 5 based on the above detected temperature and using the corrected room temperature as a control condition. You can do it.

During operation, the internal temperature detector 2
When the detected temperature of No. 4 reaches a preset temperature, the control circuit unit 14 determines that the output unit is abnormally heated due to overload or incomplete load connection, 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, which enhances safety.

As a countermeasure against the runaway of the control circuit section 14, the apparatus of this embodiment is provided with a runaway monitoring processing circuit 38. The runaway monitoring processing circuit 38 receives the alternating waveform output from the control circuit section 14. , Even though this alternating waveform is in operation, it is determined that the control circuit unit 14 has gone out of control when it cannot enter from the control circuit unit 14, and the relay contact 1 of each relay is passed through each relay drive circuit 12A, 12B.
8A and 18B are forcibly turned off to generate heat loads 11A and 1B.
The power to 1B is turned off.

As a countermeasure against a power failure, the apparatus of this embodiment is provided with a power supply voltage monitor circuit 39. This power supply voltage monitor circuit 39 inputs the output voltage of the rectifier circuit DB and monitors it. A power failure detection signal is given to the control circuit unit 14 when the power is lost. When the power failure detection signal is input, the control circuit unit 14 extends the time during which the power of the backup power supply circuit 16 can back up the memory and the like in the control circuit unit 14 through relay drive circuits 12A and 12B. 1
8A and 18B are turned off, the liquid crystal display 4 and
Each light emitting diode LED _{1 to} L of the LED matrix 35
Turn off ED ₃ to reduce power consumption.

By the way, in the embodiment circuit shown in FIG. 1, the two heating loads 11A and 11B are connected to the relay contacts 18A and 18B.
B is connected to the AC power supply AC via each of them, and each heating load 11
The energization of A and 11B is controlled by cutting into one side, but as shown in FIG. 9, both ends of a heat generating load 11 such as one electric heating panel is connected to an AC power source AC through relay contacts 18A and 18B, respectively. However, it can also be used so as to control energization by double-cutting.

In FIG. 9, reference numeral 21 is a temperature detecting element of the heating element 11, and 40 is a circuit of the entire temperature control device. Further, as shown in FIG. 10, instead of the heat generating load such as a heater, the indoor air conditioner / heater 11 'may be used as the heat generating load. In this case, a temperature detecting element for detecting the temperature of the heat generating load is not necessary.

Further, when controlling a large-capacity heat generating load, instead of directly controlling the energization of the heat generating load by using the relay contacts 18A and 18B, as shown in FIG. Heat generation load 11 via 42B
Is connected to the AC power supply AC, and the switching contacts 42A, 4 are connected.
The drive unit 43 of 2B is connected to the AC power supply AC via the relay contacts 18A and 18B, and the drive unit 43 is connected to the relay contact 1
By controlling with 8A and 18B, switching contacts 42A,
42B may control the energization of the heat generating load 11. In this case, the internal temperature of the apparatus body 1 is the drive unit 4
It will be increased by the load current to 3.

[0045]

The invention of claim 1 comprises a room temperature detecting section for detecting a room temperature and an output section for turning on / off a circuit switch for directly heating the heating load or energizing the heating load. In the temperature control device that controls the on / off of parts, the temperature setting means for setting the temperature for freezing prevention is provided separately from the temperature setting for warming. Since it is equipped with temperature setting means that can set the temperature for prevention, the temperature setting for freezing prevention can be done independently from the temperature setting for warming. It is possible to easily set the temperature suitable for the operation, and as a result, it is possible to reduce the cost of the operation for preventing the freezing.

According to the second aspect of the present invention, since the level of the temperature setting range for freezing prevention is lower than the level of the temperature setting range for warming, the temperature setting more than necessary for the antifreezing operation may be performed. In other words, the effect of ensuring the cost reduction during the antifreezing operation can be obtained. According to the invention of claim 3, the operation section for starting and stopping the operation corresponding to the level of the temperature setting range for keeping warm, and the operation for starting and stopping the operation corresponding to the level of the temperature setting range for preventing freezing. Since it is provided with the section, there is an effect that the operation for preventing freezing and the operation for keeping warm can be operated by independent operation sections.

According to the invention of claim 4, in the invention of claim 3, if there is a driving operation on both of the operation parts, the operation corresponding to the level of the temperature setting range for warming is prioritized. By giving priority to the operation for taking the heat above the operation for preventing freezing, there is an effect that both the purpose of heating and the purpose of preventing freezing can be achieved. The invention of claim 5 is
A timer unit capable of setting the time zone output from the output unit once or a plurality of times within a day is provided, and the operation corresponds to the level of the temperature setting range for warming and the temperature setting range for freezing prevention. If there is an operation setting for the operation corresponding to the level of, the operation for warming is prioritized during the timer operation, and the operation for freezing prevention is performed in the time zone other than the timer operation, so output from the output unit. An operation corresponding to the level of the temperature setting range for warming and an operation corresponding to the level of the temperature setting range for preventing freezing are provided with a timer means capable of setting the time zone once or a plurality of times during the day. If there is an operation setting with, the operation for warming is prioritized while the timer is operating, and the operation for freezing prevention is performed during times other than the timer operation, so it is automatically performed except during heating when freezing does not occur. Freezing prevention operation Done is, the anti-freeze in the non-heating can be achieved.

[Brief description of drawings]

FIG. 1 is a circuit configuration 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 of the same decorative plate removed. (B) is sectional drawing in the state attached to the wall same as the above. (C) is a side view of the same decorative plate removed.

FIG. 4 is a partially cutaway perspective view of an essential part of the above.

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

FIG. 6 is a cross-sectional view showing a mounted state of the internal temperature detection unit of the above.

FIG. 7 is a partially cutaway front view of the above.

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

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

FIG. 10 is a diagram showing a configuration example of another heating system of the above.

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

FIG. 12A is a time chart of an operation example of the heating control device of the present invention. (B) is a time chart of a timer operation example of the heating control device of the present invention.

[Explanation of symbols]

 1 Device Main Body 5 Room Temperature Detection Section 11A, 11B Heat Generation Load 12A, 12B Relay Drive Circuit 14 Control Circuit Section 21A, 21B Temperature Detection Element 24 Internal Temperature Detection Section

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[Procedure amendment]

[Submission date] July 5, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

In addition to the printed circuit board 8, two printed circuit boards 9 and 10 are housed in the main body 1 of the apparatus. The printed circuit board 8 has a key switch K _1, ... Device 4, display light emitting diode LED ₁
~ Circuit components such as the LED ₃ and the control unit are mounted, the printed circuit board 9 is provided with a power system circuit component, and the printed circuit board 10 is mounted.
The circuit components of the output section system are mounted on each. The printed circuit board 10 is detachably connected to the printed circuit board 9 by a connecting wire (not shown) and a connector (not shown) so that the output section can be easily replaced.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

Claims (5)

[Claims] 1. A room temperature detecting unit for detecting a room temperature, and an output unit for turning on / off a heating load directly or for turning on / off a circuit switch for energizing the heating load. The turning on / off of the output unit is controlled by the detected room temperature. A temperature control device comprising a temperature setting means capable of setting a temperature for freezing prevention in addition to a temperature setting for warming. 2. The temperature control device according to claim 1, wherein the level of the temperature setting range for freezing prevention is lower than the level of the temperature setting range for warming. 3. An operation unit for starting and stopping an operation corresponding to a level of a temperature setting range for warming, and an operation unit for starting and stopping an operation corresponding to a level of a temperature setting range for preventing freezing. The temperature control device according to claim 1, further comprising: 4. The temperature control device according to claim 3, wherein if there is a driving operation on both of the operation sections, the driving corresponding to the level of the temperature setting range for warming is prioritized. 5. A timer means capable of setting a time zone output from the output section once or a plurality of times during a day, for operation corresponding to a level of a temperature setting range for warming and for prevention of freezing. If there is an operation setting that corresponds to the level of the temperature setting range, the operation for warming is prioritized during the timer operation, and the operation for freezing prevention is performed in the time zone other than the timer operation. The temperature control device according to claim 3, which is characterized in that.