JPS625251B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature control device, and more particularly to a temperature control device that allows multiple heating devices to be used together safely with a simple configuration.

Conventionally, when using multiple heating devices such as an electric roof kotatsu on an electric carpet,
The heating temperatures of the electric carpet and the electric roof kotatsu are usually controlled individually, so if the electric carpet and the electric roof kotatsu are used together (used at the same time), the upper limit of the operating temperature of the electric carpet and the electric roof kotatsu will be changed. The upper limit of operating temperature is different, and the heating temperature is the temperature with higher upper limit of operating temperature (in this case, the electric roof kotatsu is used at 80℃, which is 20℃ higher than the electric carpet).
The temperature resistance of electrical carpets, which is the lower end of the upper operating temperature range, is ignored, leading to faster thermal deterioration or even thermal destruction of the heating elements, heat susceptors or other components used. To prevent this, the electric carpet should be energized only, or the electric roof kotatsu should be used at a low heat generation temperature (heating temperature that does not cause thermal deterioration or thermal destruction of the electric carpet). Therefore, the electric carpet and the electric roof kotatsu cannot be used together safely, and the heating function of the electric carpet and the electric roof kotatsu cannot be fully demonstrated.

The present invention relates to a temperature control device that allows a plurality of heating devices to be used together safely with a simple configuration, and allows each of the plurality of heating devices to fully perform its individual functions.

Hereinafter, an embodiment of the temperature control device of the present invention will be described with reference to the drawings, in which an electric roof kotatsu is placed on an electric carpet and used in combination.

As shown in the circuit diagram of FIG. 1, the temperature control device of the present invention includes an AC power source 1, a switch 2, a temperature fuse 3, a first connection terminal 4a of a connector 4, a heating wire 6a of a heating element 6 of an electric carpet 5, The second connection terminal 4b of the connector 4 and the relay contact 7a of the relay 7 are connected in series, and the temperature fuse 3 and the connector 4 are connected in series.
The power supply terminal 9a of the control circuit 9 is connected to the connection point with the first connection terminal 4a of the electric carpet 5, and the power supply terminal 9a of the control circuit 9 is connected to the connection point between the first connection terminal 4a of the connector 4 and the heating wire 6a of the heating element 6 of the electric carpet 5. First heat-sensitive wire 10 of heat-sensitive body 10
a, and a second heat-sensitive wire 10c disposed on the first heat-sensitive wire 10a of the heat-sensitive body 10 via a heat-sensitive layer 10b.
The third connection terminal 4c of the connector 4 is connected to the third connection terminal 4c of the connector 4, and the sensing signal of the control circuit 9 (the sensing signal sensed by the second heat-sensitive wire 10c of the heat-sensitive body 10) is connected to the third connection terminal 4c of the connector 4. Connect the input terminal 9b and connect the relay contact 7a of the relay 7 and the connection point of the AC power source 1 via the variable resistor 11,
A relay coil 7b for driving the relay contact 7a of the relay 7 is connected between the output terminals 9c and 9d of the control circuit 9, and the ground terminal 9e of the control circuit 9 is connected between the variable resistor 11 and the relay contact 7 of the relay 7.
a, and the first connection terminal 4a of the connector 4, the heating wire 6a of the heating element 6 of the electric carpet 5, the second connection terminal 4b of the connector 4, and the relay contact 7a of the relay 7 are connected in series. The above temperature fuse 3 in the circuit
A first heating resistor 12 and a first diode 1 that heat the
3. A heat sensitive layer 6 is attached to the fourth connection terminal 4d of the connector 4 and the heating wire 6a of the heating element 6 of the electric carpet 5.
b, the short-circuit wire 6c disposed via the connector 4
A series circuit consisting of a fifth connection terminal 4e, a second diode 14 arranged with opposite polarity to the first diode 13, and a second heating resistor 15 for heating the temperature fuse 3 is connected in parallel to the electric carpet 5. Electric Yagura Kotatsu 1 is connected in parallel to the heating wire 6a of the heating element 6.
6 power cords 17 and power plugs 18 are connected in parallel.

In the above configuration, the connector 4 is disposed within a joint box 21 attached to one end corner of the electric carpet 5, as shown in FIGS. 2 and 3. The first connection terminals 4a to 4e are formed so that they can be freely connected to and separated from other connectors, and the electric carpet 5 has a heating element 6 and a heat-sensitive element in the area surrounded by the two-dot chain line in the circuit diagram of FIG. The heating element 6 is arranged as shown in FIG.
The heating element 6 is arranged close to the heating element 6 and sandwiched between the cloths 23 and 24 from above and below, and the heating element 6 has a core 6d as shown in FIG. A heating wire 6a is wound around the wire and covered with a heat sensitive layer 6b (a nylon thermistor, in the embodiment, it is made of polyamide resin and melts at about 180°C), and a shorting wire 6c is wound around the heat sensitive layer 6b. The heat sensitive body 10 is formed by winding the first heat sensitive wire 10a around the core body 10d as shown in FIG. The second signal line 10c is wound around the heat-sensitive layer 10b and covered with an insulator 10e. 19
is arranged in the joint box 21 together with the connector 4. Further, the relay contact 7a of the relay 7 is a normally open relay contact, and is closed only when the relay coil 7b is energized. 9, variable resistor 11, first heating resistor 1
2, first diode 13, second diode 14,
The second heating resistor 15 is particularly arranged in a control box 25, as shown in FIGS. 2 and 3, which has a power cord 26 connected to the alternating current power source 1 on one side, and a power cord 26 connected to the AC power source 1 on the other side. A connection cord 28 having a connector 27 connected to the connector 4 of the Intobox 21 is connected, and the resistance value of the variable resistor 11 is varied by a temperature adjustment knob 29, so that the heating temperature can be appropriately set to a predetermined temperature. It is something.

Next, to explain how the temperature control device configured as described above is used, the electric roof kotatsu 16 is placed at a predetermined position on the electric carpet 5, and the power plug 18 of the power cord 17 of the electric roof kotatsu 16 is connected to the Connect to the outlet 19 of the joint box 21 of the electric carpet 5, connect the connector 27 of the connection cord 28 of the control box 25 to the connector 4 of the joint box 21 of the electric carpet 5, and connect the power source of the control box 25. Connect the cord 26 to the AC power supply 1 to make the circuit connection as shown in FIG.
Then, the heating temperature by the electric Yagura Kotatsu 16 is adjusted to a predetermined temperature as appropriate.

The temperature control state in the above case, that is, the operating state of the temperature control device according to the present invention will be explained.

Now, operate the switch knob 30 of the control box 25 to close the switch 2 and connect the AC power supply 1.
When is applied to the electric carpet 5 and the electric roof kotatsu 16, the temperature sensed by the heat sensitive body 10 of the electric carpet 5 is lower than a predetermined value and the impedance of the heat sensitive layer 10b of the heat sensitive body 10 is large. 2. The signal sensed by the heat-sensitive wire 10c is small and the voltage at the sensing signal input terminal 9b of the control circuit 9 is also small. The relay coil 7b of the relay 7 closes the relay contact 7a, and the heating element 6 of the electric carpet 5 and the heating element (not shown) of the electric roof kotatsu 16 are energized, and the heating element 6 of the electric carpet 5 and the heating element (not shown) of the electric roof kotatsu 16 are energized. Electric Yagura Kotatsu 1
The heating element 6 generates heat and heating is performed.

When the heating temperature rises due to the heat generated by the heating element 6 of the electric carpet 5 and the heating element of the electric roof kotatsu 16, and the temperature sensed by the heat sensitive element 10 of the electric carpet 5 becomes higher than a predetermined value, the heat sensitive element 1
0, the impedance of the heat sensitive layer 10b becomes small, and therefore the second heat sensitive wire 10c of the heat sensitive body 10
The signal sensed by the control circuit 9 becomes larger.
The voltage at the sensing signal input terminal 9b of the control circuit 9 also increases, and when the voltage at the sensing signal input terminal 9b of the control circuit 9 becomes greater than a predetermined value, the output terminal 9 of the control circuit 9
c, 9d are no longer output, the current to the relay coil 7b of the relay 7 is cut off, the relay contact 7a is opened, and the current to the heating element 6 of the electric carpet 5 and the heating element of the electric roof kotatsu 16 is stopped. be done.

When the heating temperature by the heating element 6 of the electric carpet 5 and the heating element of the electric roof kotatsu 16 falls below the set value, the heating element 10 of the electric carpet 5
The impedance of the heat-sensitive layer 10b increases,
Therefore, the signal sensed by the second heat-sensitive wire 10c of the heat-sensitive body 10 becomes smaller, and the voltage at the sensed signal input terminal 9b of the control circuit 9 also becomes smaller, and outputs are derived to the output terminals 9c and 9d of the control circuit 9. The relay coil 7b of the relay 7 is then energized, the relay contact 7a is closed by the relay coil 7b, and the heating element 6 of the electric carpet 5 and the heating element of the electric roof kotatsu 16 are energized, so that the electric carpet 5 heating element 6 and electric kotatsu 16
The heating element generates heat and heating is performed again.

Thereafter, the above operations are repeated to control the heating temperature by the electric carpet 5 and the electric roof kotatsu 16 to a predetermined temperature.

In the above case, if the set temperature of the electric roof kotatsu 16 itself is higher than the set temperature of the electric carpet 5, it will be controlled by the set temperature of the electric carpet 5, so it is extremely safe to use them together.
Further, when the set temperature of the electric roof kotatsu 16 itself is low, the electric roof kotatsu 16 independently controls the temperature.

Further, in the above case, the setting of the heating temperature using the electric carpet 5 and the electric roof kotatsu 16 is carried out by operating the temperature control knob 29 of the controller box 25 and changing the resistance value of the variable resistor 11. If the resistance value of 11 is made smaller, the potential of the sensing signal input terminal 9b of the control circuit 9 becomes smaller, and unless the impedance of the heat-sensitive layer 10b of the heat-sensitive element 10 becomes smaller, the control circuit 9
Since the output is not output to the output terminals 9c and 9d of the relay 7 and the relay contact 7a of the relay 7 is not opened, a higher heating temperature is set.
Unless the potential of the sensing signal input terminal 9b becomes larger and the impedance of the heat-sensitive layer 10b of the heat-sensitive body 10 becomes larger, no output is delivered to the output terminals 9c, 9d of the control circuit 9, and the relay contact of the relay 7 Since 7a is not closed, a lower heating temperature is set.

To explain the safety operation of the temperature control device in the above case, if the temperature of the electric carpet 5 and the electric roof kotatsu 16 rises abnormally due to a failure such as welding of the relay contact 7a of the relay 7,
The temperature of the heating element 6 of the electric carpet 5 continues to rise abnormally, and when it reaches a predetermined temperature, the heat sensitive layer 6b of the heating element 6 melts (melts at about 180°C), and the heating element 6
By melting the heat-sensitive layer 6b, the heating wire 6 of the heating element 6
a and the shorting wire 6c are short-circuited, and the AC power supply 1, switch 2, temperature fuse 3, first heating resistor 12, and first
Diode 13, short circuit wire 6c of heating element 6, heat sensitive layer 6b of heating element 6, heating wire 6a of heating element 6, closed circuit of relay contact 7a of relay 7 and/or AC power source 1, second heating resistor 15, second diode 14,
A short circuit wire 6c of the heating element 6, a heat sensitive layer 6b of the heating element 6,
The first heating resistor 12 and/or the second heating resistor 15 generate heat in the closed circuit of the heating wire 6a of the heating element 6, the temperature fuse 3, and the switch 2, and the first heating resistor 12 and/or the second heating resistor 15 generate heat. A safety operation is performed by heating the temperature fuse 3 and blowing it out. In this case, the reason why the first heating resistor 12 and the second heating resistor 15 are provided is to determine which part of the heating element 6 is short-circuited between the heating wire 6a and the short-circuiting wire 6c due to the melting of the heat-sensitive layer 6b of the heating element 6. In the circuit diagram shown in Fig. 1, the short circuit point of the heating element 6 is connected to the first heating resistor 1.
2, the second heating resistor 15 generates heat, and if the short circuit point of the heating element 6 is closer to the second heating resistor 15, the first heating resistor 12 generates heat, and the short circuit point of the heating element 6 is in the middle. If so, both the first heating resistor 12 and the second heating resistor 15 generate heat and the temperature fuse 3
fuse.

In the above embodiment, the electric carpet 5 is used together with the electric roof kotatsu 16, but instead of the electric roof kotatsu 16, it is also possible to use an electric anchor, an electric cushion, etc. It is also possible to use a blanket and an electric kotatsu together, and the present invention is not particularly limited to the above embodiments.

Since the temperature control device of the present invention has the above-described configuration, it can fully utilize the individual heating functions of a plurality of heating devices that are used together, such as an electric kotatsu and an electric carpet, an electric kotatsu and an electric bed blanket, etc.
It can be safely used in combination without causing thermal deterioration or destruction of other components, etc., and is extremely convenient to use when using multiple heating devices together. The heating temperature can be appropriately set to the optimum temperature of the user's preference by the temperature setting means, and the user can comfortably take warm temperatures.

[Brief explanation of the drawing]

Fig. 1 is a circuit configuration diagram showing an embodiment of the temperature control device of the present invention when an electric roof kotatsu is placed on an electric carpet and used in combination, and Fig. 2 is a circuit configuration diagram when an electric roof kotatsu is placed on the electric carpet of Fig. 1. 3 is a plan view of the electric carpet shown in FIG. 2, FIG. 4 is a schematic diagram of the main parts of the heating element of the electric carpet shown in FIG. 3, and FIG. FIG. 2 is a diagram illustrating a main part of a heat sensitive body of an electric carpet. In the drawing, 5 is an electric carpet, 6 is a heating element, 9
1 is a control circuit, 10 is a heat sensitive body, 11 is a variable resistor, 1
6 indicates an electric roof kotatsu, and 29 indicates a temperature control knob.

Claims (1)

[Claims] 1. An energizing means for simultaneously energizing the heating elements of each of a plurality of heating devices used in combination, such as an electric kotatsu and an electric carpet, an electric kotatsu and an electric bed blanket, and the simultaneous energization of the energization means. The temperature generated by the heat generated by each heating element is detected and the energization by the energizing means is controlled by the sensing signal, and the heating temperature generated by the heat generated by each of the heating elements of the plurality of heating devices used in combination is determined as the operating temperature among the plurality of heating devices used in combination. temperature control means for controlling the temperature to a predetermined temperature within the lower upper limit temperature range, and temperature setting means for appropriately setting the heating temperature controlled by the temperature control means to the optimum temperature desired by the user. A temperature control device characterized by: