JPH0218492B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a temperature control device for electric blankets, mattress blankets, etc., and particularly to a temperature control device that individually adjusts the temperature of the feet and chest area, and is easy to use and provides a comfortable sleeping environment. The purpose is to provide warming equipment.

Conventional heating devices of this kind have separate temperature control circuits for the two temperature control circuits, each of which is linked with an independent temperature setting knob, in order to individually control the temperature at the feet and chest. The temperature of the heat generating circuits for the feet and chest area was individually set using the volume. Therefore, each time the season changes and the room temperature changes, it is necessary to search for the appropriate temperature for both the feet and the chest, making it extremely inconvenient to use.

The present invention improves on this point and includes a volume that is linked to the foot temperature setting knob and a volume that is linked to the foot and chest temperature difference setting knob, and allows the temperature difference between the feet and chest to be set in advance according to the user's preference. This is a temperature control device that allows you to set the desired temperature for both your feet and chest when the room temperature changes by turning just the foot temperature setting knob.

First, an example of a conventional temperature control device for this kind of heating device will be described below with reference to FIG.

In the figure, 1 is an AC power supply, 2 is a DC power supply circuit for the control unit connected to the subsequent stage and is composed of a diode and a capacitor, and 3 and 3' are temperature sensors for the chest and feet. This temperature sensor 3,
3' has a well-known structure, that is, as shown in FIG.
b, plastic thermistor 3c, sensor electrode 3
d, an outer cover 3e is provided, and the entire structure is linear.

In FIG. 1, 4 and 4' are temperature detection circuits for the chest and feet, respectively, and transistors 4a and 4a' connected to the sensors 3 and 3', resistors 4b,
4b', capacitors 4c and 4c', and converts the AC sensor current I ₄ or I ₄ ' flowing during the negative half cycle of the AC power supply into a DC voltage V ₄ or V ₄ '.

Since the temperature sensors 3 and 3' have negative temperature characteristics, when the temperature becomes high, I ₄ and I ₄ ' increase and the DC voltages V ₄ and V ₄ ' become low voltages. Conversely, as the temperature decreases, I ₄ and I ₄ ′ decrease, and V ₄ and V ₄ ′ become higher voltages. Figure 3 shows this situation.

5 and 5' in Fig. 1 have voltage dividing resistors, one of which consists of volumetric resistors 5a and 5a', and the reference voltage can be adjusted by turning knobs 5b and 5b'. This is a temperature setting circuit. 6 and 6' are the chest area, respectively.
This is a temperature control circuit for the foot area, and the input section has comparators 6a and 6a', which receives the output of the temperature detection circuit 4 or 4' and the output of the temperature setting circuit 5 or 5', and the output circuit 6b. , 6b', the outputs of the temperature detection circuits 4, 4' (hereinafter referred to as temperature signals) are transmitted to the outputs of the temperature setting circuits 5, 5' (hereinafter referred to as temperature signals).
(referred to as temperature setting signal), the power control element 8 connected in series with the heaters 7, 7'
(chest area) or 8' (foot area), and conversely, when the temperature signal is smaller than the temperature setting signal, it is not output. When the power control element 8 or 8' is triggered, the heaters 7 and 7' at the chest and feet are energized, respectively. The heaters 7, 7' and the sensors 3, 3' are mounted close to the main body of the sleeping utensil, and the chest sensor 3 detects the temperature of the main body heated by the chest heater 7, and the temperature of the main body heated by the chest heater 7 is detected. The temperature of the heated body is detected by the foot sensor 3' and temperature control is performed.

FIG. 4 shows an example of the wiring of the main body of an electric blanket or electric bed sheet, and solid lines indicate heaters 7, 7',
The broken lines indicate the sensors 3 and 3', and show how they are wired in two zones, the chest area and the foot area.

In this configuration, in order to set the temperature of the chest and feet of the main body, as shown in Figure 1,
The chest area has a volume 5b that is linked with the knob 5a.
And the foot part is the volume 5 which is linked with the knob 5a'.
As mentioned above, it is inconvenient when the set temperature has to be changed due to changes in temperature etc.

Next, details of the present invention will be described. FIG. 5 shows one embodiment of the present invention, and one of the numbers in the drawing shows one embodiment of the present invention.
4, 6-8 and 1'-4', 6'-8' Furthermore, the structures of the sensors 3, 3' are the same as those shown in FIG. 1, and their explanation will be omitted. The difference from the conventional example lies in the temperature setting circuit. Conventionally, the temperature setting circuits 5 and 5 in FIG.
5', but in the present invention, the temperature at the foot part is set by a volume 9a as a first variable resistor that is linked with the foot temperature setting knob 9'a in FIG. The temperature difference between the feet and the chest is set by a volume 9b serving as a second variable resistor that is linked to the chest temperature setting knob 9'b. The temperature setting signal voltage input to the foot temperature control circuit 6' is Vb, and the output of the DC power supply circuit 2 is Vcc _.
shall be. In addition, the connection point of the V _cc line of the fixed resistance terminal of the chest temperature setting volume 9b is designated as A, the variable resistance terminal is designated as B, and the connection point between the other end of the fixed resistance terminal and the foot temperature setting volume 9a is designated as C. The resistance value of AC between the resistance terminals is R _AC , the resistance value between variable resistance terminal B and fixed resistance terminal C is VR _b , variable resistance 9a
If the resistance value of is VR _a and the resistance value of resistor 9c is R _c , the foot temperature setting signal voltage is V _a and V _b are V _a = V _cc × R _c + VR _a / R _c + VR _a + R _AC = V _cc ×(
1-R _AC /R _c +VR _a +R _AC ) V _b =V _cc ×R _c +VR _a +VR _b /R _c +VR _a +R _AC =V _cc
×(1−R _AC −VR _b /R _c +VR _a +R _AC ) If VR _b is a parameter, VR _a −V _a , VR _a
The relationship between -V _b is as shown in Figure 6. Than this,
When VR _b = OΩ, the V _b curve matches V _a , and there is no temperature difference between the feet and the chest. Also,
If VR _b is increased, V _b will slide upwards from V _a and take on a larger value. As mentioned above, in this embodiment, the higher the temperature setting signal voltage is, the lower the temperature is set, so by arbitrarily setting VR _b , the difference between V _a and V _b , that is, the temperature at the feet and the chest The difference can be set arbitrarily. Therefore, the temperature difference between the feet and the chest can be arbitrarily set using the temperature difference setting knob 9'b.

It goes without saying that the same effect can be obtained even if the temperature sensor and heater are integrated. Figure 7 is a structural diagram of an integrated temperature sensor and heater, and 10 is a core thread;
11 is a heater wire, 12 is a temperature sensitive layer, 13 is a sensor electrode wire, and 14 is an outer cover, and the heater wire 11 also serves as a sensor electrode.

FIG. 8 shows an embodiment of the present invention in which the temperature sensor and heater are integrated, and its operation is exactly the same as that described in FIG.

As described above, in a temperature control device that separately controls the temperature of the feet and chest, as in the present invention, the temperature difference between the chest and feet can be set using a resistor having a variable resistance terminal. If the overall temperature of the feet and chest area is set using a variable resistor, the temperature difference between the feet and chest area can be set to the temperature difference desired by the user using a resistor with a variable resistance terminal. If you keep it in place, even when the season changes or the room temperature changes, just by operating the variable resistor, the foot area,
The temperature of both chest areas can be set to the user's preferred temperature, and with a very simple operation, it is possible to perform extremely comfortable warming while sleeping.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an example of a conventional temperature control device, FIG. 2 is a structural diagram of a temperature sensor, and FIG. 3 is a graph showing the relationship between the temperature of the temperature sensor and the temperature signal.
Fig. 4 is a diagram showing an example of the main body wiring of an electric blanket and electric bed blanket that individually controls the temperature of the chest and feet areas, and Fig. 5 is a circuit diagram showing an example of the temperature control device of the present invention. , Figure 6 is a diagram of the relationship between the resistance value of the chest temperature setting volume and the temperature setting voltage using the resistance value of the chest temperature setting volume as a parameter, and Figure 7 is a one-line system in which the temperature sensor and heater are integrated. FIG. 8 is a circuit diagram of an embodiment of the present invention using a one-line temperature-sensitive heater. 2...DC power supply circuit, 3...Temperature sensor, 3
a... Core yarn, 3b... Sensor electrode wire, 3c... Temperature sensitive layer, 3d... Sensor electrode wire, 3e... Outer cover,
4, 4'... Temperature detection circuit, 6, 6'... Temperature control circuit, 7, 7'... Power control element, 8, 8'... Heater, 9... Temperature setting circuit, 9a, 9b... Volume, 9a', 9b'...knob, 10...core thread, 1
DESCRIPTION OF SYMBOLS 1... Heater wire, 12... Temperature-sensitive layer, 13... Sensor electrode wire, 14... Outer cover.

Claims (1)

[Claims] 1 A heater and a temperature sensor are wired independently to the feet and chest, and first and second temperature detection circuits that detect temperature using the signals from these temperature sensors are connected in series to each other to which a voltage is applied. A variable resistor and a resistor having a variable resistance terminal, a voltage taken out between the variable resistor and the resistor having a variable resistance terminal, and a detected voltage of the first temperature detection circuit are compared to determine whether the temperature of the heater is high. A first temperature control circuit that controls energization of one heater, and compares the voltage taken out from the variable resistance terminal of the resistor having the variable resistance terminal with the detected voltage of the second temperature detection circuit to control energization of the other heater. Second to do
Temperature control device with temperature control circuit.