JPH0614957A - Heat retaining/therapeutic method for bedding and device therefor - Google Patents

Abstract

PURPOSE:To simplify a device and reduce the cost by applying the negative potential to the device capable of concurrently giving the heat retaining/ therapeutic effects to the bedding such as an electric blanket to obtain the therapeutic effect during the waiting period of heat retention when the heating current is cut off. CONSTITUTION:In the bedding shown by a broken line wherein a heating wire RH is embedded, the output (reference voltage) of a variable resistor VR1 set by a user is compared with the output (detected voltage) of a temperature detector RS detecting the temperature in the bedding by a comparator in an IC. If the reference voltage > detected voltage, a (-) signal is outputted from a pin 6, and a TRIAC Q1 is excited by this signal via a light emitting diode D1. A TRIAC Q2 is excited by the luminescence of the light emitting diode D1 via a photo-coupler Q3, the heating resistor wire RH is excited, and the bedding is heated. If the reference voltage < detected voltage, the heating current is cut off, only the (-) potential is applied, and the therapeutic function is exerted.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for applying heat to a human body in a bedding which can be heated and kept warm, such as an electric blanket and a laying cloth, so as to impart the effect of heat retention and treatment at the same time. Is.

"Prior Art" Bedding that is heated and kept warm by electricity is widely used. In addition, the therapeutic effect of applying a (-) potential to the human body is also known. Therefore, it has been considered to integrally configure the electric insulation and a device expecting a therapeutic effect. However, in terms of the safety of bedding, the electrical wiring inside the bedding needs to be strictly insulated and controlled, and if the heating means and the therapeutic means are dually configured, the weight becomes large, heavy, stiff, and difficult to handle. And it becomes expensive. For that purpose, one function portion is also used, and the switch is manually changed to select either heating or treatment for use. Therefore, especially in the winter, the treatment is practically unusable because the switch is kept warm.

"Means for Solving the Problem" Therefore, the process of heating and keeping heat in the bedding is examined, and the heating by electricity is not continuous in this process, and after heating for a short time, the heating current is cut off and left to stand. The current for heating is supplied after waiting for the temperature inside the bedding to drop to a specified temperature.However, in the present invention, attention is paid to this waiting time, and by applying a therapeutic potential to the heating resistor during this, a special It was found that both functions can be used together without the need for a special device. Since the human body continues to generate heat even during sleep and the bedding in winter has sufficient heat retention, the above waiting time can be accumulated in a normal state compared to the intermittent heat heating time. It was a reasonable time, and it was found that if the treatment function was applied during this waiting time, the function could be sufficiently exerted.

[Embodiment] FIG. 1 shows an example of a circuit of the present invention. A portion surrounded by a dotted line shows a bedding, and RH in the portion is a heating resistance wire, and a rectifier SE and a rectifier SE on the left side thereof are provided. The smoothing capacitor C1 is a therapeutic circuit to be inserted in RH, and the (-) terminal is directly connected to RH. The switch SW2 turns on the AC power to the treatment circuit. R
RS on the right of H is a detector for the temperature inside the bedding, and the voltage change is detected when the electric resistance decreases due to the temperature increase.

The part surrounded by the solid line on the right side of the figure is an IC for controlling heating by temperature, and the numbers on the outer periphery thereof indicate the pin numbers of the legs of the IC. The variable resistor VR1 shown on the right side of the figure presets the approximate temperature T in the bedding desired by the user, and the output of the temperature detector RS is VR.
Pour through 1, make the partial pressure, and put it in IC No. 4,
When the reference voltage> (the voltage of the 4th) is input to the comparator, the reference voltage of the 3rd and the reference voltage of the 3rd are compared, and the signal of (-) is output from the 6th.

This output passes through the light emitting diode D1 to R
Enter the gate of triac Q1 under H to make Q1 conductive. At this time, since the triac wrapped with the light emitting diode D1 and the one-dot chain line constitutes the photo coupler Q3, the current of Q1-RH passes through the diac,
It enters the gate of the triac Q2 placed in the heating circuit of the RH and makes Q2 conductive. SW1 is a switch of the heat insulation heating circuit. This gives the desired temperature T in the bedding
If it is the following, the AC power source is the heating resistor RH as the heating current.
Flows directly to.

When the temperature in the bedding rises and the comparator of the IC has the reference voltage <(voltage of No. 4), the signal of (-) is cut off from No. 6, so that Q1 and Q2 are cut off at the same time and heating is performed. The current is cut off. The set temperature at this time is set as T.

FIG. 2 shows a heating current (solid line) in the heating resistor RH in the bedding and a (-) waveform (dotted line) from the treatment circuit.
The solid lines on the left and right indicate the state of heating by AC, and during this period, the therapeutic (-) is not functioning because Q2 is in the conducting state. However, when the heating current is cut off in the central portion, all the heating resistors RH are cut off except for the (-) connection of the treatment circuit, so that only the (-) potential enters and the treatment function is exerted. Note that the contents of the temperature control IC are publicly known and well-known parts, and therefore description thereof will be omitted. Also, SW1, SW2
Can be independently selected.

"Effect" As described above, in the present invention,
The potential is applied during the waiting time during heat retention, but once the set temperature T is reached, the heating time is short even in the extremely cold season after that, while the waiting time is considerably long, and therefore treatment is performed without any trouble during this time. You can expect an effect. Therefore, as a result, it can be said that both parties are working at the same time. It is general that before the temperature reaches the set temperature T for the first time, it is before going to sleep. Further, at this time, there is a feature that this implementation can be performed by a simple circuit change.

[Brief description of drawings]

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

FIG. 2 is a waveform diagram of a resistance line RH in bedding.

[Explanation of symbols]

RH Heat-generating resistance wire in bedding RS Temperature detector Q1, Q2 Triac Q3 Photo coupler VR1 Temperature setting variable resistor IC Temperature adjustment circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location A61N 1/30 8718-4C F24D 13/02 G 6909-3L H05B 3/00 365 B 8918-3K

Claims (2)

[Claims] 1. In a bedding article having an electric warming device, application of a therapeutic potential is turned on, and electric warmth is turned on.
Then, the temperature detector in the bedding has a variable set operating temperature T
When a signal corresponding to is detected, the treatment function for applying the therapeutic potential is activated by shutting off all the entrances and exits of the heating and heat retaining circuit other than the circuit for applying the therapeutic potential to the heating resistor in the bedding. , When the detector signal falls below the reference temperature T, the circuit for maintaining heat to the heating resistor is made conductive, and the therapeutic function of the therapeutic potential is suspended, and selection is made between heating and maintaining heat in the bedding or applying the therapeutic potential. , And a dual-purpose method and device that enables the combined use of both. 2. A treatment circuit for constantly applying a (-) potential to a heating resistor in the bedding by turning on a switch SW2, and triacs Q1 and Q2 in an inlet / outlet path of the heating resistor.
When the switch SW1 is turned on, the heating / warming circuit for passing the AC power through the heating resistor, and when the temperature detector in the bedding detects a signal corresponding to the variable set operating temperature T, the triacs Q1 and Q2 are simultaneously shut off to detect the detector signal. Includes a heating and heat retention control circuit that simultaneously switches the triacs Q1 and Q2 to the conductive state by detecting that the temperature falls below the reference temperature T. In the ON state of the switch SW1, the same heating resistor is provided during the waiting time for the heat retention heating. Applying a therapeutic (-) potential,
Selection of either SW1, SW2 or SW1, S
A device that combines both heat retention heating and treatment functions that enables W2 to be turned on at the same time.