JPS6032279A - Cloth warmer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cloth-like warming device having a temperature-sensitive element whose characteristics change upon dry cleaning.

Conventional Structure and Problems Conventionally, cloth-like heating devices such as electric blankets that use temperature-sensitive elements whose characteristics change with dry cleaning have only been labeled as prohibiting dry cleaning. However, cloth-like heating devices such as electric blankets are often dry-cleaned and then used again as electric blankets. However, in this case, since a temperature sensing element whose characteristics have changed is used, the control temperature of the cloth heating device naturally changes, which involves the risk of causing burns due to the high control temperature. The structure of an electric blanket as an example of a cloth-like heating device is described first.
As shown in the figure.

1 is a cloth body, and a string-shaped heater 2 is arranged on the cloth body 1. ・3 is a connector and a cord 4 comes out from the controller 5.
and a string-shaped heater 2 disposed on the cloth body 1 are connected. 6 is a power cord.

The configuration of the string heater 2 is not shown in FIG. 7 is the core thread, 8
9 is a temperature sensing electrode wire wound around the core yarn 7, and 9 is a temperature sensing element interposed between it and the heating element 10. Reference numeral 11 denotes an outer sheath that maintains insulation. This outer sheath 11 does not have the ability to block the dry cleaning liquid, and the dry cleaning liquid melts the 4A size of the temperature sensing element 9 and changes the characteristics of the temperature sensing element 9. . FIG. 3 shows changes in the characteristics of the temperature sensing element 9 in terms of temperature-impedance characteristics before (a) and after cleaning (b). Cleaning in this manner increases impedance. This thing has the same impedance Z. It can be seen that if the temperature is taken, the temperature increases from T1 to T2. The control temperature will rise by (T2TI). This shows that dry cleaning involves the risk of burns and the like.

Purpose of the Invention The present invention is to eliminate such conventional problems, and the dry-cleaned cloth heating device stops functioning as a heating device, stops energizing the heating element, and is actively activated. The purpose is to ensure safety.

Structure of the Invention In order to achieve this object, the present invention is provided with a dry cleaning detection section that detects whether or not dry cleaning has been performed and provides this detection signal to the temperature control section.

With this configuration, during dry cleaning, the dry cleaning detection section outputs a signal, and upon receiving the signal, the temperature control section turns off the power control element and stops energizing the heating element.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 6. Note that parts with the same numbers as in FIGS. 1 and 2 are the same parts.

FIG. 4 shows a circuit diagram of an embodiment of the present invention.

A control power source is composed of a resistor 12, a diode 13, and a capacitor 14. The power control element 15 is connected in series with the heating element 10 and is turned on and off by the gate trigger signal VG of the temperature control section A. Resistance 6 tr is a gate resistance. 21 is a temperature detection transistor whose base is grounded. Transistor/1 21 has a base that is conductive when the power control element IF is non-conductive.
Emitter, temperature sensing electrode wire 8, temperature sensing element 9, heating element 10
A current flows through the path, and becomes a temperature detection current determined by the impedance of the temperature sensing element 9.

A resistor 18 and a capacitor 19 connected to the collector of the transistor 21 convert the temperature detection current into a voltage, and generate a temperature detection voltage across the capacitor 19. 20
is a base-emitter reverse voltage suppression diode of the transistor 21, and the transistor 21, the resistor 18, and the capacitor 19 constitute the temperature detection circuit 17. Reference numeral 22 denotes a dry cleaning detection section that detects whether or not dry cleaning has been performed. In this example, in normal conditions, a pulse current is passed from the dry cleaning determination section 41 to the switch section 25 through the temperature detection electrode wire 8 to detect whether dry cleaning has been performed. When this is detected, the current is cut off by the switch section 25, and the current is not allowed to flow. The presence or absence of this current is detected by the dry cleaning determination section 41 and input to the temperature control section A. 31 is a tI-transistor that conducts detection, and 32 is a transistor that drives the transistor 31 and is biased by a resistor 30 connected to the collector. 29 and 33 are resistors, 3
5 is a transistor that drives the transistor 32 and is connected to the base of the transistor 32 via a resistor 34, and the transistor 35 is driven by the pulse vP of the pulse generator B. 36 is a constant current source with diodes 26, 27, 28 The dry cleaning detection transistor 24 is biased through a shift circuit including a resistor 23 and a resistor 23. Further, the constant current source 36 is bypassed as a dry cleaning detection current via the 1-run resistor 31. 25 is a switch section that is turned off by dry cleaning. Therefore, if the switch part 2 is 1.
5 is turned off, the current from the dry cleaning detection section 22 does not flow to the side of the windshield detection electrode wire 8, and the transinutor 24 is turned on.

This causes the goo1-trigger signal v from the temperature control circuit to
G is stopped tl-, L, the power control element 15 is turned off, and the power supply to the heating element 10 is stopped.

Moreover, with this circuit configuration, disconnection of the temperature sensing electrode wire 8 can also be detected at the same time.

The dry cleaning detection section 22 is shown in FIG. 5 and FIG. 6 a and b.
An example of the structure of the switch section 25 and its operation will be explained.

FIG. 5 shows an example of the structure of the switch section 25. As shown in FIG.

Reference numeral 37 denotes a movable piece made of a highly conductive metal with spring properties, and the contact 38 is open.The tip of the movable piece 37, sandwiching the support part 40, is made of, for example, styrene, which can be dissolved by dry cleaning. There is a vent-shaped melting section 39 made of polyolefin and copolymers thereof. 41
is the lead wire.

FIG. 6(a) is a side view of FIG. 5, and shows the normal shape. At this time, force F is applied to the 1st moving piece 37. When the melting portion 39 is melted by dry cleaning, the contact 38 opens and turns off as shown in FIG. 6(b).

Effects of the Invention The cloth-like heating device of the present invention detects dry cleaning,
Since it has a temperature control section and a dry cleaning detection section inputted with a dry cleaning detection signal, when electricity is applied after dry cleaning, the temperature control circuit turns off the power control element and stops electricity supply to the heating element. Therefore, the risk of burns etc. due to the use of cloth-like heating equipment containing F8 moisture-r whose characteristics have changed due to dry cleaning can be avoided.1LJJ, 11. ,:can do.

[Brief explanation of drawings]

Fig. 1 is a 114 diagram of a conventional cloth-like heating device, Fig. 2 is a front view of the same string-like heater, Fig. 3 is a 6-temperature-impedance characteristic diagram of the temperature-sensitive element, and Fig. 4 is a diagram of the present invention. A circuit diagram of a cloth-like heating device according to an embodiment, FIG. 5 is a perspective view of the switch section of the dry cleaning detection section of the same cloth-like heating device, and FIGS. 6 a and b are both dry cleaning of the same cloth-like warming device. It is a side view of the switch part in a detection part. DESCRIPTION OF SYMBOLS 1... Cloth body, 8... Temperature sensing electrode wire, 9... Temperature sensing element, 10... Heat generating element, 1
5...Power control element, 17...Temperature detection circuit, 22...Dry cleaning detection section,
25... Switch section, 41... Dry cleaning determination section. Name of agent: Toshio Nakao, lawyer and 1 other person
g Figure 5 Figure 6 (dl

Claims (3)

[Claims] (1) A power control element that is connected between the power source and the heating element of the cloth body and controls the supply of electricity to the heating element, and a power control element that is interposed between the heating element and the temperature sensing electrode wire in the vicinity thereof. a temperature sensing element, a temperature detection circuit that detects the temperature of the heating element using the temperature sensing element, a dry cleaning detection section that operates when used after dry cleaning, and an output of the dry cleaning detection section and the temperature detection circuit. a temperature control section that controls a trigger signal to the power control element using the output of the circuit as an input; and when a dry cleaning detection signal is input from the dry cleaning detection section to the temperature control section, the power control element is turned off. A cloth-like warming device with a structure that (2) The dry cleaning detection section consists of a switch section and a dry cleaning determination section. Cloth-like heating device 0 according to claim 1, which is configured to determine whether or not it can be implemented. (3) The dry cleaning judgment section is a temperature sensing type (ηg
The cloth-like heating device according to claim 2, which is configured to also detect wire breakage.