JPS60228132A - Heater for regional heating - Google Patents

Abstract

PURPOSE:To generate heat regionally at a small sectional area by forming a small sectional area regionally at a portion of electrical conductor and by connecting large sectional areas on the both sides of the small sectional area with the secondary low tension side of the transformer circuit. CONSTITUTION:Pertaining to a heater in which an electrical source 1, a transformer circuit 2 and a regional heat generating material 3 are provided, a secondary voltage at a lower tension side is set 50V or under, normally around one volt, and this low voltage is applied to the large sectional areas on both ends 4. The regional heat generating material 3 has at one of its portions a portion 5 of the small sectional area, and the electrical power used for melting by applying a polyethylene film thereupon is 0.5-5W which is perfectly free from an electric shock.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a heater that generates heat, has good thermal efficiency, and can be manufactured at low cost.

In recent years, there has been a growing need for things such as spot-jointing plastic films, fusing synthetic resin fabric fragments, and locally heating parts of the human body. Became. To meet this need, in most cases a part of the rod-shaped or spiral resistance wire heater is used for heating by providing a projection on a part of the heater.

It cannot be denied that there is a great deal of waste. In addition, as an alternative to this, there may be cases where a semiconductor heater is used spot-on, but it can be used in place of the 9 heat generation capacity, and it can be used around a part of a solid conductor such as a metal. By forming a part with a small cross-sectional area and connecting the large-area parts on both sides with low-voltage terminals by a transformer circuit, the object is achieved by localized heat generation in the small-area part. It is.

i shelter Embodiments will be described in detail below with reference to drawings.

FIG. 1 is a diagram schematically showing the present invention, in which a power source (1)
The overall configuration consisting of a transformer circuit (2), a local heat generating member (3), and a transformer circuit (2) is illustrated in an easy-to-understand manner. Here the power supply (1)
When using AC 100V (-secondary voltage) as a secondary voltage, the secondary voltage on the low voltage side is 50V or less, and in most cases, the low voltage side is 1
Around v is sufficient. The local heat sensing member (3) to which such a low voltage is applied to the wide cross-sectional area portions (4) at both ends has a small cross-sectional area portion (hereinafter referred to as the small cross-sectional area portion (5)) formed in part. ing.

Here, the local heating member (3) will be explained in detail.

As for the material of the local heating member (3), a metal material is excellent in terms of impact resistance during use and workability during manufacturing. As a general property, the specific resistance is small like copper (resistivity 1
．． 7 x 10-6 units) rather than one.

It is preferable that the resistivity be as large as iron (10X IO-%) or higher, and that the specific resistance should not be as large as about 110 μcJL+n. Stainless steel, iron, copper is preferable for the purpose of achieving the purpose of local heat generation by having such a large specific resistance, and considering conditions such as Nitrality, workability, and thermal efficiency, stainless steel is preferable. Stainless steel is ferritic.

Any austenitic material can be used. Figure 2 shows the properties when austenitic 5US304 (18-8) is used.

Figure 2 shows the results of a test on a local heat generating member (stainless steel) having the shape shown in Figure 1.
3) Cut a SUS 304 steel plate with a plate thickness of 0.05 mm into strips with a radius (Dl) of 8 in the large cross-sectional area, provide a notch interval W of 3 mm in the center, and cut the small cross-sectional area ( 5) Width fdl
was changed, and a secondary current was applied to the wide cross-sectional area portions (4) on both sides. Then, commercially available polyethylene film (201
) by applying the small cross-sectional area part (5) to the polyethylene film and measuring the current value when the polyethylene film melts.1 As the heating part width fdl is increased.

It is necessary to apply a high current value. maximum 4
The voltage at the simple width was only 1.1v.

Therefore, the heater for local heating in this example is.

It has the feature of low power consumption of 0.5 to 5 W.

Moreover, since the secondary voltage is low, there is no risk of electric shock, as will be explained below.

Example 1゜Figure 3 (al is strip stainless steel 5US304 (plate thickness 0
．． 03+m) and attach two small cross-sectional areas (
5) This is an example of forming (5). As shown in Fig. fb1, the upper clamping plate (10) and the lower clamping plate (11) are energized in front by the secondary low voltage from the cylinder (13) through the code 0→. It is possible to partially seal the plastic edge θ6) of the tableware packaging pack 05) etc. by heat welding. By the way, the width (d
It is appropriate for l to be 1 to 2,5 m each, and the voltage at that time is adjusted by an adjustment dial (1η), but most heat-weldable plastics are 01 to 5 m.
Low voltage is sufficient. Further, the current value is 8A or less.

Therefore, when using this device, there is no need for a stable like a stapler, so there is no need for stable food to be mixed in with the food, so it is safe, and even if workers use it with wet hands, there is no risk of electric shock. It has features not previously available.

Example 2゜Figures 4 and 5 show the local heating heater (b) of the present invention
This is an example of when it is used for moxibustion. Heater for local heating (b)
The material is used at a relatively low temperature of 100℃ or less, so it is +0
．． A 5m thick iron plate was used. The wide cross-sectional area part (4) (4) has a maximum width of 12 m + width, and the small cross-sectional area part (5) has a width of 05 mm. Such a heater for local heating (b) is wrapped in cloth (a) to make it feel good against the skin. Wide cross-sectional area (4) (4
) is connected to the transformer regulator 0 as described above.
3) is connected to. As shown in FIG. 5, such electromoxibustion C21) is attached to the body of a human body using a holding means such as tape. It can be used in the same way as moxibustion at any temperature and for any time. The current at this time is less than 5A,
The voltage may be 5■ or less.

In the present invention, the method for forming the heat generating part is as follows:
As explained above, there are two methods: one is to cut a metal plate to form the cross-sectional area (5), and the other is to form a thinner part by recessing a part of the metal plate or metal block. is possible. Such a small cross-sectional area can be partially formed within the same member, or can be used in place of a conventional heater in many of the appliances required for thick-walled items (not shown in the figure). It is possible.

The following can be mentioned as advantages.

■Unnecessary parts are not heated, so there is no need for heat dissipation measures like in the past, and there is almost no need for heat resistance of the heater mounting parts).

■ Since heat is generated locally only in the necessary areas, the power consumption is about 100% lower than when using a conventional rod-shaped or plate-shaped heater, contributing to power consumption savings of 1.

■ Low voltage and safe.

■ Great durability.

■ Can be used over a wide range of temperatures from high to low temperatures.

■ Can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the local heating heater of the present invention, and FIG. 2 is a diagram showing the relationship between the width of a portion of the heater and current. FIG. 3 fa+ is a perspective view of an embodiment of the local heating member, and FIG. 3 tb) is a perspective view of the local heating member in use. FIG. 4a) is a partially cutaway view of another embodiment. tbl is a sectional view taken along line AA in the ta+ figure. FIG. 5 is a diagram showing how it is used for electromoxibustion. (υ...power supply (2)...transformer circuit (3)...
Local heating member (4)...Wide cross-sectional area part (5)...Small cross-sectional area CD+...Width of large cross-sectional area td)...Width W of small cross-sectional area...Notch interval α0)...Upper clamping part (11)...Lower clamping part (12)...Local heating heater 03)...Adjuster 0→...Code (
Company)...Cloth making...Electromoxibustion)...Human body (・Suni4et-5r-y) Patent applicant Asano Construction 1st figure 2nd country heater 0ha (1 (knee)) Drawing Engraving (no change in content) No. 61 Procedural Amendment (formality) 1. Indication of the case Patent Application No. 84816 of 1984 2, Title of the invention Local heating heater 3, Connection with the amended person case Patent Applicant 4: Date of amendment order: July 31, 1980 5: Subject of amendment: Drawing 6: Contents of amendment: (b) has been added to Fig. 4, as shown in the attached sheet.

Claims (1)

[Claims] A small cross-sectional area is locally formed in a part of the conductor. A heater for local heating, characterized in that the large cross-sectional area portions on both sides of the small cross-sectional seed portion are connected to the secondary low voltage side of a transformer circuit, and a heat generating portion is formed in the small cross-sectional area portion.