JPS6241699A - Iron - 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 Industrial Application The present invention relates to an iron that uses a heat storage material to suppress the temperature of the base.

Conventional technology Over the past years, so-called cordless irons have been developed, which contain a heat storage material in the base of the iron to suppress the drop in temperature of the base, and improve operability by allowing ironing to be performed by disconnecting from the power source. It is.

This type of iron usually contains a heat storage material in a storage chamber provided in the base to suppress the temperature drop of the base. Examples of heat storage materials used in irons include those that utilize the latent heat of melting of low-melting point metals as disclosed in Japanese Utility Model Application Publication No. 67-7499, and those that utilize the latent heat of melting of low-melting point metals, as disclosed in Japanese Utility Model Application Publication No. 67-7499;
A method using the latent heat of crystal transition of pentaerythritol is known, as disclosed in Japanese Patent No. 71698.

Problems to be Solved by the Invention However, when trying to store such a heat storage material in a storage chamber provided in a base, heat conduction is greatly affected by the contact between the heat storage material and the base during storage. If the contact between the parts is poor, heat conduction will be significantly reduced, and the heat storage material may not be able to sufficiently store heat, or even if heat is stored, the amount of heat cannot be used effectively and the temperature drop in the base may not be suppressed. To solve this problem, attempts have been made to increase the contact area between the heat storage material and the base by installing a protruding member in the storage chamber to ensure heat conduction in this area.
It was not easy to fill the storage chamber with the heat storage material, and the assembly was not easy. Furthermore, with this method of storing the heat storage material in the storage chamber provided in the base, not only is a lid for the storage chamber required, but also a sealing material is required to seal the heat storage material, which increases the number of parts and requires two assembly steps. The increase in man-hours was unavoidable.

Means for Solving the Problem In order to solve this problem, the present invention uses anhydrous sodium sulfate alone or a heat storage material and a heating element mainly composed of sodium sulfate.
To provide an iron which can be embedded in a base made of aluminum casting at the time of casting to ensure heat conduction between a heat storage material and the base, and which can be produced at a low cost.

Function The heat storage material used in the present invention utilizes the crystal transition of anhydrous sodium sulfate (endothermic transition from an orthorhombic form to a single crystal form), and anhydrous sodium sulfate alone has a transition temperature of about csOT19 at a transition point of about 260°C. It has a latent heat of transition of , and a melting point of 88
Since the temperature is as high as 4°C, it is very stable at temperatures below this temperature, and at the same time has low corrosivity to metals and small volume change. Furthermore, since it is used as a medicine and bath additive, there is no safety problem even if it comes into contact with the human body.

As described above, anhydrous sodium sulfate is very stable below its melting point and is easy to handle, so it can be embedded and molded at the same time as the heating element when casting the aluminum base.

Since the casting temperature of aluminum is usually 600 to 600°C, anhydrous sodium sulfate does not liquefy or decompose to generate gas at this time. In addition, the thermal contraction of anhydrous sodium sulfate at this time is smaller than that of aluminum during solidification, so by embedding the heat storage material during the casting of the base in this way, it is possible to completely bond the heat storage material and the base. It is possible.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows an iron in an embodiment of the present invention. In the figure, 1.1' is anhydrous sodium sulfate alone, or Li, Na, Rh, and Cs.

It is a heat storage material in which at least one compound of Mg, Ca, Ba and F, CI, Br, I is mixed and made to coexist by heating and melting. Here, regarding the amount of the compound added, for example, in the case of chloride as shown in Figure 2, the transition start temperature of anhydrous sodium sulfate, that is, the heat storage temperature, can be changed as shown in the graph according to the amount of the compound added. can.

In this embodiment, explanation will be given using an example in which 10 mol of KCl is added to anhydrous sodium sulfate and the heat storage temperature is set at about 200°C. The heat storage materials 1 and 1' are formed into plate shapes in advance by press molding, melt molding, etc., and a heating element 2 such as a sheathed heater is sandwiched between the heat storage materials. In addition, as shown in FIG. 3, the heat storage materials 1 and 1' have grooves 1a that match the shape of the heat generating element 2, and a gap is formed between the heat storage material 1 and the heat storage material 1 to support the heat generating element 2. multiple support stands 1
b are formed respectively. In addition, the heat storage material 1 is provided with through holes 1C for improving the flow of aluminum when the base 3 is cast. The base 3 is made by attaching the heating element 2 to the heat storage materials 1, 1' and fixing it in an aluminum casting mold, and casting the heat storage materials 1, 1' in aluminum.
1' and a heating element 2 are buried, and aluminum flows around the heating element 2 and between the heat storage materials 1 and 1' to form a heat transfer plate 4. Further, the thermal contraction of the heat storage materials 1, 1' during aluminum casting is smaller than the thermal contraction during aluminum solidification, so the heat storage materials 1.1' and the base 3 are in complete contact with each other. Furthermore, a vaporization chamber 5 for generating steam and a steam passage 7 communicating with a steam ejection hole 6 on the bottom surface are formed on the top surface of the base 3. 8 is a vaporization chamber lid that covers the upper part of the vaporization chamber 5. 9 transfers the water stored in the tank 10 to the vaporization chamber 5
It is a dripping nozzle that supplies water to the vaporizing chamber 5 through a backing 11 attached to the vaporizing chamber algae 8. Reference numeral 12 denotes an opening/closing rod which is interlocked with a steam button 14 provided at the top of the handle 13, and is moved up and down to control water supply from the dripping nozzle 9. A power supply terminal 16 is electrically connected to the heating element 2 via a temperature controller (not shown), and is connected to a power source to supply power. A temperature control lever 16 is connected to a temperature control device and is used to set the temperature of the base 3.

The operation of the iron configured as above will be described below.

When a power supply is connected to the power supply terminal 16 and electricity is applied, the heating element 2 generates heat, and the heat storage materials 1 and 1 are heated through the heat transfer plate 4 formed between the heat storage materials 1 and 1', and their temperature increases. The base 3 is heated as it rises. At this time, the heat storage materials 1 and 1' are heated over a wide area by the heat exchanger plate 4, so that the temperature increases efficiently in a short time without causing local overheating. Also,
At this time, a temperature gradient occurs between the heat exchanger plate 4 and the base 3,
For example, even if the temperature of base 3 is 200°C, heat storage material 1
In the vicinity of the heat exchanger plate 4 at 1', the temperature temporarily reaches 260°C or more. Therefore, the heat storage materials 1 and 1' exceed the heat storage temperature 20
When the temperature rises above 0°C, it undergoes a crystal transition and remains in a solid state, storing heat as latent heat. Heat storage material 1, 1'
When the power supply is disconnected from the power supply terminal 16, heat dissipation starts, and the temperature drop of the base 3 is suppressed.

In this way, by energizing the power supply terminal 16, the heat storage materials 1, 1' reach the heat storage temperature and store heat.

Therefore, after that, even if the power is disconnected, the heat dissipation of the heat storage materials 1 and 1' suppresses the temperature drop of the base 3, making it possible to iron without a power source, and preventing the power cord from getting caught.
The operability of press work can be improved because the operating range is not limited by the power cord. In addition, when generating steam, operate the steam button 14 and press the opening/closing rod 1.
2 is opened, water is supplied from the dripping nozzle 9 to the vaporizing chamber 6 via the backing 11, and the steam generated here is ejected from the steam outlet 6 via the steam passage 7.

At this time, a large amount of heat is taken away from the vaporization chamber 6, but stable steam can be obtained for a long time without a sudden temperature drop due to the heat dissipation from the heat storage materials 1, 1'.

Next, FIG. 4 shows another embodiment of the present invention. In the figure, a heating element 2, a base 3, a vaporization chamber 6, a steam outlet 6, a steam passage 7, a vaporization chamber lid 8, a drip nozzle 9, a tank 1/1 backing 11, an opening/closing rod 12, a handle 13, a steam button 14, and a power supply terminal. 16. The stiffness adjustment lever 16 is the same as the embodiment shown in FIG.

In the embodiment shown in FIG. 4, a plurality of through holes are provided in each heat storage material when the heat storage materials 17 and 17' are molded in advance. The heating element 2 is sandwiched and fixed to the heat storage materials 1 and 1T' in the same manner as in the previous embodiment, and the base 3 is cast in aluminum by attaching it to a casting mold. Therefore, as shown in the figure, the cast base 3 has a heat transfer plate 1 parallel to the bottom surface of the base 3.
In addition to 8, an effect of the invention is that one plurality of heat transfer fins perpendicular to the bottom surface of the base 3 is formed, and the contact area between the heat storage material 17, 17' and the base 3 is increased to improve heat conduction therebetween. As described above, the present invention provides a heat storage material and a heat generating element by embedding anhydrous sodium sulfate alone or a heat storage material mainly composed of sodium sulfate or a heat generating element in a base at the time of casting the base made of aluminum casting. It is possible to provide an iron with excellent assemblability because the heat storage material and the heating element can be buried at the same time when the base is molded, and the heat storage material and heating element can be buried at the same time when the base is molded.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an iron according to an embodiment of the present invention, Fig. 2 is a characteristic diagram showing changes in transition start temperature due to changes in the composition of the heat storage material, and Fig. 3 is an exploded view of essential parts of the same embodiment. A perspective view, and FIG. 4 is a partially cutaway side view of an iron in another embodiment of the present invention. 1.1', 17, 17'... Heat storage material, 2...
...Heating element, 3...Base. Name of agent: Patent attorney Toshio Nakao and one other person
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Figure 3

Claims (4)

[Claims] (1) An iron in which anhydrous sodium sulfate alone or a heat storage material mainly composed of sodium sulfate and a heating element are embedded in a base made of aluminum casting at the time of casting. (2) The iron according to claim 1, wherein a pre-molded heat storage material and a heating element are integrated and embedded in a base. (3) The iron according to claim 2, wherein a heating element is sandwiched between two heat storage materials formed into plate shapes in advance, and the heating element is embedded in the base. (4) The iron according to claim 3, wherein a plurality of through holes are provided in the heat storage material formed into a plate shape.