JPH02210786A - Constant temperature keeping heater - Google Patents

Abstract

PURPOSE:To maintain heat generation and heat reservation at a specific temperature for a predetermined time without any temperature controller nor safely equipment by integrally superposing a heat reservoir tightly packed with an electrical insulating packing material on a heat generator made of an emulsion substance. CONSTITUTION:An emulsion substance capable of generation of a phase inversion temperature, which is a main agent of a heat generator 1 filled and sealed in a container 4 made of an insulative material connected to an electrode 7, and a heat reservable substance made of salt containing water capable of changing a phase at a specific temperature are separated from each other to be tightly packed as one body. An electric power is applied to a heat generating portion to heat it up to a specific temperature. During the heating operation of a heat generator 1, a heat reservoir 2 absorbs and reserves the heat. When an inner temperature reaches the preset region of Curie temperature of the heat generator 1, the heat generator 1 automatically stops its heating function, and then, the heat reservoir 2 radiates the heat. Therefore, the specific temperature of a constant temperature heater can be kept for a long time.

Description

Detailed Description of the Invention The present invention utilizes the characteristics of a heat storage body, a heat storage material, a constant temperature heating element exhibiting a phase inversion temperature, and a heat generating material, and combines them to create an efficient constant temperature heat storage type heating element and a heat storage system. Concerning a constant temperature heater that maintains its shape.

Conventional technology Various heating elements have been proposed for conventional heating and heating.For example, a seed cord heater using nichrome wire, a carbon heater, and a printing-etching method using foils of aluminum, copper, iron, etc. Examples include film heaters.

However, none of the proposed heating elements could be used without a thermostat or overcurrent protection necessary for temperature control.

Furthermore, a heating element using barium titanate has been proposed as a heating heater that can set the Curie temperature by utilizing the semiconducting properties of ceramic.

However, in both cases, electricity must be continuously supplied to the heating element in order to maintain heat dissipation.

To compensate for this, we are working to save energy by using temperature-sensing controllers and insulation materials.

Also, in recent years, technology based on the above principle, patent publication 63-16
1270, 63-10345. 63-135726
．． Others have been proposed.

These are made by laminating a heat storage body on a heat generating body, and have been proven to have excellent heat efficiency and long-lasting heating and heat retention.

However, because the process involved in producing a heating element is complicated, conventional methods of integrating a heat storage element into a heat dissipation body have been made by using double-sided adhesive tape on one side of a film heater or sheathed wire heater to store heat. I had to glue and laminate the body. In addition, regarding temperature control, etc., there is a limit to the number of parts that can be used due to not only the heater side but also the relationship with the heat storage body, which not only complicates maintenance, but also affects productivity and costs. .

Means for Solving the Problems The present invention has been devised in view of the above-mentioned problems, and utilizes the latent heat that absorbs and radiates heat when the phase changes at a constant temperature, which is a characteristic of the heat storage body, and the heat storage body. By utilizing the physical properties and characteristics for the temperature adjustment function, the structure can be simplified, saving energy, ensuring safety, and solving the above problems.

This invention uses an emulsion substance that causes a phase inversion temperature, which is a generating agent of a heating element, which is filled and sealed in a container made of an insulating base material equipped with electrodes for conducting electricity, or a flexible packaging film, etc. It is separated from the heat storage material made of hydration salt that undergoes a phase change, and then packaged and packaged as one body.

Simply passing electricity through the heating element heats it up to a predetermined temperature, but while the heating element is operating and heating, the heat storage element absorbs and stores heat, and the entire internal temperature reaches the preset cucumber temperature range of the heating element. Then, the heating element automatically stops the heating function, but
Thereafter, the predetermined temperature of the constant temperature heater is maintained at a constant temperature for a long period of time due to the heat dissipation action of the heat storage body.

The objective is to create a heat radiator that can maintain heat generation and heat storage at a predetermined temperature for a certain period of time without using temperature control or safety equipment. This eliminates the need to constantly supply power to the heater, which can be solved by setting the phase inversion temperature range of the emulsion material to a temperature necessary for melting the heat storage material.

The constant temperature continuous heater has solved the above problems by adopting a structure in which a heating element and a heat storage element are integrated inside.

As the main component of the constant temperature heating element, for example, hexane-based,
You can use an emulsion made by mixing silicone, lithium, water, and an emulsifier in a certain ratio, and the characteristic of this material is that by changing the ratio when mixing,
The phase inversion temperature range can be adjusted from 10 to 95°C.

When the heater is energized, it has low conductivity below the phase inversion temperature, so its resistance increases and it generates heat.

When the temperature of the heating element exceeds a predetermined phase inversion temperature, the conductivity increases and heat generation is suppressed, so that a constant temperature can be maintained.

However, when used as a planar, uniform surface object, it lacks shape retention because it is a fluid, so as a solution to this problem, there is a method of keeping the shape with a container etc. The method involves impregnating a water-containing base material with the above substance, installing a power source in an insulating packaging base material as a support, and sealing it, so that it is not affected by external pressure.

In addition, the heat storage agent substance included is sodium acetate,
Sodium sulfate-based substances, chloride-based substances, and organic substances such as polyethylene glycol and paraffin, etc.
Latent heat storage materials having a temperature range of ~80'C are available.

These heat storage substances consisting of phase-changing water-retaining salts are separated from the heat-generating part using a packaging base material, and then packaged in sealed envelopes, or they are impregnated into a water-containing base material to maintain the shape retention of the substance. It is possible to adopt a structure in which a part of the heater is separated, legalized, and then packaged in a sealed envelope.

As a packaging base material that serves as a support, it has impermeability, electrical insulation properties,
It is sufficient that the seal has strong adhesive properties and is suitable for processing.

When power is supplied to the heat generating part equipped with the working electrode, the temperature of the camphor increases up to the set phase inversion temperature range due to the high conductive resistance. During the temperature rise process, the heat is stored in the heat storage body that is separated and laminated and contained therein by heat conduction.

The temperature of the heat storage body increases from the heat generating part to the melting temperature of the substance by heat conduction, and when the melting temperature of the heat storage substance reaches the phase inversion temperature of the heat generating part, the conductive resistance of the heat generating substance becomes low and the heat generation is automatically suppressed. The temperature changes at a constant temperature.

The temperature of the heating element at this point has also averaged out, and after that, the latent heat of fusion is dissipated during the hardening phenomenon in which the heat storage material undergoes a phase change at a constant temperature. Maintains constant temperature over time.

When the amount of latent heat dissipated decreases, the temperature range within the heating element falls below the phase inversion temperature, so the function of the heating element is restored again and heating is automatically started continuously.

After that, it operates repeatedly according to heat absorption, heat storage, and heat radiation.

Example Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1.2 is a line section showing one embodiment of the constant temperature continuous heater used in the present invention.

FIG. 3 is a perspective view thereof.

In this embodiment, (1) is a heating element, and (2) is a heat storage element. As the heat storage material used, sodium acetate is used, and the material is dissolved (melting temperature 59°C) and impregnated into a water-containing base material such as a non-woven fabric to form a planar body for the purpose of maintaining shape retention. .

The material used for the heating element is water, which is heated at a certain rate so that the phase inversion temperature condition is such that the conductive resistance value drops to 60°C.
Oil (hexane-based or silicone-based) and lyticum are emulsified with an emulsifier according to a predetermined blending ratio, and impregnated into a water-containing base material such as a nonwoven fabric with power contacts on both ends to maintain shape. As shown in the figure, it is housed in an insulating packaging support (4), and (5) the contact portion is connected to a terminal (6) provided outside the packaging support, thereby sealing the packaging. The terminal is (7
) is connected to the power supply.

In this embodiment, when the heat storage body rises to, for example, 60''C, the conductive resistance of the exothermic substance decreases due to the phase inversion temperature difference (Curie temperature), and the current is automatically cut off.

Power terminals at both ends of the constant temperature continuous heater are fixed to a support and connected to internal contacts in an explosion-proof manner to prevent electrical leakage.

The heat storage body (2) utilizes the phenomenon of heat absorption and heat release that occurs when a substance hardens and softens at its melting point.

Although the above-mentioned sodium acetate was used in this example, any compound that exhibits a phase change may be used, such as calcium chloride dihydrate, sodium sulfate decahydrate, sodium thiosulfate pentahydrate, and ethylene chloride. Any material that has a heat storage effect, such as glycol, polyethylene, or wax, may be used.

An aluminum layer (3) is provided in the middle of the heat storage layer (2) from the heat generating part (1) and the support body (4) which prevents leakage in order to promote heat conductivity to the outside and are integrated.

The structure of the constant temperature continuous heater is shown as an example, and the stacking order and shape are not fixed.

When a 100V current was passed from the power source through the heat generating part having the above structure, the temperature continued to rise until the hydrated salt of the predetermined heat storage material was dissolved, and after 33 minutes, the temperature at the contact point with the heat radiator reached 60. The temperature increase stopped when the temperature reached ℃.

Thereafter, the temperature of the heat radiator is maintained at the melting temperature of the heat storage part of 58 °C, reaches 52 °C, and the resistance value of the phase inversion temperature of the heat generating part increases again until heating starts. ), it took 57 minutes and produced a certain heat storage effect.

It has also been found that when used continuously, the heating time is about 10% less than the initial energization time.

That is, in this example, heat could be radiated at a temperature of 52 to 57° C. for 57 minutes, during which time the resistance value of the heating element decreased and energy was cut.

Furthermore, when the heating element was sandwiched between heat insulating materials and used as a heating element for heating, the effect of the heating element was significantly lower.

As a result of the above experiment, no problematic phenomenon occurred regarding the error in the phase inversion temperature setting of the constant temperature heater and the melting temperature setting value due to the phase change of the heat storage element, and even after repeating the experiment several times, no exothermic substances were detected. The physical properties of temperature rising and stopping were as specified.

Furthermore, the heat storage body was not overcooled after melting, and was well cured and radiated the latent heat of fusion.

The heating element was not biased in one direction by the solution of each substance, was uniformly distributed, and had extremely good shape retention.

By changing the ratio of the substances necessary for emulsification of the heating element used, the voltage used can range from 10 to 200 Å.

The usable temperature can be freely selected from 0 to 100°C.

Further, as an example of other applications, it can be applied to heating cushions. In this case, instead of the sheet heating elements with temperature sensors, thermostats, and various controls that have been proposed so far, film heating elements that are printed and etched using foils of iron, aluminum, copper, etc. can be used. However, the control is complicated, and when used repeatedly when used in cushions, etc., parts of the film heater become deformed due to thermal engraving and external pressure, and problems often occur due to partial heat generation or wire breakage due to refraction of the heating wire. Additionally, troubles related to temperature control wiring continued to occur.

In the present invention, the wiring part is only for power supply, and no heating wire is used, so there is no disconnection or partial heat generation, and the heating element has a simple structure, which can compensate for the drawbacks of conventional proposals. Because it can be used, the range of applications is widened.

Applications include floor heating, house warming, mats, carpets, etc., as well as car seats, general chairs, commercial chairs, medical physical therapy equipment, body warmers, bedding, tableware and food, etc.
It can be used as a constant temperature continuous heating element for heating sports equipment and keeping warm.

As described above, the constant temperature continuous heater of the present invention can be used for various purposes, and the type of heating element and the type of base material can be appropriately selected depending on the purpose, and the shape can also be changed in various ways.

Effects The present invention is constructed as described above, and the constant temperature continuous heater does not require a temperature control device, uses an emulsion material whose conductivity changes within a certain temperature range as a heating element, and utilizes latent heat of fusion. Since the heat storage material is integrated, the thermal efficiency is high, and the simple structure allows for low-cost manufacturing with fewer troubles.

The heat dissipation body is characterized by uniform heat dissipation because it is formed into a thin plate shape. Furthermore, since the exothermic substance is an emulsion, there is no partial heat generation due to uneven dispersion, unlike carbon heaters, and since it has heat storage and heat dissipation functions, energy costs are low and heat dissipation is excellent. .

The heat generating part adopted in this product can freely correspond to the voltage used depending on the proportion of the heat generating material, so it has the feature that it can be used in a wide range of fields, from fields using batteries to various industrial fields.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a constant temperature continuous heater of the present invention. FIG. 2 is a line diagram showing one embodiment thereof. FIG. 3 is a perspective view thereof. Power contact 7...Power source 2...Heat storage body 4...Support insulation part 6...Terminal

Claims (3)

[Claims] (1) A heat storage material made of a hydration salt that changes phase at a constant temperature is sealed and packaged with an electrically insulating packaging base material to maintain its shape during melting, and the heat storage material is placed on the side of a heating element made of an emulsion material. Or a constant temperature continuous heater characterized by being integrated by laminating on both sides. (2) Materials made into emulsions by using an emulsion in which the heating element exhibits a phase inversion temperature phenomenon in which, depending on the type of emulsion, conductivity is high at high temperatures and low at low temperatures beyond a certain temperature range. The material is impregnated into a water-containing packaging material such as non-woven fabric, cotton cloth, paper, plastic foam material with open cells, etc., so that the packaging material of the electrically insulating support maintains its shape. , a constant temperature continuous heater according to claim 1, which is provided with a power supply contact and a terminal and is packaged in a sealed envelope. (3) A heat storage agent consisting of an emulsified substance exhibiting a phase inversion temperature and a hydration salt that changes phase at a constant temperature is separated into a container made of an electrically insulating packaging base material, and the heat storage material and heat generating material are sealed. The constant temperature continuous heater according to claim 1, characterized in that the heater is inserted and filled into an electrically insulating container or packaging film as a support that can be integrated, and is sealed with a power supply electrode provided thereon.