JPH05317187A - Food warmer - Google Patents

Abstract

PURPOSE:To use an apparatus at a low voltage without impairing the image of a food plate to eliminate the possibility of receiving an electric shock by forming a face-shaped heat generator through applying a specific generated-heat resistant paint to the reverse side of a food warmer. CONSTITUTION:A generated-heat resistant paint containing a specific flat metal- plated powder and resin ingredient is applied to the reverse side of a food plate 1 so that a face-shaped heat generator is formed. The size of the flat metal-plated powder is in the range of 5-100mum mean diameter and 0.01-20mum thickness. The flat metal-plated powder and resin ingredient are mixed so that the flat metal-plated powder is in the range of 40-150 pts.wt. for 100 pts.wt. solid content of the resin ingredient. When a food-warming plate 5 is placed on a food-warming plate cradle 6 and voltage is applied so that, an electrode 3 and terminal 7a exposed from a top-coat paint film 4 respectively come into contact with each other, the face-shaped heat generator 2 generates heat in proportion to a voltage value and transfers the heat to for a long period of time and with the same quality as that at the time when they are made newly. The apparatus requires no high voltage and moreover is satisfactory in usability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food warmer which keeps food at a predetermined temperature by energizing a sheet heating element coated with a heat resistant coating.

[0002]

2. Description of the Related Art Conventionally, this type is disclosed in, for example, Japanese Patent Laid-Open No. 48-6352. FIG. 6 is disclosed in that publication, and this sheet heating element 31 is made of a conductive resin layer and is provided with a strip electrode 32 on one surface thereof.
It is provided between the inner layer 33 and the outer layer 34, which are the side walls of the tank. Then, a voltage is applied between the strip electrodes 32 to cause the planar heating element 31 to generate heat and keep the liquid in the tank warm.

[0003]

However, since the above-mentioned conventional sheet heating element 31 uses a material having a high electric resistivity as the conductive filler, the volume resistivity of the sheet heating element 31 obtained is obtained. The value is too high. Therefore, a high voltage is required to keep the liquid in the tank at a desired temperature, and there is a high risk of electric shock, which is not preferable for safety.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a food warmer which does not require a high voltage and is easy to use.

[0005]

A food warmer according to a first aspect of the present invention is provided with an electrode on a back surface thereof and a resin solid content of 100 on the back surface.
With respect to parts by weight, average diameter 5 to 100 μm, thickness 0.01
A heat-resistant coating material containing a flat metal-plated powder of -20 μm in a predetermined weight ratio is applied.

In the food warmer according to the second aspect of the present invention, an electrode is provided on the back surface and 100 weight parts of resin solid content is provided on the back surface.
A food heat-insulating plate coated with a heat-resistant coating material containing a flat metal-plated powder having an average diameter of 5 to 100 μm and a thickness of 0.01 to 20 μm in a predetermined weight ratio, and the upper part of the plate is in contact with the back surface of the food plate And a food heat insulation dish cradle on which the food dish is detachably installed.

A food warmer according to a third aspect of the present invention has a flexible food dish receiving portion that closely contacts the shape of the back surface of the food dish, and an electrode connected to a power source is provided on the back surface of the food dish receiving portion. A heating resistance coating material containing a flat metal-plated powder having an average diameter of 5 to 100 μm and a thickness of 0.01 to 20 μm in a predetermined weight ratio with respect to 100 parts by weight of a resin solid content on the back surface of the food dish receiving portion. Is applied.

In the food warmer according to the fourth aspect of the present invention, an electrode connected to a power source is provided on at least a wall surface of a food storage chamber for storing food, and a surface on which the electrode is provided has a resin solid content of 100 parts by weight. , Average diameter 5 to 100 μm, thickness 0.01 to 2
A heat-resistant coating material containing a flat metal plating powder of 0 μm in a predetermined weight ratio is applied.

[0009]

According to the first aspect of the invention, since the back surface of the food warmer is provided with the sheet heating element formed by applying the heating resistance paint, a voltage is applied to the pair of electrodes fixed to the sheet heating element. Then, the sheet heating element generates heat to keep the food in the food warmer warm.

A second aspect of the present invention is designed to heat the sheet heating element provided on the back surface of the food heat-insulating plate. The food heat-insulating plate is placed on the food heat-insulating plate cradle and its power supply terminal is used. The pair of electrodes provided on the planar heating element are brought into contact with each other.

According to the third aspect of the present invention, since the back surface of the flexible food dish receiving portion is provided with the pair of electrodes and the planar heating element, when the food dish is placed in the food dish receiving portion, the food The dish receiving portion is deformed so as to be in close contact with the back surface of the food dish, and transmits the heat generated by the sheet heating element.

In the fourth aspect of the invention, since the sheet heating element is provided on at least the wall surface of the food storing chamber for storing the food, the heat generated by the sheet heating element is radiated to the food storing chamber.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a food warmer showing one embodiment of the first and second inventions, and FIG. 2 is a detailed view of a portion A shown in FIG.
FIG. 3 is a plan view of a food heat retaining dish showing an example of the arrangement of electrodes, and FIG. 4 is a sectional view of a food heat retainer showing an embodiment of the third invention.
FIG. 5 is a sectional view of a food warmer showing an embodiment of the fourth invention. In the drawings, the same reference numerals denote the same members.

In FIG. 1, reference numeral 1 is a food plate on which food (warm food) is placed, which is made of an insulating material, and 2 is a sheet heating element provided on the back surface of the plate 1, which is a specific flat metal plating powder. A heating resistance coating material containing a body and a resin component is applied to the back surface of the food dish 1 to form a heating resistance coating film. This thickness is not particularly limited, but is 10 to 500 μm.
Is.

Examples of the base material constituting the flat metal-plated powder include sericite, muscovite, phlogopite, glass, plastic flakes, and the like, as disclosed in JP-A-3-145090. Examples of the metal include nickel, copper, silver and the like. The flat metal plating powder has an average diameter of 5 to 100 μm and a thickness of 0.01 to 2
It is in the range of 0 μm. A crosslinkable resin is used as the resin component, and examples thereof include a polyester resin containing an unsaturated group, a hydroxyl group, a carboxyl group, an ester group, an amino group or the like, an acrylic resin, an epoxy resin, a silicone resin, or the like.

The flat metal plating powder and the resin component are mixed in such a proportion that the flat metal plating powder is in the range of 40 to 150 parts by weight with respect to 100 parts by weight of the solid content of the resin component. There is. When a material having good conductivity is used for the food dish 1, an insulating material such as paper is fixed to the back surface of the food dish 1 with an adhesive, and then the heating resistance paint is applied.

Reference numeral 3 denotes an electrode made of a metal tape such as copper or silver, which is arranged on the back surface of the food tray 1 so as to face each other as shown in FIG. It is fixed on the obtained coating film with an adhesive. Reference numeral 4 is a top coating film made of urethane resin having excellent waterproofness, and covers the sheet heating element 2 and the electrode 3. However, the part which the terminal 7a contacts is excluded. The food dish 1, the sheet heating element 2, the pair of electrodes 3 and the top coating film 4 constitute a food dish 5 as described above.

Reference numeral 6 denotes a food heat-insulating plate holder on which the food heat-insulating plate 5 is placed, which is provided with a terminal 7a which contacts the pair of electrodes 3 and a terminal block 7 for supporting the terminal 7a. Reference numeral 8 is a lead wire, one of which is connected to the terminal 7a and the other of which is connected to the power supply line of the voltage regulator 9 described later. The voltage regulator 9 is for adjusting the voltage supplied to the planar heating element 2, and can obtain, for example, an AC voltage of 0 to 30V.

In the food warmer constructed as described above, the food warming tray 5 is placed on the food warming tray holder 6 so that the electrode 3 exposed from the top coating film 4 and the terminal 7a come into contact with each other. Then, when the voltage is applied, the sheet heating element 2 generates heat in proportion to the voltage value and transmits it to the food heat insulating dish 5.

In this embodiment, the voltage supplied to the sheet heating element 2 is exemplified by alternating current, but the sheet heating element 2 may be powered by using a dry battery or a storage battery.

In FIG. 4, 11 is a food warmer according to the third aspect of the present invention, which is provided with a flexible food plate receiving portion 12 which is in close contact with the back surface shape of the food plate 1. This food dish tray 12 is
For example, a pair of electrodes 3 made of a heat-resistant rubber material, on the back surface of which the above-mentioned sheet heating element 2 and lead wire 8 are connected
Is fixed, and an overcoat coating film 4 covering the sheet heating element 2 and the electrode 3 is applied.

The food tray 1 on which the food is placed is placed in the food warmer 11
When placed on the food plate receiving part 12 of
Bends downward due to their weight, as shown in the figure,
The food plate 1 is deformed so as to be in close contact with the back surface shape. Therefore, the cooked food placed on the food dish 1 receives heat from the food dish receiving portion 12 and maintains a high temperature for a long time. Further, if the food dish 1 is covered (or wrapped) with the cooked food placed thereon, the cooked food can be kept warm for a long time.

In FIG. 5, reference numeral 21 denotes a food warmer according to the fourth aspect of the present invention, which is a sheet heating element 2 covered with a top coating film 4 on a side wall and a bottom of a food storage chamber 23 and on one side of an openable / closable cover 22.
And electrode 3 respectively. A material having good heat conductivity and a high emissivity (for example, aluminum coated with a ceramic material) is used for the side wall, the bottom, and one surface of the cover 22. Although not shown, a voltage regulator is built in and is connected to each electrode 3 via a lead wire. 24 is a food table on which food is placed, and a hole is provided on one surface.

In the case of this food warmer 21, the heat generated by the planar heating element 2 is radiantly heated by the food storage chamber 23, so that the food can be warmed by radiation as compared with the food warmer described above. Also, the temperature at which the frozen food is thawed is obtained.

In this description, the case where the sheet heating element 2 and the electrode 3 are provided on the side wall, the bottom and the cover 22 of the food storage chamber 23 is shown. And the electrode 3 may be provided. Further, the food warmer 21 may be provided in a part of the refrigerator to thaw frozen food.

In the first to fourth inventions, a temperature detector for taking in the temperature information of the cooking product or the heat generating surface is provided, and a circuit having a function of adjusting voltage and controlling energization based on the temperature information is added. It may be possible to perform more detailed heat retention and thawing.

The coating material for forming the sheet heating element 2 was formed as follows. Ni-plated sericite (Brand name "METAL-ON, NSER-6", average diameter 30μ
m, thickness 3 μm, metal content 30% by weight, made by Nisso Metal Chemical Co., Ltd. 29.6 g, acrylic resin paint (trade name “High Urethane No. 5000 Clear 51HA”, solid content 40.8% by weight, Made by Nippon Oil & Fat Co., Ltd.) 58.7 g
After stirring for 30 minutes with a dissolver, 11.7 g of a curing agent (trade name "high urethane curing agent HA", solid content 48% by weight, manufactured by NOF CORPORATION) was mixed. Then, a diluted thinner (trade name "urethane thinner W", manufactured by NOF CORPORATION) was used to dilute the Ford cup # 4 to a viscosity of 15 seconds to obtain a heat-resistant paint. The content of the Ni-plated sericite powder in the obtained coating material was 100 parts by weight based on 100 parts by weight of the coating resin solid content.

The heating resistance paint was applied by air spray coating so that the dry film thickness was 100 μm, and then 30 ° C. at 140 ° C.
Minute baking and drying were performed to obtain a sheet heating element 2. The volume specific resistance value of the obtained sheet heating element 2 was 0.02 Ω · cm. Urethane resin coating (high urethane 2000 clear 21HA and high urethane hardener HA
5 to 1 weight ratio mixture, each of which is a trade name of NOF CORPORATION) was applied to form a top coating film 4.

[0029]

According to the first and second aspects of the present invention, the average diameter is 5 to 1 with respect to 100 parts by weight of the resin solid content on the back surface of the food plate.
Since the heating resistance paint containing flat metal plating powder of 00 μm and thickness of 0.01 to 20 μm in a predetermined weight ratio is applied, the heating mechanism is very thin and the image of a food dish is broken. There is no. In addition, since it can be used at a low voltage, there is no risk of electric shock and it is safe, and it is possible to keep cooked food with fresh quality for a long time.

Further, according to the third aspect of the invention, since the heat-resistant paint is applied to the flexible food plate receiving portion provided on the upper part of the food warmer, the shape of the food plate is concerned. It can be used without any problems and can be placed on the table without any discomfort, and since it has few heating mechanisms, it can be made inexpensive and compact.

Further, according to the fourth aspect of the invention, since the food storage chamber to which the heat-resistant paint is applied is provided, not only the cooking section can be kept warm but also the frozen food can be thawed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a food warmer showing an embodiment of the first and second inventions.

FIG. 2 is a detailed view of a portion A shown in FIG.

FIG. 3 is a plan view of a food heat insulating dish showing an example of arrangement of electrodes.

FIG. 4 is a cross-sectional view of a food warmer showing an embodiment of the third invention.

FIG. 5 is a cross-sectional view of a food warmer showing an embodiment of the fourth invention.

FIG. 6 is a diagram showing an example of use of a conventional sheet heating element.

[Explanation of symbols]

 1 Food dish 2 Sheet heating element 3 Electrode 4 Top coat

Claims (4)

[Claims] 1. An electrode is provided on the back surface, and flat metal plating powder having an average diameter of 5 to 100 μm and a thickness of 0.01 to 20 μm is provided in a predetermined weight ratio with respect to 100 parts by weight of a resin solid content on the back surface. A food warmer characterized by being coated with an exothermic resistance paint contained therein. 2. An electrode is provided on the back surface, and flat metal plating powder having an average diameter of 5 to 100 μm and a thickness of 0.01 to 20 μm is provided in a predetermined weight ratio on the back surface with respect to 100 parts by weight of a resin solid content. A food heat-insulating plate coated with the contained heat resistance paint,
An upper portion is formed so as to contact the back surface of the food dish, a power supply terminal connected to the electrode is provided on the upper portion, and a food warming tray pedestal on which the food dish is detachably installed is provided. Characteristic food warmer. 3. A food dish receiving portion that is in close contact with the shape of the back surface of the food dish, and an electrode that is connected to a power source is provided on the back surface of the food dish receiving portion. Resin solid content 10
0 part by weight, average diameter 5 to 100 μm, thickness 0.0
A food warmer characterized by being coated with a heating resistance paint containing a flat metal plating powder of 1 to 20 μm in a predetermined weight ratio. 4. An electrode connected to a power source is provided on at least a wall surface of a food storage chamber for storing food, and an average diameter of 5 to 100 is provided on the surface on which the electrode is provided for 100 parts by weight of resin solid content.
A food warmer characterized by being coated with a heating resistance paint containing a flat metal-plated powder having a thickness of 0.01 to 20 μm in a predetermined weight ratio.