A food insulation pad

Abstract

The invention discloses a food insulation pad, which includes a base, a heat insulation layer, a first electrical insulation layer, an electric heating layer, a second electrical insulation layer and a heat conductive layer. The upper surface of the base is provided with convex ribs, which are arranged in an annular shape. The heat insulation layer is arranged inside the annular space surrounded by the convex ribs. The heat insulation layer is fixed to the upper surface of the base, and the upper surface of the heat insulation layer is flush with the height of the convex ribs. The first electrical insulation layer is fixed to the upper surface of the heat insulation layer, the electric heating layer is arranged on the upper side of the first electrical insulation layer, and the second electrical insulation layer is arranged on the upper side of the electric heating layer. The first electrical insulation layer, the electric heating layer and the second electrical insulation layer are glued and fixed, and the heat conductive layer is fixed to the upper surface of the second electrical insulation layer. The food insulation pad provided by the invention is designed for a single vessel, ensuring the optimal edible temperature of different foods, and the convex heat insulation structure fits more closely with the concave bottom of the food vessel, and the contact area is larger, thereby improving the heat conduction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of dining supplies, and in particular to a food insulation pad. Background Art

[0002] With the development of economy and the progress of society, food is not only used to satisfy people's needs of satisfying hunger and quenching thirst, but also to meet people's needs for table culture. In the process of gatherings and banquets, people can not only deepen their feelings and enhance friendship, but also exchange information and negotiate business. As the time spent on communication is getting longer and longer, the dining time is also getting longer and longer. The best eating temperature of general dishes or hot drinks is between 40 and 60 degrees Celsius, and the ambient temperature of people's dining is usually around 20 degrees Celsius. After hot dishes and hot drinks are placed on the table, their temperature will drop below 40 degrees Celsius in about 20 minutes. At this time, relatives and friends have just finished greeting and have not eaten yet, and the deliciousness of the dishes has been lost, which makes people feel cramped and lose their appetite, seriously affecting people's dining interest and communication atmosphere.

[0003] Existing food insulation products use overall flat insulation products that cover the entire dining table, use 220-volt AC power, and insulate all food placed on the dining table indiscriminately, which cannot meet different insulation requirements. In addition, the flat structure prevents the heat-conducting surface from being in close contact with the nest-shaped (concave) bottom structure of food containers such as plates, cups, and bowls, resulting in inefficient heat conduction, high power consumption, large heat loss, and low insulation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a food insulation pad to solve the problem that the existing food insulation products have low insulation efficiency and cannot meet the requirements of different foods for different insulation temperatures.

[0005] To achieve the above-mentioned purpose, the present invention provides a food insulation pad, which includes a base, a heat insulation layer, a first electrical insulation layer, an electric heating layer, a second electrical insulation layer and a heat conductive layer. The upper surface of the base is provided with a convex rib, and the convex rib is arranged in a ring shape. The heat insulation layer is arranged on the inner side of the annular space surrounded by the convex rib. The lower surface of the heat insulation layer is fixed to the upper surface of the base. The upper surface of the heat insulation layer is flush with the height of the convex rib. The first electrical insulation layer is fixed to the upper surface of the heat insulation layer. The electric heating layer is arranged on the upper side of the first electrical insulation layer. The second electrical insulation layer is arranged on the upper side of the electric heating layer. The first electrical insulation layer, the electric heating layer and the second electrical insulation layer are adhesively fixed and connected. The heat conductive layer is fixed to the upper surface of the second electrical insulation layer.

[0006] Wherein, the electric heating layer is a nickel-chromium alloy foil, and the thickness of the nickel-chromium alloy foil is 0.04 mm.

[0007] The nickel-chromium alloy foil is provided with a hole, and a plurality of holes are provided to adjust the resistance value of the nickel-chromium alloy foil.

[0008] Wherein, the food insulation pad also includes a height adjustment pad, and the height adjustment pad is laid on the upper surface of the base located outside the convex rib.

[0009] Wherein, the material of the height adjustment pad is silicone rubber.

[0010] Wherein, the height adjustment pad is provided with one or more.

[0011] The base and the heat-conducting layer are both made of silicone rubber, and the heat-insulating layer is made of ceramic wool insulation material.

[0012] Wherein, the first electrical insulating layer and the second electrical insulating layer are both mica sheets with a thickness of 0.5 mm.

[0013] Wherein, the food insulation pad also includes a power distributor, and the power distributor is connected to the electric heating layer wire.

[0014] Wherein, the power distributor is a DC power supply with an output voltage of 12V.

[0015] The present invention has the following advantages:

[0016] The present invention provides a food insulation pad, whose convex ribs are designed in an annular shape, a heat insulation layer is arranged in the annular space, and a first electrical insulation layer, an electric heating layer, a second electrical insulation layer and a heat conductive layer are arranged in sequence on the heat insulation layer to form a raised heat insulation structure (composed of the first electrical insulation layer, the electric heating layer, the second electrical insulation layer and the heat conductive layer). Since the bottom of a vessel for holding food is concave, the raised heat insulation structure is more likely to contact the concave bottom of the vessel, so that the contact area between the heat conductive layer and the concave bottom is larger, and the heat conduction efficiency is higher. In addition, the food insulation pad provided by the present invention is designed for a single vessel, and the vessels on the entire table are no longer insulated, which effectively solves the needs of different foods for different insulation temperatures and ensures the optimal eating temperature of different foods.

[0017] In addition, the food insulation pad provided by the present invention has an electric heating layer arranged in the interlayer of the first electric insulation layer and the second electric insulation layer, which can effectively insulate and prevent accidents. Moreover, the electric heating layer is a nickel-chromium alloy foil with a thickness of 0.04 mm, which has high heating efficiency. The nickel-chromium alloy foil is provided with holes (hollow patterns), so that the nickel-chromium alloy foil is designed to be an electric heating layer with different resistance values, which is convenient for heat preservation of different foods and meets the requirements of different foods for different heat preservation temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the food insulation pad provided in Examples 1 and 2.

[0019] In the figure: 1-base, 2-insulating layer, 3-first electrical insulating layer, 4-electric heating layer, 5-second electrical insulating layer, 6-thermal conductive layer, 7-convex ribs, 8-height adjustment pad. DETAILED DESCRIPTION

[0020] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0021] Example 1

[0022] like Figure 1 As shown, embodiment 1 provides a food insulation pad, which includes a base 1, a heat insulation layer 2, a first electrical insulation layer 3, an electric heating layer 4, a second electrical insulation layer 5 and a heat conductive layer 6. The shape of the top view of the base 1 can be rectangular, circular, elliptical or fan-shaped, but is not limited to these shapes. At the same time, the size of the base 1 is not limited to adapt to different food utensils. The upper surface of the base 1 is provided with a convex rib 7, and the convex rib 7 and the base 1 can be integrally formed or fixed by adhesive. The convex rib 7 is annularly arranged on the upper surface of the base 1. The ribs 7 divide the upper surface of the base 1 into two areas, one area is the inner side of the annular space surrounded by the convex ribs 7 (heat preservation area), which is used to set the heat preservation structure (insulation layer 2, first electrical insulation layer 3, electric heating layer 4, second electrical insulation layer 5 and heat conductive layer 6), and the other area is the outer side of the annular space surrounded by the convex ribs 7 (load-bearing area), which is used to bear the weight of the food utensils. The annular space can be, but is not limited to, a circular ring, a square ring, an elliptical ring, or a fan-shaped ring to adapt to the bottoms of different food utensils (the bottom is concave).

[0023] The thermal insulation layer 2 is arranged inside the annular space surrounded by the convex ribs 7, the lower surface of the thermal insulation layer 2 is fixed to the upper surface of the base 1, and the upper surface of the thermal insulation layer 2 is flush with the height of the convex ribs 7. The thermal insulation layer 2 is arranged inside the annular space surrounded by the convex ribs 7 to block the heat energy generated by the thermal conductive layer 4 from being conducted to the base 1, so that the heat energy is conducted to the thermal conductive layer 6, thereby improving the heat utilization rate.

[0024] The first electrical insulating layer 3 is fixed to the upper surface of the thermal insulation layer 2, and the fixing method can be adhesive fixing. The electric heating layer 4 is arranged on the upper side of the first electrical insulating layer 3, and the second electrical insulating layer 5 is arranged on the upper side of the electric heating layer 4. The electric heating layer 4 is fixed between the first electrical insulating layer 3 and the second electrical insulating layer 5 with high-temperature resistant adhesive. The thermal conductive layer 6 is fixed to the upper surface of the second electrical insulating layer 5, and the fixing method can be adhesive fixing.

[0025] In the present embodiment, the electric heating layer 4 is resistively heated, and nickel-chromium alloy foil is preferably used as the heating resistor of the electric heating layer 4. The nickel-chromium alloy foil has the characteristics of heating immediately after power is applied and heating up rapidly. Compared with other electric heating materials, the nickel-chromium alloy foil can greatly shorten the preheating time and reduce the power consumption, and has the effect of high efficiency and energy saving. In the present embodiment, the thickness of the nickel-chromium alloy foil is 0.04 mm, and this thickness does not affect the adhesion between the first electric insulating layer 3 and the second electric insulating layer 5, that is, the thickness of the nickel-chromium alloy foil is not greater than the thickness of the adhesive between the first electric insulating layer 3 and the second electric insulating layer 5.

[0026] In this embodiment, the nickel-chromium alloy foil is provided with holes (not shown in the figure), and there are multiple holes. The shapes of the multiple holes can be different or the same. The arrangement of the multiple holes is not limited, and the purpose is to adjust the resistance value of the nickel-chromium alloy foil. In a preferred embodiment of this embodiment, an etching or laser engraving process is used to change the current loop of the nickel-chromium alloy foil through the combination of multiple holes, so as to accurately obtain different resistance values ​​required by the electric heating layer 4.

[0027] In this embodiment, the thermal conductive layer 6 is made of silicone rubber, and the good elasticity, plasticity and heat resistance of silicone rubber are utilized to make the thermal conductive layer 6 flexibly and closely contact with the bottom surface of the eating utensils, so as to improve the efficiency of heat conduction; the thermal insulation layer 2 is made of ceramic wool insulation material, which has low cost and good thermal insulation performance; the base 1 is also made of silicone rubber to avoid rigid contact between the bottom flange of the eating utensils and the base 1, and the high compressive strength and large friction coefficient of silicone rubber are utilized to achieve the purpose of bearing the weight of the eating utensils, while increasing the friction between the eating utensils and the insulation pad, and between the insulation pad and the dining table, to play an anti-slip role.

[0028] In this embodiment, the first electrical insulation layer 3 and the second electrical insulation layer 5 are both mica sheets with a thickness of 0.5 mm, so that the electrical insulation performance is safe and reliable and easy to assemble.

[0029] In this embodiment, the thermal insulation pad can be made into thermal insulation pads of different sizes, different plane geometric shapes, and different heat energy outputs to meet the different thermal insulation temperature requirements of food utensils of different sizes and different geometric shapes.

[0030] Example 2

[0031] Embodiment 2 provides another food insulation pad, and its structure is basically the same as the food insulation pad provided in Embodiment 1. Only the differences are described below.

[0032] like Figure 1As shown, in this embodiment, the food insulation pad also includes a height adjustment pad 8, which is laid on the upper surface of the base 1 outside the convex rib 7. The height adjustment pad 8 is used to adjust the height of the load-bearing area of ​​the base 1 so that the insulation structure is consistent with the concave bottom of the food container.

[0033] In this embodiment, the material of the height adjustment pad 8 is silicone rubber, which avoids the bottom flange of the eating vessel from rigidly contacting the height adjustment pad 8 and increases the friction between the two.

[0034] In this embodiment, one or more height adjustment pads 8 are provided to facilitate height adjustment.

[0035] Example 3

[0036] Embodiment 3 provides another food insulation pad, and its structure is basically the same as the food insulation pad provided in Embodiment 1 or 2, and only the differences are described below.

[0037] In this embodiment, the food insulation pad is also equipped with a power distributor (not shown in the figure). The power distributor is a DC power supply with an output voltage of 12V. The voltage is safer and can avoid electric shock accidents caused by leakage. The power distributor is connected to the electric heating layer 4 wires.

[0038] In a preferred solution of the present embodiment, eight food insulation pads are equipped with a power distributor, and the power distributor is provided with eight power output ports so as to supply power to the eight food insulation pads.

[0039] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A food insulation pad, characterized in that: The food insulation pad comprises a base, a heat insulation layer, a first electrical insulation layer, an electric heating layer, a second electrical insulation layer and a heat conductive layer. The upper surface of the base is provided with convex ribs, the convex ribs are arranged in an annular shape, the heat insulation layer is arranged inside the annular space surrounded by the convex ribs, the lower surface of the heat insulation layer is fixed to the upper surface of the base, the upper surface of the heat insulation layer is flush with the height of the convex ribs, the first electrical insulation layer is fixed to the upper surface of the heat insulation layer, the electric heating layer is arranged on the upper side of the first electrical insulation layer, the second electrical insulation layer is arranged on the upper side of the electric heating layer, and the first electrical insulation layer, the electric heating layer and the second electrical insulation layer are fixedly connected by adhesive bonding, and the heat conductive layer is fixed to the upper surface of the second electrical insulation layer; The electric heating layer is a nickel-chromium alloy foil, and the thickness of the nickel-chromium alloy foil is 0.04 mm; the first electrical insulation layer and the second electrical insulation layer are both mica sheets with a thickness of 0.5 mm; The food insulation pad also includes a height adjustment pad, which is laid on the upper surface of the base located outside the convex rib; the material of the height adjustment pad is silicone rubber; the height adjustment pad is provided with one or more; The nickel-chromium alloy foil is provided with a hole, and a plurality of holes are provided to adjust the resistance value of the nickel-chromium alloy foil; The base and the heat-conducting layer are both made of silicone rubber, and the heat-insulating layer is made of ceramic wool heat-insulating material.

2. The food insulation pad according to claim 1, characterized in that: The food insulation pad also includes a power distributor, which is connected to the electric heating layer wire.

3. The food insulation pad according to claim 2, characterized in that: The power distributor is a DC power supply with an output voltage of 12V.

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