JP2011212079A - Heating implement for merchandise mounted on display shelf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform heating so as to prevent a temperature difference between each merchandise products caused by a difference in a mounting position of the merchandise.SOLUTION: A planar heater 1 laid on a display shelf is divided into a plurality of partitions, and a thickness of a heating layer in some partitions is made different from that of other partitions, so that a difference is set among heating temperatures of the partitions. Accordingly, the heating temperature of a front peripheral part 12b where the merchandise is prone to cooling due to an effect of outside air is increased, and the heating temperature of a center part 12a where the merchandise is excessively heated due to a congestion of heat is decreased. Thus, all commodities are evenly warmed despite the difference in the mounting positions of the commodities.

Description

  The present invention relates to a product heating device mounted on a display shelf of a convenience store, for example, and more particularly to a product heating device mounted on a display shelf provided with a planar heating element having different heating layer thicknesses depending on compartments.

  For example, in a store, conventionally, a heat generating structure is provided on a display shelf of merchandise such as drinking water and food to heat or prevent the heat from being cooled. As this heat generating structure, there are a display case in which a shelf and a case main body generate heat, and a structure that raises the temperature overall by circulating internal air (see, for example, Patent Documents 1 and 2).

  Patent Document 1 describes a display case that energizes a conductive film layer applied in a pattern on the front surface of a shelf or a case main body and generates heat evenly on products mounted on the shelf. Patent Document 2 describes a structure in which a heater is provided on a top plate or the like, and air in the storage can be circulated by a fan to keep the product warm.

  Moreover, the heating device for display shelves from which the arrangement density of a nichrome wire changes with divisions is used. This display shelf heating tool is provided with nichrome wires at different intervals on the back side of a plate of steel or the like to increase the heat radiation temperature of the narrow space section and lower the heat radiation temperature of the wide space section. In this way, the product is evenly heated so that no heat is generated in the center.

JP 2009-000176 A JP 2009-34208 A

  However, the conventional display shelf heating structure described above has the following problems to be improved. In other words, even if heat is generated evenly by the conductive film layer applied in a pattern, when the display shelf door is opened, the heat in the case escapes and directly touches the outside air, so the temperature of the product placed near the door decreases. End up. Further, in the means for applying the conductive film layer in a pattern, it is necessary to finely adjust the pattern and the interval in order to prevent the heating temperature from being varied, resulting in an increase in manufacturing cost.

  Further, even if air is circulated by a fan, the shelf and the product itself become an obstacle, and the air cannot reach the entire area of each shelf, and it is difficult to maintain the product at a uniform temperature.

  Furthermore, the display shelf heating tool having different arrangement density of the nichrome wire causes the nichrome wire to be put on the back surface of the plate of steel or the like and further covers the nichrome wire, which increases the cost. Further, the thickness of the nichrome wire and the cover of the nichrome wire is increased, and the display area of the product is narrowed. Moreover, since the weight increases, it takes time to install the display shelf. Furthermore, since the power consumption of the nichrome wire is large, the utility cost increases if it is continuously operated.

  Accordingly, a first object of the present invention is to warm products evenly regardless of the mounting position of the products. A second object is to be easily applied to existing display shelves. A third object is to reduce power consumption and save energy.

  In order to achieve such an object, the feature of the product heating device mounted on the display shelf according to the present invention is that the thickness of the heat generating layer varies depending on the section. That is, the product heating device mounted on the display shelf includes a sheet heating element laid on the display shelf. The sheet heating element includes an insulating sheet, a heating layer provided on the surface of the insulating sheet, And electrodes provided at both ends of the heat generating layer. The heat generating layer has a plurality of sections, and the thickness of the heat generating layer in some of the sections is different from the thickness of the heat generating layer in the other sections.

  Here, the vicinity of the opening on the front side of the display shelf from which the product is taken out, the right side surface, and the left side surface are easily exposed to the outside air, and thus the product placed in the vicinity tends to have a low temperature. On the contrary, the back and center of the display shelves are prone to heat, and the products placed on these shelves tend to be too hot.

  Therefore, the display shelf has an open front, and the plurality of sections have a central portion and a peripheral portion surrounding the central portion, and the peripheral portion is on the front side of the central portion. The front peripheral portion is located, the rear peripheral portion is located on the rear side of the central portion, the right peripheral portion is located on the right side of the central portion, and the left peripheral portion is located on the left side of the central portion. The thickness of the heat generating layer is increased in the order of the front peripheral portion, the right peripheral portion, the left peripheral portion, the rear peripheral portion, and the central portion, and the electrode includes the right peripheral portion and the left peripheral portion of the right peripheral portion. A structure provided on each of the left ends of the portions is desirable. That is, by increasing the heat generation temperature in the peripheral portion where the heat generation layer is thick and decreasing the heat generation temperature in the rear peripheral portion and the central portion where the heat generation layer is thin in sequence, all products can be heated uniformly.

  In addition, the heat generating layers in the plurality of sections are insulated from each other, and the electrodes are provided at both ends of the heat generating layers in the plurality of sections in place of the right end of the right peripheral portion and the left end of the left peripheral portion. Each may be provided. Thereby, the temperature of the heat generating layer can be finely set for the heat generating layers having different thicknesses in the plurality of sections.

  By the way, as a means different from the structure in which the thickness of the heat generating layer is different, the same effect can be obtained by partially covering the surface of the heat generating layer with the heat insulating layer.

  Accordingly, a product heating device mounted on a display shelf according to the present invention includes a planar heating element laid on the display shelf, and the planar heating element includes an insulating sheet and a heating layer provided on the surface of the insulating sheet. And electrodes provided at both ends of the heat generating layer. The heat generating layer may have a plurality of sections, and a heat insulating layer may be provided on the surface of the heat generating layer in some of the sections. Thereby, the heat radiation of the heat generating layer in some sections can be suppressed by the heat insulating layer, and for example, the temperature of the display shelf can be adjusted for each section.

  Furthermore, it is desirable that the heat generating layer is formed by applying a conductive material. As a result, a thinner and lighter planar heating element can be easily formed, so that it is possible to further secure a display space for goods and to reduce manufacturing costs.

  Here, the “display shelf” means an item on which products are displayed or mounted. For example, at least one of a front surface, a rear surface, a right side surface, a left side surface, and an upper surface of the product is taken out or replenished. Applicable is one having an opening. The opening may or may not have a door, a sliding door, or a lid. In addition, the surface having the opening is not limited to a surface that opens entirely, but may be a surface that partially opens as a window.

  The “product” corresponds to beverages such as plastic bottles, processed foods such as confectionery and prepared dishes, or other products that are sold in a warm state. Furthermore, the “planar heating element” is not limited to a planar shape, and may be a spherical surface or a curved surface shape, and may be a flexible one.

  Further, “insulating each other” means providing a gap so that the heat generating layers in the plurality of sections do not contact each other, or separating the heat generating layers with an insulating material. Further, the “heat insulating layer” corresponds to, for example, a material in which a heat blocking material is applied to the surface of the heat generating layer or a heat insulating sheet or the like is attached.

  Next, the effect | action of the heating tool of the goods mounted in the display shelf by this invention is demonstrated.

  Since the thickness of the heating layer of the planar heating element provided in this heating device is different in some sections, if the electrodes provided at both ends of the heating layer are energized, the thicker section generates heat. Since it is large, the temperature of heat dissipation is high, and the volume of heat generation is smaller in the thinner section, so the temperature of heat dissipation is low.

  For example, in a display shelf where products are taken out from the opening on the front side, the peripheral parts such as the front peripheral part are easily deprived of heat by the outside air, but the heat radiation temperature is high, so the temperature of the goods placed in this peripheral part rises. easy. On the other hand, the central portion or the like tends to generate heat, but the temperature of the heat radiation is low, so the temperature of the product placed in the central portion or the like is difficult to rise and does not become too hot.

  According to the present invention, by changing the thickness of the heat generating layer of the planar heating element, for example, the temperature of heat dissipation can be changed for each section. Therefore, if the thickness of the heat generating layer in the plurality of compartments is determined based on the ease of raising the temperature of the product mounted on the display shelf, the temperature of all the products can be made uniform. Thereby, the purchaser can obtain a product at a temperature at which it is easy to eat and drink regardless of the mounting position.

  In particular, by reducing the thickness of the heat generation layer in the central part of the display shelf where heat is easily generated, the temperature rise of the product placed in the central part is suppressed, and the temperature of the product placed in the peripheral part is made equal. be able to. As a result, the purchaser can safely take out the product that has become too hot, for example, without being burned. Moreover, even if the product is placed near the door, the product can be obtained at a temperature at which it is easy to eat and drink without hesitation.

  In addition, by providing electrodes at both ends of the heat generating layer in a plurality of compartments, the temperature of the heat generating layer can be set finely, and appropriate heat dissipation can be obtained to maintain the product at a temperature at which it is easy to eat and drink from any compartment. . As a result, even when there is a difference in the type of products placed or there is a bias in the placement, the temperature of all products can be made uniform.

  In addition, by providing a heat insulating layer on the surface of the heat generation layer in some of the compartments, it is possible to suppress the heat radiation of the compartments, and for example, to adjust the temperature of the display shelf for each compartment. Therefore, a heating element having a simple structure with less manufacturing cost can be provided in the heating tool.

  Furthermore, if the heat generating layer is made of a conductive material, a thin and light planar heat generating element can be manufactured at low cost, and power consumption during operation can be reduced to save energy. As a result, for example, a 24-hour convenience store can always provide merchandise at a temperature that is easy to eat and drink to the purchaser, while reducing utility costs.

It is a top view of a planar heating element. It is sectional drawing of a planar heating element. It is sectional drawing of a planar heating element. It is a top view of another planar heating element. It is sectional drawing of another planar heating element. It is sectional drawing of another planar heating element. It is a top view of another planar heating element. It is sectional drawing of another planar heating element. It is a top view of another planar heating element. It is sectional drawing of another planar heating element. It is sectional drawing of another planar heating element. It is a conceptual diagram of the planar heating element laid on the display shelf.

  Hereinafter, with reference to FIGS. 1-12, the structure and effect | action of the heating tool of the goods mounted in the display shelf by this invention are demonstrated. First, the configuration of the heating tool will be described with reference to FIGS.

  As shown in FIG.1 and FIG.2, the heating tool of the goods mounted in the display shelf is provided with the planar heating element 1 laid in a display shelf. The planar heating element 1 includes an insulating sheet 11, a heat generating layer 12 provided on the surface of the insulating sheet, and electrodes 13 provided on both ends of the heat generating layer. The heat generating layer 12 has a plurality of sections, and the thickness of the heat generating layer in some sections is different from the thickness of the heat generating layers in the other sections. In addition to the above-described components, the planar heating element 1 includes, for example, a power cord (not shown), an ON-OFF switch, a temperature sensor, and a control device that adjusts the temperature and time of heat generation.

  Here, the insulating sheet 11 can be made of, for example, synthetic resin (polyethylene terephthalate: plastic such as PET or polycarbonate), wood-based material, synthetic rubber, glass, ceramic, heat-resistant glass, minerals, or heat-resistant plastic.

  The heat generating layer 12 is preferably a conductive material such as a heat generating paint. For example, a mixture of plant raw material carbon, fine carbon, and the like, an organic binder, an inorganic binder, and the like is formed into a film shape to form a surface of the insulating sheet 11. Or is applied as a paint to the surface of the insulating sheet. With such a configuration, a thin and lightweight planar heating element can be formed, so that a display area for a product having a height can be further secured. Moreover, since it is easy to carry and rarely breaks down due to an impact, it can be easily provided on an existing display shelf. Furthermore, power consumption can be reduced.

  The electrode 13 is formed by laminating thin foils such as silver or copper, or a paint mixed with these metal powders on the surfaces of both right and left ends of the heat generating layer 12, and a power source (not shown) Connect and energize this heating layer.

  The surfaces of the heat generating layer 12 and the electrode 13 are coated with a water-resistant insulating resin (not shown) in order to ensure insulation and durability. The planar heating element 1 may have a waterproof function by a sandwich structure with a synthetic resin sheet or the like. Furthermore, the planar heating element 1 is not limited to these materials, and may be any material that can realize a planar shape. The size of the sheet heating element 1 is not limited. For example, the sheet heating element 1 may be any one having a large size (such as 1000 mm × 2000 mm) or a small size (such as 300 mm × 750 mm). One planar heating element 1 may be formed. Further, the thickness of the sheet heating element 1 formed by laminating the insulating sheet 11, the heat generating layer 12, the electrode 13, and a heat-resistant insulating film or a synthetic resin sheet (not shown) is about 20 μm to 80 μm, and is limited to dimensions. No, but very thin.

  Display shelves will be installed at convenience stores. In addition, you may install in the place which sells food and drinks, such as a supermarket, a department store, a department store, a bento shop, a side dish shop, and a drug store. There are no limitations on the dimensions and structure of these display shelves. The product is an aluminum can beverage. In addition, snacks such as steel can drinks, plastic bottle drinks, paper pack drinks and bottle drinks, fried potatoes, fried chicken, fried chicken, sausages and takoyaki, and other side dishes may be used.

  Hereinafter, regarding the plurality of compartments of the heat generating layer 12 and the thickness of the heat generating layer, the configuration when the heating tool provided with the planar heating element 1 is provided on the display shelf whose front surface is opened is particularly described. Will be explained.

  The plurality of sections in this case have a central portion 12a of the heat generating layer 12 and a peripheral portion surrounding the central portion, and the peripheral portion includes a front peripheral portion 12b positioned on the front side of the central portion, The rear peripheral portion 12c is located on the rear side of the central portion, the right peripheral portion 12d is located on the right side of the central portion, and the left peripheral portion 12e is located on the left side of the central portion.

  Here, the central portion 12a is located at the center of the display shelf, and since the heat is generated in the center, the temperature of the product tends to rise easily and becomes too hot. Further, the front peripheral portion 12b is closest to the opening on the front surface of the display shelf and easily touches the outside air to take heat away, so that the temperature of the product is difficult to rise and tends to be cooled. Further, the rear peripheral portion 12c is closest to the rear surface of the display shelf and is close to the outside, but because it is at the back of the display shelf, heat does not escape and the temperature of the product tends to rise easily and becomes hot. Further, the right peripheral portion 12d and the left peripheral portion 12e are closest to the right and left sides of the display shelf and are not only close to the outside but also enter the outside air from the opening. It is difficult to go up and tend to cool down.

  FIG. 2 shows a cross section AA of the planar heating element 1 shown in FIG. Further, FIG. 3 shows a cross section BB of the planar heating element 1 shown in FIG. As shown in FIG. 2 and FIG. 3, the front peripheral portion 12b and the right peripheral portion 12d are based on the heating characteristics such as the easiness of the temperature rise and the difficulty of elevating the temperature of the product mounted in each display shelf section. And the left peripheral portion 12e, the rear peripheral portion 12c, and the central portion 12a are made thicker in this order. The current from the electrodes 13 provided at both ends flows through the sections having different thicknesses, so that the temperature of the heat radiation in each section is different. With this structure, the thicker the layer, the larger the volume of heat generated, and thus the higher the temperature of heat dissipation.

  Here, Table 1 shows the test results of the heat radiation temperature of the heat generating layer 12 whose thickness is increased in the above order.

Temperature [1]: Front peripheral portion 12b, right peripheral portion 12d, and left peripheral portion 12e
Temperature [2]: Rear peripheral portion 12c
Temperature [3]: Central portion 12a
As is clear from the test results, it can be seen that the temperature of heat release varies depending on the thickness of the heat generating layer. That is, 5 minutes after the start of the test, the peripheral portion such as the front peripheral portion 12b where the temperature [1] is measured is 65 ° C., the temperature [2] is measured, the rear peripheral portion 12c is 40 ° C. and the temperature [3] is measured. The central portion 12a is 36 ° C., and this difference in heat radiation temperature lasts for 30 minutes until the end of the test. In addition, peripheral portions such as the front peripheral portion 12b rose 55 ° C. in 5 minutes from 20 minutes (95 ° C.) to 25 minutes (140 ° C.), and more than any test time zone of the central portion 12a and the rear peripheral portion 12c. High temperature rise rate. Therefore, the temperature of the product mounted on the peripheral portion such as the front peripheral portion 12b is most likely to rise, and if the thickness of the heat generating layer is adjusted, for example, the temperature of the product mounted on the central portion 12a and the rear peripheral portion 12c It was confirmed that it was difficult to go up.

  In addition, the method of making the thickness of the heat generating layer in some sections different from the thickness of the other heat generating layers can be easily achieved by using, for example, a manufacturing method in which the heat generating layer is overcoated or a manufacturing method in which the heat generating layer manufactured separately is used. The heat generating layer 12 can be formed.

  Next, the other structure of a heating tool is demonstrated using FIGS. Only parts different from the contents described with reference to FIGS. 1 to 3 will be described.

  The planar heating element 101 shown in FIGS. 4, 5, and 6 is obtained by providing the heating layer in a striped pattern at the central portion 112 a of the heating layer 112. Thereby, while preventing that a heat | fever goes to the center part 112a, the heat radiation temperature of this center part can be raised, and it can make it easy to raise the temperature of goods.

  Next, still another configuration of the heating tool will be described with reference to FIGS. 7 and 8. Only parts different from the contents described with reference to FIGS. 1 to 6 will be described.

  As shown in FIG. 7, in the planar heating element 201, the heat generation layers in the plurality of sections are isolated from each other, and the electrodes 213a to 213e are arranged at the right end of the right peripheral portion 212d and the left side of the left peripheral portion 212e. Instead of the ends, they are respectively provided at both ends of the heat generating layer in the plurality of sections.

  The heat generating layers in the plurality of sections are insulated from each other by providing a gap so that the heat generating layers in each section do not contact each other or by separating the heat generating layers with an insulating material. Specifically, as shown in FIG. 8, the heat generating layer is not in contact with the central portion 212a and the rear peripheral portion 212c and the right peripheral portion 212d of the heat generating layer, and the central portion and the rear peripheral portion and the left peripheral portion 212e. A gap is provided.

  Next, still another configuration of the heating tool will be described with reference to FIGS. 9 to 11. Only parts different from those described with reference to FIGS. 1 to 8 will be described.

  As shown in FIGS. 9 and 10, the heat generating layer 312 in the planar heating element 301 provided in the heating tool has a plurality of sections, and the surfaces of the central portion 312 a and the rear peripheral portion 312 c which are some sections. Are provided with heat insulating layers 314a and 314c, respectively.

  Here, the heat insulating layers 314a and 314c have a thermal conductivity such as a ceramic foil mainly composed of a heat reflecting material such as a metal foil such as aluminum, a compound such as silicon, zinc, titanium, or lanthanum, or a composite thereof. Insulating paints that are not only low but also have high heat reflectivity are good. By using these, the planar heating element 301 can be kept thin, and the temperature of heat radiation can be adjusted by changing its thickness.

  Therefore, as shown in FIG. 11, a heat insulating layer is provided on the surfaces of the central portion 312a and the rear peripheral portion 312c where heat is easily generated, and the heat insulating layer 314a provided in the central portion is thicker than the heat insulating layer 314c provided in the rear peripheral portion. To do. Thereby, the heat radiation from the thicker heat insulating layer 314a can be further suppressed.

  Next, the effect | action of the heating tool of the goods mounted in the display shelf is demonstrated using FIG.

This heating tool heats the displayed can beverage by the heat generated by the sheet heating element 401 laid on a display shelf having a front surface, a rear surface, a right side surface, and a left side surface. This planar heating element
What was demonstrated in FIGS. 1-3 is used.

  As a result, the front peripheral portion 412b, the right peripheral portion 412d, and the left peripheral portion 412e have a high heat radiation temperature of the heat generating layer, and the temperature of the can beverage can easily rise even under the influence of outside air, etc. You can get canned beverages at the right temperature.

  In addition, the rear peripheral portion 412b has a balance between the heat inside the display shelf and the outside air temperature in the vicinity of the display shelf while suppressing the heat radiation temperature of the heat generating layer. You can get canned beverages that have reached the temperature.

  On the other hand, the central portion 412a is likely to generate heat due to heat radiated from the peripheral portion, but since the heat radiating temperature of the heat generating layer is low, the temperature of the can beverage is difficult to rise and is not too hot. You can get a canned beverage.

  In this way, by changing the thickness of the heat generating layer 412 of the planar heat generating element 401, the temperature of heat radiation from each section can be changed. Therefore, if the thickness of the heat generating layer in the plurality of compartments is determined based on the easiness of the rise of the temperature of the canned beverages mounted on the display shelf, the temperature of all the canned beverages can be made uniform. . Thereby, a purchaser can obtain a can drink at the temperature which is easy to eat and drink irrespective of a mounting position.

  The product heating device mounted on the display shelf according to the present invention is thin and lightweight and easy to install. For example, only retailers and wholesalers who are worth taking advantage of the temperature difference of heat dissipation in some sections First, it can be widely used in industries related to industries such as cultivation of crops and plants, and breeding of animals and insects.

1, 101, 201, 301, 401 Planar heating element 11, 111, 211, 311, 411 Insulating sheet 12, 112, 212, 312, 412 Heat generation layer 12a, 112a, 212a, 312a, 412a Central portion 12b, 112b, 212b, 312b, 412b Front peripheral portion 12c, 112c, 212c, 312c, 412c Rear peripheral portion 12d, 112d, 212d, 312d, 412d Right peripheral portion 12e, 112e, 212e, 312e, 412e Left peripheral portion 13, 113, 213a 213e, 313, 413 electrode 314a, 314c heat insulation layer

Claims (5)

It has a sheet heating element laid on the display shelf,
The planar heating element has an insulating sheet, a heating layer provided on the surface of the insulating sheet, and electrodes provided on both ends of the heating layer,
The heating layer has a plurality of compartments,
The heating tool for a product mounted on a display shelf, wherein the thickness of the heat generating layer in some of the compartments is different from the thickness of the heat generating layer in the other compartments. The display shelf has an open front,
The plurality of sections have a central portion and a peripheral portion surrounding the central portion,
The peripheral portion includes a front peripheral portion located on the front side of the central portion, a rear peripheral portion located on the rear side of the central portion, a right peripheral portion located on the right side of the central portion, and a It consists of the left side peripheral part located on the left side,
The thickness of the heat generating layer is increased in the order of the front peripheral portion, the right peripheral portion and the left peripheral portion, the rear peripheral portion, and the central portion in this order.
The said electrode is provided in the right end of the said right peripheral part, and the left end of the left peripheral part, respectively. The heating tool of the goods mounted in the display shelf of Claim 1 characterized by the above-mentioned. The heat generating layers in the plurality of compartments are insulated from each other,
3. The electrode according to claim 1, wherein the electrodes are respectively provided at both ends of the heat generating layer in the plurality of sections instead of the right end of the right peripheral portion and the left end of the left peripheral portion. Product heating equipment mounted on the display shelf. It has a sheet heating element laid on the display shelf,
The planar heating element has an insulating sheet, a heating layer provided on the surface of the insulating sheet, and electrodes provided on both ends of the heating layer,
The heating layer has a plurality of compartments,
A heating tool for products mounted on a display shelf, wherein a heat insulating layer is provided on a surface of the heat generation layer in some of the compartments. The said heating layer is what apply | coated the electroconductive substance. The heating tool of the goods mounted in the display shelf in any one of Claim 1 thru | or 4 characterized by the above-mentioned.

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