JP2006046441A - Heat insulating cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating cover suitable for heat retaining equipment such as a rice cooker or an electric water heater. <P>SOLUTION: The heat insulating cover comprises a cover body 1 for covering at least part of a heat retained object (the rice cooker) 4 and an infrared reflecting sheet 2 of high infrared reflectivity provided on the inner or outer face of the cover body 1. When applied to the heat retaining equipment such as the rice cooker or the electric water heater, it increases the heat retaining performance of the heat retaining equipment and reduces the energy consumption. A through-hole 3 is provided in the heat insulating cover to suppress internal stuffiness or abnormal high temperature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat insulating cover for the purpose of improving heat retention in devices that require heat insulation such as rice cookers, electric water heaters, beverage bottles and cooking pots.

  Conventionally, this type of heat insulating cover is one in which an aluminum vapor deposition layer is provided on the inner surface of the heat insulating cover for the purpose of keeping the PET bottle cold (see, for example, Patent Document 1).

  FIG. 10 shows a conventional heat insulating cover described in Patent Document 1. In FIG. As shown in FIG. 10, the cold storage bag is composed of a bag-shaped portion 3 and a bent cover portion 5, and the bag-shaped portion 3 is composed of a front sheet 19 and a rear sheet 21 having a plurality of laminated structures. The front sheet 19 includes an aluminum vapor deposition layer.

When a low temperature plastic bottle is inserted into the bag, it is insulated by the laminated structure of the bag-like portion, and the temperature inside the plastic bottle is kept low.
JP 7-215375 A

  However, in the above-described conventional configuration, the infrared reflectance of the aluminum vapor deposition layer installed on the inner surface of the heat insulating cover is insufficient, or most of the infrared radiation is absorbed by the protective layer film on the aluminum vapor deposition layer. Therefore, the heat retention effect by infrared reflection was not sufficient.

  In addition, when used during operation of a heat retaining device that has a steam hole such as a rice cooker or an electric water heater and discharges high-temperature steam from the steam hole, the water vapor adheres as water droplets inside the heat insulating cover, and the inside It could not be applied because it became extremely hot and there was a risk of resin deformation or fire in the case of the heat insulation device.

  In addition, when these devices have a lid and a body, the lid cannot be opened and closed when the heat insulating cover is applied. Therefore, it is necessary to attach and detach the heat insulating cover from the device every time the lid is opened and closed. Was.

  The present invention solves the above-described conventional problems, and has an object of providing a heat insulating cover that has good heat retention, can be applied during operation of a heat retaining device such as a rice cooker or an electric water heater, and is easy to use. And

  In order to solve the above-described conventional problems, the heat insulating cover of the present invention is provided with an infrared reflecting sheet having an infrared reflectance of 50% or more on the inner surface or outer surface of the covering that covers the object to be heated.

  As a result, heat transfer by radiation from the heat retaining device to the outside can be significantly reduced as compared with the conventional case, so that the heat retaining property can be improved and the energy consumption of the heat retaining device can be reduced as compared with the conventional heat retaining device.

  In addition, the heat insulating cover of the present invention is provided with a through hole in at least a part thereof, whereby a steam passage when applied to a heat retaining device having a steam hole can be formed. An abnormally high temperature can be suppressed, and a heat insulating cover can be applied even during operation of the heat retaining device.

  In addition, the heat insulating cover of the present invention is provided with an opening that can be freely opened and closed, so that the lid of the heat retaining device can be opened and closed while the heat insulating cover is applied, so that the usability can be improved. .

  The heat insulating cover of the present invention is an application of an infrared reflecting sheet having a high infrared reflectance on the inner surface or outer surface of the covering, and when applied to a heat retaining device such as a rice cooker or an electric water heater, the heat retaining property of the heat retaining device. And the amount of energy consumption can be reduced.

  Moreover, by providing the through hole in the heat insulating cover, it is possible to suppress internal steaming and abnormally high temperature.

  Further, by providing the heat insulating cover with an opening that can be opened and closed, the lid of the heat retaining device can be opened and closed while the heat insulating cover is worn, so that a heat insulating cover that is easy to use can be provided.

  The invention of the heat insulating cover according to claim 1 is a covering body that covers at least a part of the object to be insulated, and an infrared reflecting sheet having an infrared reflectance of 50% or more provided on at least a part of the inner surface of the covering body. The heat transfer due to radiation from the object to be warmed to the outside is reduced, thereby increasing the heat retaining property of the object to be warmed and reducing the energy consumption required for the heat retaining. In addition, by covering with a heat insulating cover, it is possible to reduce the adhesion of dirt to the object to be warmed, and the heat insulating cover can be made of a fabric having a color and a pattern according to the user's preference, so that interior characteristics Can be improved.

  The invention of the heat insulating cover according to claim 2 is a covering for covering at least a part of the object to be insulated, and an infrared reflecting sheet having an infrared reflectance of 50% or more provided on at least a part of the outer surface of the covering. The heat transfer due to radiation from the outside to the object to be warmed is reduced, whereby the inflow of heat to the object to be warmed can be reduced, and the amount of energy consumed for the warming can be reduced.

  The invention of the heat insulation cover according to claim 3 has a through-hole in at least a part of the heat insulation cover of the invention according to claim 1 or 2, whereby the heat-insulated object has a steam discharge port or the like. In this case, it acts as a steam hole from the inside of the heat insulating cover to the outside, so that it can prevent the steam inside the heat insulating cover due to the accumulation of steam and the adverse effect on the warm object due to abnormally high temperature inside the heat insulating cover. it can.

  According to a fourth aspect of the present invention, the infrared reflective sheet of the invention according to any one of the first to third aspects has a metal foil or a metal vapor-deposited layer. It has high reflectivity and can reduce heat transfer due to radiation from the object to be heated to the outside, or heat transfer due to radiation from the outside to the object to be warmed, so the amount of energy required to keep the object to be warmed Can be reduced.

  The invention of the heat insulating cover according to claim 5 is a laminate structure in which the infrared reflecting sheet according to any one of claims 1 to 4 has an infrared transmitting layer on a metal foil and a metal vapor-deposited layer. As a result, it is possible to suppress oxidation, tearing, scratches, etc. of the infrared reflecting layer without hindering the reflectivity of the infrared reflecting sheet. The reliability over time of the heat insulating property can be improved.

  In the invention of the heat insulating cover according to claim 6, the infrared reflecting sheet of the invention according to any one of claims 1 to 5 is detachable from the covering, whereby the infrared reflecting sheet is remarkably provided. When it becomes dirty, the infrared reflecting sheet can be replaced, so that the heat insulating cover can be kept clean.

  The invention of the heat insulation cover according to claim 7 comprises a covering that covers at least a part of the object to be heated, and has a through hole in at least a part of the covering, and convection leaks from the object to be heated. Since the heat transfer due to can be reduced, it is possible to increase the heat retaining property of the object to be warmed and reduce the amount of energy consumption. In addition, when the heat-insulated material is a device having a steam outlet or the like by having a through-hole, it functions as a steam hole from the inside of the heat insulating cover to the outside. It is possible to prevent an adverse effect on the object to be heated due to abnormally high temperature inside the cover. In addition, the invention described in claim 7 includes that in which at least a part of the covering is provided with a sheet that does not particularly define the reflectance.

  In the invention of the heat insulation cover according to claim 8, the covering body according to any one of claims 1 to 7 has an opening that can be freely opened and closed, whereby the lid body and the body are separated. When applying a heat insulation cover to the equipment which has, since the lid | cover of a heat retention apparatus can be opened and closed with wearing a heat insulation cover, the usability of a heat insulation cover improves.

  In the invention of the heat insulating cover according to claim 9, the outermost layer of the covering according to the invention according to any one of claims 1 to 8 is made of a material having water resistance. Etc. can be easily removed by wiping with water or the like, and the heat insulating cover can be kept clean.

  The invention of the heat insulating cover described in claim 10 is that the covering in the invention described in claim 6 or 7 is made of a material that can be washed with water. Since only the body part can be washed with water, the heat insulating cover can be kept clean.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a heat insulating cover applied to rice cooker 4 in Embodiment 1 of the present invention.

  In FIG. 1, a cover 1 covers the top and side surfaces of a rice cooker 4 that is an object to be heated, and an infrared reflection sheet 2 having an infrared reflectance of 50% or more is installed on the inner surface of the cover 1. ing. Moreover, the steam hole 5 exists in the top | upper surface of the rice cooker 4 which is a to-be-heated material, and the through-hole 3 is provided in the heat insulation cover part which covers the upper direction so as to correspond to the steam hole 5. FIG.

  FIG. 2 is a cross-sectional view of the infrared reflecting sheet 2 of the heat insulating cover according to Embodiment 1 of the present invention. The infrared reflection sheet 2 is a film in which an infrared transmission layer 7 is laminated on the upper layer, an infrared reflection layer 8 is laminated on the middle layer, and a protective layer 9 is laminated on the lower layer, and laminated with an adhesive 10.

  FIG. 3 is a plan view showing the inner surface of the heat insulating cover according to Embodiment 1 of the present invention. In FIG. 3, the inner surface of the covering 1 has a folded covering gusset portion 11 and a fastener 12 stitched to the covering gusset portion 11. Both ends of the fastener 12 are stitched to the covering gusset portion 11, and the infrared reflecting sheet 2 is inserted and fixed between the fastener 12 and the inner surface of the covering 1.

  About the heat insulation cover comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The heat insulating cover of Embodiment 1 of the present invention has a shape that covers the top and side surfaces of the rice cooker 4, and is used by covering the top of the rice cooker. It does not matter.

  By covering the rice cooker 4 with the covering 1, heat transfer by air convection from the rice cooker 4 housing to the outside can be reduced, and the infrared reflecting sheet 2 installed on the inner surface of the covering 1 makes the rice cooker 4 Since most of the radiation from the body can be reflected, radiation heat transfer can be reduced. Thereby, the thermal radiation amount of the rice cooker 4 can reduce, and the energy consumption required at the time of heat insulation can be reduced.

  During rice cooking, a large amount of water vapor is released by the steam holes 5 present on the top surface of the rice cooker 4, but since the through holes 3 serve as ventilation holes, water vapor does not accumulate inside the heat insulating cover. Resin deformation caused by stuffiness or abnormally high temperature inside the cover can be suppressed. Therefore, by providing the through hole 3 in the heat insulating cover, the heat insulating cover can be applied during operation of a device having a mechanism for discharging steam, such as a rice cooker 4 or an electric water heater.

  In addition, the rice cooker 4 is usually installed in a kitchen, but in the kitchen, there is a lot of oil splashing during cooking, so the mixed surface of the rice cooker 4 is contaminated with dust and oil. It was easy to remove easily by wiping with water. When the heat insulation cover of this invention is applied to the rice cooker 4, since adhesion of the stain | pollution | contamination to the rice cooker 4 can be prevented, while being hygienic, it can save the effort of cleaning.

  In addition, since the heat insulating cover can be made of a fabric having a color and a pattern that matches the user's preference, personal satisfaction is enhanced and interior properties can be improved.

  The covering 1 covers at least a part of the object to be warmed, and its installation method is in close contact with the object to be warmed or has some space, but is not particularly defined. As a material of the covering body 1, when a waterproof material is used, it can be removed by wiping when dirt is attached, which is preferable in terms of hygiene and improves cleaning properties. Polyvinyl chloride sheets and polyethylene sheets are suitable as the material, but any material that has heat resistance and water resistance in the operating temperature range and that can be easily molded is required. is not.

  In addition, when a material that can be washed with water is used as the material of the covering 1, the dirt can be easily removed by hand washing or washing with an electric washing machine when the dirt adheres, which is preferable in terms of hygiene. The material that can be washed with water is preferably a non-woven fabric or a fabric, or a laminate thereof, and any of organic materials and inorganic materials can be used as long as they have heat resistance in the operating temperature range. Especially, when the material which gave the quilting process and laminated | stacked the fabric and the nonwoven fabric is used, since a more favorable heat retention effect is acquired by the air heat insulation effect inside a nonwoven fabric, it is preferable as a raw material of the coating body 1. FIG.

  As a method of installing the infrared reflecting sheet on the covering 1, for example, a plurality of fasteners 12 made of a stretchable material such as rubber are stitched with the covering gusset portion 11 at several locations inside the covering. There is a method of installing and fixing by sandwiching an infrared reflecting sheet between the fastener 12 and the inner surface of the covering 1.

  In addition, the infrared reflecting sheet 2 may be bonded to the covering body 1 with a polyethylene double-sided tape or the like, or quilted with the covering body, and the covering body 1 and the infrared reflecting sheet 2 are provided with a hook and bonded. Not particularly specified.

  Examples 1 to 3 show the results obtained by changing the infrared reflectance of the infrared reflective sheet 2 and measuring the power consumption of the rice cooker 4 and the thermal conductivity of the housing surface. The case where the heat insulating cover (Example 1) in which the infrared reflectance of the infrared reflecting sheet 2 was 50% was applied to the rice cooker 4 was evaluated. Moreover, the covering 1 used the raw material which pinched both sides of the cotton nonwoven fabric of thickness 5mm with the cotton fabric of thickness 1mm, and gave the quilting process.

  Electricity consumption evaluation of rice cooker is the electricity consumption when we put 5 rice and water suitable for it in the room at 25 degrees Celsius, and keep at 75 degrees Celsius heat setting for 12 hours after the end of rice cooking Was measured with an integrating wattmeter. Table 1 shows the power consumption when the rice cooker 4 alone (Comparative Example 1) and the heat insulating cover are applied to the rice cooker 4. The result of measuring the power consumption of the rice cooker 4 of the rice cooker 4 alone (Comparative Example 1) was 438W.

熱貫流率の測定は、熱流センサーを炊飯器の蓋と、蓋と胴の継ぎ目である開口部６と、胴のそれぞれ数箇所へ等間隔に設置し、得られた熱流値に炊飯器４の内部温度と表面温度との差の逆数を乗じて、各部分における熱貫流率とした。測定点1〜２は蓋、測定点３〜５は開口部６周囲、測定点６〜９は胴部へそれぞれ設置した。断熱カバーを設置した（実施例１）については、熱流センサーを直接断熱カバーの被覆体１の外側に設置した。炊飯器４単体（比較例１）と、炊飯器４に断熱カバーを適用した場合の熱貫流率を図４に示す。炊飯器４単体（比較例１）の熱貫流率の値より、炊飯器４の熱漏洩は蓋と胴の継ぎ目である開口部６において最も大きく、その最大値は１３Ｗ／ｍ²Kであった。

The measurement of the heat transmissivity is carried out by installing a heat flow sensor at an equal interval to the lid of the rice cooker, the opening 6 that is the joint between the lid and the drum, and several locations on the drum, and the obtained heat flow value of the rice cooker 4 is measured. By multiplying the reciprocal of the difference between the internal temperature and the surface temperature, the heat transmissivity in each part was obtained. The measuring points 1 and 2 were installed on the lid, the measuring points 3 to 5 were installed around the opening 6, and the measuring points 6 to 9 were installed on the trunk. About the heat insulation sensor (Example 1) which installed the heat insulation cover, the heat flow sensor was installed in the outer side of the coating body 1 of the heat insulation cover directly. FIG. 4 shows the thermal conductivity when the heat insulating cover is applied to the rice cooker 4 alone (Comparative Example 1) and the rice cooker 4. From the value of the heat transmissivity of the rice cooker 4 alone (Comparative Example 1), the heat leakage of the rice cooker 4 is the largest at the opening 6 which is the joint between the lid and the trunk, and the maximum value is 13 W / m ² K. .

Example 1
A film having an infrared reflectance of 50% was used as the infrared reflecting sheet 2. The infrared reflective sheet 2 was formed by sequentially laminating a 20 μm ETFE film as the infrared transmissive layer 7, a 12 μm aluminum foil as the infrared reflective layer 8, and a 20 μm nylon film as the protective layer 9. Is.

  The power consumption of the rice cooker 4 was 305 W, which was 30% lower than that of Comparative Example 1. The heat flow rate was reduced by 80% at the maximum in comparison with the comparative example 1 particularly in the opening 6.

  Since the heat transfer by the convection from the rice cooker 4 can be reduced by applying the covering 1, the heat retaining property of the rice cooker 4 is improved, and the amount of energy consumption can be reduced. Moreover, since the effect of reducing radiation can be obtained by applying a film having an infrared reflectance of 50%, the heat retention of the rice cooker 4 can be improved, and the amount of energy consumed can be reduced.

  As the infrared reflecting sheet 2 having an infrared reflectance of 50% or more, for example, a laminate structure having at least a three-layer structure is formed.

  For example, an ETFE film, an FEP film, a PFA film, a PPS film, or the like can be applied to the infrared transmission layer 7, and a material having an infrared transmission factor of 25% or more is preferable although not particularly specified. By using a fluororesin film or a polyphenylene sulfide film having a low absorptance of 2 to 25 μm in the infrared wavelength region, infrared reflection at the infrared reflection layer 8 can be performed efficiently.

  The middle infrared reflective layer 8 is made of a metal foil or metal vapor-deposited layer having high infrared reflectivity, and gold, silver, barrel, aluminum, iron, nickel, etc. can be applied as the metal material, but it is particularly specified. It is not a thing. In general, aluminum foil is inexpensive and versatile.

  The lower protective layer 9 can be applied regardless of an organic film or an inorganic film such as a nylon film, a polyethylene terephthalate film, or a polyethylene naphthalate film. Moreover, when the infrared reflective layer 8 consists of a metal vapor deposition layer, the protective layer 9 can become a base material at the time of vapor deposition.

  Most of the radiation applied to the infrared reflecting sheet 2 is transmitted by the infrared transmitting layer 7, and most of the radiation is reflected by the infrared reflecting layer 8, so that heat transfer by radiation can be efficiently reduced. it can. Further, since the protective layer 9 together with the infrared transmitting layer 7 has an effect of reducing oxidation deterioration, corrosion, tearing, scratches and the like of the metal foil and the metal vapor deposition layer, the infrared reflectivity can be continuously maintained.

(Comparative Example 1)
5 rice and an appropriate amount of water were put into the rice cooker 4, cooked in a room at 25 ° C., and the accumulated power for 12 hours during the heat insulation was measured. Moreover, when the heat transmissivity of the housing | casing of the rice cooker 4 was measured, the value of the heat transmissivity was notably large around the opening part 6, and the maximum value was 13 W / m < ² > K.

(Embodiment 2)
FIG. 5 is a cross-sectional view of a heat insulating cover applied to rice cooker 4 in Embodiment 2 of the present invention.

  In FIG. 5, the covering 1 covers the top and side surfaces of the rice cooker 4 that is the object to be kept warm, and the steam hole 5 exists on the top face of the rice cooker 4 that is the object to be kept warm. A through-hole 3 is provided in the covering 1 covering the surface. In addition, the heat insulation cover of Embodiment 2 includes a cover provided with a sheet that does not particularly define the reflectance in at least a part of the covering.

  The heat insulating cover of Embodiment 2 of the present invention has a shape that covers the top and side surfaces of the rice cooker 4, and is used by covering the top of the rice cooker. It does not matter.

  By covering the rice cooker 4 with the cover 1, heat transfer by air convection from the rice cooker 4 housing to the outside can be reduced. Thereby, the thermal radiation amount of the rice cooker 4 can reduce, and the energy consumption required at the time of heat insulation can be reduced.

  During rice cooking, a large amount of water vapor is released by the steam holes 5 present on the top surface of the rice cooker 4, but since the through holes 3 serve as ventilation holes, water vapor does not accumulate inside the heat insulating cover. Resin deformation caused by stuffiness or abnormally high temperature inside the cover can be suppressed. Therefore, by providing the through hole 3 in the heat insulating cover, the heat insulating cover can be applied during operation of a device having a mechanism for discharging steam, such as a rice cooker 4 or an electric water heater.

  In addition, the rice cooker 4 is usually installed in a kitchen, but in the kitchen, there is a lot of oil splashing during cooking, so the mixed surface of the rice cooker 4 is contaminated with dust and oil. It was easy to remove easily by wiping with water. When the heat insulation cover of this invention is applied to the rice cooker 4, since adhesion of the stain | pollution | contamination to the rice cooker 4 can be prevented, while being hygienic, it can save the effort of cleaning.

  In addition, since the heat insulating cover can be made of a fabric having a color and a pattern that matches the user's preference, personal satisfaction is enhanced and interior properties can be improved.

  Examples 2 to 3 show the results of measuring the power consumption of the rice cooker 4 and the heat transmissivity of the housing surface by changing the conditions of the heat insulating cover. When the heat insulation cover (Example 3) comprised only from the coating | covering body 1 and the heat insulation cover (Example 2) provided with the sheet | seat of 35% of infrared reflectance on the inner surface of the coating | coated body 1 are applied to the rice cooker 4, respectively. Was evaluated. Moreover, about the evaluation method and the material conditions of the coating | covering body 1, it carried out similarly to Example 1 in Embodiment 1, each power consumption was shown in (Table 1), and the heat transmissivity was shown in FIG.

(Example 2)
In Example 2, the coated body 1 having the through hole 3 was applied to the heat insulating cover that covers the rice cooker 4. The power consumption of the rice cooker 4 was 372 W, which was 15% lower than that of Comparative Example 1. The heat transmissivity of the opening 6 of the rice cooker 4 is slightly larger than that of Example 2 and is reduced by 60% at maximum from that of Comparative Example 1.

  Even when the coated body 1 is applied alone, heat transfer by convection from the rice cooker 4 can be reduced, so that the heat retention of the rice cooker 4 can be improved, the amount of energy consumption can be reduced, and infrared rays can be reduced. Cost can be reduced as compared with the case where the reflection sheet 2 is installed. The reason why the heat retention effect is improved only by the application of the cover 1 is considered to be that the heat insulation effect by covering the periphery of the opening 6 where heat leakage is large is large.

(Example 3)
A laminate film having an infrared reflectance of 35% was used on the inner surface of the cover 1. The Nate film in the column is obtained by laminating a 20 μm nylon film, a 12 μm aluminum foil serving as the infrared reflecting layer 8, and a 20 μm PET film serving as the protective layer 9 in this order, and laminating each layer with the adhesive 10. .

  The power consumption of the rice cooker 4 was 363 W, which was 17% lower than that of Comparative Example 1. Although the heat transmissivity of the rice cooker 4 was inferior to that of Example 1, it was reduced by 65% at maximum in the opening 6 from that of Comparative Example 1.

  Since the heat transfer by the convection from the rice cooker 4 can be reduced by applying the covering 1, the heat retaining property of the rice cooker 4 is improved, and the amount of energy consumption can be reduced. Moreover, since the reflection effect of radiation is obtained by applying a film having an infrared reflectance of 35%, the heat retention of the rice cooker 4 is improved, and the amount of energy consumption can be reduced.

  From the above, in order to obtain a significant radiation reflecting effect in the heat insulating cover, it is desirable to use the infrared reflecting sheet 2 having an infrared reflectance of 50% or more on the inner surface of the covering 1, but the infrared reflectance is 50. Even when, for example, a laminate film or a single layer film is used as a sheet of less than%, the heat transfer reduction effect due to convection from the rice cooker 4 can be obtained. Can be reduced.

  In addition, as the sheet having an infrared reflectance of less than 50%, an organic film or an inorganic film having a single layer or a laminated structure can be applied, and the material and the infrared reflectance are particularly defined as long as the sheet has heat resistance in the operating temperature range. is not.

(Embodiment 3)
FIG. 6 is a cross-sectional view of a heat insulating cover applied to the rice cooker 4 according to Embodiment 3 of the present invention.

  In FIG. 6, it is comprised from the heat insulation cover coating | cover 1 and the infrared reflective sheet 2. In FIG. By covering with this heat insulation cover when the rice cooker 4 is kept warm, the heat transfer by air convection and the heat transfer by radiation can be reduced, so the heat retention of the rice cooker 4 is improved and the amount of energy consumed. Can be reduced.

  Moreover, since it can prevent adhesion of dirt to the rice cooker 4 by covering the rice cooker 4 with the heat insulating cover of the present embodiment when the rice cooker 4 is stopped and kept warm, it is good in terms of hygiene. It is possible to save the trouble of cleaning.

(Embodiment 4)
FIG. 7 is a cross-sectional view of a heat insulating cover applied to the rice cooker 4 according to Embodiment 4 of the present invention.

  In FIG. 7, the covering body 2 having the infrared reflecting sheet 2 on the inner surface covers the periphery of the opening 6 that is the joint between the lid of the rice cooker 4 and the body, and the covering body 6 is elastic such as rubber. It is made of a combination of a material having a fabric and a non-woven fabric and is formed in a ring shape, and can be fitted and fixed around the opening 6 of the rice cooker, and can be easily attached and detached. Although the opening part 6 has the largest heat leak of the rice cooker 4, conventionally, it has been difficult to provide a heat insulating member inside the rice cooker. By covering the opening 6 with the heat insulating cover of the present embodiment, heat transfer due to air convection caused by heat leakage from the opening 6 and heat transfer due to radiation can be reduced. Can be improved, and the amount of energy consumption can be reduced.

(Embodiment 5)
FIG. 8 is a cross-sectional view of a heat insulating cover applied to a beverage-containing plastic bottle 13 according to Embodiment 5 of the present invention.

  In FIG. 8, a low-temperature beverage is enclosed in a beverage-containing plastic bottle 13 that is an object to be kept warm, and the covering 1 covers the bottom and side surfaces of the beverage-containing plastic bottle 13. An infrared reflection sheet 2 is installed on the outer surface of the cover 1. Even if the beverage-filled PET bottle 13 to which this heat insulating cover is applied is left in a place where the contribution of heat transfer by radiation is high, such as outdoors, the infrared reflecting sheet 2 installed on the outermost layer of the heat insulating cover increases the radiation. The part can be reflected. Therefore, by reducing the amount of heat flowing into the inside of the heat insulating cover, the beverage-containing PET bottle 13 that is a heat-retained object can be kept in a low temperature state.

(Embodiment 6)
FIG. 9 is a perspective view of a heat insulating cover applied to rice cooker 4 according to Embodiment 6 of the present invention.

  In FIG. 9, the heat insulation cover which coat | covers the rice cooker 4 is divided | segmented into the cover part 14 and the trunk | drum 15, and the heat insulation cover opening part 16 exists in the boundary. By providing the heat insulating cover opening 16, the lid 14 can be opened and closed. For the heat insulating cover opening 16, a fastener, a button, a simple fastener generally referred to as Velcro (registered trademark), or the like can be applied if a fastener is required when the lid 14 is closed. Not particularly specified.

  By providing this opening and closing mechanism, it is not necessary to remove the heat insulating cover by simultaneously opening and closing the cover 14 of the heat insulating cover when opening and closing the lid of the rice cooker 4, thereby saving labor and improving usability.

  In addition, it defines that the concept of heat insulation described in the present invention includes both the meanings of heat insulation and cold insulation. In addition, to-be-heated material refers to all devices that need to be kept warm, such as rice cookers, electric water heaters, plastic bottle containers and cooking pots.

  The heat insulating cover according to the present invention can be applied to a heat retaining device having a steam hole in addition to improving the heat retaining property of a normal heat retaining device, and the amount of energy consumption can be reduced. It can also be applied to.

Sectional drawing of the heat insulation cover applied to the rice cooker in Embodiment 1 of this invention Sectional drawing of the infrared reflective sheet in Embodiment 1 of this invention The top view which shows the heat insulation cover inner surface in Embodiment 1 of this invention Transition diagram of heat transmissivity in Examples 1 to 3 of Embodiment 1 or 2 of the present invention Sectional drawing of the heat insulation cover applied to the rice cooker in Embodiment 2 of this invention Sectional drawing of the heat insulation cover applied to the rice cooker in Embodiment 3 of this invention Sectional drawing of the heat insulation cover applied to the rice cooker in Embodiment 4 of this invention Sectional drawing of the heat insulation cover applied to the beverage containing plastic bottle in Embodiment 5 of this invention The perspective view of the heat insulation cover applied to the rice cooker in Embodiment 6 of this invention. Plan view showing the external structure of a conventional heat insulating cover

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Covering body 2 Infrared reflective sheet 3 Through-hole 4 Rice cooker 7 Infrared transmitting layer 8 Infrared reflecting layer 9 Protective layer 13 PET bottle with drink 14 Lid 15 Body 16 Heat insulation cover opening

Claims (10)

  A heat insulating cover comprising: a covering that covers at least a part of an object to be insulated; and an infrared reflecting sheet having an infrared reflectance of 50% or more provided on at least a part of the inner surface of the covering.   A heat insulating cover comprising: a covering that covers at least a part of an object to be insulated; and an infrared reflecting sheet having an infrared reflectance of 50% or more provided on at least a part of the outer surface of the covering.   The heat insulating cover according to claim 1 or 2, wherein at least a part thereof has a through hole.   4. The heat insulating cover according to claim 1, wherein the infrared reflecting sheet has a metal foil and a metal vapor-deposited layer.   The heat insulating cover according to any one of claims 1 to 4, wherein the infrared reflecting sheet is a laminate structure having an infrared transmitting layer on a metal foil or a metal vapor deposition layer.   The heat insulating cover according to any one of claims 1 to 5, wherein the infrared reflecting sheet is detachable from the cover.   A heat insulating cover comprising a covering for covering at least a part of the object to be insulated, and having a through hole in at least a part of the covering.   The heat insulating cover according to any one of claims 1 to 7, wherein the cover has an opening that can be freely opened and closed.   The heat insulation cover according to any one of claims 1 to 8, wherein the outermost layer of the covering is made of a water-resistant material.   The heat insulating cover according to claim 6 or 7, wherein the covering is made of a material that can be washed with water.

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