CN2236275Y - Lunchbox with electric heating membrane - Google Patents
Lunchbox with electric heating membrane Download PDFInfo
- Publication number
- CN2236275Y CN2236275Y CN 95243636 CN95243636U CN2236275Y CN 2236275 Y CN2236275 Y CN 2236275Y CN 95243636 CN95243636 CN 95243636 CN 95243636 U CN95243636 U CN 95243636U CN 2236275 Y CN2236275 Y CN 2236275Y
- Authority
- CN
- China
- Prior art keywords
- lunch box
- heating film
- electric heating
- heat
- conducting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Packages (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
Abstract
The utility model relates to a thermal insulating lunch box heated by an electric heating film, belonging to a food heating device. The thermal insulating lunch box heated by an electric heating film comprises the outer case of the lunch box, a thermal insulating cover, a thermal insulating interlayer, an electric heating plug socket, and the inner container of the lunch box. The thermal insulating lunch box heated by an electric heating film is characterized in that the electric heating film and a heat conducting plate are arranged between the inner container and the thermal insulating interlayer, and the inner container of the lunch box, the heat conducting plate, and the heating element of the electric heating film are in surface contact mutually. The thermal insulating lunch box heated by an electric heating film has the advantages of high thermal efficiency, energy saving, long service life, safety, etc.
Description
The utility model Electric radiant Heating Film heat tracing lunch box belongs to foods heat unit, is particularly suitable for driver, traveller and other mobile staff and uses.
Along with the continuous growth of automobile quantity, driver and appliance crew wish and can have a dinner easily in the way of travelling, need the heat tracing lunch box that can use automobile power source.Chinese patent 91215565.5 (Granted publication CN 2060247Y), 93214958.8 (Granted publication CN2153299Y) and 93217315.2 (Granted publication CN2160247Y) discloses multiple electrical heat tracing lunch box, the heating material of use is respectively PTC pottery, DER microelectronics exothermic material and heating wire.These thermo electric materials all have some intrinsic shortcomings, if any heating complexity, cost height, the complex structure that has, also low, life-span of some efficient is short etc.
The purpose of this utility model is a kind of electric heating thermal insulation lunch box of design, its uses the Electric radiant Heating Film that can directly contact with conducting strip and lunch box realization face as heating, make the electric heating thermal insulation lunch box have simple in structure, the thermal efficiency is high, the life-span is long, the characteristics of good heat insulating.
The utility model comprise lunch box shell, insulation cover, insulation interlayer, be installed in supply socket and lunch box inner bag on the shell, it is characterized in that between inner bag and the insulation interlayer Electric radiant Heating Film and heat-conducting plate being arranged, be the face contact between Electric radiant Heating Film and heat-conducting plate, heat-conducting plate and the lunch box inner bag mutually.
Electric radiant Heating Film and heat-conducting plate can only place lunch box inner bag bottom, in order to improve the heat tracing effect, also can be equipped with Electric radiant Heating Film and heat-conducting plate in lunch box inner bag bottom and side.
The inner bag of the utility model Electric radiant Heating Film lunch box is made with aluminium or stainless steel, and shell and insulation cover use plastic monoblock injection molded respectively.Electric radiant Heating Film is to be clipped in two layers of metal forming between the dielectric film, and metal forming is made the resistive element of certain resistance value by designing requirement.Common metal foil material can be aluminium, constantan or other copper alloy, nickel alloy, stainless steel etc.Insulating film material can be thin-film materials such as mica, glass fibre, silicon rubber, polyester or polyimides.Heat-conducting plate can be copper coin, aluminium sheet etc., selects first-selected aluminium sheet from price and heat conductivility.
The utility model is owing to adopted electrothermic film element as exothermic material, and with heat-conducting plate and lunch box bottom (comprising the side) directly realization face contact, has thermal conductive surface to greatest extent, reduced the conduction loss of heat, the electrothermic film element adstante febre does not produce the red bright naked light that waits, radiation loss is also very little, therefore, the utlity model has thermal efficiency height, advantages such as energy savings, because the metal film exothermic material is enclosed in the insulating barrier, not oxidated and other chemical substance corrosion does not have naked light again, therefore, long service life, not fragile, safe and reliable.
Fig. 1 is the sectional view of an embodiment of the utility model, and present embodiment only is provided with heating element heater in the lunch box bottom.1 is the lunch box insulation cover among the figure, the 2nd, and the lunch box inner bag, the 3rd, the insulation interlayer, 4 are supply socket, the 5th, Electric radiant Heating Film, the 6th, heat-conducting plate (present embodiment is an aluminium sheet), the 7th, shell.
Present embodiment uses 12V power supply, power 40W.Can use the automobile cigarette lighter power supply by the power source special line, also can be by transformer by mains-supplied.Test result shows that the utility model is after heating half an hour, and 26 ℃ of temperature rises were heated one hour, and temperature rise reaches 47 ℃.Insulation is 2 hours after heating up one hour, and temperature only reduces by 15 ℃, and these performances are better than using at present the commercially available prod of other heating material, is particularly suitable for the driver and uses.
Claims (4)
1. Electric radiant Heating Film heat tracing lunch box, the shell (7), insulation cover (1), the insulation interlayer (3) that comprise lunch box, be installed in supply socket (4) and lunch box inner bag (2) on the shell, of the present utility model being characterised in that between inner bag (2) and insulation interlayer (3) has Electric radiant Heating Film (5) and heat-conducting plate (6), is face mutually between heat-conducting plate (6) and lunch box inner bag (2), Electric radiant Heating Film (5) and the heat-conducting plate (6) and contacts.
2, by the described heat tracing lunch box of claim 1, it is characterized in that Electric radiant Heating Film (5) and heat-conducting plate (6) place lunch box inner bag (2) bottom.
3. by claim 1 a fast heat tracing lunch box, it is characterized in that Electric radiant Heating Film (5) and heat-conducting plate (6) place lunch box inner bag (2) bottom and side.
4. by claim 1,2 described heat tracing lunch boxes, it is characterized in that said heat-conducting plate (6) is an aluminium sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95243636 CN2236275Y (en) | 1995-03-24 | 1995-03-24 | Lunchbox with electric heating membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95243636 CN2236275Y (en) | 1995-03-24 | 1995-03-24 | Lunchbox with electric heating membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2236275Y true CN2236275Y (en) | 1996-10-02 |
Family
ID=33884194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95243636 Expired - Fee Related CN2236275Y (en) | 1995-03-24 | 1995-03-24 | Lunchbox with electric heating membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2236275Y (en) |
-
1995
- 1995-03-24 CN CN 95243636 patent/CN2236275Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |