CN2268451Y

CN2268451Y - Thermal insulating lunchbox

Info

Publication number: CN2268451Y
Application number: CN 95241611
Authority: CN
Inventors: 曾进平
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-17
Filing date: 1995-05-17
Publication date: 1997-11-26
Anticipated expiration: 2005-05-17

Abstract

The utility model discloses a thermal insulating lunch box, which is composed of an outer casing (3) of a box body, a box cover (2), a thermal insulating layer (10), an object containing jar (4), a PTC electric heater (11), a handle (1), and a storage battery (13), wherein, the outer casing (3) of the box body is connected with the object containing jar (4) by a connecting ring (9); the thermal insulating layer (10) is arranged between the outer casing (3) of the box body and the object containing jar (4); the inner side of the box cover (2) is provided with an inner lining (7); the outer casing (3) of the box body is movably connected with the box cover (2), the handle (1), and the connecting ring (9); the PTC electric heater (11) is placed between the object containing jar (4) and the thermal insulating layer (10); the storage battery (13) is placed at the bottom of the lunch box. Because the thermal insulating lunch box adopts a PTC heating element, and has dual-purpose of a self-bringing power supply and an external power supply, the thermal insulating lunch box has the advantages of good thermal insulating effect and convenient carrying.

Description

Incubation canteen

The utility model relates to the incubation canteen of containing the food temperature in a kind of can the maintenance long period, especially carries out heated at constant temperature with the PTC heater element, and battery can be placed the incubation canteen in the box.

People often need carry foods such as a certain amount of meal, dish and go out to eat, thereby various types of lunch boxes occur in daily life.Common incubation canteen has glass vacuum flask to make storage cylinder or metal storage cylinder band heat-insulation layer etc.But because the frangible inconvenience of glass vacuum flask is carried, heat insulation effect is bad, and the insulating power of the appended heat-insulation layer of metal storage cylinder is poor, makes the heat-insulating property of lunch box greatly reduce.Particularly in the winter time with the alpine snowfield area, the heat insulation function of these incubation canteens is almost completely lost.

The purpose of this utility model provides a kind of incubation canteen of easy to use, high insulating effect.This lunch box not only has heat-insulation layer, and there is electric heater lunch box inside.Electric heater is by external power supply or place storage battery power supply in the box.

For achieving the above object, the technical solution adopted in the utility model is, incubation canteen is mainly by box body, lid, handle with place the storage cylinder in the box body to form.Box case is connected with connecting ring with the storage cylinder.Be heat-insulation layer between box case and the storage cylinder.There is lining the lid inboard.Box body and lid, handle and connecting ring are flexible connection.Between storage cylinder and heat-insulation layer, there is an energising rear surface temperature to be not more than 200 ℃ PTC electric heater.Lid and liner, box case handle, connecting ring are made of plastics or metal, and heat-insulation layer is made of heat-resisting material below 200 ℃, and the storage cylinder is metal making or enamelware etc.Power supply is supplied with or external low-voltage DC by the battery that places the lunch box bottom.Employed heater element has positive temperature coefficient in the technical solution adopted in the utility model, i.e. ptc characteristics.Under the situation that is communicated with power supply, PTC element self temperature raises.When temperature reached the element curie point, the resistance value of this element sharply increased, and component temperature no longer raises.Utilize this characteristic, just can limit the temperature heating heated object.

After adopting such structure, owing to be placed with an electric heater between storage cylinder and heat-insulation layer, after connecting power supply, the electric heater evolution of heat can remedy dispersed heat, and Sheng food is heated, thereby has improved the heat-insulating property of lunch box.Because adopted novel exothermic material such as PTC heater element to make thermal source, its automatic constant-temperature function makes the constant temperature of the institute's food of containing energy long period maintenance again.Because power supply can make the adaptation of product strong with low-voltage DC and battery, and is easy to carry.

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Fig. 1 is the cutaway view of the incubation canteen specific embodiment of the present utility model;

Fig. 2 is the circuit diagram of the incubation canteen specific embodiment of the present utility model.

Incubation canteen shown in Figure 1 mainly is made up of box case (3), lid (2), heat-insulation layer (10), storage cylinder (4) electric heater (11) and handle (1).The profile of box case (3), lid (2) and storage cylinder (4) is cylindrical.Lid (2) is with box case (3) with connecting ring (9) and connecting ring (9) and is threaded.Lid (2) is connected with cassette with lid liner (7).Storage cylinder (4) is stuck on the connecting ring (9).The handle of tortuous bow shape, cross section rectangle (1) is fixed on the connecting ring (9) with screw (8), and can rotate in the certain angle scope.Electric heater (11) is placed between storage cylinder (4) outside and heat-insulation layer (10) inboard, and battery places the recessed battery case (12) in box case (3) bottom.Trip (15) is arranged, with the unlikely slip of stationary stroage battery (13) in the battery case.Battery case lid (14) is a dome-shaped, and it is connected by the battery case (12) of screw thread with box case (3) bottom.Battery is connected with electric heater (11) and external power supply by the socket (5) of lead (6), belt switch (16).

Electric routing switch shown in Figure 2, battery and PTC heater element are formed by connecting by lead.Battery is connected with the box external power with the PTC heater element parallel connection that switch is gone up in series connection again.When connecting the box external power, (16) the then evolution of heat of PTC heater element and steady temperature confession heat food closes a switch.After the box external power is connected,, then only battery (13) is charged as cut-off switch.If without external power supply, then can be behind the external power supply that breaks, close a switch (16) get final product.

During use, the lid of outwarding winding (2) is put into storage cylinder (4) with food, builds lid (2) and screws, and external power supply plug is inserted socket (5), and the food in the lunch box is heated, and in the time of heat food, battery (13) is recharged.Be heated to certain temperature, pull out plug.Press switch (16) button on the lunch box, the battery (13) in the lunch box is to electric heater (11) power supply, and electric heater (11) continues heating, and food temperature is increased to steady state value.Can be on lunch box not to be contained during food yet, cut-off switch (16) is connected external power supply, and battery (13) is charged.Also can be without battery (13), directly by external low-voltage DC power supply.

Certainly, the profile of lunch box except that circle, can also be made rectangle or other shape, handle (1) can be made on the lid (2).Lid (2) and box case (3) also can be used other connected mode except that being threaded.As snap-in, hinge type etc., the shape of handle (1) also can be made oblate or other shape in cross section.Heater element can also be with other heated at constant temperature element except that the PTC element.These conversion all drop within the protection domain of the present utility model.

Claims

1. incubation canteen is by lid (2), box case (3), handle (1) with place the storage cylinder (4) in the box case (3) to form; Be heat-insulation layer (10) between box case (3) and the storage cylinder (4); Lid (2).There is liner (7) inboard, and box case (3) is flexible connection with lid (2), and handle (1) is to flexibly connect with connecting ring (9); It is characterized in that: the electric heater (11) that it also has an energising rear surface temperature to be not more than 200 ℃ is positioned between storage cylinder (4) and the heat-insulation layer (10).

2. incubation canteen according to claim 1, it is characterized in that: this electric heater (11) is a thermal source with the PTC heater element, be put between lunch box inner thermal insulating layer (9) and the storage cylinder (4), electric heater (11) connects the battery (13) and the socket (5) of lunch box by lead (6) and switch (16).