CN101785627B - Novel electrical heating vessel and manufacturing process thereof - Google Patents

Abstract

The invention relates to a novel electrical heating vessel and a manufacturing process thereof. The manufacturing process comprises the following steps: making a product trough according to the shape of the vessel body, directly enwinding a heating wire on the product trough along the direction of the product trough and on the outer side of the vessel body, and connecting the heating wire with a power supply via a metal sheet; arranging magnesium oxide powder around the heating wire, compacting the magnesium oxide powder by means of pressing, rolling or inward expansion; and attaching a thermal insulation film on the inner side of a housing and welding to seal the housing. Since the product trough is firstly made according to the shape of the vessel body and then the heating wire is directly enwound on the vessel body to heat the vessel, the invention reduces the thermal energy loss in the conduction of an intermediate metal tube, increases the contact area with the vessel, and improves the utilization rate of thermal energy. Moreover, the invention can avoid the problem of charring caused by local heating and the increase of food safety risks due to direct heating in the liquid.

Description

A kind of novel electrical heating vessel and manufacturing process thereof

(1) technical field

The invention belongs to the electric-heating technology field, especially relate to a kind of electric-heating container and manufacturing process thereof.

(2) background technology

In the prior art as soy bean milk making machine, hot-water bottle, coffee pot, electric cooker, electric pressure cooking saucepans etc. carry out mode of heating to container generally two kinds, a kind of mode is the bottom heating, be that calandria is arranged on container bottom, heat container heating side by the bottom, thereby the liquid in the container is heated, it as the patent No. 200720054995.5 Chinese utility model patent thermal-insulation electric heating kettle, it comprises the kettle body, be installed on the independent power supply base of kettle body bottom, bottom in the kettle body is provided with heat-generating disc, one side is provided with heater in the bottom surface of this heat-generating disc, and opposite side is provided with temperature controller in the bottom surface of heat-generating disc.Because of being provided with heater in the bottom surface of heat-generating disc, this heater if with the kettle body when independently the power supply base coupling is switched on, just can continue distribute heat.This local heat method, the inhomogeneous situation that occurs burning of being easy to because heated object is heated, another kind of mode is that heating tube directly is set in container, be among heating tube is arranged on liquid liquid directly to be heated, as the patent No. is that 91205645.2 long-life electric kettle (device) is the electrically heated hot water apparatus of a kind of resistance-type, inner bottom part at heated water container has sealed attachment mechanism by putting a bottom, and be fixedly connected with water container, its upper vertical stand in the bottom and with the bottom be the board-like electric heating element of resistance electric heating of complete integral body, whole electric heating element all is immersed in the water of water container except that the bottom surface.Heating tube is set directly in the liquid can to destroy liquid former nutritious, and increased the risk of edible safety, a large amount of incrustation scales that after long-term the use, can form.

And the electrothermal tube that existing electrical heating is adopted is that a heating wire is penetrated in the metal tube, pours into the magnesium powder again in metal tube, finalizes the design by external force again.It as the Chinese utility model patent patent No. a kind of liquid electric heater of 200820235488.6, comprise metal outer pipe, its middle part is provided with resistance wire, is filled with insulating heat-conduction material between described resistance wire and the described metal outer pipe, wherein, be with the high-temperature insulation cover on described metal outer pipe surface.Be the double protection electric heater that 200820160215.X relates to a kind of single-ended outlet also just like the Chinese utility model patent patent No..This double protection electric heater includes the metal shell of a tubulose, be mounted with resistance wire in the shell, the sealing of shell one end, two exits of resistance wire are all drawn from the blank area of the shell other end, described resistance wire periphery also is with the inner sleeve of layer of metal, be filled with the heat conductive insulating medium between the inwall of inner sleeve and the resistance wire as inner insulating layer, also be filled with the heat conductive insulating medium between the outer wall of inner sleeve and the outer casing inner wall as external insulation layer.Shortcoming such as electrothermal tube cost height, the heat energy utilization rate of Sheng Chaning be low like this.

(3) summary of the invention

In order to overcome deficiency of the prior art, the invention provides that a kind of heat energy utilization rate is higher, energy-conservation, homogeneous heating and increase the electric-heating container of edible safety.

Another object of the present invention provides low, the even heating of a kind of cost, heat energy utilization rate height, rapid heat dissipation, security performance height, long electric heater manufacturing process of life-span.

The technical scheme that the present invention solves its technical problem is:

A kind of novel electrical heating vessel, comprise vessel, the parallel heating wire that is wound with on the described vessel lateral surface, be provided with the goods groove between the described heating wire, the two ends of heating wire are connected with sheet metal respectively, the sheet metal electric connection of power supply, and heating wire and goods groove are provided with outer cover outward, be filled with magnesia powder in the described goods groove, between heating wire and the vessel outer wall, all be filled with magnesia powder between heating wire and the outer cover.

Adopt canoe to make heating wire be wrapped in the vessel outside, increased the contact area of heating wire and container, solved the puzzlement that existing container causes burning etc. because of local heat, also avoided electrothermal tube directly is placed in the liquid destruction to food, reduce the heat energy loss of the conduction of intervening metal pipe simultaneously, significantly improved the heat energy utilization rate.When twining, can change canoe arbitrarily according to the container of Any shape, use more flexibly, greatly reduce cost.

As improvement, the outer cover inboard is provided with thermal isolation film.In outer cover built-in thermal isolation film, reduced the temperature of heater surfaces, be unlikely to outer cover because of the too high life-span that influences product of temperature, improved the security of products energy greatly.

As preferably, heating wire coiling or with the coiling of waveform mode threadably.Heating wire coiling is in different ways as required heated it at container bottom.

Heating wire is connected by rivet with sheet metal.With the riveted joint mode heating wire and sheet metal are linked together, connect reliable.

A kind of manufacturing process of novel electrical heating vessel,

A, manufacture the goods groove, in the goods groove, fill magnesia powder, and the goods groove is arranged on the vessel outside according to the shape of vessel;

B, heating wire directly is wrapped between the goods groove according to goods groove direction, also is wrapped in simultaneously on the vessel outside, and heating wire is connected power supply by sheet metal;

C, between heating wire and vessel, fill magnesia powder, on heating wire, lay magnesia powder, and by press, roll or intramedullary expansion with the magnesia powder compacting;

D, thermal isolation film is attached to the outer cover inboard, and with the outer cover welded closure on vessel, make heating wire, goods groove be isolated from the outside.

The present invention makes the goods groove according to the vessel shape earlier in manufacture process, heating wire is twined again, and makes heating wire is kept apart, and adopts the magnesia powder of special formulation to fill, and realizes the heat conductive insulating layer.

Beneficial effect of the present invention is: the present invention is wrapped in heating wire on the vessel container is directly heated, and has reduced the heat energy loss of the conduction of intervening metal pipe, has also increased and the container contact area, has improved the heat energy utilization rate.And avoided the puzzlement of burning and directly in liquid, heated increasing the foodsafety risk because of local heat.

The present invention makes the goods groove according to the vessel shape earlier in manufacture process, heating wire is twined again, and makes heating wire is kept apart that the present invention is change shape as required, makes range of application more extensive, greatly reduces cost.The present invention also adopts the magnesia powder of special formulation to fill, and realizes the heat conductive insulating layer.

(4) description of drawings

Fig. 1 is a structural representation of the present invention.

(5) specific embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.

When making was of the present invention, its manufacturing process was: manufacture the goods groove according to the shape of vessel earlier, and the goods groove is arranged on the vessel outside, and fill magnesia powder in the goods groove; Then heating wire directly is wrapped between the goods groove according to goods groove direction, also is wrapped in simultaneously on the vessel outside, and heating wire is connected power supply by sheet metal; Between heating wire and vessel, fill magnesia powder, lay magnesia powder on the heating wire, by press, roll or intramedullary expansion with the compacting of magnesium powder; Thermal isolation film is attached to the outer cover inboard, and, makes heating wire, goods groove be isolated from the outside the outer cover welded closure.Electric-heating container after making promptly as shown in Figure 1, a kind of novel electrical heating vessel, comprise vessel 1, the parallel heating wire 3 that is wound with on vessel 1 lateral surface, be provided with goods groove 2 between the heating wire, be filled with magnesia powder 4 in the goods groove 2, sheet metal has been riveted at the two ends of heating wire 3 respectively, the sheet metal electric connection of power supply, heating wire and goods groove are provided with outer cover 6 outward, be provided with thermal isolation film 5 in the outer cover 6, between described heating wire and the container outer wall, all be filled with magnesia powder 4 between heating wire and the thermal isolation film, magnesia powder is as the heat conductive insulating layer.

Vessel comprises container side wall and container bottom, and container side wall is wrapped in heating wire around the container, and container bottom is arranged on bottom below with heating wire, and heating wire is threadably or with the coiling of waveform mode.

Electric heater of the present invention and manufacturing process thereof are compared with electrothermal tube and manufacture method thereof that prior art is produced, have the following advantages: 1, energy-conservation: manufacturing method according to the invention, use heating wire winding, directly vessel is heated, reduced the heat energy loss of the conduction of intervening metal pipe; And because it adopts canoe, increased the contact area with container, solved existing container (soybean milk cup, hot-water bottle, coffee pot, electric cooker, electric pressure cooking saucepan etc.) because of local heat, the puzzlement that causes burning etc. has significantly improved the utilization rate of heat energy; 2, thermal isolation film arranged in that outer cover is included, reduced the temperature on vessel surface, can significantly increase the power of product, be unlikely to outer cover because of the too high life-span that affects product of temperature, the security performance of the product that greatly improves, and further improved the utilization rate of heat energy, saved the loss of heat energy. 3, environmental protection: because it does not directly heat in liquid with electrothermal tube, avoid producing incrustation scale after long-time the use, increased edible security; 4, reduce cost: manufacturing method according to the invention, can change arbitrarily the winding shape, be fit to any shape the homogeneous heating of container, and greatly reduce cost.

Claims (5)

1. novel electrical heating vessel, comprise vessel, it is characterized in that: the parallel heating wire that is wound with on the described vessel lateral surface, be provided with the goods groove between the described heating wire, the two ends of heating wire are connected with sheet metal respectively, the sheet metal electric connection of power supply, and heating wire and goods groove are provided with outer cover outward, be filled with magnesia powder in the described goods groove, and between heating wire and the vessel outer wall, all be filled with magnesia powder between heating wire and the outer cover.

2. a kind of novel electrical heating vessel according to claim 1 is characterized in that: described outer cover inboard is provided with thermal isolation film.

3. a kind of novel electrical heating vessel according to claim 1 and 2 is characterized in that: described heating wire is threadably or with the coiling of waveform mode.

4. a kind of novel electrical heating vessel according to claim 3 is characterized in that: described heating wire is connected by rivet with sheet metal.

5. the manufacturing process of a novel electrical heating vessel is characterized in that:

A, manufacture the goods groove, in the goods groove, fill magnesia powder, and the goods groove is arranged on the vessel outside according to the shape of vessel;

B, heating wire directly is wrapped between the goods groove according to goods groove direction, also is wrapped in simultaneously on the vessel outside, and heating wire is connected power supply by sheet metal;

C, between heating wire and vessel, fill magnesia powder, on heating wire, lay magnesia powder, and by press, roll or intramedullary expansion with the magnesia powder compacting;

D, thermal isolation film is attached to the outer cover inboard, and with the outer cover welded closure on vessel, make heating wire, goods groove be isolated from the outside.

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