CN2299570Y

CN2299570Y - Vacuum insulating device for electric heating vessel

Info

Publication number: CN2299570Y
Application number: CN 97218902
Authority: CN
Inventors: 方立武
Original assignee: KELONG ELECTRONIC TECHNOLOGY Co BEIJING
Current assignee: KELONG ELECTRONIC TECHNOLOGY Co BEIJING
Priority date: 1997-06-06
Filing date: 1997-06-06
Publication date: 1998-12-09
Anticipated expiration: 2007-06-06

Abstract

The utility model relates to a vacuum heat insulating device for an electric heating utensil. Double layer walls which are provided with sandwich layer space are arranged on a top cover with a pressure function and in a container in an outer protective cover body. A vacuum state is formed between each double layer wall. The outside of the bottom of each inner layer wall is provided with a convolution-shaped heating pipe, and the bottom of each outer layer wall is provided with a temperature sensor. The utility model which has the advantages of electric energy saving and convenient use processes heat insulating control according to a set value, and in addition, the utility model can insulate heat for a long time.

Description

The vacuum insulation that is used for electrical heated appliance

The utility model belongs to the civil electric appliance product, specially refers to the vacuum insulation of electrical heated appliance.

For general civilian vacuum insulation, the simplest as common thermos flask, thermos cup, heat-preservation cylinder etc., majority is to adopt the inner-tube structure that has vacuum interlayer, carry out heat-insulation and heat-preservation, inner bag has glass structure respectively, various classifications such as stainless steel structure, the insulation of this appliances all belongs to static insulation, temperature retention time is limited, water in the container or other liquid make heat insulation effect undesirable always along with the time progressively lowers the temperature, and other has a kind of thermos cup or tube that electric heater is housed, though can utilize the energising heating at any time, with the water in the container or other liquid warming, but owing to do not have the vacuum heat-insulation measure, often limit heating edge heat radiation, not only heat time heating time is very long, and, need constantly consume electrical heating power for keeping uniform temperature, cause waste of electric energy.To sum up the defective of two kinds of insulation utensils just inspires design a kind of energy-saving, and not only can comparatively fast heat up but also can be incubated the long period, and the device of sustainable insulation.

The purpose of invention, hold time shorter for overcoming static vacuum heat-preserving, and the bigger defective of electrical heat tracing consumed energy, design a kind of device that improves the efficiency of heating surface, include the vacuum interlayer heat-insulation and heat-preservation, after temperature drops to a certain degree, can also continue the attemperator of energising heating automatically simultaneously.

The objective of the invention is to rely on following technical proposals to realize; in a container that has in pressure function top cover and the device outer protecting cover body; double wall with mezzanine space is set; be vacuum state between the wall; the inner layer wall bottom outside is equipped with the spiral heating tube; by the ceramic fenestra of sealing-in in the outer wall bottom; heater strip is drawn out on the external power supply; temperature sensor is equipped with in the outer wall bottom; be connected to external power supply by opening, disconnect the pass device; the outlet pipe that is connecting between the inside and outside wall is drawn out to outside the attemperator by bend pipe.

The double wall of described mezzanine space is made by stainless steel, and the metal seam crossing adopts the vacuum seal welding entirely, and interlayer inside vacuumizes, and vacuum is 10 ^-3Pa, the side of outer wall layer is welded with getter, constantly inhales and goes the interlayer gaseous impurity to keep the stable of its vacuum, can be incubated for a long time.

Further specify embodiment below in conjunction with accompanying drawing:

Description of drawings

Fig. 1 is the internal structure cutaway view of electrical heated appliance vacuum insulation;

Fig. 2 is that bottom of device A is to cutaway view;

Fig. 3 is the B partial enlarged view;

Fig. 4 is the C partial enlarged view;

Among the figure, top cover 1 is conventional press water valve protection cap lid structure, and it can adopt common plastic injection-moulded forming, and when exerting pressure downwards, water or flowing material will cause outside the device to external pressure along Discharging bent-tube 12, also can directly cap be opened the taking-up article.Between stainless steel inner layer wall 2 and the outer wall 3, rely on vavuum pump to be pumped into 10 ^-3After the Pa vacuum; constantly keep its vacuum by the getter that welds 3.1 on the outer wall; getter is to be constituted and be soldered on the outer wall body 3 by connecting band 3.3 by ferrozirconium vanadium material 3.2; shell 4 connects and composes the outer protective cover body with base 5 by clamp-screw 6; in other embodiments; being connected between shell 4 and the base 5, also can adopt the spiral connected mode.The heating tube 7 of spiral is close to the inner layer wall bottom outside, is wrapped in the helical form Ni-Cr silk 7.2 at center and filler MgO by spiral stainless-steel thin-wall pipe 7.1 ₂Insulating powder constitutes.Ceramic window 8 is the bottoms that are connected outer wall 3 with vacuum welding method, heating tube is guided external power supply thus into, opening, the disconnecting pass device 9 that is installed in the external circuits links to each other with the sensor 10 that is installed in outer wall 3 bottoms, switching to heating tube 7 is controlled, and to reach the temperature in the container is controlled by set temperature value.

By the article of insulation being sent with the tube connector and the outlet pipe 12 of seal welding at the bottom of the inside and outside layer of the container wall.

For the device that a volume is the 3-4 liter, the dissipated power of heating tube is 500W, 220V.

The advantage of this device is, both had the insulation of vacuum layer, makes to be in keeping warm mode in the container for a long time, and the heating tube heating is arranged, and heat time heating time is short, must not worry very fast heat radiation antivacuum state under and heating for a long time of needing kept, thereby the saving energy.This device can develop into series of products, big can be incubated multiple material, and when holding temperature is less demanding, directly use vacuum heat-preserving to tubbiness to cup-shaped for a short time, and is also very convenient without electrical heating; Flexible user mode is provided.Prove that through embodiment this product heat insulation effect is good, easy to use, is suitable for popularization.

Claims

1; a kind of vacuum insulation that is used for electrical heated appliance; comprise a container that has in pressure function top cover and the device outer protecting cover body; it is characterized in that; double wall with mezzanine space is set; be vacuum state between the wall; the inner layer wall bottom outside is equipped with the spiral heating tube; by the ceramic fenestra of sealing-in in the outer wall bottom; heater strip is drawn out on the external power supply; temperature sensor is equipped with in the outer wall bottom; by opening; disconnect the pass device and be connected to external power supply, in; the outlet pipe that is connecting between the outer wall is drawn out to outside the attemperator by bend pipe.

2, device according to claim 1 is characterized in that, double wall is made by stainless steel, and the metal seam crossing adopts the vacuum seal welding entirely, and interlayer inside vacuumizes, and vacuum is 10 ^-3More than the Pa.

3, device according to claim 1 is characterized in that, getter [3.1] is to be soldered on the outer wall body [3] by ferrozirconium vanadium material [3.2] formation and by connecting band [3.3].

4, device according to claim 1 is characterized in that, the heating tube of spiral [7] is close to the inner layer wall bottom outside, is wrapped in the helical form Ni-Cr silk [7.2] and the filler MgO at center by [7.1] under the spiral stainless-steel thin-wall pipe ₂Insulating powder constitutes.

5, device according to claim 1 is characterized in that, is installed in the sensor [10] of opening, disconnecting in the external circuits bottom closing device [9] and being installed in outer wall [3] and links to each other, and the switching of heating tube [7] is controlled.

6, device according to claim 1 is characterized in that, its shell [4] can connect and compose the outer protective cover body by trip bolt [6] with base [5], also can adopt spiral connected mode between shell and base.