CN208192843U - A kind of insulating pot - Google Patents

Abstract

The utility model can be applied to small household appliances field, provide a kind of insulating pot, including kettle body, heat-generating disc and bottom cover, and heat-generating disc is fixed on the bottom of the kettle body, and bottom cover is set to below kettle body and is connected and fixed by the first screw with heat-generating disc.Wherein, heat-generating disc is equipped with the first downwardly projecting stud, and the first stud is riveted on heat-generating disc, while bottom cover is equipped with fixed hole, the center line of first stud is overlapped with the center line of fixed hole, and the first screw is fixedly connected after passing through fixed hole with the first stud.Insulating pot further includes the thermal insulator for reducing the heat that the first stud is transmitted to bottom cover, thermal insulator high temperature resistant, heat transfer coefficient is low, while itself bears the first stud high temperature, the heat that the first stud is transmitted to bottom cover is reduced, prevents from melting after the bottom cover of plastic material is heated, influence the normal use and appearance of insulating pot, and the thermal insulator structure is simple, and it is easily fabricated, it is easy to assembly.

Description

A kind of insulating pot

Technical field

The utility model relates to small household appliances fields, and in particular, to a kind of insulating pot.

Background technique

The small household appliances majority with heating function is to use electrothermal tube as based on the heat-generating disc of heater element at present.? In terms of Product Assembly, bottom cover will usually connect cooperation with heat-generating disc, and bottom cover is as appearance member, usual selection appearance property is good, Material at low cost, such as PP, ABS, but the usual high temperature resistance of this appearance material is not strong, after being influenced by heat-generating disc, It is easy to cause plastic cement to melt.

Plastic cement melts in bottom cover, not only results in household electrical appliances internal structure and deforms, influences its own normal work, and Also there is certain influence to its exterior quality, loses the meaning for selecting appearance material production bottom cover.

Utility model content

In order to solve the above-mentioned technical problem, the utility model provides a kind of insulating pot, is reduced by setting thermal insulator The heat that heat-generating disc is transmitted to bottom cover, and then bottom cover is avoided to be influenced and melt by high temperature.

In order to reach the purpose of this utility model, the technical solution that the utility model is taken is as follows:

The utility model provides a kind of insulating pot, including kettle body, heat-generating disc and bottom cover, and the heat-generating disc is fixed on described The bottom of kettle body, the bottom cover are located at below the kettle body and are fixedly connected with the heat-generating disc, the heat-generating disc be equipped with to First stud of lower protrusion, the bottom cover are equipped with fixed hole, and the first screw passes through after the fixed hole with described first Stud is fixedly connected, and the insulating pot further includes the thermal insulator for reducing the heat that first stud is transmitted to the bottom cover.

The kettle body bottom of insulating pot is provided with heat-generating disc, and heat-generating disc converts electrical energy into thermal energy and water is heated；Bottom cover setting It is connected and fixed below kettle body and with heat-generating disc, bottom cover covering heat-generating disc keeps it not exposed.Heat-generating disc is equipped with downwardly projecting The first stud, the first stud is riveted on heat-generating disc, while bottom cover is equipped with fixed hole, in the first stud upper screwed hole Heart line is overlapped with the center line of fixed hole, and the first screw passes through fixed hole and fixes with the first stud, thus by heat-generating disc It is fixed with bottom cover.

Thermal insulator is additionally provided in insulating pot, the thermal insulator high temperature resistant, heat transfer coefficient is low, itself bears the first stud high temperature While, the heat that the first stud is transmitted to bottom cover is reduced, prevents from melting after the bottom cover of plastic material is heated, influences insulating pot Normal use and appearance.

Optionally, the thermal insulator includes the first thermal insulator, and first thermal insulator is fixed under first stud End.

First thermal insulator is fixed on the lower end of the first stud, and the fixed hole of the lower end and bottom cover that avoid the first stud is direct Contact prevents the first stud from directly transmitting heat to bottom cover, while first thermal insulator also acts as heat-blocking action, is further reduced The heat that first stud is transmitted to bottom cover.

Optionally, first thermal insulator is the first collet, and first collet has bottom wall and a side wall, described the The bottom wall of one collet is equipped with first through hole, and first collet is set in outside the lower end of first stud, and described the One screw is fixedly connected after passing through the first through hole with first stud.

First collet is set in the lower end of the first stud, the lateral wall of the interior sidewall surface of the first collet and the first stud The lower end surface of face cooperation, the bottom wall of the first collet and the first stud cooperates；It is provided with first through hole on the bottom wall of first collet, First screw sequentially passes through fixed hole, first through hole, finally screws in the first stud, passes through the spiral shell of the first screw and the first stud Line cooperation, heat-generating disc is fixedly attached together with bottom cover, the first collet be assembled to it is easy to operate on the first stud, and Convenient for the connection of the first screw.

Optionally, the upper surface of the fixed hole is equipped with circular orientation muscle, and the circular orientation muscle is set in described Outside first collet, and cooperates with the side wall of first collet and position.

Circular orientation muscle is set to the upper surface of fixed hole, and circular orientation muscle can play the work of assembly positioning and guiding With.Specifically, after circular orientation muscle covers outside the first collet, in the center line of fixed hole and the first stud upper screwed hole Heart line substantially overlaps, and connect after passing through fixed hole so as to the first screw with the threaded hole on the first stud, thus by heat-generating disc It is fixed with bottom cover.

Optionally, the thermal insulator includes the second thermal insulator, and second thermal insulator is arranged in first screw and institute It states between fixed hole.

The second thermal insulator being arranged between the first screw and fixed hole, itself bears the high temperature of the first screw, reduces The heat of bottom cover member transmitting of first screw near fixed hole avoids the bottom cover member due to long-time bears high temperature Damage.

It by the second thermal insulator and the first thermal insulator, can carry out that distributing is heat-insulated, and according to the difference of Position of Isolating Axial Heat, can adopt With the thermal insulator of different structure and material, the weight and material cost of the second thermal insulator Yu the first thermal insulator are advantageously reduced.

Optionally, second thermal insulator is the second heat insulating mattress, and second heat insulating mattress is equipped with the second through-hole, described the Two heat insulating mattress are fixed between the end of first screw and the lower end surface of the fixed hole.

Second thermal insulator is the heat insulating mattress of sheet, and the second through-hole is provided on second heat insulating mattress, and the first screw sequentially passes through Second through-hole, fixed hole, first through hole finally screw in the threaded hole of the first stud.Second heat insulating mattress is applied not only to the first spiral shell It is heat-insulated between nail and fixed hole, moreover it is possible to prevent the end of the first screw from abrading the lower end surface of fixed hole in rotation.

Optionally, second thermal insulator is the second collet, and the lower end of second collet is equipped with annular flange, institute The second collet is stated equipped with the second through-hole, the upper end of second collet passes through the fixed hole, the annular flange It is fixed between the end of first screw and the lower end surface of the fixed hole.

Second thermal insulator is the second collet, and the second collet lower end is equipped with annular flange, and annular flange is heat-insulated with second Set is integrally formed, easy to process, sound construction；The upper end of second collet is protruded into fixed hole, and annular flange is against solid Determine on the lower end surface of through-hole, and annular flange is fixed between the end of the first screw and the lower end surface of fixed hole.

The end of first screw and screw rod are isolated second collet with fixed hole, completely cut off well the first screw with Heat transfer between fixed hole protects bottom cover to damage from high temperature.In addition, the second collet can also prevent the end of the first screw The lower end surface or interior sidewall surface of head or screw rod scratch fixed hole.

Optionally, the insulating pot further includes upper connector, and the upper connector is fixedly connected with the heat-generating disc, and The upper connector is electrically connected with the heater element of the heat-generating disc, and first stud is located at the side of the upper connector.

Upper connector is fixed below heat-generating disc, is electrically connected with the heater element (such as heat-generating pipe) of heat-generating disc, at the same on connect Connecing device can also be connected to the lower connector in base of electric kettle, form current path, so that heater element is powered, heater element handle Electric energy is converted into thermal energy, and the water in insulating pot is boiled.The side of upper connector is arranged in the position of first stud, does not influence The location arrangements of connector.

In addition, upper connector is arranged between bottom cover and heat-generating disc, heat-blocking action is played, and between upper connector and bottom cover Nothing is directly connected to, and the heat of connector is avoided to be directly delivered to bottom cover.Therefore, upper connector has heat-insulated, protection bottom cover Effect.

Optionally, the heat-generating disc be equipped with the second downwardly projecting stud, the upper connector by the second screw with Second stud is fixedly connected.

Optionally, the kettle body is glass pot body, and the lower end of the glass pot body is equipped with the flanging to bend inwards, the hair Hot plate is fixed with the flanging, and sealing element is equipped between the heat-generating disc and the flanging.

Kettle body uses high temperature resistant heat insulation glass material, and good heat-insulation effect, appearance property is good, improves the usage experience of user. It is additionally provided with the flanging to bend inwards in the lower end of glass pot body, for being fixedly connected with heat-generating disc, can reduce to glass pot body The requirement of dimensional accuracy, and sealing element is equipped between heat-generating disc and flanging, guarantee tightness, prevents leak.

Compared to the prior art the technical solution of the utility model, has the following beneficial effects:

By the way that thermal insulator is arranged, solves the heat-insulating problem of heat-generating disc and bottom cover, and the structure of thermal insulator is simple, be easy to make It makes, it is at low cost, it is easy to assembly.

Other features and advantages of the utility model will illustrate in the following description, also, partly from specification In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages can pass through Specifically noted structure is achieved and obtained in the specification, claims and drawings.

Detailed description of the invention

Attached drawing is used to provide to further understand technical solutions of the utility model, and constitutes part of specification, It is used to explain the technical solution of the utility model together with embodiments herein, not constitute to technical solutions of the utility model Limitation.

Fig. 1 is the schematic cross-sectional view of insulating pot described in the utility model embodiment one；

Fig. 2 is the enlarged diagram of the portion A structure in Fig. 1；

Fig. 3 is the structural schematic diagram of the first collet in Fig. 1；

Fig. 4 is the schematic cross-sectional view of the first collet shown in Fig. 3；

Fig. 5 is the position view of the first stud on the heat-generating disc of insulating pot shown in FIG. 1；

Fig. 6 is the schematic cross-sectional view of insulating pot described in the utility model embodiment two；

Fig. 7 is the enlarged diagram of the portion B structure in Fig. 6；

Fig. 8 is the structural schematic diagram of the second collet in Fig. 6；

Fig. 9 is the schematic cross-sectional view of the second collet shown in Fig. 8.

Wherein, the relationship in Fig. 1-Fig. 9 between appended drawing reference and component names are as follows:

1 bottom cover, 11 fixed holes, 111 circular orientation muscle, 2 heat-generating discs, 21 first studs, 22 heater elements, 3 first every Hot jacket, the lower surface of 31 bottom walls, the upper surface of 32 bottom walls, 33 pre-tighten muscle, and 34 first through hole, 4 second heat insulating mattress, 4 ' second is heat-insulated It covers, 41 second through-holes, 42 annular flanges, 5 first screws, 6 kettle bodies, 60 flangings, connector on 7.

Specific embodiment

For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with attached drawing to this The embodiment of utility model is described in detail.It should be noted that in the absence of conflict, embodiment in the application and Feature in embodiment can mutual any combination.

Embodiment one:

As shown in Figures 1 to 5, a kind of insulating pot with heat insulation structural is present embodiments provided, includes kettle body 6, hair Hot plate 2 and bottom cover 1, wherein bottom cover 1 is located at 6 lower section of kettle body and is fixedly connected with heat-generating disc 2.The kettle body 6 can be glass pot body.

As shown in Fig. 2, bottom cover 1 is fixedly connected with heat-generating disc 2 by the first screw 5.Specifically, heat-generating disc 2 be equipped with to First stud 21 of lower protrusion, the first stud 21 are riveted on heat-generating disc 2, and offer threaded hole on the first stud 21.Fever When disk 2 works normally, the temperature of the first stud 21 and entire heat-generating disc 2 is higher, up to 100 degrees Celsius or more.Bottom cover 1 is equipped with Fixed hole 11, the center line of fixed hole 11 are overlapped with the center line of the first stud 21, and the first screw 5 passes through fixed hole 11 It is fixedly connected afterwards with the threaded hole on the first stud 21.Optionally, in the present embodiment, as shown in figure 5, heat-generating disc 2 is equipped with Three the first studs 21, i.e. bottom cover 1 are fixedly connected with heat-generating disc 2 by three the first screws 5.

Further, insulating pot further includes the thermal insulator for reducing the heat that the first stud 21 is transmitted to bottom cover 1, the resistance to height of thermal insulator Temperature, heat transfer coefficient is low, while itself bears the first 21 high temperature of stud, reduces the heat that the first stud 21 is transmitted to bottom cover 1, keeps away Exempt from that 1 temperature of bottom cover is excessively high, prevents from melting after the bottom cover 1 of plastic material is heated, influence the normal use and appearance of insulating pot.

Optionally, thermal insulator includes the first thermal insulator, and the first thermal insulator is fixed on the lower end of the first stud 21, avoids first Stud 21 and fixed hole 11 directly contact, and the first stud 21 is prevented directly to transmit heat to bottom cover 1, while this is first heat-insulated Part also acts as heat-blocking action, is further reduced the heat that the first stud 21 is transmitted to bottom cover 1.

In the present embodiment, the first thermal insulator be the first collet 3, the first collet 3 have bottom wall and side wall, first every Hot jacket 3 is set in outside the lower end of the first stud 21, and is fixed on the first stud 21.Wherein, the side wall of the first collet 3 and The outer side surface of one stud 21 cooperates, and the upper surface 32(of the bottom wall of the first collet 3 is shown in Fig. 4) lower end surface with the first stud 21 Cooperation, the first collet 3 coat the lower end of the first stud 21 and side wall, can reduce the heat that the first stud 21 is transmitted to bottom cover 1 Amount.

First through hole 34 is provided on the bottom wall of first collet 3, it is logical that the first screw 5 sequentially passes through fixed hole 11, first Hole 34 finally screws in the threaded hole on the first stud 21, passes through being threadedly engaged for the first screw 5 and the first stud 21, heat-generating disc 2 It is fixedly attached together with bottom cover 1.

In addition, the first collet 3 and the first stud 21 interference fit (tight fit), enable 3 lock ring of the first collet to exist On first stud 21, so that the assembly method of the first collet 3 and the first stud 21 is convenient and efficient, it is easy to disassemble.Optionally, exist In the present embodiment, as shown in Figure 3 and Figure 4, it can be set in the interior sidewall surface of the first collet 3 and pre-tighten muscle 33, make first heat-insulated Set 3 can lock ring on the first stud 21 so that the first collet 3 assembly it is stronger.

Optionally, as shown in figure 4, the diameter of first through hole 34 is D1, the internal diameter of the side wall of the first collet 3 is D2, D1 Less than D2, and D1 is greater than the diameter of the first screw 5, and D2 is greater than the outer diameter of the first stud 21.

Optionally, to guarantee to be fastenedly connected by the first screw 5 between bottom cover 1 and heat-generating disc 2, as shown in Fig. 2, The lower surface 31(of the bottom wall of the upper surface of fixed hole 11 and the first collet 3 is shown in Fig. 4) between there are gap H1, generally 0.5-2mm。

Optionally, the upper surface of fixed hole 11 is equipped with circular orientation muscle 111, and circular orientation muscle 111 is set in first Outside collet 3, and cooperate with the side wall of the first collet 3 and position, plays assembly for being fixedly connected for heat-generating disc 2 and bottom cover 1 and determine The effect of position guiding.Specifically, 111 sets of circular orientation muscle is after the first collet 3 is outer, the center line of fixed hole 11 and first The center line of 21 upper screwed hole of stud substantially overlaps, can be with the first stud 21 after passing through fixed hole 11 so as to the first screw 5 On threaded hole connection, so that heat-generating disc 2 and bottom cover 1 is fixed.

Optionally, in the present embodiment, the height H3 of circular orientation muscle 111 is generally 2-5mm, and H3 is greater than H1, so that ring Shape positioning bar 111 can cover outside the first collet 3.H3, which should be avoided, is configured excessive, in case circular orientation muscle 111 is come from The influence of the heat of first stud 21.

Optionally, thermal insulator further includes the second thermal insulator, the setting of the second thermal insulator the first screw 5 and fixed hole 11 it Between.

The second thermal insulator is provided between the first screw 5 and fixed hole 11, the second thermal insulator bears the first screw 5 High temperature prevents the first screw 5 from directly transmitting heat to fixed hole 11, avoids the bottom cover member near fixed hole 11 because of length Time bears high temperature and damages.

In the present embodiment, the second thermal insulator be the second heat insulating mattress 4, the second heat insulating mattress 4 be equipped with the second through-hole 41, second Heat insulating mattress 4 is fixed between the end of the first screw 5 and the lower end surface of fixed hole 11.

Second thermal insulator is the heat insulating mattress of sheet, which is provided with the second through-hole 41, and the first screw 5 is successively worn The second through-hole 41, fixed hole 11, first through hole 34 are crossed, the threaded hole on the first stud 21 is finally screwed in.Second heat insulating mattress 4 is not It is only used for heat-insulated between the first screw 5 and fixed hole 11, moreover it is possible to prevent the scratch in rotation of the end of the first screw 5 from fixing The lower end surface of through-hole 11.

Optionally, the material of the second heat insulating mattress 4 can be the low material of the heat transfer coefficients such as silica gel, mica sheet.

The temperature that general heating disk 2 passes on the first screw 5 will not be especially high, and under partial condition, the second heat insulating mattress 4 can also To cancel.

In the present embodiment, the second heat insulating mattress 4 and the first collet 3 are common heat-insulated, reduce what heat-generating disc 2 was transmitted to bottom cover 1 Heat.By the second heat insulating mattress 4 and the first collet 3, it is heat-insulated to carry out distributing, and according to the difference of Position of Isolating Axial Heat, can be used The thermal insulator of different structure and material advantageously reduces the weight and material cost of the second heat insulating mattress 4 and the first collet 3.

Optionally, it is the heat transfer being further reduced between heat-generating disc 2 and bottom cover 1, avoids the overheat of heat-generating disc 2 to bottom cover 1 causes adverse effect, and heater element 22 and bottom cover 1 cannot contact, and should have gap therebetween.Specifically, in the present embodiment In, distance H2 must not between circular orientation muscle 111 for the minimum clearance between heater element 22 and bottom cover 1, i.e. heater element 22 Less than 2mm, circular orientation muscle 111 is damaged to prevent hypotelorism high temperature.

As shown in Figure 1, insulating pot further includes upper connector 7, upper connector 7 is fixedly connected with heat-generating disc 2, and upper connection Device 7 is electrically connected with the heater element 22 of heat-generating disc 2, while upper connector 7 can be connected to the lower connector in base of electric kettle, shape At current path, heater element 22 is set to be powered, electric energy is converted into thermal energy by heater element 22, and the water in insulating pot is boiled.

Optionally, the side of upper connector 7 is arranged in the first stud 21, so that the position of the first stud 21 does not influence to connect Connect the location arrangements of device 7.

Optionally, upper connector 7 is fixedly attached to heat-generating disc 2 by the second screw.Specifically, heat-generating disc 2 be equipped with to Second stud of lower protrusion, the second stud are equipped with threaded hole, and upper connector 7 connects by the way that the second screw and the second stud are fixed It connects.

Upper connector 7 is arranged between bottom cover 1 and heat-generating disc 2, plays heat-blocking action, and between upper connector 7 and bottom cover 2 Nothing is directly connected to, and the heat of connector 7 is avoided to be directly delivered to bottom cover 1.Therefore, upper connector 7 has heat-insulated, protection bottom cover 1 effect.

Optionally, as shown in Figure 1, kettle body 6 is glass pot body, the lower end of glass pot body is equipped with the flanging 60 to bend inwards, Heat-generating disc 2 and flanging 60 are fixed, and sealing element is equipped between heat-generating disc 2 and flanging 60.

Kettle body 6 uses high temperature resistant heat insulation glass material, and good heat-insulation effect, appearance property is good, can effectively improve making for user With experience.It is additionally provided with the flanging 60 to bend inwards in the lower end of glass pot body, for being fixedly connected with heat-generating disc 2, can reduce pair The requirement of the dimensional accuracy of glass pot body, and sealing element is equipped between heat-generating disc 2 and flanging 60, guarantee tightness, prevents from seeping water.

Embodiment two:

A kind of insulating pot is present embodiments provided, as shown in Figures 6 to 9, the insulating pot and embodiment one of the present embodiment Insulating pot the difference is that: the structure of thermal insulator.

As shown in Figure 6 and Figure 7, in the present embodiment, thermal insulator only includes the second collet 4 ', passes through second collet 4 ' It is thermally shielded.

Specifically, as shown in Figure 8 and Figure 9, it is in flange arrangement that the second collet 4 ' is whole, and 4 ' lower end of the second collet is equipped with Annular flange 42, annular flange 42 are integrally formed with the second collet 4 ', easy to process, sound construction, and the second collet The second through-hole 41 is offered on 4 '.

When installation, as shown in fig. 7, fixed hole 11 is protruded into the upper end of the second collet 4 ' is then pierced by fixed lead to from top Hole 11, annular flange 42 are against on the lower end surface of fixed hole 11, and annular flange 42 is fixed on the end of the first screw 5 and consolidates Between the lower end surface for determining through-hole 11.

The end of first stud 21 and screw rod are isolated second collet 4 ' with fixed hole 11, the ring of the second collet 4 ' Shape flange 42 and side wall play heat-blocking action, have completely cut off the heat transfer between the first screw 5 and fixed hole 11 well, every Thermal effect is more obvious, and bottom cover 1 is protected to damage from high temperature.In addition, the second collet 4 ' can also prevent the end of the first screw 5 Or lower end surface or the interior sidewall surface of screw rod scratch fixed hole 11.

The present embodiment reduces the quantity of thermal insulator, simplifies structure compared with embodiment one.

It should be noted that can also be by the second collet 4 ' in the present embodiment and the first collet in embodiment one 3 are used cooperatively, to enhance heat insulation.

Although embodiment disclosed by the utility model is as above, the content only the utility model for ease of understanding And the embodiment used, it is not intended to limit the utility model.Technical staff in any the utility model fields, Under the premise of not departing from spirit and scope disclosed by the utility model, it can be carried out in the form and details of implementation any Modification and variation, but the scope of patent protection of the utility model, the appended claims that must still be subject to are defined.

Claims (10)

1. a kind of insulating pot, including kettle body, heat-generating disc and bottom cover, the heat-generating disc are fixed on the bottom of the kettle body, feature Be: the bottom cover is located at below the kettle body and is fixedly connected with the heat-generating disc, and the heat-generating disc is equipped with downwardly projecting The first stud, the bottom cover is equipped with fixed hole, and the first screw passes through solid with first stud after the fixed hole Fixed connection, and the insulating pot further includes the thermal insulator for reducing the heat that first stud is transmitted to the bottom cover.

2. insulating pot according to claim 1, it is characterised in that: the thermal insulator include the first thermal insulator, described first Thermal insulator is fixed on the lower end of first stud.

3. insulating pot according to claim 2, it is characterised in that: first thermal insulator is the first collet, described the One collet has bottom wall and side wall, and the bottom wall of first collet is equipped with first through hole, and first collet is arranged Outside the lower end of first stud, first screw is fixedly connected after passing through the first through hole with first stud.

4. insulating pot according to claim 3, it is characterised in that: the upper surface of the fixed hole is equipped with circular orientation Muscle, the circular orientation muscle are set in outside first collet, and are cooperated with the side wall of first collet and positioned.

5. insulating pot described in any one of -4 according to claim 1, it is characterised in that: the thermal insulator includes second heat-insulated Part, second thermal insulator are arranged between first screw and the fixed hole.

6. insulating pot according to claim 5, it is characterised in that: second thermal insulator is the second heat insulating mattress, described the Two heat insulating mattress are equipped with the second through-hole, second heat insulating mattress be fixed on first screw end and the fixed hole Between lower end surface.

7. insulating pot according to claim 5, it is characterised in that: second thermal insulator is the second collet, described the The lower end of two collets is equipped with annular flange, and second collet is equipped with the second through-hole, the upper end of second collet Across the fixed hole, the annular flange be fixed on first screw end and the fixed hole lower end surface it Between.

8. insulating pot described in any one of -4 according to claim 1, it is characterised in that: the insulating pot further includes upper connection Device, the upper connector are fixedly connected with the heat-generating disc, and the heater element of the upper connector and heat-generating disc electricity Connection, first stud are located at the side of the upper connector.

9. insulating pot according to claim 8, it is characterised in that: the heat-generating disc is equipped with the second downwardly projecting spiral shell Column, the upper connector are fixedly connected by the second screw with second stud.

10. insulating pot described in any one of -4 according to claim 1, it is characterised in that: the kettle body is glass pot body, described The lower end of glass pot body is equipped with the flanging that bends inwards, and the heat-generating disc is fixed with the flanging, and the heat-generating disc with it is described Sealing element is equipped between flanging.