Heating kettle

Abstract

The utility model discloses a heating kettle which comprises a kettle body provided with a kettle bottom, and the kettle bottom is provided with an installation face. The heating disc is arranged at the bottom of the kettle bottom and is provided with a binding surface connected with the mounting surface; the pre-positioning ring is connected with the kettle bottom and is arranged outside the heating disc in a surrounding manner; the bottom cover is arranged at the bottom of the kettle bottom and covers the heating disc and the pre-positioning ring; the connecting structure is connected between the heating disc and the pre-positioning ring; or is connected among the heating disc, the pre-positioning ring and the bottom cover. According to the heating kettle, due to the fact that the adding disc and the kettle bottom are in plane contact, the adding disc and the kettle bottom do not need to be bonded through glue, no glue is exposed out of the kettle body and does not touch water in the kettle body, and use safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hot kettle, especially to a heating kettle. BACKGROUND

[0002] Electric kettle is a kind of commonly used electric appliance for quickly boiling water, including kettle body for water and heating disc and other structures for heating arranged at the bottom of kettle body.For example, these heating kettles with glass material such as health-care kettle, milk frother or tea boiler, when installing heating disc on kettle body, it is installed in the kettle body by the way of compression with adhesive, which can contact with water, so that the adhesive will be aged due to heat, which will affect water quality safety after long-term use. SUMMARY

[0003] To solve at least one problem existing in the prior art, according to one aspect of the utility model, a heating kettle is provided, comprising:

[0004] Kettle body, the kettle body has kettle bottom, the kettle bottom has installation surface;

[0005] Heating disc, the heating disc is arranged at the bottom of the kettle bottom, and has a matching surface connected to the installation surface;

[0006] Pre-positioning ring, connected with the kettle bottom, and surrounding the heating disc outside;

[0007] Bottom cover, arranged at the bottom of the kettle bottom, and covering the heating disc and the pre-positioning ring outside;

[0008] Connecting structure, connected between the heating disc and the pre-positioning ring;Or connected among the heating disc, the pre-positioning ring and the bottom cover.

[0009] In some embodiments, one side of the pre-positioning ring towards the kettle bottom or one side of the kettle bottom towards the pre-positioning ring is provided with a glue groove.

[0010] In some embodiments, the connecting structure is connected between the pre-positioning ring and the heating disc, and the connecting structure comprises an annular ring and a connecting piece;

[0011] Wherein, the annular ring is connected with the pre-positioning ring through the connecting piece, and the annular ring and the heating disc abut;

[0012] Or, the annular ring and the pre-positioning ring are integrally arranged, and the annular ring and the heating disc are connected through the connecting piece;

[0013] Or, the annular ring is connected with the pre-positioning ring and the heating disc respectively through the connecting piece.

[0014] In some embodiments, the connecting member is a second glue and / or a first bolt.

[0015] In some embodiments, the annular ring is connected to the first bolt and the pre-positioning ring, and the annular ring and the heating disc are in abutment.

[0016] The annular ring comprises a first connecting flange, an arc-shaped protruding portion and a second connecting flange connected in sequence, the first connecting flange and the pre-positioning ring are connected by the first bolt, the pre-positioning ring and the heating disc have a gap, the arc-shaped protruding portion is arranged in the gap, and the second connecting flange is in abutment with the heating disc.

[0017] In some embodiments, the pre-positioning ring further comprises an extension wall extending along the axial direction of the kettle body and extending away from the kettle bottom, the extension wall is connected between the first connecting flange and the arc-shaped protruding portion, and the pre-positioning ring is provided with a positioning column connected by the first bolt and the first connecting flange.

[0018] In some embodiments, at least one of a gap exists between the arc-shaped protruding portion and the side wall of the pre-positioning ring or between the arc-shaped protruding portion and the side wall of the heating disc.

[0019] In some embodiments, the gap ranges from 0.2mm to 0.5mm.

[0020] In some embodiments, the connecting structure is connected between the pre-positioning ring and the heating disc.

[0021] The connecting structure comprises a plurality of connecting pieces arranged in a spaced manner and a plurality of connecting members, the plurality of connecting pieces are arranged along the circumferential direction of the heating disc, and each of the connecting pieces is connected to the pre-positioning ring and the heating disc by the connecting member.

[0022] In some embodiments, the connecting structure is connected among the heating disc, the pre-positioning ring and the bottom cover.

[0023] The connecting structure comprises an elastic member in abutment between the heating disc and the bottom cover and a second bolt connected to the bottom cover and the pre-positioning ring.

[0024] In summary, the heating kettle provided by the utility model has the following technical effects:

[0025] Using the bottom of the kettle as the mounting base, a pre-positioning ring is connected to the bottom of the kettle, for example, by applying adhesive. The heating plate is placed inside the pre-positioning ring, ensuring that the contact surface of the heating plate is in contact with the mounting surface of the kettle bottom. Finally, a connecting structure secures the heating plate to the bottom of the kettle, thus fixing the heating plate to the bottom of the kettle. The bottom cover can then be installed. Alternatively, the pre-positioning ring and heating plate can be installed first, and then the pre-positioning ring, heating plate, and bottom cover can be secured separately using the connecting structure. Therefore, since the heating plate is directly attached to the bottom of the kettle, no adhesive is needed, and no adhesive is exposed inside the kettle, preventing contact with the water inside and ensuring safe use. Attached Figure Description

[0026] Figure 1 This is a perspective view of the kettle according to the first embodiment of the present utility model;

[0027] Figure 2 for Figure 1 An exploded view of the kettle in the picture;

[0028] Figure 3 for Figure 1 An exploded view of the kettle in the picture from another perspective;

[0029] Figure 4 for Figure 1 Left view of the kettle in the picture;

[0030] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0031] Figure 6 for Figure 5 Enlarged view of point I in the middle;

[0032] Figure 7 for Figure 2 A schematic diagram of the pre-positioning ring structure in the diagram;

[0033] Figure 8 for Figure 2 A schematic diagram of the ring structure in the image;

[0034] Figure 9 This is a schematic diagram of the connection structure of the second embodiment of the present utility model;

[0035] Figure 10 This is a schematic diagram of the connection structure according to the third embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the connection structure according to the fourth embodiment of the present invention.

[0037] The drawings: 100 - a heating kettle, 10 - a kettle body, 11 - a kettle body, 12 - a kettle bottom, 13 - a water containing cavity, 14 - a mounting surface, 20 - a heating disc, 21 - a fitting surface, 30 - a first glue body, 40 - a pre-positioning ring, 41 - a glue containing groove, 42 - a positioning column, 50 - a connecting structure, 51 - an annular ring, 511 - a first connecting flange, 512 - an arc-shaped convex part, 513 - a second connecting flange, 514 - an extension wall, 52 - a connecting piece, 53 - an elastic piece, 54 - a second bolt, 55 - a connecting piece, 60 - a bottom cover, 61 - a bearing column, 62 - a connecting column. DETAILED DESCRIPTION

[0038] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0039] In the description of the present application, it should be pointed out that the directions or position relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0041] The present application will be further described in detail below in combination with the drawings.

[0042] Embodiment one:

[0043] Please refer to Figures 1 to 8 The heating kettle 100 provided by the embodiments of the present application comprises a kettle body 10, a heating disc 20, a pre-positioning ring 40, a connecting structure 50 and a bottom cover 60.

[0044] The kettle body 10 is provided with a water containing cavity 13 for containing water, and has a kettle bottom 12 with a mounting surface 14; the heating disc 20 is arranged at the bottom of the kettle bottom 12 and has a fitting surface 21 connected to the mounting surface 14; the pre-positioning ring 40 is connected to the kettle bottom 12 and surrounds the heating disc 20; the bottom cover 60 is arranged at the bottom of the kettle bottom 12 and covers the heating disc 20 and the pre-positioning ring 40; the connecting structure 50 is connected between the heating disc 20 and the pre-positioning ring 40, or connected among the heating disc 20, the pre-positioning ring 40 and the bottom cover 60.

[0045] The heating kettle 100 is fixed by the kettle bottom 12 of the kettle body 10 as a mounting base, the pre-positioning ring 40 and the kettle bottom 12 are connected, for example, fixed by glue between the two, the heating disc 20 is placed in the pre-positioning ring 40, at the same time, the fitting surface 21 of the heating disc 20 and the mounting surface 14 of the kettle bottom 12 are fitted, finally, the connecting structure 50 is used to fix the heating disc 20 and the pre-positioning ring 40, that is, the heating disc 20 is fixed at the bottom of the kettle body 10, and finally, the bottom cover 60 is installed; or the pre-positioning ring 40 and the heating disc 20 are installed, and finally, the connecting structure 50 is used to fix the pre-positioning ring 40, the heating disc 20 and the bottom cover 60, which can also realize the fixation of the heating disc 20; therefore, since the heating disc 20 is directly fitted and installed at the bottom of the kettle body 10, it does not need to be bonded by glue, there is no glue exposed in the kettle body 10, and it will not touch the water in the kettle body 10, which ensures the safety in use.

[0046] The kettle body 10 of the embodiment includes a kettle body 11 and a kettle bottom 12 arranged at the bottom of the kettle body 11, and the kettle body 11 and the kettle bottom 12 are integrally formed by glass. The mounting surface 14 of the kettle bottom 12 refers to the plane of the side of the kettle bottom 12 away from the kettle body 11, which is used to fit the heating disc 20, so that the heat generated by the heating disc 20 when powered can be transmitted to the kettle body 11.

[0047] The pre-positioning ring 40 is connected to the kettle bottom 12 and functions as pre-positioning, which can limit the installation position of the heating disc 20 during installation, avoiding installation deviation. Specifically, the pre-positioning ring 40 and the kettle bottom 12 are fixed by glue in the embodiment. When the pre-positioning ring 40 and the kettle bottom 12 are fixed by glue, in order to inject more first glue 30 to ensure the connection stability between the two, at least one of the side of the pre-positioning ring 40 facing the kettle bottom 12 or the side of the kettle bottom 12 facing the pre-positioning ring 40 is provided with a glue containing groove 41 for injecting the first glue 30, which limits the first glue 30 and avoids the disorderly flow of the first glue 30 affecting the flatness of the bottom surface of the kettle bottom 12; at the same time, the glue containing groove 41 can limit the amount of the first glue 30, which ensures the connection stability between the pre-positioning ring 40 and the kettle bottom 12.

[0048] Specifically, please refer to Figure 6 and Figure 7 , the glue containing groove 41 of the embodiment is formed in the pre-positioning ring 40, since the pre-positioning ring 40 is an independent structure, can be set to different materials, thereby synchronously forming the pre-positioning ring 40 when forming the pre-positioning ring 40, more convenient to form the glue containing groove 41 relative to the way of forming the glue containing groove 41 in the kettle bottom 12 of glass material, at the same time, by forming the glue containing groove 41 in the pre-positioning ring 40, ensure that the kettle bottom 12 has a flat structure, ensure the structural strength of the kettle bottom 12.

[0049] Among them, when connecting, since the pre-positioning ring 40 is already glued in a fixed state, then the heating disc 20 and the pre-positioning ring 40 are fixed, finally the bottom cover 60 and the kettle bottom 12 are installed, the bottom cover 60 can be installed; Or when fixing the heating disc 20, connecting the connecting structure 50 to the heating disc 20, the bottom cover 60 and the pre-positioning ring 40, also can realize the fixing of the heating disc 20.

[0050] It can be understood that, since the first glue 30 is punched into the pre-positioning ring 40, the heating disc 20 will generate heat in the process of heating, in order to ensure the service life of the first glue 30, the inner wall of the pre-positioning ring 40 and the heating disc 20 have a spacing, by setting the spacing, avoid the heat of the heating disc 20 too much to transfer to the pre-positioning ring 40.

[0051] Among them, please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 , it is a connecting mode of the heating disc 20 and the pre-positioning ring 40 of the utility model, in order to facilitate the fixing of the installation position of the heating disc 20, the connecting structure 50 is connected between the pre-positioning ring 40 and the heating disc 20, in this way, since the pre-positioning ring 40 has been fixed in position after gluing, after placing the heating disc 20 in the pre-positioning ring 40, the heating disc 20 is fixed with the pre-positioning ring 40 through the connecting structure 50, the installation and fixing of the heating disc 20 can be realized, finally the bottom cover 60 is installed, the bottom cover 60 can be connected to the pre-positioning ring 40 when installing, also can be connected to the heating disc 20, or simultaneously connected to the pre-positioning ring 40 and the heating disc 20, or simultaneously connected to the pre-positioning ring 40, the heating disc 20 and the kettle bottom 12.

[0052] Specifically, when the connecting structure 50 is connected between the predetermined positioning ring 40 and the heating disc 20; the connecting structure 50 is a ring-shaped ring 51 and a connecting piece 52, the ring-shaped ring 51 is connected with the predetermined positioning ring 40 through the connecting piece 52, and the ring-shaped ring 51 abuts against the heating disc 20, so that the ring-shaped ring 51 is in a fixed state through the connecting piece 52 and the predetermined positioning ring 40, and abuts against the heating disc 20, when the electric kettle is in a use state, the ring-shaped ring 51 can support the heating disc 20, and the position of the heating disc 20 is limited.

[0053] Specifically, the connecting piece 52 of the embodiment is a first bolt, and the predetermined positioning ring 40 and the heating disc 20 have a gap therebetween, when the ring-shaped ring 51 is arranged, the ring-shaped ring 51 comprises a first connecting flange 511, an arc-shaped protruding portion 512 and a second connecting flange 513 connected in sequence, the first connecting flange 511 is connected with the predetermined positioning ring 40 through the first bolt, the arc-shaped protruding portion 512 is arranged in the gap, and the second connecting flange 513 abuts against one side of the heating disc 20 away from the kettle bottom 12, so that, since the second connecting flange 513 abuts against the surface of the heating disc 20, when the electric kettle 10 is placed vertically for use, the second connecting flange 513 has a supporting effect on the heating disc 20, the first connecting flange 511 and the predetermined positioning ring 40 are fixed after being connected through the first bolt, that is, the position of the heating disc 20 is fixed, and finally the bottom cover 60 is mounted; since the arc-shaped protruding portion 512 is arranged, the gap between the predetermined positioning ring 40 and the heating disc 20 is blocked, the position of the heating disc 20 is limited, and the accuracy of the installation position of the heating disc 20 is ensured.

[0054] Further, in order to ensure the connection stability between the first connecting flange 511 and the predetermined positioning ring 40, the predetermined positioning ring 40 further comprises an extension wall 514, the extension wall 514 extends along the axial direction of the kettle body 10 and extends away from the kettle bottom 12, the extension wall 514 is connected between the first connecting flange 511 and the arc-shaped protruding portion 512, and the predetermined positioning ring 40 is provided with a positioning column 42 connected with the first connecting flange 511, so that, by arranging the extension wall 514, the extension wall 514 has a certain extension height, the positioning column 42 with a certain height can be arranged on the predetermined positioning ring 40, a first bolt with a relatively long length can be arranged at the positioning column 42 when the positioning column 42 and the first connecting flange 511 are connected, the connection area with the predetermined positioning ring 40 is increased, so as to ensure the connection strength of the predetermined positioning ring 40 and the ring-shaped ring 51, and the connection strength of the heating disc 20 is also ensured.

[0055] Further, when the arc-shaped protruding part 512 is arranged, there is a gap between the sidewall of the arc-shaped protruding part 512 and the sidewall of the pre-positioning ring 40 or the sidewall of the heating disc 20, that is, there can be a gap between the arc-shaped protruding part 512 and the sidewall of the pre-positioning ring 40, there can be a gap between the arc-shaped protruding part 512 and the sidewall of the heating disc 20, and there can be a gap between the arc-shaped protruding part 512 and the sidewall of the pre-positioning ring 40 and the sidewall of the heating disc 20, so that the gap is filled with air, the heat transfer from the heating disc 20 to the pre-positioning ring 40 is reduced, the stability of the first glue in the pre-positioning ring 40 is ensured, and the aging rate is slowed down.

[0056] Specifically, in the embodiment, there is a gap between the arc-shaped protruding part 512 and the sidewall of the pre-positioning ring 40 and between the arc-shaped protruding part 512 and the sidewall of the heating disc 20, so that the heat transfer is reduced. Specifically, the width of the gap is 0.2mm-0.5mm, so that the distance between the arc-shaped protruding part 512 and the pre-positioning ring 40 and the distance between the arc-shaped protruding part 512 and the heating disc 20 are not too large, and the installation tightness between the various parts of the bottom part 12 of the whole kettle bottom 12 is not affected when the gap is too large, and the amount of heat transferred to the pre-positioning ring 40 is blocked when the gap is too small.

[0057] Understandably, when the first connecting flange 511 is connected with the pre-positioning ring 40, a plurality of first bolts are arranged between the first connecting flange 511 and the pre-positioning ring 40, so as to ensure the stability of the connection.

[0058] Embodiment two

[0059] Please refer to Figure 9 The heating kettle 100 provided by the second embodiment of the utility model has the same connection structure 50 connected between the pre-positioning ring 40 and the heating disc 20 as the first embodiment, and the connection structure 50 comprises an annular ring 51 and a connecting piece 52.

[0060] The difference is that the connecting piece 52 of the embodiment is a second glue, the annular ring 51 and the pre-positioning ring 40 are integrally arranged, and the annular ring 51 and the heating disc 20 are connected through the connecting piece 52, so that the pre-positioning ring 40 and the heating disc 20 are integrally connected through the second glue when the pre-positioning ring 40 and the heating disc 20 are installed on the kettle bottom 12, and then the pre-positioning ring 40 and the heating disc 20 are connected to the kettle bottom 12 through the glue on the pre-positioning ring 40, so as to realize the fixation of the pre-positioning ring 40 and the heating disc 20; finally, the bottom cover 60 can be fixed with the pre-positioning ring 40, or can be fixed with the heating disc 20, or can be fixed with the pre-positioning ring 40 and the heating disc 20 respectively, that is, the installation of the bottom cover 60 can be realized.

[0061] Embodiment three

[0062] Further, the heating kettle 100 of the present embodiment and the heating kettle of the first embodiment have the same point that the connecting structure 50 is connected between the pre-positioning ring 40 and the heating disc 20, and the connecting structure 50 comprises the annular ring 51 and the connecting member 52.

[0063] The difference lies in that the annular ring 51 is connected with the pre-positioning ring 40 and the heating disc 20 through the connecting member 52 respectively, that is, at this time, the connecting member 52 can be a glue or a first bolt, that is, the annular ring 51 and the pre-positioning ring 40 are connected through the first bolt, and the heating disc 20 and the annular ring 51 are also connected through the first bolt; or the annular ring 51 and the pre-positioning ring 40 are connected through the second glue, and the annular ring 51 and the heating disc 20 are also connected through the second glue; or one of the annular ring 51, the pre-positioning ring 40 and the heating disc 20 is connected through the second glue, and the other is connected through the first bolt, and both can realize the fixation of the heating disc 20 through the annular ring 51.

[0064] Embodiment Four

[0065] Please refer to Figure 10 The heating kettle 100 of the present embodiment and the heating kettle 100 of the first embodiment have the same point that the connecting structure 50 is connected between the pre-positioning ring 40 and the heating disc 20, and the connecting structure 50 comprises the annular ring 51 and the connecting member 52.

[0066] The difference lies in that the connecting structure 50 of the present embodiment comprises a plurality of connection pieces 55 arranged in a spaced manner and a plurality of connecting members 52, and the plurality of connection pieces 55 are arranged along the circumference of the heating disc 20, and each connection piece 55 is connected with the pre-positioning ring 40 and the heating disc 20 through the connecting member 52, wherein the connecting member 52 of the present embodiment can be a third glue or a third bolt, for example, the connection piece 55 can be connected with the pre-positioning ring 40 and the heating disc 20 through the third bolt respectively; or each connection piece 55 is connected with the pre-positioning ring 40 and the heating disc 20 through the third glue, which can realize the fixation of the heating disc 20; the connecting structure 50 in the present embodiment is arranged in the form of a plurality of connection pieces, which is smaller than the structure of each connection piece 55, and is convenient for the molding of each connection piece 55.

[0067] At this time, the connection piece 55 of the present embodiment can be a code or a hardware piece.

[0068] Embodiment Five

[0069] Please refer to Figure 11 The connecting structure 50 in the present embodiment is different from the connecting structure 50 in the first embodiment, and the connecting structure 50 is connected between the heating disc 20, the pre-positioning ring 40 and the bottom cover 60.

[0070] The connecting structure 50 comprises an elastic piece 53 and a second bolt 54, the elastic piece 53 is abutted between the heating disc 20 and the bottom cover 60, the second bolt 54 is connected with the bottom cover 60 and the pre-positioning ring 40 respectively, that is, when the pre-positioning ring 40 and the heating disc 20 are installed, the kettle body 11 is in an inverted state, the pre-positioning ring 40 and the kettle bottom 12 are glued and pre-fixed, the elastic piece 53 is placed on the heating disc 20, the bottom cover 60 is covered on the heating disc 20 and the pre-positioning ring 40, at the same time, the elastic piece 53 is also abutted on the bottom cover 60, finally, the second bolt 54 is screwed on the bottom cover 60 and the pre-positioning ring 40, so that the bottom cover 60, the pre-positioning ring 40 and the heating disc 20 are fixed.

[0071] The bottom cover 60 is provided with an abutting column 61 abutting with the elastic piece 53 and a connecting column 62 connected with the second bolt 54.

[0072] It can be understood that the connecting structure 50 of the embodiment can also comprise the annular ring 51 as in the first embodiment, and the second bolt 54 can fix the bottom cover 60, the pre-positioning ring 40 and the annular ring 51.

[0073] The technical means disclosed in the utility model scheme is not only limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical scheme composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. A heating kettle (100) characterized by, The kettle (100) comprises: a kettle body (10) having a kettle bottom (12) with a mounting surface (14); a heating disc (20) arranged at the bottom of the kettle bottom (12) and having a fitting surface (21) connected to the mounting surface (14); a pre-positioning ring (40) connected to the kettle bottom (12) and surrounding the heating disc (20); a bottom cover (60) arranged at the bottom of the kettle bottom (12) and covering the heating disc (20) and the pre-positioning ring (40); and a connecting structure (50) connected between the heating disc (20) and the pre-positioning ring (40), or connected between the heating disc (20), the pre-positioning ring (40) and the bottom cover (60).

2. The heating kettle (100) according to claim 1, characterized in that, The pre-positioning ring (40) or the kettle bottom (12) is provided with a glue groove (41) on the side facing the other.

3. The kettle (100) according to claim 1 or 2, wherein: the connecting structure (50) is connected between the pre-positioning ring (40) and the heating disc (20), and the connecting structure (50) comprises an annular ring (51) and a connecting piece (52); wherein the annular ring (51) is connected to the pre-positioning ring (40) through the connecting piece (52), and the annular ring (51) abuts against the heating disc (20); or the annular ring (51) and the pre-positioning ring (40) are integrally arranged, and the annular ring (51) is connected to the heating disc (20) through the connecting piece (52); or the annular ring (51) is connected to the pre-positioning ring (40) and the heating disc (20) through the connecting piece (52) respectively.

4. The kettle (100) according to claim 3, wherein: the connecting piece (52) is a second adhesive and / or a first bolt.

5. The kettle (100) according to claim 4, wherein: the annular ring (51) is connected to the pre-positioning ring (40) through the first bolt, and the annular ring (51) abuts against the heating disc (20); the annular ring (51) comprises a first connecting flange (511), an arc-shaped protruding portion (512) and a second connecting flange (513) connected in sequence, the first connecting flange (511) is connected to the pre-positioning ring (40) through the first bolt, the pre-positioning ring (40) and the heating disc (20) have a gap, the arc-shaped protruding portion (512) is arranged in the gap, and the second connecting flange (513) abuts against the heating disc (20).

6. The heating kettle (100) according to claim 5, characterized in that The pre-positioning ring (40) further comprises an extension wall (514) extending along the axial direction of the kettle body (10) and extending away from the kettle bottom (12), the extension wall (514) being connected between the first connecting flange (511) and the arc-shaped protruding portion (512), the pre-positioning ring (40) being provided with a positioning column (42), the positioning column (42) being connected by the first bolt and the first connecting flange (511).

7. The heating kettle (100) according to claim 5 or 6, characterized in that At least one of a gap exists between the arc-shaped protruding portion (512) and the sidewall of the pre-positioning ring (40) or between the arc-shaped protruding portion (512) and the sidewall of the heating disc (20).

8. The heating kettle (100) according to claim 7, characterized in that The gap ranges from 0.2 mm to 0.5 mm.

9. The heating kettle (100) according to claim 1 or 2, characterized in that, the connecting structure (50) is connected between the pre-positioning ring (40) and the heating disc (20); the connecting structure (50) comprises a plurality of connecting pieces (55) arranged in a spaced manner and a plurality of connecting members (52), the plurality of connecting pieces (55) being arranged along the circumferential direction of the heating disc (20), each of the connecting pieces (55) being connected to the pre-positioning ring (40) and the heating disc (20) by the connecting members (52).

10. The heating kettle (100) according to claim 1 or 2, characterized in that, the connecting structure (50) is connected between the heating disc (20), the pre-positioning ring (40) and the bottom cover (60); the connecting structure (50) comprises an elastic member (53) and a second bolt (54), the elastic member (53) abutting between the heating disc (20) and the bottom cover (60), the second bolt (54) being connected to the bottom cover (60) and the pre-positioning ring (40) respectively.

Images