CN220937683U - Liquid heater - Google Patents

Abstract

The utility model relates to the field of small household appliances, in particular to a liquid heater. The electric kettle comprises a kettle body assembly and a power supply base, wherein the kettle body assembly comprises a kettle body with an inner container and a bottom cover arranged at the bottom of the kettle body, a motor is arranged on the kettle body assembly, the motor body is arranged in an installation cavity, a stirring piece is arranged at the upper end of a motor shaft, a support is arranged at the lower end of a heating plate, the motor body is fixed at the lower end of the support, the motor shaft penetrates through the support upwards, an upper limiting rib extending downwards is arranged on the support, a lower limiting rib extending upwards is arranged on the bottom cover, the upper limiting rib and the lower limiting rib are all arranged around the outer side surface of the motor body, the upper end of the motor body is surrounded by the upper limiting rib, and the lower end of the motor body is surrounded by the lower limiting rib. The utility model provides an electric kettle, which utilizes a bracket and a bottom cover on a kettle body assembly to limit a motor, prevents the motor from deviating caused by motor vibration, ensures the stable working state of a stirring piece on a motor shaft, and prevents the stirring piece from rubbing a heating disc to generate abnormal sound.

Description

Liquid heater

Technical Field

The utility model relates to the field of small household appliances, in particular to a liquid heater.

Background

With the improvement of the living standard of people, the market demands of liquid heaters such as electric kettles and the like are also increased, and the electric kettles not only can be used for boiling water, but also can be used for boiling tea, stewing soup, boiling rice gruel and the like. The existing electric kettle has the phenomena of insufficient viscosity, paste bottom, layering and the like of foods such as rice porridge, and the like, and the problems of insufficient viscosity, paste bottom, layering and the like can be solved by adding the stirring function.

Some patents provide a stirring health preserving kettle with a lower power supply base of a motor, such as a Chinese patent grant publication No. CN215583857U and a patent named as a stirring health preserving kettle, an upper coupler and a lower coupler with holes in the center are used for placing parts such as a motor shaft, a stirring shaft, a connecting head and the like, so that torque transmission of the motor to the stirring shaft is realized. The disadvantage of this patent lies in: the motor is under the lower coupler, so that the risk of water inflow is high, the motor shaft is exposed, and the risk of electric shock is high after water inflow of the motor.

Therefore, in some patents, the motor is arranged below the heating plate, such as the Chinese patent grant bulletin No. CN215583857U, the name of the stirring health preserving kettle, the Chinese patent grant bulletin No. CN209074202U, the name of the liquid heating container all disclose that the motor is arranged on the kettle body assembly, but the motor works to generate vibration, the vibration can lead to the deviation of the motor, the position is unstable, thereby leading to the unstable working state of the stirring piece on the motor shaft, and even the friction heating plate gives out abnormal sound.

Disclosure of utility model

Aiming at the defects that in the existing electric kettle, a motor arranged in a kettle body component generates vibration during working, the vibration can lead to the deviation of the motor and unstable position, so that the working state of a stirring piece on a motor shaft is unstable, and even a friction heating disc emits abnormal sound, the utility model aims to provide a liquid heater.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a liquid heater, includes kettle body subassembly, power supply base, and kettle body subassembly is including the kettle body that has the inner bag and establish the bottom in kettle body bottom, is equipped with the motor on the kettle body subassembly, and the motor includes motor body and motor shaft, forms the installation cavity between kettle body and the bottom, and the motor body is established in the installation cavity, and the motor shaft upwards passes the dish that generates heat of inner bag bottom and stretches into in the inner bag, and the stirring piece is installed to the upper end of motor shaft, the lower extreme that generates heat the dish is equipped with the support, and the motor body is fixed at the lower extreme of support, and the motor shaft upwards passes the support, is equipped with the upper limit muscle of downwardly extending on the support, is equipped with the lower limit muscle of upwardly extending on the bottom, and upper limit muscle, lower limit muscle all are arranged around the lateral surface of motor body, and upper limit muscle surrounds the upper end of motor body, and lower limit muscle surrounds the lower extreme of motor body.

In this technical scheme, the liquid heater comprises dish that generates heat, the kettle body, a support, the motor, stirring spare and bottom etc. be equipped with the support between dish that generates heat and the bottom, form a cavity as the installation cavity between kettle body and the bottom, the motor shaft passes the support from bottom to top and generates heat the dish, the stirring spare is installed in the motor shaft upper end, thereby the stirring spare is located the dish top that generates heat, the motor body is located the support below, the upper end of motor body is surrounded to the upper end of downwardly extending on the support, it is spacing to carry out the upper end of motor body to the upper end of motor body, the lower extreme of motor body is surrounded to the lower spacing muscle of upwardly extending on the bottom lid, it is spacing wherein to surround the motor body to go on spacing muscle down, make the structure of motor firm, play the absorbing effect, prevent that motor vibrations from leading to the motor off normal position, guarantee that stirring spare operating condition on the motor shaft is stable, prevent stirring spare friction generates heat and the dish from sending abnormal sound. The spacing muscle exists certain height, if lower spacing muscle is the round and encloses the muscle, still has the manger plate effect when there is water bottom the bottom.

The utility model is further arranged to: the support is provided with a mounting hole, the lower end of the heating plate is provided with a mounting column, the support is fixed on the heating plate through a fastener penetrating through the mounting hole and the mounting column, the upper end of the support is provided with an upwards extending stop rib, the stop rib is positioned on one side of the mounting hole in the horizontal direction, and the upper end of the stop rib is pressed against the lower end face of the heating plate. Through this setting, circumference equipartition has the mounting hole on the support, and there is a stop muscle in every mounting hole outside. During assembly, the stop rib can be limited with the mounting column at the lower end of the heating plate, so that the assembly efficiency is improved, and the support is prevented from being offset in the horizontal direction. During assembly, the stop rib is attached to the plane of the heating plate, a gap is reserved between the upper surface of the mounting hole and the top surface of the mounting column of the heating plate and is tightly clamped, the design can ensure that the support is parallel to the heating plate, further ensure that the motor shaft is perpendicular to the heating plate, reduce the perpendicularity tolerance of the motor shaft and the plane of the heating plate, and prevent abnormal rotation of the blade of the stirring piece, which causes abnormal noise and abrasion of the heating plate, from the friction heating plate due to the large perpendicularity tolerance of the motor shaft and the heating plate when the stirring piece rotates.

The utility model is further arranged to: the upper end face of the motor body is attached to the lower end face of the support, and the motor shaft is perpendicular to the support. The upper end face laminating of motor body is on the lower terminal surface of support, spacing motor body can guarantee that motor body is parallel with the support, the motor shaft of motor inside is perpendicular to motor body up end, so motor shaft perpendicular to support, the last stop muscle of support is laminated with the dish plane that generates heat, support plane is parallel with the dish plane that generates heat, guarantee motor shaft perpendicular to dish that generates heat, when reducing the axiality of motor shaft and dish that generates heat, reduce motor shaft and the planar straightness tolerance that generates heat of dish, the motor shaft is docked with the (mixing) shaft of stirring piece, guarantee (mixing) shaft perpendicular to dish that generates heat.

The utility model is further arranged to: the motor shaft is arranged at the center of the heating plate, an upper coupler is further arranged in the mounting cavity, a heating tube with an opening end is arranged on the heating plate, a cold end is formed at the opening end of the heating tube, the motor body and the upper coupler are arranged left and right on the horizontal space, the motor body is biased to one side of the cold end, and the upper coupler is biased to the other side opposite to the cold end. The motor body is biased to one side of the cold end of the heating plate in the horizontal space, namely the opening end of the heating tube, and the upper coupler is arranged on the other side of the cold end, the motor body and the upper coupler are arranged left and right on the horizontal space, and the motor body and the motor shaft are eccentrically arranged. The motor body is biased to one side of the cold end, the temperature of the motor body is reduced, abnormal operation of the motor is prevented, the service life is shortened, and the upper coupler is fixed on the bottom cover through screws.

The utility model is further arranged to: the edge of one side of the support opposite to the cold end is provided with a first folding edge, the height of the first folding edge is lower than that of the support, the first folding edge is connected with the bottom cover, and the first folding edge is positioned between the heating tube and the upper coupler. Through this setting, support lower surface outside downwardly distributed has first hem, and first hem setting is equipped with the screw post on one side edge opposite with the cold junction for be connected with the bottom. The position of the first folding edge can avoid the position of the heating tube, the longitudinal height of the whole machine is reduced, and the first folding edge on one side is positioned above the upper coupler and used for blocking heat of the heating tube from being transferred to the upper coupler, so that the upper coupler is thermally insulated.

The utility model is further arranged to: the edge of one side of the bracket, which is deviated to the cold end, is provided with a second folded edge, the second folded edge is connected with the bottom cover, and the second folded edge is used as an upper limit rib to limit the upper end of the motor body. Through this setting, the second flange of support opposite side is located cold junction one side of heating tube, encloses into circular region with the circular arc muscle below the support and is used for spacing motor body, reduces the axiality of motor shaft and support, further reduces the axiality of motor shaft and heating plate. Screw columns for fixing the bottom cover are arranged on the first folding edge and the second folding edge. The bracket is provided with a screw hole for fixing the motor.

The utility model is further arranged to: the support is characterized in that a pressing plate is arranged on one side, which is deviated to the cold end, of the support, an opening groove is formed in the pressing plate, a temperature sensor is placed in the opening groove, and when the support is fixed on the heating plate, the pressing plate presses the temperature sensor against the heating plate. Through this setting, support deflection cold junction one side is equipped with the clamp plate, has the open slot in the middle of the clamp plate, places temperature sensor in the inslot, and when support and dish that generates heat were fastened fixedly, the clamp plate can compress tightly temperature sensor on the dish that generates heat to fixed temperature sensor. The design can omit a part for fixing the temperature sensor, and reduce the cost.

The utility model is further arranged to: and one side of the support, which is opposite to the cold end, is provided with an avoidance hole, and the avoidance hole is used for avoiding the mounting structure of the thermal cut-off on the heating disc. Through this setting, the support is kept away from the cold junction of dish that generates heat one side has and opens has dodges the hole, is fixed with the thermal cut-off on the dish that generates heat, and this hole is used for avoiding the mounting structure of fixed thermal cut-off for complete machine compact structure.

The utility model is further arranged to: the support is provided with an upward protruding lower step, the heating plate is provided with an upward protruding upper step, the motor shaft is sleeved with a sealing ring, the sealing ring is pressed between the lower end face of the upper step and the upper end face of the lower step, and the motor shaft sequentially penetrates through the lower step and the upper step from bottom to top. Through this setting, there is an upward convex lower step in the middle of the support for compress tightly the sealing washer, the external diameter of lower step is greater than the biggest external diameter of sealing washer, and the aperture of lower step is greater than the diameter of motor shaft, is less than the outside supporting part internal diameter of sealing washer. The design can ensure that the support pressing sealing ring is stable and reliable. The upper step protruding upwards is arranged in the middle of the heating disc, so that the strength of the end face matched with the sealing ring can be enhanced, and water sealing failure caused by middle deformation of the heating disc is avoided.

The utility model is further arranged to: the upper end face of the sealing ring is sealed with the lower end face of the heating disc through a first sealing rib on the sealing ring, and the inner side face of the sealing ring is sealed with the outer side face of the motor shaft through a second sealing rib on the sealing ring. Through this setting, when support and dish that generates heat tighten, the sealing washer has certain interference with the dish that generates heat, guarantees to generate heat the steel dish department of dish and leak. Further, the inner surface of the sealing ring is provided with a ring rib which is in interference with the motor shaft, so that the motor shaft is ensured to be watertight. Further, a horizontal gap is reserved between the outer side of the sealing ring and the bulge of the heating disc steel disc, namely the sealing ring is sleeved on the motor shaft, and is deviated along with the motor shaft during assembly, so that the interference magnitude between the outer side of the motor shaft and the inner side of the sealing ring is uniform, and the situation that one side is interference magnitude, multiple abrasion and multiple water leakage are caused is avoided. Further, the diameter of the opening of the heating plate aluminum plate is larger than the outer diameter of the step of the support, and the design can ensure that the heating plate aluminum plate can avoid the support when the motor assembly position is deviated.

The utility model has the advantages that: (1) The motor body is limited by the support and the bottom cover, so that the coaxiality of the motor shaft and the heating disc is reduced, and the water inlet risk of the motor is reduced; (2) The upper limit rib and the lower limit rib surround the motor body to limit, so that the motor is stable in structure, the coaxiality of a motor shaft and a bracket is reduced, the plane of the bracket is parallel to the plane of the heating plate, and the coaxiality of the motor shaft and the heating plate is further reduced; (3) The upper end face of the motor body is attached to the lower end face of the support, the motor body is enabled to be parallel to the support, the motor shaft inside the motor is perpendicular to the upper end face of the motor body, so that the motor shaft is perpendicular to the support, the stop rib on the support is attached to the plane of the heating plate, the plane of the support is parallel to the plane of the heating plate, the motor shaft is enabled to be perpendicular to the heating plate, and when the coaxiality of the motor shaft and the heating plate is reduced, the perpendicularity tolerance of the motor shaft and the plane of the heating plate is reduced.

Drawings

FIG. 1 is a split view of a kettle body assembly according to one embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a liquid heater in accordance with one embodiment of the present utility model;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is another angular cross-sectional view of a liquid heater in one embodiment of the utility model;

FIG. 6 is an enlarged view at C in FIG. 5;

FIG. 7 is a schematic view showing the structure of the upper surface of the bracket according to an embodiment of the present utility model;

FIG. 8 is a schematic view showing the structure of the lower surface of the bracket according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a heat-generating plate according to an embodiment of the present utility model;

FIG. 10 is a schematic view of the structure of the bottom cover according to an embodiment of the present utility model;

fig. 11 is a split view of a liquid heater in one embodiment of the utility model.

Reference numerals: kettle body assembly 100, kettle body 110, liner 111, bottom cover 120, lower spacing rib 121, motor 130, motor body 131, motor shaft 132, mounting cavity 140, power base 200, heat generating plate 300, mounting post 301, heat generating tube 302, thermal cut-off 303, upper step 304, cold end 305, mounting structure 306, stirring piece 400, bracket 500, upper spacing rib 501, mounting hole 502, stop rib 503, first flange 504, second flange 505, lower step 506, circular arc rib 507, screw post 508, screw hole 509, pressure plate 510, open slot 511, temperature sensor 512, upper coupler 600, sealing ring 700, first sealing rib 701, second sealing rib 702.

Detailed Description

In the description of the present embodiment, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like are presented, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.

The utility model is further described below with reference to the drawings and specific examples.

Referring to fig. 1 to 11, a liquid heater in an embodiment of the present utility model includes a body assembly 100 and a power base 200, the body assembly 100 includes a body 110 having a liner 111 and a bottom cover 120 provided at the bottom of the body 110, a motor 130 is provided on the body assembly 100, the motor 130 includes a motor body 131 and a motor shaft 132, a mounting cavity 140 is formed between the body 110 and the bottom cover 120, the motor body 131 is provided in the mounting cavity 140, the motor shaft 132 passes through a heating plate 300 at the bottom of the liner 111 upwards and extends into the liner, a stirring member 400 is mounted at the upper end of the motor shaft 132, a bracket 500 is provided at the lower end of the heating plate 300, the motor body 131 is fixed at the lower end of the bracket 500, the motor shaft 132 passes through the bracket 500 upwards, an upper limit rib 501 extending downwards is provided on the bracket 500, a lower limit rib 121 extending upwards is provided on the bottom cover 120, the upper limit rib 501 and the lower limit rib 121 are all arranged around the outer side of the motor body 131, the upper limit rib 501 surrounds the upper end of the motor body 131, and the lower limit rib 121 surrounds the lower end of the motor body 131.

In this embodiment, in this technical solution, the liquid heater is composed of a heating plate 300, a kettle body 110, a support 500, a motor 130, a stirring member 400, a bottom cover 120 and the like, the support is disposed between the heating plate 300 and the bottom cover 120, a cavity is formed between the kettle body 110 and the bottom cover 120 as a mounting cavity 140, a motor shaft 132 passes through the support 500 and the heating plate 300 from bottom to top, the stirring member 400 is mounted at the upper end of the motor shaft 132, so that the stirring member 400 is located above the heating plate 300, the motor body 131 is located below the support 500, an upper limit rib 501 extending downwards on the support 500 surrounds the upper end of the motor body 131, the upper end of the motor body 131 is limited, a lower limit rib 121 extending upwards on the bottom cover 120 surrounds the lower end of the motor body 131, the lower end of the motor body 131 is limited, the upper limit rib 501 and the lower limit rib 121 surround the motor body 131, so that the motor 130 is structurally stable, a vibration absorbing effect is achieved, the vibration is prevented from causing the motor to deviate and be unstable in position, and the coaxiality error of the motor shaft 132 and the stirring member 400 is reduced, the coaxiality error of the motor shaft 132 and the stirring member 400 is ensured, and the lower limit rib 121 has a height of 5mm if the lower limit rib 121 is greater than the limit rib 121 mm.

It can be understood that the liquid heater is a health preserving kettle, and the permanent magnet synchronous motor is selected because the actual use of the health preserving kettle for stirring is to stir rice porridge, tremella soup and mung bean Sha Dengnian thick food, so that low-speed and large torque is required.

It can be appreciated that the kettle body 110 has a liner 111, which may be formed inside the kettle body 110 itself; the inner container 111 may be further disposed in the outer shell of the kettle body 110, that is, the kettle body 110 and the inner container 111 are separately disposed.

In one embodiment of the present utility model, referring to fig. 2, 3, 6, 7 and 9, in order to reduce the perpendicularity tolerance between the motor shaft 132 and the plane of the heat generating plate 300, a mounting hole 502 is formed in the bracket 500, a mounting post 301 is formed at the lower end of the heat generating plate 300, the bracket 500 is fixed to the heat generating plate 300 by a fastener penetrating through the mounting hole 502 and the mounting post 301, an upwardly extending stop rib 503 is formed at the upper end of the bracket 500, the stop rib 503 is located at one side of the mounting hole 502 in the horizontal direction, and the upper end of the stop rib 503 is pressed against the lower end surface of the heat generating plate 300. Mounting holes 502 are circumferentially distributed on the bracket 500, and a stop rib 503 is arranged outside each mounting hole 502. During assembly, the stop rib 503 can limit the mounting column 301 at the lower end of the heating plate, which is beneficial to improving the assembly efficiency and preventing the support 500 from shifting in the horizontal direction. During assembly, the stop rib 503 is attached to the plane of the heating plate 300, a gap a is reserved between the upper surface of the mounting hole 502 and the top surface of the mounting column 301 of the heating plate, the gap a is larger than 0.5mm, and the mounting hole is tightly fastened, so that the support 500 and the heating plate 300 can be kept parallel, the motor shaft 132 is further ensured to be perpendicular to the heating plate 300, the perpendicularity tolerance of the motor shaft 132 and the plane of the heating plate 300 is reduced, and the abnormal rotation of the blades of the stirring piece 400, which is caused by the large perpendicularity tolerance of the motor shaft 132 and the heating plate 300, can be prevented from generating abnormal noise and wearing the heating plate 300 when the stirring piece 400 rotates.

Preferably, the number of the mounting holes 502, the mounting posts 301 and the stop ribs 503 is three, so that the connection structure between the bracket 500 and the heating plate 300 is stable.

In one embodiment of the present utility model, referring to fig. 1 and 2, in order to reduce the perpendicularity tolerance of the motor shaft 132 and the plane of the heat generating plate 300, the upper end surface of the motor body 131 is attached to the lower end surface of the bracket 500, and the motor shaft 132 is installed perpendicular to the bracket 500. The up end laminating of motor body 131 is on the lower terminal surface of support 500, the laminating of motor body 131 lower terminal surface is in the bottom of bottom, motor body 131 up and down terminal surfaces are restricted between panel and bottom, restrict the vertical position of motor body 131, make motor 130's structure firm, play the absorbing effect, prevent motor 130 during operation and produce vibrations and can lead to the motor to deviate from, the position is unstable, guarantee motor body and support parallel, motor 130 inside motor shaft 132 perpendicular to motor body 131 up end, so motor shaft 132 perpendicular to support 500, stop rib 503 on the support 500 and the laminating of dish 300 that generates heat, support 500 plane and dish 300 that generates heat are parallel, guarantee motor shaft 132 perpendicular to dish 300 that generates heat, reduce motor shaft 132 and the planar straightness tolerance of dish 300 that generates heat when reducing the axiality of dish 300, motor shaft 132 and stirring axle butt joint of stirring piece 400, guarantee that the stirring axle is perpendicular to dish 300 that generates heat.

In one embodiment of the present utility model, referring to fig. 2, in order to lower the temperature of the motor body 131, the motor shaft 132 is disposed at the center of the heat generating plate 300, the installation cavity 140 is further provided with an upper coupler 600, the heat generating plate 300 is provided with a heat generating tube 302 having an open end, the open end of the heat generating tube 302 forms a cold end 305, the motor body 131 and the upper coupler 600 are disposed left and right in a horizontal space, the motor body 131 is biased to one side of the cold end 305, and the upper coupler 600 is biased to the other side opposite to the cold end 305. The motor body 131 is biased to one side of the cold end 305 of the heating plate 300 in the horizontal space, the cold end 305 is the opening end of the heating tube 302, the upper coupler 600 is arranged on the other side, the motor body 131 and the upper coupler 600 are arranged left and right in the horizontal space, and the motor body 131 and the motor shaft 132 are eccentrically arranged. The motor body 131 is biased to one side of the cold end 305, the temperature of the motor body 131 is reduced, the abnormal operation of the motor 130 is prevented, the service life is shortened, and the upper coupler 600 is screw-fixed on the bottom cover 120.

In one embodiment of the present utility model, referring to fig. 2, 4, 8, and 10, in order to block heat of the heating tube 302 from being transferred to the upper coupler 600, an edge of the bracket 500 opposite to the cold end 305 has a first folded edge 504, the first folded edge 504 has a height lower than that of the bracket 500, the first folded edge 504 is connected to the bottom cover 120, and the first folded edge 504 is located between the heating tube 302 and the upper coupler 600. The outer side of the lower surface of the bracket 500 is provided with a first folded edge 504, the first folded edge 504 is arranged at the edge of one side opposite to the cold end 305, and a screw column 508 is arranged on the first folded edge 504 and is used for being connected with the bottom cover. The first folded edge 504 can avoid the heat pipe 302, reduce the longitudinal height of the whole machine, and the first folded edge 504 on one side is located above the upper coupler 600 to block the heat of the heat pipe 302 from being transferred to the upper coupler 600, thereby playing a role in heat insulation of the upper coupler 600.

Preferably, the number of first folds is one.

In one embodiment of the present utility model, referring to fig. 2, 4, 8 and 9, in order to further reduce the coaxiality of the motor shaft 132 and the heat generating plate 300, a second flange 505 is provided on an edge of the bracket 500, which is biased toward the cold end 305, the second flange 505 is connected to the bottom cover 120, and the second flange 505 serves as an upper limit rib 501 to limit the upper end of the motor body 131. The second flange 505 on the other side of the bracket 500 is located on one side of the cold end 305 of the heating tube 300, and encloses a circular area with the circular arc rib 507 under the bracket 500 to limit the motor body 131, so that the coaxiality of the motor shaft 132 and the bracket 500 is reduced, and the coaxiality of the motor shaft 132 and the heating plate 300 is further reduced.

Preferably, the number of the second folds is two, and the two circular arc ribs are matched with each other, so that the effect of the limiting motor body 131 is better, and the structure is stable.

Preferably, the first flange 504 and the second flange 505 are provided with four screw posts 508 for fixing the bottom cover 120. The bracket 500 is provided with four screw holes 509 for fixing the motor 130.

In one embodiment of the present utility model, referring to fig. 4, 5 and 8, in order to simplify the structure of fixing the temperature sensor 512, a pressing plate 510 is provided on the bracket 500 at a side biased toward the cold end 305, an open slot 511 is provided on the pressing plate 510, the temperature sensor 512 is placed in the open slot 511, and when the bracket 500 is fixed on the heat generating plate 300, the pressing plate 510 presses the temperature sensor 512 against the heat generating plate 300. The support 500 is provided with a pressing plate 510 at one side which is deviated to the cold end 305, an opening groove 511 is formed in the middle of the pressing plate 510, and a temperature sensor 512 is placed in the groove, when the support 500 is tightly fastened and fixed with the heating plate 300, the pressing plate 510 can tightly press the temperature sensor 512 on the heating plate 300, so that the temperature sensor 512 is fixed. This design eliminates the need for a separate part for the fixed temperature sensor 512, reducing costs.

In one embodiment of the present utility model, referring to fig. 4, 5 and 8, in order to make the whole machine compact, a dodging hole 520 is provided on a side of the bracket 500 opposite to the cold end, and the dodging hole 520 is used for dodging the mounting structure 306 of the thermal cutter 303 on the heating plate 300. The side of the bracket 500 far away from the cold end 305 of the heating plate 300 is provided with a avoidance hole 520, and the heating plate 300 is fixed with a thermal cutter 303, and the hole is used for avoiding the mounting structure 306 for fixing the thermal cutter 303, so that the whole machine has a compact structure.

In another embodiment of the present utility model, the thermal breakers 303 on the heat plate 300 may be individually secured to the heat pipes 302 by a press sheet.

In an embodiment of the present utility model, referring to fig. 4, 5 and 8, in order to make the support 500 press the sealing ring 700 stable and reliable, the support 500 is provided with a lower step 506 protruding upwards, the heating plate 300 is provided with an upper step 304 protruding upwards, the motor shaft 132 is sleeved with a sealing ring 700, the sealing ring 700 is pressed between the lower end surface of the upper step 304 and the upper end surface of the lower step 506, and the motor shaft 132 sequentially passes through the lower step 506 and the upper step 304 from bottom to top. The middle of the bracket 500 is provided with a lower step 506 protruding upwards for pressing the sealing ring 700, the outer diameter c of the lower step 506 is larger than the maximum outer diameter v of the sealing ring 700, the aperture n of the lower step 506 is larger than the diameter d of the motor shaft 132 and smaller than the inner diameter of the outer supporting part of the sealing ring 700. This design may make the bracket 500 secure and reliable against the seal ring 700. The upper step 304 protruding upwards is arranged in the middle of the heating plate 300, so that the strength of the end surface matched with the sealing ring 700 can be enhanced, and the water sealing failure caused by the middle deformation of the heating plate 300 is avoided.

In one embodiment of the present utility model, referring to fig. 4, 5 and 8, in order to reduce water leakage, the upper end surface of the seal ring 700 is sealed with the lower end surface of the heat generating plate 300 by the first sealing rib 701 on the seal ring 700, and the inner side surface of the seal ring 700 is sealed with the outer side surface of the motor shaft 132 by the second sealing rib 702 on the seal ring 700. When the support 500 is tightly fastened with the heating plate 300, the sealing ring 700 and the heating plate 300 have certain interference, so that the steel plate of the heating plate 300 is free from water leakage. Further, the inner surface of the sealing ring 700 is provided with a ring rib which is in interference with the motor shaft 132, so that no water leakage at the motor shaft 132 is ensured. Further, a horizontal clearance a is reserved between the outer side of the sealing ring 700 and the steel disc bulge of the heating disc 300, namely, the sealing ring 700 is sleeved on the motor shaft 132, and is deviated along with the motor shaft 132 during assembly, so that the interference magnitude between the outer side of the motor shaft 132 and the inner side of the sealing ring 700 is uniform, and the situation that one side is interference magnitude, multiple abrasion and multiple water leakage are caused is avoided. Further, the opening diameter b of the aluminum plate of the heat generating plate 300 is larger than the outer diameter c of the step of the bracket 500, and the design ensures that the aluminum plate of the heat generating plate 300 can avoid the bracket 500 when the assembling position of the motor 130 is deviated.

Furthermore, the whole scheme considers the attractive appearance, and selects the arc coupler. Referring to fig. 1 and 11, the power supply base of the stirring health preserving kettle is provided with an arc lower coupler at a corresponding position, the arc surface of the lower coupler faces inwards (the center), and a water leakage hole is formed in the middle of the lower coupler and used for discharging water overflowing from the base panel in the use process.

The foregoing embodiments are provided for further explanation of the present utility model and are not to be construed as limiting the scope of the present utility model, and some insubstantial modifications and variations of the present utility model, which are within the scope of the utility model, will be suggested to those skilled in the art in light of the foregoing teachings.

Claims (10)

1. The utility model provides a liquid heater, includes kettle body subassembly, power supply base, and kettle body subassembly is equipped with the motor including the kettle body that has the inner bag and establish in the bottom of the kettle body bottom on the kettle body subassembly, and the motor includes motor body and motor shaft, forms the installation cavity between kettle body and the bottom, and motor body establishes in the installation cavity, and the motor shaft upwards passes the dish that generates heat of inner bag bottom and stretches into in the inner bag, and the stirring piece is installed to the upper end of motor shaft, its characterized in that: the lower extreme of dish generates heat is equipped with the support, and motor body fixes the lower extreme at the support, and the motor shaft upwards passes the support, is equipped with the last spacing muscle of downwardly extending on the support, is equipped with the lower spacing muscle of upwardly extending on the bottom, goes up spacing muscle, lower spacing muscle and all arranges around motor body's lateral surface, goes up spacing muscle and encircles motor body's upper end, and lower spacing muscle encircles motor body's lower extreme.

2. A liquid heater as claimed in claim 1, wherein: the support is provided with a mounting hole, the lower end of the heating plate is provided with a mounting column, the support is fixed on the heating plate through a fastener penetrating through the mounting hole and the mounting column, the upper end of the support is provided with an upwards extending stop rib, the stop rib is positioned on one side of the mounting hole in the horizontal direction, and the upper end of the stop rib is pressed against the lower end face of the heating plate.

3. A liquid heater as claimed in claim 1, wherein: the upper end face of the motor body is attached to the lower end face of the support, and the motor shaft is perpendicular to the support.

4. A liquid heater as claimed in any one of claims 1 to 3, wherein: the motor shaft is arranged at the center of the heating plate, an upper coupler is further arranged in the mounting cavity, a heating tube with an opening end is arranged on the heating plate, a cold end is formed at the opening end of the heating tube, the motor body and the upper coupler are arranged left and right on the horizontal space, the motor body is biased to one side of the cold end, and the upper coupler is biased to the other side opposite to the cold end.

5. A liquid heater as claimed in claim 4, wherein: the edge of one side of the support opposite to the cold end is provided with a first folding edge, the height of the first folding edge is lower than that of the support, the first folding edge is connected with the bottom cover, and the first folding edge is positioned between the heating tube and the upper coupler.

6. A liquid heater as claimed in claim 4, wherein: the edge of one side of the bracket, which is deviated to the cold end, is provided with a second folded edge, the second folded edge is connected with the bottom cover, and the second folded edge is used as an upper limit rib to limit the upper end of the motor body.

7. A liquid heater as claimed in claim 4, wherein: the support is characterized in that a pressing plate is arranged on one side, which is deviated to the cold end, of the support, an opening groove is formed in the pressing plate, a temperature sensor is placed in the opening groove, and when the support is fixed on the heating plate, the pressing plate presses the temperature sensor against the heating plate.

8. A liquid heater as claimed in claim 4, wherein: and one side of the support, which is opposite to the cold end, is provided with an avoidance hole, and the avoidance hole is used for avoiding the mounting structure of the thermal cut-off on the heating disc.

9. A liquid heater as claimed in any one of claims 1 to 3, wherein: the support is provided with an upward protruding lower step, the heating plate is provided with an upward protruding upper step, the motor shaft is sleeved with a sealing ring, the sealing ring is pressed between the lower end face of the upper step and the upper end face of the lower step, and the motor shaft sequentially penetrates through the lower step and the upper step from bottom to top.

10. A liquid heater as claimed in claim 9, wherein: the upper end face of the sealing ring is sealed with the lower end face of the heating disc through a first sealing rib on the sealing ring, and the inner side face of the sealing ring is sealed with the outer side face of the motor shaft through a second sealing rib on the sealing ring.