Electric kettle

Abstract

The utility model discloses an electric kettle which comprises a kettle main body, a first heating piece and a vapor chamber, the vapor chamber is arranged in the kettle main body and comprises a first cover plate and a second cover plate, the second cover plate is arranged above the first cover plate, and the first cover plate and the second cover plate are in butt joint to form a vacuum cavity; the vacuum cavity is filled with heat transfer working media, the first cover plate is provided with an evaporation end, the second cover plate is provided with a condensation end, the evaporation end and the condensation end are oppositely arranged, and the end, away from the evaporation end, of the first cover plate is connected with the first heating piece. According to the electric kettle, the temperature of the bottom of the kettle body in the two-dimensional horizontal direction is quite uniform, so that boiling bubbles are generated more uniformly in the water boiling process of the electric kettle, and the problem that noise is too large due to the fact that a large number of bubbles are gathered is solved.

Description

Technical Field

[0001] The invention relates to the technical field of electric kettles, in particular to an electric kettle. Background Art

[0002] The electric kettle is a commonly used household appliance used to heat water or other liquids. The traditional electric kettle is generally composed of a kettle body, a kettle bottom plate and a heating element, wherein the heating element is generally composed of a resistance wire or an electric heating tube, etc., and its function is to convert electrical energy into thermal energy, thereby heating the water in the kettle body by heating the kettle bottom plate. However, the traditional electric kettle is generally heated by coupling the C-shaped heating device with the kettle bottom plate, so there is a problem of uneven heating, which can easily cause uneven temperature at the bottom of the kettle. The temperature of the part close to the C-shaped heating device is high, which can easily generate a large number of bubbles, resulting in violent generation of boiling bubbles and causing loud noise during the boiling process, affecting the user experience. Summary of the invention

[0003] Based on this, it is necessary to provide an electric kettle that can heat evenly and reduce noise.

[0004] An electric kettle, comprising:

[0005] The kettle body has an inner cavity formed therein, and the inner cavity is used to hold liquid;

[0006] A first heating element is arranged on the bottom wall of the kettle body;

[0007] A temperature equalizing plate is arranged inside the kettle body, the temperature equalizing plate includes a first cover plate and a second cover plate, the second cover plate is arranged above the first cover plate, the first cover plate and the second cover plate are connected to each other to form a vacuum chamber, the interior of the vacuum chamber is filled with a heat transfer medium, the first cover plate has an evaporation end, the second cover plate has a condensation end, the evaporation end and the condensation end are arranged opposite to each other, the end of the first cover plate away from the evaporation end is connected to the first heating element, the first heating element is used to heat the first cover plate so that the heat transfer medium is heated and evaporated from liquid to gas at the evaporation end and approaches the condensation end, the condensation end is used for condensing the heat transfer medium from gas to liquid, and the second cover plate is used to transfer the heat released by the condensation of the heat transfer medium to the inside of the kettle body to heat the liquid.

[0008] Optionally, the temperature equalizing plate also includes a first capillary structure and a second capillary structure, wherein the first capillary structure is arranged at the evaporation end, and the first capillary structure is used to store and gather the heat transfer medium, and the second capillary structure is arranged at the condensation end, and the second capillary structure is used for heat exchange and condensation between the evaporated heat transfer medium and the liquid, so that the evaporated heat transfer medium is condensed from gas to liquid.

[0009] Optionally, the first capillary structure includes a plurality of first capillary units and a plurality of second capillary units. The evaporation end includes a heating zone and a non-heating zone. The plurality of first capillary units are arranged at intervals in the heating zone, and the plurality of second capillary units are arranged at intervals in the non-heating zone. The distance between two adjacent first capillary units is smaller than the distance between two adjacent second capillary units.

[0010] Optionally, the heat pipe vapor chamber further includes support columns. The support columns are located in the vacuum chamber. One end of each support column is disposed on the evaporation end, and the other end of each support column is close to the condensation end. The support columns are used to support the first cover plate and the second cover plate, and are further used to guide the heat transfer working fluid condensed into a liquid state by the second capillary structure to the first capillary structure.

[0011] Optionally, the number of the support columns is plural, and the plurality of support columns are arranged at intervals between the first cover plate and the second cover plate.

[0012] Optionally, the heat pipe vapor chamber further includes a liquid injection port. The liquid injection port is disposed on the first cover plate or the second cover plate. The liquid injection port is used for the heat transfer working fluid to enter the vacuum chamber, and is further used for evacuating the vacuum chamber.

[0013] Optionally, the heat pipe vapor chamber further includes a temperature sensor. The temperature sensor is disposed at one end of the second cover plate away from the condensation end. The temperature sensor is used to detect the temperature of the liquid in the inner cavity.

[0014] Optionally, the electric kettle further includes a heat conducting plate. The heat conducting plate is disposed at one end of the second cover plate away from the condensation end. The heat conducting plate is used to be heated to heat the liquid accommodated inside the kettle body.

[0015] Optionally, the electric kettle further includes a second heating element. A receiving groove is formed in the middle of the first cover plate. The second heating element is disposed in the receiving groove and is located below the heat conducting plate. The second heating element is used to heat the heat conducting plate.

[0016] Optionally, the kettle body includes a kettle and a bottom plate. The bottom plate is disposed at the bottom of the kettle. The first heating element is disposed on the bottom plate. The heat pipe vapor chamber is located between the kettle and the heating element.

[0017] In the electric kettle of the present application, the first heating element heats the heat dissipation plate, causing the heat transfer medium in the vacuum chamber to evaporate from a liquid state to a gaseous state at the evaporation end. The gaseous heat transfer working medium flows to the condensation end, condenses into a liquid state, and releases heat into the liquid inside the kettle body, thereby realizing the heating of the liquid in the kettle body. The present application uses a heat dissipation plate to transfer heat through the phase change of the heat transfer working medium, which can quickly achieve the temperature uniformity effect at the bottom of the kettle body, making the temperature of the bottom of the kettle body very uniform in the two-dimensional horizontal direction. As a result, the bubbles generated during boiling in the electric kettle of the present application are more uniform, avoiding the problem of excessive noise caused by the aggregation of a large number of bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic structural diagram of an electric kettle in an embodiment;

[0020] Figure 2 It is a side view of an electric kettle in an embodiment;

[0021] Figure 3 It is a schematic structural diagram of a heat dissipation plate and a bottom plate in an embodiment;

[0022] Figure 4 It is a schematic structural diagram of a first cover plate in an embodiment;

[0023] Figure 5 It is a top view of a heat dissipation plate in an embodiment;

[0024] Figure 6 It is a schematic structural diagram of a second cover plate in an embodiment.

[0025] Component names and serial numbers in the figure: 1. Kettle body; 11. Inner cavity; 12. Kettle body; 13. Bottom plate; 14. Kettle lid; 15. Spout; 16. Handle; 17. Switch button; 2. First heating element; 3. Heat dissipation plate; 31. First cover plate; 311. Accommodation groove; 32. Second cover plate; 33. Evaporation end; 331. Heating area; 332. Non-heating area; 34. Condensation end; 35. First capillary structure; 351. First capillary unit; 352. Second capillary unit; 36. Second capillary structure; 37. Support column; 38. Liquid injection port; 39. Temperature sensor; 4. Heat conduction plate; 5. Second heating element.

[0026] The implementation, functional features, and advantages of the present invention will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution that A and B are satisfied at the same time. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0030] Reference Figures 1 to 4 And Figure 6, this application provides an electric kettle, which includes a kettle body 1, a first heating element 2 and a temperature equalizing plate 3. An inner cavity 11 is formed inside the kettle body 1 for containing liquid; the first heating element 2 is located inside the kettle body 1 and is arranged on the bottom wall of the kettle body 1; the temperature equalizing plate 3 is arranged inside the kettle body 1. The temperature equalizing plate 3 includes a first cover plate 31 and a second cover plate 32. The second cover plate 32 is arranged above the first cover plate 31. The first cover plate 31 and the second cover plate 32 are butted against each other to form a vacuum cavity, and a heat transfer working fluid is filled inside the vacuum cavity. The first cover plate 31 has an evaporation end 33, and the second cover plate 32 has a condensation end 34. The evaporation end 33 and the condensation end 34 are arranged opposite to each other. One end of the first cover plate 31 away from the evaporation end 33 is connected to the first heating element 2. The first heating element 2 is used to heat the first cover plate 31, so that the heat transfer working fluid evaporates from liquid state to gaseous state at the evaporation end 33 and approaches the condensation end 34. The condensation end 34 is used for the heat transfer working fluid to condense from gaseous state to liquid state, and the second cover plate 32 is used to transfer the heat released by the condensation of the heat transfer working fluid to the inside of the kettle body 1 to heat the liquid.

[0031] In the electric kettle of this application, the first heating element 2 heats the temperature equalizing plate 3, so that the heat transfer working fluid in the vacuum cavity evaporates from liquid state to gaseous state at the evaporation end 33. The gaseous heat transfer working fluid flows to the condensation end 34 and condenses into liquid state and releases heat to the liquid inside the kettle body 1, thereby realizing the heating of the liquid in the kettle body 1. This application uses the temperature equalizing plate 3 to transfer heat through the phase change of the heat transfer working fluid, which can quickly achieve the temperature equalizing effect at the bottom of the kettle body 1, making the temperature at the bottom of the kettle body 1 very uniform in the two-dimensional horizontal direction. As a result, the boiling bubbles generated during the boiling process of the electric kettle of this application are more uniform, avoiding the problem of excessive noise caused by the aggregation of a large number of bubbles.

[0032] Specifically, the noise during the boiling process of the electric kettle mainly comes from the subcooled boiling stage. When the water in the kettle is heated to above 50 °C, obvious noise will appear. At this time, the heating surface at the bottom of the kettle of the traditional electric kettle is locally high-temperature, and the activation energy reaches the requirement of the vaporization core. The water is heated and undergoes a phase change to form a large number of bubbles. However, the water temperature around the surface of the non-heating area at the bottom of the kettle is relatively low, resulting in subcooled boiling. When the bubbles leave the bottom surface of the kettle under the action of buoyancy, especially as the water temperature rises and the bubbles increase, a large number of bubbles enter the cold water and will be absorbed by the cold water and the bubbles will burst. The moment the bubbles burst, the water body will be vibrated to form a shock wave, and the excess energy is radiated in the form of sound energy, which is the source of noise. Due to the temperature equalizing effect of the temperature equalizing plate 3, its surface temperature is uniform, the bubbles are randomly formed and uniform. The intensity and size of the bubbles generated during the generation of the bubbles are much smaller than those of the traditional electric kettle. And because the bottom temperature is closer to the water body temperature and more uniform, the degree of subcooling during subcooled boiling is also less than that of using the traditional electric kettle, achieving the effect of reducing noise.

[0033] Specifically, the maximum temperature difference in the horizontal direction on the upper surface of the heat pipe 3 does not exceed 3°C, providing uniform and stable heat for the water in the electric kettle. The shape and size of the heat pipe 3 are adapted to the bottom wall of the kettle body 1. The shape of the heat pipe 3 is an annular ring, with a diameter of 20 - 30 cm and a thickness of 3 - 8 mm. The material of the heat pipe 3 can be metal materials such as aluminum, copper, and stainless steel, and the heat transfer working fluid is deionized water. Further, since stainless steel and water will slowly generate non-condensable gases at high temperatures, during actual manufacturing, the stainless steel needs to be passivated to improve the service life of the heat pipe 3.

[0034] Reference Figures 3 to 6 , the heat pipe 3 further includes a first capillary structure 35 and a second capillary structure 36. The first capillary structure 35 is arranged at the evaporation end 33 and is used to store the heat transfer working fluid. The second capillary structure 36 is arranged at the condensation end 34 and is used for the evaporated heat transfer working fluid and the liquid to exchange heat, so that the evaporated heat transfer working fluid condenses from a gaseous state into a liquid state.

[0035] Specifically, the materials of the first capillary structure 35 and the second capillary structure 36 are copper, stainless steel, etc.

[0036] The first capillary structure 35 includes a plurality of first capillary units 351 and a plurality of second capillary units 352. The evaporation end 33 includes a heating zone 331 and a non-heating zone 332. The plurality of first capillary units 351 are arranged at intervals in the heating zone 331, and the plurality of second capillary units 352 are arranged at intervals in the non-heating zone 332, and the distance between two adjacent first capillary units 351 is less than the distance between two adjacent second capillary units 352.

[0037] Specifically, the structural sizes of the first capillary units 351 and the second capillary units 352 are the same. The first capillary units 351 and the second capillary units 352 can be formed by methods such as metal powder / sintered wire mesh, electrodeposition, and microstructural processing respectively. By adopting different arrangements in different regions, that is, the distribution distance of the first capillary units 351 in the heating zone 331 of the evaporation end 33 is smaller, and the distribution distance of the second capillary units 352 in the non-heating zone 332 of the evaporation end 33 is larger, the converging flow of the liquid heat transfer working fluid to the heating zone 331 can be strengthened.

[0038] Specifically, the second capillary structure 36 is sintered from a mesh structure at the condensation end 34 of the second cover plate 32, increasing the condensation area and promoting the detachment of the liquid heat transfer working fluid from the condensation surface.

[0039] Reference Figure 3 and Figure 4, the heat pipe 3 further includes support columns 37. The support columns 37 are located in the vacuum chamber. One end of the support column 37 is disposed on the evaporation end 33, and the other end of the support column 37 is close to the condensation end 34. The support columns 37 are used to support the first cover plate 31 and the second cover plate 32, and the support columns 37 are also used to divert the heat transfer working fluid condensed into a liquid state by the second capillary structure 36 to the first capillary structure 35. The number of the support columns 37 is multiple, and the multiple support columns 37 are arranged at intervals between the first cover plate 31 and the second cover plate 32. By providing multiple support columns 37 in the vacuum chamber of the heat pipe 3, it can be ensured that the vacuum chamber will not deform under the action of external forces, enabling the vacuum chamber to have a greater load-bearing capacity, and at the same time improving the internal heat transfer efficiency of the heat pipe 3.

[0040] Specifically, the support column 37 is a copper powder sintered structure, and is combined with the first cover plate 31, the second cover plate 32, the first capillary structure 35 and the second capillary structure 36 through processes such as sintering or diffusion.

[0041] Specifically, the heat transfer working fluid is vaporized in the vacuum chamber when heated. The gaseous heat transfer working fluid flows to the condensation end 34, condenses into tiny water droplets after exchanging heat with the second cover plate 32. The tiny water droplets gather on the second capillary structure 36, and uniformly distribute a large amount of heat generated after heat exchange to the top of the second cover plate 32. The condensed liquid heat transfer working fluid flows back to the heating area 331 of the evaporation end 33 along the support column 37 and the first capillary structure 35, thereby completing the rapid transfer of heat, and at the same time avoiding the influence on the heat exchange effect caused by the condensed tiny water droplets not falling off on the second cover plate 32.

[0042] Reference Figure 4 , the heat pipe 3 further includes a liquid injection port 38. The liquid injection port 38 is disposed on the first cover plate 31. The liquid injection port 38 is used for the heat transfer working fluid to enter the vacuum chamber, and the liquid injection port 38 is also used for evacuating the vacuum chamber. In order to facilitate the evacuation of the vacuum and the filling of liquid into the heat pipe 3, a liquid injection port 38 should be provided on the first cover plate 31 of the heat pipe 3. At the same time, after the evacuation and liquid injection, the hole is sealed using welding technology. When evacuating the vacuum and filling the liquid, it is necessary to ensure that the vacuum degree inside the heat pipe 3 reaches a certain requirement, and ensure that the liquid is fully degassed, otherwise it will affect the performance of the heat pipe 3. At the same time, there are also certain requirements for the liquid filling rate inside the heat pipe 3. It is required that the volume of the filled liquid is 30% to 50% of the total volume of the vacuum chamber inside the heat pipe 3.

[0043] Reference Figure 3, the heat pipe 3 further includes a temperature sensor 39 and a controller. The temperature sensor 39 is disposed at one end of the second cover plate 32 away from the condensation end 34. The temperature sensor 39 is used to detect the temperature of the liquid in the inner cavity 11. The controller is in signal connection with the temperature sensor 39. The controller is also electrically connected to the first heating element 2 and the second heating element 5 respectively. The controller is further used to receive the temperature signal of the temperature sensor 39 to control the start and stop of the first heating element 2 and the second heating element 5.

[0044] Compared with the prior art where the temperature measurement point of the electric kettle is set at the bottom, resulting in a difference between the temperature of the finally boiled water and the set value, in this application, the temperature sensor 39 is disposed at one end of the second cover plate 32 away from the condensation end 34, and the temperature measurement point is set on the upper surface of the heat pipe 3. Due to the heat equalizing performance of the heat pipe 3, the temperature difference between the heat pipe 3 and the water temperature is very small, and the overall water temperature is relatively uniform. The temperature sensor 39 directly measures the temperature of the upper surface of the heat pipe 3 to determine the temperature of the water in the electric kettle, reducing the difference between the temperature of the finally boiled water and the set value, improving the accuracy of the water temperature, and thus improving the temperature control effect of the electric kettle.

[0045] The electric kettle further includes a heat conducting plate 4 and a second heating element 5. The heat conducting plate 4 is disposed at one end of the second cover plate 32 away from the condensation end 34. The heat conducting plate 4 is used to be heated to heat the liquid contained in the kettle body 1. A receiving groove 311 is formed in the middle of the first cover plate 31. The second heating element 5 is disposed in the receiving groove 311 and is located below the heat conducting plate 4. The second heating element 5 is used to heat the heat conducting plate 4.

[0046] Specifically, the heat conducting plate 4 is disposed in the middle of the second cover plate 32. By providing two heating sources, namely the first heating element 2 and the second heating element 5, the heating area can be increased and the heating efficiency can be improved.

[0047] The kettle body 1 includes a kettle body 12, a bottom plate 13, a kettle lid 14, a spout 15, a handle 16 and a switch button 17. The bottom plate 13 is hermetically disposed at the bottom of the kettle body 1. The first heating element 2 is disposed on the bottom plate 13. The heat pipe 3 is located between the kettle body 12 and the first heating element 2. The kettle lid 14 is rotatably disposed at the top of the kettle body 12. The spout 15 is disposed on the side of the kettle body 12 and is disposed near the top edge of the kettle body 12. The spout 15 is used for the liquid to flow out. The handle 16 is disposed on the side of the kettle body 12. The switch button 17 is disposed on the handle 16. The switch button 17 is electrically connected to the first heating element 2 and the second heating element 5 respectively.

[0048] Specifically, the heat pipe 3 can not only form a heat equalizing structure for the bottom plate 13, but also play a role in bottom support. The addition of the heat pipe 3 enables the electric kettle to use the heat pipe 3 as a part of the support structure of the bottom plate 13 during manufacturing, increasing the strength of the bottom plate 13.

[0049] During actual use, the user adjusts the target temperature required for heating through the switch button 17 and starts the electric kettle. At this time, the first heating element 2 and the second heating element 5 start to work. When the target temperature set by the user is almost reached (i.e., 1-2 °C different from the target temperature), the second heating element 5 stops working, and precise temperature control is achieved through the first heating element 2 and the temperature equalizing plate 3. If the user's target temperature is relatively high (the target temperature is higher than 80 °C), when it is about to boil and bubbles are violently generated, the second heating element 5 stops working, which improves the temperature uniformity of the heating surface, effectively reduces the intensity of bubble generation, and reduces the generation of noise. The overall temperature control depends on the temperature control system of the electric kettle. The temperature of the water in the electric kettle is measured by the temperature sensor 39, and the temperature signal is transmitted to the controller. The controller transmits the heating signal to the second heating element 5 and the first heating element 2. At the same time, the controller determines whether the current temperature reaches the specified temperature, and controls the stop of the second heating element 5 and the first heating element 2 based on the judgment result, so as to achieve the purpose of precise temperature control and control of bubble generation.

[0050] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric kettle, characterized in that, include: The kettle body has an inner cavity formed therein, and the inner cavity is used to hold liquid; A first heating element is arranged on the bottom wall of the kettle body; A temperature equalizing plate is arranged inside the kettle body, the temperature equalizing plate comprises a first cover plate and a second cover plate, the second cover plate is arranged above the first cover plate, the first cover plate and the second cover plate are connected to form a vacuum chamber, the interior of the vacuum chamber is filled with a heat transfer medium, the first cover plate has an evaporation end, the second cover plate has a condensation end, the evaporation end and the condensation end are arranged opposite to each other, an end of the first cover plate away from the evaporation end is connected to the first heating element, the first heating element is used to heat the first cover plate, so that the heat transfer medium is heated and evaporated from a liquid state to a gas state at the evaporation end and approaches the condensation end, the condensation end is used for condensing the heat transfer medium from a gas state to a liquid state, and the second cover plate is used to transfer the heat released by the condensation of the heat transfer medium to the interior of the kettle body to heat the liquid; The electric kettle further comprises a heat conducting plate, which is arranged at one end of the second cover plate away from the condensation end, and the heat conducting plate is used to be heated to heat the liquid contained in the kettle body; The electric kettle also includes a second heating element. A receiving groove is provided in the middle of the first cover plate. The second heating element is arranged in the receiving groove and is located below the heat conducting plate. The second heating element is used to heat the heat conducting plate.

2. The electric kettle according to claim 1, characterized in that, The temperature homogenizing plate also includes a first capillary structure and a second capillary structure. The first capillary structure is arranged at the evaporation end, and the first capillary structure is used to store and gather the heat transfer medium. The second capillary structure is arranged at the condensation end, and the second capillary structure is used for heat exchange and condensation between the evaporated heat transfer medium and the liquid, so that the evaporated heat transfer medium is condensed from gas to liquid.

3. The electric kettle according to claim 2, characterized in that, The first capillary structure includes a plurality of first capillary units and a plurality of second capillary units, the evaporation end includes a heating zone and a non-heating zone, the plurality of first capillary units are spaced apart in the heating zone, the plurality of second capillary units are spaced apart in the non-heating zone, and a distance between two adjacent first capillary units is smaller than a distance between two adjacent second capillary units.

4. The electric kettle according to claim 2, wherein The temperature equalizing plate also includes a support column, which is located in the vacuum chamber, one end of the support column is arranged on the evaporation end, and the other end of the support column is close to the condensation end. The support column is used to support the first cover plate and the second cover plate, and the support column is also used to guide the heat transfer medium condensed into liquid by the second capillary structure to the first capillary structure.

5. The electric kettle according to claim 4, characterized in that, There are multiple support columns, and the multiple support columns are arranged between the first cover plate and the second cover plate at intervals.

6. The electric kettle according to claim 1, wherein The temperature equalizing plate further comprises a liquid injection port, which is arranged on the first cover plate or the second cover plate. The liquid injection port is used for allowing the heat transfer medium to enter the vacuum chamber, and the liquid injection port is also used for evacuating the vacuum chamber.

7. The electric kettle according to claim 1, wherein, The heat pipe further includes a temperature sensor disposed at an end of the second cover plate away from the condensation end, and the temperature sensor is used to detect the temperature of the liquid in the inner cavity.

8. The electric kettle according to claim 1, wherein The kettle body includes a kettle and a bottom plate, the bottom plate is disposed at the bottom of the kettle, the first heating element is disposed on the bottom plate, and the heat pipe is located between the kettle and the heating element.

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