Heating disc assembly and liquid heating device

Abstract

The embodiment of the utility model provides a heating disc assembly and a liquid heating device. The heating disc assembly comprises a stainless steel disc used for forming a container bottom wall of the liquid heating device, and a temperature measuring hole is formed in the stainless steel disc; and the temperature measuring piece comprises an aluminum heat conductor and a temperature measuring element connected with the aluminum heat conductor, and the aluminum heat conductor extends into the temperature measuring hole to be in contact with the liquid. According to the heating disc assembly provided by the embodiment of the invention, the aluminum heat conductor is arranged between the temperature measuring element and the liquid, and the heat conduction performance of aluminum is much better than that of stainless steel, so that the aluminum heat conductor can quickly and accurately reflect the temperature of the liquid, the temperature measuring element can timely and accurately sense the temperature of the liquid through the aluminum heat conductor, and the temperature measuring effect is good.

Description

Technical Field

[0001] The utility model relates to the field of liquid heating equipment, in particular to a heating plate component and a liquid heating device. Background Art

[0002] Current liquid heating devices such as Figure 1 and Figure 2 As shown, it includes a kettle body and a heating plate assembly located at the bottom of the kettle body, and the heating plate assembly includes a stainless steel plate 10a, an aluminum plate 20a and a heating tube distributed up and down. The heat generated by the heating tube is transferred to the stainless steel plate 10a through the aluminum plate 20a, and the stainless steel plate 10a is used to heat the liquid by contacting with the liquid, and a temperature measuring component 30a, such as an NTC probe, is used to contact the lower surface of the stainless steel plate 10a, and the temperature of the liquid is determined by detecting the temperature of the stainless steel plate 10a, so as to control the heating condition of the liquid heating device. However, this temperature measurement method has a certain hysteresis, and the NTC probe cannot obtain the liquid temperature in a timely and accurate manner, and the temperature measurement effect is not very ideal. Utility Model Content

[0003] Therefore, an object of the present invention is to provide a heating plate assembly and a liquid heating device to at least solve one of the problems existing in the above-mentioned prior art or related art.

[0004] The first aspect of the utility model provides a heating plate assembly for a liquid heating device, the heating plate assembly comprising: a stainless steel plate for constituting a bottom wall of a container of the liquid heating device, the stainless steel plate being provided with a temperature measuring hole; a temperature measuring component, the temperature measuring component comprising an aluminum heat conductor and a temperature measuring element connected to the aluminum heat conductor, the aluminum heat conductor extending into the temperature measuring hole to contact with the liquid.

[0005] The heating plate assembly provided in the embodiment of this aspect has a temperature measuring hole arranged on the stainless steel plate, and an aluminum heat conductor in the temperature measuring component is arranged at the temperature measuring hole to contact with the liquid. Since the thermal conductivity of aluminum is much better than that of stainless steel, the aluminum heat conductor can quickly and accurately respond to the temperature of the liquid. In this way, the temperature measuring element can accurately and timely sense the temperature of the liquid through the aluminum heat conductor, and the temperature measurement effect is good.

[0006] In addition, the heating plate assembly provided in the above embodiment of the present application may also have the following additional technical features:

[0007] In some embodiments, the heating plate assembly further includes: an aluminum plate, which is disposed on the lower surface of the stainless steel plate, and the aluminum plate and the aluminum heat conductor are integrally formed or are a split structure.

[0008] In these embodiments, the aluminum plate is arranged on the lower surface of the stainless steel plate. Since aluminum has good thermal conductivity, the aluminum plate can quickly and evenly transfer heat to the stainless steel plate, avoiding local overheating and improving heating uniformity. In addition, if the aluminum plate and the aluminum heat conductor are integrally formed, the number of parts can be reduced, and the processing efficiency and assembly efficiency can be improved. If the aluminum plate and the aluminum heat conductor are split structures, the two are relatively independent, which can simplify the structure of the aluminum plate and facilitate the processing of the aluminum plate.

[0009] In some embodiments, based on the situation that the aluminum disk and the aluminum heat conductor are integrally formed, a portion of the aluminum disk protrudes upward to form a convex hull structure, and the convex hull structure is configured as the aluminum heat conductor. The temperature measuring element extends into the inner side of the convex hull structure and fits with the inner top wall of the convex hull structure. The aluminum disk and the aluminum heat conductor have a simple structure and are easy to process. Moreover, the two are integrally formed without a connection gap, and liquid can be prevented from overflowing through the gap between the two.

[0010] In some embodiments, based on the fact that the aluminum disk and the aluminum heat conductor are split structures, an avoidance gap is provided at the position corresponding to the aluminum disk and the temperature measuring element, and the aluminum heat conductor extends into the temperature measuring hole through the avoidance gap. The aluminum disk and the aluminum heat conductor are spaced apart to avoid the aluminum disk transferring a large amount of heat to the aluminum heat conductor, which may affect the accuracy of the aluminum heat conductor sensing the liquid temperature, thereby facilitating the temperature measuring element to accurately sense the liquid temperature through the aluminum heat conductor.

[0011] In some embodiments, the thickness of the aluminum plate ranges from 1.5 mm to 3 mm. If the thickness of the aluminum plate is too thin, it will affect the structural strength of the aluminum plate and the assembly strength between the aluminum plate and the temperature measuring component. If the thickness of the aluminum plate is too thick, when the aluminum plate and the stainless steel plate are welded together, it is easy to cause poor welding between the aluminum plate and the stainless steel plate. Therefore, the thickness of the aluminum plate is between 1.5 mm and 3 mm, which is convenient for welding with the stainless steel plate and has sufficient structural strength to assemble the temperature measuring component.

[0012] In some embodiments, the upper surfaces of the stainless steel plate and the aluminum heat conductor are respectively provided with protective coatings, which can prevent the stainless steel plate and the aluminum heat conductor from reacting with the liquid and improve the corrosion resistance of the heating plate assembly.

[0013] In some embodiments, the thickness of the protective coating ranges from 3 μm to 20 μm, which can ensure that the coating is thick enough to provide protection while preventing the coating from being too thick to affect the heating effect of the stainless steel plate and the temperature sensing effect of the temperature measuring element.

[0014] In some embodiments, the aluminum heat conductor extends out of the temperature measuring hole, so that the aluminum heat conductor can fully contact the liquid and accurately reflect the temperature of the liquid.

[0015] In some embodiments, the upper surface of the aluminum heat conductor is flush with the upper surface of the stainless steel plate, which facilitates cleaning of the heating plate assembly and prevents food residues from accumulating at the corners of the aluminum heat conductor protruding from the temperature measuring hole.

[0016] In some embodiments, the heating plate assembly further includes: a heating tube, which is arranged on the lower surface of the aluminum plate, and is in an unclosed annular structure, and the temperature measuring hole is arranged on the stainless steel plate corresponding to the unclosed area of ​​the heating tube. Then the temperature measuring element can be as far away from the heating tube as possible to avoid the heat generated by the heating tube affecting the temperature measuring element, thereby affecting the temperature measurement accuracy of the liquid by the temperature measuring element.

[0017] In some embodiments, based on the fact that the aluminum plate and the aluminum heat conductor are split structures, the periphery of the aluminum heat conductor is welded to the temperature measuring hole, which is convenient for processing, improves the installation stability of the aluminum heat conductor, and has no gap between the aluminum heat conductor and the temperature measuring hole, which can prevent liquid from overflowing through the gap.

[0018] In some embodiments, the temperature measuring element is an NTC probe, which can accurately sense the temperature of the aluminum heat conductor and thus sense the temperature of the liquid.

[0019] In some embodiments, the lower surface of the aluminum plate has a threaded column, the heating plate assembly further includes a connecting frame, the connecting frame is connected to the threaded column by screws, and the temperature measuring unit is installed on the connecting frame. The temperature measuring element is connected to the aluminum plate through the connecting frame, which is conducive to making the temperature measuring element close to the aluminum heat conductor, and fitting or connecting with the aluminum heat conductor.

[0020] A second aspect of the present invention provides a liquid heating device, a container body and a heating plate assembly as described in any one of the above technical solutions, wherein the heating plate assembly is arranged at the bottom opening of the container body.

[0021] The liquid heating device provided in the embodiment of this aspect has the heating plate assembly of any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0022] Other aspects and / or advantages of the general inventive concept will be partially set forth in the following description, and some will be clear from the description or may be learned through implementation of the general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects and features of the present invention will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A longitudinal cross-sectional schematic diagram of a liquid heating device in the related art is shown;

[0025] Figure 2 Shows Figure 1 A local enlarged schematic diagram of point I in the middle;

[0026] Figure 3A longitudinal cross-sectional schematic diagram of a liquid heating device according to an embodiment of the present application is shown;

[0027] Figure 4 Shows Figure 3 A partial enlarged schematic diagram of the J in the middle;

[0028] Figure 5 A partial structural schematic diagram of a heating plate assembly according to a first embodiment of the present application is shown;

[0029] Figure 6 A partial exploded schematic diagram of a heating plate assembly according to a first embodiment of the present application is shown;

[0030] Figure 7 A schematic top view of a heating plate assembly according to a first embodiment of the present application is shown;

[0031] Figure 8 Shows Figure 7 Schematic cross-sectional view along the AA direction;

[0032] Fig. 9 Shows Figure 8 A local enlarged schematic diagram of the K in the middle;

[0033] Fig.10 A partial exploded schematic diagram of a heating plate assembly according to a second embodiment of the present application is shown;

[0034] Fig.11 A schematic top view of a heating plate assembly according to a second embodiment of the present application is shown;

[0035] Fig.12 Shows Fig.11 Schematic cross-sectional view in the middle BB direction;

[0036] Fig.13 Shows Fig.12 A local enlarged schematic diagram of point L in the middle.

[0037] Figure 1 and Figure 2 Description of Figure Numbers:

[0038] 10a stainless steel plate, 20a aluminum plate, 30a temperature measuring piece;

[0039] Figures 3 to 13 Description of Figure Numbers:

[0040] 10 stainless steel plate, 110 temperature measuring holes,

[0041] 20 aluminum plate, 210 convex structure, 220 avoidance gap, 230 threaded column,

[0042] 30 temperature measuring piece, 310 aluminum thermal conductor, 320 temperature measuring element, 330 silicone seat,

[0043] 40 protective coating,

[0044] 50 heating tubes,

[0045] 60 connection rack. DETAILED DESCRIPTION

[0046] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0047] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present application.

[0048] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more.

[0049] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as the second member, second component, second region, second layer, or second portion.

[0050] In the specification, when an element such as a layer, a region or a substrate is described as being “on”, “connected to” or “coupled to” another element, the element may be directly “on”, “connected to” or “coupled to” another element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on”, “directly connected to” or “directly coupled to” another element, other elements may not be present therebetween.

[0051] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof. The term "plurality" represents any number of two and more than two.

[0052] The limitations of directional terms such as "upper" and "lower" in this application are based on the directional limitations of the product in normal use, unless otherwise specified, they are based on the directional limitations in the drawings.

[0053] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant field and the present invention, and should not be interpreted in an idealized or overly formal way.

[0054] Electric kettle in related art such as Figure 1 and Figure 2 As shown, the temperature measuring component 30a fits the stainless steel plate 10a at the bottom of the kettle. The thickness of the stainless steel plate 10a is between 0.4mm and 0.5mm. There is a protective coating on the surface of the stainless steel plate 10a. The temperature of the liquid is indirectly obtained by detecting the temperature of the stainless steel plate 10a. Since the thermal conductivity of stainless steel is 16W / m*K, according to the thermal conductivity, the thermal conductivity of a 0.4mm stainless steel plate is equivalent to the thermal conductivity of an aluminum plate with a thickness of 5.75mm. Such poor thermal conductivity will affect the temperature sensing performance of the temperature measuring component 30a, resulting in the inability of the electric kettle to accurately control the temperature. In other words, the current temperature measuring method of the temperature measuring component 30a cannot accurately control the water temperature, resulting in a temperature sensing lag or excessive error. In the case of a temperature sensing lag, the electric kettle is prone to dry burning and local overheating, which can cause problems such as the heating tube melting plate or the surrounding plastic burning, posing a safety risk.

[0055] Based on this, the embodiment of the present application provides a heating plate assembly and a liquid heating device using the heating plate assembly, so that the temperature measuring component can timely and accurately sense the liquid temperature, thereby facilitating the liquid heating device to accurately control the heating situation according to the temperature detected by the temperature measuring component, avoiding the risk of dry burning.

[0056] The following will be combined Figures 3 to 13 The invention discloses a heating plate assembly and a liquid heating device provided in the embodiments of the invention.

[0057] like Figure 3 and Figure 4 As shown, the first embodiment of the utility model provides a heating plate assembly for a liquid heating device, the heating plate assembly comprising: a stainless steel plate 10, used to constitute the bottom wall of the container of the liquid heating device so as to be in contact with the liquid, the stainless steel plate 10 is provided with a temperature measuring hole 110; a temperature measuring component 30, the temperature measuring component 30 comprises an aluminum heat conductor 310 and a temperature measuring element 320 connected to the aluminum heat conductor 310, the aluminum heat conductor 310 extends into the temperature measuring hole 110 to be in contact with the liquid.

[0058] The heating plate assembly provided in the embodiment of this aspect has a temperature measuring hole 110 set on the stainless steel plate 10, and the aluminum heat conductor 310 in the temperature measuring part 30 is set at the temperature measuring hole 110 to contact the liquid, and the aluminum heat conductor 310 is spaced between the temperature measuring element 320 and the liquid. Compared with the stainless steel plate 10 spaced between the temperature measuring element 320 and the liquid in the related art, since the thermal conductivity of aluminum is much better than that of stainless steel, the thermal conductivity coefficient of stainless steel is 16W / m*K, and the thermal conductivity coefficient of aluminum is 230W / m*K, therefore, the aluminum heat conductor 310 can quickly and accurately respond to the temperature of the liquid, which is conducive to the temperature measuring element 320 timely and accurately sensing the temperature of the liquid through the aluminum heat conductor 310, and the temperature measurement effect is good. Moreover, it is conducive to the liquid heating device using the heating plate assembly to accurately control the heating condition of the liquid heating device according to the temperature obtained by the temperature measuring part 30, which can prevent dry burning, resulting in local overheating, and then causing the problem of the melting plate of the heating tube 50 or the surrounding plastic burning.

[0059] As an example, the aluminum heat conductor 310 extends upward from the temperature measuring hole 110, so that the aluminum heat conductor 310 can fully contact the liquid, thereby accurately reflecting the temperature of the liquid.

[0060] As an example, the upper surface of the aluminum heat conductor 310 is flush with the upper surface of the stainless steel plate 10. The upper surface of the heating plate assembly is relatively flat, which is convenient for cleaning the heating plate assembly and can prevent food residues from accumulating at the root of the convex part of the aluminum heat conductor 310.

[0061] As an example, the temperature measuring element is an NTC probe.

[0062] Furthermore, in some embodiments, Figure 6 and Fig.10 As shown, the heating plate assembly further includes: an aluminum plate 20, which is arranged on the lower surface of the stainless steel plate 10, and the aluminum plate 20 and the aluminum heat conductor 310 are integrally formed or are a split structure.

[0063] In these embodiments, the aluminum plate 20 is disposed on the lower surface of the stainless steel plate 10. Since aluminum has good thermal conductivity, the aluminum plate 20 can quickly and evenly transfer heat to the stainless steel plate 10, thereby avoiding local overheating and improving heating uniformity. Figures 5 to 9As shown, the aluminum plate 20 and the aluminum heat conductor 310 are integrally formed, which can reduce the number of parts and improve the processing efficiency and assembly efficiency. Figures 10 to 13 As shown, the aluminum plate 20 and the aluminum heat conductor 310 are split structures, and the two are relatively independent, which can simplify the structure of the aluminum plate 20 and facilitate the processing of the aluminum plate 20.

[0064] Furthermore, if Figures 5 to 9 As shown, based on the situation that the aluminum plate 20 and the aluminum heat conductor 310 are integrally formed, a part of the aluminum plate 20 protrudes upward to form a convex hull structure 210, and the convex hull structure 210 is configured as the aluminum heat conductor 310. The temperature measuring element 320 is an NTC probe, which extends into the inner side of the convex hull structure 210 and fits with the inner top wall of the convex hull structure 210. The aluminum plate 20 and the aluminum heat conductor 310 are integrally formed, which is convenient for processing. Moreover, there is no connection gap between the two, which can also prevent liquid from overflowing through the gap between the two.

[0065] Furthermore, if Figures 10 to 13 As shown, based on the fact that the aluminum plate 20 and the aluminum heat conductor 310 are split structures, the positions of the aluminum plate 20 and the temperature measuring element 30 are provided with an avoidance notch 220, and the aluminum heat conductor 310 extends into the temperature measuring hole 110 through the avoidance notch 220. The aluminum plate 20 and the aluminum heat conductor 310 are arranged at intervals, which can prevent the aluminum plate 20 from transferring a large amount of heat to the aluminum heat conductor 310, thereby preventing the aluminum heat conductor 310 from sensing the liquid temperature accurately, thereby facilitating the temperature measuring element 320 to accurately sense the liquid temperature through the aluminum heat conductor 310.

[0066] Furthermore, the thickness of the aluminum plate 20 ranges from 1.5 mm to 3 mm. If the thickness of the aluminum plate 20 is too thin, it will affect the structural strength of the aluminum plate 20 and the assembly strength of the aluminum plate 20 and the temperature measuring component 30. If the thickness of the aluminum plate 20 is too thick, when the aluminum plate 20 and the stainless steel plate 10 are welded together, it is easy to cause poor welding between the aluminum plate 20 and the stainless steel plate 10. Therefore, the thickness of the aluminum plate 20 is between 1.5 mm and 3 mm, which is convenient for welding with the stainless steel plate 10 and has sufficient structural strength to assemble the temperature measuring component 30.

[0067] To improve the corrosion resistance, further, in some embodiments, as Figure 4 , Fig. 9 and Fig.13 As shown, the upper surfaces of the stainless steel plate 10 and the aluminum heat conductor 310 are respectively provided with a protective coating 40. This can prevent the stainless steel plate 10 and the aluminum heat conductor 310 from reacting with the liquid, thereby improving the corrosion resistance of the heating plate assembly.

[0068] In a specific application, the protective coating 40 can be integrally formed on the upper surface of the stainless steel plate 10 and the upper surface of the aluminum heat conductor 310 for easy processing. Of course, the protective coating 40 can also be independently formed on the upper surface of the stainless steel plate 10 and the upper surface of the aluminum heat conductor 310. The two protective coatings 40 can be the same or different.

[0069] The protective coating 40 may be a ceramic coating, a silicon-based coating, a PTFET (polytetrafluoroethylene) coating, or the like, which are corrosion-resistant coatings and are not listed in detail here.

[0070] Furthermore, the thickness of the protective coating 40 ranges from 3 μm to 20 μm, which can ensure that the coating is thick enough to provide protection, while preventing the coating from being too thick to affect the heating effect of the stainless steel plate 10 and the temperature sensing effect of the temperature measuring element 30 .

[0071] Furthermore, in some embodiments, Figure 6 and Fig.10 As shown, the heating plate assembly further includes: a heating tube 50, which is arranged on the lower surface of the aluminum plate 20, and the heating tube 50 is an unclosed annular structure, and the temperature measuring hole 110 is arranged on the stainless steel plate 10 corresponding to the unclosed area of ​​the heating tube 50. Then the temperature measuring element 30 can be as far away from the heating tube 50 as possible to prevent the heat generated by the heating tube 50 from affecting the temperature measuring element 30, thereby affecting the temperature measurement accuracy of the liquid by the temperature measuring element 30.

[0072] Regarding the installation method of the temperature measuring element 30, further, in some embodiments, based on the fact that the aluminum plate 20 and the aluminum heat conductor 310 are split structures, the aluminum heat conductor 310 is welded at the temperature measuring hole 110. The processing is convenient, and there is no gap between the two, so as to prevent the liquid from overflowing through the gap between the temperature measuring hole 110 and the aluminum heat conductor 310.

[0073] like Figure 4 , Figure 8 , Fig. 9 , Fig.12 and Fig.13 As shown, the lower surface of the aluminum plate 20 has a threaded column 230, and the heating plate assembly further includes a connecting frame 60, which is connected to the threaded column 230 by screws, and the temperature measuring unit is installed on the connecting frame 60. The temperature measuring element 320 is connected to the aluminum plate 20 through the connecting frame 60, which is conducive to making the temperature measuring element 320 close to the aluminum heat conductor 310, and fit or connect with the aluminum heat conductor 310.

[0074] Furthermore, if Figure 4 As shown, the temperature measuring member 30 further includes a silicone seat 330 , which surrounds the outer periphery of the temperature measuring element 320 and is located below the temperature measuring hole 110 . The silicone seat 330 is used to prevent a large amount of heat from the aluminum plate 20 or the heating tube 50 from being transferred to the temperature measuring element 320 .

[0075] In specific applications, such as Figure 5 As shown, the silicone seat 330 is installed on the connecting frame 60, and the silicone seat 330 separates the connecting frame 60 and the temperature measuring element 320 to prevent the temperature on the aluminum plate 20 from being transferred to the temperature measuring element 320 through the connecting frame 60, thereby interfering with the temperature measuring element 320's detection accuracy of the liquid temperature.

[0076] A second aspect of the present invention provides a liquid heating device, comprising: a container body and a heating plate assembly as described in any one of the above embodiments, wherein the heating plate assembly is arranged at the bottom opening of the container body.

[0077] The liquid heating device provided in this embodiment has the heating plate assembly of any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which will not be described in detail here. The heating plate assembly and the container body form a receiving cavity that can hold liquid, wherein the stainless steel plate 10 can serve as the bottom wall of the receiving cavity to contact the liquid.

[0078] The container body can be a glass container body, and of course can also be a container body made of other materials.

[0079] The liquid heating device can be an electric kettle, a health kettle or an electric water cup, etc.

[0080] The liquid heating device of two embodiments of the present application is described in detail below.

[0081] Embodiment 1:

[0082] like Figures 3 to 9 As shown, a portion of the aluminum plate 20 protrudes upward to form a convex structure 210. The convex structure 210 serves as the aluminum heat conductor 310 in the temperature measuring element 30. It passes through the temperature measuring hole 110 on the stainless steel plate 10 to contact the liquid. The temperature measuring element 320, such as the NTC probe, is close to the inner bottom of the convex structure 210 to sense the temperature of the liquid in the pot, thereby controlling the heating tube 50 to heat or stop heating according to the detected temperature. The entire surface of the aluminum heat conductor 310 and the stainless steel plate 10 are wrapped by the protective coating 40, and the water in the pot is separated from the aluminum heat conductor 310 and the stainless steel plate 10 by the protective coating 40. The thickness of the aluminum plate 20 is between 1.5mm and 3mm, and the thermal conductivity is much better than that of the 0.4mm stainless steel plate 10, which ensures that the NTC probe has better temperature sensing performance, thereby achieving accurate control of water temperature, avoiding dry burning of the heating plate, and reducing safety risks.

[0083] Embodiment 2:

[0084] like Figures 10 to 13As shown, in order to improve the temperature sensing performance of the NTC probe, the temperature measuring element 30 is designed independently as a whole, that is, the aluminum heat conductor 310 and the temperature measuring element 320 are assembled together first, and then installed at the temperature measuring hole 110. In this way, the thickness of the temperature measuring element 30 is not affected by the aluminum plate 20, especially the thickness of the aluminum heat conductor 310 can be much less than 1.5mm, and the heat conduction is faster. In addition, the aluminum heat conductor 310 can be welded to the temperature measuring hole 110 through a welding process, which ensures the connection reliability between the aluminum heat conductor 310 and the stainless steel plate 10, and the upper surface of the aluminum heat conductor 310 has a protective coating 40, which not only ensures that the aluminum heat conductor 310 does not contact with the liquid, but also ensures that this part of the aluminum heat conductor 310 does not leak.

[0085] In a specific application, the protective coating 40 can be sprayed after the aluminum heat conductor 310 is welded to the temperature measuring hole 110, so that the protective coating 40 can further block the assembly gap between the aluminum heat conductor 310 and the temperature measuring hole 110. The protective coating 40 can also be sprayed on the stainless steel plate 10 at one time to protect the stainless steel plate 10, which is convenient for processing.

[0086] Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that, in the opinion of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A heating plate assembly for a liquid heating device, characterized in that: The heating plate assembly comprises: A stainless steel plate (10) used to form a bottom wall of a container of the liquid heating device, wherein the stainless steel plate (10) is provided with a temperature measuring hole (110); A temperature measuring component (30) comprising an aluminum heat conductor (310) and a temperature measuring element (320) connected to the aluminum heat conductor (310), wherein the aluminum heat conductor (310) extends into the temperature measuring hole (110) to contact the liquid.

2. The heating plate assembly according to claim 1, characterized in that: The heating plate assembly also includes: The aluminum plate (20) is arranged on the lower surface of the stainless steel plate (10), and the aluminum plate (20) and the aluminum heat conductor (310) are integrally formed or have a split structure.

3. The heating plate assembly according to claim 2, characterized in that: Based on the fact that the aluminum disk (20) and the aluminum heat conductor (310) are integrally formed, a portion of the aluminum disk (20) protrudes upward to form a convex structure (210), the convex structure (210) is configured as the aluminum heat conductor (310), and the temperature measuring element (320) extends into the inner side of the convex structure (210) and fits with the inner top wall of the convex structure (210).

4. The heating plate assembly according to claim 2, characterized in that: Based on the fact that the aluminum plate (20) and the aluminum heat conductor (310) are of a split structure, an avoidance notch (220) is provided at a position corresponding to the aluminum plate (20) and the temperature measuring element (30), and the aluminum heat conductor (310) extends into the temperature measuring hole (110) through the avoidance notch (220).

5. The heating plate assembly according to claim 2, characterized in that: The thickness of the aluminum plate (20) ranges from 1.5 mm to 3 mm.

6. The heating plate assembly according to any one of claims 1 to 5, characterized in that: The upper surfaces of the stainless steel plate (10) and the aluminum heat conductor (310) are respectively provided with a protective coating (40), and the thickness of the protective coating (40) ranges from 3 μm to 20 μm.

7. The heating plate assembly according to any one of claims 1 to 5, characterized in that: The aluminum heat conductor (310) extends out of the temperature measuring hole (110), or the upper surface of the aluminum heat conductor (310) is flush with the upper surface of the stainless steel plate (10).

8. The heating plate assembly according to any one of claims 2 to 5, characterized in that: The heating plate assembly also includes: A heating tube (50), the heating tube (50) being arranged on the lower surface of the aluminum plate (20), the heating tube (50) being in an unclosed annular structure, and the temperature measuring hole (110) being arranged on the stainless steel plate (10) corresponding to the unclosed area of ​​the heating tube (50).

9. The heating plate assembly according to any one of claims 2 to 5, characterized in that: Based on the fact that the aluminum plate (20) and the aluminum heat conductor (310) are of a split structure, the outer periphery of the aluminum heat conductor (310) is welded to the temperature measuring hole (110); and / or The temperature measuring element (320) is an NTC probe; and / or The lower surface of the aluminum plate (20) has a threaded column (230), and the heating plate assembly also includes a connecting frame (60), the connecting frame (60) is connected to the threaded column (230) by screws, and the temperature measuring element (320) is installed on the connecting frame (60).

10. A liquid heating device, characterized in that: include: A container body and a heating plate assembly as claimed in any one of claims 1 to 9, wherein the heating plate assembly is arranged at the bottom opening of the container body.

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