Liquid heating device

Abstract

The utility model provides a liquid heating device. The liquid heating device comprises a container body and a heating assembly. The container body is used for containing liquid and comprises a bottom wall and a side wall which are connected, a liquid outlet is formed in the bottom wall of the container body, the side wall of the container body comprises a main body section and a contraction section which are connected in the height direction, and the contraction section contracts towards the interior of the container body relative to the main body section; the heating assembly comprises a first heating piece and a second heating piece, the first heating piece is located on the outer surface of the bottom wall of the container body, and the second heating piece is located on the outer surface of the contraction section. The heating power can be increased by increasing the number of the heating pieces, the heating waiting time can be shortened, dispersed heating can be achieved through dispersed arrangement of the heating pieces, local heat concentration is reduced, the risk that a large number of bubbles are generated in a local area is reduced, and noise in the heating process can be controlled easily.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and particularly relates to a liquid heating device. Background Art

[0002] Electric thermos flasks are favored by multi-person families because of their convenient water intake and large capacity. However, precisely to meet the household water consumption demand, the capacity of existing electric thermos flasks is generally 5L, which is several times that of the common 1.5L capacity of electric kettles, resulting in a low heating rate and a long heating time. Specifically, it generally takes about half an hour to boil 5L of water, causing a long waiting time for users.

[0003] In response to this, if the heating power of the heating tube is simply increased, a large number of bubbles will be generated in a local area due to excessive power, resulting in a relatively large noise when the bubbles burst. Summary of the Utility Model

[0004] Therefore, the purpose of the utility model is to provide a liquid heating device to solve the problem of how to control the noise while increasing the heating rate of the electric thermos flask.

[0005] According to one aspect of the utility model, a liquid heating device is provided. The liquid heating device includes a container body and a heating assembly. The container body is used for containing liquid. The container body includes a bottom wall and a side wall connected to each other. The bottom wall of the container body is provided with a liquid outlet. The side wall of the container body includes a main body section and a contraction section connected in the height direction. The contraction section contracts towards the inside of the container body relative to the main body section. The heating assembly includes a first heating element and a second heating element. The first heating element is located on the outer surface of the bottom wall of the container body, and the second heating element is located on the outer surface of the contraction section.

[0006] The liquid heating device provided by the embodiment of the utility model respectively arranges the first heating element and the second heating element on the bottom wall and the side wall of the container body. It can not only increase the heating power by increasing the number of heating elements, which helps to improve the heating rate and shorten the heating waiting time, but also achieve dispersed heating through the dispersed arrangement of the heating elements, reduce the local heat concentration, and reduce the risk of generating a large number of bubbles in a local area, which helps to control the noise during the heating process. Thus, the noise of the liquid heating device is controlled while increasing its heating rate.

[0007] In addition, the container body is sometimes set as a detachable structure, that is, the container body can be detached from the main structure of the liquid heating device, which is convenient for filling the liquid. At this time, a container cover is often arranged outside the container body to shield other components directly connected to the container body, such as the coupler forming the liquid outlet channel. The container cover is often made of plastic material. In order to reduce the damage of the heating element to the container cover, it is necessary to ensure that there is a sufficient safety distance between the heating element and the container cover, usually at least greater than 5 mm. For a liquid heating device with a liquid outlet on the bottom wall of the container body, such as an electric thermos, the container body usually has a relatively large volume, so the overall size of the liquid heating device is relatively large, which will occupy more horizontal space in the home environment and is more sensitive to the horizontal size. When these two factors are superimposed, if the second heating element is directly arranged on the outer surface of the side wall of the existing container body, it is necessary to correspondingly increase the size of the container cover to reserve the installation space and safety distance for the second heating element, which will cause a significant increase in the horizontal size of the liquid heating device. By designing the side wall of the container body to include a main section and a contracting section that contracts inward, and arranging the second heating element on the outer surface of the contracting section, it is possible to create an installation space and a safety distance for the second heating element without substantially increasing the horizontal size of the liquid heating device, ensuring an appropriate size of the liquid heating device.

[0008] In some embodiments, optionally, the first heating element and the second heating element are spaced apart in the height direction of the container body, and the value range of the height interval between the first heating element and the second heating element is 2 mm to 40 mm.

[0009] In these embodiments, by defining the minimum interval between the first heating element and the second heating element in the height direction, that is, 2 mm, a basic dispersed heating effect can be ensured. By defining the maximum interval between the first heating element and the second heating element in the height direction, that is, 40 mm, on the one hand, the height difference of the heating position can be reasonably controlled, reducing the risk that the second heating element is difficult to effectively heat when the position of the second heating element is too high and the liquid level is too low. On the other hand, the height of the contracting section can be correspondingly controlled, which not only helps to control the overall height of the machine but also reduces the impact of the too-high contracting section on the structure and strength of the container body, ensuring the use reliability of the product.

[0010] In some embodiments, optionally, the heating components are distributed below a preset height of the container body, and the value range of the preset height is 45% to 80% of the height of the container body.

[0011] In these embodiments, the overall setting height of the heating component is restricted to be below a certain proportion of the height of the container body, that is, the heating heat source is concentrated and distributed below a certain height of the container body. By specifically defining this height condition with the proportion of the height of the container body, it can adapt to container bodies with different specific heights, improving the adaptability of the solution. For the value range of this proportion, its lower limit, that is, 45%, leaves enough height space for the distribution of the heating component, which helps to fully disperse the heat source; its upper limit, that is, 80%, can limit the heating component below the common liquid level, thus reducing the risk of ineffective heating when the liquid level is lower than some of the heating elements, which helps to ensure the reliable operation of the liquid heating device.

[0012] In some embodiments, optionally, the first heating element includes a first heating tube, the second heating element includes a second heating tube, and the opening directions of the first heating tube and the second heating tube are different from each other.

[0013] In these embodiments, by specifically using heating tubes as the first heating element and the second heating element, that is, using conventional heating elements, it helps to control the product cost. Due to its structural limitations, the heating tube is often an arc-shaped structure, that is, it presents as a ring with an opening. By making the opening directions of the first heating tube and the second heating tube different from each other, heat dispersion in the circumferential direction can be achieved, which helps to reduce noise and improve the noise reduction effect.

[0014] In some embodiments, optionally, the contraction section includes a bending section and a columnar section. The bending section extends from the main body section towards the inside of the container body, and the columnar section is connected to the end of the bending section away from the main body section. The second heating element is located on the outer surface of the bending section.

[0015] In these embodiments, by designing the contraction section to include a bending section and a columnar section, a stepped contraction section can be formed. At this time, the flat bending section can provide a reliable setting plane for the second heating element, making it convenient to install the second heating element.

[0016] In some embodiments, optionally, the contraction section includes an inclined section. The inclined section extends from the main body section towards the inside of the container body and simultaneously extends along the height direction of the container body. The second heating element is located on the outer surface of the inclined section.

[0017] In these embodiments, by designing the contraction section as an inclined section, on the one hand, the size of the contraction section can be gradually changed, improving the structural stability. On the other hand, the large-area inclined surface can provide sufficient setting space for the second heating element, improving the inclusiveness of the setting quantity of the second heating element.

[0018] In some embodiments, optionally, the contraction section is connected to the bottom wall of the container body.

[0019] In these embodiments, since the contraction section contracts towards the interior of the container body relative to the main body section, the lateral dimension of the contraction section is smaller than that of the main body section, which may affect the structural strength of the container body. Specifically, whether it is a stepped contraction section or an inclined contraction section, as long as it leaves the bottom wall and is embedded in the main body section, there will inevitably be a position where the cross-section of the container body suddenly decreases, which may lead to stress concentration here. By arranging the contraction section at the bottom of the container body and connecting it to the bottom wall of the container body, the bottom wall can provide support for the contraction section, which helps to enhance the structural strength of the container body.

[0020] In some embodiments, optionally, the heating power of the second heating element is greater than that of the first heating element.

[0021] In these embodiments, since the bottom wall of the container body is connected to the contraction section with a lateral dimension smaller than that of the main body section, the area of the bottom wall is reduced, and the size of the first heating element is correspondingly smaller than that of the second heating element. By allocating a greater heating power to the second heating element with a relatively larger size, it is more conducive to dispersing the heat of the heating element, which helps to reduce the noise during the heating process.

[0022] In some embodiments, optionally, the liquid heating device further includes a heat conducting member covering at least a part of the outer surface of the bottom wall of the container body and the outer surface of the contraction section, and the first heating element and the second heating element are arranged on the surface of the heat conducting member facing away from the container body.

[0023] In these embodiments, by making the heat conducting member cover at least a part of the outer surface of the bottom wall of the container body and the outer surface of the contraction section at the same time, it can not only ensure that both the first heating element and the second heating element are in contact with the heat conducting member to play a heat conducting role, but also increase the heat conducting area, which helps to strengthen the heat dispersion and reduce the noise during the heating process.

[0024] In some embodiments, optionally, the heating assembly further includes a third heating element, the third heating element is a flexible member and is laid on the outer surface of the main body section, and the heating power of the third heating element is smaller than that of the first heating element and the second heating element.

[0025] In these embodiments, by additionally adding a flexible third heating element laid on the outer surface of the main body section, the heating power can be further increased, and the effects of dispersed heating and noise reduction can be improved. At this time, since the third heating element is a flexible element and occupies a small lateral space, it can be arranged on the outer surface of the main body section without significantly affecting the lateral dimension of the liquid heating device. It should be understood that the aforementioned safety distance still needs to be left between the third heating element and the plastic housing, but the influence on the lateral dimension of the liquid heating device is small. In addition, even if the overall setting height of the heating assembly is controlled, there may still be a situation where the liquid level does not completely exceed all heat sources. For example, the liquid level is lower than the highest point of the third heating element, resulting in the liquid level not completely exceeding the third heating element. By allocating the minimum heating power to the third heating element, the adverse effects caused when such a situation occurs can be reduced.

[0026] In some embodiments, optionally, the liquid heating device further includes at least one liquid level sensor and a controller. The at least one liquid level sensor is arranged on the side wall of the container body, and the at least one liquid level sensor is arranged above at least one of the second heating element and the third heating element in the height direction of the container body one by one; the controller is connected to the at least one liquid level sensor, the first heating element, the second heating element, and the third heating element, and the controller is configured to control the heating element corresponding to any one of the liquid level sensors to stop heating when it detects that the liquid level in the container body is lower than the detection height of any one of the at least one liquid level sensors.

[0027] In these embodiments, by arranging a liquid level sensor above at least one heating element, it is possible to determine that the liquid level exceeds the corresponding heating element when the liquid level reaches the corresponding height, and then the controller executes control to make the heating element not exceeded by the liquid level stop heating, thereby reducing the risk of dry burning in the corresponding area of the container body and ensuring the use reliability of the liquid heating device. It should be understood that at this time, the controller also controls the heating element exceeded by the liquid level to continue heating. Combining with the embodiment in which the heating power of the third heating element is less than that of the first heating element and the second heating element introduced above, at this time, even if the third heating element stops heating, due to its small heating power, the loss of the overall heating power is small, which can weaken the influence on the heating rate and help ensure the heating rate.

[0028] In some embodiments, optionally, two positioning ribs are provided on the outer surface of the main body section, and the two positioning ribs are spaced apart along the height direction of the container body, and the third heating element is located between the two positioning ribs.

[0029] In these embodiments, by arranging positioning ribs for positioning the third heating element on the outer surface of the main body section, the position movement or detachment of the third heating element can be reduced, and the reliability of the overall structure is ensured.

[0030] Other aspects and / or advantages of the general concept of the present utility model will be partly described in the following description, and part of them will be clear from the description, or can be learned through the implementation of the general concept of the present utility model. Description of the Drawings

[0031] Through the following description of the embodiments in conjunction with the drawings, the above and other objects and features of the present utility model will become clearer. In the drawings:

[0032] Figure 1 is a schematic structural diagram of a liquid heating device according to an embodiment of the present utility model;

[0033] Figure 2 is a longitudinal sectional view of a liquid heating device according to an embodiment of the present utility model;

[0034] Figure 3 is a schematic structural diagram of a container body and a heating component according to an embodiment of the present utility model;

[0035] Figure 4 is a longitudinal sectional view of a container body and a heating component according to an embodiment of the present utility model;

[0036] Figure 5 is a longitudinal sectional view of a liquid heating device according to another embodiment of the present utility model;

[0037] Figure 6 is a schematic structural diagram of a container body and a heating component according to another embodiment of the present utility model;

[0038] Figure 7 is a longitudinal sectional view of a container body and a heating component according to another embodiment of the present utility model.

[0039] Figures 1 to 7 Explanation of the reference numerals in the drawings:

[0040] 10: Container body; 11: Liquid outlet; 12: Main body section; 13: Shrinkage section; 131: Bending section; 132: Columnar section; 133: Inclined section; 14: Positioning rib; 14a: First positioning rib; 14b: Second positioning rib;

[0041] 20: Liquid outlet channel;

[0042] 30: Heating component; 31: First heating element; 32: Second heating element; 33: Third heating element;

[0043] 40: Heat conducting member;

[0044] 50: Liquid level sensor; 50a: First liquid level sensor; 50b: Second liquid level sensor;

[0045] 60: Liquid supply head;

[0046] 70: Operation panel;

[0047] 80: Container cover. Detailed implementation manners

[0048] The following detailed implementation manners are provided to assist the reader in obtaining 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 apparent. For example, the order of operations described herein is merely exemplary and is not limited to those set forth herein, but rather may be changed as will be apparent after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0049] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. On the contrary, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, devices, and / or systems described herein, which will be apparent after understanding the disclosure of the present application.

[0050] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more of them.

[0051] Although terms such as "first", "second", and "third" may be used herein to describe various components, components, regions, layers, or parts, these components, components, regions, layers, or parts should not be limited by these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer, or part from another. Thus, the first component, first component, first region, first layer, or first part referred to in the examples described herein may also be referred to as the second component, second component, second region, second layer, or second part without departing from the teachings of the examples.

[0052] In the specification, when an element (such as a layer, region, or substrate) is described as "on", "connected to", or "coupled to" another element, the element may be directly "on", directly "connected to", or "coupled to" the other element, or there may be one or more other elements therebetween. On the contrary, when an element is described as "directly on", "directly connected to", or "directly coupled to" another element, there may be no other elements therebetween.

[0053] The terms used herein are for describing various examples only and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising", "including" and "having" specify the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs after understanding this utility model. Unless clearly defined herein, terms (such as those defined in a general dictionary) shall be construed to have a meaning consistent with their meaning in the context of the relevant field and this utility model, and shall not be interpreted idealistically or overly formally.

[0055] Furthermore, in the description of the examples, when it is considered that a detailed description of the relevant structures or functions known to the public will cause a blurred interpretation of this utility model, such detailed descriptions will be omitted.

[0056] Next, in combination with Figures 1 to 7 the liquid heating device provided by the embodiments of this utility model will be introduced.

[0057] As Figures 1 to 4 shown, an embodiment of one aspect of this utility model provides a liquid heating device, which includes a container body 10, a liquid outlet channel 20 and a heating assembly 30. The container body 10 is used for containing liquid. The container body 10 includes a bottom wall and a side wall connected to each other. The bottom wall of the container body 10 is provided with a liquid outlet 11. The side wall of the container body 10 includes a main body section 12 and a contraction section 13 connected in the height direction. The contraction section 13 contracts towards the inside of the container body 10 relative to the main body section 12; the liquid outlet channel 20 is communicated with the liquid outlet 11, and a liquid supply port is provided at one end of the liquid outlet channel 20 away from the liquid outlet 11 ( Figure 1 not directly shown in

[0058] The liquid heating device provided by the embodiment of the present utility model is provided with a first heating element 31 and a second heating element 32 on the bottom wall and the side wall of the container body 10 respectively. It can not only increase the heating power by increasing the number of heating elements, which helps to improve the heating rate and shorten the heating waiting time, but also achieve dispersed heating through the dispersed arrangement of the heating elements, reduce the local heat concentration, and reduce the risk of generating a large number of bubbles in the local area, which helps to control the noise during the heating process. Thus, while improving the heating rate of the liquid heating device, its noise is controlled.

[0059] In addition, the container body 10 is sometimes set as a detachable structure, that is, the container body 10 can be detached from the main structure of the liquid heating device to facilitate filling with liquid. At this time, a container cover 80 is often provided outside the container body 10 to shield other components directly connected to the container body 10, such as the coupler constituting the liquid outlet channel 20. The container cover 80 is often made of plastic material. To reduce the damage of the heating element to the container cover 80, it is necessary to ensure that there is a sufficient safety distance between the heating element and the container cover 80, usually at least greater than 5 mm. For a liquid heating device with a liquid outlet 11 provided on the bottom wall of the container body 10 and communicating with the liquid outlet channel 20, such as an electric thermos, the container body 10 usually has a relatively large volume, so the overall size of the liquid heating device is relatively large, which will occupy more lateral space in the home environment and is more sensitive to the lateral size. When these two factors are superimposed, if the second heating element 32 is directly arranged on the outer surface of the side wall of the existing container body, it is necessary to correspondingly increase the size of the container cover 80 to reserve the installation space and safety distance for the second heating element 32, which will cause a significant increase in the lateral size of the liquid heating device. By designing the side wall of the container body 10 to include a main section 12 and a shrinking section 13 that shrinks inward, and arranging the second heating element 32 on the outer surface of the shrinking section 13, it is possible to make room for the installation space and safety distance of the second heating element 32 with almost no increase in the lateral size of the liquid heating device, ensuring the appropriate size of the liquid heating device.

[0060] In some embodiments, optionally, the first heating element 31 and the second heating element 32 are spaced apart in the height direction of the container body 10, and the value range of the height interval between the first heating element 31 and the second heating element 32 is 2 mm to 40 mm, such as 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm.

[0061] In these embodiments, by defining the minimum interval between the first heating element 31 and the second heating element 32 in the height direction, i.e., 2 mm, a basic dispersed heating effect can be ensured. By defining the maximum interval between the first heating element 31 and the second heating element 32 in the height direction, i.e., 40 mm, on the one hand, the height difference of the heating position can be reasonably controlled, reducing the risk that it is difficult for the second heating element 32 to effectively heat when the position of the second heating element 32 is too high and the liquid level is too low. On the other hand, the height of the contraction section 13 can be correspondingly controlled, which not only helps to control the overall height of the machine but also reduces the impact of the excessive height of the contraction section 13 on the structure and strength of the container body 10, ensuring the reliable use of the product. As an example, the number of the second heating elements 32 is at least one and can be reasonably set according to actual needs. When the number of the second heating elements 32 is greater than or equal to two, different second heating elements 32 can be spaced apart along the height direction of the container body 10. It should be understood that at this time, the height interval between the lowest-set second heating element 32 and the first heating element 31 needs to meet the above value range, and the height interval between two adjacent second heating elements 32 should also meet the above value range. However, the height intervals between all pairs of heating elements do not need to be equal, that is, the height interval between the first heating element 31 and the second heating element 32 does not need to be equal to the height interval between two second heating elements 32, and when the number of the second heating elements 32 is greater than or equal to three, these second heating elements 32 do not need to be evenly distributed at the same height interval.

[0062] In some embodiments, optionally, the heating assembly 30 is distributed below a preset height of the container body 10, and the value range of the preset height is 45% to 80% of the height of the container body 10, such as 50%, 55%, 60%, 65%, 70%, 75%.

[0063] In these embodiments, the overall setting height of the heating assembly 30 is limited to a certain proportion below the height of the container body 10, that is, the heating heat source is concentratedly distributed below a certain height of the container body 10. By specifically using the proportion of the height of the container body 10 to define this height condition, it can adapt to container bodies 10 with different specific heights, improving the adaptability of the solution. For the value range of this proportion, its lower limit value, i.e., 45%, leaves enough height space for the distribution of the heating assembly 30, which helps to fully disperse the heat source; its upper limit value, i.e., 80%, can limit the heating assembly 30 below the common liquid level, thereby reducing the risk that it is difficult to effectively heat when the liquid level is lower than some heating elements, and helping to ensure the reliable operation of the liquid heating device.

[0064] In some embodiments, optionally, the first heating element 31 includes a first heating tube, the second heating element 32 includes a second heating tube, and the openings of the first heating tube and the second heating tube face different directions.

[0065] In these embodiments, by specifically using heating tubes as the first heating element 31 and the second heating element 32, that is, adopting conventional heating elements, it helps to control the product cost. Due to its structural limitations, a heating tube is often an arc-shaped structure, that is, it presents as a ring with an opening. By making the openings of the first heating tube and the second heating tube face in different directions, heat dispersion in the circumferential direction can be achieved, which helps to reduce noise and improve the noise reduction effect. As an example, the opening directions of each heating tube can be distributed approximately evenly in the circumferential direction. For example, when the number of the second heating tubes is one, the opening directions of the first heating tube and the second heating tube can be exactly opposite. Specifically, the connection line between the midpoint of the opening and the central axis of the container body 10 in the horizontal plane can be denoted as the orientation reference line. At this time, the orientation reference lines of each heating tube start from the central axis of the container body 10 in the horizontal plane and are radially arranged, and the angle between adjacent two orientation reference lines is approximately equal to the ratio of 360° or 2π to the number of orientation reference lines (i.e., the number of heating tubes). It should be understood that "approximately" means that strict uniform distribution is not required and reasonable errors are allowed.

[0066] As Figures 2 to 4 shown, in some embodiments, optionally, the contraction section 13 includes a bending section 131 and a columnar section 132. The bending section 131 extends from the main body section 12 towards the inside of the container body 10, and the columnar section 132 is connected to the end of the bending section 131 far from the main body section 12. The second heating element 32 is located on the outer surface of the bending section 131.

[0067] In these embodiments, by designing the contraction section 13 to include the bending section 131 and the columnar section 132, a stepped contraction section 13 can be formed. At this time, the flat bending section 131 can provide a reliable setting plane for the second heating element 32, making it convenient to install the second heating element 32. As an example, when the number of the second heating elements 32 is multiple, multiple contraction sections 13 can be correspondingly provided to form a multi-step structure.

[0068] As Figures 5 to 7 shown, in some embodiments, optionally, the contraction section 13 includes an inclined section 133. The inclined section 133 extends from the main body section 12 towards the inside of the container body 10 and simultaneously extends along the height direction of the container body 10. The second heating element 32 is located on the outer surface of the inclined section 133.

[0069] In these embodiments, by designing the contraction section 13 as the inclined section 133, on the one hand, the size of the contraction section 13 can be gradually changed to improve the structural stability, and on the other hand, a large inclined surface can be used to provide sufficient setting space for the second heating element 32, improving the inclusiveness of the number of the second heating elements 32 that can be set.

[0070] In some embodiments, optionally, the contraction section 13 is connected to the bottom wall of the container body 10.

[0071] In these embodiments, since the contraction section 13 contracts towards the inside of the container body 10 relative to the main body section 12, the transverse dimension of the contraction section 13 will be smaller than that of the main body section 12, which may affect the structural strength of the container body 10. Specifically, whether the contraction section 13 is stepped or inclined, as long as it is embedded in the main body section 12 away from the bottom wall, there will inevitably be a position where the cross-section of the container body 10 suddenly decreases, which may cause stress concentration here. By arranging the contraction section 13 at the bottom of the container body 10 and connecting it to the bottom wall of the container body 10, the bottom wall can provide support for the contraction section 13, which helps to enhance the structural strength of the container body 10.

[0072] In some embodiments, optionally, the heating power of the second heating element 32 is greater than that of the first heating element 31.

[0073] In these embodiments, since the bottom wall of the container body 10 is connected to the contraction section 13 with a transverse dimension smaller than that of the main body section 12, the area of the bottom wall will be reduced, and the size of the first heating element 31 will also be correspondingly smaller than that of the second heating element 32. By allocating a greater heating power to the relatively larger-sized second heating element 32, it is more conducive to dispersing the heat of the heating element, which helps to reduce the noise during the heating process. As an example, when the number of the second heating elements 32 is multiple and their sizes are the same, the heating powers of each of the second heating elements 32 can be equal. When the number of the second heating elements 32 is multiple and their sizes are different, the heating powers of each of the second heating elements 32 can be unequal and are positively correlated with their sizes.

[0074] As Figure 3 、 Figure 4 、 Figure 6 and Figure 7 shown, in some embodiments, optionally, the liquid heating device further includes a heat conducting member 40, which covers the outer surface of the bottom wall of the container body 10 and at least a part of the outer surface of the contraction section 13, and the first heating element 31 and the second heating element 32 are arranged on the surface of the heat conducting member 40 facing away from the container body 10.

[0075] In these embodiments, by making the heat conducting member 40 cover both the outer surface of the bottom wall of the container body 10 and at least a part of the outer surface of the contraction section 13, it can not only ensure that both the first heating element 31 and the second heating element 32 are in contact with the heat conducting member 40 to play a heat conducting role, but also increase the heat conducting area, which helps to strengthen the heat dispersion and reduce the noise during the heating process. As an example, usually, the size of the heat conducting member 40 exceeds the heating element by about 4 mm to 5 mm. For the inclined contraction section 13, due to relatively sufficient space, the size of the heat conducting member 40 exceeding the second heating element 32 can be appropriately increased, so as to further increase the heat conducting area.

[0076] As Figure 4and Figure 7 As shown, in some embodiments, optionally, the heating component 30 further includes a third heating element 33. The third heating element 33 is a flexible component and is laid on the outer surface of the main body section 12. The heating power of the third heating element 33 is less than that of the first heating element 31 and the second heating element 32.

[0077] In these embodiments, by additionally adding the flexible third heating element 33 laid on the outer surface of the main body section 12, the heating power can be further increased, and the effects of dispersed heating and noise reduction can be improved. At this time, since the third heating element 33 is a flexible component and occupies a small lateral space, it can be arranged on the outer surface of the main body section 12 without significantly affecting the lateral dimension of the liquid heating device. It should be understood that the aforementioned safety distance still needs to be left between the third heating element 33 and the plastic housing, but the influence on the lateral dimension of the liquid heating device is small. In addition, even if the overall installation height of the heating component 30 is controlled, there may still be a situation where the liquid level does not completely exceed all heat sources. For example, the liquid level is lower than the highest point of the third heating element 33, resulting in the liquid level not completely exceeding the third heating element 33. By allocating the minimum heating power to the third heating element 33, the adverse effects caused when such a situation occurs can be reduced. As an example, the third heating element 33 can be a heating tape or a heating film.

[0078] As Figure 2 and Figure 5 shown, in some embodiments, optionally, the liquid heating device further includes at least one liquid level sensor 50 and a controller (not shown in the figure). At least one liquid level sensor 50 is arranged on the side wall of the container body 10, and at least one liquid level sensor 50 is arranged above at least one of the second heating element 32 and the third heating element 33 along the height direction of the container body 10. For example Figure 4 as shown, a first liquid level sensor 50a is arranged above the second heating element 32, and a second liquid level sensor 50b is arranged above the third heating element 33; the controller is connected to at least one liquid level sensor 50, the first heating element 31, the second heating element 32, and the third heating element 33. The controller is configured to control the heating element corresponding to any liquid level sensor 50 to stop heating when it detects that the liquid level in the container body 10 is lower than the detection height of any liquid level sensor 50 among at least one liquid level sensor 50. It should be understood that the controller can also be connected to the aforementioned operation panel 70.

[0079] In these embodiments, by disposing a liquid level sensor 50 above at least one heating element, it is possible to determine that the liquid level exceeds the corresponding heating element when the detected liquid level reaches a corresponding height. Then, the controller executes control to stop the heating of the heating elements not exceeded by the liquid level, thereby reducing the risk of dry burning in the corresponding area of the container body 10 and ensuring the reliability of the use of the liquid heating device. It should be understood that at this time, the controller also controls the heating elements exceeded by the liquid level to continue heating. Combining with the embodiment in which the heating power of the third heating element 33 is less than that of the first heating element 31 and the second heating element 32, even if the third heating element 33 stops heating at this time, due to its relatively small heating power, the loss of the overall heating power is also relatively small, which can weaken the influence on the heating rate and help ensure the heating rate. It should be understood that for the first heating element 31, an existing solution can be adopted to prevent dry burning.

[0080] As Figure 4 and Figure 7 shown, in some embodiments, optionally, two positioning ribs 14 (including a first positioning rib 14a and a second positioning rib 14b) are provided on the outer surface of the main body section 12. The two positioning ribs 14 are spaced apart along the height direction of the container body 10, and the third heating element 33 is located between the two positioning ribs 14.

[0081] In these embodiments, by providing the positioning ribs 14 for positioning the third heating element 33 on the outer surface of the main body section 12, the position movement or detachment of the third heating element 33 can be reduced, ensuring the reliability of the overall structure. As an example, a single positioning rib 14 can be continuously distributed along the entire circumference of the container body 10 to form a closed ring, or can include a plurality of sections spaced apart along the circumference of the container body 10, both of which can play a role in positioning the third heating element 33, and the present invention does not limit this.

[0082] Next, a liquid heating device according to a specific embodiment of the present invention will be introduced.

[0083] As Figure 1 shown, the liquid heating device is an electric thermos, specifically a three-dimensional heating electric thermos, which distributes the power for heating in different areas of the container body 10, reduces the power of a single heating element, increases the total heating power, realizes the rapid heating of the electric thermos, and simultaneously reduces the noise during boiling water.

[0084] As Figures 2 to 4 shown, the electric thermos mainly includes a container body 10, a first heating element 31 (specifically a first heating tube), a second heating element 32 (specifically a second heating tube), a heat conducting member 40 (specifically an aluminum disc), a third heating element 33 (specifically a heating belt), and a liquid level sensor 50. Next, they will be introduced separately.

[0085] ①Container body 10: When installing multiple heating tubes in different areas of the container body 10, to ensure that the volume of the container body 10 remains unchanged and the plastic container cover 80 outside the container body 10 can withstand the high temperature of the heating tubes, the distance between the container cover 80 and the heating tubes needs to be increased (the closest distance between the heating tubes and the container cover 80 is greater than 5 mm), which will lead to an increase in the size of the container cover 80 and the overall size of the machine, making the product look bulky. Therefore, the bottom of the container body 10 is designed to be stepped, that is, the container body 10 includes a main body section 12 and a stepped contraction section 13. The contraction section 13 includes a connected bending section 131 and a columnar section 132. The first heating tube is brazed at the bottom of the container body 10, and the second heating tube is brazed on the stepped platform, which can avoid the heating tubes being too close to the container cover 80. At this time, the remaining height of the step after removing the second heating tube is greater than 2 mm, that is, the interval between the first heating tube and the second heating tube in the height direction is greater than 2 mm. Brazing multiple heating tubes in a stepped manner can effectively increase the distance between the two tubes, reduce the possibility of bubbles generated during boiling water being too close and the bubbles bursting together resulting in excessive noise. On the outer surface of the waist of the container body 10, two positioning ribs 14 are provided to facilitate the installation of the heating belt and prevent the heating belt from falling off. The position height of the positioning ribs 14 is lower than the highest water level line of the container body 10 and higher than the contraction section 13.

[0086] ②Aluminum pan: The aluminum pan wraps the area at the bottom of the container body 10 where the heating tubes are arranged, which can increase the heating area of the container body 10, avoid heat concentration, and reduce noise.

[0087] ③Heating tubes: Since there is a relatively long distance at the end of the heating tubes without heating, installing the two heating tubes opposite to each other can make the heat generated by the two heating tubes more dispersed and have a better noise reduction effect. The total power of the three-dimensional heating electric water bottle is 1200W to 2200W. The total power is split into three or more heating elements, and the heating power of the second heating tube > the heating power of the first heating tube > the heating power of the heating belt. Since the diameter of the second heating tube is larger than that of the first heating tube, it is more conducive to dispersing the heat of the heating tubes and can reduce the noise during boiling water.

[0088] ④Heating belt: The waist is heated by a heating belt, and its heating power is relatively low and only serves as auxiliary heating. However, its cost is low, and it is also convenient for installation and control, which can reduce the increase in the size of the container cover 80. In addition, since the position of the heating belt is relatively high, when the water level is lower than the heating belt, the heating belt cannot heat, and its small power can avoid too much reduction in the heating power, resulting in too slow boiling speed.

[0089] ⑤Liquid level sensor 50: Liquid level sensors 50 are respectively provided at the upper ends of the second heating tube and the heating belt. When it is detected that there is water above the heating belt, the heating belt will start the heating function. When it is detected that there is water at the upper end of the second heating tube, the second heating tube will start the heating function, which can avoid dry burning of the heating belt and the second heating tube when there is no water.

[0090] Next, a liquid heating device of another specific embodiment of the present utility model will be introduced.

[0091] As Figures 5 to 7 shown, the difference between this specific embodiment and the previous one lies in that the contraction section 13 of the container body 10 includes an inclined section 133, that is, it is inclined. At this time, the second heating tube is brazed on the inclined surface formed by the inclined section 133, and its effect is the same as that of the stepped contraction section 13. However, since the support columns for welding can be directly arranged at the bottom, it is more convenient for welding the aluminum disc.

[0092] Although the embodiments of the present utility model have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present utility model without departing from the spirit and scope of the present utility model. It should be understood that in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present utility model defined by the claims.

Claims

1. A liquid heating device, characterized in that, The liquid heating device includes: A container body (10) for containing liquid. The container body (10) includes a bottom wall and a side wall connected to each other. The bottom wall of the container body (10) is provided with a liquid outlet (11). The side wall of the container body (10) includes a main body section (12) and a contraction section (13) connected in the height direction. The contraction section (13) contracts towards the inside of the container body (10) relative to the main body section (12). A heating component (30), including a first heating element (31) and a second heating element (32). The first heating element (31) is located on the outer surface of the bottom wall of the container body (10), and the second heating element (32) is located on the outer surface of the contraction section (13).

2. The liquid heating device according to claim 1, characterized in that The first heating element (31) and the second heating element (32) are spaced apart in the height direction of the container body (10), and the value range of the height interval between the first heating element (31) and the second heating element (32) is 2 mm to 40 mm.

3. The liquid heating device according to claim 1, characterized in that The heating component (30) is distributed below a preset height of the container body (10), and the value range of the preset height is 45% to 80% of the height of the container body (10).

4. The liquid heating device according to claim 1, characterized in that The first heating element (31) includes a first heating tube, the second heating element (32) includes a second heating tube, and the openings of the first heating tube and the second heating tube face different directions.

5. The liquid heating device according to claim 1, characterized in that The contraction section (13) is connected to the bottom wall of the container body (10).

6. The liquid heating device according to claim 1, characterized in that The heating power of the second heating element (32) is greater than the heating power of the first heating element (31).

7. The liquid heating device according to claim 1, characterized in that The liquid heating device further includes a heat conducting member (40) covering at least part of the outer surface of the bottom wall of the container body (10) and the contraction section (13). The first heating element (31) and the second heating element (32) are provided on a surface of the heat conducting member (40) facing away from the container body (10).

8. The liquid heating device according to any one of claims 1 to 7, characterized in that The heating component (30) further includes a third heating element (33). The third heating element (33) is a flexible member and is laid on the outer surface of the main body section (12), and the heating power of the third heating element (33) is less than the heating powers of the first heating element (31) and the second heating element (32).

9. The liquid heating device according to claim 8, characterized in that The outer surface of the main body section (12) is provided with two positioning ribs (14), the two positioning ribs (14) are spaced apart along the height direction of the container body (10), and the third heating element (33) is located between the two positioning ribs (14).

10. The liquid heating device according to claim 8, characterized in that, The liquid heating device further includes: at least one liquid level sensor (50), provided on the side wall of the container body (10), and the at least one liquid level sensor (50) is arranged above at least one of the second heating element (32) and the third heating element (33) along the height direction of the container body (10); and a controller, connected to the at least one liquid level sensor (50), the first heating element (31), the second heating element (32), and the third heating element (33), and the controller is configured to control the heating element corresponding to any one of the liquid level sensors (50) to stop heating when it is detected that the liquid level in the container body (10) is lower than the detection height of any one of the at least one liquid level sensor (50).

11. The liquid heating device according to any one of claims 1 to 7, wherein the contraction section (13) includes a bending section (131) and a columnar section (132), the bending section (131) extends from the main body section (12) towards the inside of the container body (10), the columnar section (132) is connected to one end of the bending section (131) away from the main body section (12), and the second heating element (32) is located on the outer surface of the bending section (131); and / or the contraction section (13) includes an inclined section (133), the inclined section (133) extends from the main body section (12) towards the inside of the container body (10) and extends along the height direction of the container body (10) at the same time, and the second heating element (32) is located on the outer surface of the inclined section (133).

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