Liquid heating container

Abstract

The utility model relates to a liquid heating container which comprises a kettle body and a heating disc, the heating disc comprises a base body and a heating film, a containing cavity is defined by the kettle body and the base body, the heating film is arranged on the base body and located outside the containing cavity, and the heating efficiency of the liquid heating container can be improved by adopting the heating film high in heating efficiency and speed to heat liquid. The liquid heating container further comprises a first conductive part, a second conductive part and a circuit board, at least part of the first conductive part and at least part of the second conductive part are both located in the containing cavity and electrically connected with the liquid in the containing cavity and the circuit board to form a closed liquid level detection loop, and when the liquid in the containing cavity is reduced and the liquid level is lowered, the liquid level is detected. The first conductive part and / or the second conductive part can be separated from the liquid to cause disconnection of the liquid level detection loop, the single chip microcomputer controls the heating film to stop heating, the risk that the local temperature of the heating film rapidly rises to reach the dry burning limit due to the fact that the liquid is rapidly evaporated to dryness through the heating film is reduced, and the risk that the liquid heater is damaged or even fires due to the high temperature is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a liquid heating container. Background Art

[0002] The liquid heating container includes a kettle body and a heating plate installed on the kettle body. The heating plate and the kettle body form a receiving cavity for receiving liquid. When the liquid heating container is working, the heating film on the heating plate is connected to the power supply and the temperature rises and transfers the temperature to the liquid, thereby heating the liquid. Usually, a thermistor for detecting temperature is installed on the heating plate. When the liquid level in the receiving cavity is high, the thermistor contacts the liquid. At this time, the thermistor is used to detect the temperature of the liquid. When the liquid level in the receiving cavity is low, the thermistor is separated from the liquid and contacts the air in the receiving cavity. At this time, the thermistor is used to detect the temperature of the air in the receiving cavity. When the temperature of the air rises to the judgment threshold of the circuit board, the circuit board determines that the liquid heating container is in a dry-burning state and controls the heating film to stop heating. The reaction of the thermistor is slow, that is, before the temperature of the air rises to the threshold, there is a problem that the liquid in the receiving cavity is evaporated and the heating film quickly reaches the dry-burning limit. That is, the temperature is detected by a thermistor to determine whether the liquid heater is in a dry-burning state, and there is a risk that the liquid heater is damaged or even catches fire due to dry-burning. Utility Model Content

[0003] The present application provides a liquid heating container, which can reduce the risk of damage or even fire of the liquid heating container due to dry burning.

[0004] The present application provides a liquid heating container, which includes a pot body and a heating plate, the heating plate includes a base and a heating film, the pot body and the base form a accommodating cavity, the heating film is arranged on the base, and the heating film is located outside the accommodating cavity; the liquid heating container also includes a first conductive member, a second conductive member and a circuit board, the first conductive member and the second conductive member are both installed on the base, at least a portion of the first conductive member and at least a portion of the second conductive member are both located in the accommodating cavity, and the first conductive member and the second conductive member are both electrically connected to the circuit board.

[0005] The liquid heating container provided by the present application, when in a heating or heat preservation state, the heating film is connected to the power supply and starts to heat the liquid in the accommodating chamber. The first conductive member, the liquid in the accommodating chamber, the second conductive member and the circuit board form a closed liquid level detection circuit. When the liquid in the accommodating chamber decreases and the liquid level decreases, the first conductive member and / or the second conductive member will separate from the liquid, thereby causing the liquid level detection circuit to be disconnected. Thereafter, the single-chip machine electrically or signal-connected to the circuit board will control the heating film to stop heating. That is, the liquid level in the accommodating chamber is detected by the liquid level detection circuit. When the liquid level drops to the threshold, the heating film stops heating. At this time, the amount of liquid in the accommodating chamber is relatively large, which reduces the risk of the heating film quickly evaporating the liquid and causing the heating film to quickly reach the dry-burning limit.

[0006] In the prior art, whether the liquid heating container is in a dry-burning state is judged only by temperature detection by thermistors. That is, when the liquid level is lowered, the thermistor is exposed to the air and is used to detect the temperature of the air in the containing cavity. When the temperature reaches the threshold, the heating film is controlled to stop heating. However, the thermistor reacts slowly. That is, before the air temperature rises to the threshold, there is a problem that the liquid in the containing cavity is evaporated, causing the heating film to quickly reach the dry-burning limit.

[0007] Therefore, the present application can solve the problem that the liquid is quickly evaporated before the heating film stops heating, causing the heating film to quickly reach the dry burning limit, thereby reducing the risk of damage or even fire of the liquid heater due to high temperature, thereby improving the safety of use of the liquid heating container.

[0008] Furthermore, the liquid heating container provided in the present application uses a heating film to heat the liquid. Compared with the heating tube, the heating film has the characteristics of high heating efficiency and fast speed. Therefore, the heating time efficiency of the liquid heating container provided in the present application is higher.

[0009] In a possible design, along a first direction, the heating film is located between the first conductive member and the second conductive member, and the first direction is a distribution direction of the first conductive member and the second conductive member.

[0010] In the present application, since the heating film is located between the first conductive part and the second conductive part, when the liquid in the accommodating cavity is less and the kettle body is tilted toward the side where the first conductive part or the second conductive part is located, taking the kettle body tilting toward the side where the first conductive part is located as an example, the second conductive part will be exposed to the air and separated from the liquid, so that the liquid level detection circuit is disconnected, so that the single-chip microcomputer controls the heating film to stop heating, reducing the risk of the heating film reaching the dry burning limit due to the tilt of the kettle body, and further improving the safety of the liquid heating container.

[0011] In a possible design, along the first direction, a distance L1 between the first conductive member and the second conductive member satisfies: L1 ≥ 50 mm.

[0012] In the present application, L1 ≥ 50 mm, which can increase the size of the heating film and improve the heating efficiency of the heating film, thereby improving the working efficiency of the liquid heating container.

[0013] In a possible design, along the first direction, the distance L2 between the first conductive member and the heating film satisfies: L2 ≥ 8 mm; along the first direction, the distance L3 between the second conductive member and the heating film satisfies: L3 ≥ 8 mm.

[0014] In the present application, L2≥8mm, which increases the installation space of the first conductive member, reduces the installation difficulty of the first conductive member, and reduces the risk of the fastener damaging the heating film, thereby facilitating the improvement of the service life of the heating film. L3≥8mm, which increases the installation space of the second conductive member, reduces the installation difficulty of the second conductive member.

[0015] In a possible design, the first conductive member includes a first conductive body and a first probe, and the liquid heating container includes a first insulating member, which is mounted on the first conductive body to insulate the first conductive body from the substrate.

[0016] In the present application, the first insulating member insulates the first conductive body from the substrate, reducing the risk of the first conductive body being short-circuited by the substrate and the liquid in the containing cavity, thereby extending the service life of the first conductive body and improving the accuracy and reliability of the first conductive body's detection of the temperature and liquid level of the liquid.

[0017] In a possible design, the first insulating part includes a first insulating body located in the accommodating cavity, along the second direction, one side of the first insulating body abuts against the base, and the other side of the first insulating body abuts against the first probe, and the second direction is the height direction of the liquid heating container; along the second direction, the thickness H1 of the first insulating body satisfies: H1 ≥ 2 mm.

[0018] In the present application, if the thickness of the first insulating body is small, the risk of rapid evaporation of the liquid under the heating of the heating film is high, and the heat of the heating film is easily transferred slowly to the air, causing the heating film to be damaged or even catch fire. Therefore, H1 ≥ 2mm can extend the service life of the heating film and help further improve the safety of the liquid heating container.

[0019] In a possible design, along the second direction, an end of the first probe away from the first insulating body is the first end, and a distance H2 between the first end and the first insulating body in the second direction satisfies: H2≤5mm.

[0020] In this application, if the distance between the first end and the first insulating body is large, there is a risk that the first end will be exposed to the air before the liquid level drops below the first probe, resulting in low accuracy of the thermistor in detecting the liquid temperature, and there is a risk that the microcontroller controls the heating film to continue heating, causing the remaining liquid to evaporate faster. Therefore, H2≤5mm improves the accuracy and reliability of the thermistor's detection of the liquid temperature, thereby improving the accuracy of the temperature control of the heating film.

[0021] In a possible design, the second conductive member includes a second conductive body and a second probe, and the liquid heating container includes a second insulating member, which is mounted on the second conductive body to insulate the second conductive body from the substrate.

[0022] In the present application, the second insulating member insulates the second conductive body from the substrate, reducing the risk of the second conductive body being short-circuited by the substrate and the liquid in the accommodating cavity, thereby extending the service life of the second conductive body and improving the accuracy and reliability of the second conductive body's detection of the liquid level height.

[0023] In a possible design, the end of the second probe away from the second insulating member is the second end, the distance between the second end and the substrate in the second direction is H3, and H1 and H3 satisfy: H3

[0024] In the present application, H3

[0025] In one possible design, an extension portion extending toward the substrate is provided on the second probe along the second direction; the substrate is made of an insulating material, and the extension portion abuts against the substrate in the second direction; or, an insulating coating is provided on the substrate, the insulating coating is located in the accommodating cavity, and the extension portion abuts against the insulating coating.

[0026] In the present application, the extension portion is directly in contact with the substrate, or the extension portion is in contact with the insulating coating on the substrate, thereby increasing the contact area between the second probe and the liquid in the second direction. When the liquid level is above the first insulating body, the risk of separation of the second probe from the liquid due to tilt of the container body is reduced, thereby reducing the risk of misjudging the liquid level height due to tilt of the container body, thereby improving the accuracy and reliability of liquid level detection.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 ​​A schematic diagram of the structure of a liquid heating container provided in the present application in one embodiment;

[0029] Figure 2 for Figure 1 A top view of

[0030] Figure 3 for Figure 1 A cross-sectional view of

[0031] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0032] Figure 5 for Figure 3 Bottom view of the local structure;

[0033] Figure 6 for Figure 4 A partial enlarged view of part A;

[0034] Figure 7 for Figure 6 A schematic diagram of the matching structure of the first conductive member and the first insulating member;

[0035] Figure 8 for Figure 4 A partial enlarged view of part B;

[0036] Fig. 9 for Figure 8 Schematic diagram of the matching structure of the second conductive part and the second insulating part.

[0037] Reference numerals:

[0038] 1- Pot body;

[0039] 2-Heating plate;

[0040] 21-matrix;

[0041] 22-heating film;

[0042] 3-accommodating cavity;

[0043] 4- a first conductive member;

[0044] 41-a first conductive body;

[0045] 42-first probe;

[0046] 421-first end;

[0047] 5- a second conductive member;

[0048] 51- a second conductive body;

[0049] 52-second probe;

[0050] 521-second end;

[0051] 522- extension;

[0052] 6- Circuit board;

[0053] 7- a first insulating member;

[0054] 71- first insulating body;

[0055] 72- second insulating body;

[0056] 8- second insulating member;

[0057] 81- third insulating body;

[0058] 82- fourth insulating body;

[0059] 9- Thermal insulation cotton;

[0060] 10- reflector;

[0061] 20- bottom cover;

[0062] 30-upper cover;

[0063] 40- Base.

[0064] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0065] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0066] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0067] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0068] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0069] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0070] The present application embodiment provides a liquid heating container, such as Figure 1 As shown, the liquid heating container includes a container body and a base 40. The container body can be placed on the base 40. The base 40 includes a heating area and a functional area. The heating area is used to support the container body. The functional area is arranged on the outside of the heating area for setting buttons, knobs, touch screens, etc., so that users can control the working state of the liquid heating container. For example, users can control the liquid heating container to perform heating, insulation, reservation, timing and other functions through the buttons in the functional area.

[0071] like Figure 2 As shown, the container body includes a kettle body 1 and a heating plate 2, the kettle body 1 and the heating plate 2 form a containing cavity 3 for containing liquid, along the second direction Z, a bottom cover 20 is provided on the side of the heating plate 2 away from the kettle body 1, the bottom cover 20, the kettle body 1 and the heating plate 2 form a cavity for installing electronic components, and an upper cover 30 is provided on the side of the kettle body 1 away from the heating plate 2, the upper cover 30 can be covered on the kettle body 1, and is used to close the containing cavity 3, reduce external impurities from entering the containing cavity 3 to contaminate the liquid, and also reduce the steam overflowing from the containing cavity 3 to scald the user, thereby improving the safety of the liquid heating container.

[0072] like Figure 2 As shown, the heating plate 2 includes a base 21 and a heating film 22. The kettle body 1 and the base 21 form a receiving cavity 3. The heating film 22 is arranged on the base 21, and the heating film 22 is located outside the receiving cavity 3. Since the heating film 22 has high heating efficiency and fast speed, heating the liquid by using the heating film 22 can improve the heating efficiency of the liquid heating container, thereby shortening the waiting time of the user.

[0073] like Figures 2 to 5As shown, the container body also includes a first conductive member 4, a second conductive member 5 and a circuit board 6. The first conductive member 4 and the second conductive member 5 are both installed on the base 21. At least a portion of the first conductive member 4 and at least a portion of the second conductive member 5 are both located in the accommodating cavity 3 and are used to contact the liquid in the accommodating cavity 3. The circuit board 6 is arranged in the cavity, and the first conductive member 4 and the second conductive member 5 are both electrically connected to the circuit board 6.

[0074] When the liquid heater is working and in a heating or heat preservation state, the heating film 22 is powered on and starts to heat the liquid in the accommodating chamber 3. At the same time, the first conductive member 4, the liquid in the accommodating chamber 3, the second conductive member 5 and the circuit board 6 form a closed liquid level detection circuit. When the liquid in the accommodating chamber 3 decreases and the liquid level decreases, the first conductive member 4 and / or the second conductive member 5 will separate from the liquid, thereby causing the liquid level detection circuit to be disconnected. Thereafter, the single chip machine electrically or signal-connected to the circuit board 6 will control the heating film 22 to stop heating, that is, the liquid level in the accommodating chamber 3 is detected through the liquid level detection circuit. When the liquid level drops to the threshold, the heating film 22 stops heating. At this time, the amount of liquid in the accommodating chamber 3 is relatively large, which reduces the risk of the liquid being quickly evaporated and causing the heating film 22 to transfer heat to the air in the accommodating chamber. Since the temperature transfer rate between the heating film 22 and the liquid is faster than the temperature transfer rate between the heating film 22 and the air, the risk of the heating film quickly reaching the dry burning limit due to the rapid increase in the temperature of the heating film is reduced.

[0075] In the prior art, whether the liquid heating container is in a dry-burning state is judged only by temperature detection by thermistors. That is, when the liquid level is lowered, the thermistor is exposed to the air and is used to detect the temperature of the air in the containing cavity. When the temperature reaches the threshold, the heating film is controlled to stop heating. However, the thermistor reacts slowly. That is, before the air temperature rises to the threshold, there is a problem that the liquid in the containing cavity is evaporated, causing the heating film to quickly reach the dry-burning limit.

[0076] Therefore, the present application can solve the problem that the liquid is quickly evaporated before the heating film 22 stops heating, causing the heating film 22 to quickly reach the dry burning limit, thereby reducing the risk of damage or even fire of the liquid heater due to high temperature, thereby improving the safety of use of the liquid heating container.

[0077] Among them, the first conductive part 4 includes a metal shell and a thermistor arranged inside the metal shell. The thermistor is attached to the inner wall of the metal shell. The thermistor is electrically connected to the circuit board 6. The metal shell can transfer the temperature of the liquid in the accommodating chamber 3 to the thermistor, causing the resistance value of the thermistor to change. The single-chip microcomputer can judge the temperature of the liquid in the accommodating chamber 3 according to the change in the resistance value of the thermistor, thereby realizing functions such as heating, keeping warm or stopping heating of the liquid. Detecting the temperature of the liquid by the thermistor can improve the sensitivity of temperature detection.

[0078] Along the first direction X, the heating film 22 is located between the first conductive member 4 and the second conductive member 5; wherein the first direction X is the distribution direction of the first conductive member 4 and the second conductive member 5, for example, Figure 1 As shown, the first direction X is the length direction of the base 40 , the height direction of the base 40 is the second direction Z, and the width direction of the base 40 is the third direction Y.

[0079] Since the heating film 22 is located between the first conductive part 4 and the second conductive part 5, when the liquid in the accommodating chamber 3 is less and the kettle body 1 is tilted toward the side where the first conductive part 4 or the second conductive part 5 is located, taking the kettle body 1 tilting toward the side where the first conductive part 4 is located as an example, the second conductive part 5 will be exposed to the air and separated from the liquid, so that the liquid level detection circuit is disconnected, so that the single-chip microcomputer controls the heating film 22 to stop heating, reducing the risk of the heating film 22 reaching the dry burning limit due to the tilt of the kettle body 1, and further improving the safety of the liquid heating container.

[0080] like Figure 5 As shown, along the first direction X, the distance L1 between the first conductive member 4 and the second conductive member 5 satisfies: L1 ≥ 50 mm, and can be specifically 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm, 120 mm, 125 mm, 130 mm, 135 mm, 140 mm, etc.

[0081] If the distance between the first conductive member 4 and the second conductive member 5 is small, for example, L1 < 50 mm, the space between the first conductive member 4 and the second conductive member 5 for installing the heating film 22 is small, resulting in a smaller size of the heating film 22, thereby reducing the heating power of the heating film 22. Therefore, L1 ≥ 50 mm can increase the size of the heating film 22, improve the heating efficiency of the heating film 22, and further improve the working efficiency of the liquid heating container.

[0082] like Figure 5 As shown, along the first direction X, the distance L2 between the first conductive member 4 and the heating film 22 satisfies: L2≥8mm, and specifically can be 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, etc.; along the first direction X, the distance L3 between the second conductive member 5 and the heating film 22 satisfies: L3≥8mm, and specifically can be 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, etc.

[0083] The first conductive member 4 is fixed to the base 21 by fasteners such as screws or bolts. If the distance between the first conductive member 4 and the heating film 22 is small, for example, L2 < 8 mm, the installation space of the first conductive member 4 is small, which increases the difficulty of installing the first conductive member 4. At the same time, in the process of locking the fastener, there is a risk that the fastener will damage the heating film 22. Therefore, L2 ≥ 8 mm, which increases the installation space of the first conductive member 4, reduces the difficulty of installing the first conductive member 4, and reduces the risk of fasteners damaging the heating film 22, thereby facilitating the improvement of the service life of the heating film 22.

[0084] If the distance between the second conductive member 5 and the heating film 22 is small, for example, L3 < 8 mm, the installation space of the second conductive member 5 is small, which increases the difficulty of installing the second conductive member 5. Therefore, L3 ≥ 8 mm, which increases the installation space of the second conductive member 5 and reduces the difficulty of installing the second conductive member 5.

[0085] like Figure 4 , Figure 6 and Figure 7 As shown, the first conductive member 4 includes a first conductive body 41 and a first probe 42, and the liquid heating container includes a first insulating member 7, which is installed on the first conductive body 41 to insulate and isolate the first conductive body 41 from the substrate 21, thereby reducing the risk of the first conductive body 41 being short-circuited by the substrate 21 and the liquid in the accommodating cavity 3, thereby extending the service life of the first conductive body 41 and improving the accuracy and reliability of the first conductive body 41 in detecting the temperature and liquid level of the liquid.

[0086] like Figure 7 As shown, along the second direction Z, the end of the first probe 42 away from the first insulating body 71 is the first end 421 , and the thermistor is disposed at the first end 421 , that is, the thermistor is attached to the inner side wall of the first end 421 of the metal shell.

[0087] like Figure 7As shown, the first insulating member 7 includes a first insulating body 71 and a second insulating body 72. A first mounting hole is provided on the substrate 21. A portion of the second insulating body 72 is located in the first mounting hole and abuts against a side wall of the first mounting hole to seal the first mounting hole. The second insulating body 72 is located in the accommodating cavity 3. Along the second direction Z, one side of the first insulating body 71 abuts against the substrate 21, and the other side of the first insulating body 71 abuts against the first probe 42. Along the second direction Z, the thickness H1 of the first insulating body 71 satisfies: H1 ≥ 2 mm, and specifically can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, etc.

[0088] A first insulating body 71 is sandwiched between the first probe 42 and the base 21. The first insulating body 71 can increase the setting height of the first probe 42 to increase the depth of the first probe 42 inserted into the liquid, which is beneficial to improving the accuracy and reliability of the thermistor in the first probe 42 in detecting the temperature of the liquid. In addition, when the height of the liquid in the accommodating chamber 3 is lower than the height of the first probe 42, the first insulating body 71 insulates and isolates the liquid and the first probe 42, so that the liquid level detection circuit is disconnected, and the single-chip microcomputer controls the heating film 22 to stop heating, that is, the single-chip microcomputer can judge whether the liquid level reaches the preset lower limit by disconnecting or closing the liquid level detection circuit, reducing the risk of less liquid in the accommodating chamber 3, thereby reducing the risk of a small amount of liquid rapidly evaporating under the heating of the heating film 22, and further reducing the risk of the heating film 22 being exposed to the air, that is, reducing the risk of the heating film 22 slowly transferring heat to the air, so as to further extend the service life of the heating film 22, and is beneficial to further improve the safety of the use of the liquid heating container.

[0089] If the thickness of the first insulating body 71 is small, for example, H1 < 2 mm, the risk of rapid evaporation of the liquid under the heating of the heating film 22 is high, and the heating film 22 is easily exposed to the air, resulting in the risk of damage to the heating film 22 or even fire. Therefore, H1 ≥ 2 mm can extend the service life of the heating film 22 and help further improve the safety of the liquid heating container.

[0090] like Figure 7As shown, along the second direction Z, the distance H2 between the first end 421 and the first insulating body 71 in the second direction Z satisfies: H2≤5mm, and can specifically be 0.1mm, 0.5mm, 0.9mm, 1mm, 1.1mm, 1.5mm, 1.9mm, 2mm, 2.1mm, 2.5mm, 2.9mm, 3mm, 3.1mm, 3.5mm, 3.9mm, 4mm, 4.1mm, 4.5mm, 4.9mm, 5mm, etc.

[0091] If the distance between the first end 421 and the first insulating body 71 is large, for example, H2>5mm, there is a risk that the first end 421 is exposed to the air before the liquid level drops below the first probe 42, resulting in a low accuracy of the thermistor in detecting the liquid temperature, and there is a risk that the microcontroller controls the heating film 22 to continue heating, causing the remaining liquid to evaporate faster. Therefore, H2≤5mm improves the accuracy and reliability of the thermistor's detection of the liquid temperature, thereby improving the accuracy of the temperature control of the heating film 22.

[0092] like Figure 4 and Figure 8 As shown, the second conductive member 5 includes a second conductive body 51 and a second probe 52, and the liquid heating container includes a second insulating member 8, which is installed on the second conductive body 51 to insulate and isolate the second conductive body 51 from the substrate 21, thereby reducing the risk of the second conductive body 51 being short-circuited by the substrate 21 and the liquid in the accommodating chamber 3, thereby extending the service life of the second conductive body 51 and improving the accuracy and reliability of the second conductive body 51 in detecting the liquid level height.

[0093] In addition, the second conductive member 5 is grounded through the circuit board 6, which reduces the risk of electric shock when the user touches the circuit board 6, thereby improving the safety of the liquid heating container.

[0094] like Fig. 9 As shown, the second insulating member 8 includes a third insulating body 81 and a fourth insulating body 82. A second mounting hole is provided on the substrate 21. The third insulating body 81 is located in the second mounting hole and abuts against the side wall of the second mounting hole to seal the second mounting hole. Along the second direction Z, the fourth insulating body 82 is located between the second probe 52 and the substrate 21. The fourth insulating body 82 is clamped and fixed by the second probe 52 and the substrate 21.

[0095] like Fig. 9 As shown, the end of the second probe 52 away from the second insulating member 8 is the second end 521 , and the distance between the second end 521 and the heating plate 2 in the second direction Z is H3 , and H1 and H3 satisfy: H3

[0096] ​H3

[0097] like Fig. 9 As shown, along the second direction Z, the second probe 52 is provided with an extension portion 522 extending in a direction close to the substrate 21; the substrate 21 is made of an insulating material, and the extension portion 522 abuts against the substrate 21 in the second direction Z; or, an insulating coating is provided on the substrate 21, the insulating coating is located in the accommodating cavity 3, and the extension portion 522 abuts against the insulating coating.

[0098] The extension portion 522 directly abuts against the base 21, or the extension portion 522 abuts against the insulating coating on the base 21, thereby increasing the contact area between the second probe 52 and the liquid in the second direction Z. When the liquid level is above the first insulating body 71, the risk of the second probe 52 being separated from the liquid due to the tilt of the container body is reduced, thereby reducing the risk of misjudging the liquid level height due to the tilt of the container body, thereby improving the accuracy and reliability of the detection of the liquid level height.

[0099] Among them, the insulating coating is a food-grade mineral coating. When the liquid heating container is working, mineral elements such as calcium in the coating can enter the liquid to increase the mineral content in the liquid. At the same time, when the liquid is pure water, the ions dissolved in the liquid can solve the problem that the signal between the first conductive part 4 and the second conductive part 5 cannot be transmitted due to pure water, thereby reducing the risk that the single-chip microcomputer cannot judge the liquid level in the accommodating cavity 3, thereby improving the working stability of the first conductive part 4 and the second conductive part 5 and the safety of use of the liquid heating container.

[0100] In any of the above embodiments, the material of the substrate 21 is microcrystalline glass. The insulating property of the microcrystalline glass reduces the risk of the first conductive member 4 and the second conductive member 5 being short-circuited by the substrate 21, thereby improving the working stability and reliability of the first conductive member 4 and the second conductive member 5; in addition, in the plane enclosed by the first direction X and the third direction Y, the heat transfer effect of the microcrystalline glass is poor, that is, it is more difficult to transfer the temperature of the heating film 22 to the thermistor through the microcrystalline glass, thereby reducing the influence of the temperature of the heating film 22 on the resistance value of the thermistor, thereby improving the accuracy and reliability of the thermistor in detecting liquid temperature.

[0101] In any of the above embodiments, Figure 4 ​As shown, a reflective cover 10 is also provided in the cavity surrounded by the bottom cover 20, the kettle body 1 and the heating plate 2. The reflective cover 10 is fixed on the kettle body 1. The reflective cover 10 is used to reflect the heat radiated into the cavity by the heating film 22 back into the accommodating cavity 3, thereby reducing the heat loss of the heating film 22 and further improving the heating efficiency of the heating film 22 for the liquid.

[0102] like Figure 4 As shown, a heat insulating cotton 9 is arranged between the reflective cover 10 and the base 21. The heat insulating cotton 9 is clamped and fixed by the base 21 and the reflective cover 10. The heat insulating cotton 9 can reduce the temperature in the accommodating cavity 3 and transfer it to the cavity, thereby reducing the temperature loss in the accommodating cavity 3 and reducing the temperature drop rate of the liquid.

[0103] In any of the above embodiments, an outer shell can be provided on the outer side of the kettle body 1 so that the kettle body 1 can be used as an inner liner. The outer shell can reduce the risk of the temperature in the accommodating cavity 3 being transferred to the air through the kettle body 1, thereby reducing the temperature loss in the accommodating cavity 3 and the risk of being scalded by touching the kettle body 1, thereby improving the safety of the liquid heating container.

[0104] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid heating container, characterized in that: The liquid heating container comprises a kettle body (1) and a heating plate (2), the heating plate (2) comprises a base (21) and a heating film (22), the kettle body (1) and the base (21) form a receiving cavity (3), the heating film (22) is arranged on the base (21), and the heating film (22) is located outside the receiving cavity (3); The liquid heating container also includes a first conductive member (4), a second conductive member (5) and a circuit board (6); the first conductive member (4) and the second conductive member (5) are both mounted on the base (21); at least a portion of the first conductive member (4) and at least a portion of the second conductive member (5) are both located in the accommodating cavity (3); and the first conductive member (4) and the second conductive member (5) are both electrically connected to the circuit board (6).

2. The liquid heating container according to claim 1, characterized in that Along a first direction (X), the heating film (22) is located between the first conductive member (4) and the second conductive member (5), and the first direction (X) is the distribution direction of the first conductive member (4) and the second conductive member (5).

3. The liquid heating container according to claim 2, characterized in that Along the first direction (X), a distance L1 between the first conductive member (4) and the second conductive member (5) satisfies: L1 ≥ 50 mm.

4. The liquid heating container according to claim 2, characterized in that Along the first direction (X), a distance L2 between the first conductive member (4) and the heating film (22) satisfies: L2 ≥ 8 mm; Along the first direction (X), a distance L3 between the second conductive member (5) and the heating film (22) satisfies: L3 ≥ 8 mm.

5. The liquid heating container according to any one of claims 1 to 4, characterized in that: The first conductive member (4) includes a first conductive body (41) and a first probe (42), and the liquid heating container includes a first insulating member (7). The first insulating member (7) is installed on the first conductive body (41) to insulate and isolate the first conductive body (41) from the substrate (21).

6. The liquid heating container according to claim 5, characterized in that The first insulating member (7) comprises a first insulating body (71) located in the accommodating cavity (3); along a second direction (Z), one side of the first insulating body (71) abuts against the base (21), and the other side of the first insulating body (71) abuts against the first probe (42); the second direction (Z) is the height direction of the liquid heating container; Along the second direction (Z), the thickness H1 of the first insulating body (71) satisfies: H1 ≥ 2 mm.

7. The liquid heating container according to claim 6, characterized in that Along the second direction (Z), the end of the first probe (42) away from the first insulating body (71) is the first end (421), and the distance H2 between the first end (421) and the first insulating body (71) in the second direction (Z) satisfies: H2≤5mm.

8. The liquid heating container according to claim 6, characterized in that The second conductive member (5) includes a second conductive body (51) and a second probe (52), and the liquid heating container includes a second insulating member (8). The second insulating member (8) is installed on the second conductive body (51) to insulate and isolate the second conductive body (51) from the substrate (21).

9. The liquid heating container according to claim 8, characterized in that The end of the second probe (52) away from the second insulating member (8) is the second end (521), and the distance between the second end (521) and the substrate (21) in the second direction (Z) is H3, and H1 and H3 satisfy: H3<H1.

10. The liquid heating container according to claim 9, characterized in that Along the second direction (Z), the second probe (52) is provided with an extension portion (522) extending in a direction close to the substrate (21); The base (21) is made of insulating material, and the extension portion (522) abuts against the base (21) in the second direction (Z); Alternatively, an insulating coating is provided on the substrate (21), the insulating coating is located in the accommodating cavity (3), and the extending portion (522) abuts against the insulating coating.

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