Heating device

Abstract

The application discloses a heating device, comprising: a base, which is provided with a first area, a second area, a third area and a fourth area, each area corresponding to each quadrant of a plane rectangular coordinate system, the first area of the base being provided with a first heating body, the second area of the base being provided with a second heating body, the third area of the base being provided with a third heating body, and the fourth area of the base being provided with a fourth heating body; each heating body is provided with an electrode, and the corresponding heating body can be controlled to generate heat by applying voltage to the electrode on each heating body. The heating device has the characteristics of high controllability of heating power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating, in particular to a heating device. BACKGROUND

[0002] The heating device, such as a kettle, is usually heated by the heating body inside the kettle. The heating body is heated by the power supply, and the heat is transferred to the substance in the kettle. At present, the existing heating device is usually heated by a single heating body, and the heating power can only be adjusted by adjusting the voltage of the heating body. Through market research, it is found that some customers need to heat a small amount of different substances. Since the heating time and heating power of different substances have certain differences, it is difficult to control the heating power when using a single heating body heating device, that is, the controllability of the heating power of the heating device is small. SUMMARY

[0003] Therefore, the present application provides a heating device, which can increase the controllability of the heating power of the heating device.

[0004] The present application provides a heating device, which comprises:

[0005] A base is provided with a first area, a second area, a third area and a fourth area, each area corresponding to each quadrant of a plane rectangular coordinate system;

[0006] A first heating body is arranged in the first area, and a first electrode is arranged on the first heating body, and the first heating body is controlled to heat by the first electrode;

[0007] A second heating body is arranged in the second area, and a second electrode is arranged on the second heating body, and the second heating body is controlled to heat by the second electrode;

[0008] A third heating body is arranged in the third area, and a third electrode is arranged on the third heating body, and the third heating body is controlled to heat by the third electrode;

[0009] A fourth heating body is arranged in the fourth area, and a fourth electrode is arranged on the fourth heating body, and the fourth heating body is controlled to heat by the fourth electrode;

[0010] The base is further provided with four switch operating members, which are connected with the electrodes on the heating bodies respectively, and are used for controlling the corresponding heating bodies to heat.

[0011] Optionally, the base comprises a circuit board, and the circuit board is provided with:

[0012] A control unit is connected with the switch operating members on the base;

[0013] a first switch unit, a first end of which is connected with the control unit, a second end of which is connected with the first electrode, and a third end of which is connected with a power supply, for controlling the first heat generator to generate heat according to a first control signal outputted by the control unit;

[0014] a second switch unit, a first end of which is connected with the control unit, a second end of which is connected with the second electrode, and a third end of which is connected with a power supply, for controlling the second heat generator to generate heat according to a second control signal outputted by the control unit;

[0015] a third switch unit, a first end of which is connected with the control unit, a second end of which is connected with the third electrode, and a third end of which is connected with a power supply, for controlling the third heat generator to generate heat according to a third control signal outputted by the control unit;

[0016] a fourth switch unit, a first end of which is connected with the control unit, a second end of which is connected with the fourth electrode, and a third end of which is connected with a power supply, for controlling the fourth heat generator to generate heat according to a fourth control signal outputted by the control unit.

[0017] Optionally, each switch unit comprises a relay, and a control end of each relay is connected with the control unit, a first contact of each relay is connected with each heat generator, and a second contact of each relay is connected with a power supply.

[0018] Optionally, each heat generator comprises a first heating coil, and a first end and a tail end of the first heating coil are connected with the electrodes respectively.

[0019] Optionally, the cross-sectional areas of each first heating coil are the same.

[0020] Optionally, the cross-sectional areas of each first heating coil are different.

[0021] Optionally, the cross-sectional area of the first heating coil is in inverse proportion to the distance from the center point of the first heating coil to a first center, and the first center is a position on the base corresponding to the center point of the planar rectangular coordinate system.

[0022] Optionally, each heat generator comprises a second heating coil and a third heating coil, and the second heating coil and the third heating coil are arranged on the base around a second center, and the second center is the center point of each region.

[0023] Optionally, the cross-sectional area of the second heating coil is smaller than the cross-sectional area of the third heating coil.

[0024] Optionally, the first heat generator and the second heat generator are centrally symmetric, and the center of symmetry is a position on the base corresponding to the center point of the planar rectangular coordinate system.

[0025] The first heating element and the second heating element are centrally symmetrical, and the center of symmetry is the position on the base corresponding to the center point of the plane rectangular coordinate system.

[0026] In the above embodiments, each heating element is electrically connected to a power source through its electrodes. By controlling the energization of the corresponding electrodes, the heating of a single heating element or multiple heating elements can be controlled. Furthermore, by adjusting the voltage of one or more heating elements, the heating power of the heating device can be adjusted, achieving multi-dimensional heating power control. Attached Figure Description

[0027] Figure 1 This is a partial structural schematic diagram of a heating device according to an embodiment of this application;

[0028] Figure 2 This is a partial structural diagram of the base in the heating device;

[0029] Figure 3 This is a partial structural schematic diagram of a heating device according to another embodiment of this application;

[0030] Figure 4 This is a partial structural schematic diagram of the heating element in another embodiment of this application;

[0031] Figure 5 This is a partial structural schematic diagram of the heating element in another embodiment of this application;

[0032] Figure 6 This is a partial structural schematic diagram of the heating element in another embodiment of this application;

[0033] Figure 7 yes Figure 2 A schematic diagram of part of the circuit structure in the circuit board of the middle base;

[0034] Figure 8 This is a partial structural diagram showing the connection between the relay, control unit, and heating element.

[0035] Figure 9 This is a partial structural diagram of the first kettle body in the heating device;

[0036] Figure 10 yes Figure 9 The top view of the first pot body shown;

[0037] Figure 11 This is a top view of the second kettle body in the heating device. Detailed Implementation

[0038] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with embodiments and drawings. Obviously, the described embodiments are only some of the embodiments but not all. Based on the embodiments in the present application, the following various embodiments and their technical features can be combined with each other without conflict.

[0039] It should be understood that, in the description of the embodiments of the present application, the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the technical solutions of the corresponding embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] The present application provides a heating device, which refers to Figure 1 and Figure 2 which comprises a base 100, a first heating body 11, a second heating body 12, a third heating body 13 and a fourth heating body 14.

[0041] The base 100 is provided with a first area, a second area, a third area and a fourth area, each area corresponding to each quadrant of a planar rectangular coordinate system; the first heating body 11 is arranged in the first area and is provided with a first electrode 11b thereon and controls the first heating body 11 to heat through the first electrode 11b; the second heating body 12 is arranged in the second area and is provided with a second electrode 12b thereon and controls the second heating body 12 to heat through the second electrode 12b; the third heating body 13 is arranged in the third area and is provided with a third electrode 13b thereon and controls the third heating body 13 to heat through the third electrode 13b; the fourth heating body 14 is arranged in the fourth area and is provided with a fourth electrode 14b thereon and controls the fourth heating body 14 to heat through the fourth electrode 14b.

[0042] The base 100 can comprise a bottom substrate, which is covered with an insulating layer, and the insulating layer is prearranged with the first area, the second area, the third area and the fourth area corresponding to the planar rectangular coordinate system; the bottom substrate can be a plate body with a certain thickness and is placed and fixed in the recessed area of the base 100.

[0043] Each heating body is conductively connected with the power supply through the electrode thereon, and the corresponding electrode is controlled to be electrified to realize the control of a single heating body or multiple heating bodies to heat. In addition, by adjusting the voltage of one or more heating bodies, the heating power of the heating device can be adjusted to realize multi-dimensional heating power control.

[0044] In an embodiment, as shown in Figure 1 The heating bodies 11, 12, 13, 14 each include a first heating coil 11a, 12a, 13a, 14a, and the first heating coil has a head end and a tail end respectively connected with an electrode 11b, 12b, 13b, 14b. As a heating source, the first heating coil 11a, 12a, 13a, 14a can be arranged on the insulating layer of the base, and the first heating coil is arranged on the plane of the insulating layer in a winding manner, that is, each first heating coil 11a, 12a, 13a, 14a is arranged on the insulating layer in a winding manner.

[0045] The cross-sectional area of each first heating coil 11a, 12a, 13a, 14a can be the same, that is, the thickness of the first heating coil 11a, 12a, 13a, 14a in each region is the same.

[0046] Referring to Figure 3 , the cross-sectional area of each first heating coil 11a, 12a, 13a, 14a can also be different, that is, the thickness of the first heating coil 11a in each region is different. For example, the cross-sectional area of the first heating coil 11a in the first region is greater than that in the second region, the cross-sectional area of the first heating coil 11a in the second region is greater than that in the third region, the cross-sectional area of the first heating coil 11a in the third region is greater than that in the fourth region, of course, the cross-sectional area of the first heating coil 11a in each region can be set according to the user's usage frequency, and the cross-sectional area of the first heating coil 11a in the region with high usage frequency can be greater than that in the region with low usage frequency.

[0047] In order to reduce the area occupied by the first heating coil 11a, 12a, 13a, 14a, the first heating coil 11a, 12a, 13a, 14a can be wound along the shape of the bottom substrate of the base 100. The bottom substrate is a circular substrate, and the heating coil can be a heating coil wire, which is arranged in multiple circles as a whole.

[0048] The first heating coil 11a, 12a, 13a, 14a is connected to electricity through its corresponding electrode, generates heat under voltage drive, and the heat is directly transmitted to the medium such as water, ensuring high heating efficiency. The heating coil is distributed on the plane of the insulating layer in a winding manner, the distribution area of the heating coil is large, the generated heat is relatively dispersed, local overheating area is avoided, the time for the bubbles to expand and become large under heating is slowed down, the number of bubble breakage can be reduced, and the noise generated by boiling water can be reduced.

[0049] Since, when the four heat-generating bodies are controlled to generate heat at the same time, heat will be concentrated in the middle region of the base (i.e. the region close to the first center o among the four regions), so that the temperature of the middle region of the base is too high. Therefore, in an embodiment, the cross-sectional area of the first heating coil 11a, 12a, 13a, 14a is inversely proportional to the distance from the center point of the first heating coil 11a, 12a, 13a, 14a to the first center oo, which is the position on the base corresponding to the center point of the planar rectangular coordinate system. In other words, within the same first heating coil, such as within the first heating coil 11a, the closer to the center point between the four regions, the thinner the first heating coil 11a; the farther away from the first center o between the four regions, the thicker the first heating coil 11a.

[0050] According to the relationship 1-1 of Joule's law and the relationship 1-2 between resistance and heat, it can be known that the resistance of the wire is inversely proportional to the cross-sectional area, and the resistance of the wire is inversely proportional to the heat, so that the heat and the cross-sectional area are proportional.

[0051] Q = (U 2 / R)*t relationship 1-1

[0052] R = (p*L) / S relationship 1-2

[0053] Wherein, Q represents heat, the unit is Joule (J); U represents voltage, the unit is volt (V); R represents resistance, the unit is ohm (Ω); t represents time, the unit is second (s). p represents the resistivity of the wire, S represents the cross-sectional area of the wire, and L represents the length of the wire.

[0054] Therefore, in the same first heating coil 11a, 12a, 13a, 14a, the part with larger cross-sectional area generates more heat. Since the cross-sectional area of the first heating coil in the middle region of the base 100 is small, the heat generated is also small. Therefore, the heat in the middle region of the base 100 is less concentrated, which can reduce the temperature in the middle region of the base 100.

[0055] It can be understood that the structural design of the heating coil is not limited to Figure 1 The described embodiments, with reference to Figure 4 In another embodiment, the heat-generating body 11, 12, 13, 14 can include a second heating coil 11c and a third heating coil 11d (the embodiments of the present application and Figure 4For example, only the second heating coil 11c and the third heating coil 11d included in the heating body 11 are taken as an example to illustrate, and the second heating coil 11c and the third heating coil 11d are both arranged on the base 100 around the second center P1, P2, P3, P4, that is, each heating coil is arranged on the insulating layer in a circle by circle manner, so as to reduce the area occupied by the heating coil. The second center is the center point of each area. The first end and the tail end of the second heating coil 11c and the third heating coil 11d are both connected with the electrode 11e, 11f, and the second center P1, P2, P3, P4 is the center point of each area.

[0056] The second heating coil 11c and the third heating coil 11d are respectively connected to electricity through their corresponding electrodes 11e, 11f, generate heat under the voltage driving, and the heat is directly transmitted to the medium such as water, so as to ensure high heating efficiency. In addition, the heating coil is distributed on the plane of the insulating layer, the distribution area of the heating coil is large, the generated heat is relatively dispersed, the formation of local overheating area is avoided, the time of bubble expansion and enlargement under heating is slowed down, the number of bubble rupture can be reduced, and the noise generated by boiling water can be reduced.

[0057] Optionally, referring to Figure 5 , the cross-sectional area of the second heating coil 11c is smaller than the cross-sectional area of the third heating coil 11d.

[0058] According to the relationship formula 1-1 of Joule's law and the relationship formula 1-2 of resistance and heat, for two heating coils with the same resistivity, the second heating coil 11c is thinner, and the third heating coil 11d is thicker. Therefore, when receiving the same voltage, the heat generated by the second heating coil 11c is smaller, and the heat generated by the third heating coil 11d is larger.

[0059] Here, the second heating coil 11c and the third heating coil 11d work together, and the total heat generated is the sum of the heat generated by the second heating coil 11c and the heat generated by the third heating coil 11d, that is, the total heat generated Q0 is greater than the heat generated by any heating coil, Q0>Q2 and Q0>Q3, so as to facilitate rapid heating.

[0060] In addition, the second heating coil 11c and the third heating coil 11d serve as heating sources, and by intelligently adjusting the heat generated by the second heating coil 11c and the third heating coil 11d, when the water temperature is low at the initial stage, the water close to the heating source is not easy to be vaporized, and the two groups of heating coils can be made to work at the same time. When the water is heated to a certain temperature, only the thicker third heating coil 11d can be made to work, so as to reduce the possibility of vaporization of the water close to the heating source. When the water is heated to a higher temperature, only the thinner second heating coil 11c can be made to work, so as to reduce the possibility of vaporization of the water close to the heating source again.

[0061] For example, the power of the second heating coil 11c is 600W, and the power of the third heating coil 11d is 1200W. When the initial water temperature is low, the water close to the heating source is not easy to be vaporized. The two groups of heating coils work together to heat, and the heating power is 1800W. When the water is heated to a certain temperature, for example, 60℃, only the third heating coil 11d with a power of 1200W works, reducing the possibility of vaporization of the water close to the heating source. When the water is heated to a certain temperature again, for example, 90℃, only the second heating coil 11c with a power of 600W works, reducing the possibility of vaporization of the water close to the heating source again.

[0062] In an embodiment, the first heating body 11 and the second heating body 12 are centrally symmetric with the center point of the planar rectangular coordinate system as the center, and the center point of the planar rectangular coordinate system is the center point of the base 100. The first heating body 11 and the second heating body 12 are centrally symmetric with the center point of the planar rectangular coordinate system as the center. In this way, the heating device generates heat more uniformly.

[0063] Referring to Figure 6 In an embodiment, the heating bodies 11, 12, 13, and 14 described above can further include a plurality of heating elements 171. The heating elements 171 can be implemented by heating resistors, or by printing materials with conductive heating properties on the base 10 in a printing manner. Referring to Figure 4 Each heating element 171 can be connected in parallel, that is, each heating element 171 is connected in parallel through wires 172 and 173 and connected to the electrode 17b. Specifically,

[0064] Connecting each heating element 171 in parallel is equivalent to increasing the cross-sectional area of the heating element 171. As can be seen from the above relationship 1-1 of Joule's law and the relationship 1-2 between resistance and heat, the resistance and the cross-sectional area are inversely proportional, and the resistance and the heat are inversely proportional. Therefore, under the same voltage,

[0065] In an embodiment, the heating bodies 11, 12, 13, and 14 described above can further include a plurality of heating elements 171. The heating elements 171 can be implemented by heating resistors, or by printing materials with conductive heating properties on the bottom substrate of the base 100 in a printing manner. Referring to Figure 6 Each heating element 171 can be connected in parallel, that is, each heating element 171 is connected in parallel through wires 172 and 173 and connected to the electrode 17b. Specifically,

[0066] The heat generating elements 171 are connected in parallel, which is equivalent to increasing the cross-sectional area of the heat generating elements 171. As can be seen from the above relationship 1-1 and the relationship 1-2 between resistance and heat, the resistance is inversely proportional to the cross-sectional area, and the heat is inversely proportional to the resistance. Therefore, by connecting the heat generating elements 171 in parallel, the heat generated by the heat generating body can be increased under the same voltage.

[0067] In an embodiment, as shown in Figure 7 the base 100 includes a circuit board, and the circuit board is provided with a control unit 30, a first switch unit 31, a second switch unit 32, a third switch unit 33, and a fourth switch unit 34.

[0068] The control unit 30;

[0069] The first end of the first switch unit 31 is connected to the control unit 30, the second end is connected to the first electrode 11a, and the third end is connected to the power supply, for controlling the first heat generating body 11 to generate heat according to the first control signal output by the control unit 30.

[0070] The first end of the second switch unit 32 is connected to the control unit 30, the second end is connected to the second electrode 12a, and the third end is connected to the power supply, for controlling the second heat generating body 12 to generate heat according to the second control signal output by the control unit 30.

[0071] The first end of the third switch unit 33 is connected to the control unit 30, the second end is connected to the third electrode 13a, and the third end is connected to the power supply, for controlling the third heat generating body 13 to generate heat according to the third control signal output by the control unit 30.

[0072] The first end of the fourth switch unit 34 is connected to the control unit 30, the second end is connected to the fourth electrode 14a, and the third end is connected to the power supply, for controlling the fourth heat generating body 14 to generate heat according to the fourth control signal output by the control unit 30.

[0073] Each of the above-mentioned switch units has at least two working states: switch closed state and switch open state. In the switch closed state, the conductive loop between the heat generating body and the power supply is closed; in the switch open state, the conductive loop between the heat generating body and the power supply is open. The working state of the switch unit is controlled by the control unit 30: the control unit 30 outputs a control signal, and the working state of the switch unit is in the switch closed state; the control unit 30 does not output a control signal, and the working state of the switch unit is in the switch open state; each switch unit can be realized by a relay or an electronic device with switch control function, such as IGBT (Insulated Gate Bipolar Transistor).

[0074] The control unit 30 can be implemented by a control chip. By connecting each switch unit to the control chip and outputting corresponding control signals through the control unit 30, the control unit 30 can control one or more specified heating bodies to generate heat. The control unit 30 outputs which control signal can be based on the operator's operation of the switch button. For example, when the first heating body 11 and the third heating body 13 are required to generate heat, the operator can press the corresponding switch button, so that the control unit 30 outputs the first control signal and the third control signal, thereby triggering the first switch unit 31 and the third switch unit 33 to enter the closed state, so that the conduction loop between the power supply and the first heating body 11 and the third heating body 13 is turned on, and the first heating body 11 and the third heating body 13 generate heat.

[0075] In a specific implementation scenario, the switch unit can be implemented by a relay, that is, each switch unit includes a relay, and the control end of each relay is connected to the control unit 30, the first contact of each relay is connected to each heating body, and the second contact of each relay is connected to the power supply. Referring to Figure 8 For example, when the control unit 30 outputs the control signal, the first contact 311a and the second contact 311b of the relay 311 are closed, the conduction loop between the heating body 11 and the power supply is closed, and the heating body 11 generates heat.

[0076] In addition, the base is also provided with four switch operating members, which are respectively connected with the electrodes on the heating bodies, for controlling the corresponding heating bodies to generate heat. Each switch operating member 15 is connected to the control unit and can control a single heating body to generate heat.

[0077] In an embodiment, referring to Figure 9 and Figure 10 The heating device further includes a first kettle body 201, which is internally provided with a first partition plate 21 and a second partition plate 22, and the first partition plate 21 and the second partition plate 22 divide the space in the first kettle body 201 into four space regions, and the four space regions correspond to the first region, the second region, the third region and the fourth region of the base 100 respectively.

[0078] The first kettle body 201 includes a first kettle wall, a first kettle bottom and a first outer shell.

[0079] The first kettle wall forms the shape of the kettle body, for example, a cylindrical shape with equal diameters from top to bottom, or a column shape with a larger diameter at the bottom. The first kettle bottom is fixed to the bottom of the first kettle wall, and the two are assembled to form the liquid storage cavity of the kettle body. The first kettle body 201 can be used to hold substances to be heated, such as water, milk, etc. When using the heating device to heat the substances, the first kettle body 201 can be placed on the base 100, so that the heat generated by each heating body can be conducted to the first kettle body 201, thereby heating the substances in the first kettle body 201. The first outer shell is covered outside the first kettle wall and the first kettle bottom, which can be a plastic shell, and is provided with a handle for the user to hold.

[0080] The first partition 21 and the second partition 22 can be perpendicular to each other. By providing the first partition 21 and the second partition 22 in the first kettle body 201, the liquid storage cavity of the first kettle body 201 can be divided into four regions, which also correspond to each quadrant of the planar rectangular coordinate system.

[0081] The first kettle body 201 is provided with four openings, which are arranged at the upper part of the four regions of the liquid storage cavity; the fluid medium to be heated (such as water, soy milk or milk, etc.) is poured into the liquid storage cavity from the openings. The first kettle wall and the first kettle bottom can be an integral structure, and after assembly, they can be considered as a stainless steel liner of the heating device. The inner wall of the stainless steel liner can be coated with an anti-fouling coating, such as a ceramic anti-fouling coating or a Teflon anti-fouling coating, to prevent particles generated during the heating of the fluid medium from depositing on the inner wall of the stainless steel liner to form fouling.

[0082] In an embodiment, the base 100 is provided with at least one first fixing member; the first kettle body 201 is provided with at least one second fixing member, and the first fixing member cooperates with the second fixing member to fix the first kettle body 201 on the base 100.

[0083] When using the heating device to heat, the first kettle body 201 can be placed on the base 100, and the first fixing member on the base 100 cooperates with the second fixing member. Specifically, the first fixing member can be a groove on the base 100, and the second fixing member can be a protrusion matching the groove. Through the concave-convex cooperation between the protrusion and the groove, the first kettle body 201 can be fixed on the base 100.

[0084] In addition, the first fixing member is arranged at the center of the base 100, which can be the center point of the planar rectangular coordinate system, and the second fixing member can be arranged at the bottom of the first kettle body 201, which can be the perpendicular center of the first partition 21 and the second partition 22. In this way, the first kettle body 201 can be fixed on the base 100, and each heating body can uniformly heat the substances in the first kettle body 201.

[0085] In an embodiment, as shown in Figure 11As shown, the heating device can further include four second kettle bodies 202, each of which includes a second kettle wall and a second kettle bottom.

[0086] The second kettle wall is shaped like a quarter of a cylinder, and the four second kettle bodies 202 can be combined to form a cylindrical kettle body. The second kettle bottom is fixed to the bottom of the second kettle wall, and the two are assembled to form a liquid storage cavity of the kettle body. The second kettle body 202 can be used to hold substances to be heated, such as water, milk, etc. When the heating device is used to heat the substances, the second kettle body 202 can be placed on the base 100, so that the heat generated by each heating element can be conducted to the second kettle body 202, thereby heating the substances in the second kettle body 202.

[0087] This embodiment can facilitate the heating of the substances in the second kettle body 202 by the heating elements on the base 100 by providing four second kettle bodies 202 on the heating device.

[0088] In addition, each second kettle body 202 can be provided with a fourth fixing member, and the base 100 can be provided with a third fixing member. The fourth fixing member and the third fixing member can be matched to fix each second kettle body 202 on the base 100.

[0089] To facilitate hand holding and avoid burns, each second kettle body 202 can be provided with a handle. The handle can be provided on the second kettle wall of the second kettle body 202. Specifically, for a second kettle body 202 shaped like a quarter of a cylinder, the handle can be provided on the curved surface of the second kettle wall and opposite the right-angled surface of the second kettle wall, so that the user can hold the handle to flow the substances in the second kettle body 202 out of the right-angled surface of the second kettle wall.

[0090] The heating device described in the above embodiments can be used to heat water, coffee, milk, soy milk, etc. at the same time. When in use, only the first kettle body 201 or the second kettle body 202 needs to be placed on the base 100, and any heating element on the base 100 can be controlled to generate heat.

[0091] The heating device described in the above embodiments can be used to heat multiple substances at the same time. For substances with different melting points, such as water, coffee, milk, soy milk, etc., only the first kettle body 201 or the second kettle body 202 needs to be placed on the base 100, and any heating element on the base 100 can be controlled to generate heat, so that the heating power of different heating elements can be controlled according to the melting points of the substances. The heating power of the heating device of the embodiments of the present application is controllable to a large extent.

[0092] The above are only some embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the specification and the drawings is also included in the patent protection scope of the present application.

[0093] Without further limitation, an element defined by the phrase "including a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus including the element. Also, unless otherwise indicated, identical lettering, reference numerals and / or symbols in the various drawings and the specification signify the same or similar elements or steps.

[0094] In addition, while the terms "first," "second," "third," etc. can be used herein to describe various information, these terms are not intended to denote a particular order or hierarchy. These terms are merely used to distinguish one category of information from another. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "or" and "and / or" as used herein are to be interpreted as inclusive or meaning either or any combination. Only terms clearly intended to mean "one and only one" will exclude the other combination.

Claims

1. A heating device, characterized in that, include: The base has a first region, a second region, a third region and a fourth region, each region corresponding to a quadrant of a Cartesian coordinate system; A first heating element is disposed in the first region, and a first electrode is disposed thereon, and the heating element is controlled to heat up through the first electrode. A second heating element is disposed in the second region, and a second electrode is disposed thereon. The heating element is controlled to heat up through the second electrode. A third heating element is disposed in the third region, and a third electrode is disposed thereon, and the heating element is controlled to generate heat through the third electrode. A fourth heating element is disposed in the fourth region, and a fourth electrode is disposed thereon, and the heating element is controlled to generate heat through the fourth electrode. The base is also equipped with four switch operating components, which are respectively connected to the electrodes on the heating element to control the heating of the corresponding heating element. Each of the first, second, third, and fourth heating elements includes a first heating coil, a second heating coil, and a third heating coil. The cross-sectional area of ​​the first heating coil is inversely proportional to the distance from the center point of the first heating coil to the first center. The first center is the position on the base corresponding to the center point of the Cartesian coordinate system. The second and third heating coils are both arranged around the second center on the base. The second center is the center point of each region. The cross-sectional area of ​​the second heating coil is smaller than that of the third heating coil. In the initial stage of heating when the liquid temperature is low, the second and third heating coils work simultaneously. When the liquid is heated to a certain temperature, only the third heating coil works. When the liquid is heated to a higher certain temperature, only the second heating coil works. The second and third heating coils are arranged around the second center.

2. The heating device according to claim 1, characterized in that, The base includes a circuit board, and the circuit board is provided with: The control unit is connected to the switch operating element on the base; The first switching unit has a first end connected to the control unit, a second end connected to the first electrode, and a third end connected to the power supply, and is used to control the first heating element to heat up according to the first control signal output by the control unit. The second switching unit has a first end connected to the control unit, a second end connected to the second electrode, and a third end connected to the power supply. It is used to control the heating of the second heating element according to the second control signal output by the control unit. The third switching unit has a first end connected to the control unit, a second end connected to the third electrode, and a third end connected to the power supply. It is used to control the heating of the third heating element according to the third control signal output by the control unit. The fourth switching unit has its first end connected to the control unit, its second end connected to the fourth electrode, and its third end connected to the power supply. It is used to control the fourth heating element to heat up according to the fourth control signal output by the control unit.

3. The heating device according to claim 2, characterized in that, Each switching unit includes a relay, and the control terminal of each relay is connected to the control unit. The first contact of each relay is connected to each heating element, and the second contact of each relay is connected to the power supply.

4. The heating device according to claim 1, characterized in that, The first heating element and the second heating element are symmetrical, and the center of symmetry is the position on the base corresponding to the center point of the plane rectangular coordinate system.

Images