Liquid heater

Abstract

The invention relates to a liquid heater which comprises a base device and a kettle body device, and the kettle body device comprises a kettle main body, a kettle body bottom shell and a heating disc assembly. The kettle body device further comprises a liquid sensing element and a bounce switch assembly. The heating disc assembly comprises a heat insulation disc and a heating wire element, the heat insulation disc is provided with a concave heat radiation cavity, the heating wire element comprises a resistance section and a heating section, the heating section is distributed in the heat radiation cavity, and the resistance section is embedded in the heat insulation disc. The bounce switch assembly is electrically connected with the heating wire element, the sensing end of the liquid sensing element is located in the heat radiation cavity, the liquid sensing element is used for detecting parameters of liquid in the heat radiation cavity, and the bounce switch assembly cuts off a power source of the heating wire element according to electric signals of the liquid sensing element. The heating wire element is provided with the resistance section embedded into the heat insulation disc, and even if liquid enters the heat radiation cavity, the short circuit phenomenon cannot occur.

Description

Technical Field

[0001] The invention relates to the technical field of water boiling appliances, in particular to a liquid heater. Background Art

[0002] Safety regulations require that electric kettles have a structure that can disconnect power or prevent electric shock if the kettle body breaks. Existing electric kettles typically use a separate heating plate to heat the glass kettle body, creating a heat conduction heating system. For example, Publication No. CN117502903A discloses a split, all-glass liquid heating container.

[0003] However, the heating plate of the heat conduction liquid heating container generates heat first, and then transfers the heat to the kettle body through the heating plate. Among them, a part of the heat generated by the heating plate is difficult to transfer to the liquid to be heated, which causes a large waste of heat conduction energy. In addition, the heat transfer is also affected by the thermal conductivity of each material, resulting in a technical problem of low heating efficiency of the liquid heater, so it needs to be improved. Summary of the Invention

[0004] In order to overcome the problems existing in the related art, an embodiment of the present invention provides a liquid heater to solve the technical problems of large heat waste and low heating efficiency.

[0005] According to a first aspect of an embodiment of the present invention, there is provided a liquid heater, comprising a base device and a kettle body device, wherein the kettle body device comprises a kettle body, a kettle body bottom shell mounted on the kettle body, and a heating plate assembly, and the kettle body device further comprises a liquid sensing element and a bounce switch assembly; The heating plate assembly includes a heat-insulating plate and a heating wire element, wherein the heat-insulating plate is provided with a concave heat radiation cavity, and the heating wire element includes a connected resistance section and a heating section, wherein the heating section is distributed in the heat radiation cavity, and the resistance section is embedded in the heat-insulating plate; The bounce switch assembly is electrically connected to the heating wire element, the sensing end of the liquid sensing element is located in the heat radiation cavity, the liquid sensing element is used to detect the liquid parameters in the heat radiation cavity, and the bounce switch assembly disconnects the power supply of the heating wire element according to the electrical signal of the liquid sensing element.

[0006] In one embodiment, the liquid sensing element is located in a central area of ​​the heat radiation cavity, and the heating section surrounds the liquid sensing element.

[0007] In one embodiment, the liquid sensing element protrudes toward the kettle body, wherein the protruding height of the liquid sensing element exceeds the protruding height of the heating section.

[0008] In one embodiment, the heat-insulating disk includes a positive electrode channel and a negative electrode channel connected to the heat radiation cavity, and the resistance section extends into the positive electrode channel and / or the negative electrode channel.

[0009] In one embodiment, the heating plate assembly further includes a clamp and an elastic member, wherein the elastic member is sleeved on the kettle body, and the clamp is connected to the elastic member and supports the heat insulating plate to press against the bottom of the kettle body.

[0010] In one embodiment, the kettle body device includes an elastic pre-tightening mechanism installed on the bottom shell of the kettle body, and the elastic pre-tightening mechanism elastically pushes the heat insulation plate to press against the bottom of the kettle body.

[0011] In one embodiment, the kettle body device further comprises a temperature sensor installed on the heating plate assembly, and the temperature sensor and the liquid sensing element are arranged in parallel and spaced apart.

[0012] In one embodiment, the kettle body is an integrated glass kettle body.

[0013] In one embodiment, a concave snap-in groove is provided at the bottom of the kettle body, and the heating plate assembly is snap-connected to the snap-in groove.

[0014] In one embodiment, the base device includes a fan assembly, a lower base and an upper base fixedly connected, wherein an electrical cavity and a heat dissipation cavity are formed between the lower base and the upper base, and the fan assembly is installed in the heat dissipation cavity; the upper base is provided with a guide hole connected to the electrical cavity, and the guide hole is staggered with the heat dissipation cavity; The bottom shell of the kettle body is provided with a plurality of heat dissipation holes. The kettle body device is assembled to the base device, and at least some of the heat dissipation holes are connected to the guide holes.

[0015] The technical solution provided by the embodiments of the present invention can provide the following beneficial effects: a liquid sensing element is disposed within the heating plate assembly and below the kettle body. When the bottom of the kettle body ruptures and contacts liquid, the liquid sensing element outputs an electrical signal, and the bounce switch assembly controls power outage to prevent the risk of electric shock. The heating wire element has a resistive section embedded within the insulating plate, preventing a short circuit even if liquid enters the heat radiation chamber, greatly improving the safety of the appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 FIG1 is a schematic structural diagram of a liquid heater according to an embodiment.

[0018] Figure 2 FIG1 is a partial cross-sectional schematic diagram showing a liquid heater according to an embodiment.

[0019] Figure 3 FIG1 is a schematic structural diagram showing a heating plate assembly according to an embodiment.

[0020] Figure 4 The figure shows a cross-sectional structural diagram of a heating plate assembly according to an embodiment.

[0021] Figure 5 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0022] Figure 6 FIG1 is a schematic structural diagram showing a base device according to an embodiment.

[0023] In the figure, there are a kettle body device 10; a kettle body 11; a snap-fit ​​groove 111; a heating plate assembly 12; a heat insulating plate 121; a heat radiation cavity 1211; a heating wire element 122; a heating section 1221; a resistance section 1222; a liquid sensing element 123; a clamp 124; an elastic member 1241; a snap-fit ​​ring 1242; an elastic pre-tightening mechanism 13; a pre-stressed spring 131; a kettle body bottom shell 14; a plug structure 141; a bounce switch assembly 142; a handle 15; a kettle lid 16; a base device 20; an upper base 21; a guide hole 211; a mounting groove 212; and a lower base 22. DETAILED DESCRIPTION

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] like Figures 1 to 5 As shown, the present invention provides a liquid heater, which includes a base device 20 and a kettle body device 10. The base device 20 is connected to a power source via a plug. The kettle body device 10 and the base device 20 are used in combination. The base device 20 is provided with a mounting groove 212, and the mounting groove 212 has a plug structure 141. The kettle body device 10 is placed in the mounting groove 212 and quickly connected to the plug structure 141. The base device 20 can plug and power the kettle body device 10.

[0026] The kettle assembly 10 includes a kettle body 11, a bottom shell 14 mounted on the body 11, and a heating plate assembly 12. The bottom shell 14 mounts the heating plate assembly 12 to the bottom of the body 11. Optionally, the body 11 is integrally formed of glass or metal. Optionally, a lid 16 is mounted on the mouth of the body 11. Optionally, a handle 15 is mounted on one side of the body 11.

[0027] The kettle body 10 also includes a liquid sensing element 123 and a bounce switch assembly 142. The liquid sensing element 123 is used to detect liquid or water vapor in the corresponding space and output an electrical signal. The bounce switch assembly 142 is used to control the current between the heating plate assembly 12 and the base assembly 20, thereby achieving automatic power off.

[0028] The bounce switch assembly 142 is used in the existing liquid heater, and the bounce switch assembly 142 is used to cut off the power after the liquid heating of the kettle body device 10 reaches a specified stability.

[0029] In this embodiment, the heating plate assembly 12 includes an insulating plate 121 and a heating wire element 122. The insulating plate 121 is made of insulating material to reduce the heat transfer from the insulating plate 121, thereby concentrating the heat toward the bottom of the kettle body 11, greatly improving the heating efficiency.

[0030] The heat-insulating plate 121 is provided with a concave heat-radiating cavity 1211, the depth of which is greater than the height of the heating element 122. The heating element 122 comprises a connected resistor segment 1222 and a heating segment 1221. The heating segment 1221 is located within the heat-radiating cavity 1211, while the resistor segment 1222 is embedded in the heat-insulating plate 121. When powered, the heating segment 1221 emits heat radiation, directly heating the kettle body 11 without the need for contact heat conduction, significantly improving heating efficiency and minimizing heat loss.

[0031] The heating section 1221 is located in the heat radiation cavity 1211, and the resistance section 1222 is embedded in the heat insulation disk 121. Even when the bottom of the kettle body 11 is broken, liquid rushes into the heat radiation cavity 1211. Even if the heating section 1221 is directly conductive through the liquid, the resistance section 1222 is located in the heat insulation disk 121, and no short circuit accident will occur, which has high safety.

[0032] The pop-up switch assembly 142 is electrically connected to the heating wire element 122. The sensing end of the liquid sensing element 123 is located in the heat radiation cavity 1211. The liquid sensing element 123 is used to detect the liquid parameters in the heat radiation cavity 1211. The pop-up switch assembly 142 disconnects the power supply of the heating wire element 122 according to the electrical signal of the liquid sensing element 123.

[0033] The liquid sensing element 123 is arranged on the heating plate assembly 12 and is located below the kettle body 11. Even when the bottom of the kettle body 11 is broken and the liquid rushes into the heat radiation cavity 1211, the liquid sensing element 123 outputs an electrical signal when the bottom of the kettle body 11 is broken and contacts the liquid, and the bounce switch assembly 142 controls the power off to avoid the risk of electric shock.

[0034] Further preferably, the kettle body device 10 further includes a temperature sensor mounted on the heating plate assembly 12. The temperature sensor and the liquid sensing element 123 are arranged in parallel and spaced apart. The temperature sensor can detect the temperature inside the heat-insulating plate 121. The temperature sensor is linked to the bounce switch assembly 142. When the liquid sensing element 123 breaks at the bottom of the kettle body 11 and contacts the heating plate assembly 12, the temperature inside the heat-insulating plate 121 drops significantly, and the bounce switch assembly 142 is controlled to be de-energized, thereby forming a linkage.

[0035] like Figures 2 to 5 As shown, further preferably, the liquid sensing element 123 is located in the central area of ​​the heat radiation cavity 1211, and the heating section 1221 surrounds the liquid sensing element 123. Liquid sensing element 123 utilizes a liquid sensor, and is centrally located within the heat radiation cavity 1211, with the heating section 1221 surrounding the liquid sensing element 123. This expands the heating range and facilitates the layout and assembly of the heating section 1221. Furthermore, the risk of cracking the bottom of the kettle body 11 is high, and centrally locating the liquid sensing element 123 also improves the response speed of the liquid sensing element 123 when sensing liquid.

[0036] Furthermore, the liquid sensing element 123 protrudes toward the kettle body 11, wherein the protrusion height of the liquid sensing element 123 exceeds the protrusion height of the heating section 1221. The large protrusion height of the liquid sensing element 123 allows it to contact the liquid in advance, which can further reduce the risk.

[0037] In a preferred embodiment, the heat shield 121 includes a positive channel and a negative channel connected to the heat radiation cavity 1211, and the resistor segment 1222 extends into the positive channel and / or the negative channel. The ends of the heating wire element 122 are used to connect to the positive and negative poles of the power supply, and the resistor segment 1222 and the heating segment 1221 are distributed between the positive and negative poles of the power supply.

[0038] When the resistance segment 1222 is set as one end of the heating segment 1221, it can be embedded in the positive channel or the negative channel at will; when the resistance segment 1222 is set at both ends of the heating segment 1221, the resistance segment 1222 can be embedded in the positive channel and the negative channel at the same time.

[0039] The heating plate assembly 12 and the kettle body 11 are detachably connected, wherein the heating plate assembly 12 also includes a clamp 124 and an elastic member 1241. The elastic member 1241 is sleeved on the kettle body 11. The clamp 124 is clamped to connect the elastic member 1241 and supports the insulation plate 121 to press against the bottom of the kettle body 11.

[0040] The elastic member 1241 is sleeved on the kettle body 11 to separate the kettle body 11 and the clamp member 124, which can not only prevent the clamp member 124 from being directly rigidly connected to the kettle body 11, but also achieve heat energy blocking to prevent leakage.

[0041] Preferably, the kettle body 11 is an integrated glass kettle body, and a concave snap-fitting groove 111 is provided at the bottom of the kettle body 11 , and the heating plate assembly 12 is snap-fitted and connected to the snap-fitting groove 111 .

[0042] The elastic member 1241 is sleeved around the clamping groove 111, and the clamping member 124 forms a matching structure that is snap-connected to the clamping groove 111, thereby improving the connection firmness and accuracy.

[0043] The bottom of the clamp 124 forms a tray structure, and the heat insulating plate 121 abuts against the bottom of the kettle body 11 through the bottom of the clamp 124, so that the opening of the heat insulating plate 121 abuts against the kettle body 11, forming a snap connection. Optionally, the clamp 124 includes two hingedly connected snap rings 1242, the free ends of which are closed and snapped together to lock the elastic member 1241.

[0044] Furthermore, preferably, the kettle body device 10 includes an elastic pre-tightening mechanism 13 mounted on the kettle body bottom shell 14. The elastic pre-tightening mechanism 13 elastically pushes the heat-insulating plate 121 against the bottom of the kettle body 11. The elastic pre-tightening mechanism 13 abuts and defines the kettle body bottom shell 14 and the heat-insulating plate 121, thereby maintaining the heat-insulating plate 121 in close contact with the bottom of the kettle body 11, reducing the assembly precision requirements of the heat-insulating plate 121 and the clamp 124.

[0045] Preferably, the elastic preload mechanism 13 is one or more preload springs 131 to form abutment support. Optionally, the elastic preload mechanism 13 is a preload pad to abut against the bottom of the heat insulation plate 121.

[0046] like Figure 2 and Figure 6 As shown, the bottom shell 14 of the kettle body houses the heating plate assembly 12, with a bottom space between the bottom shell 14 and the heating plate assembly 12. The bottom shell 14 is provided with a plurality of heat dissipation holes, which communicate with the bottom space to form a heat dissipation channel. Preferably, the plurality of heat dissipation holes are evenly distributed around the bottom shell 14, thereby forming a uniformly distributed structure at any angle.

[0047] The base assembly 20 includes a fan assembly, a fixedly connected lower base 22, and an upper base 21. The lower base 22 and upper base 21 form a connected electrical and heat dissipation chamber, and the fan assembly is mounted within the heat dissipation chamber. A partition is provided within the lower base 22 and upper base 21, forming a connected electrical and heat dissipation chamber between the lower base 22 and upper base 21. The fan assembly is mounted within the heat dissipation chamber. The heat dissipation chamber is the space formed by the annular tube body, and the fan assembly promotes flow within the interior to prevent heat concentration.

[0048] The upper base 21 is provided with a guide hole 211 communicating with the electrical cavity. The guide hole 211 is staggered with the heat dissipation cavity so that the heat dissipation cavity can guide the gas to flow along the guide hole 211 to the heat dissipation cavity, and then discharge the heat out of the base device 20.

[0049] The bottom shell 14 of the kettle body is provided with a plurality of heat dissipation holes. The kettle body device 10 is assembled to the base device 20 , and at least some of the heat dissipation holes are connected to the guide holes 211 .

[0050] When the liquid heater is in use, the kettle body device 10 is assembled to the base device 20, and at least some of the heat dissipation holes are connected to the guide holes 211, so that the bottom space of the kettle and the electrical cavity are connected, and then the airflow and part of the heat in the kettle body device 10 can be discharged along the heat dissipation cavity, thereby keeping the operating temperature of the kettle body device 10 stable.

[0051] In one embodiment, the kettle body device 10 further includes a water level monitoring component disposed at the bottom of the kettle body 11 . The kettle body 11 is made of glass material. The water level monitoring component uses induction to detect the water level in the kettle body 11 .

[0052] The water level monitoring assembly is equipped with an anti-dry-burn element, which is electrically connected to the heating plate assembly 12. The anti-dry-burn element outputs an electrical signal when the water level in the kettle body 11 reaches zero. The heating plate assembly 12 stops heating after receiving the electrical signal output by the anti-dry-burn element, thereby preventing dry-burn damage to the kettle body 10.

[0053] Furthermore, the kettle body device 10 is provided with a temperature detection component, which is away from the heating plate component 12. The temperature detection component can detect the temperature of the liquid in the kettle body 11 without contact, thereby avoiding damage to the kettle body 11. Preferably, the temperature detection component is provided with a non-contact temperature sensor for accurate temperature measurement.

[0054] It should be understood that the present application is not limited to the precise structure described above and shown in the accompanying drawings, and that various modifications and variations may be made without departing from the scope thereof. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

Claims

1. A liquid heater comprising a base device and a kettle body device, wherein the kettle body device comprises a kettle body, a kettle body bottom shell mounted on the kettle body, and a heating plate assembly, characterized in that: The kettle body device also includes a liquid sensing element and a bounce switch assembly; The heating plate assembly includes a heat-insulating plate and a heating wire element, wherein the heat-insulating plate is provided with a concave heat radiation cavity, and the heating wire element includes a connected resistance section and a heating section, wherein the heating section is distributed in the heat radiation cavity, and the resistance section is embedded in the heat-insulating plate; The bounce switch assembly is electrically connected to the heating wire element, the sensing end of the liquid sensing element is located in the heat radiation cavity, the liquid sensing element is used to detect the liquid parameters in the heat radiation cavity, and the bounce switch assembly disconnects the power supply of the heating wire element according to the electrical signal of the liquid sensing element.

2. The liquid heater according to claim 1, characterized in that The liquid sensing element is located in the central area of ​​the heat radiation cavity, and the heating section surrounds the liquid sensing element.

3. The liquid heater according to claim 2, characterized in that The liquid sensing element protrudes toward the kettle body, wherein the protruding height of the liquid sensing element exceeds the protruding height of the heating section.

4. The liquid heater according to claim 1, wherein The heat-insulating disk includes a positive electrode channel and a negative electrode channel connected to the heat radiation cavity, and the resistance section extends into the positive electrode channel and / or the negative electrode channel.

5. The liquid heater according to claim 1, wherein The heating plate assembly further comprises a clamping member and an elastic member, wherein the elastic member is sleeved on the kettle body, and the clamping member is connected to the elastic member by a clamp and holds the heat insulating plate tightly against the bottom of the kettle body.

6. The liquid heater according to claim 1, wherein The kettle body device includes an elastic pre-tightening mechanism installed on the bottom shell of the kettle body, and the elastic pre-tightening mechanism elastically pushes the heat insulation plate to press against the bottom of the kettle body.

7. The liquid heater according to claim 1, wherein The kettle body device further comprises a temperature sensor installed on the heating plate assembly, and the temperature sensor and the liquid sensing element are arranged in parallel and at intervals.

8. The liquid heater according to claim 1, wherein The pot body is an integrated glass pot body.

9. The liquid heater according to claim 8, characterized in that The bottom of the kettle body is provided with a concave snap-in groove, and the heating plate assembly is snap-connected to the snap-in groove.

10. The liquid heater according to claim 1, wherein The base device includes a fan assembly, a lower base and an upper base that are fixedly connected, wherein an electrical cavity and a heat dissipation cavity are formed between the lower base and the upper base, and the fan assembly is installed in the heat dissipation cavity; the upper base is provided with a guide hole that is connected to the electrical cavity, and the guide hole is staggered with the heat dissipation cavity; The bottom shell of the kettle body is provided with a plurality of heat dissipation holes. The kettle body device is assembled to the base device, and at least some of the heat dissipation holes are connected to the guide holes.

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