Heating device and cooking equipment

Abstract

The invention relates to a heating device and cooking equipment, the heating device is used for an inner container of the cooking equipment, the heating device comprises an electric field assembly and a first heating piece, the electric field assembly is provided with a cavity, and the electric field assembly comprises two electric field plates oppositely arranged on the two sides of the cavity; the two electric field plates are used for being electrically connected with a positive electrode and a negative electrode of a power supply respectively to form an electric field, and the electric field assembly further comprises heat conduction liquid and conductive nano-particles which are filled in the cavity; the first heating piece is arranged in the cavity. An electric field can be formed between the two electric field plates and acts on the conductive nanoparticles, so that the conductive nanoparticles can form an ordered chain-shaped or columnar structure in the cavity along the direction of the electric field, and a heat conduction path in the heat conduction liquid can be enhanced through the conductive nanoparticles with the chain-shaped or columnar structure; and the uniformity of conducting heat generated by the heating piece to the two electric field plates is improved, so that the uniformity of temperature distribution around the heating device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking utensils, in particular to a heating device and cooking equipment. Background Art

[0002] In cooking devices such as steam ovens, an upper heating tube is usually arranged on the top surface of the inner pot, and a lower heating tube is arranged on the bottom of the inner pot, so as to realize the baking function of the cooking device.

[0003] However, since the heating tube is generally fired according to a geometric shape and the temperature distribution is uneven, it may cause uneven distribution of the temperature field inside the inner pot, thereby causing uneven heating of the food in the inner pot and affecting the cooking effect. Summary of the invention

[0004] Based on this, it is necessary to provide a heating device and a cooking device to address the above problems so as to improve the uniformity of temperature distribution.

[0005] The present invention first provides a heating device, comprising: an electric field component, which is provided with a cavity, wherein the electric field component comprises two electric field plates arranged relatively on both sides of the cavity, the two electric field plates are respectively used to electrically connect to the positive and negative electrodes of a power source to form an electric field, the electric field component also comprises a heat-conducting liquid and conductive nanoparticles filled in the cavity; and a first heating element, which is arranged in the cavity.

[0006] In the above-mentioned heating device, the heat generated by the first heating element can be evenly conducted to the two electric field plates through the heat-conducting liquid, and diffused outward to the surrounding of the heating device through the two electric field plates to cook the food in the inner pot; after the power supply applies voltage to the two electric field plates, an electric field is formed between the two electric field plates, and the electric field acts on the conductive nanoparticles, so that the conductive nanoparticles can form an ordered chain or columnar structure in the cavity along the direction of the electric field, so that the heat conduction path in the heat-conducting liquid can be enhanced through the conductive nanoparticles with chain or columnar structures, thereby improving the uniformity of conducting the heat generated by the first heating element to the two electric field plates, thereby improving the uniformity of the temperature distribution around the heating device, and improving the cooking effect of the heating device on the food in the inner pot.

[0007] In one of the embodiments, the first heating element comprises a heating tube, the heating tube is laid on a preset plane, and the two electric field plates are parallel to the preset plane.

[0008] With this arrangement, the heat generated at different positions on the heating tube can be evenly conducted to different positions on the two electric field plates through the heat-conducting liquid and the conductive nanoparticles, and the two parallel arranged electric field plates can also improve the orderliness and uniformity of the arrangement of the conductive nanoparticles in the cavity.

[0009] In one of the embodiments, the electric field assembly further comprises an insulating plate disposed on the periphery of the first heating element, two ends of the insulating plate are respectively connected to the two electric field plates, and the insulating plate and the two electric field plates are arranged to form the cavity.

[0010] With such a configuration, the insulating plate can prevent the two electric field plates from being turned on, and can also prevent current loss and electric field disturbance, so that the electric field strength between the two electric field plates is more stable.

[0011] In one embodiment, the electric field formed by the two electric field plates is an alternating electric field.

[0012] With such a configuration, the alternating electric field can promote the dynamic arrangement of the conductive nanoparticles, enhance the convection of the heat-conducting liquid in the cavity, make the heat generated by the first heating element diffuse faster in the heat-conducting liquid, and make the temperature distribution of the heat-conducting liquid more uniform.

[0013] In one embodiment, the electric field component is also provided with a first liquid inlet and a first liquid outlet connected to the cavity, and the heating device also includes a connecting component arranged outside the electric field component; the connecting component includes a pipeline and a liquid driving component arranged on the pipeline, and the two ends of the pipeline are respectively connected to the first liquid inlet and the first liquid outlet.

[0014] Such an arrangement can increase the flow rate of the heat-conducting liquid in the cavity and improve the heat conduction efficiency of the heat-conducting liquid.

[0015] In one embodiment, the connecting component further includes a liquid storage component and a second heating component, the liquid storage component is disposed on the pipeline, the liquid storage component is provided with a liquid storage cavity, and the second heating component is disposed in the liquid storage cavity.

[0016] With such an arrangement, the second heating element in the liquid storage chamber can perform secondary heating on the heat-conducting liquid to increase the temperature of the heat-conducting liquid.

[0017] In one of the embodiments, the heat-conducting liquid flows in the liquid storage chamber along a preset direction, and the second heating element is spiral-shaped and extends along the preset direction.

[0018] Such a configuration can increase the contact area between the heat-conducting liquid and the second heating element, thereby increasing the heat exchange area between the heat-conducting liquid and the second heating element, and improving the heat exchange effect between the heat-conducting liquid and the second heating element.

[0019] In one of the embodiments, the heat-conducting liquid flows in the liquid storage chamber along a preset direction, and the connecting component further includes a spoiler disposed in the liquid storage chamber, wherein the spoiler is spiral and extends along a preset direction.

[0020] With such a configuration, the spoiler can convert the heat-conducting liquid in the liquid storage chamber from a laminar state to a turbulent state, reduce the boundary layer thickness of the heat-conducting liquid, and improve the heat transfer coefficient of the heat-conducting liquid; the spoiler is spirally shaped and extends along a preset direction, which can increase the contact area between the heat-conducting liquid and the spoiler, and enhance the spoiler effect on the heat-conducting liquid.

[0021] The present invention also provides a cooking device, comprising an inner pot and the heating device as described above.

[0022] With such an arrangement, the heating device makes the temperature in the inner pot evenly distributed, so that the food in the inner pot is heated evenly, thereby improving the cooking effect of the food.

[0023] In one embodiment, the heating device is disposed on the top of the inner container.

[0024] With such an arrangement, the food in the inner pot can be baked through the electric field plate facing the bottom of the inner pot, so that the surface of the food is evenly colored, thereby improving the cooking effect of the food. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a cooking device according to an embodiment of the present invention;

[0027] Figure 2 The present invention provides Figure 1 A schematic diagram of a three-dimensional structure of a cooking device from another perspective;

[0028] Figure 3 The present invention provides Figure 2 A schematic diagram of a partial three-dimensional structure of a cooking device;

[0029] Figure 4 The present invention provides Figure 1 A cross-sectional structural schematic diagram of a cooking device;

[0030] Figure 5 The present invention provides Figure 4 A schematic cross-sectional view of the intermediate electric field assembly and the first heating element;

[0031] Figure 6 The present invention provides Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0032] Figure numerals: 1. electric field component; 11. cavity; 12. electric field plate; 13. heat-conducting liquid; 14. conductive nanoparticles; 15. insulating plate; 16. first liquid inlet; 17. first liquid outlet; 2. first heating element; 21. heating tube; 22. terminal; 3. connecting component; 31. pipeline; 311. first section; 312. second section; 313. third section; 32. liquid driving element; 321. third liquid inlet; 322. third liquid outlet; 33. liquid storage element; 331. liquid storage cavity; 332. second liquid inlet; 333. second liquid outlet; 34. second heating element; 35. spoiler; 4. liner. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0038] In cooking equipment such as steam ovens, an upper heating tube is usually arranged on the top surface of the inner pot, and a lower heating tube is arranged on the bottom of the inner pot to achieve the baking function of the cooking equipment. However, since the heating tube is generally fired according to a geometric shape, the temperature distribution is uneven, which may cause uneven temperature field distribution inside the inner pot, resulting in uneven heating of the food in the inner pot, affecting the cooking effect.

[0039] In order to solve the above problems, Figures 1 to 6 As shown, the present invention provides a heating device and a cooking apparatus to improve the uniformity of temperature distribution.

[0040] like Figures 4 to 5 As shown, specifically, the heating device is used for the inner pot 4 of the cooking equipment, and the heating device includes an electric field component 1 and a first heating element 2, wherein: the electric field component 1 is provided with a cavity 11, the electric field component 1 includes two electric field plates 12 arranged relatively on both sides of the cavity 11, the two electric field plates 12 are respectively used to electrically connect to the positive and negative electrodes of the power supply in the cooking equipment to form an electric field, the electric field component 1 also includes a heat-conducting liquid 13 and conductive nanoparticles 14 filled in the cavity 11; the first heating element 2 is arranged in the cavity 11.

[0041] In the heating device provided by the embodiment of the present invention, the heat generated by the first heating element 2 can be evenly conducted to the two electric field plates 12 through the heat-conducting liquid 13, and diffused outward to the periphery of the heating device through the two electric field plates 12 to cook the food in the inner pot 4; after the power supply applies voltage to the two electric field plates 12, an electric field is formed between the two electric field plates 12, and the electric field acts on the conductive nanoparticles 14, so that the conductive nanoparticles 14 can form an ordered chain or columnar structure along the direction of the electric field in the cavity 11, thereby enhancing the heat conduction path in the heat-conducting liquid 13 through the conductive nanoparticles 14 with chain or columnar structures, and improving the uniformity of conducting the heat generated by the first heating element 2 to the two electric field plates 12, thereby improving the uniformity of the temperature distribution around the heating device, and improving the cooking effect of the heating device on the food in the inner pot 4.

[0042] The conductive nanoparticles 14 may be made of alumina, titanium dioxide or other materials with surface functionalization treatment, so that the surface of the conductive nanoparticles carries electric charges. The heat-conducting liquid 13 may be high-temperature resistant silicone oil or the like.

[0043] like Figures 2 to 3 As shown, the electric field assembly 1 further includes an insulating plate 15 disposed on the periphery of the first heating element 2, and both ends of the insulating plate 15 are respectively connected to the two electric field plates 12, and the insulating plate 15 and the two electric field plates 12 are surrounded to form a cavity 11. The insulating plate 15 has a low conductivity, which can prevent the two electric field plates 12 from being turned on, and can also prevent current loss and electric field disturbance, so that the electric field strength between the two electric field plates 12 is more stable.

[0044] In one embodiment, the electric field formed by the two electric field plates 12 is an alternating electric field, that is, the power supply can apply an alternating voltage to the two electric field plates 12. The electric field direction and intensity of the alternating electric field will change periodically, thereby causing the conductive nanoparticles 14 to move in the cavity 11, promoting the dynamic arrangement of the conductive nanoparticles 14, and enhancing the convection of the heat-conducting liquid 13 in the cavity 11, so that the heat generated by the first heating element 2 diffuses faster in the heat-conducting liquid 13, and the temperature distribution of the heat-conducting liquid 13 is more uniform, thereby improving the heat conduction efficiency and heat conduction effect of the heat-conducting liquid 13. Of course, in other embodiments, the power supply can also apply a DC voltage to the two electric field plates 12, so that the electric field formed by the two electric field plates 12 is a constant electric field.

[0045] like Figure 3 and Figure 5 As shown, in one embodiment, the first heating element 2 includes a heating tube 21, and the heating tube 21 is laid on a preset plane a, and the two electric field plates 12 are parallel to the preset plane a. The two parallel electric field plates 12 can form a uniform electric field, thereby improving the orderliness and uniformity of the arrangement of the conductive nanoparticles 14 in the cavity 11, further enhancing the heat conduction path in the heat-conducting liquid 13, and improving the uniformity of the heat-conducting liquid 13 conducting the heat generated by the first heating element 2 to the two electric field plates 12. Furthermore, since both electric field plates 12 are parallel to the preset plane a, the direction of the electric field formed by the two electric field plates 12 is perpendicular to the preset plane a, the arrangement direction of the conductive nanoparticles 14 in the cavity 11 is perpendicular to the preset plane a, and the heating tube 21 is laid on the preset plane a, that is, the arrangement direction of the conductive nanoparticles 14 in the cavity 11 is perpendicular to the plane where the heating tube 21 is located, so that the heat generated at different positions on the heating tube 21 can be evenly conducted to different positions on the two electric field plates 12 through the heat-conducting liquid 13 and the conductive nanoparticles 14, further improving the uniformity of conducting the heat generated by the first heating element 2 to the two electric field plates 12. Among them, the heating tube 21 can be laid on the preset plane a in a spiral shape, or in other regular or irregular shapes such as a U shape or a W shape.

[0046] Of course, in other embodiments, the heating tube 21 may be laid on the preset plane a, the two electric field plates 12 may form an angle with the preset plane a, and the two electric field plates 12 may be parallel to each other or form an angle with each other. As long as an electric field can be formed between the two electric field plates 12, and the heat generated by the first heating element 2 can be evenly conducted to the two electric field plates 12 through the heat-conducting liquid 13 and the conductive nanoparticles 14, the embodiments of the present invention are not specifically limited here.

[0047] like Figure 1 As shown, the first heating element 2 further comprises a terminal 22 connected to the end of the heating tube 21 , and the terminal 22 can extend out of the electric field assembly 1 and is used for being electrically connected to a power source.

[0048] like Figure 1 and Figure 3 As shown, the electric field component 1 is also provided with a first liquid inlet 16 and a first liquid outlet 17 connected to the cavity 11, and the heating device also includes a connecting component 3 arranged outside the electric field component 1; the connecting component 3 includes a pipeline 31 and a liquid driving component 32 arranged on the pipeline 31, and the two ends of the pipeline 31 are respectively connected to the first liquid inlet 16 and the first liquid outlet 17. The liquid driving component 32 can drive the heat-conducting liquid 13 in the cavity 11 to flow out to the pipeline 31 through the first liquid outlet 17, and the heat-conducting liquid 13 in the pipeline 31 flows back to the cavity 11 through the first liquid inlet 16, so as to increase the flow rate of the heat-conducting liquid 13 in the cavity 11 and improve the heat conduction efficiency of the heat-conducting liquid 13. Among them, the liquid driving component 32 can be other components that can drive the heat-conducting liquid 13 to flow, such as a booster pump, a water pump, etc.

[0049] like Figure 4 and Figure 6 As shown, the connecting component 3 further includes a liquid storage member 33 and a second heating member 34. The liquid storage member 33 is disposed on the pipe 31. The liquid storage member 33 is provided with a liquid storage cavity 331. The second heating member 34 is disposed in the liquid storage cavity 331. The heat-conducting liquid 13 in the pipe 31 will flow through the liquid storage cavity 331. The second heating member 34 in the liquid storage cavity 331 can perform secondary heating on the heat-conducting liquid 13 to increase the temperature of the heat-conducting liquid 13, and prevent the temperature of the heat-conducting liquid 13 from decreasing after flowing out of the cavity 11, thereby affecting the heat conduction effect of the heat-conducting liquid 13 after flowing back into the cavity 11.

[0050] like Figure 1 and Figure 4As shown, in one embodiment, the liquid driving member 32 is arranged between the first liquid outlet 17 and the liquid storage member 33. Specifically, the liquid storage member 33 is also provided with a second liquid inlet 332 and a second liquid outlet 333 connected to the liquid storage chamber 331, and the liquid driving member 32 is provided with a third liquid inlet 321 and a third liquid outlet 322. The pipeline 31 includes a first section 311, a second section 312 and a third section 313. The two ends of the first section 311 are respectively connected to the first liquid outlet 17 and the third liquid inlet 321, the two ends of the second section 312 are respectively connected to the third liquid outlet 322 and the second liquid inlet 332, and the two ends of the third section 313 are respectively connected to the second liquid outlet 333 and the first liquid inlet 16. The liquid driving member 32 can drive the heat-conducting liquid 13 in the cavity 11 to flow out to the first section 311 through the first liquid outlet 17, and then flow back to the cavity 11 through the first liquid inlet 16 after passing through the liquid driving member 32, the second section 312, the liquid storage cavity 331 and the third section 313 in sequence. Of course, in other embodiments, the liquid driving member 32 can also be arranged between the liquid storage member 33 and the first liquid inlet 16.

[0051] like Figure 1 and Figure 6 As shown, the heat-conducting liquid 13 flows in the liquid storage cavity 331 along the preset direction b, and along the preset direction b, the second liquid inlet 332 and the second liquid outlet 333 are respectively connected to the two ends of the liquid storage cavity 331. In one embodiment, the liquid storage member 33 is cylindrical, such as a cylindrical or polygonal column, and the second liquid inlet 332 and the second liquid outlet 333 are respectively arranged at the two end walls of the cylindrical liquid storage member 33, or the second liquid inlet 332 and the second liquid outlet 333 are respectively arranged at the side walls of the cylindrical liquid storage member 33 near the two end walls. Of course, in other embodiments, the liquid storage member 33 may also be in other regular or irregular shapes such as a cone or a sphere, and the implementation of the present invention is not specifically limited here.

[0052] like Figure 6 As shown, the second heating element 34 is spiral and extends along a preset direction b. In this way, the contact area between the heat-conducting liquid 13 and the second heating element 34 can be increased, thereby increasing the heat exchange area between the heat-conducting liquid 13 and the second heating element 34 and improving the heat exchange effect between the heat-conducting liquid 13 and the second heating element 34.

[0053] like Figure 6As shown, when the heat-conducting liquid 13 flows through the inner wall of the liquid storage cavity 331, a boundary layer with a significant flow velocity gradient will be formed near the inner wall of the liquid storage cavity 331, and the thicker the boundary layer, the smaller the heat transfer coefficient of the heat-conducting liquid 13. Therefore, the connecting component 3 also includes a spoiler 35 arranged in the liquid storage cavity 331, and the surface of the spoiler 35 is irregular, so that the heat-conducting liquid 13 in the liquid storage cavity 331 can be converted from a laminar state to a turbulent state, reducing the thickness of the boundary layer of the heat-conducting liquid 13 and improving the heat transfer coefficient of the heat-conducting liquid 13. In addition, the spoiler 35 is spiral and extends along a preset direction b, so that the contact area between the heat-conducting liquid 13 and the spoiler 35 can be increased, and the spoiler effect of the spoiler 35 on the heat-conducting liquid 13 can be improved. Among them, the spoiler 35 can be arranged in the central area of ​​the liquid storage cavity 331, and can also be arranged on the inner wall of the liquid storage cavity 331.

[0054] like Figure 1 As shown, the present invention also provides a cooking device, comprising an inner pot 4 and the above-mentioned heating device. The heat generated by the first heating element 2 of the heating device can be evenly conducted to the two electric field plates 12 through the heat-conducting liquid 13 and the conductive nanoparticles 14, and diffused outward to the inner pot 4 through the two electric field plates 12, so that the temperature distribution in the inner pot 4 is uniform, so that the food in the inner pot 4 is evenly heated, and the cooking effect of the food is improved.

[0055] like Figure 1 to Figure 2 As shown, in one embodiment, the heating device is disposed on the top of the inner pot 4. Specifically, the electric field component 1 is disposed on the inner top wall of the inner pot 4, so that the food in the inner pot 4 can be baked through the electric field plate 12 facing the bottom of the inner pot 4, so that the surface of the food is evenly colored, further improving the cooking effect of the food. The connecting component 3 is disposed above the inner pot 4. Since the cooking device is also provided with other components such as a control device above the inner pot 4, the connecting component 3 can utilize the original space above the inner pot 4 to avoid increasing the overall volume of the cooking device. Of course, in other embodiments, the heating device can also be disposed at the bottom, rear side or both sides of the inner pot 4 as needed, as long as the uniformity of the temperature distribution in the inner pot 4 can be improved by the heating device, and the embodiments of the present invention are not specifically limited here.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A heating device, characterized in that: include: An electric field component (1) is provided with a cavity (11), the electric field component (1) comprising two electric field plates (12) arranged opposite to each other on two sides of the cavity (11), the two electric field plates (12) being respectively used to electrically connect to a positive electrode and a negative electrode of a power source to form an electric field, the electric field component (1) further comprising a heat-conducting liquid (13) and conductive nanoparticles (14) filled in the cavity (11); and, The first heating element (2) is arranged in the cavity (11).

2. The heating device according to claim 1, characterized in that The first heating element (2) comprises a heating tube (21), the heating tube (21) is laid on a preset plane, and the two electric field plates (12) are parallel to the preset plane.

3. The heating device according to claim 1, characterized in that: The electric field assembly (1) further comprises an insulating plate (15) arranged on the periphery of the first heating element (2), wherein two ends of the insulating plate (15) are respectively connected to the two electric field plates (12), and the insulating plate (15) and the two electric field plates (12) are arranged to form the cavity (11).

4. The heating device according to claim 1, characterized in that The electric field formed by the two electric field plates (12) is an alternating electric field.

5. The heating device according to claim 1, characterized in that: The electric field component (1) is further provided with a first liquid inlet (16) and a first liquid outlet (17) which are in communication with the cavity (11); the heating device further comprises a communication component (3) which is arranged outside the electric field component (1); The communication component (3) comprises a pipeline (31) and a liquid driving component (32) arranged on the pipeline (31); two ends of the pipeline (31) are respectively connected to the first liquid inlet (16) and the first liquid outlet (17).

6. The heating device according to claim 5, characterized in that: The connecting component (3) further comprises a liquid storage component (33) and a second heating component (34); the liquid storage component (33) is arranged on the pipeline (31); the liquid storage component (33) is provided with a liquid storage cavity (331); and the second heating component (34) is arranged in the liquid storage cavity (331).

7. The heating device according to claim 6, characterized in that The heat-conducting liquid (13) flows in the liquid storage chamber (331) along a preset direction, and the second heating element (34) is spiral-shaped and extends along the preset direction.

8. The heating device according to claim 6, characterized in that The heat-conducting liquid (13) flows in the liquid storage cavity (331) along a preset direction, and the connecting component (3) further comprises a spoiler (35) arranged in the liquid storage cavity (331), wherein the spoiler (35) is spiral-shaped and extends along a preset direction.

9. A cooking device, characterized in that: It comprises an inner container (4) and a heating device as claimed in any one of claims 1 to 8.

10. The cooking device according to claim 9, characterized in that The heating device is arranged on the top of the inner container (4).

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