Large electric cooker with uniform heating function

Abstract

The utility model relates to a large-scale electric cooker capable of heating uniformly. The large-scale electric cooker comprises an electric cooker main body with a three-ring heating structure and a control system, the control system comprises a control terminal and a frequency conversion control module electrically connected with the control terminal, and the frequency conversion control module is electrically connected with the three-ring heating structure of the electric cooker body and used for controlling the heating power of the three-ring heating structure to alternately change the boiling area of the electric cooker body. Variable frequency circulation control of each ring of the three-ring heating structure is changed through the control system, contact and heating uniformity of rice grains and water is improved, it is guaranteed that rice is evenly cooked, quality is improved, and market requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a large electric rice cooker that heats evenly. Background Technology

[0002] In modern catering services and collective canteens, large rice cookers play a vital role in meeting the needs of multiple people eating at the same time. The process of cooking rice in a rice cooker usually includes three stages: heating, boiling, and keeping warm. At the same time, large rice cookers and small rice cookers are different in size, structure, and output power. For example, the size of a large rice cooker is more than twice that of a small rice cooker, and its output power is also set accordingly.

[0003] Currently, most traditional large rice cookers have a single-ring or simple multi-ring fixed-power heating plate design. When cooking large quantities of rice, the rice grains tend to settle at the bottom of the inner pot and are difficult to move. Traditional heating methods concentrate the boiling point in the center of the inner pot, resulting in poor stirring of the rice grains at the bottom. This causes some rice grains to accumulate, preventing them from fully contacting the water and absorbing water evenly. Consequently, the cooked rice is often undercooked, with poor taste and quality, failing to meet consumers' demand for high-quality rice.

[0004] Based on the above, it can be seen that this utility model proposes a large electric rice cooker with uniform heating to at least partially solve the above problems. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a large electric rice cooker with uniform heating, which solves the problems of uneven heating in existing large electric rice cookers, resulting in poor stirring of rice grains, rice grain accumulation, and undercooked rice.

[0006] The objective of this utility model can be achieved through the following technical solution: a large electric rice cooker with uniform heating, comprising a rice cooker body with a three-ring heating structure and a control system; the control system includes a control terminal and a frequency converter control module electrically connected to the control terminal, the frequency converter control module being electrically connected to the three-ring heating structure of the rice cooker body, and used to control the heating power of the three-ring heating structure to alternately change the boiling zone of the rice cooker body.

[0007] As a preferred technical solution of this utility model, the control terminal further includes a timing control module, which is electrically connected to the control terminal and is used for frequency conversion cycle control of periodic sequential time.

[0008] As a preferred technical solution of this utility model, the timing control module receives and transmits signals to the control terminal, and through the terminal, instructs the frequency conversion control module to control the three-ring heating structure to change its output power from the inside to the outside or from the outside to the inside according to a set setting.

[0009] As a preferred embodiment of this utility model, the rice cooker body further includes an inner pot, the three-ring heating structure is located at the bottom of the rice cooker body, and the bottom of the inner pot is located directly above the three-ring heating structure through a sandwich structure.

[0010] As a preferred embodiment of this utility model, the sandwich structure is provided with a thermally conductive adhesive filling layer.

[0011] As a preferred technical solution of this utility model, the bottom of the inner liner is provided with a temperature feedback component corresponding to the boiling point of the three-ring heating structure through the sandwich structure. The temperature feedback component is located directly above the boiling point of each heating ring and is electrically connected to the control terminal to detect the temperature value of the corresponding boiling point.

[0012] The beneficial effects of this utility model are as follows: the three-ring heating structure and frequency conversion timing control realize dynamic and uniform heating of large-capacity rice cookers, significantly improving the uniformity and efficiency of rice cooking. At the same time, through temperature feedback and jacketed heat conduction technology, energy saving and safety (anti-overflow and anti-scorching) are taken into account. The flexible heating mode is suitable for different ingredients and scenarios, especially suitable for large-capacity cooking needs in canteens and restaurants. It fundamentally solves the problems of uneven heating and low efficiency of traditional large rice cookers, and has significant technical advantages and market application value. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of a large electric rice cooker with uniform heating according to an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of a three-ring heating structure of a large electric rice cooker with uniform heating according to an embodiment of the present invention.

[0016] Figure 3 This is a partial cross-sectional schematic diagram of a large electric rice cooker with uniform heating according to an embodiment of the present invention.

[0017] In the diagram: 100, main body of the rice cooker; 101, three-ring heating structure; 102, inner pot; 103, sandwich structure; 131, thermally conductive adhesive filler layer. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Please see Figure 1-3 As shown, this embodiment of the invention provides a large rice cooker with uniform heating. Designed for large-scale dining scenarios such as canteens, it features a spacious and large-capacity inner pot 102. Therefore, it requires an increased heating structure to match the inner pot 102. A three-ring heating structure 101 is adopted, comprising three concentric rings (outer, middle, and inner) arranged around the central axis of the rice cooker body 100. After the large inner pot 102 is placed inside, its circular bottom surface aligns with the center of the three-ring heating structure 101. This ensures that the inner pot 102 is heated evenly after the three-ring heating structure 101 outputs its power.

[0020] It's worth noting that during the rice cooking process, the rice cooker body 100 sequentially goes through a heating stage, a boiling stage, and a heat-preserving stage. The crucial stage for even heating and preventing undercooked rice is the boiling stage. The boiling action of water creates a circulating turbulence within the inner pot 102, centered on the boiling area. This causes the rice grains deposited in the water to move, ensuring even heating and sufficient water absorption, thus completing the cooking process. Because most large rice cookers lack specialized heating control, the core high-temperature zone always appears in the center, limiting the boiling area to the center. This central boiling zone has a limited impact, and the thicker, more compacted rice layers further away are difficult to stir and move with the boiling water flow. This results in some rice grains being undercooked due to insufficient heating and water absorption.

[0021] To address this issue, this embodiment provides a control system to regulate the boiling process of the three-ring heating structure 101, where heat is primarily concentrated at the center. This control system includes a control terminal as the core for computation and storage, and a frequency converter control module for controlling the heating power of the three-ring heating structure 101. By instructing the frequency converter control module to change its output frequency via the control terminal, the heating power of each of the three heating rings of the three-ring heating structure 101 is adjusted, causing a change in the highest temperature region at the bottom of the inner liner 102. This alters the position of the boiling region, allowing it to move and change. This movement of the boiling region affects the rice layer, which was previously far from the center and unable to be stirred, thereby increasing the uniformity of heating the rice layer.

[0022] Based on the above technical solutions, although the boiling zone position of the three-ring heating structure 101 can be changed by controlling the frequency converter module, it is impossible to more precisely control the output power and time variation of each heating ring. This easily leads to some areas being heated for too long, resulting in scorching, while other areas are heated for too short a time, resulting in undercooked rice, and the cooked rice has an inconsistent texture. To address the above problems, this embodiment provides a timing control module to solve the problem of not being able to precisely control the frequency converter output of each heating ring in the three-ring heating structure 101 at specific times. This module is equivalent to a timer, used for cyclical frequency conversion control of the boiling zone, allowing the three heating rings to cycle and exert power at set intervals. For example, the inner ring, middle ring, and outer ring may increase their heat at intervals of 1 minute, 30 seconds, and 20 seconds, respectively, so that the boiling zone is heated at regular intervals. By controlling the boiling zone at regular intervals and performing cyclical frequency conversion control of each ring, the heating process becomes more controllable and efficient.

[0023] Furthermore, although the timing control module provides periodic, sequential frequency conversion control for the three-ring heating structure 101, the structure consists of an inner ring, a middle ring, and an outer ring. The timing control module does not provide specific, orderly, timed cyclic control for each ring, which can easily lead to irregular changes in the heating power of the three rings, resulting in multiple rings simultaneously heating at high power or not heating at all, causing localized overheating or underheating within the pot. Therefore, this embodiment proposes using a terminal-specified frequency conversion control module to control the three-ring heating structure 101 to change its output power according to a set sequence, either from the inside out or from the outside in. Specifically, the timing control module transmits the pre-set timing signal to the control terminal. After receiving the signal, the control terminal instructs the frequency converter control module to control the three heating rings. The frequency converter control module heats each ring of the three-ring heating structure 101 in an orderly manner according to the pre-set rules. For example, if the setting is to change the power from the inside to the outside, initially, the timing control module tells the control terminal that the time has arrived, and the control terminal instructs the frequency converter control module to increase the heat of the inner ring heating ring and start high-power heating. When the set time arrives, the timing control module sends another signal, and the control terminal again instructs the frequency converter control module to increase the heat of the middle heating ring while decreasing the heat of the inner ring. When the set time arrives again, it is the outer ring heating ring's turn to increase the heat, while the middle and inner rings decrease the heat, and vice versa. This cycle continues, ensuring that the rice is heated evenly.

[0024] In this embodiment, the rice cooker body 100 also includes an inner pot 102. The three-ring heating structure 101 is located at the bottom of the rice cooker body 100. The bottom of the inner pot 102 is located directly above the three-ring heating structure 101 through a sandwich structure 103. The sandwich structure 103 has a heat-conducting adhesive filling layer 131 inside. Specifically, the circular bottom surface of the inner pot 102 is aligned with the center of the three-ring heating structure 101, but the inner pot 102 does not directly contact the three-ring heating structure 101. Instead, it indirectly contacts it through the sandwich structure 103. Moreover, the sandwich structure 103 is filled with heat-conducting adhesive. This connection method is mainly to allow the heat from the three heating rings to be transferred more evenly to the bottom of the inner pot 102 through the heat-conducting adhesive in the sandwich structure, avoiding the heating rings directly contacting the inner pot 102, which could lead to excessively high local temperatures or uneven heat transfer, and making the entire bottom of the pot more evenly heated.

[0025] Meanwhile, the bottom of the inner pot 102 is equipped with a temperature feedback component corresponding to the boiling point of the three-ring heating structure 101 via a sandwich structure 103. This temperature feedback component is located directly above the boiling point of each heating ring and is electrically connected to the control terminal to detect the temperature value of the corresponding boiling point. Specifically, a temperature feedback component is set at the bottom of the inner pot 102 corresponding to each of the three heating rings, located directly above the boiling point of each heating ring, to detect the temperature in real time and transmit the data to the control terminal. The temperature feedback component transmits the detected data to the rice cooker's control terminal in real time. Based on the received temperature information, the control terminal precisely adjusts the power of each heating ring to ensure that the rice at the bottom of the pot is heated evenly, avoiding local overheating that could lead to burning or underheating that could result in undercooked rice. This is especially suitable for scenarios such as canteens where large quantities of rice are cooked, ensuring that the cooked rice has a consistent taste and stable quality.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A large electric rice cooker capable of heating uniformly, characterized by comprising: This includes the main body of the rice cooker with a three-ring heating structure and the control system; The control system includes a control terminal and a frequency converter control module electrically connected to the control terminal. The frequency converter control module is electrically connected to the three-ring heating structure of the rice cooker body and is used to control the heating power of the three-ring heating structure to alternately change the boiling zone of the rice cooker body.

2. The large electric rice cooker for heating uniformly according to claim 1, wherein The control terminal also includes a timing control module, which is electrically connected to the control terminal and is used for frequency conversion cycle control of periodic sequential time.

3. The large electric rice cooker of claim 2, wherein The timing control module receives the transmission signal to the control terminal, and through the terminal, instructs the frequency conversion control module to control the three-ring heating structure to change its output power from the inside to the outside or from the outside to the inside according to the set parameters.

4. The large electric rice cooker of claim 1, wherein The rice cooker body also includes an inner pot, the three-ring heating structure is located at the bottom of the rice cooker body, and the bottom of the inner pot is located directly above the three-ring heating structure through a sandwich structure.

5. The large electric rice cooker of claim 4, wherein The sandwich structure has a thermally conductive adhesive filling layer inside.

6. The large electric rice cooker of uniform heating according to claim 4, wherein The bottom of the inner liner is equipped with a temperature feedback component corresponding to the boiling point of the three-ring heating structure through the sandwich structure. The temperature feedback component is located directly above the boiling point of each heating ring and is electrically connected to the control terminal to detect the temperature value of the corresponding boiling point.

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