Partitioned independent temperature control popcorn pot and heating control method
Patent Information
- Application Number
- CN202611209133.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-11
- Publication Date
- 2026-09-29
AI Technical Summary
现有爆米花机的温控精度普遍不足，温度波动幅度常达±8℃，远超爆米花成型所需的±2℃工艺窗口，导致玉米粒受热不均，部分颗粒未爆、焦糊粒混杂
[0013]本申请实施例可产生技术效果：通过将加热件分为中心区域和边缘区域两部分布置，并由各自的温控器独立控制形成并联回路，实现了对锅体不同区域温度的独立检测和独立控制，避免了传统单温控器控制双加热件时因热惯性导致的温度飙升问题，温度波动由±8℃降至±2℃以内，大幅提升了温控精度。
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Figure CN122827423A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of food processing equipment technology, and in particular to a popcorn popper with independent temperature control in different zones and its control method. Background Technology
[0002] Popcorn machines are widely used in cinemas, convenience stores, and commercial venues for on-site popcorn making, display, and sales. The machine heats the pot using an internal heating element, causing the corn kernels inside to pop. Precise temperature control is crucial during the heating process to ensure even heating and successful popping of the kernels.
[0003] Most existing popcorn machines use a single heating element with a single thermostat for overall temperature control. While some commercial models use dual heating elements, these are merely for power aggregation and still share a single thermostat, preventing independent temperature control for different areas of the popcorn. Once the thermostat reaches its operating temperature, the overall power and thermal inertia of the heating elements can cause the temperature to spike above 300°C. The temperature control accuracy of existing popcorn machines is generally insufficient, with temperature fluctuations often reaching ±8°C, far exceeding the ±2°C process window required for popcorn formation. This results in uneven heating of the kernels, with some kernels failing to pop and others becoming burnt. Furthermore, when using a single heating element, the temperature at the center of the popcorn is too high, while the edges are too low, leading to unevenly sized popcorn kernels and noticeable differences in taste. Summary of the Invention
[0004] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a popcorn pot with independent temperature control in different zones and its control method, which can independently detect and control the temperature of different zones of the pot, achieve precise graded heating, and improve the quality of popcorn.
[0005] A popcorn popper with independent temperature control in each zone according to a first aspect of this application includes:
[0006] Pot body;
[0007] A heat-conducting plate is disposed inside the pot body;
[0008] The first heating element is disposed in the central area of the heat-conducting plate;
[0009] The second heating element is disposed in the edge region of the heat-conducting plate;
[0010] The first temperature controller is located in the central area of the heat-conducting plate;
[0011] The second temperature controller is located in the edge area of the heat-conducting plate;
[0012] The first heating element is electrically connected to the first temperature controller to form a first independent heating circuit; the second heating element is electrically connected to the second temperature controller to form a second independent heating circuit; the first independent heating circuit and the second independent heating circuit are connected in parallel.
[0013] The embodiments of this application can produce the following technical effects: by arranging the heating element into two parts, a central area and an edge area, and independently controlling each part with its own thermostat to form a parallel circuit, independent detection and control of the temperature of different areas of the pot body can be achieved. This avoids the problem of temperature spikes caused by thermal inertia when a single thermostat controls two heating elements in the traditional way. Temperature fluctuations are reduced from ±8℃ to within ±2℃, which greatly improves the temperature control accuracy.
[0014] According to one embodiment provided in this application, the trigger temperature of the first thermostat is lower than the trigger temperature of the second thermostat. The trigger temperature of the central area thermostat is lower than the trigger temperature of the edge area thermostat, so that during the heating process, the central area reaches the trigger temperature first and cuts off the corresponding heating element, while the edge area reaches the trigger temperature later and cuts off the corresponding heating element, forming a graded power-off control to match the temperature requirements of different areas during the popcorn popping process.
[0015] According to one embodiment provided in this application, the trigger temperature of the first temperature controller is 140℃~160℃, and the trigger temperature of the second temperature controller is 190℃~210℃. It is understood that 140℃~160℃ and 190℃~210℃ are experimentally verified preferred trigger temperature ranges, capable of covering the optimal popping temperature range for different types of corn kernels. The central region reaches a lower temperature first and then the heating is cut off, while the edge region reaches a higher temperature later and then the heating is cut off, achieving graded temperature control.
[0016] According to one embodiment provided in this application, a temperature limiter is also included. The temperature limiter is installed on the main power supply line, and its trigger temperature is higher than that of the first and second temperature controllers. It is used to simultaneously cut off the first and second independent heating circuits when the temperature exceeds the trigger temperature of the temperature limiter. It is understood that the temperature limiter, as a main circuit safety protection device, has its trigger temperature set higher than that of the first and second temperature controllers. This ensures that the temperature limiter does not activate when both temperature controllers are working normally, and only intervenes when both temperature controllers fail or abnormally overheat, simultaneously cutting off both heating circuits to provide final safety protection and eliminate safety hazards caused by temperature controller failure.
[0017] According to one embodiment of this application, the pot body includes an upper pot and a lower pot. A heat-conducting plate is welded to the bottom of the upper pot, and the lower pot is located below the upper pot. A sealing ring is provided between the lower pot and the upper pot. The outer wall of the upper pot, the inner wall of the lower pot, and the sealing ring together form an electrical compartment. It is understood that the upper pot is the container for heating and expanding popcorn, and is the direct object of heat exposure. Welding the heat-conducting plate to the bottom of the upper pot can prevent heat loss. Meanwhile, the lower pot, located below the upper pot, along with the sealing ring, forms a sealed electrical compartment, which not only prevents oil and other liquids from seeping in but also further insulates the pot and reduces heat loss.
[0018] According to one embodiment of this application, the heat-conducting plate is a heat-conducting aluminum plate with a thickness ranging from 3mm to 5mm. Using an aluminum plate with a thickness ranging from 3mm to 5mm as the heat-conducting plate balances cost considerations while ensuring that heat can be transferred to the pot body quickly, evenly, and stably. Moreover, aluminum has a low density, which prevents the pot body from becoming too bulky.
[0019] According to one embodiment provided in this application, both the first heating element and the second heating element are electric heating tubes. It is understood that using electric heating tubes as heating elements results in a simple structure, low cost, and easy control; the power of the two heating elements can be flexibly configured according to actual heating needs, achieving uniform heating at the same power and differentiated heating areas at different power levels.
[0020] According to one embodiment of this application, both the first heating element and the second heating element are annular, and the first heating element and the second heating element are concentrically arranged. The concentric arrangement of the first and second heating elements in annular shape can make the heat transfer more uniform and stable in all directions of the bottom of the pot, avoiding differences in the temperature field in different directions, which would cause uneven heating of the popcorn.
[0021] According to one embodiment provided in this application, the first thermostat and the second thermostat are each independently selected from either a snap-action thermostat or a capillary thermostat. Snap-action thermostats have the advantages of crisp action and low cost, while capillary thermostats have the advantages of accurate temperature sensing and a wide adjustable range. They can be flexibly selected according to the temperature control accuracy requirements and cost considerations of different areas, and both can meet the temperature control needs of a popcorn maker.
[0022] A heating control method for a popcorn popper with independent temperature control in a partitioned area, according to a second aspect embodiment of this application, applied to the popcorn popper with independent temperature control in any one of the first aspect embodiments described above, includes the following steps:
[0023] When the popcorn pot with independent temperature control in each zone is started, the first heating element and the second heating element work simultaneously to heat the heat-conducting plate at full power.
[0024] When the first temperature controller detects that the temperature of the central area of the heat conduction plate reaches the trigger temperature of the first temperature controller, the first temperature controller is activated to cut off the first heating element, while the second heating element continues to work.
[0025] When the second temperature controller detects that the temperature of the edge area of the heat-conducting plate reaches the trigger temperature of the second temperature controller, the second temperature controller activates, cuts off the second heating element, and stops heating.
[0026] The control method of the second aspect of this application can achieve the following technical effects: by controlling the on and off of the dual heating elements in stages, rapid heating is achieved in the preheating stage, the central heating element is cut off after the trigger temperature is reached in the central area to enter the balanced heating stage, and heating is completely stopped after the trigger temperature is reached in the edge area. This achieves graded heating control for the popcorn popping process, which ensures rapid preheating and avoids scorching caused by overheating.
[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is an exploded structural diagram of a popcorn pot with independent temperature control in a partitioned area, provided in one embodiment of this application.
[0030] Figure 2 This is a bottom view of a popcorn pot (excluding the bottom pot) with independent temperature control in a partitioned area provided in an embodiment of this application.
[0031] Figure 3 This is a schematic diagram of the heating control circuit provided in an embodiment of this application.
[0032] Figure label:
[0033] 1. Pot lid assembly; 2. Upper pot; 3. Heat-conducting plate; 4. Second heating element; 5. First heating element; 6. First thermostat; 7. Second thermostat; 8. Temperature limiter; 9. Sealing ring; 10. Lower pot. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0036] The following is combined with Figures 1 to 3 This application describes a popcorn maker with independent temperature control in different zones and its control method.
[0037] like Figure 1 and Figure 2 As shown, a popcorn popper with independent temperature control in a partitioned area according to a first aspect embodiment of this application includes:
[0038] Pot body;
[0039] Heat-conducting plate 3 is disposed inside the pot body;
[0040] The first heating element 5 is disposed in the central area of the heat-conducting plate 3;
[0041] The second heating element 4 is disposed in the edge area of the heat-conducting plate 3;
[0042] The first temperature controller 6 is located in the central area of the heat-conducting plate 3;
[0043] The second temperature controller 7 is located in the edge area of the heat-conducting plate 3;
[0044] The first heating element 5 is electrically connected to the first temperature controller 6 to form a first independent heating circuit; the second heating element 4 is electrically connected to the second temperature controller 7 to form a second independent heating circuit; the first independent heating circuit and the second independent heating circuit are connected in parallel.
[0045] The embodiments of this application can produce the following technical effects: by arranging the heating element into two parts, a central area and an edge area, and independently controlling each part with its own thermostat to form a parallel circuit, independent detection and control of the temperature of different areas of the pot body can be achieved. This avoids the problem of temperature spikes caused by thermal inertia when a single thermostat controls two heating elements in the traditional way. Temperature fluctuations are reduced from ±8℃ to within ±2℃, which greatly improves the temperature control accuracy.
[0046] The first heating element 5 is located in the central area of the heat-conducting plate 3, and the second heating element 4 is located in the annular area at the edge of the heat-conducting plate 3. The two heating elements form a dual-temperature zone heating layout on the heat-conducting plate 3, with the first heating element 5 responsible for heating the central area of the pot and the second heating element 4 responsible for heating the edge area of the pot.
[0047] The first temperature controller 6 is in close contact with the center area of the heat-conducting plate 3, and the second temperature controller 7 is in close contact with the edge area of the heat-conducting plate 3. The first temperature controller 6 is used to detect the temperature of the center area of the heat-conducting plate 3, and the second temperature controller 7 is used to detect the temperature of the edge area of the heat-conducting plate 3.
[0048] like Figure 3 As shown, the first heating element 5 is electrically connected to the first temperature controller 6 to form a first independent heating circuit; the second heating element 4 is electrically connected to the second temperature controller 7 to form a second independent heating circuit. The first independent heating circuit and the second independent heating circuit are connected in parallel and are independent of each other, and can work alone or simultaneously.
[0049] According to one embodiment provided in this application, the trigger temperature of the first thermostat 6 is lower than the trigger temperature of the second thermostat 7.
[0050] Understandably, the trigger temperature of the central area thermostat is lower than that of the edge area thermostat, so that the central area reaches the trigger temperature first and cuts off the corresponding heating element during the heating process, while the edge area reaches the trigger temperature later and cuts off the corresponding heating element, forming a graded power-off control to match the temperature requirements of different areas during the popcorn popping process.
[0051] According to one embodiment provided in this application, the trigger temperature of the first thermostat 6 is 140°C to 160°C, and the trigger temperature of the second thermostat 7 is 190°C to 210°C.
[0052] Understandably, 140℃~160℃ and 190℃~210℃ are experimentally verified optimal trigger temperature ranges that can cover the optimal popping temperature range for different types of corn kernels. The central area reaches a lower temperature first and then the heating is cut off, while the peripheral area reaches a higher temperature later and then the heating is cut off, achieving graded temperature control.
[0053] According to other embodiments of this application, the trigger temperature of the first temperature controller 6 can also be set to 150°C, and the trigger temperature of the second temperature controller 7 can also be set to 200°C, as long as the trigger temperature of the first temperature controller 6 is lower than the trigger temperature of the second temperature controller 7. According to other embodiments of this application, the first temperature controller 6 and the second temperature controller 7 can also be adjustable temperature controllers, allowing users to adjust the trigger temperature according to different corn varieties or process requirements.
[0054] According to one embodiment provided in this application, the first thermostat 6 is in close contact with the central region of the heat-conducting plate 3, and the second thermostat 7 is in close contact with the edge region of the heat-conducting plate 3.
[0055] Understandably, the thermostat, which is in close contact with the surface of the heat-conducting plate 3, can accurately detect the real-time temperature of the corresponding area, avoid temperature control deviation caused by temperature lag, and ensure that the thermostats of each area can accurately respond to the temperature changes of their respective areas.
[0056] like Figure 3 As shown, according to one embodiment provided in this application, it further includes a temperature limiter 8, which is installed on the main power supply line. The trigger temperature of the temperature limiter 8 is higher than the trigger temperature of the first temperature controller 6 and the trigger temperature of the second temperature controller 7. It is used to simultaneously cut off the first independent heating circuit and the second independent heating circuit when the temperature exceeds the trigger temperature of the temperature limiter, so as to realize over-temperature protection.
[0057] Understandably, the temperature limiter 8, as a main circuit safety protection device, can simultaneously cut off both heating circuits when both temperature controllers fail or abnormally overheat, thus playing a final safety protection role and eliminating the safety hazards caused by the failure of a single temperature controller.
[0058] Please refer to it again. Figure 1 Furthermore, the pot body includes an upper pot 2 and a lower pot 10. A heat-conducting plate 3 is welded to the bottom of the upper pot 2; the lower pot 10 is located below the upper pot, and a sealing ring 9 is provided between the lower pot 10 and the upper pot 2. The outer wall of the upper pot 2, the inner wall of the lower pot 10, and the sealing ring 9 form an electrical compartment. It can be understood that the upper pot 2 is the container for heating and expanding popcorn, and is the direct object of heat exposure. Welding the heat-conducting plate 3 to the bottom of the upper pot 2 can prevent heat loss. Meanwhile, the lower pot 10 is located below the upper pot 2, and the internal space enclosed by the two pots and the sealing ring 9 forms a sealed electrical compartment, which can prevent oil and other liquids from seeping in, and further insulate against heat loss.
[0059] Furthermore, the heat-conducting plate 3 is selected from a heat-conducting aluminum plate, and the thickness of the heat-conducting aluminum plate ranges from 3mm to 5mm. Using an aluminum plate with a thickness range of 3mm to 5mm as the heat-conducting plate 3 balances cost and ensures that heat can be transferred quickly, evenly, and stably to the upper pot 2; moreover, aluminum has a low density, which will not make the pot body too bulky. It is understood that the heat-conducting plate 3 can also be made of other heat-conducting metal materials such as copper, stainless steel, or aluminum alloy, and the specific choice can be made according to requirements and cost constraints.
[0060] Furthermore, the popcorn pot also includes a lid assembly 1, which is detachably mounted on the top of the upper pot 2.
[0061] According to one embodiment provided in this application, both the first heating element 5 and the second heating element 4 are electric heating tubes, and the power of the first heating element 5 is the same as or different from the power of the second heating element 4.
[0062] It is understandable that using electric heating tubes as heating elements is simple in structure, low in cost, and easy to control; the power of the two heating elements can be flexibly configured according to actual heating needs. When the power is the same, the heating is uniform, and when the power is different, differentiated heating areas can be achieved to meet the heating needs of different types of corn kernels.
[0063] Preferably, both the first heating element 5 and the second heating element 4 are annular components, concentrically arranged. The annular first heating element 5 is located in the central region of the heat-conducting plate 3, and the annular second heating element 4 is located around the first heating element 5, near the edge of the heat-conducting plate 3. This concentric arrangement of the annular first heating element 5 and the second heating element 4 allows for more uniform and stable heat transfer in all directions around the bottom of the pot, preventing temperature differences in different directions and ensuring even heating of the popcorn. It is understood that the aforementioned annular component is not a complete ring, but rather... Figure 3 The notched ring shown in the embodiment.
[0064] According to other embodiments of this application, the heating element may also be a PTC heater, a thick film heating plate, an electromagnetic induction heating coil, or other equivalent elements with heating function, as long as it can achieve partitioned arrangement and heat conduction plate 3 is heated; the use of electric heating tube is only a preferred embodiment, and those skilled in the art can select appropriate heating element type according to actual cost, heating efficiency and manufacturing process requirements.
[0065] According to one embodiment provided in this application, the first thermostat 6 and the second thermostat 7 are each independently selected from a snap-action thermostat or a capillary thermostat.
[0066] Understandably, the first thermostat 6 and the second thermostat 7 can each be independently selected as either a snap-action thermostat or a capillary thermostat. Snap-action thermostats have the advantages of crisp action and low price, while capillary thermostats have the advantages of accurate temperature sensing and a wide adjustable range. They can be flexibly selected according to the temperature control accuracy requirements and cost considerations of different areas. Both can meet the temperature control requirements of popcorn pots.
[0067] According to other embodiments of this application, the temperature controller can also be an electronic temperature controller or a thermistor combined with a control circuit to realize temperature detection and control, as long as it can detect the temperature of the corresponding area of the heat-conducting plate 3 and output a control signal.
[0068] The working principle and technical effects of the popcorn pot described in this application will be further explained below in conjunction with the heating control process.
[0069] A heating control method for a popcorn pot with independent temperature control in different zones, according to a second aspect of this application, includes the following steps:
[0070] When the popcorn pot with independent temperature control in each zone is started, the first heating element 5 and the second heating element 4 work simultaneously to heat the heat-conducting plate 3 at full power.
[0071] When the first temperature controller 6 detects that the temperature of the central area of the heat conduction plate 3 reaches the trigger temperature of the first temperature controller 6, the first temperature controller 6 is activated to cut off the first heating element 5, while the second heating element 4 continues to work.
[0072] When the second temperature controller 7 detects that the temperature of the edge area of the heat conduction plate 3 reaches the trigger temperature of the second temperature controller 7, the second temperature controller 7 activates, cuts off the second heating element 4, and stops heating.
[0073] Specifically, in the popcorn-making process, corn kernels, sugar, oil, and other ingredients are placed into the upper pot 2, the pot lid assembly 1 is closed, and the power is turned on to start the equipment. The first heating element 5 and the second heating element 4 work simultaneously to rapidly heat the heat-conducting plate 3 at full power, causing the pot temperature to rise quickly to the temperature range required for the corn kernels to pop.
[0074] When the temperature in the central area of the heat-conducting plate 3 reaches the trigger temperature (approximately 150°C) of the first temperature controller 6, the first temperature controller 6 activates, independently cutting off the first heating element 5. The equipment then enters the medium-power balanced heating stage, with only the second heating element 4 continuing to operate. At this time, since the heating element in the central area has been cut off, the central temperature is controlled, preventing scorching caused by overheating in the central area. The second heating element 4 in the edge area continues to heat, causing the temperature in the edge area to continue to rise, thus meeting the high-temperature conditions required for the corn kernels to burst.
[0075] When the temperature of the edge area of the heat-conducting plate 3 reaches the trigger temperature of the second temperature controller 7 (approximately 200°C), the second temperature controller 7 activates, independently cutting off the second heating element 4, and heating completely stops. Throughout the heating process, the temperature limiter 8 continuously monitors the total circuit temperature, and when the temperature exceeds the safety threshold, it simultaneously cuts off both heating circuits to achieve over-temperature safety protection.
[0076] Compared with traditional popcorn poppers that use a single thermostat to control dual heating elements, the popcorn popper with independent temperature control in this application and its control method have the following advantages:
[0077] First, the temperature control accuracy has been greatly improved: by using dual temperature controllers to detect and control the temperature of the central area and the edge area respectively, the temperature fluctuation has been reduced from ±8℃ to within ±2℃, perfectly matching the ±2℃ process window required for popcorn forming.
[0078] Second, heating uniformity is significantly improved: the dual heating elements are arranged in zones to eliminate the temperature difference between the center and the edge, and the bursting rate is increased to over 98%.
[0079] Third, the graded control is highly targeted: the graded start-stop control logic is designed for the popcorn popping process. The central area reaches a lower temperature first and then the heating is cut off, while the edge area reaches a higher temperature later and then the heating is cut off. This achieves dedicated temperature control for the popcorn popping process, which is not a general heating method and effectively reduces the scorching rate.
[0080] Fourth, high safety: The temperature limiter 8 serves as the main circuit safety protection, and can simultaneously cut off both heating circuits when both temperature controllers fail, eliminating the safety hazards caused by the failure of a single temperature controller.
[0081] Fifth, extended heating element life: By using dual heating elements instead of a single heating element, the total length of the heating element increases while the machine power remains unchanged, the surface heat load decreases, the thermal inertia of the heating element is reduced, and the service life of the heating element is improved.
[0082] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0083] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.
[0084] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.
Claims
1. A popcorn popper with independent temperature control in separate zones, characterized in that, include: Pot body; A heat-conducting plate is disposed inside the pot body; The first heating element is disposed in the central area of the heat-conducting plate; The second heating element is disposed in the edge region of the heat-conducting plate; The first temperature controller is located in the central area of the heat-conducting plate; The second temperature controller is located in the edge area of the heat-conducting plate; The first heating element is electrically connected to the first temperature controller to form a first independent heating circuit; the second heating element is electrically connected to the second temperature controller to form a second independent heating circuit; the first independent heating circuit and the second independent heating circuit are connected in parallel.
2. The popcorn popper with independent temperature control in each zone according to claim 1, characterized in that, The trigger temperature of the first temperature controller is lower than the trigger temperature of the second temperature controller.
3. The popcorn popper with independent temperature control in zones according to claim 2, characterized in that, The trigger temperature of the first thermostat is 140℃~160℃, and the trigger temperature of the second thermostat is 190℃~210℃.
4. The popcorn popper with independent temperature control in each zone according to claim 1, characterized in that, It also includes a temperature limiter, which is installed on the main power supply line. The trigger temperature of the temperature limiter is higher than the trigger temperature of the first temperature controller and the trigger temperature of the second temperature controller. It is used to simultaneously cut off the first independent heating circuit and the second independent heating circuit when the temperature exceeds the trigger temperature of the temperature limiter.
5. The popcorn popper with independent temperature control in each zone according to any one of claims 1 to 4, characterized in that, The pot body includes an upper pot and a lower pot. The heat-conducting plate is welded to the bottom of the upper pot, and the lower pot is located below the upper pot. A sealing ring is provided between the lower pot and the upper pot. The outer wall of the upper pot, the inner wall of the lower pot, and the sealing ring form an electrical compartment.
6. The popcorn popper with independent temperature control in zones according to claim 5, characterized in that, The heat-conducting plate is a heat-conducting aluminum plate, and the thickness of the heat-conducting aluminum plate ranges from 3mm to 5mm.
7. The popcorn popper with independent temperature control in each zone according to any one of claims 1 to 4, characterized in that, Both the first heating element and the second heating element are electric heating tubes.
8. The popcorn popper with independent temperature control in zones according to claim 7, characterized in that, Both the first heating element and the second heating element are annular components, and the first heating element and the second heating element are concentrically arranged.
9. The popcorn popper with independent temperature control in each zone according to claim 1, characterized in that, The first thermostat and the second thermostat are each independently selected from either a snap-action thermostat or a capillary thermostat.
10. A heating control method for a popcorn popper with independent temperature control in each of claims 1 to 9, characterized in that, Includes the following steps: When the popcorn pot with independent temperature control in each zone is started, the first heating element and the second heating element work simultaneously to heat the heat-conducting plate at full power. When the first temperature controller detects that the temperature of the central area of the heat conduction plate reaches the trigger temperature of the first temperature controller, the first temperature controller is activated to cut off the first heating element, while the second heating element continues to work. When the second temperature controller detects that the temperature of the edge area of the heat-conducting plate reaches the trigger temperature of the second temperature controller, the second temperature controller activates, cuts off the second heating element, and stops heating.