Temperature control type sweet potato roaster with pressure regulator

Abstract

This application discloses a commercial sweet potato roasting machine with a voltage regulator and temperature control. It includes a housing and an internal power supply unit, a main power switch, a voltage regulator, a heater, a voltmeter, and a grounding wire. The power supply unit includes a live wire and a neutral wire, connected in series to form the main circuit. The voltmeter is connected in parallel across the heater. The voltage regulator has an exposed adjustment knob. The grounding wire connects the heater housing to the inner wall of the housing and includes an external grounding terminal. This invention uses a stepless voltage regulator to adapt to all stages of sweet potato roasting, replacing traditional induction head temperature control. It ensures consistent ripeness of sweet potatoes in the same batch, is easy to operate, has comprehensive safety protection, and is suitable for commercial scenarios such as street stalls and community shops. It is cost-effective and durable.

Description

Technical Field

[0001] This utility model relates to the field of cooking equipment technology, specifically to a pressure regulator-controlled sweet potato roasting machine. Background Technology

[0002] Commercial sweet potato roasting machines are core profit-generating equipment for street vendors, community convenience stores, and small food stalls. The core requirements are consistent doneness and standardized taste in batches of roasted sweet potatoes, while also considering the commercial attributes of "low-cost investment, high durability, and zero operational barriers." Currently, the market demand for commercial sweet potato roasting machines is strong, but existing equipment suffers from three major pain points that severely restrict the operational efficiency of small and medium-sized businesses: The temperature control and heat output of existing commercial sweet potato roasting machines are mismatched with the requirements of sweet potato roasting. These machines use a stop-and-go temperature control logic that cuts off the power when the temperature reaches the target and restarts when the temperature drops. The heating element can only operate at full power or stop completely. However, sweet potato roasting requires three stages: low heat for saccharification (converting starch into sugar), medium heat for cooking (making the inside soft), and high heat for charring (making the outer skin slightly charred and fragrant). The stop-and-go temperature control cannot gradually increase the heat output, resulting in either insufficient saccharification leading to unsweetened sweet potatoes or full-load heating causing the outer skin to burnt and the inside to be hard. This results in a low yield of qualified sweet potatoes per batch and a high proportion of wasted costs for merchants.

[0003] Inconsistent temperature control due to sensor head deviation leads to uneven cooking in batches. Existing equipment relies on temperature sensors for temperature control, but the distance deviation between the sensor head and the heating element during assembly is unavoidable. Even when adjusted to the same temperature control scale, significant temperature differences still exist in different areas of the oven. In commercial settings, each batch of sweet potatoes needs to be roasted, often resulting in some sweet potatoes being burnt while others are undercooked, affecting both taste and reputation, and increasing waste.

[0004] While a few "intelligent temperature control models" can alleviate the issue of overcooking, their cost and durability are not well-suited for commercial applications. These models rely on multiple electronic components, resulting in significantly higher procurement costs than traditional models. Furthermore, the sensors are prone to malfunction due to prolonged contact with sweet potato steam and sugar residue, leading to high maintenance costs in commercial settings. Additionally, the frequent start-stop cycles of intermittent temperature control shorten the lifespan of the heating element, further squeezing merchants' profit margins due to the increased annual cost of component replacements. Summary of the Invention

[0005] This utility model aims to solve one of the technical problems existing in the prior art.

[0006] This application provides a voltage regulator-controlled temperature-controlled sweet potato roaster, including a housing. The housing contains a power supply unit, a main power switch, a voltage regulator, a heater, and a voltage display meter. The power supply unit includes a live wire L and a neutral wire N. The power supply unit, the main power switch, the voltage regulator, and the heater are connected in series to form the main circuit. The main power switch is connected in series between the live wire L of the power supply unit and the voltage regulator. The other end of the heater is directly connected to the neutral wire N of the power supply unit to form a complete circuit. The voltage display meter is connected in parallel across the heater to display the operating voltage of the heater.

[0007] It also includes a grounding wire, which is electrically connected to the metal casing of the heater and the inner metal area of ​​the enclosure to achieve safe grounding protection.

[0008] The voltage regulator has an adjustment knob exposed on the side wall of the housing, and the adjustment knob is mechanically connected to the voltage regulator. The output voltage of the voltage regulator can be adjusted by rotating the knob.

[0009] The voltage display panel is embedded in the outer surface of the enclosure, making it easy for users to read voltage data intuitively.

[0010] The output voltage of the voltage regulator is linearly related to the heating power of the heater. By adjusting the voltage, the heat generation efficiency of the heater can be precisely controlled.

[0011] The grounding wire includes a grounding terminal that extends to the outside of the enclosure. The grounding terminal is used for electrical connection to an external grounding system to further enhance electrical safety.

[0012] The power supply unit is a 220V AC mains power supply unit, and its live wire L and neutral wire N are both equipped with leakage-proof insulated terminals.

[0013] The main power switch is a single-pole circuit breaker, which is detachably electrically connected to the live wire L of the power supply unit and the voltage regulator through conductive terminals, and is used to control the on and off of the main circuit.

[0014] The voltage display is a digital voltage display with a display accuracy of no less than 0.1V, used to accurately provide feedback on the real-time operating voltage of the heater.

[0015] The connection between the heater and the neutral wire N of the power supply unit uses a high-temperature resistant wire with a temperature resistance rating of not less than 200℃.

[0016] The beneficial effects of this utility model are as follows: 1. The pressure regulator can achieve wide-range continuous pressure adjustment, corresponding to the temperature range of each stage of sweet potato roasting, perfectly matching the three-stage requirements of "saccharification → ripening → caramelization": Saccharification stage: adjust to the appropriate low heat setting, slow roasting promotes the conversion of starch into sugar; Ripening stage: adjust to the appropriate medium heat setting, ensuring that the sweet potatoes in batches are soft inside at the same time; Caramelization stage: adjust to the appropriate high heat setting, achieving the standard taste of "slightly caramelized outside and sweet inside", significantly improving the qualified yield of sweet potatoes per batch and greatly reducing the loss cost for merchants.

[0017] 2. Abandoning the traditional temperature sensor, the power of the heater is locked directly through the voltage regulator parameters, resulting in minimal temperature differences throughout the oven. In commercial settings, when roasting different varieties of sweet potatoes in batches, the corresponding setting can be precisely matched to meet the requirements, ensuring that the sweet potatoes in the same oven have a high degree of consistency in ripeness and taste, thus meeting the commercial requirements of "standardized production".

[0018] 3. Using a voltage regulator as the core temperature control component eliminates complex electronic components, significantly reducing equipment procurement costs; the core components are commercially available common parts, resulting in low replacement costs. Simultaneously, the heating element is designed for high-temperature scenarios, supporting long-term continuous baking, effectively extending equipment lifespan and reducing equipment replacement costs for merchants. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the working process of the pressure regulator-controlled temperature-controlled sweet potato roaster in the embodiments of this application; Figure 2 This is a circuit diagram of a voltage regulator-controlled temperature-controlled sweet potato roaster in an embodiment of this application.

[0020] Figure Labels 1-Box body, 2-Power supply unit, 3-Main power switch, 4-Voltage regulator, 5-Heater, 6-Voltage display meter, 7-Grounding wire. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0022] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0023] The following description, in conjunction with the accompanying drawings, details the voltage regulator-controlled temperature-controlled sweet potato roaster provided in this application through specific embodiments and application scenarios.

[0024] Example 1: This application provides a voltage regulator-controlled temperature-controlled sweet potato roaster, including a housing 1. The housing 1 contains a power supply unit 2, a main power switch 3, a voltage regulator 4, a heater 5, and a voltage display meter 6. The power supply unit 2 includes a live wire L and a neutral wire N. The power supply unit 2, the main power switch 3, the voltage regulator 4, and the heater 5 are connected in series to form the main circuit. The main power switch 3 is connected in series between the live wire L of the power supply unit 2 and the voltage regulator 4. The other end of the heater 5 is directly connected to the neutral wire N of the power supply unit 2 to form a complete circuit. The voltage display meter 6 is connected in parallel across the heater 5 to display the operating voltage of the heater 5.

[0025] like Figures 1 to 2 As shown, due to the above structure, the power supply unit 2, main power switch 3, voltage regulator 4, and heater 5 form a stable main circuit through the live wire L and neutral wire N. The main power switch 3 can quickly cut off the live wire to ensure power safety in commercial scenarios. The voltage regulator 4 directly adjusts the voltage of the heater. With the parallel voltage display meter 6, merchants can accurately match the temperature requirements of roasted sweet potatoes through voltage, achieving basic temperature control of "saccharification → ripening → caramelization". More importantly, the voltage regulator 4 replaces the traditional induction head and directly locks the heating power, ensuring that the temperature of sweet potatoes roasted in the same batch (usually 4-8) is consistent throughout, completely solving the commercial pain point of "burnt in the front and undercooked in the back" in traditional sweet potato roasting machines, and ensuring the uniformity of taste of each batch.

[0026] Example 2: In this embodiment, in addition to the structural features of the aforementioned embodiments, a grounding wire 7 is also included. The grounding wire 7 is electrically connected to the metal outer shell of the heater 5 and the inner wall metal area of ​​the housing 1 to achieve safe grounding protection.

[0027] like Figures 1 to 2As shown, due to the above structure, the grounding wire 7 connects the outer shell of the heater 5 and the inner metal area of ​​the box 1, which is perfectly suited for commercial scenarios such as street stalls and damp stalls: when the sweet potato roasting machine roasts continuously for a long time, causing the insulation of the heater to age, the leakage current will be quickly conducted to the metal area of ​​the box, avoiding the current from accumulating on the surface of the box - especially suitable for stalls with high traffic, which can effectively prevent customers from being electrocuted when touching the box, and build a solid safety foundation for commercial equipment used frequently.

[0028] Example 3: In this embodiment, in addition to the structural features of the aforementioned embodiments, the voltage regulator 4 is provided with an adjustment knob exposed on the side wall of the housing 1, and the adjustment knob is mechanically connected to the voltage regulator 4. The output voltage of the voltage regulator 4 can be adjusted by rotating the knob.

[0029] like Figures 1 to 2 As shown, due to the above structure, the adjustment knob of the voltage regulator 4 is exposed on the side wall of the housing 1 and is mechanically connected to the voltage regulator 4. The user does not need to disassemble the housing 1. By rotating the external knob, the user can directly drive the voltage regulator 4 to change the output voltage. The mechanical transmission structure of the knob is stable and the operation is convenient and intuitive. This enables the user to quickly and in real-time fine-tune the temperature of the sweet potato roaster, greatly reducing the complexity of temperature control operation.

[0030] Example 4: In this embodiment, in addition to the structural features of the aforementioned embodiments, the display panel of the voltage display meter 6 is embedded on the outer surface of the housing 1, making it convenient for users to read voltage data intuitively.

[0031] like Figures 1 to 2 As shown, due to the above structure, the panel of the voltage display meter 6 is embedded outside the box 1, so the merchant does not need to open the box to check during the baking process. This avoids heat loss inside the box caused by frequent opening (which can shorten the baking time of each batch of sweet potatoes by about 10%), and also avoids the need to get close to the high-temperature box, which is especially suitable for quick operation when the stall is busy. The clearly readable voltage data allows the merchant to check the temperature stage of the sweet potatoes at any time, ensuring the stability of batch production.

[0032] Example 5: In this embodiment, in addition to the structural features of the aforementioned embodiments, the output voltage of the voltage regulator 4 is linearly related to the heating power of the heater 5, and the heat generation efficiency of the heater 5 can be precisely controlled by adjusting the voltage.

[0033] In this embodiment of the application, the grounding wire 7 includes a grounding terminal extending to the outside of the housing 1. The grounding terminal is used for electrical connection with an external grounding system to further improve electrical safety.

[0034] like Figures 1 to 2As shown, due to the above structure, the voltage of the voltage regulator 4 is linearly related to the power of the heater 5. Merchants can adjust the voltage smoothly according to the stages of sweet potato roasting: "saccharification (low heat), ripening (medium heat), and charring (high heat)"—avoiding sudden temperature jumps that cause the sweet potatoes to be "charred on the outside and raw on the inside." The grounding terminal extending to the outside of the box can be directly connected to the commercial grounding system of the street stall, forming a triple protection of "heater-box-ground," which is suitable for commercial scenarios with high traffic and complex power environments, further reducing the risk of leakage.

[0035] Example 6: In this embodiment, in addition to the structural features of the aforementioned embodiments, the power supply unit 2 is a 220V AC mains power supply unit 2, and its live wire L and neutral wire N are both equipped with leakage-proof insulated terminals.

[0036] like Figures 1 to 2 As shown, due to the above structure, the 220V AC power supply unit 2 can be directly connected to the regular sockets of street stalls and community shops without the need for additional dedicated power supply, which greatly reduces the deployment cost of commercial equipment. The leakage-proof insulated terminals can resist the corrosion of steam and sugar residue generated during the roasting process, and prevent short circuits due to moisture and aging at the wiring points, ensuring stable power supply for the equipment in the commercial scenario of "8 hours of continuous roasting per day".

[0037] Example 7: In this embodiment, in addition to the structural features of the aforementioned embodiments, the main power switch 3 is a single-pole circuit breaker, which is detachably electrically connected to the live wire L of the power supply unit 2 and the voltage regulator 4 through conductive terminals, and is used to control the on / off state of the main circuit.

[0038] like Figures 1 to 2 As shown, due to the above structure, the single-pole circuit breaker type main power switch 3 has an overload protection function - when the sweet potato roasting machine has an abnormal current due to long-term operation, it will automatically disconnect the circuit to prevent the equipment from burning out; the detachable conductive terminal design allows the stall owner to replace the switch by himself without professional maintenance, avoiding the impact of equipment downtime on the day's revenue, and adapting to the "low-cost and fast maintenance" needs of commercial scenarios.

[0039] Example 8: In this embodiment, in addition to the structural features of the aforementioned embodiments, the voltage display 6 is a digital voltage display 6 with a display accuracy of not less than 0.1V, used to accurately reflect the real-time operating voltage of the heater 5.

[0040] like Figures 1 to 2As shown, thanks to the aforementioned structure, the high precision (≤0.1V) of the digital voltage display meter 6 can accurately reflect the subtle voltage changes at different stages of roasting sweet potatoes—for example, the voltage difference between "honey sweet potato with charred skin" and "yellow sweet potato with charred skin" can be accurately distinguished, avoiding taste deviations; the digital display is clear and easy to read, and even in the low-light environment of a street stall at night, parameters can be quickly confirmed, ensuring that the taste of each batch of roasted sweet potatoes is consistent.

[0041] Example 9: In this embodiment, in addition to the structural features included in the aforementioned embodiments, the connection terminal between the heater 5 and the neutral wire N of the power supply unit 2 is made of a high-temperature resistant wire, and the temperature resistance rating of the high-temperature resistant wire is not lower than 200°C.

[0042] like Figures 1 to 2 As shown, due to the above structure, the high-temperature resistant wire with a temperature resistance of ≥200℃ can withstand the continuous high temperature around the heating element of the sweet potato roaster (the temperature of the heating zone of a commercial sweet potato roaster often reaches above 180℃ during operation), avoiding circuit failures caused by the melting and breakage of the insulation layer of ordinary wires; it is especially suitable for commercial scenarios of "daily batch roasting", effectively extending the service life of the equipment and reducing downtime for maintenance due to wire damage.

[0043] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0044] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A voltage regulator-controlled temperature-controlled sweet potato roaster, comprising a housing, characterized in that, The enclosure contains a power supply unit, a main power switch, a voltage regulator, a heater, and a voltage display meter. The power supply unit includes a live wire L and a neutral wire N. The power supply unit, the main power switch, the voltage regulator, and the heater are connected in series to form the main circuit. The main power switch is connected in series between the live wire L of the power supply unit and the voltage regulator. The other end of the heater is directly connected to the neutral wire N of the power supply unit to form a complete circuit. The voltage display meter is connected in parallel across the heater to display the operating voltage of the heater.

2. The voltage regulator-controlled temperature-controlled sweet potato roaster according to claim 1, characterized in that, It also includes a grounding wire, which is electrically connected to the metal casing of the heater and the inner metal area of ​​the housing to achieve safe grounding protection.

3. The temperature-controllable sweet potato roaster according to claim 1, wherein The voltage regulator is equipped with an adjustment knob exposed on the side wall of the housing, and the adjustment knob is mechanically connected to the voltage regulator. The output voltage of the voltage regulator can be adjusted by rotating the knob.

4. The temperature-controllable sweet potato roaster according to claim 1, wherein The display panel of the voltage display meter is embedded in the outer surface of the enclosure, making it easy for users to read voltage data intuitively.

5. The temperature-controllable sweet potato roaster according to claim 1, wherein The output voltage of the voltage regulator is linearly related to the heating power of the heater, and the heat generation efficiency of the heater can be precisely controlled by adjusting the voltage.

6. The temperature-controllable sweet potato roaster according to claim 2, wherein The grounding wire includes a grounding terminal extending to the outside of the enclosure. The grounding terminal is used for electrical connection with an external grounding system to further improve electrical safety.

7. The temperature-controllable sweet potato roaster according to claim 1, wherein The power supply unit is a 220V AC mains power supply unit, and its live wire L and neutral wire N are both equipped with leakage-proof insulated terminals.

8. The temperature-controllable sweet potato roaster according to claim 1, wherein, The main power switch is a single-pole circuit breaker, which is detachably electrically connected to the live wire L of the power supply unit and the voltage regulator through conductive terminals, and is used to control the on and off of the main circuit.

9. The voltage regulator-controlled temperature-controlled sweet potato roaster according to claim 1, characterized in that, The voltage display is a digital voltage display with a display accuracy of not less than 0.1V, used to accurately provide feedback on the real-time operating voltage of the heater.

10. The temperature-controllable sweet potato roaster according to claim 1, wherein The connection between the heater and the neutral line N of the power supply unit uses a high-temperature resistant wire, and the temperature resistance of the high-temperature resistant wire is not lower than 200℃.

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