Frying and baking machine

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a frying and baking machine which comprises a shell, a baking tray installed in the shell and a heating piece located between the baking tray and the shell, the baking tray is provided with a heating surface facing one side of the heating piece and a frying and baking surface deviating from one side of the heating piece, and a kick type temperature controller and a heat dissipation channel are further arranged in the shell. The temperature sensing end of the temperature controller abuts against the heating surface, a bimetallic strip capable of deforming along with the temperature change of the baking tray is arranged in the temperature controller, at least part of the temperature controller is located in the heat dissipation channel, the shell is provided with an air inlet and an air outlet which are communicated with the outside, and the heat dissipation channel is communicated between the air inlet and the air outlet. Based on the low-cost kick type temperature controller, on the premise that a high-cost temperature controller does not need to be replaced, the temperature controller is cooled through the cooling channel so that the temperature controller can be rapidly reset or delayed to be tripped off, and therefore the total cooking time and the heating period are shortened, and the heating efficiency of the frying and baking machine is improved.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a grilling machine. Background Technology

[0002] Grills typically have a thermostat to control the heating temperature of the grill pan. Common thermostats include snap-action thermostats and NTC thermostats. NTC thermostats calculate temperature changes by measuring the resistance change of an NTC thermistor, thus achieving precise temperature control. However, they are easily affected by ambient magnetic fields and are relatively expensive.

[0003] Most existing grills use low-cost snap-action thermostats. These thermostats operate on the principle of a bimetallic strip, composed of two metals with different coefficients of thermal expansion. When the grill pan temperature changes, these two metals expand or contract at different rates, causing the bimetallic strip to bend. Therefore, when the grill pan temperature reaches the preset trip temperature, the bimetallic strip bends rapidly, triggering the switch to disconnect, stopping the heating element and preventing food from burning or damage to internal components due to overheating. When the temperature drops to the preset reset temperature, the switch resets, and the heating element resumes heating the grill pan. However, in grills, the temperature difference between the trip temperature and reset temperature of the snap-action thermostat is around 10°C. This results in the thermostat tripping too quickly and resetting too slowly, leading to short heating times for the heating element and excessively long heating cycles for the grill pan, resulting in low heating efficiency. Utility Model Content

[0004] This invention provides a grill that solves the problem in the prior art where there is a temperature difference between the on and off states of a snap-action thermostat, the thermostat trips too quickly and takes too long to reset, resulting in low heating efficiency, while replacing it with a higher-spec thermostat would increase costs.

[0005] The technical solution adopted by this utility model is as follows: This utility model provides a grill, including a shell, a baking pan installed in the shell, and a heating element located between the baking pan and the shell. The baking pan has a heating surface facing the heating element and a grilling surface away from the heating element. The shell is also provided with a snap-action thermostat and a heat dissipation channel. The temperature sensing end of the thermostat abuts against the heating surface, and the thermostat has a bimetallic strip inside that can deform with the temperature change of the baking pan. The thermostat is at least partially located in the heat dissipation channel. The shell has an air inlet and an air outlet communicating with the outside. The heat dissipation channel connects the air inlet and the air outlet.

[0006] The grill provided by this utility model employs a snap-action thermostat. Based on the deformation of a bimetallic strip with temperature changes, it switches between on and off states, achieving temperature control of the grill pan at a low cost. A heat dissipation channel is incorporated, with an air inlet and outlet on the casing connected to the outside. Cold air from the outside enters the heat dissipation channel through the air inlet, exchanges heat with the thermostat, and carries away its heat. Hot air is then discharged to the outside through the air outlet, achieving cyclical heat dissipation for the thermostat. By utilizing heat dissipation channels to achieve air cooling or autonomous temperature control of the thermostat, two advantages can be achieved. First, it can delay the thermostat's tripping. For example, when cooling the thermostat while it is on, it ensures that the thermostat will trip after reaching the preset temperature. Compared to not dissipating heat from the thermostat, the tripping will be delayed, extending the heating time of the heating element. This allows the baking pan to have more heat reserves, which helps to shorten cooking time and improve heating efficiency. Second, it can accelerate the thermostat's reset. For example, when cooling the thermostat while it is off, it can quickly reset, reducing the empty time of the baking pan (the time when heating stops). This allows the grill to quickly enter the next heating cycle, shortening the heating cycle and making it more compact, thus improving heating efficiency and enabling rapid food preparation.

[0007] In summary, this application utilizes a low-cost snap-action thermostat, which, without requiring replacement with a high-cost thermostat, dissipates heat through a heat dissipation channel to enable the thermostat to quickly reset or delay tripping, thereby shortening the total cooking time and heating cycle and improving the heating efficiency of the grill.

[0008] In a preferred embodiment, the air outlet is at least partially higher than the thermostat, and the heat dissipation channel includes a drainage section that extends obliquely upward from the thermostat toward the air outlet.

[0009] By setting the air outlet to be at least partially higher than the thermostat, and including a cooling channel with an upward-sloping guide section extending from the thermostat towards the air outlet, outside cold air enters the cooling channel from the air inlet and exchanges heat with the thermostat, forming hot air with a density and gravity greater than the surrounding air. This causes the hot air to experience buoyancy greater than its own weight, allowing it to rise naturally. Therefore, guided by the upward-sloping guide section, the hot air is expelled from the air outlet more quickly, increasing airflow speed, accelerating thermostat heat dissipation, allowing the thermostat to reset quickly, and improving the heating efficiency of the grill.

[0010] In a more preferred embodiment, the heat dissipation channel includes a mounting section for accommodating the thermostat and a first converging section with a reduced cross-sectional area relative to the mounting section, the first converging section being connected to the air outlet via the guiding section.

[0011] By setting the installation section to accommodate the thermostat and reducing the cross-sectional area of ​​the first converging section compared to the installation section, when the airflow in the heat dissipation channel flows from the installation section to the first converging section, the reduced flow cross-section accelerates the airflow, thus improving the heat dissipation efficiency of the thermostat. The first converging section is connected to the air outlet through the guide section. Therefore, the combined effect of the first converging section and the guide section further accelerates the heat dissipation of the thermostat, enabling the thermostat to reset quickly and effectively improving the heating efficiency of the grill.

[0012] In another preferred embodiment, the drainage section includes a connecting portion near the thermostat and a noise reduction portion near the air outlet, wherein the cross-sectional area of ​​the noise reduction portion is enlarged relative to the connecting portion.

[0013] By setting the airflow section as a connecting part and a noise reduction part, and increasing the cross-sectional area of ​​the noise reduction part relative to the connecting part, the airflow slows down as it passes through the connecting part and the noise reduction part and is discharged to the air outlet. This reduces the wind noise caused by the rapid discharge of airflow, lowers the operating noise, and improves the user experience.

[0014] In a preferred embodiment, the heat dissipation channel includes a mounting section that accommodates the temperature controller and a first converging section with a reduced cross-sectional area relative to the mounting section, the first converging section being connected to an air outlet;

[0015] By setting up an installation section and a first flow-concentrating section, the cross-sectional area of ​​the first flow-concentrating section is reduced relative to the installation section, which can increase the airflow speed and improve heat dissipation efficiency.

[0016] In a preferred embodiment, the heat dissipation channel includes an air intake section arranged sequentially from the air inlet toward the temperature controller, a second converging section with a smaller cross-sectional area relative to the air intake section, and a mounting section that accommodates the temperature controller.

[0017] By setting an air intake section, a second converging section, and a mounting section for accommodating the thermostat from the air inlet towards the thermostat, the airflow is accelerated through the second converging section with a reduced cross-sectional area on the path from the air inlet to the thermostat. This increases the speed at which the airflow flows towards the thermostat, accelerates the air intake rate, and improves the thermostat's heat dissipation efficiency.

[0018] In a preferred embodiment, the air inlet is vertically aligned with the thermostat, and the heat dissipation channel includes a mounting section that accommodates the thermostat and extends vertically. One end of the mounting section abuts against the heated surface of the baking pan, and the other end connects to the edge of the air inlet.

[0019] By aligning the air inlet vertically with the thermostat, the distance between the thermostat and the outside cold air is reduced. After entering through the air inlet, the cold air directly exchanges heat with the thermostat, thus dissipating heat from the thermostat. This shortens the heat dissipation path, improves heat dissipation efficiency, and accelerates the thermostat's reset or delays its tripping.

[0020] In a preferred embodiment, the air inlet and air outlet are respectively located on two opposite side walls of the housing.

[0021] By placing the air inlet and outlet on opposite side walls of the housing, convection is created, avoiding bends in the airflow path and achieving smooth airflow and efficient heat dissipation. Furthermore, since both the air inlet and outlet are on the side walls of the housing, compared to having them on the bottom wall, it prevents debris and water from entering the housing through the inlet or outlet, thus protecting the internal electrical components.

[0022] In a preferred embodiment, the housing is further provided with a cooling fan that drives the airflow within the heat dissipation channel.

[0023] By installing a cooling fan inside the heat dissipation channel, the cooling fan can accelerate the airflow within the channel, allowing cool air to pass over the thermostat more quickly and carry away its heat. In addition, the fan can expedite the discharge of hot air that has exchanged heat with the thermostat, reducing the time hot air stays in the heat dissipation channel and achieving efficient heat dissipation.

[0024] In a more preferred embodiment, the cooling fan is fixed at the air inlet located directly opposite the temperature controller.

[0025] By fixing the cooling fan at the air inlet directly opposite the thermostat, cold air is concentrated at the air inlet, increasing the airflow into the heat dissipation channel, so that the heat of the thermostat is quickly carried away.

[0026] In a preferred embodiment, the housing is further provided with a cooking cavity located on the grilling side, and a steam port is provided on the side wall of the housing to connect the cooking cavity with the outside. The steam port and the air outlet are located on the same side of the housing, and the steam port is located above the air outlet.

[0027] By creating steam vents on the side wall of the casing, moisture from the food inside the cooking chamber can escape through the vents, preventing the food from becoming soggy during frying or grilling and improving the taste and quality of the cooked food. By placing the steam vent and the exhaust vent on the same side of the casing, with the steam vent positioned above the exhaust vent, the airflow from the exhaust vent can quickly and disperse the steam exiting the steam vent upwards, preventing steam from concentrating at the steam vent and condensing back. Furthermore, it cools the steam exiting the steam vent, preventing scalding and improving user safety.

[0028] In a preferred embodiment, the grill further includes a mounting cover that surrounds the thermostat, the mounting cover fixing the thermostat inside the housing and causing the thermostat to abut against the heated surface of the grill pan, the mounting cover having a first connecting port and a second connecting port, and the heat dissipation channel including an air inlet channel connecting the first connecting port and the air inlet and an air outlet channel connecting the second connecting port and the air outlet.

[0029] By installing a mounting cover, the thermostat is protected and its lifespan is extended. This prevents external environmental interference and improves the thermostat's detection sensitivity. Furthermore, the mounting cover secures the thermostat within the housing, ensuring contact between the thermostat and the heated surface of the baking tray, thus guaranteeing reliable installation and detection. The first and second connecting ports on the mounting cover allow the air inlet, mounting cover, and outlet channels to work together to concentrate airflow, achieving efficient heat dissipation for the thermostat. The mounting cover not only secures the thermostat but also integrates airflow concentration, simplifying the overall structure of the machine.

[0030] In a preferred embodiment, the baking tray is fixed inside the housing, and the temperature controller is fixedly installed on the heated surface of the baking tray; or, the baking tray is detachable from the housing, the heating element includes a heating plate fixed inside the housing and a heating tube fixed to the heating plate, and the temperature controller is fixedly installed on the side of the heating plate facing the baking tray.

[0031] Some grill pans are detachable for easy cleaning, while others have the pan fixed to the casing for user convenience. When the pan is fixed inside the casing, the thermostat is positioned on the heated surface of the pan, ensuring close proximity, sensitive temperature detection, and high control accuracy. When the pan is detachable from the casing, allowing for flexible use and cleaning, the thermostat is fixed to the side of the heating plate facing the pan. This ensures reliable detection while preventing damage from frequent pan removal and simplifies wiring between the thermostat and the internal control unit.

[0032] In a preferred embodiment, the heating element includes a heating tube disposed around the center of the baking pan, with an opening formed between the two ends of the heating tube, and the thermostat located at the opening;

[0033] An opening is formed between the two ends of the heating element, creating a relatively low-temperature zone. The thermostat is placed at the opening, which reduces the heat radiation from the heating element to the thermostat, reducing the risk of heat damage to the thermostat. At the same time, it allows the thermostat to quickly reset or delay tripping, shortening the cooking cycle and improving cooking efficiency.

[0034] In a preferred embodiment, the heating element includes a heating tube, and the housing is further provided with a cooling fan that drives the airflow in the heat dissipation channel. The cooling fan is connected in series with the heating tube, and the temperature controller is connected in parallel across the two ends of the cooling fan.

[0035] By connecting the cooling fan and heating element in series, and the thermostat in parallel across the cooling fan, when the thermostat trips, the cooling fan's power is relatively low due to its connection with the heating element, resulting in a small current flowing through both the fan and the heating element. Consequently, the heating element generates minimal heat, almost to the point of not working. When the thermostat resets and conducts, it short-circuits the cooling fan, increasing the current flowing through the heating element and thus generating more heat. This effectively achieves alternating operation of the cooling fan and heating element. This reduces unnecessary power loss caused by the cooling fan operating while the heating element is working (before the thermostat trips and resets), and avoids situations where simultaneous operation of the cooling fan and heating element leads to a high baking pan temperature, hindering the thermostat's rapid reset. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the grill machine in Embodiment 1 of this utility model;

[0038] Figure 2 This is a schematic diagram of the grill machine in Embodiment 2 of this utility model;

[0039] Figure 3 This is a schematic diagram of the grill machine in Embodiment 3 of this utility model;

[0040] Figure 4 This is the circuit diagram of the grill machine in Embodiment 4 of this utility model.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10. Housing; 11. Air inlet; 12. Air outlet; 13. Steam outlet; 20. Baking tray; 30. Heating element; 31. Heating tube; 40. Thermostat; 50. Heat dissipation channel; 51. Drainage section; 511. Connecting part ； 512. Noise Reduction Section ； 52. Installation section; 53. First current convergence section; 54. Second current convergence section; 55. Air inlet section; 60. Cooling fan; 70. Circuit board; 80. Indicator light; 90. Switch. Detailed Implementation

[0043] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0045] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] like Figure 1As shown, in one embodiment of the present invention, a grill is provided, including a housing 10, a grilling pan 20 installed inside the housing 10, and a heating element 30 located between the grilling pan 20 and the housing 10. The grilling pan 20 has a heating surface facing the heating element 30 and a grilling surface away from the heating element 30. The housing 10 is also provided with a snap-action thermostat 40 and a heat dissipation channel 50. The temperature sensing end of the thermostat 40 abuts against the heating surface, and the thermostat 40 is provided with a bimetallic strip (not shown) that can deform with the temperature change of the grilling pan 20. The thermostat 40 is at least partially located in the heat dissipation channel 50. The housing 10 is provided with an air inlet 11 and an air outlet 12 communicating with the outside. The heat dissipation channel 50 connects the air inlet 11 and the air outlet 12.

[0049] The grill provided by this utility model uses a snap-action thermostat 40, which switches between tripping and conducting states based on the deformation of the bimetallic strip as the temperature changes, achieving temperature control of the grill pan 20 at a low cost. A heat dissipation channel 50 is provided, with an air inlet 11 and an air outlet 12 on the housing 10 communicating with the outside. The heat dissipation channel 50 connects the air inlet 11 and the air outlet 12. Cold air from the outside enters the heat dissipation channel 50 through the air inlet 11, exchanges heat with the thermostat 40, and carries away the heat from the thermostat 40. The hot air is then discharged to the outside through the air outlet 12, achieving circulating heat dissipation for the thermostat 40. By utilizing the heat dissipation channel 50 to achieve air cooling or autonomous cooling of the thermostat 40, two advantages are achieved. First, the tripping of the thermostat 40 can be delayed. For example, during the preheating stage of the grill, when the thermostat 40 is in the conducting state and cooling is applied to it, the tripping of the thermostat 40 is delayed compared to the case where the thermostat 40 is not cooled. This extends the heating time of the heating element, allowing the grill pan 20 to have more heat reserves, which helps to shorten the cooking time and improve heating efficiency. Second, the reset of the thermostat 40 can be accelerated. For example, when cooling the thermostat 40 in the tripped state, the thermostat 40 can be reset quickly, reducing the empty time of the grill pan 20 (the time when heating stops), allowing the grill to quickly enter the next heating cycle, shortening the heating cycle, making the heating cycle more compact, improving heating efficiency, and enabling rapid food preparation.

[0050] In summary, this application, based on a low-cost snap-action thermostat 40, utilizes a heat dissipation channel to cool the thermostat 40, enabling it to quickly reset or delay tripping without needing to replace the high-cost thermostat 40. This shortens the cooking time and heating cycle, thereby improving the heating efficiency of the grill.

[0051] It should be noted that this utility model does not limit the specific form of the heat dissipation channel. For example, it can adopt any one of the following embodiments 1-3:

[0052] Implementation Example 1, such as Figure 1 As shown, the air outlet 12 is at least partially higher than the thermostat 40, that is, the upper edge of the air outlet is higher than the upper end of the thermostat 40. The heat dissipation channel 50 includes a flow guide section 51 that extends obliquely from the thermostat 40 toward the air outlet 12 from bottom to top.

[0053] By setting the air outlet 12 to be at least partially higher than the thermostat 40, and the heat dissipation channel 50 including a guide section 51 extending upwards from the thermostat 40 toward the air outlet 12, cold outside air enters the heat dissipation channel 50 from the air inlet 11 and exchanges heat with the thermostat 40, forming hot air with a density and gravity greater than the surrounding air. This causes the hot air to experience buoyancy greater than its own weight and rise naturally. Therefore, guided by the upwardly extending guide section 51, the hot air is discharged from the air outlet 12 more quickly, thereby increasing the airflow speed, accelerating the heat dissipation of the thermostat 40, allowing the thermostat 40 to reset quickly or delay tripping, and improving the heating efficiency of the grill.

[0054] like Figure 1 As shown, more preferably, in this embodiment, the heat dissipation channel 50 further includes a mounting section 52 for accommodating the temperature controller 40 and a first converging section 53 with a reduced cross-sectional area relative to the mounting section 52. The first converging section 53 is connected to the air outlet 12 through a guide section 51.

[0055] Optionally, the thermostat 40 may be completely housed within the mounting section 52; alternatively, the thermostat 40 may be partially inserted into the mounting section 52 or partially exposed outside the mounting section 52.

[0056] By accommodating the thermostat 40 in the mounting section 52 and reducing the cross-sectional area of ​​the first converging section 53 compared to the mounting section 52, when the airflow in the heat dissipation channel 50 flows from the mounting section 52 to the first converging section 53, the reduced flow cross-section accelerates the airflow, thus improving the heat dissipation efficiency of the thermostat 40. The first converging section 53 is connected to the air outlet 12 through the guide section 51. Therefore, the combined effect of the first converging section 53 and the guide section 51 further accelerates the heat dissipation of the thermostat 40, enabling the thermostat 40 to quickly reset or delay its tripping action and effectively improving the heating efficiency of the grill.

[0057] like Figure 1 As shown, more preferably, in this embodiment, the flow-inducing section 51 includes a connecting portion 511 near the thermostat 40 and a noise-reducing portion 512 near the air outlet 12, wherein the cross-sectional area of ​​the noise-reducing portion 512 is larger than that of the connecting portion 511. Optionally, the slope of the noise-reducing portion 512 is greater than that of the connecting portion 511.

[0058] By setting the flow section 51 as a connecting part 511 and a noise reduction part 512, the cross-sectional area of ​​the noise reduction part 512 is enlarged relative to the connecting part 511. As the airflow passes through the connecting part 511 and the noise reduction part 512 and is discharged to the air outlet 12, the airflow becomes buffered due to the increased cross-sectional area of ​​the noise reduction part 512, and the flow rate slows down. This reduces the wind noise caused by the rapid discharge of airflow, reduces working noise, and improves the user experience.

[0059] Of course, it is understood that the present invention is not limited to the above-mentioned type of drainage section 51. In fact, the drainage section 51 can also be a channel of equal diameter. On this basis, the drainage section can also include multiple segments with different slopes.

[0060] Implementation Example 2, such as Figure 2 As shown, the heat dissipation channel 50 includes a mounting section 52 that accommodates the temperature controller 40 and a first converging section 53 with a reduced cross-sectional area relative to the mounting section 52. The difference between this embodiment and embodiment 1 is that the first converging section 53 is directly connected to the air outlet 12.

[0061] In this embodiment, the first converging section 53 may optionally extend horizontally to communicate with the air outlet 12 or extend obliquely upward to communicate with the air outlet 12.

[0062] By setting up the installation section 52 and the first flow-concentrating section 53, the cross-sectional area of ​​the first flow-concentrating section 53 is reduced relative to that of the installation section 52, which can increase the airflow speed and improve the heat dissipation efficiency.

[0063] like Figure 2 As shown, the housing 10 also includes a cooling fan 60 that drives airflow within the heat dissipation channel 50. Optionally, as... Figure 2 As shown, the cooling fan 60 is fixed at the air inlet 11, which is directly opposite the temperature controller 40.

[0064] By installing a cooling fan 60 inside the heat dissipation channel 50, the cooling fan 60 can accelerate the airflow inside the heat dissipation channel 50, allowing cool air to pass through the thermostat 40 more quickly and carry away the heat from the thermostat 40. In addition, the fan can accelerate the exhaust of hot air that has undergone heat exchange with the thermostat 40, reducing the time that hot air stays in the heat dissipation channel 50 and achieving efficient heat dissipation.

[0065] By fixing the cooling fan 60 at the air inlet 11 directly opposite the thermostat 40, cold air is concentrated at the air inlet 11, increasing the airflow into the heat dissipation channel 50, so that the heat of the thermostat 40 is quickly carried away.

[0066] Of course, in other embodiments, the cooling fan 60 may be fixed at the air outlet 12 or disposed inside the heat dissipation channel 50. Furthermore, the cooling fan 60 is not limited to being disposed in the heat dissipation channel provided in this embodiment; it may be combined with heat dissipation channels of other embodiments.

[0067] Implementation Example 3, such as Figure 3 As shown, the heat dissipation channel 50 includes an air inlet section 55 arranged sequentially from the air inlet 11 toward the temperature controller 40, a second flow converging section 54 with a smaller cross-sectional area relative to the air inlet section 55, and an installation section 52 that accommodates the temperature controller 40.

[0068] By providing an air intake section, a second converging section 54, and an installation section 52 for accommodating the thermostat 40 from the air intake 11 towards the thermostat 40, the airflow is accelerated through the second converging section 54 with a reduced cross-sectional area along the flow path from the air intake 11 to the thermostat 40. This increases the speed at which the airflow flows towards the thermostat 40, accelerates the air intake rate, and improves the heat dissipation efficiency of the thermostat 40.

[0069] like Figure 3 As shown, in this embodiment, more preferably, the air inlet section 55 and the second converging section 54 form an air inlet channel; more preferably, the heat dissipation channel 50 also includes the air outlet channel provided in embodiment 1, the air outlet channel includes a first converging section 53 with a reduced cross-sectional area relative to the mounting section 52, and a guide section 51 connecting the first converging section 53 and the air outlet 12, and the mounting section 52 is provided between the air inlet channel and the air outlet channel.

[0070] It should be noted that the present invention does not limit the location of the air inlet 11 and the air outlet 12. For example, in embodiment 1, the air inlet 11 and the temperature controller 40 are vertically aligned, and the heat dissipation channel 50 includes a mounting section 52 that accommodates the temperature controller 40 and extends vertically. One end of the mounting section 52 abuts against the heated surface of the baking pan 20, and the other end connects to the edge of the air inlet 11. Preferably, the air outlet 12 is located on the side wall of the housing 10.

[0071] By aligning the air inlet 11 vertically with the thermostat 40, the distance between the thermostat 40 and the outside cold air is reduced. After entering through the air inlet 11, the cold air directly exchanges heat with the thermostat 40 to dissipate heat, shortening the heat dissipation path, improving heat dissipation efficiency, and accelerating the reset or delaying tripping of the thermostat 40.

[0072] In Example 3, the air inlet 11 and the air outlet 12 are respectively provided on two opposite side walls of the housing 10.

[0073] By placing the air inlet 11 and air outlet 12 on opposite side walls of the housing 10, convection is created, avoiding bends in the airflow path and achieving smooth airflow and efficient heat dissipation. Furthermore, since both the air inlet 11 and air outlet 12 are on the side walls of the housing 10, compared to having them on the bottom wall, it prevents debris and water from entering the housing 10 through the air inlet 11 or air outlet 12, thus protecting the internal electrical components of the housing 10.

[0074] In a preferred embodiment, refer to Figure 1 The housing 10 also has a cooking cavity located on the grilling side. A steam port 13 is provided on the side wall of the housing 10 to connect the cooking cavity with the outside. The steam port 13 and the air outlet 12 are located on the same side of the housing 10, and the steam port 13 is located above the air outlet 12.

[0075] By opening a steam vent 13 on the side wall of the housing 10, moisture from the food inside the cooking cavity can be discharged through the steam vent 13, preventing the food from becoming soggy during frying or grilling and improving the taste and quality of the cooked food. By placing the steam vent 13 and the air outlet 12 on the same side of the housing 10, with the steam vent 13 located above the air outlet 12, the airflow discharged from the air outlet 12 can quickly and disperse the steam discharged from the steam vent 13 upwards, preventing the steam from concentrating at the steam vent 13 and condensing back. Furthermore, the airflow from the steam vent 13 is cooled, preventing scalding of the user and improving safety.

[0076] This utility model does not limit the fixing method of the temperature controller 40. For example, in a preferred embodiment, the grill also includes a mounting cover for the temperature controller 40. The mounting cover fixes the temperature controller 40 in the housing 10 and makes the temperature controller 40 abut against the heated surface of the grill pan 20. The mounting cover has a first connecting port and a second connecting port. The heat dissipation channel 50 includes an air inlet channel connecting the first connecting port and the air inlet 11 and an air outlet channel connecting the second connecting port and the air outlet 12.

[0077] By installing a mounting cover, the thermostat 40 is enclosed and protected, extending its service life, preventing interference from the external environment, and improving its detection sensitivity. Furthermore, the mounting cover secures the thermostat 40 within the housing 10, ensuring contact between the thermostat 40 and the heated surface of the baking tray 20, thus achieving reliable installation and detection. With a first and second connecting port on the mounting cover, the air inlet, mounting cover, and outlet channels work together to concentrate airflow, achieving efficient heat dissipation for the thermostat 40. The mounting cover not only secures the thermostat 40 but also integrates airflow concentration, simplifying the overall structure.

[0078] In addition, this utility model does not limit the type of grill. For example, the grill can be a double-sided grill, that is, the grill shell includes a lower shell and an upper shell, and the grill pan includes a lower grill pan installed in the lower shell and an upper grill pan installed in the upper shell; or, the grill can be a single-sided grill, the shell includes a lower shell and a top cover, and the grill pan is installed in the lower shell.

[0079] Moreover, this utility model does not limit the method of fixing the baking tray to the shell. For example, in a preferred embodiment, the baking tray 20 is fixed inside the shell 10. More preferably, the temperature controller 40 is fixedly installed on the heating surface of the baking tray 20.

[0080] Alternatively, the baking pan 20 is detachable from the housing 10, the heating element 30 includes a heating plate fixed inside the housing 10 and a heating tube fixed to the heating plate, and the thermostat 40 is fixedly installed on the side of the heating plate facing the baking pan 20.

[0081] In some grilling machines, the baking pan 20 is detachable for easy cleaning, while in others, the baking pan 20 is fixedly connected to the housing 10 for user convenience. When the baking pan 20 is fixed inside the housing 10, the thermostat 40 is fixed to the heating surface of the baking pan 20, ensuring a close proximity between the thermostat 40 and the baking pan 20, resulting in sensitive temperature detection and high control accuracy. When the baking pan 20 is detachable from the housing 10, it allows for flexible use and cleaning. Fixing the thermostat 40 to the side of the heating plate facing the baking pan 20 ensures reliable detection while preventing damage from frequent removal and placement of the baking pan 20. It also simplifies the wiring arrangement between the thermostat 40 and the control device inside the housing 10.

[0082] In another preferred embodiment, the heating element 30 includes a heating tube disposed around the center of the baking pan 20, with an opening formed between the two ends of the heating tube, and the thermostat 40 is located at the opening.

[0083] An opening is formed between the two ends of the heating element, which creates a relatively low-temperature zone. The thermostat 40 is placed at the opening, thereby reducing the heat radiation from the heating element to the thermostat 40, reducing the risk of heat damage to the thermostat 40, and enabling the thermostat 40 to quickly reset or delay the switching process, shortening the cooking cycle and improving cooking efficiency.

[0084] This utility model does not limit the circuit connection method of the temperature controller, for example:

[0085] Implementation Example 4, such as Figure 4 As shown, the heating element 30 includes a heating tube 31, a cooling fan 60 connected in series with the heating tube 31, and a thermostat 40 connected in parallel across the cooling fan 60. This allows the cooling fan 60 and the heating tube 31 to work alternately.

[0086] More specifically, such as Figure 4 As shown, one end of switch 90 is connected to the live wire, and the other end is connected to the heating element 31. The other end of switch 90 is also connected to indicator light 80 and a resistor. When switch 90 is closed, indicator light 80 lights up, and heating element 31 operates. By connecting cooling fan 60 in series with heating element 31, and thermostat 40 in parallel across cooling fan 60, with one end of thermostat 40 connected to the fan connected to heating element 31 and the other end connected to the neutral wire, when thermostat 40 trips, due to the series connection between cooling fan 60 and heating element 31, and the relatively low power of cooling fan 60, the current flowing through cooling fan 60 and heating element 31 is small, resulting in minimal heat generation from the heating element, which is close to not operating. When thermostat 40 resets and conducts, it short-circuits cooling fan 60, resulting in a large current flowing through the heating element, and thus a large heat generation from heating element 31. Therefore, it is equivalent to realizing the alternating operation of the cooling fan 60 and the heating tube. This reduces unnecessary power loss of the whole machine caused by the cooling fan 60 working while the heating tube 31 is working, that is, before the temperature controller 40 has tripped and does not need to be reset. It also avoids the situation where the temperature of the baking pan 20 is too high due to the simultaneous operation of the cooling fan 60 and the heating tube 31, which is not conducive to the rapid reset of the temperature controller 40. This achieves the rapid reset effect of the temperature controller and improves heating efficiency.

[0087] Of course, in other embodiments of this invention, without considering the overall power consumption, the cooling fan and heating element can operate simultaneously or continue operating even when the heating element is not in operation. With this configuration, the cooling fan can both delay the thermostat tripping and accelerate the thermostat reset, further improving the heating efficiency of the grill.

[0088] In this embodiment, the fan is a high-voltage fan. Of course, in other embodiments, a low-voltage fan, preferably 5V, can also be used. The main control chip controls the fan according to the heating status of the heating element. Specifically, the zero-crossing circuit of circuit board 70 is connected to the temperature controller. When the temperature controller is disconnected, the zero-crossing is lost, thus recognizing that the machine has stopped heating. At this time, the main control chip controls the cooling fan 60 to work to cool the temperature controller 40. When the zero-crossing signal is detected to be restored, the machine resumes heating, and the cooling fan 60 stops working.

[0089] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0090] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0091] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A grill-broiler comprising a housing, a grill plate mounted in said housing, a heating element located between the grill plate and the housing, said grill plate having a heat receiving surface on the side facing said heating element and a grill surface on the side facing away from the heating element, characterized in that The shell is also provided with a jump type temperature controller and a heat dissipation channel, the temperature sensing end of the temperature controller abuts against the heated surface, and the temperature controller is internally provided with a bimetallic strip which deforms with the change of the temperature of the baking tray, the temperature controller is at least partially located in the heat dissipation channel, and the shell is provided with an air inlet and an air outlet which are in communication with the outside.

2. The combination grill and oven of claim 1 wherein, The air outlet is at least partially higher than the temperature controller, and the heat dissipation channel comprises a flow guiding section which extends from the temperature controller to the air outlet in a downward and upward direction.

3. The combination grill and oven of claim 2 wherein: The heat dissipation channel comprises a mounting section which accommodates the temperature controller and a first flow converging section which is opposite to the mounting section and has a reduced cross-sectional area, and the first flow converging section is in communication with the air outlet through the flow guiding section.

4. The combination grill and oven of claim 2 wherein: The flow guiding section comprises a connecting portion close to the temperature controller and a noise reduction portion close to the air outlet, and the noise reduction portion has an enlarged cross-sectional area relative to the connecting portion.

5. The combination grill and oven of claim 1 wherein, The heat dissipation channel comprises a mounting section which accommodates the temperature controller and a first flow converging section which is opposite to the mounting section and has a reduced cross-sectional area, and the first flow converging section is in communication with the air outlet; Alternatively, the heat dissipation channel comprises, in sequence from the air inlet to the temperature controller, an air inlet section, a second flow converging section which is opposite to the air inlet section and has a reduced cross-sectional area, and a mounting section which accommodates the temperature controller. Alternatively, the air inlet is vertically corresponding to the temperature controller, and the heat dissipation channel comprises a mounting section which accommodates the temperature controller and vertically extends, one end of the mounting section abuts against the heated surface of the baking tray, and the other end abuts against the edge of the air inlet. Alternatively, the air inlet and the air outlet are respectively provided on the opposite two side walls of the shell.

6. The combination grill and oven of claim 1 wherein, The shell is also provided with a heat dissipation fan which drives the airflow in the heat dissipation channel.

7. The combination grill and oven of claim 6 wherein, The heat dissipation fan is fixed at the air inlet which is opposite to the temperature controller.

8. The combination grill and oven of claim 1 or 6 wherein, The shell is also provided with a cooking cavity which is located on one side of the grilling surface, the side wall of the shell is provided with a steam outlet which is in communication with the cooking cavity and the outside, the steam outlet and the air outlet are located on the same side of the shell, and the steam outlet is located above the air outlet.

9. The combination grill and oven of claim 1 wherein, The grilling machine also comprises a mounting cover which surrounds the temperature controller, the mounting cover fixes the temperature controller in the shell and makes the temperature controller abut against the heated surface of the baking tray, the mounting cover is provided with a first communication opening and a second communication opening, the heat dissipation channel comprises an air inlet channel which is in communication with the first communication opening and the air inlet, and an air outlet channel which is in communication with the second communication opening and the air outlet.

10. The combination grill and oven of claim 1 wherein, The baking tray is fixed in the shell, and the temperature controller is fixedly mounted on the heated surface of the baking tray. Alternatively, the baking tray is detachable relative to the shell, the heating element comprises a heating plate which is fixed in the shell and a heating pipe which is fixed to the heating plate, and the temperature controller is fixedly mounted on the side of the heating plate which faces the baking tray. Alternatively, the heating element comprises a heating pipe which is arranged around the center of the baking tray, the two ends of the heating pipe form an opening, and the temperature controller is located at the opening. Alternatively, the heating element comprises a heating pipe, the shell is also provided with a heat dissipation fan which drives the airflow in the heat dissipation channel, the heat dissipation fan is in series with the heating pipe, and the temperature controller is in parallel with the two ends of the heat dissipation fan.

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