Cooking appliance and cooking method for a cooking appliance

Abstract

The application provides a cooking utensil and a cooking method for the cooking utensil, which comprises a pot body, a cover body and a steam generating device. The pot body is provided with an inner pot. The cover body is arranged on the pot body in an openable and closable manner, and a cooking space is formed between the cover body and the inner pot when the cover body is closed on the pot body. The steam generating device comprises a water storage cup, a steam generating box and a steam heating device. The water storage cup is used for containing water. The steam generating box is arranged in the water storage cup, the steam generating box comprises a steam generating cavity, and the steam generating box is provided with a through hole communicating the inside and outside of the steam generating cavity, which allows the water in the water storage cup to enter the steam generating cavity. The cooking utensil according to the application can flexibly control the speed of steam output and quickly spray steam when the cooking space needs steam, so as to improve the cooking efficiency.

Description

Technical Field

[0001] The present invention generally relates to cooking appliances and cooking methods for cooking appliances. Background Technology

[0002] Cooking appliances typically incorporate steam generators to achieve steam recovery or steam humidification. When steam is needed in the cooking space, the steam heating device can be controlled to generate steam to humidify or heat the surface of the rice. However, current cooking appliances often require heating a large amount of water in the steam container when steam is needed, resulting in a relatively long steam output time and a certain lag in steam jetting.

[0003] Therefore, there is a need for a cooking utensil and a cooking method for the cooking utensil to at least partially solve the problems existing in the relevant technology. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a cooking appliance, the cooking appliance comprising:

[0006] A pot body, wherein an inner pot is provided in the pot body;

[0007] A lid, which is closable and mounted on the pot body, wherein when the lid is closed on the pot body, a cooking space is formed between the lid and the inner pot; and

[0008] Steam generating device, the steam generating device comprising:

[0009] A water storage cup, the water storage cup being used to hold water;

[0010] A steam generator is disposed within the water storage cup. The steam generator includes a steam generating chamber and has a through hole communicating with the interior and exterior of the steam generating chamber, allowing water from the water storage cup to enter the steam generating chamber.

[0011] A steam heating device that can heat the water in the steam generating chamber to produce steam.

[0012] According to the cooking appliance of the present invention, by setting a steam generating box in the water storage cup, the water in the water storage cup can enter the steam generating chamber through the through hole set on the steam generating box, so that the steam generating chamber can hold a small amount of water. This solution can quickly heat the water in the steam generating chamber by the steam heating device when steam is needed in the cooking space, so as to quickly spray steam, thereby replenishing water for rice in time, improving the taste of rice, and improving cooking efficiency.

[0013] Optionally, the steam generating device further includes a steam discharge pipe, which is connected to the steam generating box and communicates with the steam generating chamber. This design facilitates the discharge of steam generated in the steam generating chamber through the steam discharge pipe, making exhaust more convenient.

[0014] Optionally, the steam generating device further includes a suspending part connected to the steam discharge pipe, so that the steam generating box can be suspended in water. This design facilitates the entry of water from the storage cup into the steam generating box, and by suspending the steam generating box in water, the position of the steam generating box will change when the water level in the storage cup decreases. By judging this change in position, the water level in the storage cup can be easily monitored to prevent dry burning due to insufficient water.

[0015] Optionally, the steam heating device is configured as an electromagnetic heating coil surrounding the water storage cup, and the steam generating chamber has a metal outer wall, while the water storage cup is made of a non-metallic material. This design facilitates the heating of water in the steam generating chamber located within the water storage cup by the steam heating device.

[0016] Optionally, the position of the electromagnetic heating coil roughly corresponds to the middle water level line of the water storage cup. This design, by placing the electromagnetic heating coil at a position roughly corresponding to the middle water level line of the water storage cup, ensures that when the water level in the cup decreases, the position of the steam generator relative to the electromagnetic heating coil also changes. This allows for convenient monitoring of water level changes in the water storage cup by detecting the distance between the steam generator and the electromagnetic heating coil, thus preventing dry burning due to insufficient water.

[0017] Optionally, the steam generator is further provided with a non-metallic insulation layer that wraps around the metal outer wall. This design prevents heat generated in the steam generator from leaking into the water storage cup and affecting the steam output rate.

[0018] The present invention also provides a cooking method for a cooking utensil as described in any of the preceding claims, comprising:

[0019] The steam heating device is controlled to start heating at a constant power under a constant voltage;

[0020] Detect the heating duty cycle of the steam heating device; and

[0021] Based on the detected heating duty cycle, it is determined whether water needs to be added to the water storage cup.

[0022] Under the premise of constant voltage and power, the farther the heated object is from the steam heating device, the larger the duty cycle for controlling heating will be. This scheme detects the heating duty cycle of the steam heating device and can determine the distance between the steam generator and the steam heating device based on the detected heating duty cycle. When the heating duty cycle is large, it can be inferred that the steam generator is far from the steam heating device, thus indicating that the water level in the storage cup is low and water needs to be added, thereby preventing the storage cup from drying out. This scheme is simple, quick, and highly accurate, and can also eliminate the need for a temperature limiter, reducing costs and assembly steps.

[0023] Optionally, determining whether water needs to be added to the water storage cup based on the detected heating duty cycle includes:

[0024] The detected heating duty cycle is compared with the preset duty cycle, and based on the ratio of the heating duty cycle to the preset duty cycle, it is determined whether water needs to be added to the water storage cup.

[0025] This solution can quickly and easily determine whether the heating duty cycle is exceeded, thus making it easier to determine whether water needs to be added to the storage cup.

[0026] Optionally, the cooking method further includes:

[0027] When the ratio of the heating duty cycle to the preset duty cycle is greater than or equal to a predetermined value, it is determined that water needs to be added to the water storage cup, and the steam heating device is controlled to pause heating.

[0028] When the ratio of the heating duty cycle to the preset duty cycle is less than a predetermined value, it is determined that there is no need to add water to the water storage cup, and the steam heating device is controlled to continue heating.

[0029] This solution can prevent the water storage cup from drying out, thus improving safety.

[0030] The present invention also provides a cooking method for a cooking utensil as described in any of the preceding claims, comprising:

[0031] Control the steam heating device to start heating;

[0032] The number of pulses is counted using a synchronization circuit; and

[0033] The number of pulses determines whether water needs to be added to the water storage cup.

[0034] When the steam generator is within the range of the steam heating device, it absorbs some of the pulse energy during heating, resulting in fewer pulses. Conversely, when the steam generator is far from the heating device, its ability to absorb pulse energy is reduced, leading to more pulses. This solution uses the pulse count to easily determine the distance between the steam generator and the heating device, thus indicating the water level in the storage tank. This allows for timely replenishment of water when the tank is low, preventing dry burning. This solution is simple, quick, and accurate, and it eliminates the need for a temperature limiter, reducing costs and assembly steps. Attached Figure Description

[0035] The following drawings, which illustrate embodiments of the present invention, are included as part of this invention for understanding its principles. The drawings depict embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings,

[0036] Figure 1 A perspective view of a cooking appliance according to a preferred embodiment of the present invention;

[0037] Figure 2 for Figure 1 A schematic diagram of the steam generator of the cooking appliance shown;

[0038] Figure 3 This is a schematic flowchart of a cooking method for a cooking utensil according to a preferred embodiment of the present invention; and

[0039] Figure 4 This is a schematic flowchart of a cooking method for a cooking appliance according to another preferred embodiment of the present invention. Detailed Implementation

[0040] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the invention.

[0041] To fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.

[0042] This invention provides a cooking appliance. The cooking appliance according to this invention can be a rice cooker, electric pressure cooker, or other cooking appliances, and in addition to the function of cooking rice, it can also have various functions such as cooking porridge, making soup, and stir-frying. Preferred embodiments of the invention will be described below with reference to the accompanying drawings.

[0043] refer to Figure 1 The cooking appliance 10 according to the present invention includes a pot body 11 and a lid 12. The pot body 11 may be generally constructed in the shape of a rounded cuboid, and an inner pot is disposed inside it. The inner pot may be configured to be removably disposed in the pot body 11. For example, in one embodiment, a cylindrical inner pot storage part may be provided in the pot body 11, and the inner pot may be freely placed into or removed from the inner pot storage part. The removable configuration allows the user to easily remove the inner pot for cleaning. Of course, in other embodiments, the inner pot may also be fixedly disposed in the pot body 11 in a non-removable manner. The pot body 11 is usually also provided with a heating device for heating the inner pot.

[0044] The lid 12 is mounted on the pot body 11 in an openable and closable manner. Therefore, the lid 12 typically has a shape that conforms to the shape of the pot body 11, allowing for easy closing of the pot body 11. When the lid 12 is opened relative to the pot body 11, the opening of the inner pot in the pot body 11 is exposed, allowing the user to add ingredients to the inner pot or remove cooked food from it. When the lid 12 is closed on the pot body 11, it covers the inner pot and forms a cooking space between them. A sealing element is also provided between the lid 12 and the inner pot to maintain a good seal within the cooking space.

[0045] Combination Figure 2 The cooking appliance 10 according to the present invention is further provided with a steam generating device 13. The steam generating device 13 can be disposed in the lid 12 or the pot body 11, and is used to generate steam to assist cooking. Preferably, the steam generating device 13 is disposed in the lid 12, which can reduce the overall volume of the cooking appliance 10, thereby making the structure of the cooking appliance 10 more compact.

[0046] like Figure 2 As shown, the steam generator 13 includes a water reservoir 131 for holding water. Although not shown in the figure, the steam generator 13 also includes a cover for covering the water reservoir 131 to prevent water in the water reservoir 131 from leaking into the interior of the cooking appliance 10.

[0047] Continue to refer to Figure 2The steam generating device 13 also includes a steam generating chamber 132 and a steam heating device 133. The steam generating chamber 132 is disposed within a water storage cup 131 and is generally polygonal in shape. In the illustrated embodiment, the steam generating chamber 132 is constructed as a cuboid. However, it is understood that in other embodiments not shown, the steam generating chamber 132 may also be constructed as other shapes, such as a cylinder. The steam generating chamber 132 has a steam generating cavity 138 inside, and the steam generating chamber 132 is provided with a through hole 134 connecting the inside and outside of the steam generating cavity 138, allowing water from the water storage cup 131 to enter the steam generating cavity 138 through the through hole 134. Preferably, the steam generating chamber 132 is provided with multiple through holes 134, which are evenly arranged on the sidewalls of the steam generating chamber 132. The steam heating device 133 can heat the small amount of water entering the steam generating cavity 138 through the through hole 134, so that the small amount of water in the steam generating cavity 138 can quickly heat up and boil to generate steam.

[0048] The steam generating device 13 also includes a steam exhaust pipe 135, which is connected to the steam generating chamber 132. Preferably, the steam exhaust pipe 135 is connected to the top wall of the steam generating chamber 132 and communicates with the steam generating chamber 138. The steam generating chamber 138 is connected to the cooking space at least through the steam exhaust pipe 135, so as to introduce steam into the cooking space to assist cooking. Taking a rice cooker as an example, the specific operation of assisting cooking can be that, during the rice cooking process, the steam generated in the steam generating chamber 138 is introduced into the cooking space through the steam exhaust pipe 135 to heat the rice from above, so that the rice can be heated evenly and the heating efficiency can be improved; or, after the rice is cooked, the steam generated in the steam generating chamber 138 is introduced into the cooking space to keep the rice warm and fresh, so as to maintain its good taste.

[0049] Continue to refer to Figure 2 The steam generator also includes a suspension section 136 connected to a steam exhaust pipe 135. Since the steam exhaust pipe 135 is connected to the steam generating tank 132, the suspension section 136 is indirectly connected to the steam generating tank 132, allowing the steam generating tank 132 to be suspended in water by means of the suspension section 136. Exemplarily, the suspension section 136 can be configured as a buoy, allowing the user to observe the position of the steam generating tank 132 in the water storage cup 131 by means of the buoy.

[0050] In a preferred embodiment, the steam heating device 133 is configured as an electromagnetic heating coil, the terminals of which are mounted on an IH power board. This electromagnetic heating coil is arranged around the periphery of the water storage cup 131. To facilitate heating of the steam generating chamber 132 by the steam heating device 133, the steam generating chamber 132 preferably has a metal outer wall, allowing the electromagnetic heating coil to magnetically heat the steam generating chamber 132 inside the water storage cup 131. The metal outer wall can be made of metal materials such as aluminum or steel. To prevent the electromagnetic heating coil from heating the water storage cup 131, the water storage cup 131 can be made of a non-metallic material, such as glass or ceramic. In this way, the steam heating device 133 can heat only the water in the steam generating chamber 132 without heating the water outside the steam generating chamber 132.

[0051] More preferably, the steam generator 132 is further provided with a non-metallic heat insulation layer that wraps around the metal outer wall of the steam generator 132. For example, the non-metal can be ceramic or plastic, and those skilled in the art can select a suitable non-metallic material with good heat insulation performance according to actual needs. This solution can prevent the heat generated in the steam generator 132 from leaking into the water storage cup 131 and affecting the steam output speed from the steam generator 132.

[0052] In a preferred embodiment, the electromagnetic heating coil is fixedly mounted on the water storage cup 131, and the position of the electromagnetic heating coil roughly corresponds to the middle water level line of the water storage cup 131. This design, by fixing the electromagnetic heating coil at a position roughly corresponding to the middle water level line of the water storage cup 131, ensures that the position of the steam generator 132 within the water storage cup 131 is approximately within the range of the electromagnetic heating coil. When the water level in the water storage cup 131 decreases, the position of the steam generator 132 also decreases with the water level, causing a change in the position of the steam generator 132 relative to the electromagnetic heating coil. This allows for convenient monitoring of changes in the water level in the water storage cup 131 by detecting the distance between the steam generator 132 and the electromagnetic heating coil, preventing dry burning due to insufficient water. This detection process will be described in detail below.

[0053] It is understandable that when the water storage cup 131 is filled with water, the water will enter the steam generator 132 through the through hole 134. Due to the function of the suspension part 136, the steam generator 132 will be suspended in the water in the water storage cup 131, and the position of the steam generator 132 can be within the range of the electromagnetic heating coil.

[0054] Typically, in an electromagnetic heating system, if the heated object's position within the electromagnetic heating coil is fixed, to maintain a constant power, the duty cycle of the MCU controlling the power transistor's conduction current is also fixed. The "duty cycle" mentioned in this article refers to the ratio of heating time to the off-heating time. A larger duty cycle results in a relatively longer heating time and a relatively shorter off-heating time; conversely, a smaller duty cycle results in a relatively shorter heating time and a relatively longer off-heating time. Under the premise of constant voltage and power, the farther the heated object is from the heating device, the larger the MCU's heating duty cycle will be. Therefore, under the premise of constant voltage and power, by detecting the heating duty cycle of the steam heating device 133, the distance between the steam generating box 132 and the steam heating device 133 can be determined. When the heating duty cycle is large, it can be inferred that the steam generating box 132 is far from the steam heating device 133, thus indicating that the water level in the water storage cup 131 is low and needs to be increased. This solution provides a simple and quick way to determine the water level in the storage cup with high accuracy, and it eliminates the need for other water level detection devices, thus reducing costs.

[0055] The following will refer to Figure 3 A cooking method for a cooking appliance 10 according to a preferred embodiment of the present invention will be described in detail below. It should be noted that the implementing apparatus involved in the method steps below has already been described in detail above, and for the sake of brevity, it will not be repeated below.

[0056] Specifically, after cooking begins, when steam is needed, the MCU of the cooking appliance first initiates a pot-judging program to determine if there is water in the water storage cup 131. Specifically, the MCU determines the presence of water in the water storage cup 131 by detecting whether the heating duty cycle of the steam heating device 133 is abnormal. Specifically, the MCU can compare the detected heating duty cycle with a preset duty cycle and determine whether water needs to be added to the water storage cup 131 based on the ratio of the heating duty cycle to the preset duty cycle. Further, when the ratio of the heating duty cycle to the preset duty cycle is greater than or equal to a predetermined value, it is determined that there is no water or insufficient water in the water storage cup 131, and water needs to be added to the water storage cup 131. The steam heating device 133 is then controlled to pause heating, and sufficient water can be added to the water storage cup 131. Conversely, when the ratio of the heating duty cycle to the preset duty cycle is less than a predetermined value, it is determined that water does not need to be added to the water storage cup 131, and the steam heating device 133 continues heating.

[0057] Preferably, the preset duty cycle can be pre-stored in the MCU. For example, the value of the preset duty cycle can be obtained by recording the duty cycle of the electromagnetic heating coil heating the steam generator 132 under different voltages when there is no water in the water storage cup 131. Typically, when the actual heating duty cycle reaches more than 80% of the preset duty cycle, it can be considered that the water level in the water storage cup 131 is insufficient. At this time, the steam heating device 133 can be controlled to pause heating and remind the user to add water to the water storage cup 131.

[0058] After water is added to the water storage cup 131, the MCU restarts the pot detection program to determine whether water has been added to the water storage cup 131. After the MCU detects that the heating duty cycle is normal, the MCU controls the steam heating device 133 to start heating the steam generator 132, causing the small amount of water inside to boil and generate steam. The steam is discharged to the designated place through the steam discharge pipe 135.

[0059] Preferably, during the actual heating process of the steam heating device 133, the MCU can execute a pot-judging program every certain period of time to prevent the water storage cup 131 from dry-burning. Preferably, the MCU can execute a judgment every 2 seconds to 20 seconds. During the actual heating process, when the water in the water storage cup 131 decreases, the suspended part 136 also begins to descend, causing the steam generator 132 to slowly move away from the electromagnetic heating coil. When the water level in the water storage cup 131 drops to a certain level, the steam generator 132 also moves away from the electromagnetic heating coil to a certain extent. At this time, the duty cycle of the MCU controlling the power transistor to conduct heating will correspondingly increase. When the actual heating duty cycle reaches more than 80% of the preset duty cycle, it is judged that there is no water or insufficient water in the water storage cup 131, and water needs to be added to the water storage cup 131. The steam heating device 133 is then controlled to pause heating, and sufficient water can be added to the water storage cup 131 at this time.

[0060] The following will refer to Figure 4 A cooking method for a cooking appliance 10 according to another preferred embodiment of the present invention will be described in detail below. It should be noted that the implementing apparatus involved in the method steps below has already been described in detail above, and for the sake of brevity, it will not be repeated below.

[0061] Specifically, similar to the method described above, when steam is needed during cooking, the MCU first initiates a pot detection program to determine if there is water in the water storage cup 131. Specifically, the MCU can determine the presence of water in the water storage cup 131 by detecting the number of pulses; that is, it energizes the electromagnetic heating coil for a predetermined time, which can be 4µs to 15µs, and then counts the number of pulses using a synchronization circuit. When the steam generator 132 is within the range of the electromagnetic heating coil, it can absorb the pulse energy, so the number of pulses is usually 0 to 1; while when the steam generator 132 is far from the electromagnetic heating coil, its ability to absorb pulse energy is poor, so the number of pulses is usually 2 to 6. Therefore, when the number of pulses is greater than or equal to 2, it can be considered that the steam generator 132 is far from the electromagnetic heating coil, and there is no water or insufficient water in the water storage cup 131. Water needs to be added to the water storage cup 131, and the steam heating device 133 is controlled to pause heating. At this time, sufficient water can be added to the water storage cup 131. When the number of pulses is less than 2, it is determined that there is no need to add water to the water storage cup 131, and the steam heating device 133 is controlled to continue heating.

[0062] After water is added to the water storage cup 131, the MCU restarts the pot detection program to determine whether water has been added to the water storage cup 131. After the MCU detects that there is no abnormality in the pulse count, the MCU controls the steam heating device 133 to start heating the steam generating box 132, causing the small amount of water inside to boil and generate steam. The steam is discharged to the designated place through the steam discharge pipe 135.

[0063] Preferably, during the actual heating process of the steam heating device 133, the MCU can execute a pot-judging program every certain period of time to prevent the water storage cup 131 from dry-burning. Preferably, the MCU can execute a judgment every 2 seconds to 20 seconds. During the actual heating process, when the water in the water storage cup 131 decreases, the suspended part 136 also begins to descend, causing the steam generator 132 to slowly move away from the electromagnetic heating coil. When the water level in the water storage cup 131 drops to a certain level, the steam generator 132 also moves away from the electromagnetic heating coil to a certain extent. At this time, the number of pulses is generally large. When the number of pulses is greater than or equal to 2, it is determined that there is no water or insufficient water in the water storage cup 131, and water needs to be added to the water storage cup 131. The steam heating device 133 is then controlled to pause heating, and sufficient water can be added to the water storage cup 131 at this time.

[0064] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0065] The present invention has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the present invention to the described embodiments. Those skilled in the art will understand that many variations and modifications can be made based on the teachings of the present invention, and all such variations and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A cooking utensil, characterized in that, The cooking appliance (10) includes: The pot body (11) is provided with an inner pot; A lid (12), which is closable and mounted on the pot body, wherein when the lid is closed on the pot body, a cooking space is formed between the lid and the inner pot; and Steam generating device (13), wherein the steam generating device is disposed in the pot body or the lid body, the steam generating device comprising: A water storage cup (131) for holding water; A steam generator (132) is disposed in the water storage cup. The steam generator includes a steam generating chamber (138), and the steam generator is provided with a through hole (134) connecting the inside and outside of the steam generating chamber (138). The through hole allows water from the water storage cup to enter the steam generating chamber. A steam heating device (133) is configured as an electromagnetic heating coil arranged around the water storage cup, which can heat the water in the steam generating chamber (138) to generate steam; A steam exhaust pipe (135) is connected to the steam generator (132); A suspension part (136) is connected to the steam exhaust pipe (135) so that the steam generating box (132) can be suspended in water, and the position of the steam generating box changes relative to the electromagnetic heating coil as the amount of water in the water storage cup decreases.

2. The cooking utensil according to claim 1, characterized in that, The steam discharge pipe is connected to the steam generating chamber (138).

3. The cooking utensil according to claim 1, characterized in that, The steam generator (132) has a metal outer wall, and the water storage cup is made of non-metallic material.

4. The cooking utensil according to claim 3, characterized in that, The position of the electromagnetic heating coil roughly corresponds to the middle water level line of the water storage cup.

5. The cooking utensil according to claim 3, characterized in that, The steam generator is also equipped with a non-metallic insulation layer that wraps around the metal outer wall.

6. A cooking method for a cooking appliance as described in any one of claims 1-5, characterized in that, include: The steam heating device is controlled to start heating at a constant power under a constant voltage; The heating duty cycle of the steam heating device is detected; as well as Based on the detected heating duty cycle, the distance between the steam generator and the steam heating device is determined to determine whether water needs to be added to the water storage cup.

7. The cooking method according to claim 6, characterized in that, The step of determining whether water needs to be added to the water storage cup based on the detected heating duty cycle includes: The detected heating duty cycle is compared with the preset duty cycle, and based on the ratio of the heating duty cycle to the preset duty cycle, it is determined whether water needs to be added to the water storage cup.

8. The cooking method according to claim 7, characterized in that, Also includes: When the ratio of the heating duty cycle to the preset duty cycle is greater than or equal to a predetermined value, it is determined that water needs to be added to the water storage cup, and the steam heating device is controlled to pause heating. When the ratio of the heating duty cycle to the preset duty cycle is less than a predetermined value, it is determined that there is no need to add water to the water storage cup, and the steam heating device is controlled to continue heating.

9. A cooking method for a cooking utensil as described in any one of claims 1-5, characterized in that, include: Control the steam heating device to start heating; The number of pulses is counted using a synchronization circuit; as well as The distance between the steam generator and the steam heating device is determined based on the number of pulses to determine whether water needs to be added to the water storage cup.

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