Steam generating system for cooking appliance, cooking appliance and control method thereof

Abstract

The present invention relates to a steam generating system for a cooking appliance, a cooking appliance and a control method thereof. The steam generating system comprises: a water tank, a steam generator, a control valve and a low-pressure anti-scaling device; a water passage is provided between the water outlet of the water tank and the water inlet of the steam generator, and the control valve is used to control the opening and closing of the water passage; the low-pressure anti-scaling device comprises: a first conductive part, a second conductive part and an anode and a cathode both arranged in the water tank, and the first conductive part and the second conductive part are used to energize the anode and the cathode respectively, so as to form an anti-scaling electric field between the anode and the cathode. The steam generating system can greatly reduce the concentration of metal ions in water, thereby greatly reducing the amount of water scaling in the steam generator, improving the thermal efficiency of the steam generator, and also avoiding the problems of environmental pollution and high labor intensity of users caused by the use of descaling agents.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a steam generating system for a cooking appliance, the cooking appliance and a control method thereof. Background Art

[0002] Steam cooking appliances currently on the market, such as steam boxes, steam ovens, microwave ovens and other cooking appliances, will inevitably produce scale on the inner surface of their steam generators after using the steam function for a period of time. Once scale is formed, it will increase thermal resistance, reduce thermal efficiency, increase energy consumption, and in severe cases, it will directly block the water channel and affect the normal operation of the entire machine. At present, in order to solve this technical problem, the steam generator is usually cleaned regularly with a descaling agent, which not only pollutes the environment, but also increases the user's labor intensity and reduces the user experience. Summary of the invention

[0003] Based on this, the present invention aims to solve the above-mentioned problems and provides a steam generating system for cooking appliances, cooking appliances and control methods thereof, which can greatly reduce the amount of water scaling in the steam generator and avoid problems such as environmental pollution and high labor intensity for users caused by the use of descaling agents.

[0004] A steam generating system for a cooking appliance, characterized in that the steam generating system comprises: a water tank, a steam generator, a control valve and a low-pressure anti-scaling device;

[0005] A water passage is provided between the water outlet of the water tank and the water inlet of the steam generator, and the control valve is used to control the opening and closing of the water passage;

[0006] The low-voltage anti-scaling device includes: a first conductive part, a second conductive part, and an anode and a cathode both arranged in the water tank. The first conductive part and the second conductive part are respectively used to energize the anode and the cathode to form an anti-scaling electric field between the anode and the cathode.

[0007] In one embodiment, the first conductive part and the second conductive part both include: a conductive pin for conductively connecting to an external power source, the conductive pin being located outside the water tank;

[0008] A conductive frame is arranged outside the water tank, the conductive frame is in conductive contact with the conductive needle, and the conductive frame is conductively connected to the anode or the cathode.

[0009] In one embodiment, a mounting portion is provided at the water outlet of the water tank, the first end of the conductive needle is connected to the mounting portion, and the second end of the conductive needle is in conductive contact with the conductive frame, wherein the first end and the second end of the conductive needle are relatively distributed.

[0010] In one of the embodiments, a clamping cavity is provided on the conductive frame, and the clamping cavity is used to clamp the conductive needle.

[0011] In one embodiment, the conductive frame is formed by bending a conductive plate, and a gap is provided between the head and the tail of the conductive plate, and the gap constitutes the clamping cavity.

[0012] In one of the embodiments, the head and tail of the conductive plate are bent toward each other.

[0013] In one of the embodiments, a receiving groove is provided on the outer wall of the water tank, and the conductive frame is placed in the receiving groove.

[0014] In one of the embodiments, the low-pressure anti-scaling device further comprises a connecting piece, which is connected to the anode and / or the cathode and presses the conductive frame against the outer wall of the water tank.

[0015] In one embodiment, the steam generation system further includes: a magnetizer, and the magnetizer is used to magnetize the water in the water channel.

[0016] In one of the embodiments, the steam generation system further comprises: a control module conductively connected to the first conductive part, the second conductive part, the control valve and the magnetizer;

[0017] The control module is used to close the control valve and the magnetizer and energize the first conductive part and the second conductive part, and after a preset energization period, open the control valve and the magnetizer and stop energizing the first conductive part and the second conductive part.

[0018] In one embodiment, the steam generation system further includes: a liquid level sensor and a control module conductively connected to the liquid level sensor, the steam generator, and the control valve;

[0019] The liquid level sensor is used to obtain and send to the control module a first water level of the steam generator before the cooking appliance cooks;

[0020] The control module is used for closing the control valve and opening the steam generator when the first water level reaches a first preset water level.

[0021] In one of the embodiments, the liquid level sensor is further used to obtain and send to the control module a second water level of the steam generator during the cooking process of the cooking appliance;

[0022] The control module is further configured to determine whether the second water level reaches a second preset water level, and if not, to open the control valve and close the steam generator.

[0023] In one embodiment, the steam generating system further comprises: a motor installed at the water outlet of the steam generator and a control module conductively connected to the steam generator and the motor;

[0024] The control module is used to drive the motor to discharge the remaining water in the steam generator after the cooking appliance finishes cooking.

[0025] A cooking appliance comprises the steam generating system described in any one of the above items.

[0026] A control method for a cooking appliance, the control method comprising:

[0027] closing a control valve of a steam generating system, and applying power to a first conductive part and a second conductive part of the steam generating system to form an anti-scaling electric field between an anode and a cathode of the steam generating system;

[0028] After the power is turned on for a preset time, the power supply to the first conductive part and the second conductive part is stopped, and the control valve is opened to transport the water in the water tank of the steam generating system to the steam generator of the steam generating system.

[0029] In one embodiment, the steam generation system further comprises: a magnetizer, the magnetizer being used to magnetize the water before it flows into the steam generator;

[0030] Before power is supplied to the first conductive part and the second conductive part, the control method further includes turning off the magnetizer, and after power is supplied to the first conductive part and the second conductive part for the preset time period, the control method further includes turning on the magnetizer.

[0031] In one embodiment, the control method further includes:

[0032] obtaining a first water level of the steam generator before cooking in the cooking appliance;

[0033] When the first water level reaches a first preset water level, the control valve is closed and the steam generator is opened.

[0034] In one embodiment, the control method further includes:

[0035] Step a, during the cooking process of the cooking utensil, obtaining a second water level in the steam generator;

[0036] Step b: determine whether the second water level reaches a second preset water level; if not, open the control valve and close the steam generator.

[0037] In one embodiment, step b further includes: if the second water level reaches the second preset water level, closing the control valve and opening the steam generator;

[0038] After step b, the control method further includes: judging whether the cooking appliance has completed cooking, and if so, turning off the steam generator and draining the water in the steam generator; otherwise, executing step a.

[0039] In the steam generating system for cooking utensils, cooking utensils and control methods thereof, the first conductive part of the low-voltage anti-scaling device can be energized to the anode and the second conductive part can be energized to the cathode, and then the potential difference between the anode and the cathode can be used to generate an anti-scaling electric field in the water tank, so that the Ca in the water is 2+ Mg 2+ Metal ions such as aluminum ions gather on the surface of the cathode, which can greatly reduce the concentration of metal ions in the water, thereby greatly reducing the amount of water scaling in the steam generator, improving the thermal efficiency of the steam generator, and avoiding environmental pollution caused by the use of descaling agents, high labor intensity for users, and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic structural diagram of a steam generating system for a cooking appliance provided in one embodiment of the present invention;

[0041] Figure 2 A longitudinal cross-sectional view of a water tank provided in one embodiment of the present invention;

[0042] Figure 3 for Figure 2 A local enlarged schematic diagram at point A;

[0043] Figure 4 for Figure 2 A local enlarged schematic diagram at B;

[0044] Figure 5 A schematic diagram of the structure of a conductive frame provided by an embodiment of the present invention;

[0045] Figure 6 This is an operational logic block diagram of a steam generating system for a cooking appliance provided by an embodiment of the present invention.

[0046] The reference numerals in the accompanying drawings are described as follows:

[0047] 100, water tank; 200, steam generator; 300, control valve; 410, first conductive part; 420, second conductive part; 430, anode; 440, cathode; 400a, conductive frame; 400b, conductive needle; 400c, clamping cavity; 450, mounting part; 460, connector; 500, magnetizer; 600, liquid level sensor; 700, motor; 800, water pump; 900, control module. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0054] See also Figure 1 , Figure 1 The schematic diagram of the structure of a steam generating system for a cooking appliance in one embodiment of the present invention is shown. The steam generating system for a cooking appliance provided in one embodiment of the present invention comprises a water tank 100, a steam generator 200 and a low-pressure anti-scaling device. Figure 1 As shown, there is a water passage between the water outlet of the water tank 100 and the water inlet of the steam generator 200, and the control valve 300 is used to control the opening and closing of the water passage. Figures 2 to 4 As shown, the low-pressure anti-scaling device includes: a first conductive part 410, a second conductive part 420, and an anode 430 and a cathode 440 both arranged in the water tank 100. The first conductive part 410 and the second conductive part 420 are respectively used to energize the anode 430 and the cathode 440 to form an anti-scaling electric field between the anode 430 and the cathode 440.

[0055] As an example, the cooking appliance may be a steamer, a steam oven, a microwave oven, or the like.

[0056] As an example, Figure 1 As shown, the steam generation system further includes a water pump 800 disposed at the water passage, and the water pump 800 is used to pump water in the water tank 100 to the steam generator 200. The water passage can be formed by two water pipelines, one of which is connected between the water outlet of the water tank 100 and the water inlet of the water pump 800, and the other is connected between the water outlet of the water pump 800 and the water inlet of the steam generator 200. It is understandable that the water tank 100 is also provided with a water inlet.

[0057] In the steam generating system for cooking utensils as described above, the first conductive part 410 of the low-pressure anti-scaling device can be energized to the anode 430 and the second conductive part 420 can be energized to the cathode 440, and then the potential difference between the anode 430 and the cathode 440 can be used to generate an anti-scaling electric field in the water tank 100, so that the Ca in the water 2+ Mg 2+ Metal ions such as aluminum ions are gathered on the surface of cathode 440, which can greatly reduce the concentration of metal ions in water, thereby greatly reducing the amount of water scaling in steam generator 200, improving the thermal efficiency of steam generator 200, and avoiding environmental pollution caused by the use of descaling agents, high labor intensity for users, and other problems.

[0058] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the first conductive part 410 and the second conductive part 420 both include: a conductive needle 400b for conductively connecting to an external power source, the conductive needle 400b is located outside the water tank 100; a conductive frame 400a disposed outside the water tank 100, the conductive frame 400a is in conductive contact with the conductive needle 400b, and the conductive frame 400a is conductively connected to the anode 430 or the cathode 440. Of course, in some other embodiments of the present invention, the first conductive part 410 and the second conductive part 420 may also be a metal screw barrel, the middle part of the metal screw barrel is connected to the wall of the water tank 100, one end of the metal sleeve is conductively connected to the external power source, and the other end of the metal sleeve is threadedly connected to the anode 430 or the cathode 440.

[0059] Furthermore, if Figures 2 to 4 As shown, in some embodiments of the present invention, a mounting portion 450 is provided at the water outlet of the water tank 100, the first end of the conductive pin 400b is connected to the mounting portion 450, and the second end of the conductive pin 400b is in conductive contact with the conductive frame 400a, wherein the first end and the second end of the conductive pin 400b are relatively distributed. Of course, in some other embodiments of the present invention, the conductive pin 400b can also be directly fixedly connected to the conductive frame 400a, for example, by welding or threading.

[0060] Optionally, the mounting portion 450 is Figure 2 The mounting portion 450 can fix the first end of the conductive pin 400b by a fastener (such as a nut). Figure 3 and Figure 4 The first end of the conductive pin 400b shown is connected to two nuts at intervals in a threaded manner, and the two nuts cooperate to clamp the mounting portion 450 to the first end of the conductive pin 400b. The nut farthest from the water tank 100 can press the wire connected to the external power supply to the outer wall of the first end of the conductive pin 400b.

[0061] Furthermore, if Figure 5 As shown, in some embodiments of the present invention, a clamping cavity 400c is provided on the conductive frame 400a, wherein Figure 3 and Figure 4 As shown, the clamping cavity 400c is used to clamp the conductive pin 400b. The clamping cavity 400c can clamp the conductive pin 400b to ensure effective conductive contact between the conductive frame 400a and the conductive pin 400b, and avoid poor contact between the two. It can be understood that the width of the clamping cavity 400c is slightly smaller than the outer diameter of the conductive pin 400b.

[0062] Specifically in some embodiments of the present invention, Figure 5 As shown in FIG. 4 , the conductive frame 400a is formed by bending a conductive plate, and there is a gap between the head and the tail of the conductive plate, and the gap constitutes a clamping cavity 400c. In this way, the processing of the conductive frame 400a is facilitated. Optionally, the conductive plate is bent into a substantially Figure 5 The rectangular structure shown.

[0063] Among them, Figure 5 As shown, the head and tail of the conductive plate are bent toward each other. The bent head and tail of the conductive plate can prevent the conductive pins 400b from being scratched when the conductive frame 400a and the conductive pins 400b are assembled.

[0064] In some embodiments of the present invention, a receiving groove is provided on the outer wall of the water tank 100, and the conductive frame 400a is placed in the receiving groove. In this way, the conductive frame 400a can be prevented from protruding from the outside of the water tank 100, thereby protecting the conductive frame 400a. It can be understood that the number of receiving grooves is the same as the number and installation position of the conductive frame 400a. For example, Figure 2 The steam generation system shown includes two conductive frames 400a distributed along the two sides of the water tank 100, and a receiving groove is also provided on each side of the water tank 100. In addition, the shape of the receiving groove is adapted to the structure of the conductive frame 400a. For example, Figure 3 The conductive frame 400a shown in the figure is generally a rectangular parallelepiped structure, and the receiving groove is configured as follows: Figure 2 The rectangular slot structure shown.

[0065] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the low-pressure anti-scaling device also includes a connector 460, which is connected to the anode 430 and / or the cathode 440 and presses the conductive frame 400a against the outer wall of the water tank 100. The specific connection method between the connector 460 and the anode 430 or the cathode 440 is related to the structure of the anode 430 or the cathode 440. For example, Figure 3The anode 430 shown is a rod-shaped structure, and one end of the connector 460 is threadedly connected to the anode 430, and the other end of the connector 460 passes through the corresponding conductive frame 400a and is threadedly connected to the nut. Figure 4 The cathode 440 shown is a sheet structure, and an ear plate is provided on the cathode 440. The head of the connector 460 presses the ear plate against the inner wall of the water tank 100, and the tail of the connector 460 passes through the corresponding conductive frame 400a and is threadedly connected to the nut. It should be noted that by providing the cathode 440 with a sheet structure, the outer surface area of ​​the cathode 440 can be increased, and the replacement frequency of the cathode 440 can be reduced.

[0066] like Figure 1 As shown, in some embodiments of the present invention, the steam generation system further includes: a magnetizer 500, which is used to magnetize the water in the water channel. The magnetic lines of force generated by the magnetizer 500 can break the water molecules in the water channel into single or smaller associated water molecules, resulting in changes in their conductivity, solubility, osmotic pressure, surface tension and pH index, so that Ca 2+ Mg 2+ Metal ions such as CaCO3 and MgCO3 form loose components, even if the Ca in water 2+ Mg 2+ The scale formed by the metal ions in the steam generator 200 is also aragonite scale with a loose structure that is easy to flow out with the water flow, rather than calcite scale which is the most thermodynamically stable.

[0067] Alternatively, if Figure 1 As shown, the magnetizer 500 is an excitation coil arranged around the water passage. The excitation coil can be arranged around the water pipeline between the water outlet of the water pump 800 and the water inlet of the steam generator 200.

[0068] Furthermore, if Figure 1 As shown, in some embodiments of the present invention, the steam generation system further includes: a control module 900 conductively connected to the first conductive part 410, the second conductive part 420, the control valve 300 and the magnetizer 500; the control module 900 is used to close the control valve 300, the magnetizer 500 and energize the first conductive part 410 and the second conductive part 420, and after the power is turned on for a preset time, the control valve 300, the magnetizer 500 are opened and the power is stopped to the first conductive part 410 and the second conductive part 420. The control module 900 is used to improve the automation of the steam generation system and improve the user experience. When cooking, the low-pressure anti-scaling device can be pre-opened for a preset time.

[0069] Optionally, the control valve 300 may be a solenoid valve or an electric valve. The control module 900 is a PLC (Programmable Logic Controller).

[0070] Alternatively, if Figure 1 As shown, the control module 900 is also electrically connected to the water pump 800 to control the on and off of the water pump 800. The working mode of the water pump 800 is synchronized with the working modes of the control valve 300 and the magnetizer 500.

[0071] like Figure 1 As shown, in some embodiments of the present invention, the steam generation system further includes: a liquid level sensor 600 and a control module 900 conductively connected to the liquid level sensor 600, the steam generator 200, and the control valve 300; the liquid level sensor 600 is used to obtain and send the first water level of the steam generator 200 to the control module 900 before the cooking appliance cooks; the control module 900 is used to close the control valve 300 and open the steam generator 200 when the first water level reaches the first preset water level. Excessive water in the steam generator 200 can be avoided to ensure the normal operation of the steam generator 200.

[0072] Furthermore, in some embodiments of the present invention, the liquid level sensor 600 is also used to obtain and send the second water level of the steam generator 200 to the control module 900 during the cooking process of the cooking appliance; the control module 900 is also used to determine whether the second water level reaches the second preset water level, and if not, open the control valve 300 and close the steam generator 200. In this way, it can be avoided that the steam generator 200 cannot work normally due to too little water. It can be understood that the second preset water level is less than the first preset water level.

[0073] like Figure 1 As shown, in some embodiments of the present invention, the steam generating system further includes: a motor 700 installed at the water outlet of the steam generator 200 and a control module 900 conductively connected to the steam generator 200 and the motor 700; the control module 900 is used to drive the motor 700 to drain the remaining water in the steam generator 200 after the cooking of the cooking appliance is finished.

[0074] Optionally, the motor 700 is a wax top motor.

[0075] Combine the following Figure 6 The working process of the steam generation system as described above is described below:

[0076] When the steam generating system is in operation, the wax top motor 700 remains in a closed state, the low-pressure anti-scaling device in the water tank 100 is opened in advance for a period of time, and then the control valve 300 and the magnetizer 500 are connected, and the water pump 800 starts to replenish magnetized water to the steam generator 200. When the control module 900 on the steam generator 200 detects that the water level is in place through the liquid level sensor 600, the control valve 300, the magnetizer 500, and the water pump 800 are closed, and the steam generator 200 starts to work, generating steam to heat the heating area of ​​the cooking utensil. As long as cooking is not completed, the liquid level sensor 600 will continue to operate. When the control module 900 detects that the steam generator 200 is short of water, the control valve 300, the magnetizer 500, and the water pump 800 are opened again to replenish water. When cooking is finished, the steam generator 200 stops working, and the wax top motor 700 is opened to discharge the remaining water in the steam generator 200.

[0077] Another embodiment of the present invention provides a cooking utensil, which includes: the steam generating system described above.

[0078] In the cooking appliance described above, the first conductive part 410 of the low-voltage anti-scaling device can energize the anode 430 and the second conductive part 420 can energize the cathode 440, and then the potential difference between the anode 430 and the cathode 440 can be used to generate an anti-scaling electric field in the water tank 100, so that the Ca in the water 2+ Mg 2+ Metal ions such as aluminum ions are gathered on the surface of cathode 440, which can greatly reduce the concentration of metal ions in water, thereby greatly reducing the amount of water scaling in steam generator 200, improving the thermal efficiency of steam generator 200, and avoiding environmental pollution caused by the use of descaling agents, high labor intensity for users, and other problems.

[0079] Another embodiment of the present invention provides a control method for a cooking appliance, the control method comprising:

[0080] Step S100, closing the control valve 300 of the steam generating system, and energizing the first conductive part 410 and the second conductive part 420 of the steam generating system to form an anti-scaling electric field between the anode 430 and the cathode 440 of the steam generating system;

[0081] Step S200 , after the power is turned on for a preset time, the power supply to the first conductive part 410 and the second conductive part 420 is stopped, and the control valve 300 is opened to transport the water in the water tank 100 of the steam generation system to the steam generator 200 .

[0082] In the control method of the cooking appliance as described above, the first conductive part 410 of the low-voltage anti-scaling device can energize the anode 430 and the second conductive part 420 can energize the cathode 440, and then the potential difference between the anode 430 and the cathode 440 can be used to generate an anti-scaling electric field in the water tank 100, so that the Ca in the water 2+ Mg 2+ Metal ions such as aluminum ions are gathered on the surface of cathode 440, which can greatly reduce the concentration of metal ions in water, thereby greatly reducing the amount of water scaling in steam generator 200, improving the thermal efficiency of steam generator 200, and avoiding environmental pollution caused by the use of descaling agents, high labor intensity for users, and other problems.

[0083] In some embodiments of the present invention, the steam generation system further includes: a magnetizer 500, which is used to magnetize the water before it flows into the steam generator 200; before the first conductive part 410 and the second conductive part 420 are powered on, the control method further includes turning off the magnetizer 500, and after the first conductive part 410 and the second conductive part 420 are powered on for a preset time, the control method further includes: turning on the magnetizer 500. The magnetic lines of force generated by the magnetizer 500 can break the water molecules in the water channel into single or smaller associated water molecules, resulting in changes in their conductivity, solubility, osmotic pressure, surface tension and pH index, so that Ca 2+ Mg 2+ Metal ions such as CaCO3 and MgCO3 form loose components, even if the Ca in water 2+ Mg 2+ The scale formed by the metal ions in the steam generator 200 is also aragonite scale with a loose structure that is easy to flow out with the water flow, rather than calcite scale which is the most thermodynamically stable.

[0084] In some embodiments of the present invention, the control method further includes:

[0085] Step S300, obtaining a first water level of the steam generator 200 before the cooking appliance is used for cooking;

[0086] Step S400: When the first water level reaches a first preset water level, the control valve 300 is closed and the steam generator 200 is opened.

[0087] In this way, excessive water in the steam generator 200 can be avoided, thereby ensuring the normal operation of the steam generator 200.

[0088] In some embodiments of the present invention, the control method further includes:

[0089] Step a: during the cooking process of the cooking utensil, obtaining a second water level in the steam generator 200;

[0090] Step b: determining whether the second water level reaches the second preset water level; if not, the control valve 300 closes the steam generator 200.

[0091] In this way, it can be avoided that the steam generator 200 cannot work normally due to too little water. It can be understood that the second preset water level is lower than the first preset water level.

[0092] Furthermore, in some embodiments of the present invention, step b also includes: if the second water level reaches the second preset water level, closing the control valve 300 and opening the steam generator 200; after step b, the control method also includes: determining whether the cooking appliance has completed cooking, if completed, closing the steam generator 200 and draining the water in the steam generator 200; otherwise, executing step a.

[0093] Another embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the control methods described above are implemented.

[0094] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A steam generating system for a cooking appliance, characterized in that: The steam generation system comprises: a water tank, a steam generator, a control valve and a low-pressure anti-scaling device; A water passage is provided between the water outlet of the water tank and the water inlet of the steam generator, and the control valve is used to control the opening and closing of the water passage; The low-voltage anti-scaling device comprises: a first conductive part, a second conductive part, and an anode and a cathode both arranged in the water tank, wherein the first conductive part and the second conductive part are used to energize the anode and the cathode respectively, so as to form an anti-scaling electric field between the anode and the cathode; The first conductive part and the second conductive part each include: a conductive needle for conductively connecting to an external power source, the conductive needle being located outside the water tank; a conductive frame arranged outside the water tank, the conductive frame being in conductive contact with the conductive needle, and the conductive frame being conductively connected to the anode or the cathode; The conductive frame is formed by bending a conductive plate. A gap is provided between the head and the tail of the conductive plate. The gap constitutes a clamping cavity, and the clamping cavity is used to clamp the conductive needle.

2. The steam generating system according to claim 1, characterized in that: A mounting portion is provided at the water outlet of the water tank, the first end of the conductive needle is connected to the mounting portion, and the second end of the conductive needle is in conductive contact with the conductive frame, wherein the first end and the second end of the conductive needle are relatively distributed.

3. The steam generating system according to claim 1, characterized in that: The head and tail of the conductive plate are bent toward each other.

4. The steam generating system according to claim 1, characterized in that: An accommodating groove is arranged on the outer wall of the water tank, and the conductive frame is placed in the accommodating groove.

5. The steam generating system according to claim 1, characterized in that: The low-pressure anti-scaling device also includes a connecting piece, which is connected to the anode and / or the cathode and presses the conductive frame against the outer wall of the water tank.

6. The steam generating system according to any one of claims 1 to 5, characterized in that: The steam generation system further comprises: a magnetizer, which is used to magnetize the water in the water passage.

7. The steam generating system according to claim 6, characterized in that: The steam generation system further includes: a control module conductively connected to the first conductive part, the second conductive part, the control valve and the magnetizer; The control module is used to close the control valve and the magnetizer and energize the first conductive part and the second conductive part, and after a preset energization period, open the control valve and the magnetizer and stop energizing the first conductive part and the second conductive part.

8. The steam generating system according to any one of claims 1 to 5, characterized in that: The steam generation system further includes: a liquid level sensor and a control module conductively connected to the liquid level sensor, the steam generator, and the control valve; The liquid level sensor is used to obtain and send to the control module a first water level of the steam generator before the cooking appliance cooks; The control module is used for closing the control valve and opening the steam generator when the first water level reaches a first preset water level.

9. The steam generating system according to claim 8, characterized in that: The liquid level sensor is also used to obtain and send to the control module a second water level of the steam generator during cooking by the cooking appliance; The control module is further configured to determine whether the second water level reaches a second preset water level, and if not, to open the control valve and close the steam generator.

10. The steam generating system according to any one of claims 1 to 5, characterized in that: The steam generating system further comprises: a motor installed at the water outlet of the steam generator and a control module conductively connected to the steam generator and the motor; The control module is used to drive the motor to discharge the remaining water in the steam generator after the cooking appliance finishes cooking.

11. A cooking utensil, characterized in that: A steam generating system comprising the steam generating system according to any one of claims 1 to 10.

12. A method for controlling a cooking appliance according to claim 11, characterized in that: The control method comprises: closing a control valve of a steam generating system, and applying power to a first conductive part and a second conductive part of the steam generating system to form an anti-scaling electric field between an anode and a cathode of the steam generating system; After the power is turned on for a preset time, the power supply to the first conductive part and the second conductive part is stopped, and the control valve is opened to transport the water in the water tank of the steam generating system to the steam generator of the steam generating system.

13. The control method according to claim 12, characterized in that: The steam generation system further comprises: a magnetizer, which is used to magnetize the water before it flows into the steam generator; Before power is supplied to the first conductive part and the second conductive part, the control method further includes turning off the magnetizer, and after power is supplied to the first conductive part and the second conductive part for the preset time period, the control method further includes turning on the magnetizer.

14. The control method according to claim 13, characterized in that: The control method further comprises: obtaining a first water level of the steam generator before cooking in the cooking appliance; When the first water level reaches a first preset water level, the control valve is closed and the steam generator is opened.

15. The control method according to claim 12, characterized in that: The control method further comprises: Step a, during the cooking process of the cooking utensil, obtaining a second water level in the steam generator; Step b: determine whether the second water level reaches a second preset water level; if not, open the control valve and close the steam generator.

16. The control method according to claim 15, characterized in that: Step b further includes: if the second water level reaches the second preset water level, closing the control valve and opening the steam generator; After step b, the control method further includes: judging whether the cooking appliance has completed cooking, and if so, turning off the steam generator and draining the water in the steam generator; otherwise, executing step a.

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