Steam generating device for detecting inclined dry burning and electric cooking utensil

Abstract

The invention relates to a steam generating device for detecting inclined dry burning and an electric cooking utensil, and the steam generating device is characterized in that a first water inlet is formed in one side of an evaporation cavity of a steam generator, and the first water inlet is communicated with a water control assembly through a communicating pipe; the temperature sensor is arranged on the bottom surface, far away from the first water inlet, of the evaporation cavity, is connected with the controller and is used for collecting temperature information and transmitting the temperature information to the controller; and the controller is connected with a heating assembly of the steam generator and used for judging the inclination condition of the steam generator according to the change rate of the temperature information and controlling the heating assembly by adopting corresponding preset control strategies according to different inclination conditions. According to the steam heating device, the problems that the service life of the device is shortened and potential safety hazards exist due to the dry burning condition when the steam heating device is inclined at an unfavorable angle in the prior art are solved; the device effectively adapts to different disclosure inclination, continuous dry burning is prevented, and the use safety is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances, and in particular to a steam generating device and an electric cooking appliance for detecting inclined dry burning. Background Art

[0002] Steam generating devices currently on the market usually use atmospheric pressure water control or buoyancy water control to achieve water control during the operation of the steam generating device. In order to prevent dry burning, a weighing sensor is installed at the bottom of the steam heating plate of the steam generating device; the weighing sensor detects the mass of water in the steam heating plate to determine whether dry burning occurs. However, the defect of this solution is that if the steam generating device is tilted at an unfavorable angle (that is, one end of the steam heating plate cannot be completely covered by water), the weighing sensor will still detect that there is water in the steam heating plate and dry burning will occur, thereby shortening the service life of the device and posing a safety hazard.

[0003] Regarding the steam heating device in the related art, when it is tilted at an unfavorable angle, dry burning may occur, thereby shortening the service life of the device and posing a safety hazard. No effective solution has been proposed so far. Summary of the invention

[0004] In this embodiment, a steam generating device and an electric cooking appliance for detecting tilted dry burning are provided to solve the problem in the related art that when the steam heating device is tilted at an unfavorable angle, dry burning may occur, thereby shortening the service life of the device and posing a safety hazard.

[0005] In a first aspect, a steam generating device for detecting inclined dry burning is provided in this embodiment, comprising a machine base and a controller, a water control component, a connecting pipe, a steam generator and a temperature sensor arranged on the machine base;

[0006] The steam generator comprises an evaporation chamber and a heating component, a first water inlet is provided on one side of the evaporation chamber, and the first water inlet is connected to the water control component through the connecting pipe;

[0007] The temperature sensor is arranged on the bottom surface of the evaporation chamber away from the first water inlet, connected to the controller, and used to collect temperature information and transmit the temperature information to the controller;

[0008] The controller is connected to the heating component and is used to determine the tilt condition of the steam generator according to the rate of change of the temperature information, and to control the heating component using a corresponding preset control strategy according to different tilt conditions.

[0009] In some embodiments, the projection of the bottom surface where the first water inlet is located is taken as a starting point; a line is formed by extending the starting point to the geometric center of the bottom surface; a perpendicular line passing through the geometric center and the line is taken as a dividing line; the bottom surface is divided into a first area and a second area based on the dividing line; the first area is close to the connecting pipe; the second area is far from the connecting pipe;

[0010] The temperature sensor is arranged in the second area or on the dividing line.

[0011] In some of the embodiments, the difference between the top surface of the temperature sensor and the liquid level of the stable water level on the evaporation chamber satisfies a first height threshold.

[0012] In some of the embodiments, the water control assembly includes a water tank, a one-way valve, and a buoyancy water control module;

[0013] The water tank is arranged on the buoyancy water control module;

[0014] The one-way valve is disposed between the water tank and the buoyancy water control module, and is used to control the one-way flow of water in the water tank to the buoyancy water control module.

[0015] In some of the embodiments, the buoyancy water control module includes a seal, a valve cover, a flexible member, a float and a valve seat;

[0016] The valve seat is fixedly arranged on the machine base through the sealing member;

[0017] The valve cover is arranged on the valve seat, and a second water inlet is opened on the valve cover;

[0018] The float is nested on the valve seat, and the flexible member is arranged on the float;

[0019] Driven by the float, the flexible member is attached to or separated from the second water inlet.

[0020] In a second aspect, an electric cooking appliance is provided in this embodiment, comprising a steam generating device for detecting inclined dry burning as described in the first aspect.

[0021] In a third aspect, a control method for an electric cooking appliance is provided in this embodiment, which is applicable to the electric cooking appliance described in the second aspect. The control method for the electric cooking appliance includes:

[0022] starting the electric cooking appliance;

[0023] Acquiring temperature information collected by the temperature sensor, and determining the tilt of the steam generating device according to the rate of change of the temperature information;

[0024] According to different tilt conditions, corresponding preset control strategies are adopted to control the heating components in the steam generating device.

[0025] In some embodiments, judging the tilt of the steam generating device according to the rate of change of the temperature information includes:

[0026] When the change of the temperature information does not rise to the time value of the first temperature, it is judged that the steam generating device is in a non-tilted state; the first temperature is the temperature information collected by the temperature sensor when the steam generating device is in over-temperature protection;

[0027] From the change of the temperature information, the time value of the second rise from the second temperature to the first temperature is obtained; the second temperature is the temperature information collected by the temperature sensor when the heating component starts to work;

[0028] When the time value is greater than or equal to a preset time threshold, it is determined that the steam generating device is in a small-angle tilt state;

[0029] When the time value is less than a preset time threshold, it is determined that the steam generating device is in a large-angle tilt state.

[0030] In some embodiments, the controlling the heating component in the steam generating device by using a corresponding preset control strategy according to different tilt conditions includes:

[0031] When the steam generating device is in a non-tilted state, controlling the heating component in the steam generating device according to preset heating parameters;

[0032] or, when the steam generating device is in a state of being tilted at a small angle, reducing the power of the heating component in the steam generating device to a preset power, and continuing to heat the steam generating device according to the preset power until the heating time is greater than or equal to the preset heating time;

[0033] Alternatively, when the tilt condition is determined to be a large-angle tilt, the heating component in the steam generating device is stopped from heating.

[0034] In some embodiments, the method further comprises:

[0035] After the heating component in the steam generating device stops heating, an alarm signal is generated, and an alarm is issued according to the alarm signal.

[0036] Compared with the related art, the steam generating device and electric cooking appliance for detecting inclined dry burning provided in this embodiment, wherein the steam generating device comprises a machine base and a controller, a water control component, a connecting pipe, a steam generator and a temperature sensor arranged on the machine base; the steam generator comprises an evaporation chamber and a heating component, a first water inlet is arranged on one side of the evaporation chamber, and the first water inlet is connected to the water control component through the connecting pipe; the temperature sensor is arranged on the bottom surface of the evaporation chamber away from the first water inlet, connected to the controller, and used to collect temperature information and transmit the temperature information to the controller; the controller is connected to the heating component and used to collect temperature information according to the rate of change of the temperature information The tilt condition of the steam generator is judged, and the corresponding preset control strategy is adopted to control the heating component according to different tilt conditions; the problem in the related technology that the steam heating device is prone to dry burning when tilted at an unfavorable angle, thereby shortening the service life of the device and posing a safety hazard is solved; the temperature information is collected by using a temperature sensor arranged on the bottom surface of the steam generator away from the first water inlet, and the tilt condition is judged in combination with the rate of change of the temperature information, and the corresponding preset control strategy is adopted to control the heating component according to different tilt conditions, so as to effectively adapt to different bottom tilts to prevent continuous dry burning and ensure safety of use.

[0037] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0039] Figure 1 is a structural schematic diagram of a steam generating device provided in one embodiment of the present application;

[0040] Figure 2 This is a schematic diagram of the optimal position for setting a temperature sensor provided in an embodiment of the present application;

[0041] Figure 3 is a structural block diagram of a steam generator provided in one embodiment of the present application;

[0042] Figure 4 is a flow chart of a control method for an electric cooking appliance provided in one embodiment of the present application;

[0043] Figure 5 is a structural schematic diagram of a steam generating device provided in a second embodiment of the present application;

[0044] Figure 6It is a flowchart of a control method of an electric cooking appliance provided in one embodiment of the present application;

[0045] Figure 7 This is a schematic diagram of the rate of change of temperature information under a small-angle tilt state provided by an embodiment of the present application;

[0046] Figure 8 This is a schematic diagram of the rate of change of temperature information under a large-angle tilt state provided by an embodiment of the present application.

[0047] In the figure: 10, machine base; 20, controller; 31, water tank; 32, one-way valve; 331, sealing member; 332, valve cover; 333, flexible member; 334, float; 335, valve seat; 40, connecting pipe; 50, steam generator; 51, evaporation chamber; 52, first water inlet; 53, heating pipe; 60, temperature sensor. DETAILED DESCRIPTION

[0048] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0049] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0050] In this embodiment, a steam generating device for detecting inclined dry burning is provided. Figure 1is a structural diagram of a steam generating device for detecting inclined dry burning in this embodiment, such as Figure 1 As shown, the steam generating device comprises: a machine base 10 and a controller 20, a water control component, a connecting pipe 40, a steam generator 50 and a temperature sensor 60 arranged on the machine base 10;

[0051] The steam generator 50 includes an evaporation chamber and a heating component. A first water inlet is provided on one side of the evaporation chamber. The first water inlet is connected to the water control component through a connecting pipe 40.

[0052] The temperature sensor 60 is disposed on the bottom surface of the evaporation chamber away from the first water inlet, connected to the controller 20, and used to collect temperature information and transmit the temperature information to the controller 20;

[0053] The controller 20 is connected to the heating component and is used to determine the tilt condition of the steam generator 50 according to the rate of change of the temperature information, and to control the heating component according to different tilt conditions using corresponding preset control strategies.

[0054] It should be noted that the machine base 10 is the installation base, and components such as the controller 20 , the water control component, the connecting pipe 40 , the steam generator 50 and the temperature sensor 60 can all be considered to be installed on the machine base 10 . Figure 1 This is only an example structure, which does not limit the structure of the above steam generating device. For example, the steam generating device may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0055] The connecting pipe 40 may be a pipe fitting or a pipe provided on the machine base 10. The connecting pipe 40 is used to connect the water control component and the steam generator 50. The steam generator 50 includes an evaporation chamber and a heating component, and the heating component may be a heating component provided below the evaporation chamber. A first water inlet is provided on one side of the evaporation chamber, and the first water inlet is connected to the water control component through the connecting pipe. The heating component heats and evaporates the liquid in the evaporation chamber under the control of the controller. The water control component adopts solutions such as atmospheric pressure water control, buoyancy water control, or automatic control by the controller 20, and water is introduced into the evaporation chamber of the steam generator 50 through the connecting pipe 40. Atmospheric pressure water control and buoyancy water control are structural water control schemes. After the structure is designed, water is automatically fed into the evaporation chamber of the steam generator 50. The controller 20 automatically controls the water inflow and the time of water inflow. For example, the controller 20 estimates the evaporation amount of water according to the power of the heating component in the evaporation chamber of the steam generator 50 to calculate the water inflow and the time of water inflow, and controls the water control component to feed water into the evaporation chamber of the steam generator 50 through the connecting pipe 40 according to the water inflow and the time of water inflow. These water control schemes will cause dry burning when the steam generator 50 is tilted, thereby shortening the service life of the device and posing a safety hazard.

[0056] In order to solve the above-mentioned problems, the setting position of the temperature sensor 60 and the control method of the controller 20 are improved accordingly in this embodiment. A heating component is set under the evaporation chamber of the steam generator 50, and the heating component heats the bottom surface of the evaporation chamber to evaporate the water in the evaporation chamber; if the water covers the bottom surface, the temperature of the bottom surface will not rise to a very high temperature due to the presence of water; if the water does not cover the bottom surface, the temperature of the bottom surface will quickly rise to a very high temperature. Since the temperature sensor 60 is set on the bottom surface of the evaporation chamber away from the first water inlet; then when the steam generator 50 is tilted at an unfavorable angle; that is, Figure 1 The right side of the steam generator 50 is lifted, and at this time, the right side of the bottom surface of the evaporation chamber (the side away from the water inlet, where the temperature sensor 60 is also arranged) cannot be covered by water after being lifted; therefore, the rate of change of the temperature information collected by the temperature sensor 60 can determine whether dry burning occurs, and then control the heating component according to different inclination conditions using the corresponding preset control strategy to effectively adapt to different bottom inclinations to prevent continuous dry burning and ensure safety in use.

[0057] The steam generating device for detecting inclined dry burning comprises a machine base 10 and a controller 20, a water control component, a connecting pipe 40, a steam generator 50 and a temperature sensor 60 arranged on the machine base 10; the steam generator 50 comprises an evaporation chamber and a heating component, a first water inlet is arranged on one side of the evaporation chamber, and the first water inlet is connected to the water control component through the connecting pipe 40; the temperature sensor 60 is arranged on the bottom surface of the evaporation chamber away from the first water inlet, and is connected to the controller 20 for collecting temperature information and transmitting the temperature information to the controller 20; the controller 20 is connected to the heating component for judging the steam generator according to the rate of change of the temperature information. The inclination of the steam generator 50 is determined, and the corresponding preset control strategy is used to control the heating component according to different inclination conditions; the problem in the related art that the steam heating device is prone to dry burning when it is tilted at an unfavorable angle, thereby shortening the service life of the device and posing a safety hazard is solved; the temperature information is collected by using a temperature sensor 60 arranged on the bottom surface of the steam generator 50 away from the first water inlet, and the inclination condition is judged in combination with the rate of change of the temperature information, and the corresponding preset control strategy is used to control the heating component according to different inclination conditions, so as to effectively adapt to different inclinations to prevent continuous dry burning and ensure safety in use.

[0058] The following is a detailed description of each of the above components:

[0059] In some embodiments, in order to reduce the requirements for the installation process, the temperature sensor 60 is set to have a wider requirement. It can be: take the projection of the bottom surface where the first water inlet is located as the starting point; extend the starting point to the geometric center of the bottom surface to form a connecting line; take the vertical line passing through the geometric center and the connecting line as the dividing line; divide the bottom surface into a first area and a second area based on the dividing line; the first area is close to the connecting pipe 40; the second area is far away from the connecting pipe 40;

[0060] The temperature sensor 60 is disposed in the second area or on the dividing line.

[0061] Specifically, the temperature sensor 60 is disposed on the second area or the dividing line. When the steam generator 50 is tilted, the sensitivity of the temperature sensor 60 can be increased immediately to determine the tilting condition.

[0062] Furthermore, the optimal position for setting the temperature sensor 60 is at a symmetrical point between the starting point and the dividing line, such as Figure 2 As shown. The shape of the bottom surface of the steam generator 50 is not only the circle shown in the figure, but can be any shape. For different bottom surface shapes, similar principles can be used to determine the position of the temperature sensor 60, which will not be illustrated one by one.

[0063] In some embodiments, the difference between the top surface of the temperature sensor 60 and the liquid level of the stable water level on the evaporation chamber satisfies a first height threshold.

[0064] Specifically, the first height threshold is pre-set. By adjusting the structural or installation parameters of the water control component and the steam generating device, the liquid level height h of the water level of the steam generator 50 when stable can be controlled, and then the difference between the top surface of the temperature sensor 60 and the liquid surface of the stable water level on the steam generator 50 can be controlled; wherein, the liquid level height h can be between 6mm-15mm, and the liquid surface difference Δh between the top surface of the temperature sensor 60 and the stable water level on the steam generator 50 can be between 3mm-7mm. By controlling the above parameters, it is ensured that no misjudgment occurs when the water level is tilted at a small angle.

[0065] In order to further reduce the occurrence of misjudgment, the liquid level height h is preferably 11 mm, and the liquid level difference Δh is 5 mm. The range of the tilt angle β is 0<β≤5°; β is preferably 3°. This ensures that the tilt dry-burn protection will not be triggered when the tilt angle α≤3°, and when the tilt angle is greater than 3°, the tilt dry-burn protection will be triggered after a period of power-on operation.

[0066] In some of the embodiments, the water control assembly includes a water tank 31, a one-way valve 32, and a buoyancy water control module;

[0067] The water tank 31 is arranged on the buoyancy water control module;

[0068] The one-way valve 32 is disposed between the water tank 31 and the buoyancy water control module, and is used to control the one-way flow of water from the water tank 31 to the buoyancy water control module.

[0069] Specifically, water is filled in the water tank 31 and then arranged on the buoyancy water control module; then the water in the water tank 31 is injected into the buoyancy water control module under the action of gravity until the float 334 in the buoyancy water control module floats up and seals the second water inlet. The one-way valve 32 is arranged between the water tank 31 and the buoyancy water control module. The one-way valve 32 has a one-way conduction function, which can control the water in the water tank 31 to flow into the buoyancy water control module, and the one-way valve 32 is closed to prevent water from flowing out.

[0070] In this embodiment, a buoyancy water control structure is adopted, which is simple, reliable and has low production cost. In other embodiments, if an atmospheric pressure water control scheme is adopted, the structure of the buoyancy water control module can be adjusted accordingly, which will not be described in detail here.

[0071] In some embodiments, such as Figure 1 As shown in FIG. 4 , the buoyancy water control module includes a sealing member 331 , a valve cover 332 , a flexible member 333 , a float 334 and a valve seat 335 ;

[0072] The valve seat 335 is fixedly arranged on the machine base 10 through the sealing member 331;

[0073] The valve cover 332 is disposed on the valve seat 335, and a second water inlet is formed on the valve cover 332;

[0074] The float 334 is nested on the valve seat 335 , and a flexible member 333 is provided on the float 334 ;

[0075] Driven by the float 334 , the flexible member 333 is attached to or separated from the second water inlet.

[0076] Specifically, the valve seat 335 is the installation base of the buoyancy water control module, and the valve seat 335 is fixedly arranged on the machine base 10 through the sealing member 331 to prevent the valve seat 335 from leaking. The float 334 is nested on the valve seat 335, and the flexible member 333 is installed on the float 334; the valve cover 332 is installed on the valve seat 335, thereby closing the flexible member 333 and the float 334; the valve cover 332 vent and the second water inlet are provided on the valve cover 332. Therefore, when the water tank 31 is filled with water into the valve seat 335 through the second water inlet, the float 334 floats up together with the flexible member 333, so that the flexible member 333 contacts the second water inlet, and the flexible member 333 is deformed in contact with the second water inlet, thereby sealing the water in the water tank 31.

[0077] In this embodiment, the buoyancy water control module that implements the buoyancy water control method through the above structure has high reliability and reduces product failure rate.

[0078] In some embodiments, such as Figure 1 and Figure 3 As shown, the evaporation chamber 51 is provided with a first water inlet 52, which is connected to the connecting pipe 40, so that the water in the buoyancy water control module enters the evaporation chamber 51 through the first water inlet 52; the heating component can be a heating tube 53, which can be welded under the evaporation chamber 51, connected to the controller, and works under the control of the controller. For example, the controller can control the heating time and heating function of the heating tube. The temperature sensor 60 is arranged on the bottom surface of the evaporation chamber away from the first water inlet 52.

[0079] In some of the embodiments, the steam generator 50 further includes a cooking cavity and other devices. Based on the steam generating device having the structures of the above embodiments, the working principle is as follows:

[0080] Before the work starts, the water tank is set on the buoyancy water control module, and water is taken in from the water tank into the valve seat 335 of the buoyancy water control module through the second water inlet, and the water in the valve seat 335 is taken in into the evaporation chamber 51 of the steam generator 50 through the connecting pipe 40; at this time, the float 334 floats up together with the flexible member 333, so that the flexible member 333 contacts the second water inlet, and the flexible member 333 is deformed in accordance with the second water inlet, thereby sealing the water inlet to the water tank, and the water tank stops taking water into the buoyancy water control module.

[0081] After starting to work, the controller controls the heating tube 53 to work, the evaporation chamber 51 is heated, and the water in the evaporation chamber 51 is vaporized to generate steam evaporation, and the steam flows into the cooking chamber to heat the food inside. As the water in the evaporation chamber 51 is consumed, the internal liquid level drops, causing the float 334 in the valve seat 335 to drop accordingly, thereby separating the flexible member 333 from the second water inlet, and the water in the water tank continues to flow in until the liquid level of the steam generator 50 reaches a balanced position, and this cycle continues until the cooking is finished.

[0082] It should be noted that the above-mentioned unit modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above-mentioned modules can be located in the same processor; or the above-mentioned modules can be located in different processors in any combination.

[0083] In this embodiment, an electric cooking appliance is also provided, comprising the above-mentioned steam generating device for detecting inclined dry burning.

[0084] The steam generating devices in the above embodiments can be applied to electric cooking appliances, including but not limited to electric lunch boxes, egg cookers, and yogurt machines.

[0085] The above-mentioned electric cooking appliance solves the problem in the related art that when the steam heating device is tilted at an unfavorable angle, dry burning may occur, thereby shortening the service life of the device and posing a safety hazard. The temperature sensor 60 arranged on the bottom surface of the steam generator 50 away from the first water inlet 52 is used to collect temperature information, and the tilting condition is judged in combination with the rate of change of the temperature information. According to different tilting conditions, the corresponding preset control strategy is adopted to control the heating component in the steam heating device, so that it can effectively adapt to different bottom tilts to prevent continuous dry burning and ensure safety of use.

[0086] In this embodiment, a control method for an electric cooking appliance is also provided, which is applicable to the above-mentioned electric cooking appliance. Figure 4 As shown, the control method of the electric cooking appliance comprises the following steps:

[0087] Step S210, starting the electric cooking appliance;

[0088] Step S220, obtaining temperature information collected by the temperature sensor, and determining the tilt of the steam generating device according to the rate of change of the temperature information;

[0089] Step S230, controlling the heating components in the steam heating device using corresponding preset control strategies according to different tilt conditions.

[0090] Specifically, starting the electric cooking appliance means that the controller controls the heating tube to work, heats the evaporation chamber 51, causes the water in the evaporation chamber 51 to vaporize and generate steam, and the steam flows into the cooking chamber to heat the food inside. In this embodiment, the electric cooking appliance is started only when the water in the water control component is in a stable state through the connecting pipe 40 and the water level in the steam generator. For example: when the liquid level difference between the top surface of the temperature sensor and the stable water level on the evaporation chamber of the steam generator meets the first height threshold, it is considered that the water level is in a stable state. In other embodiments, the electric cooking appliance can also be started when there is water in the evaporation chamber 51, and there is no limitation on this.

[0091] After the electric cooking appliance is started, the temperature sensor will collect temperature information in real time; the temperature information collected here is related to the location of the temperature sensor; the temperature sensor is set on the bottom surface of the steam generator away from the first water inlet, and the temperature information can represent the temperature change rate at this location. Figure 5 As shown, when the tilt occurs toward the water tank 31 end, the water supplied to the steam generator 50 at this time cannot completely cover the entire bottom of the steam generator 50. When the heating tube is working, the temperature sensor 60 will heat up rapidly because there is no water covering it. The rising temperature will exceed the temperature when soaked in water. The temperature change rate here can be used to judge the tilt situation; and then the corresponding preset control strategy is adopted to control the heating component in the steam heater according to different tilt situations.

[0092] Through the above method, the problem in the related art that the steam heating device may dry burn when tilted at an unfavorable angle, thereby shortening the service life of the device and posing a safety hazard is solved; the temperature sensor 60 arranged on the bottom surface of the steam generator 50 away from the first water inlet is used to collect temperature information, and the tilt condition is judged in combination with the rate of change of the temperature information. According to different tilt conditions, the corresponding preset control strategy is used to control the heating component in the steam heating device, so that it can effectively adapt to different bottom tilts to prevent continuous dry burning and ensure safety of use.

[0093] In some embodiments, in step S220, judging the tilt of the steam generating device according to the rate of change of the temperature information includes the following steps:

[0094] Step S221, when the temperature information does not rise to the time value of the first temperature, it is determined that the steam generating device is in a non-tilted state; the first temperature is the temperature information collected by the temperature sensor when the steam generating device is in over-temperature protection;

[0095] Step S222, obtaining the time value of the second rise from the second temperature to the first temperature from the change of the temperature information; the second temperature is the temperature information collected by the temperature sensor when the heating component starts to work;

[0096] Step S223, when the time value is greater than or equal to the preset time threshold, it is determined that the steam generating device is in a small-angle tilt state;

[0097] Step S224: when the time value is less than the preset time threshold, it is determined that the steam generating device is in a large-angle tilt state.

[0098] Specifically, Figure 6 As shown, due to the principle of communicating vessels, the above tilting is equivalent to the steam generator in the steam generating device being raised, and the water volume in the evaporation chamber is reduced, and the speed at which the water in the water chamber of the buoyancy water control module enters the evaporation chamber will also be slowed down. The influence of tilting in other directions on the water entering the evaporation chamber is not as great as that in this direction, which makes dry burning more likely. Therefore, this direction should be used as the basis for judging tilted dry burning.

[0099] According to the rate of change of the temperature information, in this embodiment, the tilting situation can be divided into multiple situations: such as: the steam generator in the steam generating device is in a non-tilted state, the steam generator in the steam generating device is in a small-angle tilted state, and the steam generator in the steam generating device is in a large-angle tilted state. Among them, when the steam generator is in a non-tilted state, the evaporation chamber of the steam generator is always replenished with water, and dry burning will not occur. Therefore, as long as the change in temperature information does not rise to the time value of the first temperature (the temperature information collected by the temperature sensor when the steam generating device is in over-temperature protection), it can be judged that the steam generator is in a non-tilted state.

[0100] When the steam generator is in a small angle tilt state, there is still a certain amount of water in the evaporation chamber of the steam generator to support boiling for a period of time. After the water evaporates, the water in the buoyancy water control module cannot be quickly replenished to the evaporation chamber, which will cause the water to become less and less until dry boiling occurs. The temperature collected by the temperature sensor will also become higher and higher. After the electric cooking appliance enters the temperature protection and stops heating, water will be slowly replenished. At this time, the temperature collected by the temperature sensor decreases, and the steam generator starts heating again. This cycle is repeated, causing the temperature information collected by the temperature sensor to fluctuate slowly, such as Figure 7 shown.

[0101] In this case, the first temperature and the second temperature will be used as the basis for judgment. The second temperature is: the temperature information collected by the temperature sensor when the heating component starts working. First, the time value for the first rise from the second temperature to the first temperature will be obtained from the rate of change of the temperature information; at this time, in order to avoid interference and improve the accuracy of control, the heating component will be stopped; when the collected temperature information cools to the first temperature, the heating component will be controlled again, and when the time value for the second rise from the second temperature to the first temperature is obtained, if the time value is greater than or equal to the preset time threshold, it is judged that the steam generator is in a small angle tilt state; and then the corresponding preset control strategy is adopted to control the heating component according to different tilt conditions. Among them, the preset time threshold can be 0.01min-2min; the preferred preset time threshold is 30s. The specific value is related to the heating power P.

[0102] When the steam generator is tilted at a large angle, resulting in very little or no water in the evaporation chamber, the electric cooking appliance will quickly enter dry burning, and then enter the temperature protection to stop heating; after that, only a small amount of water can be replenished to the evaporation chamber or even cannot be replenished at all, causing the temperature collected by the temperature sensor to remain at a very high temperature. After waiting for the steam generator to cool to room temperature, it will quickly enter the protection to stop heating after a few seconds of restarting. The temperature information collected by the temperature sensor will experience rapid protection fluctuations, such as Figure 8 shown.

[0103] In this case, the first temperature and the second temperature are also used as the basis for judgment. When obtaining the time value for the second rise from the second temperature to the first temperature, if the time value is less than the preset time threshold, it is judged that the steam generator is in a small angle tilt state; and then the corresponding preset control strategy is adopted to control the heating component according to different tilt conditions.

[0104] In some embodiments, the step S230 of controlling the heating component in the steam generating device by using a corresponding preset control strategy according to different tilt conditions includes the following steps:

[0105] When the steam generating device is in a non-tilted state, the heating components in the steam generating device are controlled according to preset heating parameters;

[0106] Or, when the steam generating device is in a state of being tilted at a small angle, the power of the heating component in the steam generating device is reduced to a preset power, and the steam generating device is continuously heated according to the preset power until the heating time is greater than or equal to the preset heating time;

[0107] Alternatively, when the tilt condition is determined to be a large-angle tilt, the heating component in the steam generating device is stopped from heating.

[0108] Specifically, the heating component is controlled by using corresponding preset control strategies in different tilt conditions.

[0109] When the steam generating device is in a non-tilted state, the heating component is controlled according to preset heating parameters; for example, heating is performed according to the heating time and heating power in the selected cooking program.

[0110] Among them, when the steam generating device is in a state of small angle tilt, the power of the heating component is reduced to the preset power, and the steam generating device is continued to be heated according to the preset power until the heating time is greater than or equal to the preset heating time; for example: the heating power is reduced from the original P to 9 / 10P-2 / 3P of P. Preferably, it is 3 / 4P-2 / 3P. The specific heating power is related to the distance between the buoyancy water control module and the steam chamber. The greater the distance, the greater the tilting effect and the more the power is reduced.

[0111] In other embodiments, the heating power can be reduced gradually and adaptively by detecting whether the temperature will reach the first temperature again. If so, the power is reduced by returning to the previous step until the minimum value 1 / 10P is reached or the temperature no longer reaches the first temperature.

[0112] When the tilt is determined to be a large angle, the heating component in the steam generating device stops heating, generates an alarm signal, and alarms are sounded according to the alarm signal. The alarm methods include but are not limited to sound (buzzer), light (alarm light) or APP reminders.

[0113] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0114] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0115] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0116] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0117] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0118] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A steam generating device for detecting inclined dry burning, characterized in that: It includes a machine base and a controller, a water control component, a connecting pipe, a steam generator and a temperature sensor arranged on the machine base; The steam generator comprises an evaporation chamber and a heating component, a first water inlet is provided on one side of the evaporation chamber, and the first water inlet is connected to the water control component through the connecting pipe; The temperature sensor is arranged on the bottom surface of the evaporation chamber away from the first water inlet, connected to the controller, and used to collect temperature information and transmit the temperature information to the controller; The controller is connected to the heating component and is used to determine the tilt condition of the steam generator according to the rate of change of the temperature information, and to control the heating component using a corresponding preset control strategy according to different tilt conditions.

2. The steam generating device for detecting inclined dry burning according to claim 1, characterized in that: Taking the projection of the bottom surface where the first water inlet is located as the starting point; extending the starting point to the geometric center of the bottom surface to form a connecting line; taking the perpendicular line passing through the geometric center and the connecting line as the dividing line; The bottom surface is divided into a first area and a second area based on the dividing line; the first area is close to the connecting pipe; and the second area is far from the connecting pipe; The temperature sensor is arranged in the second area or on the dividing line.

3. The steam generating device for detecting inclined dry burning according to claim 1, characterized in that: The liquid level difference between the top surface of the temperature sensor and the stable water level on the evaporation chamber meets a first height threshold.

4. The steam generating device for detecting inclined dry burning according to claim 1, characterized in that: The water control assembly includes a water tank, a one-way valve and a buoyancy water control module; The water tank is arranged on the buoyancy water control module; The one-way valve is disposed between the water tank and the buoyancy water control module, and is used to control the one-way flow of water in the water tank to the buoyancy water control module.

5. The steam generating device for detecting inclined dry burning according to claim 4, characterized in that: The buoyancy water control module includes a sealing member, a valve cover, a flexible member, a float and a valve seat; The valve seat is fixedly arranged on the machine base through the sealing member; The valve cover is arranged on the valve seat, and a second water inlet is opened on the valve cover; The float is nested on the valve seat, and the flexible member is arranged on the float; Driven by the float, the flexible member is attached to or separated from the second water inlet.

6. An electric cooking appliance, characterized in that: The invention comprises a steam generating device for detecting inclined dry burning as claimed in any one of claims 1 to 5.

7. A method for controlling an electric cooking appliance, characterized in that: Applicable to the electric cooking appliance as claimed in claim 6, the control method of the electric cooking appliance comprises: starting the electric cooking appliance; Acquiring temperature information collected by the temperature sensor, and determining the tilt of the steam generating device according to the rate of change of the temperature information; According to different tilt conditions, corresponding preset control strategies are adopted to control the heating components in the steam generating device.

8. The control method of the electric cooking appliance according to claim 7, characterized in that: The step of judging the tilt of the steam generating device according to the rate of change of the temperature information comprises: When the change of the temperature information does not rise to the time value of the first temperature, it is judged that the steam generating device is in a non-tilted state; the first temperature is the temperature information collected by the temperature sensor when the steam generating device is in over-temperature protection; From the change of the temperature information, the time value of the second rise from the second temperature to the first temperature is obtained; the second temperature is the temperature information collected by the temperature sensor when the heating component starts to work; When the time value is greater than or equal to a preset time threshold, it is determined that the steam generating device is in a small-angle tilt state; When the time value is less than a preset time threshold, it is determined that the steam generating device is in a large-angle tilt state.

9. The control method of the electric cooking appliance according to claim 7, characterized in that: The method of controlling the heating component in the steam generating device by using a corresponding preset control strategy according to different tilt conditions includes: When the steam generating device is in a non-tilted state, controlling the heating component in the steam generating device according to preset heating parameters; or, when the steam generating device is in a state of being tilted at a small angle, reducing the power of the heating component in the steam generating device to a preset power, and continuing to heat the steam generating device according to the preset power until the heating time is greater than or equal to the preset heating time; Alternatively, when the tilt condition is determined to be a large-angle tilt, the heating component in the steam generating device is stopped from heating.

10. The control method of the electric cooking appliance according to claim 9, characterized in that: The method further comprises: After the heating component in the steam generating device stops heating, an alarm signal is generated, and an alarm is issued according to the alarm signal.

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