A steam oven and a control method thereof

Abstract

The application provides a steaming oven and a control method thereof, and particularly relates to the technical field of kitchen appliances. The steaming oven comprises: an oven body; a water storage tank; a steam generator in communication with the water storage tank through a water inlet pipeline, wherein a water inlet pump and a flow meter are arranged on the water inlet pipeline; a water-vapor separator in communication with the steam generator and the cavity; and a controller configured to: start a cooking program set by a user, the cooking program comprising a target cooking temperature; obtain a circulating water amount, a first time length and a second time length corresponding to the target cooking temperature according to a preset correspondence relationship; and control the steam generator and the water inlet pump to work periodically in the case that the steam generator has an initial water amount; wherein in each heating cycle, after the steam generator works for the first time length, the steam generator is controlled to pause for the second time length, and after the steam generator pauses for the second time length, the water inlet pump is controlled to draw the circulating water amount of water into the steam generator according to the water inlet amount of the steam generator detected by the flow meter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a steaming oven and a control method thereof. BACKGROUND

[0002] At present, with the improvement of people's living standards, the functions of kitchen appliances are constantly upgraded. Traditional ovens and microwave ovens can cause water loss in food, affecting the taste of food, while steaming ovens not only can bake but also have the function of tender baking, so that the water in the food can be well preserved.

[0003] However, in the existing steaming oven, the water inflow in the steam generator cannot be accurately controlled. If the water inflow is too much, it will wet the food and affect the cooking effect; if the water inflow is too little, it will cause insufficient steam generation, affecting the cooking efficiency, and even may cause dry burning of the steam generator, which has certain safety hazards. SUMMARY

[0004] The embodiments of the present application provide a steaming oven and a control method thereof, which are used to accurately control the water inflow of the steam generator.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a steaming oven is provided, which comprises:

[0007] a cabinet, which has a cavity inside for placing food materials;

[0008] a water storage tank, which is installed outside the cabinet and is used to store water;

[0009] a steam generator, which is communicated with the water storage tank through a water inflow pipeline, and a water inflow pump and a flow meter are arranged on the water inflow pipeline, the water inflow pump is used to pump the water in the water storage tank into the steam generator, and the flow meter is used to detect the water inflow of the steam generator; the steam generator is used to heat the water from the water storage tank to boiling;

[0010] a water-vapor separator, which is communicated with the steam generator through a first steam pipeline and is communicated with the cavity through a second steam pipeline, and is used to separate the water vapor from the steam generator into gas and liquid, and the separated water vapor is delivered to the cavity through the second steam pipeline;

[0011] a controller, which is electrically connected with the steam generator, the water inflow pump and the flow meter; the controller is configured to:

[0012] start a cooking program set by a user, the cooking program comprising a target cooking temperature; and obtain, according to a preset correspondence, a circulating water amount corresponding to the target cooking temperature and a first time length and a second time length corresponding to the circulating water amount;

[0013] During the execution of the cooking program, in the case that the steam generator has an initial water amount, the steam generator and the water inlet pump are controlled to work periodically;

[0014] In each heating cycle, the steam generator is controlled to work for a first duration, then is paused for a second duration, and after the steam generator is paused for the second duration, the water inlet pump is controlled to pump the circulating water amount of water into the steam generator according to the water amount of the steam generator detected by the flow meter.

[0015] The steam generator can convert the water in the steam generator into water vapor during the working process, and the water vapor liquefies and releases heat after reaching the cavity, so that the food materials in the cavity are cooked. Because the amount of water vapor generated by the steam generator affects the cooking speed of the food materials and also affects the taste of the food materials, controlling the amount of steam generated by the steam generator can effectively ensure the cooking effect.

[0016] The technical solutions provided by the embodiments of the present application at least bring the following beneficial effects:

[0017] By arranging the flow meter on the water inlet pipeline, the water amount of the steam generator can be accurately detected to control the water amount in each heating cycle to be the circulating water amount. In the case that the steam generator has an initial water amount, the steam generator can directly control the initial water amount to be heated, thereby avoiding dry burning. By controlling the steam generator and the water inlet action to complete heating, pause heating and pause in each heating cycle, the amount of steam generated by the steam generator can be accurately controlled. In each heating cycle, the circulating water amount pumped into the steam generator corresponds to the target cooking temperature in the cooking program, so that the water vapor generated by the circulating water amount in each heating cycle can meet the heating demand of the target cooking temperature. At the same time, the first duration (i.e. the heating duration) during which the steam generator continuously works and the second duration (i.e. the pause heating duration) during which the steam generator is paused correspond to the circulating water amount, so that the circulating water amount can be heated and converted into water vapor in the first duration, thereby the water vapor in the cavity can be accurately controlled to ensure the cooking effect.

[0018] In some embodiments, the steam oven further comprises a drain pump arranged on a drain pipeline, one end of the drain pipeline being connected with the water storage tank, and the other end of the drain pipeline being in communication with the steam generator and the water vapor separator, the drain pump being used to pump the water in the steam generator and the water vapor separator into the water storage tank; the controller is electrically connected with the drain pump, and the controller of the steam oven is further configured to: when the execution duration of the cooking program reaches the target cooking duration, control the cooking program to end, and control the drain pump to pump the water in the steam generator and the water vapor separator back into the water storage tank.

[0019] From the above embodiments, by controlling the drain pump to pump the residual water in the steam generator and the water vapor separator back to the water storage tank at the end of the cooking program, it can be ensured that the steam generator, the water vapor separator and the water inlet pipeline are all in a water-free state after the cooking program ends. In this way, on the one hand, it can reduce the generation of scale and avoid clogging the steam generator, the water vapor separator and the water inlet pipeline, and on the other hand, it can avoid the deterioration of residual water and affect the effect of the next cooking.

[0020] In some embodiments, the water vapor separator of the steam oven is also in communication with the water storage tank through the water inlet pipeline, and the controller of the steam oven is further configured to: before controlling the steam generator and the water inlet pump to work periodically, control the water inlet pump to pump an initial water amount of water into the steam generator and the water separator, the initial water amount being greater than a first preset water amount and less than or equal to a second preset water amount; wherein the first preset water amount is the sum of the water amount when dry burning of the steam generator occurs and the water amount consumed by the steam generator in the first time period for the first time, and the second preset water amount is a water amount that is half of the sum of the volumes of the steam generator and the water vapor separator.

[0021] From the above embodiments, the water vapor separator can be in communication with the steam generator through the water inlet pipeline, so that the water pumped into the water vapor separator can keep the water amount in the steam generator stable, thereby delivering a stable amount of steam into the cavity. Since the steam generator is in a water-free state when starting the cooking program, dry burning may occur if heating is performed at this time, which poses a certain safety hazard. Therefore, before controlling the steam generator and the water inlet pump to work periodically, an initial water amount of water needs to be stored in the steam generator to prevent dry burning. In order to prevent dry burning, the initial water amount of water is not less than the first preset water amount, i.e. the sum of the dry burning water level and the water consumed by the steam generator in the first time period for the first time. In order to avoid the longer time required for heating water to boiling as the water amount increases, the initial water amount is less than the second preset amount, i.e. a water amount that is half of the sum of the volumes of the steam generator and the water vapor separator. In this way, the generation of water vapor can be ensured to be fast, thereby ensuring cooking safety while improving cooking efficiency.

[0022] In some embodiments, the steam oven further comprises a first temperature sensor arranged in the steam generator and configured to detect the temperature of the steam generator;

[0023] The controller is electrically connected with the first temperature sensor, and the controller is further configured to:

[0024] obtain the temperature value of the steam generator detected by the first temperature sensor;

[0025] when the temperature value is greater than a water replenishment temperature value, control the water inlet pump to pump an initial water amount of water into the steam generator and the water separator, the water replenishment temperature value representing a temperature value when dry burning of the steam generator occurs.

[0026] As can be seen from the above embodiments, since the temperature of the steam generator when dry burning occurs is greater than the temperature when it is working normally, when the temperature of the first temperature sensor is detected to be greater than the water replenishment temperature value, it indicates that the water in the steam generator has been completely evaporated, and there is a possibility of dry burning. At this time, the water pump needs to be controlled to draw a certain amount of water into the steam generator. Since the water in the steam generator is in a water-free state as when the steam oven is turned on after being completely evaporated, the initial amount of water can be drawn into the steam generator, that is, the occurrence of dry burning can be prevented, and the cooking efficiency can be improved.

[0027] In some embodiments, the steam oven further comprises a water hardness detector arranged in the water storage tank and configured to detect the hardness of the water in the water storage tank, different water hardness ranges corresponding to different descaling water amounts; the controller is electrically connected with the water hardness detector, and the controller of the steam oven is further configured to: determine the descaling water amount for triggering the descaling program according to the water hardness detected by the water hardness detector; determine the cumulative water amount in the steam generator after the controller last executes the descaling program according to the water amount detected by the flow meter; and issue a first prompt information when the cumulative water amount is greater than the descaling water amount, the first prompt information being used to prompt the user to trigger the descaling program.

[0028] The steam generator produces scale during the process of heating water, which not only causes blockage of the steam generator, the water vapor separator, the water inlet pipeline and the drain pipeline, but also affects the service life of the steam oven. Since the amount of scale produced by water of different hardness is different, the frequency of descaling is also different. As can be seen from the above embodiments, the water hardness detector can detect the hardness of the water in the water storage tank, and different water hardness ranges correspond to different descaling water amounts. When the cumulative water amount detected by the flow meter is greater than the descaling water amount, it indicates that the content of scale in the steam oven has reached the standard that requires descaling, at which time, the user can be prompted with a prompt information to prompt the user to timely trigger the descaling program, so as to avoid affecting the cooking efficiency of the steam oven.

[0029] In some embodiments, the controller of the steam oven is further configured to: determine an average temperature value of the steam generator according to the temperature value of the steam generator in the working process detected by the first temperature sensor; issue a first prompt information when the difference between the average temperature value and a reference temperature value is greater than a preset difference value, the first prompt information being used to prompt the user to trigger the descaling program, and the reference temperature value being determined according to the temperature data of the steam generator when the controller first executes the cooking program.

[0030] From the above embodiments, it can be seen that when the steam oven first executes the cooking program, no scale is generated in the steam generator at this time, and the temperature data can be used as the reference temperature. Since the temperature of the steam generator with scale is higher than that of the steam generator without scale when working, when the difference between the average temperature value of the steam generator and the reference temperature value is greater than the preset difference value, it indicates that the content of the scale in the steam oven has reached the standard that needs to be descaled, at this time, a prompt information can be sent to the user to prompt the user to start the descaling program in time to avoid affecting the cooking efficiency of the steam oven.

[0031] In some embodiments, the steam oven further includes a water tank detection switch arranged on the water tank and used for detecting the switching state of the water tank; the controller of the steam oven is electrically connected with the water tank detection switch, and the controller is further configured to: in response to the descaling instruction, control the water pump to work to drain the water in the steam generator and the water vapor separator; after the water pump finishes draining, send a second prompt information, the second prompt information including information for prompting the user to clean the water tank, put in clean water and put in the descaling agent; obtain the switching state of the water tank through the water tank detection switch; after detecting that the water tank is switched from the open state to the closed state, control the water pump to draw in a third preset amount of water into the steam generator and the water vapor separator, the third preset amount of water being the sum of the water capacity of the steam generator and the water vapor separator; after a preset descaling duration, control the water pump to drain; after the water pump finishes draining, perform a preset number of cleaning operations, the cleaning operation being an operation of cleaning the steam generator and the water vapor separator by controlling the water pump and the water pump to work alternately.

[0032] From the above embodiments, it can be seen that descaling is to fully react the scale in the steam generator, the water vapor separator and the pipeline with the descaling agent to remove the scale. Therefore, when the descaling program is executed, all the water in the steam oven is first drained, and then water with the descaling agent is drawn in, and after the reaction of the descaling agent and the scale is completed, the steam generator, the water vapor separator and the pipeline are flushed. The amount of water with the descaling agent can be the sum of the water capacity of the steam generator and the water vapor separator, so that the scale in the steam generator and the water vapor separator can be contacted with the descaling agent to react. Since the reaction of the descaling agent and the scale needs time, the steam generator, the water vapor separator and the pipeline can be flushed after a preset descaling duration to ensure sufficient reaction of the scale and the descaling agent and to ensure the descaling effect.

[0033] In some embodiments, the steam oven further comprises: a second temperature sensor arranged in the cavity and configured to detect a temperature in the cavity; a back heating pipe arranged at a back of the cavity and configured to heat food in the cavity; a bottom heating pipe arranged at a bottom of the cavity and configured to heat food in the cavity; and a controller electrically connected with the second temperature sensor, the back heating pipe and the bottom heating pipe, wherein the controller is configured to: control the back heating pipe to start heating after starting to execute the cooking program; control the bottom heating pipe to start heating when the steam generator is paused; and control the back heating pipe and the bottom heating pipe to stop heating when the temperature detected by the second temperature sensor is greater than the target cooking temperature.

[0034] As can be seen from the above embodiments, it takes a certain time for the steam generator to heat water to boiling, and at this time, the temperature in the cavity of the steam oven cannot be quickly increased. Therefore, the back heating pipe and the bottom heating pipe can be turned on to quickly reach the target cooking temperature in the cavity. When the steam generator is paused, the bottom heating pipe is controlled to start heating, which can make the heating of food in the cavity more uniform, and avoid the back heating pipe and the bottom heating pipe being heated for a long time, which can cause the temperature in the cavity to be too high and is not conducive to the control of the temperature in the cavity.

[0035] In a second aspect, the embodiments of the present application provide a control method applied to the steam oven in the first aspect, and the method comprises:

[0036] starting a cooking program set by a user, the cooking program comprising a target cooking temperature; and obtaining, according to a preset correspondence, a circulating water amount corresponding to the target cooking temperature and a first time length and a second time length corresponding to the circulating water amount;

[0037] controlling the steam generator and the water inlet pump to work periodically in a case that the steam generator has an initial water amount of water during execution of the cooking program;

[0038] wherein, in each heating period, the steam generator is controlled to work for the first time length, then paused for the second time length, and after the steam generator is paused for the second time length, the water inlet pump is controlled to draw the circulating water amount of water into the steam generator according to the water amount of the steam generator detected by the flow meter.

[0039] In a third aspect, the embodiments of the present application provide a controller, comprising: one or more processors; and one or more memories, wherein the one or more memories are configured to store computer program codes, the computer program codes comprising computer instructions, and when the one or more processors execute the computer instructions, the controller executes the control method provided in the second aspect.

[0040] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, which comprises computer instructions. When the computer instructions are controlled on a computer, the computer executes the method provided in the second aspect and possible implementation manners.

[0041] In a fifth aspect, the embodiments of the present application provide a computer program product, which can be directly loaded into a memory and contains software codes. The computer program product can realize the method provided in the second aspect and possible implementation manners after being loaded and executed by a computer.

[0042] It should be noted that the computer instructions described above can be stored on the computer readable storage medium in whole or in part. The computer readable storage medium can be packaged together with the processor of the controller or packaged separately from the processor of the controller, and the present application does not limit this.

[0043] The beneficial effects of the second aspect to the fifth aspect described in the present application can be analyzed with reference to the beneficial effects of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, and are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0045] Figure 1 A structural schematic diagram of a steaming oven provided by the embodiments of the present application is shown in FIG. 1;

[0046] Figure 2 A hardware structure schematic diagram of a controller provided by the embodiments of the present application is shown in FIG. 2;

[0047] Figure 3 A structural schematic diagram of another steaming oven provided by the embodiments of the present application is shown in FIG. 3;

[0048] Figure 4 A structural schematic diagram of another steaming oven provided by the embodiments of the present application is shown in FIG. 4;

[0049] Figure 5 A structural schematic diagram of another steaming oven provided by the embodiments of the present application is shown in FIG. 5;

[0050] Figure 6 A structural schematic diagram of another steaming oven provided by the embodiments of the present application is shown in FIG. 6;

[0051] Figure 7 A structural schematic diagram of another steaming oven provided by the embodiments of the present application is shown in FIG. 7;

[0052] Figure 8Another structural schematic view of the steam oven provided by the embodiment of the present application is provided.

[0053] Figure 9 A flowchart of a control method of the steam oven provided by the embodiment of the present application is provided.

[0054] Figure 10 Another hardware structure schematic view of the controller provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0056] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0058] The term "and / or" in this paper is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone.

[0059] In the description of the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, when describing the pipeline, the "connected" and "connected" used in the present application have the meaning of conducting. The specific meaning needs to be understood in conjunction with the context.

[0060] The terms "including", "containing", "having" and their conjugates, as used throughout the description herein, shall be understood to be open-ended, i.e., meaning that "including", "containing", "having", and the like, permit for events that would otherwise impede a procedure, method, system, product or apparatus to be claimed, but are not precluded by such events.

[0061] In addition, the words "example" and "exemplary" are used herein to mean serving as an instance or illustration. Any implementation described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Rather, use of the terms "example" and "exemplary" is intended to present concepts in a concrete manner.

[0062] As described in the background, steam ovens are increasingly favored by users as a kind of kitchen appliance that can achieve both baking and steaming. However, in the existing steam ovens, the water inflow in the steam generator cannot be accurately controlled. If the water inflow is too much, the food will be wet, affecting the steaming effect; if the water inflow is too little, the amount of generated steam will be insufficient, affecting the cooking efficiency, and even possibly causing the steam generator to dry out, which poses a certain safety hazard.

[0063] In view of this, the embodiments of the present application provide a steam oven that can accurately control the water inflow. In the case of ensuring that there is an initial amount of water in the steam generator, the water pump is controlled to continuously draw the circulating water amount of water into the steam generator, and the steam generator is paused after working for a first time length, which serves as a heating period. In one heating period, the circulating water amount of water will be completely converted into water vapor by the steam generator, thereby achieving accurate control of the water inflow.

[0064] To further describe the technical solutions of the embodiments of the present application, as shown in Figure 1 FIG. 1 is a structural diagram of a steam oven provided by the embodiments of the present application.

[0065] Referring to Figure 1 , the steam oven 1 includes a cabinet 101, a water storage tank 102, a water inflow pipeline 103, a water inflow pump 104, a flow meter 105, a steam generator 106, a first steam pipeline 107, a water-steam separator 108, a second steam pipeline 109, and a controller 110 (not shown in the figure).

[0066] In some embodiments, the cabinet 101 is used to protect the electrical elements inside the steam oven 1, and is internally provided with a cavity for placing food materials. Exemplarily, the cabinet 101 can be approximately a cuboid as shown in Figure 1 , or can be other shapes.

[0067] In some embodiments, the water storage tank 102 is horizontally arranged on the top outside of the cavity for storing water.

[0068] In some embodiments, the first interface of the water inlet pipeline 103 is connected with the water storage tank 102, and the second interface is communicated with the opening on the bottom of the steam generator 106, so that the water in the water storage tank 102 can enter the steam generator 106 through the water inlet pipeline 103.

[0069] In some embodiments, the third interface of the water inlet pipeline 103 is communicated with the opening on the bottom of the water vapor separator 108, so that the water in the water storage tank 102 can enter the water vapor separator 108 through the water inlet pipeline 103. And since the third interface and the third interface of the water inlet pipeline 103 are the ports of different straight pipes of the water inlet pipeline 103, that is, the third interface and the third interface are communicated, so the steam generator 106 and the water vapor separator 108 form a communication device. In this way, the water drawn into the water vapor separator 108 can keep the amount of water in the steam generator 106 stable, so as to deliver a stable amount of steam into the cavity.

[0070] In some embodiments, the water inlet pump 104 is arranged on the water inlet pipeline 103 for pumping the water in the water storage tank 102 into the steam generator 106 and the water vapor separator 108.

[0071] In some embodiments, the flow meter 105 is arranged on the water inlet pipeline 103 for detecting the amount of water entering the steam generator 106 and the water vapor separator 108.

[0072] In some embodiments, the steam generator 106 is used to heat the water from the water storage tank 102 to boiling to generate steam.

[0073] Optionally, the steam generator 106 can be vertically arranged on the back outside of the cavity.

[0074] In some embodiments, the first steam pipeline 107 communicates the steam generator 106 and the water vapor separator 108, for delivering the steam generated in the steam generator 106 into the water vapor separator 108.

[0075] In some embodiments, the water vapor separator 108 is communicated with the cavity through the second steam pipeline 109, for carrying out gas-liquid separation on the water vapor from the steam generator 106, so as to deliver the separated water vapor into the cavity through the second steam pipeline 109.

[0076] In some embodiments, the interface of the water vapor separator 108 connected with the second steam pipeline 109 is higher than the interface of the water vapor separator 108 connected with the first steam pipeline 107, so that the water vapor can more easily enter the cavity.

[0077] Optionally, the water vapor separator 108 can be vertically arranged at the back of the cavity, and the top end of the water vapor separator 108 can be higher than the top end of the steam generator 106.

[0078] In some embodiments, as shown in Figure 2 The controller 110 is electrically connected with the water inlet pump 104, the flow meter 105, the steam generator 106, and the water vapor separator 108, for generating operation control signals according to instruction operation codes and timing signals, to instruct the steam oven 1 to execute control instructions.

[0079] For example, the controller 110 can be a central processing unit (CPU), a general processor network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller 110 can also be other devices with processing functions, such as circuits, devices, or software modules, and the embodiments of the present application do not make any limitation thereto.

[0080] In some embodiments, as shown in Figure 3 The steam oven 1 further comprises a drain pipeline 111 and a drain pump 112, wherein, as shown in Figure 2 The drain pump 112 is electrically connected with the controller 110.

[0081] In some embodiments, the first end of the drain pipeline 111 is in communication with the water storage tank 102, and the second end is in communication with the steam generator 106, and then the water vapor separator 108 is in communication with the drain pipeline 111 through the first steam pipeline 107 and the steam generator 106.

[0082] In some embodiments, the drain pump 112 is arranged on the drain pipeline 111, for pumping water in the steam generator 106 and the water vapor separator 108 to the water storage tank 102.

[0083] In some embodiments, as shown in Figure 4 The steam oven 1 further comprises a first temperature sensor 113 arranged in the steam generator 106, for detecting the temperature of the steam generator 106. As shown in Figure 2 The first temperature sensor 113 is electrically connected with the controller 110.

[0084] In some embodiments, as shown in Figure 5 The steam oven 1 further comprises a water hardness detector 114 arranged in the water storage tank 102, for detecting the hardness of water in the water storage tank 102. As shown inFigure 2 As shown, the water hardness detector 114 is electrically connected with the controller 110.

[0085] In some embodiments, as shown, the steam oven 1 further comprises a second temperature sensor 115, a back heating pipe 116 and a bottom heating pipe 117. Figure 6

[0086] As shown, the second temperature sensor 115, the back heating pipe 116 and the bottom heating pipe 117 are electrically connected with the controller 110. Figure 2

[0087] In some embodiments, the second temperature sensor 115 is arranged inside the cavity for detecting the temperature inside the cavity.

[0088] In some embodiments, the back heating pipe 116 is arranged at the bottom of the inner side of the cavity for heating the foodstuff inside the cavity.

[0089] In some embodiments, the bottom heating pipe 117 is arranged at the back of the inner side of the cavity for heating the foodstuff inside the cavity.

[0090] In some embodiments, as shown, the steam oven 1 further comprises a display panel 118, an operation panel 119, a voice device 120 and a communicator 121 (not shown in the figure). Figure 7

[0091] As shown, the display panel 118, the operation panel 119, the voice device 120 and the communicator 121 are electrically connected. Figure 2

[0092] In some embodiments, the display panel 118 can be a liquid crystal display panel, an organic light-emitting diode (OLED) display panel. The specific type, size and resolution of the display panel are not limited. The display panel can be used to display the control panel of the steam oven 1, and the steam oven 1 can feedback the current working state of the steam oven 1 through the display panel 118. For example, the steam oven 1 is in a preheating state, a baking state or a tender baking state, etc.

[0093] Optionally, as shown, the display panel 118 displays one or more of the following: the cooking program (including the target cooking temperature, the circulating water amount, the first time length and the second time length, etc.) selected by the user, the open / closed state of the steam oven door, the open / closed state of the water storage tank detected by the water storage tank detection switch, the temperature inside the cavity and the water amount of the water storage tank 102. Figure 8

[0094] ​​​​​In some embodiments, the operation panel 119 has function buttons. Exemplarily, the function buttons include on-off button, mode selection button, temperature selection button, + (increase) button, - (decrease) button, etc. In this way, the user can interact with the steam oven 1 through the operation panel 119 to adjust the mode, temperature, etc. of the steam oven 1.

[0095] In some embodiments, the voice device 120 is configured to issue prompt information. Exemplarily, when the accumulated water amount is greater than the descaling water amount, the voice device 120 issues prompt information for prompting the user to trigger the descaling program. For another example, after the drainage pump 112 finishes draining, the voice device 120 issues information for prompting the user to clean the water storage tank, put in clean water, and put in descaling agent.

[0096] In some embodiments, the communicator is configured to communicate with external devices or external servers according to various communication protocol types. For example, the pot communicator can include at least one of a Wi-Fi chip, a Bluetooth communication protocol chip, a wired Ethernet communication protocol chip, other network communication protocol chip or near field communication protocol chip, and an infrared receiver.

[0097] In some embodiments, the communicator 121 is electrically connected with the temperature sensors, and can receive the temperature values detected by the temperature sensors and send the temperature values to external devices, such as the user's terminal device.

[0098] It can be understood that the structure shown in the embodiments of the present application does not constitute a specific limitation on the steam oven. In other embodiments of the present application, the steam oven can include more or fewer components than shown, or combine certain components, or split certain components, or different component arrangements. The components shown can be implemented in hardware, software, or a combination of software and hardware.

[0099] The specific schemes of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the execution subject of the control method of the steam oven provided below can be the steam oven or a controller in the steam oven.

[0100] As shown in Figure 9 The present application provides a control method of a steam oven, which can include the following steps:

[0101] S101, start the cooking program set by the user, and obtain the circulating water amount corresponding to the target cooking temperature and the first time length and the second time length corresponding to the circulating water amount according to a preset correspondence.

[0102] The cooking program includes a target cooking temperature.

[0103] In some embodiments, the circulating water amount corresponding to different target cooking temperatures is different, so that the steam generator can generate steam that meets the target cooking temperature. The first duration and the second duration corresponding to different circulating water amounts are different, and the values of the first duration and the second duration are fixed values, so that the steam amount meeting the target cooking temperature can be generated in each heating period, and the heating duration meets the target cooking duration.

[0104] For example, when the set range of the target cooking temperature is [T1, T2], the first duration is A1 and the second duration is B1; when the set range of the target cooking temperature is [T2, T3], the first duration is A2 and the second duration is B2. Wherein, A1+B1=A2+B2.

[0105] S102, during the execution of the cooking program, under the condition that the steam generator has an initial water amount, the steam generator and the water inlet pump are controlled to work periodically.

[0106] Wherein, in each heating period, after the steam generator is controlled to work for a first duration, the steam generator is paused for a second duration, and after the steam generator is paused for the second duration, the water inlet pump is controlled to draw circulating water amount of water into the steam generator according to the water inlet amount of the steam generator detected by the flow meter.

[0107] For example, when the target temperature in the cooking program is within the range of [T1, T2] and the steam generator has an initial water amount, the steam generator is controlled to work for a heating duration A1, pause for a heating duration B1, draw C1 amount of water, work for a heating duration A1 again, pause for a heating duration B1, and draw C1 amount of water, so that the steam generator and the water inlet pump are controlled to work periodically.

[0108] During the working process of the steam generator, the water in the steam generator is converted into water vapor, and the water vapor liquefies and releases heat after reaching the cavity, so that the food materials in the cavity are cooked. Because the amount of water vapor generated by the steam generator affects the cooking speed of the food materials and also affects the taste of the food materials, controlling the generation amount of steam in the steam generator can effectively ensure the cooking effect.

[0109] Figure 9The embodiments shown at least bring the following beneficial effects: by arranging the flow meter on the water inlet pipeline, the water inlet amount of the steam generator can be accurately detected to control the water inlet amount in each heating cycle as the circulating water amount. In the case that the steam generator has an initial water amount, the steam generator can directly control the heating of the initial water amount, thereby avoiding dry burning. By controlling the steam generator and the water inlet action after each heating cycle completes heating and pauses heating, the steam generator can accurately control the steam amount. The circulating water amount drawn into the steam generator in each heating cycle corresponds to the target cooking temperature in the cooking program, so that the water vapor generated by the circulating water amount in each heating cycle can meet the heating demand of the target cooking temperature. Meanwhile, the first duration (i.e., the heating duration) during which the steam generator continuously works and the second duration (i.e., the pause heating duration) during which the steam generator pauses work correspond to the circulating water amount, so that the circulating water amount can be completely heated and converted into water vapor in the first duration, thereby accurately controlling the water vapor in the cavity to ensure the cooking effect.

[0110] In some embodiments, as shown in Figure 9 The method provided by the embodiments of the present application also includes the following steps:

[0111] S103, when the duration of the cooking program reaches the target cooking duration, the cooking program is controlled to end, and the drain pump is controlled to draw the water in the steam generator and the water vapor separator back into the water storage tank.

[0112] As can be seen from the above embodiments, by controlling the drain pump to draw the residual water in the steam generator and the water vapor separator back into the water storage tank at the end of the cooking program, it can be ensured that the steam generator, the water vapor separator and the water inlet pipeline are all in a water-free state after the cooking program ends. On the one hand, this can reduce the generation of scale and avoid clogging the steam generator, the water vapor separator and the water inlet pipeline. On the other hand, it can avoid the deterioration of residual water and affect the effect of the next cooking.

[0113] In some embodiments, the method provided by the embodiments of the present application also includes the following steps:

[0114] S100, before controlling the steam generator and the water inlet pump to work periodically, the water inlet pump is controlled to draw an initial water amount of water into the steam generator and the water separator.

[0115] The initial water amount is greater than a first preset water amount and less than or equal to a second preset water amount. The first preset water amount is the sum of the water amount when the steam generator is dry burning and the water amount consumed by the steam generator in the first duration for the first time. The second preset water amount is a water amount that is half of the sum of the volumes of the steam generator and the water vapor separator.

[0116] As can be known from the above embodiment, the water vapor separator can be communicated with the steam generator through the water inlet pipeline, and thus the water drawn into the water vapor separator can keep the water amount in the steam generator stable, so as to deliver a stable amount of steam into the cavity. Since the steam generator is in a water-free state when the cooking program is started, dry burning will occur if heating is performed at this time, and there is a certain safety hazard. Therefore, before the steam generator and the water pump are controlled to work periodically, the initial water amount of water needs to be stored in the steam generator to prevent dry burning from occurring. In order to prevent dry burning, the initial water amount of water is not less than the first preset water amount, that is, the sum of the water at the dry burning level and the water consumed by the steam generator in the first heating period. In order to avoid the longer time required for heating the water to boiling due to the more water amount, the initial water amount is less than the second preset amount, that is, the water amount of half the sum of the steam generator and the water vapor separator. In this way, the rapid generation of water vapor can be ensured, and the cooking efficiency can be improved while ensuring the cooking safety.

[0117] In some embodiments, the embodiments of the present application also provide a control method of a steam oven, which can include:

[0118] S201, acquiring a temperature value of the steam generator detected by a first temperature sensor.

[0119] S202, when the temperature value is greater than a water replenishment temperature value, controlling a water pump to draw an initial water amount of water into the steam generator and the water separator.

[0120] The water replenishment temperature value represents a temperature value when the steam generator is dry burning.

[0121] As can be known from the above embodiment, since the temperature of the steam generator when dry burning occurs is greater than the temperature when normally working, when it is detected that the temperature of the first temperature sensor is greater than the water replenishment temperature value, it indicates that the water in the steam generator has been completely evaporated, and there is a possibility of dry burning. At this time, the water pump needs to be controlled to draw a certain amount of water into the steam generator. Since the water in the steam generator is in a water-free state after being completely evaporated, the same as when the steam oven is turned on, the initial water amount of water can be drawn into the steam generator, that is, dry burning can be prevented, and the cooking efficiency can be improved.

[0122] In some embodiments, the embodiments of the present application also provide a control method of a steam oven, which can include:

[0123] S301, determining a descaling water amount of triggering a descaling program according to water hardness detected by a water hardness detector.

[0124] For example, when the water hardness ranges from 60 to 120 ppm, the descaling water amount is X; when the water hardness ranges from 120 to 180 ppm, the descaling water amount is Y; and when the water hardness is greater than 181 ppm, the descaling water amount is Z.

[0125] S302, determining the cumulative water amount since the last time the steam generator executes the descaling program according to the water amount detected by the flow meter.

[0126] S303, issuing the first prompt information when the cumulative water amount is greater than the descaling water amount.

[0127] The first prompt information is used to prompt the user to trigger the descaling program.

[0128] For example, when the water hardness ranges from 60 to 120 ppm, the steam generator sends information to the user to prompt the user to trigger the descaling program when the cumulative water amount since the last time the steam generator executes the descaling program is greater than X.

[0129] Since the steam generator produces scale during the process of heating water, the scale not only causes the steam generator, the water vapor separator, the water inlet pipeline and the drain pipeline to be blocked, but also affects the service life of the steam oven. Since the amount of scale produced by water of different hardness is different, the frequency of descaling is also different. As can be seen from the above embodiment, different users use the steam oven, and the hardness of the water put into the water storage tank is different, so the frequency of executing the descaling program is also different. The water hardness detector can detect the hardness of the water put into the water storage tank by the user, and different water hardness ranges correspond to different descaling water amounts. When the flow meter detects that the cumulative water amount is greater than the descaling water amount, it means that the content of scale in the steam oven has reached the standard that needs to be descaled, at this time, the user can be prompted to issue prompt information to prompt the user to trigger the descaling program in time, so as to avoid affecting the cooking efficiency of the steam oven.

[0130] In some embodiments, the application also provides a control method of a steam oven, which can include:

[0131] S401, determining the average temperature value of the steam generator according to the temperature value of the steam generator in the working process detected by the first temperature sensor.

[0132] S402, issuing the first prompt information when the difference between the average temperature value and the reference temperature value is greater than the preset difference value.

[0133] The first prompt information is used to prompt the user to trigger the descaling program, and the reference temperature value is determined according to the temperature data of the steam generator when the controller executes the cooking program for the first time.

[0134] In some embodiments, since the temperature of the steam generator detected after reaching the water replenishment temperature value is higher than the temperature data of the steam generator when the water level is normal, the temperature value after reaching the water replenishment temperature value is excluded from the determination data of the reference temperature.

[0135] As can be seen from the above embodiments, when the steam oven first executes the cooking program, there is no scale in the steam generator at this time, and the temperature data at this time can be used as the reference temperature. Since the temperature of the steam generator with scale is higher than that of the steam generator without scale when working, when the difference between the average temperature value of the steam generator and the reference temperature value is greater than the preset difference value, it indicates that the content of the scale in the steam oven has reached the standard that needs to be descaled, at this time, a prompt information can be sent to the user to prompt the user to start the descaling program in time to avoid affecting the cooking efficiency of the steam oven.

[0136] In some embodiments, the application also provides a control method of a steam oven, which can include:

[0137] S501, in response to the descaling instruction, controlling the drainage pump to work to drain the water in the steam generator and the water vapor separator.

[0138] S502, after the drainage pump finishes draining, sending a second prompt information.

[0139] The second prompt information includes information for prompting the user to clean the water storage tank, put in clean water, and put in the descaling agent.

[0140] S503, acquiring the switching state of the water storage tank through the water storage tank detection switch.

[0141] S504, after detecting that the water storage tank is switched from the open state to the closed state, controlling the water inlet pump to draw in a third preset water amount of water into the steam generator and the water vapor separator.

[0142] The third preset water amount is the sum of the water amounts that the steam generator and the water vapor separator can hold.

[0143] In this way, the scale in the steam generator and the water vapor separator can be contacted with the descaling agent to react chemically.

[0144] S505, after a preset descaling time length, controlling the drainage pump to drain.

[0145] In this way, the scale and the descaling agent can be ensured to fully react, and the descaling effect is guaranteed.

[0146] S506, after the drainage pump finishes draining, performing a preset number of cleaning operations.

[0147] The cleaning operation is an operation of cleaning the steam generator and the water-vapor separator by alternately operating the water inlet pump and the water outlet pump.

[0148] As can be seen from the above embodiment, the descaling procedure is to fully react the descaling agent with the water scale in the steam generator, the water-vapor separator and the pipeline to remove the water scale. Therefore, when the descaling procedure is performed, the water in the steam oven needs to be completely drained, and then the water with the descaling agent is pumped in. After the descaling agent reacts with the water scale, the steam generator, the water-vapor separator and the pipeline are flushed. The amount of water with the descaling agent can be the sum of the amounts of water that the steam generator and the water-vapor separator can hold. In this way, the water scale in the steam generator and the water-vapor separator can be contacted with the descaling agent to react chemically. Since the reaction of the descaling agent with the water scale needs time, the steam generator, the water-vapor separator and the pipeline can be flushed after a preset descaling time to ensure the full reaction of the water scale with the descaling agent and ensure the descaling effect.

[0149] In some embodiments, the application also provides a control method of the steam oven, which can include:

[0150] S601, after starting to perform the cooking procedure, control the back heating pipe to start heating.

[0151] S602, when the steam generator is paused, control the bottom heating pipe to start heating.

[0152] S603, when the temperature value detected by the second temperature sensor is greater than the target cooking temperature, control the back heating pipe and the bottom heating pipe to stop heating.

[0153] As can be seen from the above embodiment, the steam generator needs a certain time to heat the water to boiling, and at this time, the temperature in the cavity of the steam oven cannot be quickly increased. Therefore, the back heating pipe and the bottom heating pipe can be turned on to quickly reach the target cooking temperature in the cavity. When the steam generator is paused, the bottom heating pipe is controlled to start heating. On the one hand, the heating of the food in the cavity is more uniform, and on the other hand, the back heating pipe and the bottom heating pipe are not heated at the same time for a long time, which avoids the temperature in the cavity being too high and is not conducive to the control of the temperature in the cavity.

[0154] It can be seen that the above mainly introduces the scheme provided by the embodiments of the present application from the method aspect. To implement the above functions, the embodiments of the present application provide corresponding hardware structures and / or software modules for implementing each function. Those skilled in the art should easily realize that, in combination with the modules and algorithm steps of the examples described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0155] The embodiments of the present application can divide the functional modules of the controller according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated in one processing module. The above integrated module can be implemented in the form of hardware or software functional module. Optionally, the division of the modules in the embodiments of the present application is illustrative, and is only a logical functional division. Actual implementation can have another division manner.

[0156] The embodiments of the present application also provide a hardware structure schematic diagram of a controller, as shown in Figure 10 The controller 110 further includes a processor 1101, and optionally further includes a memory 1102 and a communication interface 1103 connected with the processor 1101. The processor 1101, the memory 1102 and the communication interface 1103 are connected through a bus 1104.

[0157] The processor 1101 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The processor 1101 can also be any other device with processing function, such as a circuit, a device or a software module. The processor 1101 can also include multiple CPUs, and the processor 1101 can be a single-CPU processor or a multi-CPU processor. The processor herein can refer to one or more devices, circuits or processing cores for processing data (for example, computer program instructions).

[0158] The memory 1102 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of storing desired program code in the form of instructions or data structures and that can be accessed by a computer, without any limitation on the present embodiments. The memory 1102 can exist independently or be integrated with the processor 1101. The memory 1102 can contain computer program code. The processor 1101 is configured to execute the computer program code stored in the memory 1102, thereby implementing the control method provided by the present embodiments.

[0159] The communication interface 1103 can be configured to communicate with other devices or communication networks (e.g., an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), etc.). The communication interface 1103 can be a module, a circuit, a transceiver, or any device capable of communication.

[0160] The bus 1104 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 1104 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 10 Only one thick line is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0161] The present embodiments also provide a computer-readable storage medium, which includes computer-executable instructions, when running on a computer, causing the computer to execute any of the control methods of the steam oven provided by the above embodiments.

[0162] The embodiment of the present application further provides a computer program product comprising computer execution instructions, which, when executed on a computer, causes the computer to execute the control method of the steam oven provided by any of the above embodiments.

[0163] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by using software, the implementation can be in the form of a computer program product. The computer program product includes one or more computer execution instructions. When the computer execution instructions are loaded and executed on a computer, the whole or part of the processes or functions according to the embodiments of the present application are produced. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer execution instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer execution instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or data storage device including one or more servers, data centers, etc. integrated with the medium. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)), etc.

[0164] Although the present application is described herein in conjunction with various embodiments, other variations of the disclosed embodiments can be understood and implemented by those skilled in the art through viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. Some measures described in mutually different dependent claims can be combined and produce a good result.

[0165] Although the present application has been described in connection with certain specific features and embodiments thereof, it is to be understood that it is intended to cover all modifications and variations of this application which are within the scope of the appended claims and their equivalents. Accordingly, the description and drawings are to be regarded as illustrative in nature and not as restrictive.

[0166] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A steam oven, characterized by The application relates to a steam cooking device, comprising: a box body internally provided with a cavity for placing food materials; a water storage tank mounted outside the box body and used for storing water; a steam generator in communication with the water storage tank through a water inlet pipeline, wherein a water inlet pump and a flow meter are arranged on the water inlet pipeline, the water inlet pump is used for pumping water in the water storage tank into the steam generator, and the flow meter is used for detecting the water inlet amount of the steam generator; and the steam generator is used for heating water from the water storage tank to boiling; a water vapor separator in communication with the steam generator through a first steam pipeline and in communication with the cavity through a second steam pipeline, and used for carrying out gas-liquid separation on water vapor from the steam generator, wherein separated water vapor is transported into the cavity through the second steam pipeline; a controller electrically connected with the steam generator, the water inlet pump and the flow meter; the controller is configured to: start a cooking program set by a user, the cooking program comprising a target cooking temperature; and according to a preset corresponding relationship, obtain a circulating water amount corresponding to the target cooking temperature and a first time length and a second time length corresponding to the circulating water amount; in a case that the steam generator has an initial water amount during execution of the cooking program, periodically control the steam generator and the water inlet pump to work; wherein in each heating cycle, after the steam generator works for the first time length, the working is paused for the second time length, and after the steam generator works for the second time length, according to the water inlet amount of the steam generator detected by the flow meter, the water inlet pump is controlled to pump the circulating water amount of water into the steam generator; the water vapor separator is also in communication with the water storage tank through the water inlet pipeline, and the controller is further configured to: before the steam generator and the water inlet pump are controlled to periodically work, the water inlet pump is controlled to pump the initial water amount of water into the steam generator and the water separator, the initial water amount is greater than a first preset water amount and less than or equal to a second preset water amount; wherein the first preset water amount is the sum of the water amount when dry burning of the steam generator occurs and the water amount consumed by the steam generator for the first time in the first time length; and the second preset water amount is the water amount of half of the sum of the volumes of the steam generator and the water vapor separator.

2. The steam oven according to claim 1, characterized in that further comprising: a drainage pump arranged on a drainage pipeline, one end of the drainage pipeline being connected with the water storage tank and the other end being in communication with the steam generator and the water vapor separator, and the drainage pump being used for pumping water in the steam generator and the water vapor separator into the water storage tank; the controller is electrically connected with the drainage pump, and the controller is further configured to: when the time length of the cooking program reaches the target cooking time length, the cooking program is controlled to end, and the drainage pump is controlled to pump water in the steam generator and the water vapor separator back into the water storage tank.

3. The steam oven according to claim 1 or 2, characterized in that further comprising a first temperature sensor arranged in the steam generator and used for detecting the temperature of the steam generator; the controller is electrically connected with the first temperature sensor, and the controller is further configured to: acquire a temperature value of the steam generator detected by the first temperature sensor; when the temperature value is greater than a water replenishment temperature value, control the water inlet pump to draw the initial amount of water into the steam generator and the water separator, the water replenishment temperature value representing a temperature value when the steam generator is dry-burned.

4. The steam oven according to claim 2, characterized in that a water hardness detector arranged in the water storage tank and configured to detect a hardness of water in the water storage tank, different water hardness ranges corresponding to different descaling water amounts; the controller is electrically connected with the water hardness detector, and the controller is further configured to: determine a descaling water amount for triggering a descaling program according to the water hardness detected by the water hardness detector; determine a cumulative water intake amount of the steam generator after the controller last executes the descaling program according to the water intake amount detected by the flow meter; when the cumulative water intake amount is greater than the descaling water amount, issue a first prompt information, the first prompt information being used to prompt a user to trigger the descaling program.

5. The steam oven according to claim 2, characterized in that, a first temperature sensor arranged in the steam generator and configured to detect a temperature of the steam generator; the controller is electrically connected with the first temperature sensor, and the controller is further configured to: determine an average temperature value of the steam generator according to a temperature value of the steam generator in a working process detected by the first temperature sensor; when a difference between the average temperature value and a reference temperature value is greater than a preset difference value, issue a first prompt information, the first prompt information being used to prompt a user to trigger a descaling program, the reference temperature value being determined according to temperature data of the steam generator when the controller first executes the cooking program.

6. The steam oven according to claim 1 or 2, characterized in that, a water storage tank detection switch arranged on the water storage tank and configured to detect an opening and closing state of the water storage tank; the controller is electrically connected with the water storage tank detection switch, and the controller is further configured to: in response to a descaling instruction, control the water drainage pump to work to drain water in the steam generator and the water separator; after the water drainage pump finishes draining water, issue a second prompt information, the second prompt information including information used to prompt a user to clean the water storage tank, put in clean water, and put in a descaling agent; acquire the opening and closing state of the water storage tank through the water storage tank detection switch; after detecting that the water storage tank is switched from an open state to a closed state, control the water inlet pump to draw a third preset amount of water into the steam generator and the water separator, the third preset amount of water being a sum of water amounts that the steam generator and the water separator can hold; after a preset descaling time elapses, control the water drainage pump to drain water; after the water drainage pump finishes draining water, perform a preset number of cleaning operations, the cleaning operation being an operation of cleaning the steam generator and the water separator by controlling the water inlet pump and the water drainage pump to work alternately.

7. The steam oven according to claim 1, characterized in that, further comprising: a second temperature sensor arranged in the cavity and configured to detect a temperature in the cavity; a back heating pipe arranged at a back of the cavity and configured to heat food in the cavity; a bottom heating pipe arranged at a bottom of the cavity and configured to heat the food material in the cavity; the controller is electrically connected with the second temperature sensor, the back heating pipe and the bottom heating pipe, and the controller is further configured to: control the back heating pipe to start heating after starting to execute the cooking program; control the bottom heating pipe to start heating when the steam generator stops working; control the back heating pipe and the bottom heating pipe to stop heating when the temperature value detected by the second temperature sensor is greater than the target cooking temperature.

8. A control method of a steam oven, applied to the steam oven according to any one of claims 1-7, characterized in that, comprise: starting a user-set cooking program, the cooking program comprising a target cooking temperature; and, according to a preset correspondence relationship, obtaining a circulating water amount corresponding to the target cooking temperature and a first time length and a second time length corresponding to the circulating water amount; during execution of the cooking program, in a case where the steam generator has an initial water amount of water, controlling the steam generator and the water inlet pump to work periodically; wherein, in each heating cycle, after controlling the steam generator to work for the first time length, the steam generator is controlled to stop working for the second time length, and after the steam generator stops working for the second time length, according to the water inlet amount of the steam generator detected by the flow meter, the water inlet pump is controlled to draw the circulating water amount of water into the steam generator; before controlling the steam generator and the water inlet pump to work periodically, the water inlet pump is controlled to draw the initial water amount of water into the steam generator and the water separator, the initial water amount being greater than a first preset water amount and less than or equal to a second preset water amount; wherein, the first preset water amount is the sum of the water amount when the steam generator is dry burning and the water amount consumed by the steam generator for the first time in the first time length; and the second preset water amount is the water amount of half of the sum of the volume of the steam generator and the water vapor separator.

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