Steam generating device and control method thereof

Abstract

The invention provides a steam generation device and a control method thereof, particularly relates to the technical field of household appliances, and is used for reasonably determining the water inflow of the steam generation device. The steam generating device comprises a body; a steam generating part; a temperature sensor; the controller is configured to obtain the current temperature value, detected by the temperature sensor, of the steam generation part in response to the steam heating instruction; based on the target temperature value and the current temperature value, the duration of the water supplementing period and the target water supplementing amount are determined, and the target water supplementing amount is the water supplementing amount preset in one water supplementing period; the target water supplementing amount is updated based on the historical temperature value and the current temperature value every water supplementing period, and water of the updated target water supplementing amount is supplemented into the steam generation part; the historical temperature value is determined based on the temperature upper limit values of the first n water supplementing periods, the current temperature value is the temperature upper limit value in a plurality of temperature values detected by the temperature sensor in the current water supplementing period, and n is a positive integer.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a steam generating device and a control method thereof. Background Art

[0002] A steam generator is a device that utilizes thermal energy from other energy sources to heat water into steam. Currently, steam generators are widely used in household appliances such as steam ovens, dishwashers, and range hoods.

[0003] However, during operation, the water intake of the steam generator may not match the amount of water evaporated. When the water intake is greater than the amount of water evaporated, it may cause water overflow in the steam generator. When the water intake is less than the actual amount of water evaporated, it may cause dry burning and damage the steam generator.

[0004] Therefore, how to determine the water intake of the steam generating device is an urgent problem to be solved. Summary of the invention

[0005] The embodiment of the present application provides a steam generating device and a control method thereof, which are used to reasonably determine the water intake of the steam generating device.

[0006] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0007] In a first aspect, a steam generating device is provided, comprising:

[0008] A body having a water inlet and a steam outlet;

[0009] A steam generating part, used for heating liquid water into water vapor, wherein an output end of the steam generating part is connected to a steam outlet;

[0010] A temperature sensor, used to detect the temperature value of the steam generating part;

[0011] The controller is configured as:

[0012] In response to a steam heating instruction, obtaining a current temperature value of the steam generating part detected by a temperature sensor, wherein the steam heating instruction includes a target temperature value that the steam generating part needs to reach;

[0013] Based on the target temperature value and the current temperature value, determine the duration of the water replenishment cycle and the target water replenishment amount, where the target water replenishment amount is the preset water replenishment amount within a water replenishment cycle;

[0014] At each water replenishment cycle, the target water replenishment amount is updated based on the historical temperature value and the current temperature value, and the water of the updated target water replenishment amount is replenished into the steam generating part; the historical temperature value is determined based on the temperature upper limit value of the previous n water replenishment cycles, and the current temperature value is the temperature upper limit value among the multiple temperature values ​​detected by the temperature sensor in the current water replenishment cycle, and n is a positive integer.

[0015] The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: the embodiment of the present application determines the duration of the water replenishment cycle and the target water replenishment amount according to the target temperature value and the current temperature value, so that the water in the steam generating part is at a reasonable water level after the steam generating device replenishes the target water replenishment amount of water in each water replenishment cycle. At the same time, the present application also takes into account that during the operation of the steam generating device, the steam generation speed in the steam generating part may be inconsistent with the steam generation speed in the steam heating instruction. Continuing to replenish water with the target water replenishment amount may cause too much water in the steam generating part, causing the water in the steam generating device to overflow, or too little water in the steam generating part, causing the steam generating device to dry burn. Since the historical temperature value and the current temperature value can reflect the heating speed and steam generation speed of the steam generating device, the embodiment of the present application also updates the target water replenishment amount based on the historical temperature value and the current temperature value at each interval of the water replenishment cycle, so that the updated target water replenishment amount can meet the current steam generation speed. Replenishing the updated target water replenishment amount of water in the steam generating part can avoid the situation where the steam generating device overflows due to too much water, and can also avoid the situation where the steam generating device is too little water and causes dry burning.

[0016] In some embodiments, the controller executes an update of the target water replenishment amount based on the historical temperature value and the current temperature value, and is specifically configured as follows: when the difference between the current temperature value and the historical temperature value is above the first preset value and below the second preset value, the updated target water replenishment amount is determined to be the difference between the target water replenishment amount and the first water amount.

[0017] It can be seen from the above embodiments that when the difference between the current temperature value and the historical temperature value is above the first preset value and below the second preset value, it means that the gap between the current temperature value and the historical temperature value is small, the heating speed of the steam generating device tends to be stable, and the amount of steam generated in the steam generating device is small. At this time, if the steam generating part continues to be replenished with the target water replenishment amount, the target water replenishment amount may be greater than the amount of water consumed in the steam generating part to generate steam, so that more and more water in the steam generating part overflows. In response to this, the embodiment of the present application reduces the first amount of water on the basis of the target water replenishment amount, so that the updated target water replenishment amount is less than the previous target water replenishment amount, thereby avoiding water overflow in the steam generating part.

[0018] In some embodiments, the controller is further specifically configured to: when the difference between the current temperature value and the historical temperature value is above a second preset value, determine the updated target water replenishment amount as the sum of the target water replenishment amount and the second water amount.

[0019] It can be seen from the above embodiments that when the difference between the current temperature value and the historical temperature value is above the second preset value, it means that the gap between the current temperature value and the historical temperature value is large, the heating speed of the steam generating device is gradually increasing, and the demand for the amount of steam generated in the steam generating device is increasing. At this time, if the steam generating part continues to be replenished with the target water replenishment amount, the target water replenishment amount may be less than the amount of water consumed in the steam generating part to generate steam, so that the water in the steam generating part becomes less and less, and dry burning occurs. In response to this, the embodiment of the present application adds a second amount of water on the basis of the target water replenishment amount, so that the updated target water replenishment amount is greater than the previous target water replenishment amount, thereby avoiding dry burning in the steam generating part.

[0020] In some embodiments, the historical temperature value is an average of the upper temperature limits of the previous n water replenishment cycles.

[0021] In some embodiments, the controller is further configured to: determine the difference between the actual water replenishment amount and the target water replenishment amount when the actual water replenishment amount in the previous water replenishment cycle is below the target water replenishment amount; and replenish the steam generating part with water of the difference in the current water replenishment cycle.

[0022] It can be seen from the above embodiments that, under voltage instability or other abnormal conditions, the actual water replenishment amount in the previous water replenishment cycle may not reach the target water replenishment amount, and the actual water amount in the steam generating part is less than the preset water amount. Therefore, in the current water replenishment cycle, additional water of the difference water amount is added to the steam generating part to avoid dry burning in the steam generating part.

[0023] In some embodiments, the controller is further configured to: when the current temperature value is above the dry-boiling temperature value, add additional water to the steam generating part, and the additional water amount is above the target water amount.

[0024] It can be seen from the above embodiments that when the current temperature value is above the dry-boiling temperature value, the amount of water in the steam generating device is less than when the current temperature value is below the dry-boiling temperature value. In this regard, the present application adds an additional amount of water to the steam generating part when the current temperature value is above the dry-boiling temperature value to avoid dry-boiling of the steam generator.

[0025] In a second aspect, an embodiment of the present application provides a method for controlling a steam generating device, the method comprising:

[0026] In response to a steam heating instruction, obtaining a current temperature value of a steam generating part in a steam generating device, wherein the steam heating instruction includes a target temperature value that the steam generating part needs to reach;

[0027] Based on the target temperature value and the current temperature value, determine the duration of the water replenishment cycle and the target water replenishment amount, where the target water replenishment amount is the preset water replenishment amount within a water replenishment cycle;

[0028] At each water replenishment cycle, the target water replenishment amount is updated based on the historical temperature value and the current temperature value, and the water of the updated target water replenishment amount is replenished into the steam generating part; the historical temperature value is determined based on the temperature upper limit value of the previous n water replenishment cycles, and the current temperature value is the temperature upper limit value among the multiple temperature values ​​detected in the current water replenishment cycle, and n is a positive integer.

[0029] In a third aspect, an embodiment of the present application provides a controller comprising: one or more processors; one or more memories; wherein the one or more memories are used 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 of the steam generating device provided in the second aspect.

[0030] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which includes computer instructions. When the computer instructions are controlled on a computer, the computer executes the control method of the steam generating device provided in the second aspect and possible implementation methods.

[0031] In a fifth aspect, an embodiment of the present invention provides a computer program product, which can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the control method of the steam generating device provided in the second aspect and possible implementation methods.

[0032] It should be noted that the above computer instructions may be stored in whole or in part on a computer-readable storage medium, wherein the computer-readable storage medium may be packaged together with the processor of the controller, or may be packaged separately from the processor of the controller, which is not limited in this application.

[0033] The beneficial effects described in the second to fifth aspects of the present application can be referred to the beneficial effect analysis of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0035] Figure 1 A schematic diagram of a normal temperature curve of a steam generating device provided in an embodiment of the present application when no dry burning occurs;

[0036] Figure 2 A schematic diagram of an abnormal temperature curve when a steam generating device provided in an embodiment of the present application does not experience dry burning;

[0037] Figure 3 A schematic diagram of an abnormal temperature curve when dry burning occurs in a steam generating device provided in an embodiment of the present application under low voltage conditions;

[0038] Figure 4 A schematic diagram of a steam generating device provided in an embodiment of the present application Figure 1 ;

[0039] Figure 5 A schematic diagram of a steam generating device provided in an embodiment of the present application Figure 2 ;

[0040] Figure 6 A schematic diagram of a steam generating device provided in an embodiment of the present application Figure 3 ;

[0041] Figure 7 A schematic diagram of a steam generating device provided in an embodiment of the present application Figure 4 ;

[0042] Figure 8 A schematic diagram of a steam generating device provided in an embodiment of the present application Figure 5 ;

[0043] Fig. 9 A schematic diagram of a steam generating device provided in an embodiment of the present application Figure 6 ;

[0044] Fig.10 A schematic diagram of the hardware structure of a controller provided in an embodiment of the present application;

[0045] Fig.11 A flow chart of a control method for a steam generating device provided in an embodiment of the present application Figure 1 ;

[0046] Fig.12 A flow chart of a control method for a steam generating device provided in an embodiment of the present application Figure 2 ;

[0047] Fig.13 A flow chart of a control method for a steam generating device provided in an embodiment of the present application Figure 3 . DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0051] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0052] The terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0053] In addition, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0054] As described in the background art, a steam generating device is a device that utilizes heat energy from other energy sources to heat water into steam. Currently, steam generating devices are widely used in household appliances such as steam ovens, dishwashers, and range hoods.

[0055] However, during operation, the amount of water entering the steam generator may not match the amount of water evaporated. When the amount of water entering is greater than the amount of water evaporated, it may cause water overflow in the steam generator. When the amount of water entering is less than the actual amount of water evaporated, it may cause dry burning, causing damage to the steam generator. In the related art, whether the steam generator has the possibility of dry burning is often determined by whether the maximum temperature value of the steam generator reaches the dry burning judgment temperature. However, it is not possible to accurately determine whether dry burning occurs based on the maximum temperature value of the steam generator.

[0056] For example, Figure 1 This is a schematic diagram of a normal temperature curve of a steam generating device without dry burning in this application. Figure 1 It can be seen that when the steam generator does not dry burn, the maximum temperature of the steam generator is between 120 degrees Celsius and 132 degrees Celsius, and does not exceed the dry burning judgment temperature of 156 degrees Celsius.

[0057] Figure 2 FIG. 1 is a schematic diagram of an abnormal temperature curve of a steam generating device when dry burning does not occur in the present application. Figure 2 It can be seen that when dry burning does not occur but the temperature curve is abnormal, the maximum temperature of the steam generator exceeds 170 degrees Celsius, which exceeds the dry burning judgment temperature of 156 degrees Celsius. That is, in abnormal circumstances, the steam generator does not dry burn, but because the maximum temperature of the steam generator exceeds the dry burning judgment temperature, it may be misjudged as dry burning.

[0058] Figure 3 FIG. 1 is a schematic diagram of an abnormal temperature curve of a steam generating device when dry burning occurs under low voltage conditions, as shown in the present application. Figure 3 It can be seen that at low voltage, the temperature when dry burning occurs is between 130 degrees Celsius and 150 degrees Celsius, which does not reach the dry burning judgment temperature of 156 degrees Celsius. That is, in abnormal circumstances, the steam generating device has dry burning, but because the maximum temperature value of the steam generating device does not exceed the dry burning judgment temperature, it may be misjudged as not having dry burning.

[0059] Therefore, how to determine the water intake of the steam generating device is an urgent problem to be solved.

[0060] In view of this, the embodiment of the present application determines the duration of the water replenishment cycle and the target water replenishment amount according to the target temperature value and the current temperature value, so that after the steam generator is replenished with the target water replenishment amount of water in each water replenishment cycle, the water in the steam generating part is at a reasonable water level. At the same time, the present application also takes into account that during the operation of the steam generating device, the steam generation speed in the steam generating part may be inconsistent with the steam generation speed in the steam heating instruction. Continuing to replenish water with the target water replenishment amount may result in too much water in the steam generating part, causing the water in the steam generating device to overflow, or too little water in the steam generating part, causing the steam generating device to dry burn.

[0061] Since the historical temperature value and the current temperature value can reflect the heating speed and steam generation speed of the steam generating device, the embodiment of the present application also updates the target water replenishment amount based on the historical temperature value and the current temperature value at each water replenishment cycle, so that the updated target water replenishment amount can meet the current steam generation speed. Adding the updated target water replenishment amount of water to the steam generating part can avoid overflow caused by too much water in the steam generating device, and can also avoid dry burning caused by too little water in the steam generating device.

[0062] Among them, the steam generating device provided in the embodiment of the present application can also be called a steam generator, which can be used in electrical appliances that provide steam heating, such as steam ovens, dishwashers, or range hoods. The embodiment of the present application does not impose specific restrictions on this.

[0063] To further describe the technical solution of the embodiment of the present application, Figure 4 Shown is a structural diagram of a steam generating device 1 provided in an embodiment of the present application. The present application is described by taking a steam generating device in a steam oven as an example.

[0064] Reference Figure 4 The steam generating device 1 comprises a body 10, and the body 10 has a water inlet 101 and a steam outlet 102. The water inlet 101 is connected to a water source, and water from the water source flows into the steam generating device 1 through the water inlet 101. The steam outlet 102 is connected to a heating chamber of an electrical appliance where the steam generating device 1 is located, and the steam generated in the steam generating device 1 is output to the heating chamber of the electrical appliance where the steam generating device 1 is located through the steam outlet 102.

[0065] In some embodiments, the steam generating device 1 further includes a temperature sensor 20 for detecting a temperature value of the steam generating portion 30 .

[0066] In some embodiments, the steam generating device 1 further includes a steam generating unit 30 for heating liquid water into water vapor, and an output end of the steam generating unit 30 is connected to the steam outlet 102 .

[0067] Optional, such as Figure 5As shown, the steam generating part 30 may include a water storage tank 301 , one end of which is in communication with the water inlet 101 , for storing water flowing out of the water inlet 101 in the water tank 301 for use by the steam generating part 30 .

[0068] Optional, such as Figure 6 As shown, the steam generating unit 30 may further include a heating element 302 for heating the water in the water storage tank 301 so that the liquid water is heated to steam. The heating element 302 is connected to the water storage tank 301 through a pipeline. The material of the heating element 302 is usually stainless steel or alloy steel to ensure that it is resistant to high temperature, corrosion and easy to clean. The power of the heating element 302 directly affects the steam generation speed of the steam generating unit 30.

[0069] Optional, such as Figure 7 As shown, the steam generating part 30 may further include a water pump 303 for pumping water in the water storage tank 301 into the heating element 302. The water pump 303 is disposed on a pipeline between the water storage tank 301 and the heating element 302.

[0070] Optional, such as Figure 8 As shown, the steam generating part 30 may further include a steam conduit 304, which is used to transport the water vapor generated by the heating element 302 through the steam outlet 102 to the heating chamber of the electrical appliance where the steam generating device 1 is located, thereby achieving the purpose of steam heating.

[0071] Optional, such as Fig. 9 As shown, the steam generating part 30 may further include a water level sensor 305 , which is disposed in the water tank and is used to detect the water level of the liquid in the water tank 201 .

[0072] In some embodiments, the steam generating device 1 further includes a controller 40, and the controller 40 is used to perform the following steps S101-S103:

[0073] S101. In response to a steam heating instruction, obtain a current temperature value of a steam generating part detected by a temperature sensor.

[0074] The steam heating instruction includes the duration and amount of water replenishment cycles corresponding to multiple temperature differences. When determining the target water replenishment amount, the water replenishment cycle and target water replenishment amount corresponding to the difference can be obtained based on the temperature difference between the target temperature value and the current temperature value and the preset corresponding relationship.

[0075] As another possible implementation, a preset correspondence is stored in a cloud server that is in communication with the controller, and the correspondence includes a correspondence between the duration of the water replenishment cycle and the water replenishment amount corresponding to multiple temperature differences. When determining the target water replenishment amount, the water replenishment cycle and the target water replenishment amount corresponding to the difference can be obtained according to the difference between the target temperature value and the current temperature value and the correspondence.

[0076] Optionally, after determining the water replenishment cycle and the target water replenishment amount, the target water replenishment amount of water is replenished into the steam generating part every water replenishment cycle.

[0077] Exemplarily, when the water replenishment cycle is 30 seconds and the target water replenishment amount is 5 ml, 5 ml of water needs to be replenished into the steam generating device every 30 seconds.

[0078] S103. At each water replenishment cycle, the target water replenishment amount is updated based on the historical temperature value and the current temperature value, and water of the updated target water replenishment amount is replenished into the steam generating part.

[0079] The historical temperature value is determined based on the upper temperature limit values ​​of the previous n water replenishment cycles, where n is a positive integer.

[0080] Optionally, the historical temperature value is an average of the upper temperature limits of the previous n water replenishment cycles.

[0081] The embodiment of the present application determines the duration of the water replenishment cycle and the target water replenishment amount according to the target temperature value and the current temperature value, so that after the steam generator is replenished with the target water replenishment amount of water in each water replenishment cycle, the water in the steam generating part is at a reasonable water level. At the same time, the present application also takes into account that during the operation of the steam generating device, the steam generation speed in the steam generating part may be inconsistent with the steam generation speed in the steam heating instruction. Continuing to replenish water with the target water replenishment amount may cause too much water in the steam generating part, causing the water in the steam generating device to overflow, or too little water in the steam generating part, causing the steam generating device to dry burn. Since the historical temperature value and the current temperature value can reflect the heating speed and steam generation speed of the steam generating device, the embodiment of the present application also updates the target water replenishment amount based on the historical temperature value and the current temperature value at each interval of the water replenishment cycle, so that the updated target water replenishment amount can meet the current steam generation speed. Replenishing the updated target water replenishment amount of water in the steam generating part can avoid the situation where the steam generating device overflows due to too much water, and can also avoid the situation where the steam generating device is dry burn due to too little water.

[0082] In some embodiments, the controller 40 is further configured to determine the updated target water replenishment amount as the difference between the target water replenishment amount and the first water amount when the difference between the current temperature value and the historical temperature value is above the first preset value and below the second preset value.

[0083] The first preset value and the second preset value may be set by a developer at the factory.

[0084] Exemplarily, the first preset value may be kd in degrees Celsius, the second preset value may be ki in degrees Celsius, and ki>kd, and ki and kd are constants.

[0085] It can be seen from the above embodiments that when the difference between the current temperature value and the historical temperature value is above the first preset value and below the second preset value, it means that the gap between the current temperature value and the historical temperature value is small, the heating speed of the steam generating device tends to be stable, and the amount of steam generated in the steam generating device is small. At this time, if the steam generating part continues to be replenished with the target water replenishment amount, the target water replenishment amount may be greater than the amount of water consumed in the steam generating part to generate steam, so that more and more water in the steam generating part overflows. In response to this, the embodiment of the present application reduces the first amount of water on the basis of the target water replenishment amount, so that the updated target water replenishment amount is less than the previous target water replenishment amount, thereby avoiding water overflow in the steam generating part.

[0086] In some embodiments, the controller 40 is further configured to determine, when the difference between the current temperature value and the historical temperature value is above a second preset value, that the updated target water replenishment amount is the sum of the target water replenishment amount and the second water amount.

[0087] It can be seen from the above embodiments that when the difference between the current temperature value and the historical temperature value is above the second preset value, it means that the gap between the current temperature value and the historical temperature value is large, the heating speed of the steam generating device is gradually increasing, and the demand for the amount of steam generated in the steam generating device is increasing. At this time, if the steam generating part continues to be replenished with the target water replenishment amount, the target water replenishment amount may be less than the amount of water consumed in the steam generating part to generate steam, so that the water in the steam generating part becomes less and less, and dry burning occurs. In response to this, the embodiment of the present application adds a second amount of water on the basis of the target water replenishment amount, so that the updated target water replenishment amount is greater than the previous target water replenishment amount, thereby avoiding dry burning in the steam generating part.

[0088] In some embodiments, the controller 40 is also used to obtain the current water level detected by the water level sensor after determining that the updated target water replenishment amount is the sum of the target water replenishment amount and the second water amount; when the current water level is above the preset water level, the updated target water replenishment amount is determined to be the target water replenishment amount.

[0089] The preset water level may be a preset water level in the current water replenishment cycle when water is replenished at a target water replenishment amount.

[0090] It can be seen from the above embodiments that when the current water level is above the preset water level, it means that the water level in the steam generating part has returned to normal. If water is continuously replenished with the updated target water replenishment amount, an additional second amount of water will be replenished, which may cause overflow.

[0091] In some embodiments, the controller 40 is also used to determine the difference between the actual water replenishment amount and the target water replenishment amount when the actual water replenishment amount in the previous water replenishment cycle is below the target water replenishment amount; and replenish the steam generating part with water of the difference in the current water replenishment cycle.

[0092] It can be seen from the above embodiments that, under voltage instability or other abnormal conditions, the actual water replenishment amount in the previous water replenishment cycle may not reach the target water replenishment amount, and the actual water amount in the steam generating part is less than the preset water amount. Therefore, in the current water replenishment cycle, additional water of the difference water amount is added to the steam generating part to avoid dry burning in the steam generating part.

[0093] In some embodiments, the controller 40 is further configured to determine the updated target water replenishment amount as the difference between the target water replenishment amount and the third water amount if the temperature upper limits of the m water replenishment cycles before the current water replenishment cycle are all within the preset temperature range, where m is a positive integer.

[0094] It can be seen from the above embodiment that when the temperature upper limit values ​​of the first m water replenishment cycles of the current water replenishment cycle are within the preset temperature range, the heating speed of the steam generating device tends to be stable, and the amount of steam generated in the steam generating device is relatively small. At this time, if the target water replenishment amount continues to be added to the steam generating part, the target water replenishment amount may be greater than the amount of water consumed in the steam generating part to generate steam, thereby causing more and more water in the steam generating part to overflow. In response to this, the embodiment of the present application reduces the third amount of water on the basis of the target water replenishment amount, so that the updated target water replenishment amount is less than the previous target water replenishment amount, thereby avoiding water overflow in the steam generating part.

[0095] In some embodiments, the controller 40 is further configured to determine a preset heating duty cycle of the steam generating part based on a difference between the current temperature value and the target temperature value, and control the steam generating part to operate at the preset heating duty cycle.

[0096] As a possible implementation, the difference between the target temperature value and the current temperature value and the corresponding relationship with the heating duty cycle are stored in a memory connected to the controller 40. According to the difference between the target temperature value and the current temperature value and the corresponding relationship, a preset heating duty cycle corresponding to the difference can be obtained.

[0097] In other embodiments, the controller 40 is further configured to determine a preset heating duty cycle of the steam generating unit based on the target temperature value and the preset heating duration, wherein the steam heating instruction includes the preset heating duration required for the steam generating unit to reach the target temperature value.

[0098] As a possible embodiment of this case, the correspondence between the target temperature value, the preset heating time and the heating duty cycle is stored in a memory connected to the controller 40 for communication, and the preset heating duty cycle of the steam generating unit can be determined according to the target temperature value and the preset heating time in the steam heating instruction.

[0099] In some embodiments, Fig.10 As shown, the heating element 302, the water pump 303 and the water level sensor 305 are electrically connected to the controller 40. The controller 40 refers to a device that can generate an operation control signal according to the instruction operation code and the timing signal to instruct the steam generating device 1 to execute the control instruction. Exemplarily, the controller 40 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The controller can also be other devices with processing functions, such as circuits, devices or software modules, and the embodiments of the present application do not impose any restrictions on this.

[0100] In some embodiments, the controller 40 may be a microcontroller unit (MCU). MCU, also known as a single chip microcomputer or single chip microcomputer, is a chip-level computer that appropriately reduces the frequency and specifications of a central processing unit and integrates peripheral interfaces such as memory, timers, and even LCD driver circuits on a single chip to provide different combination controls for different applications.

[0101] In addition, the controller can be used to control the operation of various components in the steam generating device 1 , so that the various components of the steam generating device 1 operate to achieve various predetermined functions of the steam generating device 1 .

[0102] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the steam generating device. In other embodiments of the present application, the steam generating device may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0103] The present application also provides a control method for a steam generating device, which is applied to a controller of the steam generating device or a controller connected to the steam generating device in communication, such as Fig.11 As shown, the method comprises the following steps:

[0104] S1. In response to a steam heating instruction, obtaining a current temperature value of a steam generating part detected by a temperature sensor.

[0105] The steam heating instruction includes a target temperature value that the steam generating unit needs to reach.

[0106] S2. Determine the duration of the water replenishment cycle and the target water replenishment amount based on the target temperature value and the current temperature value.

[0107] Among them, the target water replenishment amount is the preset water replenishment amount within a water replenishment cycle.

[0108] Optionally, the water replenishment cycle and the target water replenishment amount are determined based on the difference between the target temperature value and the current temperature value.

[0109] As a possible implementation, a memory connected to the controller in communication stores the difference between the target temperature value and the current temperature value, and the corresponding relationship between the duration of the water replenishment cycle and the amount of water replenishment. According to the difference between the target temperature value and the current temperature value, a table can be looked up to obtain the water replenishment cycle and target water replenishment amount corresponding to the difference.

[0110] As another possible implementation, the cloud server connected to the controller in communication stores the difference between the target temperature value and the current temperature value, and the corresponding relationship between the duration of the water replenishment cycle and the amount of water replenishment. According to the difference between the target temperature value and the current temperature value, the water replenishment cycle and the target water replenishment amount corresponding to the difference can be obtained by looking up the table.

[0111] S3. At each water replenishment cycle, the target water replenishment amount is updated based on the historical temperature value and the current temperature value, and water of the updated target water replenishment amount is replenished into the steam generating part.

[0112] Among them, the historical temperature value is determined based on the temperature upper limit values ​​of the previous n water replenishment cycles, the current temperature value is the temperature upper limit value among multiple temperature values ​​detected by the temperature sensor in the current water replenishment cycle, and n is a positive integer.

[0113] Optionally, the historical temperature value is an average of the upper temperature limits of the previous n water replenishment cycles.

[0114] The value of n can be set by the developer at the factory or by the user. For example, n can be 3.

[0115] Fig.11 The embodiment shown at least brings the following beneficial effects: the embodiment of the present application determines the duration of the water replenishment cycle and the target water replenishment amount according to the target temperature value and the current temperature value, so that the water in the steam generating part is at a reasonable water level after the steam generating device replenishes the target water replenishment amount of water in each water replenishment cycle. At the same time, the present application also takes into account that during the operation of the steam generating device, the steam generation speed in the steam generating part may be inconsistent with the steam generation speed in the steam heating instruction. Continuing to replenish water with the target water replenishment amount may cause too much water in the steam generating part, causing the water in the steam generating device to overflow, or too little water in the steam generating part, causing the steam generating device to dry burn. Since the historical temperature value and the current temperature value can reflect the heating speed and steam generation speed of the steam generating device, the embodiment of the present application also updates the target water replenishment amount based on the historical temperature value and the current temperature value at each interval of the water replenishment cycle, so that the updated target water replenishment amount can meet the current steam generation speed. Replenishing the updated target water replenishment amount of water in the steam generating part can avoid the situation where the steam generating device overflows due to too much water, and can also avoid the situation where the steam generating device is dry burn due to too little water.

[0116] In some embodiments, the above step S3 can be specifically implemented as follows: when the difference between the current temperature value and the historical temperature value is above the first preset value and below the second preset value, determining the updated target water replenishment amount as the difference between the target water replenishment amount and the first water amount.

[0117] In some embodiments, the above step S3 can also be specifically implemented as follows: when the difference between the current temperature value and the historical temperature value is above a second preset value, determining the updated target water replenishment amount as the sum of the target water replenishment amount and the second water amount.

[0118] In some embodiments, after determining that the updated target water replenishment amount is the sum of the target water replenishment amount and the second water amount, the current water level detected by the water level sensor is obtained; when the current water level is above the preset water level, the updated target water replenishment amount is determined to be the target water replenishment amount.

[0119] The preset water level may be a preset water level in the current water replenishment cycle when water is replenished at a target water replenishment amount.

[0120] In some embodiments, the above step S3 can be specifically implemented as follows: when the temperature upper limits of the m water replenishment cycles before the current water replenishment cycle are all within the preset temperature range, determining the updated target water replenishment amount as the difference between the target water replenishment amount and the third water amount.

[0121] Wherein, m is a positive integer.

[0122] In some embodiments, the control method of the steam generating device provided in the present application may further include the following steps: when the actual water replenishment amount in the previous water replenishment cycle is lower than the target water replenishment amount, determining the difference between the actual water replenishment amount and the target water replenishment amount; and replenishing the steam generating part with water of the difference in the current water replenishment cycle.

[0123] In some embodiments, the control method of the steam generating device provided in the present application may further include the following steps: when the current temperature value is above the dry-burning temperature value, additional water replenishment is added to the steam generating part, and the additional water replenishment amount is above the target water replenishment amount.

[0124] It can be seen from the above embodiments that when the current temperature value is above the dry-boiling temperature value, the amount of water in the steam generating device is less than when the current temperature value is below the dry-boiling temperature value. In this regard, the present application adds an additional amount of water to the steam generating part when the current temperature value is above the dry-boiling temperature value to avoid dry-boiling of the steam generator.

[0125] In some embodiments, the control method of the steam generating device provided in the present application may further include the following steps: determining a preset heating duty cycle of the steam generating part based on the difference between the current temperature value and the target temperature value, and controlling the steam generating part to operate at the preset heating duty cycle.

[0126] In other embodiments, the control method of the steam generating device provided in the present application may further include the following steps: determining a preset heating duty cycle of the steam generating unit based on the target temperature value and the preset heating duration, wherein the steam heating instruction includes the preset heating duration required for the steam generating unit to reach the target temperature value.

[0127] Fig.12 A flow chart of a control method for a steam generating device provided in this application is shown as follows: Fig.12 As shown, after the steam generating device starts to execute the steam heating program, it performs the following steps:

[0128] After starting the steam heating process, the steam generating unit is pre-cleaned.

[0129] After the steam generating device is pre-cleaned, an initial amount of water is added to the steam generating part.

[0130] After an initial amount of water is added into the steam generating part, the steam generating part operates according to a preset heating duty cycle.

[0131] Get the current temperature value Tmax, historical temperature value Tmav and dry-burning temperature value Tlimit.

[0132] Determine whether Tmax is greater than Tlimit. If Tmax is greater than Tlimit, determine whether the cumulative water intake Wt in the current water replenishment cycle reaches the preset water intake Wti;

[0133] If the cumulative water intake Wt in the current water replenishment cycle does not reach the preset water intake Wti, the water replenishment amount W in the next water replenishment cycle is W=Wn+Wa, where Wn is the target water replenishment amount and Wa is the additional water replenishment amount.

[0134] If the cumulative water intake Wt in the current water replenishment cycle reaches the preset water intake Wti, the water replenishment amount W in the next water replenishment cycle = Wn.

[0135] If Tmax is less than or equal to Tlimit, and Tmax is greater than (Tmav+kd) and less than (Tmav+ki), the water replenishment amount W of the next water replenishment cycle is W=Wn-A, where A is the first water amount.

[0136] If Tmax is less than or equal to Tlimit, and Tmax is greater than or equal to (Tmav+ki), then determine whether the cumulative water intake Wt in the current water replenishment cycle reaches the preset water intake Wti;

[0137] If the cumulative water intake Wt in the current water replenishment cycle does not reach the preset water intake Wti, the water replenishment amount W in the next water replenishment cycle is W=Wn+Wa, where Wn is the target water replenishment amount and Wa is the additional water replenishment amount.

[0138] If the cumulative water intake Wt in the current water replenishment cycle reaches the preset water intake Wti, the water replenishment amount W in the next water replenishment cycle is W=Wn+B, where B is the second water amount.

[0139] If Tmax is less than or equal to Tlimit, and Tmax is less than (Tmav+kd), the water replenishment amount W in the next water replenishment cycle is Wn.

[0140] It is determined whether the working time of the steam generating device reaches the preset working time. If not, the steam generating device continues to work according to the preset heating duty cycle.

[0141] If not, evacuate the water in the steam generating section.

[0142] Fig.13 A flow chart of another control method for a steam generating device provided in the present application is as follows: Fig.13As shown, after the steam generating device starts to execute the steam heating program, it performs the following steps:

[0143] After the steam heating program is started, the cycle working time Td=0, and the steam generating part starts to work.

[0144] After the steam generating unit starts to work, determining whether the cycle working time Td of the steam generating unit reaches the preset heating time;

[0145] If the cycle working time of the steam generating part does not reach the preset heating time, the steam generating device is controlled to continue to determine whether the working time of the steam generating part reaches the preset heating time;

[0146] If the cycle working time of the steam generating part reaches the preset heating time, the cycle working time Td is set to 0, and the target water replenishment amount of water is added to the steam generating part.

[0147] After the steam generating unit starts to work, it is determined whether the temperature value Ta currently detected by the steam generating unit is greater than the temperature peak value Tm during the periodic working time;

[0148] When the temperature value detected by the steam generating part is greater than the temperature peak value during the periodic operation duration, the currently detected temperature value Ta is set as the temperature peak value Tm during the periodic operation duration.

[0149] When the temperature value detected by the steam generating part is less than or equal to the temperature peak value in the periodic operation duration, it is further determined whether the temperature value detected by the steam generating part is greater than the temperature peak value in the periodic operation duration.

[0150] It can be seen that the above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. To achieve the above functions, the embodiment of the present application provides a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily appreciate that, in combination with the modules and algorithm steps of each example described in the embodiment disclosed herein, the embodiment of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0151] The embodiment of the present application can divide the controller into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. Optionally, the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0152] An embodiment of the present application further provides a computer-readable storage medium, comprising computer-executable instructions, which, when executed on a computer, enable the computer to execute any one of the control methods for a steam generating device provided in the above embodiments.

[0153] An embodiment of the present application further provides a computer program product including computer executable instructions, which, when executed on a computer, enables the computer to execute any one of the control methods for a steam generating device provided in the above embodiments.

[0154] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer-executable instructions. When the computer-executable instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer-executable 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-executable instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more servers that can be integrated with the medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0155] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0156] Although the present application is described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0157] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A steam generating device, characterized in that: include: A body having a water inlet and a steam outlet; A steam generating part, used for heating liquid water into water vapor, wherein the output end of the steam generating part is connected to the steam outlet; A temperature sensor, used to detect the temperature value of the steam generating part; The controller is configured as: In response to a steam heating instruction, acquiring a current temperature value of the steam generating part detected by the temperature sensor, the steam heating instruction including a target temperature value that the steam generating part needs to reach; Based on the target temperature value and the current temperature value, determining the duration of the water replenishment cycle and the target water replenishment amount, wherein the target water replenishment amount is a preset water replenishment amount within the water replenishment cycle; At each interval of the water replenishment cycle, the target water replenishment amount is updated based on the historical temperature value and the current temperature value, and the water of the updated target water replenishment amount is replenished into the steam generating part; The historical temperature value is determined based on the upper temperature limits of the first n water replenishment cycles, the current temperature value is the upper temperature limit among the multiple temperature values ​​detected by the temperature sensor in the current water replenishment cycle, and n is a positive integer.

2. The steam generating device according to claim 1, characterized in that: The controller executes the updating of the target water replenishment amount based on the historical temperature value and the current temperature value, and is specifically configured as follows: When the difference between the current temperature value and the historical temperature value is above a first preset value and below a second preset value, the updated target water replenishment amount is determined to be the difference between the target water replenishment amount and the first water amount.

3. The steam generating device according to claim 2, characterized in that: The controller executes the updating of the target water replenishment amount based on the historical temperature value and the current temperature value, and is further specifically configured as follows: When the difference between the current temperature value and the historical temperature value is above a second preset value, the updated target water replenishment amount is determined to be the sum of the target water replenishment amount and the second water amount.

4. The steam generating device according to claim 1, characterized in that: The historical temperature value is the average value of the upper temperature limits of the previous n water replenishment cycles.

5. The steam generating device according to claim 1, characterized in that: The controller is also configured to: When the actual water replenishment amount in the previous water replenishment cycle is lower than the target water replenishment amount, determining the difference between the actual water replenishment amount and the target water replenishment amount; The differential amount of water is replenished into the steam generating part during the current water replenishment cycle.

6. The steam generating device according to claim 1, characterized in that: The controller is also configured to: When the current temperature value is above the dry-boiling temperature value, an additional amount of water is added to the steam generating part, and the additional amount of water is above the target amount of water.

7. A method for controlling a steam generating device, characterized in that: The method comprises: In response to a steam heating instruction, obtaining a current temperature value of a steam generating part in the steam generating device, wherein the steam heating instruction includes a target temperature value that the steam generating part needs to reach; Based on the target temperature value and the current temperature value, determining the duration of the water replenishment cycle and the target water replenishment amount, wherein the target water replenishment amount is a preset water replenishment amount within the water replenishment cycle; At each water replenishment cycle, the target water replenishment amount is updated based on the historical temperature value and the current temperature value, and the water of the updated target water replenishment amount is replenished into the steam generating part; the historical temperature value is determined based on the temperature upper limit values ​​of the previous n water replenishment cycles, and the current temperature value is the temperature upper limit value among the multiple temperature values ​​detected in the current water replenishment cycle, and n is a positive integer.

8. The method according to claim 7, characterized in that The updating of the target water replenishment amount based on the historical temperature value and the current temperature value includes: When the difference between the current temperature value and the historical temperature value is above a first preset value and below a second preset value, the updated target water replenishment amount is determined to be the difference between the target water replenishment amount and the first water amount.

9. The method according to claim 8, characterized in that The updating of the target water replenishment amount based on the historical temperature value and the current temperature value further includes: When the difference between the current temperature value and the historical temperature value is above a second preset value, the updated target water replenishment amount is determined to be the sum of the target water replenishment amount and the second water amount.

10. The method according to claim 9, characterized in that The historical temperature value is the average value of the upper temperature limits of the previous n water replenishment cycles.

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