Steam cooking equipment and water shortage detection method thereof, computer equipment and storage medium

Abstract

The invention relates to the technical field of steam cooking equipment, particularly provides steam cooking equipment and a water shortage detection method thereof, computer equipment and a storage medium, and aims to solve one of the problems that a water shortage detection method of existing steam cooking equipment is high in cost and not timely in detection. The water shortage detection method of the steam cooking equipment comprises the following steps: acquiring a time interval between two adjacent water inlet operations under the condition that the water inlet amount and the water inlet time length of unit time length are the same; comparing the time interval with a preset time interval threshold value; and judging whether the water box is short of water or not at least based on a comparison result of the time interval and the preset time interval threshold value. According to the water shortage detection method, the water shortage state of the water box can be detected in a simple, rapid and low-cost mode, a special water level detection device does not need to be arranged for the water box, and the space in the water box does not need to be additionally occupied.

Description

Technical Field

[0001] The present invention relates to the technical field of steam cooking devices, and specifically provides a steam cooking device, a water shortage detection method therefor, a computer device, and a storage medium. Background Art

[0002] Household steam cooking devices such as steam ovens and steam combination ovens mostly use an evaporation pan or a steam generator to generate steam. The evaporation pan and the steam generator are usually connected to a water tank, and the water tank is used to supply water to the evaporation pan or the steam generator during the steam generation process. During the steam generation process, there may be a situation where the evaporation pan or the steam generator is short of water and needs to be replenished, and there may also be a situation where the water tank is short of water and needs to be replenished. If the water shortage problem cannot be detected in time, it will affect the steam generation, and thus affect the cooking effect.

[0003] In the prior art, the patent document with the publication number of CN115844223A provides a water shortage detection method for a water tank, specifically by detecting whether there is sufficient water in the water tank through a water level detector provided in the water tank or by detecting the current of a water pump. However, the water level detector is expensive and also occupies the internal space of the water tank, reducing the capacity of the water tank, thereby increasing the frequency of users adding water and reducing the user experience; and the method of detecting the current of the water pump is only applicable to the situation where the water body in the water tank is emptied and the water pump runs dry. At this time, the water tank is already severely short of water or even has no water, which has an adverse impact on steam generation and reduces the cooking effect.

[0004] Correspondingly, there is a need in the art for a new water shortage detection method to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problems, that is, to solve at least one of the problems of high cost and untimely detection of the existing water shortage detection methods for steam cooking devices.

[0006] In a first aspect, the present invention provides a water shortage detection method for a steam cooking device. The steam cooking device is provided with a water tank and a steam generating device, and the water tank is connected to the steam generating device to supply water into the steam generating device. The water shortage detection method includes: obtaining the time interval between two adjacent water inlet operations in the case where the water inlet volume and the water inlet duration in a unit time are the same; comparing the time interval with a preset time interval threshold; and determining whether the water tank is short of water at least based on the comparison result between the time interval and the preset time interval threshold.

[0007] The water shortage detection method provided by the present invention determines whether the water box is short of water by comparing the time interval between two adjacent water inlet operations with a preset time interval threshold. It utilizes the principle that after the water box is short of water during the experiment, the water inlet frequency will increase. Thus, the detection of the water shortage state of the water box is realized in a simple, fast and low-cost manner, without setting a dedicated water level detection device for the water box, nor occupying additional space inside the water box, ensuring the maximization of the water capacity of the water box. Therefore, it is not necessary for the user to add water frequently, which is beneficial to improving the user experience. In addition, by combining the water shortage detection of the steam generating device, the water shortage state of the steam cooking device can be obtained more comprehensively, so as to better ensure the steam generation process and then ensure the cooking effect.

[0008] In some feasible embodiments of the above water shortage detection method for a steam cooking device, the "judging whether the water box is short of water at least based on the comparison result between the time interval and the preset time interval threshold" includes:

[0009] If the time interval is less than or less than or equal to the preset time interval threshold, it is judged that the water box is short of water; or

[0010] If the time interval is greater than or equal to or greater than the preset time interval threshold, it is judged that the water box is not short of water.

[0011] It can be understood that if the time interval is less than or less than or equal to the preset time interval, it indicates that the actual water inlet volume is less than the water inlet volume under normal circumstances (sufficient water volume). Furthermore, it can be inferred that the water volume in the water box is insufficient and in a water shortage state at this time.

[0012] It should be noted that in order to improve the accuracy of the judgment result, it can be to obtain two or even more consecutive time intervals and then compare them with the preset time interval threshold respectively. When there are consecutive multiple cases where the time interval is less than or less than or equal to the preset time interval, it is judged that the water box is in a water shortage state, and the judgment result at this time is more accurate and reliable.

[0013] In some feasible embodiments of the above water shortage detection method for a steam cooking device, the water shortage detection method further includes: within the time period corresponding to the time interval, obtaining the temperature change amount of the steam generating device within a preset duration; comparing the temperature change amount with a preset temperature change amount threshold; and judging whether the water box is short of water according to the comparison result between the time interval and the preset time interval threshold and the comparison result between the temperature change amount and the preset temperature change amount.

[0014] By obtaining the temperature change of the steam generating device within a preset duration during a time period corresponding to the time interval; comparing the temperature change with a preset temperature change threshold, and then simultaneously judging whether the water box is short of water according to the comparison result between the time interval and the preset time interval threshold and the comparison result between the temperature change and the preset temperature change, the accuracy of the judgment result can be further improved. This is because when the water volume in the water box is insufficient and in a water shortage state, the water volume entering the steam generating device will relatively decrease. When heating the water body, the temperature change within the preset duration will be higher than that under normal conditions. In this way, a secondary detection of the water shortage state is achieved under the condition of unchanged detection time, thereby improving the accuracy of the judgment result.

[0015] It can be understood that the preset temperature change threshold is measured during the experiment and is related to parameters such as the water inlet duration, the water inlet volume, and the heating power of the steam generating device.

[0016] In some feasible implementation manners of the water shortage detection method of the above steam cooking device, the temperature change is obtained after a set duration since the previous water inlet stopped, where the sum of the set duration and the preset duration is less than the time interval.

[0017] There will still be water body residues in the pipeline when the previous water inlet just stops, and the steam cooking device is in an unstable state due to the water body flow. By starting the detection and obtaining the temperature change after the set duration since the water inlet stopped, the temperature change is obtained in a relatively stable state, which is beneficial to improving the accuracy of the final judgment result.

[0018] In some feasible implementation manners of the water shortage detection method of the above steam cooking device, the "judging whether the water box is short of water according to the comparison result between the time interval and the preset time interval threshold and the comparison result between the temperature change and the preset temperature change" includes: if the time interval is less than or less than or equal to the preset time interval threshold, and the temperature change is greater than or greater than or equal to the preset temperature change threshold, it is judged that the water box is short of water.

[0019] In some feasible implementation manners of the water shortage detection method of the above steam cooking device, the water shortage detection method further includes: during the operation of the steam cooking device, obtaining the real-time temperature of the steam generating device; comparing the real-time temperature with a preset temperature threshold; if the real-time temperature is greater than or greater than or equal to the preset temperature threshold, it is judged that the water box is severely short of water and the machine stops.

[0020] By setting it in this way, the accuracy of the judgment result of the water shortage state of the steam cooking device can be further increased, and the steam cooking device can be timely stopped when the water tank is severely short of water (only a very small amount of water or no water), which can ensure the safety of the operation of the steam cooking device.

[0021] In some feasible implementation manners of the above-mentioned water shortage detection method of the steam cooking device, the steam generating device is an evaporation pan or a steam generator.

[0022] In a second aspect, the present invention further provides a computer device, which includes a memory and a processor. The memory is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the water shortage detection method of the steam cooking device described in any one of the above technical solutions.

[0023] In a third aspect, the present invention further provides a computer-readable storage medium, which stores multiple program codes, and the program codes are suitable for being loaded and run by a processor to execute the water shortage detection method of the steam cooking device described in any one of the above technical solutions.

[0024] In a fourth aspect, the present invention further provides a steam cooking device, which includes the computer device described in the foregoing technical solution.

[0025] Those skilled in the art can understand that since the steam cooking device, the computer device, and the computer-readable storage medium can execute the foregoing water shortage detection method of the steam cooking device, they have all the technical effects that can be obtained by the foregoing control method, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following describes the preferred embodiments of the present invention with reference to the drawings, in which:

[0027] Figure 1 is a flowchart of the water shortage detection method of the steam box provided in Embodiment 1 of the present invention;

[0028] Figure 2 is a flowchart of the water shortage detection method of the steam box provided in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios. For example, although the following embodiments are described by taking a steam box as an example, this is not restrictive. The technical solutions of the present invention are also applicable to other types of cooking devices such as steam ovens and microwave steam ovens, and are also applicable to integrated stoves with such cooking devices. Such changes in the application object do not deviate from the main idea of the present invention and should all be limited within the protection scope of the present invention.

[0030] To better illustrate the present invention, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present invention can also be implemented without some of these specific details.

[0031] In the description of the present invention, terms indicating directions or positional relationships such as "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships in actual application. This is only for the convenience of description and does not indicate or imply that the device to be protected must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, ordinal numbers such as "first", "second", etc. are only for convenience of description and do not indicate or imply relative importance.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] The steam box provided by the present invention includes a box body and a door body. The door body is pivotally connected to the box body. An inner container is provided in the box body. The inner container has a cooking cavity. An evaporation tray is provided on the bottom plate of the inner container. The evaporation tray is connected with an electric heater and a temperature sensor. The electric heater is placed outside the evaporation tray. The heat generated by the electric heater is suitable for generating steam from the water contained in the evaporation tray and supplying it to the cooking cavity; the temperature sensor is placed outside the evaporation tray and closely attached to the evaporation tray for detecting the temperature of the evaporation tray. The detection frequency of the temperature sensor can be set and adjusted before leaving the factory according to needs; a water box is also provided in the box body. The water box is communicated with the evaporation tray through a pipeline. A water pump is provided on the pipeline to pump the purified water in the water box into the evaporation tray when needed.

[0034] As steam continues to be generated and the water in the evaporation pan is depleted, the water pump will be triggered to start filling water into the evaporation pan. In some cases, if the clean water in the water box is insufficient but the user fails to notice in time, it will affect the cooking effect. In order to reduce the impact on the cooking effect after the water box runs out of water, the existing solution is to configure a water level gauge for the water box or detect the current of the water pump. The present invention provides another technical solution that can detect the water shortage in the water box quickly and accurately at low cost.

[0035] Embodiment 1

[0036] As Figure 1 shown, the water shortage detection method for the steam box provided by the present invention includes:

[0037] S10. Under the condition that the water inflow volume per unit time and the water inlet duration are the same, obtain the time interval between two adjacent water inlet operations.

[0038] Specifically, the control of the water inflow volume can be achieved by controlling the operating parameters of the water pump. For example, by adjusting the working frequency and working time of the water pump to ensure that the water inflow volume per unit time is constant. Alternatively, it can also be achieved by controlling the operating parameters of the water valve. For example, a water valve is connected to the water box, and by controlling the opening degree of the water valve, the water inflow volume per unit time can be ensured to be constant.

[0039] It can be understood that setting the water inflow volume per unit time and the water inlet duration to be the same is to ensure that the water volume in the evaporation pan is the same after each water inlet, so as to exclude the influence of the water volume on the water inlet time interval and prevent interference with the judgment result. In addition, the water inflow volume and water inlet time corresponding to different models of equipment can be different, and the specific set values are determined according to actual needs, and the present invention does not make specific limitations.

[0040] In addition, for triggering the operation of the water pump to start the water inlet operation, it can be by detecting the water level of the evaporation pan, or detecting the temperature change amount and change rate of the evaporation pan within a set duration, or by detecting the dry burning temperature of the evaporation pan, etc. The present invention does not make specific limitations on this.

[0041] S20. Compare the time interval with a preset time interval threshold.

[0042] Specifically, this time interval is the duration from the end of the previous water inlet to the start of the next water inlet. The preset time interval threshold is determined through experiments. Under the same heating conditions, such as the same heating power, the time required for the quantitative purified water added after the end of the previous water inlet to evaporate until the start of the next water inlet is basically determined and unchanged. If the actually obtained time interval is significantly less than the time required for normal evaporation, it indicates that there is a deviation between the water inlet volume this time and the water inlet volume under normal conditions (i.e., the water volume in the water box is sufficient). And when components such as the water pump or water valve do not malfunction, it is very likely that the purified water in the water box is insufficient, such as the water volume in the water box is insufficient, resulting in a decrease in the water pumping volume of the water pump, etc.

[0043] S30. Determine whether the water box is short of water at least based on the comparison result between the time interval and the preset time interval threshold.

[0044] This embodiment provides a method for determining whether the water box is short of water only based on the comparison result between the time interval and the preset time interval threshold.

[0045] Specifically, if the time interval is less than or less than or equal to the preset time interval threshold, it is determined that the water box is short of water. This is because, during the experiment, it was found that in some cases, the phenomenon of frequent water pumping would occur, and this phenomenon often occurred simultaneously with the insufficient purified water in the water box. After research, it was found that when the purified water in the water box is insufficient, the water inlet volume for each time cannot reach the predetermined water inlet volume, and then the water inlet for this time will be consumed in a shorter time to trigger the next water inlet. In view of this, the present invention infers whether the water box is short of water by obtaining the time interval between two adjacent water inlets. This method is simple, fast, has a high accuracy rate, and can be completed using existing components, without the need to set up an additional water level detection device, nor does it occupy the internal space of the water box.

[0046] If the time interval is greater than or equal to or greater than the preset time interval threshold, it is determined that the water box is not short of water.

[0047] It can be understood that the preset time interval threshold is less than the duration required to consume the single water inlet volume under normal conditions.

[0048] The water shortage detection method provided by the present invention can simply and quickly determine the water shortage state of the water box, and further remind the user to add water in time. Moreover, it has a low cost and high accuracy. Combined with the water shortage judgment of the evaporation pan, it can more timely detect the water shortage situation during the cooking process, thus providing convenience for the user and avoiding losses to the user.

[0049] Embodiment 2

[0050] This embodiment provides a judgment method that can further improve the accuracy of the judgment result of the water shortage state of the water box.

[0051] Such as Figure 2As shown in the figure, the water shortage detection method provided in this embodiment includes:

[0052] S101. When the water inflow volume and the water inlet duration in a unit time are the same, obtain the time interval between two adjacent water inlet operations.

[0053] Specifically, refer to step S10 of Embodiment 1.

[0054] S102. In the time period corresponding to the time interval, obtain the temperature change amount of the steam generating device within a preset duration.

[0055] In this embodiment, the temperature change amount is obtained before obtaining the time interval. Specifically, in the period from the end of the previous water inlet to the start of the next water inlet, the water added to the evaporation pan is consumed. Before stable heating to generate steam, within a very short time (preset duration), by obtaining the temperature change amount within this corresponding duration, the water volume situation in the evaporation pan is further reflected through the degree of temperature change.

[0056] Furthermore, the temperature change amount is obtained after a set duration since the previous water inlet stops, where the sum of the set duration and the preset duration is less than the time interval. In this way, the temperature change amount can be obtained when the water body is in a stable state, thereby reducing the influence of other factors on the detection result.

[0057] S103. Compare the temperature change amount with a preset temperature change amount threshold; compare the time interval with a preset time interval threshold.

[0058] It should be noted that the step of comparing the temperature change amount with the preset temperature change amount threshold can be carried out simultaneously with the step of comparing the time interval with the preset time interval threshold, or the former can be prior to the latter, because the time for obtaining the temperature change amount is usually earlier than the time for obtaining the time interval.

[0059] S104. According to the comparison result between the time interval and the preset time interval threshold, and the comparison result between the temperature change amount and the preset temperature change amount, determine whether the water box is short of water.

[0060] Specifically, if the time interval is less than or less than or equal to the preset time interval threshold, and the temperature change amount is greater than or greater than or equal to the preset temperature change amount threshold, it is determined that the water box is short of water.

[0061] If the time interval is greater than or equal to or greater than the preset time interval threshold, and the temperature change amount is less than or equal to or less than the preset temperature change threshold, it is determined that the water box is not short of water.

[0062] If the time interval is less than or less than or equal to a preset time interval threshold, and the temperature change amount is less than or equal to or less than a preset temperature change amount threshold, it is determined that the water box is short of water. This situation may be caused by the relatively high initial temperature of the evaporation tray.

[0063] If the time interval is greater than or greater than or equal to a preset time interval threshold, and the temperature change amount is greater than or greater than or equal to a preset temperature change threshold, it is determined that the water box is not short of water. This situation may be caused by the relatively low initial temperature of the evaporation tray.

[0064] Embodiment 3

[0065] On the basis of the above embodiments, to further improve the safety of the steam box during operation, the steam box is further provided with an ultra-high temperature threshold, and the ultra-high temperature threshold is greater than the dry-burning temperature of the evaporation tray.

[0066] Specifically, the water shortage detection method provided in this embodiment further includes:

[0067] During the operation of the steam cooking device, obtain the real-time temperature of the steam generating device.

[0068] Compare the real-time temperature with a preset temperature threshold.

[0069] If the real-time temperature is greater than or greater than or equal to the preset temperature threshold, it is determined that the water box is severely short of water and the machine stops.

[0070] In this way, due to the severe shortage of water in the water box, even if the evaporation tray triggers the water inlet mechanism due to water shortage, the evaporation tray cannot be replenished with water in time due to the lack of water in the water box, and then the temperature of the evaporation tray exceeds the set dry-burning temperature. At this time, by stopping the machine, the safety of the steam box can be guaranteed.

[0071] It can be understood that the detection and judgment steps in this embodiment can be carried out in parallel with the steps in Embodiment 1 and Embodiment 2.

[0072] It should be noted that the above embodiments are described by taking a steam box configured with an evaporation tray as an example. Alternatively, a steam generator can be used to replace the evaporation tray to generate steam. In addition, the above temperature sensor can also be arranged inside the evaporation tray and close to the evaporation tray.

[0073] It can be understood that when a steam generator is used to replace the evaporation tray to generate steam, the setting methods of the electric heating and the temperature sensor in the steam generator can be similar to those of the evaporation tray.

[0074] The invention embodiment also provides a computer device, which includes a memory and a processor. The memory is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the water shortage detection method of the steam box in any one of the foregoing technical solutions.

[0075] An embodiment of the present invention further provides a computer-readable storage medium, which stores multiple program codes. The program codes are suitable for being loaded and run by a processor to execute the water shortage detection method of the steam box in any one of the foregoing technical solutions.

[0076] It can be understood that the computer device can be arranged behind the control panel.

[0077] An embodiment of the present invention further provides a steam cooking device, which is configured with the foregoing computer device.

[0078] In the description of the present invention, the "processor" may include hardware, software, or a combination of both. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in a software manner, a hardware manner, or a combination of both. The non-transitory computer-readable storage medium includes any suitable medium for storing program codes, such as magnetic disks, hard disks, optical discs, flash memories, read-only memories, random access memories, etc.

[0079] Those skilled in the art can understand that all or part of the processes in the methods of the above embodiments of the present invention can also be completed by hardware related to computer program instructions. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program codes, and the computer program codes can be in the form of source code, object code, executable files, or some intermediate forms, etc. The computer-readable storage medium may include: any entity or device, medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal, and software distribution medium that can carry the computer program codes.

[0080] So far, the technical solutions of the present invention have been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A water shortage detection method for a steam cooking device, characterized in that, The steam cooking device is provided with a water box and a steam generating device. The water box is connected to the steam generating device to supply water into the steam generating device. The water shortage detection method includes: Under the condition that the water intake volume per unit time and the water intake duration are the same, obtain the time interval between two adjacent water intake operations; Compare the time interval with a preset time interval threshold; Judge whether the water box is short of water at least based on the comparison result between the time interval and the preset time interval threshold.

2. The water shortage detection method of the steam cooking device according to claim 1, characterized in that The "judging whether the water box is short of water at least based on the comparison result between the time interval and the preset time interval threshold" includes: If the time interval is less than or less than or equal to the preset time interval threshold, it is judged that the water box is short of water; or If the time interval is greater than or equal to or greater than the preset time interval threshold, it is judged that the water box is not short of water.

3. The water shortage detection method of the steam cooking device according to claim 1, wherein, The water shortage detection method further includes: During the time period corresponding to the time interval, obtain the temperature change amount of the steam generating device within a preset duration; Compare the temperature change amount with a preset temperature change amount threshold; Judge whether the water box is short of water according to the comparison result between the time interval and the preset time interval threshold, and the comparison result between the temperature change amount and the preset temperature change amount.

4. The water shortage detection method of the steam cooking device according to claim 3, characterized in that, The temperature change amount is obtained after a set duration since the previous water intake stops, where the sum of the set duration and the preset duration is less than the time interval.

5. The water shortage detection method of the steam cooking device according to claim 3, characterized in that, The "judging whether the water box is short of water according to the comparison result between the time interval and the preset time interval threshold, and the comparison result between the temperature change amount and the preset temperature change amount" includes: If the time interval is less than or less than or equal to the preset time interval threshold, and the temperature change amount is greater than or greater than or equal to the preset temperature change amount threshold, it is judged that the water box is short of water.

6. The water shortage detection method of the steam cooking device according to claim 1, characterized in that, The water shortage detection method further includes: During the operation of the steam cooking device, obtain the real-time temperature of the steam generating device; Compare the real-time temperature with a preset temperature threshold; If the real-time temperature is greater than or greater than or equal to the preset temperature threshold, it is judged that the water box is severely short of water and the device stops.

7. The water shortage detection method of the steam cooking device according to claim 1, characterized in that The steam generating device is an evaporation pan or a steam generator.

8. A computer device, characterized in that, The computer device includes a memory and a processor. The memory is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the water shortage detection method of the steam cooking device according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores multiple program codes, and the program codes are suitable for being loaded and run by a processor to execute the water shortage detection method of the steam cooking device according to any one of claims 1 to 7.

10. A steam cooking device, characterized in that, The steam cooking device includes the computer device according to claim 8.

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