Automatic control method, device, storage medium and dishwasher of a dishwasher

Abstract

The present invention provides an automatic control method, device, storage medium and dishwasher for a dishwasher. The method includes: when the dishwasher starts a washing operation, controlling a glow discharge device of the dishwasher to perform a sterilization operation; obtaining a first spectral signal intensity of a glow signal emitted by the glow discharge device; determining whether the first spectral signal intensity reaches a preset sterilization spectral signal intensity; if the first spectral signal intensity does not reach the preset sterilization spectral signal intensity, extending the washing duration corresponding to the current washing operation to meet the sterilization requirement of the dishwasher. When the spectral signal intensity of the glow signal emitted by the glow discharge device cannot reach the sterilization spectral signal intensity, the present invention extends the washing duration of the dishwasher to meet the sterilization effect of the dishwasher, effectively avoiding the problem that the glow intensity decreases after the glow discharge device works for a period of time, thereby affecting the sterilization effect of the dishwasher, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to an automatic control method, device, storage medium and dishwasher for a dishwasher. Background Art

[0002] Currently, the sterilization methods of dishwashers on the market mainly include high-temperature sterilization, high-temperature + UV ultraviolet sterilization, high-temperature + silver ion sterilization, and high-temperature + plasma sterilization, etc.

[0003] Among them, high-temperature sterilization is to use a high temperature of 60 - 75 °C for a period of time during the washing process of the dishwasher. This high-temperature sterilization step can eliminate common Escherichia coli and Staphylococcus aureus, playing a certain disinfection role; UV ultraviolet sterilization is to cut off the bacterial reproduction ability to achieve a temporary bacteriostatic effect. However, neither of the above two sterilization effects can completely kill harmful substances to achieve the purpose of complete sterilization.

[0004] The glow discharge plasma sterilization technology is a technology that maintains a plasma through a DC glow discharge between an electrode and an electrolyte solution by discharging an electrode plate. When the voltage between the two electrodes is high enough, the conventional electrolysis is automatically converted into glow discharge electrolysis, thereby generating a plasma, and then using the plasma to perform efficient sterilization and disinfection on tableware to solve the problem of low sterilization efficiency of existing dishwashers. However, after the glow discharge device works for a period of time, due to impurity problems on its electrode plate, the ionization intensity between the electrodes becomes weak, and the glow intensity generated at this time decreases, thereby affecting the sterilization effect of the dishwasher. Summary of the Invention

[0005] The present invention provides an automatic control method, device, storage medium and dishwasher for a dishwasher to solve the problem that the glow intensity decreases after the glow discharge device works for a period of time in the prior art, affecting the sterilization effect of the dishwasher.

[0006] One aspect of the present invention provides an automatic control method for a dishwasher, the method comprising:

[0007] When the dishwasher starts a washing operation, controlling the glow discharge device of the dishwasher to perform a sterilization operation;

[0008] Obtaining a first spectral signal intensity of a glow signal emitted by the glow discharge device;

[0009] Judging whether the first spectral signal intensity reaches a preset sterilization spectral signal intensity;

[0010] If the first spectral signal intensity does not reach the preset sterilization spectral signal intensity, extending the washing duration corresponding to the current washing operation to meet the sterilization requirement of the dishwasher.

[0011] Further, the operation of the controlled glow discharge device for sterilization includes:

[0012] Controlling the PWM duty cycle of the supply voltage of the glow discharge device to start working at a first duty cycle, where the PWM duty cycle is the ratio of the duration of the high level in a supply cycle to the duration of the supply cycle;

[0013] Gradually increasing the PWM duty cycle of the supply voltage of the glow discharge device by a preset first duty cycle difference;

[0014] Recording the PWM duty cycle of the supply voltage before each increase as the second duty cycle, and the PWM duty cycle of the supply voltage after the increase as the third duty cycle, and determining whether an overcurrent or overvoltage signal is sent by the protection signal detection device of the dishwasher when the PWM duty cycle of the supply voltage maintains at the third duty cycle;

[0015] If no overcurrent or overvoltage signal is sent, continue to increase the PWM duty cycle of the supply voltage of the glow discharge device until the PWM duty cycle of the supply voltage is increased to a fourth duty cycle and remains unchanged, where the fourth duty cycle is the stable supply duty cycle of the glow discharge device pre-stored in the system.

[0016] Further, if an overcurrent or overvoltage signal is sent by the protection signal detection device of the dishwasher, the method further includes:

[0017] Lowering the PWM duty cycle of the supply voltage of the glow discharge device to the second duty cycle;

[0018] Gradually increasing the PWM duty cycle of the supply voltage of the glow discharge device by a preset second duty cycle difference, where the second duty cycle difference < the first duty cycle difference;

[0019] Recording the PWM duty cycle of the supply voltage before each increase as the fifth duty cycle, and the PWM duty cycle of the supply voltage after the increase as the sixth duty cycle, and determining whether an overcurrent or overvoltage signal is sent by the protection signal detection device of the dishwasher when the PWM duty cycle of the supply voltage maintains at the sixth duty cycle;

[0020] If no overcurrent or overvoltage signal is sent, continue to increase the PWM duty cycle of the supply voltage of the glow discharge device until the PWM duty cycle of the supply voltage is increased to a seventh duty cycle and remains unchanged; where the seventh duty cycle < the fourth duty cycle, and the difference between the fourth duty cycle and the seventh duty cycle < the second duty cycle difference.

[0021] Further, after the PWM duty cycle of the supply voltage is increased to the seventh duty cycle and remains unchanged, the method further includes:

[0022] Store the seventh duty cycle as the stable power supply duty cycle of the glow discharge device.

[0023] Further, before the dishwasher starts the washing operation, the method further includes:

[0024] Control the PWM wave duty cycle of the power supply voltage of the glow discharge device to start working at the first duty cycle and obtain the first voltage value fed back by the glow discharge device;

[0025] Judge whether the first voltage value is less than the theoretical power supply voltage of the glow discharge device corresponding to the first duty cycle pre-stored in the system;

[0026] If it is less, increase the PWM wave duty cycle of the power supply voltage of the glow discharge device step by step with a preset first duty cycle difference, and obtain the voltage value fed back by the glow discharge device corresponding to the current PWM wave duty cycle of the power supply voltage after each increase in the PWM wave duty cycle of the power supply voltage;

[0027] Draw a duty cycle-voltage curve according to the voltage values fed back by the glow discharge device corresponding to the PWM wave duty cycles of each level of the power supply voltage obtained again;

[0028] Update the value of the first duty cycle and the value of the stable power supply duty cycle of the PWM wave duty cycle of the power supply voltage of the glow discharge device according to the duty cycle-voltage curve.

[0029] Further, the updating the value of the first duty cycle and the value of the stable power supply duty cycle of the PWM wave duty cycle of the power supply voltage of the glow discharge device according to the duty cycle-voltage curve includes:

[0030] Obtain the PWM wave duty cycle of the power supply voltage corresponding to the initial working voltage position point of the glow discharge device pre-stored in the system in the curve as the first duty cycle according to the duty cycle-voltage curve;

[0031] Obtain the PWM wave duty cycle of the power supply voltage corresponding to the highest working voltage position point of the glow discharge device pre-stored in the system in the curve as the stable power supply duty cycle according to the duty cycle-voltage curve.

[0032] Another aspect of the present invention provides an automatic control device for a dishwasher, and the device includes:

[0033] A control module, configured to control the glow discharge device of the dishwasher to perform a sterilization operation when the dishwasher starts the washing operation;

[0034] An acquisition module, configured to acquire the first spectral signal intensity of the glow signal emitted by the glow discharge device;

[0035] A judgment module, configured to judge whether the intensity of the first spectral signal reaches a preset sterilization spectral signal intensity;

[0036] The control module is further configured to, if the intensity of the first spectral signal does not reach the preset sterilization spectral signal intensity, extend the washing duration corresponding to the current washing operation to meet the sterilization requirement of the dishwasher.

[0037] In addition, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-described method are implemented.

[0038] In addition, the present invention also provides a dishwasher, including a memory, a processor, and a computer program stored on the memory and running on the processor. When the processor executes the computer program, the steps of the above-described method are implemented.

[0039] Further, the dishwasher further includes a spectral signal intensity detection device. The spectral signal intensity detection device includes a convex lens, an optical fiber, and a spectral sensor. The convex lens is configured to refract the glow signal emitted by the glow discharge device into the optical fiber. The optical fiber is configured to transmit the glow signal refracted by the convex lens to the spectral sensor. The spectral sensor is configured to convert the glow signal transmitted by the optical fiber into an electrical signal and transmit it to the controller of the dishwasher.

[0040] The automatic control method, device, storage medium, and dishwasher of the dishwasher provided by the embodiments of the present invention extend the washing duration of the dishwasher when the spectral signal intensity of the glow signal emitted by the glow discharge device cannot reach the sterilization spectral signal intensity to meet the sterilization effect of the dishwasher, effectively avoiding the problem that the glow intensity decreases after the glow discharge device works for a period of time, thereby affecting the sterilization effect of the dishwasher, and improving the user experience.

[0041] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are hereinafter specifically exemplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0043] Figure 1Schematic flowchart of an automatic control method for a dishwasher provided by an embodiment of the present invention;

[0044] Figure 2 Schematic diagram of the corresponding relationship between the spectral signal intensity of the glow emitted by the glow discharge device provided by an embodiment of the present invention and the electric field intensity generated by the glow discharge device;

[0045] Figure 3 Schematic diagram of the duty cycle - voltage curve provided by an embodiment of the present invention;

[0046] Figure 4 Schematic diagram of the structure of an automatic control device for a dishwasher provided by an embodiment of the present invention;

[0047] Figure 5 Schematic diagram of the structure of a spectral signal intensity detection device provided by an embodiment of the present invention;

[0048] Description of the markings in the figure:

[0049] 1. Glow discharge device; 2. Convex lens; 3. Optical fiber; 4. Spectral sensor; 5. Controller;

[0050] 401. Control module; 402. Acquisition module; 403. Judgment module. Detailed implementation manners

[0051] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Figure 1 Schematically shows a flowchart of an automatic control method for a dishwasher provided by an embodiment of the present invention. It can be seen from Figure 1 that the automatic control method for the dishwasher of the present invention includes the following steps:

[0054] S1. When the dishwasher starts the washing operation, control the glow discharge device of the dishwasher to perform the sterilization operation;

[0055] In the embodiment of the present invention, during the process of controlling the dishwasher to perform the washing operation, the glow discharge device is simultaneously controlled to start working to perform the corresponding sterilization operation. Figure 2 Schematic diagram of the corresponding relationship between the spectral signal intensity of the glow emitted by the glow discharge device provided by the embodiment of the present invention and the electric field intensity generated by the glow discharge device. It can be seen from Figure 2 that the higher the electric field intensity generated by the glow discharge device, the stronger the spectral signal intensity of the glow emitted by the glow discharge device. And because the stronger the spectral signal intensity of the glow emitted by the glow discharge device, the better its sterilization effect. Therefore, a preferred embodiment of controlling the glow discharge device of the dishwasher to perform the sterilization operation in the embodiment of the present invention is to control the glow discharge device to work at a higher working power to generate a higher electric field intensity under the condition that the load of the dishwasher permits, so as to ultimately achieve a better sterilization effect.

[0056] S2. Obtain the first spectral signal intensity of the glow signal emitted by the glow discharge device;

[0057] In the embodiment of the present invention, after the dishwasher works for a period of time, the spectral signal intensity of the glow signal generated under a fixed supply voltage will also change. Therefore, in the embodiment of the present invention, it is judged whether the first spectral signal intensity of the glow signal emitted by the glow discharge device detected in real time reaches the preset sterilization spectral signal intensity, so as to further judge whether it is necessary to extend the sterilization duration of the glow discharge device to meet the sterilization requirements of the dishwasher.

[0058] S3. Judge whether the first spectral signal intensity reaches the preset sterilization spectral signal intensity;

[0059] S4. If the first spectral signal intensity does not reach the preset sterilization spectral signal intensity, then extend the washing duration corresponding to the current washing operation to meet the sterilization requirements of the dishwasher.

[0060] In a preferred embodiment of the embodiment of the present invention, the glow discharge device is controlled to work at a higher working power to achieve a better sterilization effect. Therefore, the control of the glow discharge device to perform the sterilization operation in the embodiment of the present invention further includes the following steps not shown in the drawings:

[0061] S11. Control the duty cycle of the PWM wave of the supply voltage of the glow discharge device to start working with a first duty cycle. The duty cycle of the PWM wave is the ratio of the duration of the high level in a supply cycle to the duration of the supply cycle.

[0062] In the embodiment of the present invention, in order to avoid the occurrence of overcurrent or overvoltage when the glow discharge device directly operates at the highest supply voltage, the supply voltage of the glow discharge device is gradually increased by gradually increasing the duty cycle of the PWM wave of the supply voltage of the glow discharge device. It should be noted that the voltage value of the supply voltage of the glow discharge device is reflected in the value of the duty cycle of the PWM wave of the supply voltage of the glow discharge device. The higher the value of the duty cycle of its PWM wave, the higher the voltage value reflected in the supply voltage of the glow discharge device.

[0063] S12. Gradually increase the duty cycle of the PWM wave of the supply voltage of the glow discharge device in steps with a preset first duty cycle difference.

[0064] In the embodiment of the present invention, gradually increasing the duty cycle of the PWM wave of the supply voltage of the glow discharge device in steps with a preset first duty cycle difference is specifically manifested as: K n+1 = K n + k1, where K n is the duty cycle of the PWM wave of the supply voltage of the glow discharge device before being increased, K n+1 is the duty cycle of the PWM wave of the supply voltage of the glow discharge device after being increased, and k1 is the first duty cycle difference.

[0065] S13. Record the duty cycle of the PWM wave of the supply voltage before each increase as the second duty cycle, and the duty cycle of the PWM wave of the supply voltage after the increase as the third duty cycle, and determine whether the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal when the duty cycle of the PWM wave of the supply voltage maintains at the third duty cycle.

[0066] In the embodiment of the present invention, when performing protection signal detection, record the duty cycle K n of the PWM wave of the supply voltage of the glow discharge device before the increase as the second duty cycle, and record the duty cycle K n+1 of the PWM wave of the supply voltage after the increase as the third duty cycle. And after each increase in the duty cycle of the PWM wave of the supply voltage of the glow discharge device, determine whether the protection signal detection device issues an overcurrent or overvoltage signal to facilitate dynamically adjusting the supply voltage of the glow discharge device so that, on the premise of maintaining a relatively high working power, it will not cause the occurrence of dangerous situations such as overcurrent or overvoltage.

[0067] S14. If no overcurrent or overvoltage signal is issued, continue to increase the PWM wave duty cycle of the power supply voltage of the glow discharge device until the PWM wave duty cycle of the power supply voltage is increased to a fourth duty cycle and remains unchanged, wherein the fourth duty cycle is a stable power supply duty cycle of the glow discharge device pre-stored in the system.

[0068] In an embodiment of the present invention, the stable power supply duty cycle of the glow discharge device pre-stored in the system is the PWM wave duty cycle of the power supply voltage corresponding to the highest power supply voltage that the glow discharge device can maintain. At this time, the working power of the glow discharge device is the highest and no overcurrent or overvoltage signal will occur, thereby having the best sterilization effect.

[0069] Furthermore, in the embodiment of the present invention, when the protection signal detection device of the dishwasher sends an overcurrent or overvoltage signal, the control method thereof further includes the following steps which are not shown in the drawings:

[0070] S150, lowering the PWM wave duty cycle of the power supply voltage of the glow discharge device to a second duty cycle;

[0071] S151, gradually increasing the PWM wave duty cycle of the power supply voltage of the glow discharge device by a preset second duty cycle difference, wherein the second duty cycle difference is less than the first duty cycle difference;

[0072] In the embodiment of the present invention, when the duty cycle of the PWM wave of the power supply voltage of the glow discharge device is the second duty cycle, no overcurrent or overvoltage signal is issued. When the duty cycle of the PWM wave of the power supply voltage of the glow discharge device is the third duty cycle, an overcurrent or overvoltage signal is issued, which proves that the duty cycle of the PWM wave of the maximum power supply voltage that the glow discharge device can reach at this time is between the second duty cycle and the third duty cycle. At this time, the duty cycle of the PWM wave of the power supply voltage of the glow discharge device is adjusted down to the second duty cycle and the duty cycle of the PWM wave of the power supply voltage of the glow discharge device is increased by the second duty cycle difference level. The purpose of the embodiment of the present invention is to find the PWM wave duty cycle of the glow discharge device with the highest working power and no overcurrent or overvoltage signal by reducing the duty cycle difference of the PWM wave adjusted each time.

[0073] S152, recording that the PWM wave duty cycle of the power supply voltage before each increase is the fifth duty cycle, and the PWM wave duty cycle of the power supply voltage after the increase is the sixth duty cycle, and determining whether the protection signal detection device of the dishwasher sends an overcurrent or overvoltage signal when the PWM wave duty cycle of the power supply voltage is maintained at the sixth duty cycle;

[0074] S153. If no overcurrent or overvoltage signal has been sent, continue to increase the duty cycle of the PWM wave of the supply voltage of the glow discharge device until the duty cycle of the PWM wave of the supply voltage is increased to the seventh duty cycle and remains unchanged; wherein, the seventh duty cycle < the fourth duty cycle, and the difference between the fourth duty cycle and the seventh duty cycle < the second duty cycle difference.

[0075] In the embodiment of the present invention, since it has been confirmed in the foregoing embodiment that an overcurrent or overvoltage signal will be sent when the duty cycle of the PWM wave of the supply voltage is maintained at the third duty cycle, when the duty cycle of the PWM wave is adjusted again, it is necessary to control the adjusted PWM duty cycle not to be higher than the third duty cycle. Moreover, in order to find the optimal solution, on the premise that no overcurrent or overvoltage signal reminder occurs, the PWM duty cycle should satisfy that the difference between the fourth duty cycle and the seventh duty cycle < the second duty cycle difference.

[0076] Further, after step S152 in the embodiment of the present invention, if the protection signal detection device of the dishwasher sends an overcurrent or overvoltage signal, the duty cycle difference of the PWM wave increased each time can be reduced again, and the steps after step S151 can be repeatedly executed to find the duty cycle of the PWM wave with the highest working power of the glow discharge device and without overcurrent or overvoltage signals.

[0077] It should be noted that the first duty cycle difference and the second duty cycle difference are values pre-stored in the system related to the rated power, washing requirements, and control accuracy of the dishwasher, and the present invention does not make specific limitations on this.

[0078] Further, after the duty cycle of the PWM wave of the supply voltage is increased to the seventh duty cycle and remains unchanged, the method further includes storing the seventh duty cycle as the stable supply duty cycle of the glow discharge device.

[0079] Further, the automatic control method of the dishwasher in the embodiment of the present invention further includes an automatic calibration link after the dishwasher runs for a period of time. Specifically, the automatic calibration link includes the following real-time steps:

[0080] S21. Control the duty cycle of the PWM wave of the supply voltage of the glow discharge device to start working at the first duty cycle and obtain the first voltage value fed back by the glow discharge device;

[0081] S22. Determine whether the first voltage value is less than the theoretical supply voltage of the glow discharge device corresponding to the first duty cycle pre-stored in the system;

[0082] In an embodiment of the present invention, in order to further avoid the situation where the voltage generated at a fixed duty cycle changes and the glow intensity weakens after the dishwasher has been used for a period of time, an automatic heavy control needs to be performed on the dishwasher to determine whether it is necessary to readjust the relevant set values of the PWM wave duty cycle of the glow discharge device, so as to improve work efficiency.

[0083] S23. If it is less, increase the PWM wave duty cycle of the supply voltage of the glow discharge device step by step with a preset first duty cycle difference, and obtain the voltage value fed back by the glow discharge device corresponding to the current PWM wave duty cycle of the supply voltage after each increase in the PWM wave duty cycle of the supply voltage;

[0084] In an embodiment of the present invention, when the first voltage value is less than the theoretical supply voltage of the glow discharge device corresponding to the first duty cycle pre-stored in the system, it proves that at this time, it is necessary to readjust the relevant set values of the PWM wave duty cycle of the glow discharge device.

[0085] S24. Draw a duty cycle-voltage curve according to the voltage values fed back by the glow discharge device corresponding to the PWM wave duty cycles of each level of supply voltage obtained again;

[0086] Figure 3 Schematically shows the correspondence between the duty cycle-voltage curve and the usage duration in an embodiment of the present invention, where curve 1 is the duty cycle-voltage curve of the adjusted straight line, and curve 2 is the duty cycle-voltage curve after adjustment. From Figure 3 It can be seen that as the usage duration of the dishwasher increases, at the same PWM wave duty cycle, the supply voltage of the glow discharge device decreases accordingly. It is proved that if the glow discharge device of the dishwasher always uses a fixed PWM wave duty cycle, its sterilization effect will gradually decrease with the usage duration.

[0087] S25. Update the numerical value of the first duty cycle and the numerical value of the stable supply duty cycle of the PWM wave of the supply voltage of the glow discharge device according to the duty cycle-voltage curve.

[0088] In an embodiment of the present invention, if the duty cycle-voltage curve changes, continuing to use the previously stored first duty cycle as the PWM wave duty cycle for the initial operation of the glow discharge device obviously cannot meet the requirement of the initial operating voltage, and it will also waste the adjustment time of the operating voltage of the glow discharge device. Therefore, the present invention re-sets the numerical value of the first duty cycle and the numerical value of the stable supply duty cycle in real time according to the re-drawn duty cycle-voltage curve.

[0089] Further, in the embodiments of the present invention, the updating of the value of the first duty cycle of the PWM wave of the supply voltage of the glow discharge device and the value of the stable supply duty cycle according to the duty cycle-voltage curve includes: obtaining, according to the duty cycle-voltage curve, the duty cycle of the PWM wave of the supply voltage corresponding to the initial operating voltage position point of the glow discharge device pre-stored in the system in the curve as the first duty cycle; obtaining, according to the duty cycle-voltage curve, the duty cycle of the PWM wave of the supply voltage corresponding to the highest operating voltage position point of the glow discharge device pre-stored in the system in the curve as the stable supply duty cycle.

[0090] In addition, it should be noted that when the duty cycle of the PWM wave of the supply voltage corresponding to the highest operating voltage position point of the glow discharge device pre-stored in the system exceeds 1, it proves that the glow signal emitted by the glow discharge device of the dishwasher at this time cannot emit the sterilization spectral signal intensity that meets the sterilization requirement. At this time, only by extending the washing duration of the dishwasher can the sterilization requirement of the dishwasher be met. Therefore, the automatic control method of the dishwasher in the embodiments of the present invention further includes: when the duty cycle of the PWM wave of the supply voltage corresponding to the highest operating voltage position point of the glow discharge device pre-stored in the system obtained according to the duty cycle-voltage curve exceeds 1, setting 1 as the duty cycle of the PWM wave of the supply voltage as the stable supply duty cycle, and extending the predetermined washing duration of the dishwasher.

[0091] For the method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present invention are not limited by the described action sequence, because according to the embodiments of the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0092] Figure 4 Schematically shows a structural diagram of an automatic control device of a dishwasher according to an embodiment of the present invention. Referring to Figure 4 , an automatic control device of a dishwasher according to an embodiment of the present invention specifically includes a control module 401, an acquisition module 402, and a judgment module 403, where:

[0093] The control module 401 is configured to control the glow discharge device of the dishwasher to perform a sterilization operation when the dishwasher starts a washing operation;

[0094] The acquisition module 402 is configured to acquire the first spectral signal intensity of the glow signal emitted by the glow discharge device;

[0095] The judgment module 403 is configured to judge whether the first spectral signal intensity reaches a preset sterilization spectral signal intensity;

[0096] The control module 401 is further configured to, if the intensity of the first spectral signal does not reach the preset sterilization spectral signal intensity, extend the washing duration corresponding to the current washing operation to meet the sterilization requirement of the dishwasher.

[0097] Further, the control module 401 is specifically configured to control the PWM duty cycle of the supply voltage of the glow discharge device to start working at a first duty cycle, where the PWM duty cycle is the ratio of the duration of the high level in a supply cycle to the duration of the supply cycle;

[0098] The control module 401 further includes:

[0099] A duty cycle adjustment sub-module, configured to gradually increase the PWM duty cycle of the supply voltage of the glow discharge device by a preset first duty cycle difference;

[0100] A judgment sub-module, configured to record that the PWM duty cycle of the supply voltage before each increase is a second duty cycle, and the PWM duty cycle of the supply voltage after the increase is a third duty cycle, and judge whether the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal when the PWM duty cycle of the supply voltage maintains the third duty cycle;

[0101] The control module 401 is further configured to, if no overcurrent or overvoltage signal is issued, continue to increase the PWM duty cycle of the supply voltage of the glow discharge device until the PWM duty cycle of the supply voltage is increased to a fourth duty cycle and remains unchanged, where the fourth duty cycle is the stable supply duty cycle of the glow discharge device pre-stored in the system.

[0102] Further,

[0103] The control module 401 is further configured to, if the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal, lower the PWM duty cycle of the supply voltage of the glow discharge device to the second duty cycle;

[0104] The duty cycle adjustment sub-module is further configured to gradually increase the PWM duty cycle of the supply voltage of the glow discharge device by a preset second duty cycle difference, where the second duty cycle difference < the first duty cycle difference;

[0105] The judgment sub-module is further configured to record that the PWM duty cycle of the supply voltage before each increase is a fifth duty cycle, and the PWM duty cycle of the supply voltage after the increase is a sixth duty cycle, and judge whether the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal when the PWM duty cycle of the supply voltage maintains the sixth duty cycle;

[0106] The control module 401 is further configured to, if no overcurrent or overvoltage signal has been issued, continue to increase the duty cycle of the PWM wave of the power supply voltage of the glow discharge device until the duty cycle of the PWM wave of the power supply voltage is increased to a seventh duty cycle and remains unchanged; wherein, the seventh duty cycle < the fourth duty cycle, and the difference between the fourth duty cycle and the seventh duty cycle < the second duty cycle difference.

[0107] Further, the dishwasher automatic control device according to an embodiment of the present invention further includes:

[0108] A storage module, configured to store the seventh duty cycle as the stable power supply duty cycle of the glow discharge device.

[0109] Further, the dishwasher automatic control device according to an embodiment of the present invention further includes a set value adjustment module, and the set value adjustment module includes:

[0110] A control sub-module, configured to control the duty cycle of the PWM wave of the power supply voltage of the glow discharge device to start working at a first duty cycle and obtain a first voltage value fed back by the glow discharge device;

[0111] A second judgment sub-module, configured to judge whether the first voltage value is less than the theoretical power supply voltage of the glow discharge device corresponding to the first duty cycle pre-stored in the system;

[0112] A storage sub-module, configured to, if it is less, increase the duty cycle of the PWM wave of the power supply voltage of the glow discharge device step by step at a preset first duty cycle difference, and obtain the voltage value fed back by the glow discharge device corresponding to the current duty cycle of the PWM wave of the power supply voltage after each increase in the duty cycle of the PWM wave of the power supply voltage;

[0113] A curve drawing module, configured to draw a duty cycle-voltage curve according to the voltage values fed back by the glow discharge device corresponding to the duty cycles of the PWM waves of the power supply voltages at each level obtained again.

[0114] An obtaining sub-module, configured to re-set the value of the first duty cycle of the duty cycle of the PWM wave of the power supply voltage of the glow discharge device and the value of the stable power supply duty cycle according to the duty cycle-voltage curve.

[0115] The obtaining sub-module is specifically configured to obtain, as the first duty cycle, the duty cycle of the PWM wave of the power supply voltage corresponding to the initial working voltage position point of the glow discharge device pre-stored in the system in the curve according to the duty cycle-voltage curve; obtain, as the stable power supply duty cycle, the duty cycle of the PWM wave of the power supply voltage corresponding to the highest working voltage position point of the glow discharge device pre-stored in the system in the curve. And store the first duty cycle and the stable power supply duty cycle into the storage module.

[0116] For the device embodiments, since they are basically similar to the method embodiments, they are described relatively simply. For the relevant parts, please refer to the corresponding descriptions in the method embodiments.

[0117] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0118] The automatic control method and device of the dishwasher provided by the embodiments of the present invention extend the washing duration of the dishwasher when the spectral signal intensity of the glow signal emitted by the glow discharge device cannot reach the germicidal spectral signal intensity, so as to meet the germicidal effect of the dishwasher, effectively avoiding the problem that the glow intensity decreases after the glow discharge device works for a period of time, which affects the sterilization effect of the dishwasher, and improving the user experience.

[0119] In addition, the embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the steps of the above-described method are implemented.

[0120] In this embodiment, if the modules / units integrated in the automatic control device of the dishwasher are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described method embodiments of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0121] Exemplarily, the computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program in the automatic control device of the dishwasher. For example, the computer program may be divided into a control module 401, an acquisition module 402, and a judgment module 403.

[0122] In addition, an embodiment of the present invention further provides a dishwasher, including a controller, where the controller includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps in the following embodiments of the automatic control method of each dishwasher are implemented, for example Figure 1 the S1 to S4 shown. Alternatively, when the processor executes the computer program, the functions of the following modules / units in the embodiments of the automatic control device of each dishwasher are implemented, for example Figure 4 the control module 401, the acquisition module 402, and the judgment module 403 shown.

[0123] Furthermore, the dishwasher according to the embodiment of the present invention further includes a spectral signal intensity detection device. Refer to Figure 5 The spectral signal intensity detection device includes a convex lens 2, an optical fiber 3, and a spectral sensor 4. The convex lens 2 is used to refract the glow signal emitted by the glow discharge device 1 into the optical fiber 3. The optical fiber 3 is used to transmit the glow signal refracted by the convex lens 2 to the spectral sensor 4. The spectral sensor 4 is used to convert the glow signal transmitted by the optical fiber into an electrical signal and transmit it to the controller 5 of the dishwasher.

[0124] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, any one of the embodiments claimed in the present application can be used in any combination.

[0125] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic control method for a dishwasher, characterized in that, The method includes: When the dishwasher starts the washing operation, controlling the glow discharge device of the dishwasher to perform a sterilization operation; Obtaining the first spectral signal intensity of the glow signal emitted by the glow discharge device; Judging whether the first spectral signal intensity reaches a preset sterilization spectral signal intensity; If the first spectral signal intensity does not reach the preset sterilization spectral signal intensity, extending the washing duration corresponding to the current washing operation to meet the sterilization requirement of the dishwasher; The controlling the glow discharge device to perform the sterilization operation includes: Controlling the PWM duty cycle of the supply voltage of the glow discharge device to start working with a first duty cycle, where the PWM duty cycle is the ratio of the duration of the high level in a supply cycle to the duration of the supply cycle; Gradually increasing the PWM duty cycle of the supply voltage of the glow discharge device by a preset first duty cycle difference; Recording the PWM duty cycle of the supply voltage before each increase as the second duty cycle, and the PWM duty cycle of the supply voltage after the increase as the third duty cycle, and judging whether the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal when the PWM duty cycle of the supply voltage maintains the third duty cycle; If no overcurrent or overvoltage signal is issued, continue to increase the PWM duty cycle of the supply voltage of the glow discharge device until the PWM duty cycle of the supply voltage is increased to a fourth duty cycle and remains unchanged, where the fourth duty cycle is the stable supply duty cycle of the glow discharge device pre-stored in the system.

2. The method according to claim 1, characterized in that, If the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal, the method further includes: Lowering the PWM duty cycle of the supply voltage of the glow discharge device to the second duty cycle; Gradually increasing the PWM duty cycle of the supply voltage of the glow discharge device by a preset second duty cycle difference, where the second duty cycle difference < the first duty cycle difference; Recording the PWM duty cycle of the supply voltage before each increase as the fifth duty cycle, and the PWM duty cycle of the supply voltage after the increase as the sixth duty cycle, and judging whether the protection signal detection device of the dishwasher issues an overcurrent or overvoltage signal when the PWM duty cycle of the supply voltage maintains the sixth duty cycle; If no overcurrent or overvoltage signal is issued, continue to increase the PWM duty cycle of the supply voltage of the glow discharge device until the PWM duty cycle of the supply voltage is increased to a seventh duty cycle and remains unchanged; where the seventh duty cycle < the fourth duty cycle, and the difference between the fourth duty cycle and the seventh duty cycle < the second duty cycle difference.

3. The method according to claim 2, characterized in that, After the PWM duty cycle of the supply voltage is increased to the seventh duty cycle and remains unchanged, the method further includes: Storing the seventh duty cycle as the stable supply duty cycle of the glow discharge device.

4. The method according to claim 1, characterized in that, Before the dishwasher starts the washing operation, the method further includes: Controlling the PWM duty cycle of the supply voltage of the glow discharge device to start working with a first duty cycle and obtaining the first voltage value fed back by the glow discharge device; Determine whether the first voltage value is less than the theoretical supply voltage of the glow discharge device corresponding to the first duty cycle pre-stored in the system; If it is less, gradually increase the PWM duty cycle of the supply voltage of the glow discharge device by a preset first duty cycle difference, and obtain the voltage value fed back by the glow discharge device corresponding to the PWM duty cycle of the current supply voltage after each increase in the PWM duty cycle of the supply voltage; Draw a duty cycle-voltage curve according to the voltage values fed back by the glow discharge device corresponding to the PWM duty cycles of each level of supply voltage obtained again; Update the values of the first duty cycle and the stable supply duty cycle of the PWM duty cycle of the supply voltage of the glow discharge device according to the duty cycle-voltage curve; 5. The method according to claim 4, characterized in that, The updating the values of the first duty cycle and the stable supply duty cycle of the PWM duty cycle of the supply voltage of the glow discharge device according to the duty cycle-voltage curve includes: Obtain the PWM duty cycle of the supply voltage corresponding to the initial working voltage position point of the glow discharge device pre-stored in the system in the curve as the first duty cycle according to the duty cycle-voltage curve; Obtain the PWM duty cycle of the supply voltage corresponding to the highest working voltage position point of the glow discharge device pre-stored in the system in the curve as the stable supply duty cycle according to the duty cycle-voltage curve; 6. An automatic control device for a dishwasher, characterized in that, The device includes: A control module, configured to control the glow discharge device of the dishwasher to perform a sterilization operation when the dishwasher starts a washing operation; An acquisition module, configured to acquire the first spectral signal intensity of the glow signal emitted by the glow discharge device; A judgment module, configured to judge whether the first spectral signal intensity reaches a preset sterilization spectral signal intensity; The control module is further configured to, if the first spectral signal intensity does not reach the preset sterilization spectral signal intensity, extend the washing duration corresponding to the current washing operation to meet the sterilization requirement of the dishwasher.

7. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-5.

8. A dishwasher, comprising a memory, a processor, and a computer program stored on the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1-5.

9. The dishwasher according to claim 8, characterized in that, The dishwasher further includes a spectral signal intensity detection device, and the spectral signal intensity detection device includes a convex lens, an optical fiber, and a spectral sensor. The convex lens is used to refract the glow signal emitted by the glow discharge device into the optical fiber, the optical fiber is used to transmit the glow signal refracted by the convex lens to the spectral sensor, and the spectral sensor is used to convert the glow signal transmitted by the optical fiber into an electrical signal and transmit it to the controller of the dishwasher.

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