Dishwasher and automatic water filling method and automatic water filling system thereof

Abstract

The present invention discloses a dishwasher and an automatic water replenishment method and an automatic water replenishment system thereof, wherein the method comprises: obtaining the working current of a variable frequency washing pump in the dishwasher, determining the water level of the inner tank of the dishwasher according to the working current of the variable frequency washing pump, and controlling the water inlet valve of the dishwasher to open when it is determined that the dishwasher needs water replenishment according to the inner tank water level. The automatic water replenishment method of the present invention determines the water level of the inner tank of the dishwasher according to the working current of the variable frequency washing pump, and the water level detection is more reliable, which can avoid the dishwasher from triggering water replenishment by mistake.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwasher control, and in particular to an automatic water replenishing system for a dishwasher, an automatic water replenishing system for a dishwasher, a dishwasher and a computer-readable storage medium. Background Art

[0002] Currently, when using a dishwasher to wash tableware, incorrect placement of tableware in the dishwasher, water leakage in the breather, insufficient water intake, etc. may cause the actual washing water level of the dishwasher to be insufficient, resulting in poorly washed tableware.

[0003] In the related art, a water level switch is used to detect the water level. When the water level is low, the water level signal is fed back to the controller, and the controller reduces the speed to prevent the water level from dropping when the washing pump speed is too high, or the controller controls the water inlet valve to open to replenish water. In the related art, a float device is also used to drain water when the water level is high and replenish water when the water level is low.

[0004] However, the above-mentioned method of using a water level switch is related to the speed of the washing pump. If there is no feedback on the speed, the detection result is unreliable. Although the float solution has exquisite functions, it is too complicated in structure and the reliability of the whole machine is not high. In addition, both of the above methods require additional components, such as water level switches and floats, which not only increase costs, but also lead to long production and testing cycles and difficulty in upgrading. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose an automatic water filling method for a dishwasher, which determines the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump, improves the reliability of water level detection, and can effectively avoid the dishwasher from triggering water filling by mistake. Moreover, through the automatic water filling of the dishwasher, the tableware can be washed in a higher water level to achieve a better washing effect.

[0006] A second object of the present invention is to provide an automatic water replenishment system for a dishwasher.

[0007] A third object of the present invention is to provide a dishwasher.

[0008] A fourth object of the present invention is to provide a computer-readable storage medium.

[0009] To achieve the above-mentioned purpose, the first aspect of the present invention proposes an automatic water replenishment method for a dishwasher, comprising: obtaining the working current of a variable frequency washing pump in the dishwasher; determining the water level in an inner tank of the dishwasher according to the working current of the variable frequency washing pump; and controlling the water inlet valve of the dishwasher to open when it is determined that the dishwasher needs water replenishment according to the water level in the inner tank.

[0010] According to the automatic water replenishment method of the dishwasher of the embodiment of the present invention, the working current of the variable frequency washing pump in the dishwasher is first obtained, and the water level of the inner tank of the dishwasher is determined according to the working current of the variable frequency washing pump, and when it is determined according to the inner tank water level that the dishwasher needs to be replenished, the water inlet valve of the dishwasher is controlled to open. Therefore, the method can determine the inner tank water level of the dishwasher according to the working current of the variable frequency washing pump, improve the reliability of water level detection, and effectively avoid the dishwasher from triggering water replenishment by mistake. Moreover, through the automatic water replenishment of the dishwasher, the tableware can be washed in a higher water level to achieve a better washing effect.

[0011] In addition, the automatic water replenishment method for the dishwasher according to the above embodiment of the present invention may also have the following additional technical features:

[0012] According to one embodiment of the present invention, the water level in the inner tank of the dishwasher is determined according to the working current of the variable frequency washing pump, including: determining an average current value, a maximum current value and a minimum current value according to the working current of the variable frequency washing pump within a first preset time; and determining the water level in the inner tank of the dishwasher according to the average current value, the maximum current value and the minimum current value.

[0013] According to one embodiment of the present invention, the water level in the inner tank of the dishwasher is determined based on the average current value, the maximum current value and the minimum current value, including: when the average current value is less than a first preset current threshold, the maximum current value is less than a second preset current threshold, and the minimum current value is less than a third preset current threshold, determining that the water level in the inner tank of the dishwasher is less than a preset water level.

[0014] According to an embodiment of the present invention, after the water inlet valve of the dishwasher is controlled to be opened, timing is started, and when the timing time reaches a second preset time, the water inlet valve is controlled to be closed.

[0015] According to another embodiment of the present invention, after the water inlet valve of the dishwasher is controlled to open, the replenishment amount of water is further acquired, and when the replenishment amount of water reaches a preset value, the water inlet valve is controlled to close.

[0016] According to an embodiment of the present invention, the automatic water replenishment method for the dishwasher further includes: obtaining the number of times the water inlet valve is opened, and when the number of times the water inlet valve is opened reaches a preset number, prohibiting the dishwasher from automatically replenishing water.

[0017] According to an embodiment of the present invention, when the water inlet valve of the dishwasher is controlled to be opened, the heating device of the dishwasher is also controlled to stop heating.

[0018] To achieve the above-mentioned purpose, the second aspect of the present invention proposes an automatic water replenishment system for a dishwasher, comprising: a current detector for detecting the working current of a variable frequency washing pump in the dishwasher; a water inlet controller for determining the water level in an inner tank of the dishwasher according to the working current of the variable frequency washing pump, and controlling the water inlet valve of the dishwasher to open when it is determined that the dishwasher needs to be replenished with water according to the water level in the inner tank.

[0019] According to the automatic water replenishment system of the dishwasher of the embodiment of the present invention, the current detector detects the working current of the variable frequency washing pump in the dishwasher, and the water inlet controller determines the water level of the inner tank of the dishwasher according to the working current of the variable frequency washing pump, and when it is determined that the dishwasher needs to be replenished according to the water level in the inner tank, the water inlet valve of the dishwasher is controlled to open, thereby realizing automatic water replenishment of the dishwasher. Thus, the system can determine the water level of the inner tank of the dishwasher according to the working current of the variable frequency washing pump, improve the reliability of water level detection, and effectively avoid the dishwasher from triggering water replenishment by mistake. Through the automatic water replenishment of the dishwasher, the tableware can be washed in a higher water level, achieving a better washing effect.

[0020] To achieve the above-mentioned purpose, a dishwasher is proposed in an embodiment of the third aspect of the present invention, comprising: a memory, a processor, and an automatic water replenishment program for the dishwasher stored in the memory and executable on the processor, wherein when the processor executes the automatic water replenishment program for the dishwasher, the automatic water replenishment method for the dishwasher is implemented.

[0021] According to the dishwasher of the embodiment of the present invention, by executing the above-mentioned automatic water replenishment method for the dishwasher, the water level in the inner tank of the dishwasher can be determined according to the working current of the variable frequency washing pump, thereby improving the reliability of water level detection and effectively avoiding the dishwasher from triggering water replenishment by mistake. In addition, through the automatic water replenishment of the dishwasher, the dishes can be washed in a higher water level to achieve a better washing effect.

[0022] To achieve the above-mentioned purpose, a fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned automatic water replenishment method for a dishwasher.

[0023] According to the computer-readable storage medium of an embodiment of the present invention, by executing the above-mentioned automatic water replenishment method for the dishwasher, the water level in the inner tank of the dishwasher can be determined according to the working current of the variable frequency washing pump, thereby improving the reliability of water level detection. At the same time, it can effectively avoid the dishwasher from falsely triggering water replenishment. Moreover, through the automatic water replenishment of the dishwasher, the tableware can be washed at a higher water level to achieve a better washing effect.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of an automatic water replenishment method for a dishwasher according to an embodiment of the present invention;

[0026] Figure 2 A block diagram of an automatic water replenishment system for a dishwasher according to an embodiment of the present invention;

[0027] Figure 3 is a block diagram of an automatic water replenishment system for a dishwasher according to an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of a dishwasher according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following describes an automatic water replenishment method for a dishwasher, an automatic water replenishment system for a dishwasher, and a dishwasher according to embodiments of the present invention with reference to the accompanying drawings.

[0031] This application can complete water level detection and realize water replenishment without introducing new components. Figure 2 Explain how to achieve automatic water filling in the dishwasher.

[0032] See also Figure 2 As shown, the automatic water replenishment system of the dishwasher may include: a variable frequency washing pump 30, a current detector 10, a variable frequency driver 40, a flow meter 50, a water inlet valve 60 and a water inlet controller 20. The variable frequency driver 10, the current detector 10 and the water inlet controller 20 may be integrated on the same circuit board or on different circuit boards. The variable frequency driver 30 and the current detector 10 are respectively connected to the variable frequency washing pump 30. The current detector 10 is used to detect the working current of the variable frequency washing pump 30. The variable frequency driver 40 is used to generate an SPWM (Sinusoidal Pulse Width Modulation) signal to make the variable frequency washing pump work. The water inlet controller 60 is respectively connected to the flow meter 50 and the water inlet valve 50. The flow meter 50 converts the water volume information into a pulse signal and feeds it back to the water inlet controller 20. The water inlet controller 60 is used to control the working state of the water inlet valve 60. The combination of the variable frequency washing pump 30, the current detector 10 and the variable frequency driver 40 is equivalent to forming a water level detection sensor, which transmits the water level signal to the water inlet controller 20.

[0033] Specifically, when the dishwasher washes dishes, the current detector 10 detects the working current of the variable frequency washing pump 30, and the water inlet controller 20 determines the water level in the inner tank of the dishwasher according to the working current detected by the current detector 10, and controls the water inlet valve 60 to open when the water level in the inner tank is low, so that the dishwasher can automatically replenish water; when the amount of water flowing through the flow meter 50 reaches a preset value, the flow meter 50 converts the water amount into a pulse and feeds it back to the water inlet controller 20, and the water inlet controller 20 controls the water inlet valve 60 to close, and the automatic water replenishment process of the dishwasher is completed.

[0034] Figure 1 4 is a flow chart of an automatic water replenishment method for a dishwasher according to an embodiment of the present invention.

[0035] In one embodiment of the present invention, the dishwasher mainly refers to a variable frequency dishwasher. The variable frequency dishwasher can adjust the speed of the variable frequency washing pump by adjusting the voltage, and can also select the appropriate washing water flow, time, and speed according to the degree of dirtiness of the dishes. Since the variable frequency dishwasher uses a direct drive motor, it avoids the use of transmission parts such as transmission belts, greatly reduces the noise of the variable frequency washing pump, and has a lower failure rate. In addition, during the entire washing and drying process, the frequency conversion technology can control the speed of the variable frequency washing pump, which is more energy-saving and power-saving.

[0036] like Figure 1 As shown, the automatic water replenishment method of the dishwasher according to the embodiment of the present invention may include the following steps:

[0037] S1, obtains the working current of the variable frequency washing pump in the dishwasher.

[0038] In one embodiment of the present invention, a current detector is provided in the dishwasher to detect the working current of the variable frequency washing pump; or a voltage detector provided in the dishwasher detects the working voltage of the variable frequency washing pump, and based on the relationship between current and voltage, the working current of the variable frequency washing pump can be further obtained.

[0039] It should be noted that when the dishwasher is washing, the variable frequency drive in the dishwasher controls the variable frequency washing pump to perform washing according to the washing signal. Among them, the working current of the variable frequency washing pump is not constant. The magnitude of its working current is related to the amount of dishes to be washed and the water level in the dishwasher tank. Therefore, the water level in the dishwasher tank can be determined according to the working current of the variable frequency washing pump.

[0040] S2, determining the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump.

[0041] During the operation of the variable frequency washing pump, the current detector in the dishwasher detects the working current of the variable frequency washing pump in real time, and feeds the detected working current back to the water inlet controller. The water inlet controller determines the water level in the inner tank of the dishwasher based on the working current detected within a period of time.

[0042] According to one embodiment of the present invention, determining the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump may include: determining the average current value, the maximum current value and the minimum current value according to the working current of the variable frequency washing pump within a first preset time; determining the water level in the inner tank of the dishwasher according to the average current value, the maximum current value and the minimum current value. The first preset time may be calibrated according to the time situation, for example, the first preset time may be 5s.

[0043] Further, according to an embodiment of the present invention, determining the water level in the inner tank of the dishwasher according to the average current value Ia, the maximum current value Imax and the minimum current value Imin may include: when the average current value Ia is less than the first preset current threshold value I1, the maximum current value Imax is less than the second preset current threshold value I2, and the minimum current value Imin is less than the third preset current threshold value I3, determining that the water level in the inner tank of the dishwasher is less than the preset water level. The first preset current threshold value, the second preset current threshold value, the third preset current threshold value and the preset water level may be calibrated according to actual conditions. For example, the preset water level may be a value within the range of [1.0L, 2.5L], and the specific value may be selected in combination with the capacity of the dishwasher.

[0044] Specifically, when the dishwasher is washing, the magnitude of the real-time working current of the variable frequency washing pump is closely related to the water level in the dishwasher's inner tank. Generally, the higher the water level in the dishwasher's inner tank, the greater the load of the dishwasher, and the greater the real-time working current of the variable frequency washing pump; as the water level in the dishwasher's inner tank becomes lower, the load of the dishwasher also becomes smaller, and the real-time working current of the variable frequency washing pump also decreases. Therefore, the water level in the dishwasher's inner tank can be obtained based on the magnitude of the real-time working current of the variable frequency washing pump.

[0045] Specifically, during the washing operation of the variable frequency washing pump, the real-time working current of the variable frequency washing pump is not in a stable state, and there may be abnormal fluctuations in the working current. In order to eliminate the influence of the abnormal fluctuations in the working current of the variable frequency washing pump and prevent misjudgment when detecting the water level of the inner tank of the dishwasher, the working current values ​​of all the variable frequency washing pumps within a period of time (a first preset time, such as 5s) can be obtained, and the working current values ​​can be calculated. After calculation, the average current value Ia (the ratio of the sum of all collected working currents to the number of all collected working currents), the maximum current value Imax and the minimum current value Imin (the maximum current value and the minimum current value can be obtained through the corresponding function) of the working current of the variable frequency washing pump within a period of time (the first preset time) can be obtained, and then the water level of the inner tank of the dishwasher can be comprehensively judged according to the working current Ia (average current value), Imax (maximum current value) and Imin (minimum current value).

[0046] Among them, when the real-time working current Ia (average current value), Imax (maximum current value) and Imin (minimum current value) of the variable frequency washing pump simultaneously meet the conditions (1) Ia (average current value) is less than I1 (first preset current threshold); (2) Imax (maximum current value) is less than I2 (second preset current threshold); (3) Imin (minimum current value) is less than I3 (third preset current threshold), it can be determined that the water level in the inner tank of the dishwasher is too low, that is, less than the preset water level, and the inner tank of the dishwasher needs to be replenished with water.

[0047] S3, when it is determined according to the water level in the inner tank that the dishwasher needs to be replenished with water, the water inlet valve of the dishwasher is controlled to open.

[0048] Specifically, when it is determined that the water level in the dishwasher tank is low (lower than the preset water level) and water needs to be added, the water inlet valve of the dishwasher can be controlled to open so that water flows into the tank, thereby realizing automatic water addition of the dishwasher. After water addition, the water level in the dishwasher tank rises, and the dishes washed in the dishwasher are immersed in the higher water level for washing, thereby achieving a better washing effect.

[0049] Therefore, through the above-mentioned automatic water replenishment method, the water level in the inner tank of the dishwasher can be determined according to the working current of the variable frequency washing pump. When the water level in the inner tank of the dishwasher is low and needs to be replenished, the water inlet valve can be controlled to open to realize automatic water replenishment of the dishwasher, thereby improving the reliability of water level detection, and avoiding the dishwasher from falsely triggering water replenishment. Moreover, there is no need to add new components to the dishwasher to detect the water level and realize automatic water replenishment. The dishwasher can realize automatic water replenishment by simply upgrading the software, without extending the production and testing cycle, thus saving production costs.

[0050] The following describes in detail how to control the water inlet valve of the dishwasher in the above embodiment of the present invention.

[0051] According to an embodiment of the present invention, after the water inlet valve of the dishwasher is controlled to be opened, timing is started, and when the timing time reaches a second preset time, the water inlet valve is controlled to be closed. The second preset time is calibrated according to actual conditions, for example, it can be set according to relevant parameters of the dishwasher (such as the volume of the inner tank of the dishwasher).

[0052] In other words, when it is determined that the water level in the inner tank of the dishwasher is low and needs to be replenished, the water inlet valve is controlled to open, and water flows into the inner tank of the dishwasher through the water inlet valve, and the timing starts at this time. As time accumulates, water is continuously replenished into the inner tank of the dishwasher, and the water level in the inner tank of the dishwasher continues to rise over time. When the total replenishment time reaches the second preset time, the water level in the inner tank of the dishwasher can re-immerse the tableware, and the water inlet valve of the dishwasher is controlled to close and stop replenishing water.

[0053] In one embodiment of the present invention, when the opening of the water inlet valve can be adjusted, the setting of the second preset time is not only related to the capacity of the inner tank, but also to the opening of the water inlet valve. Under the condition that the capacity of the inner tank is determined, the larger the opening of the water inlet valve, the shorter the second preset time, and the smaller the opening of the water inlet valve, the longer the second preset time.

[0054] According to another embodiment of the present invention, after the water inlet valve of the dishwasher is controlled to open, the water replenishment amount is also obtained, and when the water replenishment amount reaches a preset value, the water inlet valve is controlled to close. The preset value can be calibrated according to actual conditions, for example, it can be set according to relevant parameters of the dishwasher, such as the preset value can be a value within the range of [0.2L, 1L].

[0055] In other words, when the water inlet valve of the dishwasher is controlled to replenish water in the dishwasher tank, the amount of water flowing into the dishwasher tank is counted, for example, the water flow rate flowing into the tank can be obtained through a flow meter. When the amount of water flowing into the dishwasher tank, i.e., the replenishment amount, reaches a preset replenishment value, the water inlet valve can be controlled to close, and replenishment of water to the dishwasher tank can be stopped to prevent the water level in the tank from being too high, affecting the washing effect and increasing energy consumption.

[0056] According to an embodiment of the present invention, the automatic water replenishment method of the dishwasher may further include: obtaining the number of times the water inlet valve is opened, and when the number of times the water inlet valve is opened reaches a preset number, prohibiting the dishwasher from automatically replenishing water. The preset number may be set according to actual conditions, for example, according to specific parameters of the dishwasher, such as 4-20 times.

[0057] Specifically, during the dishwashing operation of the dishwasher, as water splashes and evaporates, the water level in the dishwasher tank may be detected as low more than once, which means that it needs to be refilled multiple times. During operation, the dishwasher continuously detects the water level in the tank. When the water level in the tank is insufficient, the water inlet valve is opened to refill water. After the refilling is completed, the dishwasher continues to work and continues to detect the water level continuously. When the water level is insufficient, it refills water, and repeats this process until the number of refills reaches a certain number (preset number), and then the refilling of water in the dishwasher tank is stopped. When the number of refills reaches a certain number (preset number), it means that the dishwasher has been working for a long time and the dishes inside the dishwasher have been cleaned. In order to avoid wasting resources, the dishwasher stops washing.

[0058] In order to protect the components in the dishwasher from being damaged, in one embodiment of the present invention, when the water inlet valve of the dishwasher is controlled to be opened, the heating device of the dishwasher is also controlled to stop heating.

[0059] That is to say, when the water level in the dishwasher tank is low and needs to be replenished, the dishwasher's heating device may be exposed to the water surface. If the dishwasher's heating device is still in the heating state at this time, the heating device may be dry-burned, thereby causing damage to the heating device. Therefore, when the water inlet valve is controlled to be opened, the heating device can also be controlled to stop heating at this time, thereby avoiding dry-burning of the heating device and extending the service life of the heating device.

[0060] To sum up, the automatic water replenishment method of the dishwasher according to the embodiment of the present invention can determine the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump, thereby improving the reliability of water level detection. At the same time, it can effectively avoid the dishwasher from falsely triggering water replenishment. Moreover, through the automatic water replenishment of the dishwasher, the tableware can be washed at a higher water level to achieve a better washing effect.

[0061] Corresponding to the above embodiment, the present invention also proposes an automatic water replenishment system for a dishwasher.

[0062] Figure 3 Schematic diagram of an automatic water replenishment system for a dishwasher according to an embodiment of the present invention.

[0063] like Figure 3 As shown, the automatic water replenishment system of the dishwasher according to the embodiment of the present invention may include: a current detector 10 and a water inlet controller 20 .

[0064] Among them, the current detector 10 is used to detect the working current of the variable frequency washing pump in the dishwasher; the water inlet controller 20 is used to determine the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump, and when it is determined that the dishwasher needs to be replenished with water according to the water level in the inner tank, control the water inlet valve of the dishwasher to open.

[0065] According to one embodiment of the present invention, the water inlet controller 20 determines the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump, and is specifically used to determine Ia (average current value), Imax (maximum current value) and Imin (minimum current value) according to the working current of the variable frequency washing pump within the first preset time; determine the water level in the inner tank of the dishwasher according to Ia (average current value), Imax (maximum current value) and Imin (minimum current value).

[0066] According to one embodiment of the present invention, the water inlet controller 20 determines the water level in the inner tank of the dishwasher based on Ia (average current value), Imax (maximum current value) and Imin (minimum current value), and is specifically used to determine that the water level in the inner tank of the dishwasher is lower than the preset water level when Ia (average current value) is less than I1 (first preset current threshold), Imax (maximum current value) is less than I2 (second preset current threshold), and Imin (minimum current value) is less than I3 (third preset current threshold).

[0067] According to an embodiment of the present invention, the water inlet controller 20 starts timing after controlling the water inlet valve of the dishwasher to open, and controls the water inlet valve to close when the timing time reaches a second preset time.

[0068] Specifically, when it is determined that the water level in the inner tank of the dishwasher is low and needs to be replenished, the water inlet controller 20 controls the water inlet valve to open, and water flows into the inner tank of the dishwasher through the water inlet valve, and the timing starts at this time. As time accumulates, water is continuously replenished into the inner tank of the dishwasher, and the water level in the inner tank of the dishwasher continues to rise over time. When the total replenishment time reaches the second preset time, the water level in the inner tank of the dishwasher can re-immerse the tableware, and the water inlet valve of the dishwasher is controlled to close, and the water replenishment stops.

[0069] According to another embodiment of the present invention, after controlling the water inlet valve of the dishwasher to open, the water inlet controller 20 is further used to obtain the replenishment amount of water, and control the water inlet valve to close when the replenishment amount of water reaches a preset value.

[0070] Specifically, when the water inlet valve of the dishwasher is controlled to replenish water into the inner tank of the dishwasher, the water inlet controller 20 counts the amount of water flowing into the inner tank of the dishwasher, for example, the water flow rate flowing into the inner tank can be obtained through a flow meter. When the amount of water flowing into the inner tank of the dishwasher, i.e., the replenishment amount of water, reaches a preset replenishment value, the water inlet valve can be controlled to close, and the replenishment of water into the inner tank of the dishwasher can be stopped to prevent the water level in the inner tank from being too high, affecting the washing effect and increasing energy consumption.

[0071] According to an embodiment of the present invention, the water inlet controller 20 is further used to obtain the number of times the water inlet valve is opened, and when the number of times the water inlet valve is opened reaches a preset number, the dishwasher is prohibited from automatically replenishing water.

[0072] According to an embodiment of the present invention, when the water inlet controller 20 controls the water inlet valve of the dishwasher to open, it is also used to control the heating device of the dishwasher to stop heating.

[0073] Specifically, when the water level in the dishwasher tank is low and water needs to be added, the heating device of the dishwasher may be exposed to the water surface. If the heating device of the dishwasher is still in the heating state at this time, the heating device may be dry-burned, thereby causing damage to the heating device. Therefore, when the water inlet valve is controlled to be opened, the heating device can also be controlled to stop heating at this time, thereby avoiding dry-burning of the heating device and extending the service life of the heating device.

[0074] In a specific example of the present invention, Figure 2As shown, the automatic water replenishment system of the dishwasher may also include: a current detector 10, a water inlet controller 20, a variable frequency washing pump 30, a variable frequency driver 40, a flow meter 50, and a water inlet valve 60. Among them, the variable frequency driver 40 can generate an SPWM signal to activate the variable frequency washing pump 30, the current detector 10 can detect the current of the variable frequency washing pump, and the flow meter 50 can count the amount of water flowing through. The variable frequency driver 40, the current detector 10 and the water inlet controller 20 can be arranged on the same circuit board or on different circuit boards. The variable frequency driver 40 and the current detector 10 are connected to the variable frequency washing pump 30, and the water inlet controller 20 is connected to the flow meter 50 and the water inlet valve 60. The flow meter 50 converts the water volume into pulse feedback to the water inlet controller 20, and the water inlet controller 20 supplies power to the water inlet valve 60 to activate it. The variable frequency washing pump 30, the current detector 10 and the variable frequency driver 40 constitute a water level detection sensor, which transmits the water level signal to the water inlet controller 20.

[0075] Specifically, when the dishwasher washes dishes, the current detector 10 detects the working current of the variable frequency washing pump 30, and the water inlet controller 20 determines the water level in the inner tank of the dishwasher according to the working current detected by the current detector 10, and controls the water inlet valve 60 to open when the water level in the inner tank is low, so that the dishwasher can automatically replenish water; when the amount of water flowing through the flow meter 50 reaches a preset value, the flow meter 50 converts the water amount into a pulse and feeds it back to the water inlet controller 20, and the water inlet controller 20 controls the water inlet valve 60 to close, and the automatic water replenishment process of the dishwasher is completed.

[0076] It should be noted that for details not disclosed in the automatic water replenishment system of the dishwasher in the embodiment of the present invention, please refer to the details disclosed in the automatic water replenishment method of the dishwasher in the embodiment of the present invention, and the details will not be repeated here.

[0077] According to the automatic water replenishment system of the dishwasher according to the embodiment of the present invention, the water level in the inner tank of the dishwasher can be determined according to the working current of the variable frequency washing pump, thereby improving the reliability of water level detection and effectively avoiding the dishwasher from falsely triggering water replenishment. Through the automatic water replenishment of the dishwasher, the tableware can be washed at a higher water level to achieve a better washing effect.

[0078] Corresponding to the above embodiment, the present invention further provides a dishwasher.

[0079] Figure 4 Schematic diagram of a dishwasher according to an embodiment of the present invention.

[0080] like Figure 4 As shown, the dishwasher 100 of the embodiment of the present invention includes: a memory 110, a processor 120, and a computer program stored in the memory 110 and executable on the processor 120. When the processor 120 executes the program, the above-mentioned automatic water replenishment method of the dishwasher is implemented.

[0081] According to the dishwasher of the embodiment of the present invention, by executing the above-mentioned automatic water replenishment method of the dishwasher, the water level in the inner tank of the dishwasher can be determined according to the working current of the variable frequency washing pump, thereby improving the reliability of water level detection and effectively avoiding the dishwasher from falsely triggering water replenishment. Moreover, through the automatic water replenishment of the dishwasher, the tableware can be washed at a higher water level to achieve a better washing effect.

[0082] Corresponding to the above embodiment, the present invention also proposes a computer-readable storage medium.

[0083] The computer-readable storage medium according to the embodiment of the present invention stores a computer program, and when the program is executed by a processor, the automatic water replenishment method for the dishwasher proposed in the above embodiment of the present invention can be implemented.

[0084] According to the computer-readable storage medium of an embodiment of the present invention, by executing the above-mentioned automatic water replenishment method for the dishwasher, the water level in the inner tank of the dishwasher can be determined according to the working current of the variable frequency washing pump, thereby improving the reliability of water level detection. At the same time, it can effectively avoid the dishwasher from falsely triggering water replenishment. Moreover, through the automatic water replenishment of the dishwasher, the tableware can be washed at a higher water level to achieve a better washing effect.

[0085] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0086] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for automatically replenishing water for a dishwasher, characterized in that: include: Obtaining the working current of the variable frequency washing pump in the dishwasher; Determining the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump specifically includes: determining an average current value, a maximum current value and a minimum current value according to the working current of the variable frequency washing pump within a first preset time; Determining the water level in the inner tank of the dishwasher according to the average current value, the maximum current value and the minimum current value specifically includes: when the average current value is less than a first preset current threshold, the maximum current value is less than a second preset current threshold, and the minimum current value is less than a third preset current threshold, determining that the water level in the inner tank of the dishwasher is less than a preset water level; When it is determined according to the water level in the inner tank that the dishwasher needs to be replenished with water, the water inlet valve of the dishwasher is controlled to open.

2. The method according to claim 1, characterized in that After the water inlet valve of the dishwasher is controlled to be opened, timing is started, and when the timing time reaches a second preset time, the water inlet valve is controlled to be closed.

3. The method according to claim 1, characterized in that: After the water inlet valve of the dishwasher is controlled to be opened, the water replenishment amount is also obtained, and when the water replenishment amount reaches a preset value, the water inlet valve is controlled to be closed.

4. The method according to claim 1, characterized in that: Also includes: The number of times the water inlet valve is opened is obtained, and when the number of times the water inlet valve is opened reaches a preset number, the dishwasher is prohibited from automatically replenishing water.

5. The method according to claim 1, characterized in that When the water inlet valve of the dishwasher is controlled to be opened, the heating device of the dishwasher is also controlled to stop heating.

6. An automatic water replenishment system for a dishwasher, used to implement the automatic water replenishment method for a dishwasher as claimed in claim 1, characterized in that: The automatic water replenishment system comprises: A current detector, used to detect the working current of the variable frequency washing pump in the dishwasher; The water inlet controller is used to determine the water level in the inner tank of the dishwasher according to the working current of the variable frequency washing pump, and control the water inlet valve of the dishwasher to open when it is determined that the dishwasher needs to be replenished with water according to the water level in the inner tank.

7. A dishwasher, characterized in that: include: A memory, a processor, and an automatic water replenishment program for a dishwasher stored in the memory and executable on the processor, wherein when the processor executes the automatic water replenishment program for the dishwasher, the automatic water replenishment method for the dishwasher according to any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the automatic water replenishment method for the dishwasher according to any one of claims 1 to 5 is implemented.

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