Water pressure control method and device for water injection nozzle of dish-washing machine and dish-washing machine

Abstract

The invention provides a water pressure control method and device for a water injection nozzle of a dish-washing machine and the dish-washing machine, and relates to the technical field of dish-washing machines. A controller of the dish-washing machine obtains water spraying pressure of a water spraying opening of the washing pipeline; when the difference value between the determined water spraying pressure of the water spraying opening and the standard water spraying pressure associated with the target washing mode is larger than a set difference value threshold value, operation parameters of a driving motor are adjusted according to the difference value; and returning to execute the step of controlling the driving motor to drive the washing water pump to suck the water outside the washing cavity into the washing pipeline and spray the water out of the water injection nozzle until the difference value between the determined water injection water pressure of the water injection nozzle and the standard water injection water pressure is smaller than the difference value threshold value. In this way, stamping of the water injection nozzle of the dish washing machine can be stable, and bowls can be well washed.

Description

Technical Field

[0001] The present application relates to the technical field of dishwashers, and in particular to a method and device for controlling the water pressure of a water spray port of a dishwasher, and the dishwasher. Background Art

[0002] With the advancement of technology, dishwashers have become ubiquitous, bringing convenience to people's lives. When washing dishes, dishwashers must control the water spray from the dishwasher's water outlets according to different wash modes to rinse the dishes. The various wash modes correspond to different water outlet pressures, and each wash mode requires a constant pressure at the corresponding water outlet.

[0003] Currently, the method for maintaining a constant rinse pressure during a particular wash mode is to control the dishwasher's drive motor to maintain a constant speed. However, if the dishwasher's water circulation piping becomes clogged or bubbles form, even with a constant drive motor speed, the rinse pressure from the dishwasher's water outlets may still be unstable. This, in turn, results in incomplete cleaning of the dishes. Summary of the Invention

[0004] The present application provides a method and device for controlling the water pressure of a dishwasher's water spray outlet, and a dishwasher, which are used to solve the problem of blockage of the water circulation pipeline of the dishwasher in the prior art, which causes the flushing pressure of the dishwasher's water spray outlet to be unstable when spraying water, resulting in incomplete cleaning of the dishes.

[0005] In a first aspect, the present application provides a method for controlling water pressure of a water spray port of a dishwasher, which is applied to the dishwasher. The dishwasher includes a controller, a drive motor, and a washing chamber, wherein the controller is electrically connected to the drive motor, a washing pipe is provided in the washing chamber, and a washing water pump is provided outside the washing chamber. The drive motor is used to drive the washing water pump, which is in electrical communication with the washing pipe, and the washing pipe is provided with a water spray port. The method includes:

[0006] In the target washing mode, the controller controls the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port;

[0007] The controller obtains the water pressure of the water spraying port of the washing pipeline;

[0008] When the difference between the determined water pressure of the water spraying port and the standard water spraying pressure associated with the target washing mode is greater than a set difference threshold, the controller adjusts the operating parameters of the drive motor according to the difference;

[0009] The controller returns to execute the step of controlling the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port until the difference between the determined water spray pressure of the water spray port and the standard water spray pressure is less than the difference threshold.

[0010] In one possible implementation, the controller determines the water pressure of the water outlet of the washing pipe according to the operating parameters of the drive motor, including:

[0011] The controller searches the pre-stored relationship table for the water pressure of the water outlet of the washing pipeline according to the operating parameters of the driving motor.

[0012] In one possible implementation, the operating parameters of the drive motor include the speed of the drive motor and the current flowing through the drive motor. The controller searches a pre-stored relationship table for the water pressure of the water outlet of the washing pipe based on the operating parameters of the drive motor, including:

[0013] The water pressure of the water outlet of the washing pipe that corresponds to the rotational speed of the driving motor and the current flowing through the driving motor is found from the pre-stored relationship table.

[0014] In one possible embodiment, a first water pressure sensor is provided at a water inlet or outlet of a washing water pump. After controlling a drive motor to drive the washing water pump to draw water outside the washing chamber into a washing pipe and spray it out from a water spray outlet, the method provided in the present application further includes:

[0015] The controller receives the water pressure of the washing water pump transmitted from the first water pressure sensor;

[0016] When the time between the current moment and the time of the last correction of the pre-recorded relationship table reaches a preset time, the controller determines the real-time water pressure of the water spraying port of the washing pipeline according to the water pressure of the washing water pump and the set adjustment coefficient;

[0017] The controller corrects the water spraying pressure of the water spraying port corresponding to the operating parameters of the driving motor in the relationship table according to the determined real-time water spraying pressure of the water spraying port.

[0018] In one possible implementation, the controller determines the water pressure of the water outlet of the washing pipe according to the operating parameters of the drive motor, including:

[0019] The controller inputs the operating parameters of the driving motor into the pre-trained water spray pressure determination model so that the water spray pressure determination model outputs the water spray pressure of the water spray outlet of the washing pipe, wherein the water spray pressure determination model is trained by inputting a training sample set consisting of multiple historical operating parameters of the driving motors and the corresponding historical water spray pressures of the water spray outlets of the washing pipe into the initial model to be trained.

[0020] In a possible embodiment, the controller obtains the water pressure of the water outlet of the washing pipe, including: the controller obtains the operating parameters of the drive motor; the controller determines the water pressure of the water outlet of the washing pipe according to the operating parameters of the drive motor.

[0021] In a second aspect, the present application further provides a method for controlling water pressure of a water spray port of a dishwasher, which is applied to a dishwasher. The dishwasher includes a controller, a drive motor, and a washing chamber. The controller is electrically connected to the drive motor. A washing pipe is provided in the washing chamber. A washing water pump is provided outside the washing chamber. The drive motor is used to drive the washing water pump. The washing water pump is connected to the washing pipe, and the washing pipe is provided with a water spray port. The method includes:

[0022] In the target washing mode, the controller controls the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port;

[0023] The controller obtains the operating power of the drive motor;

[0024] When the difference between the acquired operating power of the driving motor and the standard operating power associated with the target washing mode is greater than a set difference threshold, the controller performs magnetic field oriented control adjustment on the driving motor;

[0025] The controller returns to execute the step of controlling the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water outlet until the difference between the obtained operating power of the driving motor and the standard operating power associated with the target washing mode is less than the set difference threshold.

[0026] In a third aspect, the present application further provides a water pressure control device for a water spray port of a dishwasher, which is configured in a controller, the controller being applied to the dishwasher, the dishwasher further comprising a drive motor and a washing chamber, the controller being electrically connected to the drive motor, a washing pipe being provided in the washing chamber, a washing water pump being provided outside the washing chamber, the drive motor being used to drive the washing water pump, the washing water pump being in communication with the washing pipe, and the washing pipe being provided with a water spray port, the device comprising:

[0027] The motor control unit is used to control the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port in the target washing mode;

[0028] A parameter acquisition unit, used to acquire operating parameters of the drive motor;

[0029] A water pressure determination unit, for determining the water pressure of the water spraying outlet of the washing pipeline according to the operating parameters of the driving motor;

[0030] A parameter adjustment unit is used to adjust the operating parameters of the driving motor according to the difference when the difference between the determined water pressure of the water spraying outlet and the standard water pressure associated with the target washing mode is greater than a set difference threshold, and return to the step of controlling the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spraying outlet, until the difference between the determined water pressure of the water spraying outlet and the standard water pressure is less than the difference threshold.

[0031] In a fourth aspect, the present application also provides a dishwasher, which includes a controller, a drive motor, and a washing chamber. The controller is electrically connected to the drive motor. A washing pipe is provided in the washing chamber. A washing water pump is provided outside the washing chamber. The drive motor is used to drive the washing water pump to operate. The washing water pump is connected to the washing pipe, and the washing pipe is provided with a water spray port. The controller is used to execute the water pressure control method of the water spray port of the dishwasher provided in the first aspect of the present application.

[0032] In a fifth aspect, the present application provides a storage medium. When the instructions in the storage medium are executed by the controller of the dishwasher, the controller is able to execute the water pressure control method of the water spray port of the dishwasher provided in the first aspect of the present application.

[0033] The present application provides a method and device for controlling the water pressure of a dishwasher's water outlet, and a dishwasher. A controller obtains the water pressure of a water outlet of a washing pipe; when the difference between the determined water outlet water pressure and a standard water pressure associated with a target washing mode is greater than a set difference threshold, the controller adjusts the operating parameters of a drive motor based on the difference; and the controller returns to executing the step of controlling the drive motor to drive a washing water pump to draw water outside the washing chamber into the washing pipe and spray it out of the water outlet until the difference between the determined water outlet water pressure and the standard water pressure is less than the difference threshold. In this way, the pressure of the dishwasher's water outlet can be stabilized, enabling excellent dishwashing.

[0034] Alternatively, the controller can obtain the operating power of the drive motor; when the difference between the obtained operating power of the drive motor and the standard operating power associated with the target washing mode is greater than a set difference threshold, the drive motor is subjected to magnetic field oriented control and adjustment; and the process returns to the step of controlling the drive motor to drive the washing water pump to draw water from outside the washing chamber into the washing pipe and spray it out of the water spray port, until the difference between the obtained operating power of the drive motor and the standard operating power associated with the target washing mode is less than the set difference threshold. In this way, the power of the dishwasher's drive motor can be stabilized. It is understandable that when the power of the drive motor is stable, the flushing pressure of the dishwasher's water spray port is also stable, enabling excellent cleaning of dishes without the need for an additional water pressure sensor, resulting in low cost and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1A schematic diagram of the structure of a dishwasher provided in an embodiment of the present application;

[0037] Figure 2 This is a flow chart of a method for controlling water pressure of a water spray port of a dishwasher provided in an embodiment of the present application;

[0038] Figure 3 A flow chart of correcting the water pressure of a water pump at a water outlet provided in an embodiment of the present application;

[0039] Figure 4 This is a second flow chart of the method for controlling the water pressure of the water spray port of the dishwasher provided in an embodiment of the present application;

[0040] Figure 5 This is one of the functional module block diagrams of the water pressure control device for the water spray port of the dishwasher provided in an embodiment of the present application;

[0041] Figure 6 This is the second functional module block diagram of the water pressure control device for the water spray port of the dishwasher provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0043] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments of the present disclosure. These figures are not drawn to scale, and for the purpose of clarity, certain details are exaggerated and certain details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0044] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, it can be directly on the other layer / element or an intervening layer / element may be present therebetween. In addition, if a layer / element is "on" another layer / element in one orientation, it may be "below" the other layer / element when the orientation is reversed.

[0045] Below, the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0046] The embodiment of the present application provides a method for controlling the water pressure of a water spray port of a dishwasher, which is applied to a dishwasher 100. Figure 1 As shown, the dishwasher 100 may include a controller 101, a drive motor 102, and a washing chamber 106. The controller 101 may be, but is not limited to, a single chip microcomputer. The drive motor 102 may be, but is not limited to, a brushless DC motor. The controller 101 is electrically connected to the drive motor 102, a washing pipe 104 is provided in the washing chamber 106, a washing water pump 103 is provided outside the washing chamber 106, the drive motor 102 is used to drive the washing water pump 103 to operate, the washing water pump 103 is connected to the washing pipe 104, and the washing pipe 104 is provided with a water spray port 105. Figure 2 As shown, the method provided in the embodiment of the present application includes:

[0047] S201 : In the target washing mode, the controller 101 controls the driving motor 102 to drive the washing water pump 103 to draw water outside the washing chamber 106 into the washing pipe 104 and spray it out from the water spray port 105 .

[0048] It is understood that when the dishwasher 100 is washing dishes, multiple different washing modes may be used to better clean the dishes while also conserving energy. For example, the multiple washing modes may include a high-pressure rinse mode and a low-pressure rinse mode. The controller 101 may sequentially control the dishwasher 100 to operate in different washing modes according to pre-configured washing strategies, so as to effectively clean the dishes in the washing chamber 106.

[0049] Exemplarily, the target washing mode mentioned above may be a high-pressure flushing mode or a low-pressure flushing mode, etc., which is not limited here.

[0050] S202: The controller obtains the water pressure of the water spraying outlet of the washing pipeline.

[0051] Specifically, in some embodiments, a second water pressure sensor may be installed at the water outlet of the washing pipe, and the second water pressure sensor may collect the water pressure of the water outlet of the washing pipe and transmit it to the controller.

[0052] In other embodiments, the controller 101 can obtain the operating parameters of the drive motor 102 and determine the water pressure of the water outlet 105 of the washing pipe 104 based on the operating parameters of the drive motor 102. This eliminates the need to install a first water pressure sensor at the water outlet of the washing pipe, which is susceptible to dishwashing water corrosion, thereby saving costs and improving reliability.

[0053] Specifically, the drive motor 102 may include an operating parameter acquisition module (such as a current acquisition module, a voltage acquisition module, a speed acquisition module, etc.) of the drive motor 102. The drive motor 102 may acquire its own operating parameters (such as the speed of the rotor of the drive motor 102, the current flowing through the drive motor 102, and the voltage across the two ends of the drive motor 102).

[0054] Specifically, S202 may include but is not limited to the following two implementations:

[0055] The first method involves the controller 101 searching a pre-stored table based on the operating parameters of the drive motor 102 to determine the spray pressure at the water outlet 105 of the washing pipe 104. For example, the pre-stored table includes a one-to-one correspondence between the operating parameters of the drive motor 102 and the spray pressure. This table is established by historically testing multiple instances of the drive motor 102 operating parameters and the corresponding spray pressures in the dishwasher 100, resulting in a highly reliable result. Consequently, the spray pressure determined from the pre-stored table is also highly reliable.

[0056] For example, when the operating parameters of the drive motor 102 include the rotational speed of the drive motor 102 and the current flowing through the drive motor 102, the controller 101 can find the water pressure of the water outlet 105 of the washing pipe 104 that corresponds to the rotational speed of the drive motor 102 and the current flowing through the drive motor 102 from a pre-stored relationship table.

[0057] In addition, since the dishwasher 100 may be worn, blocked, etc. after being used for a long time, the correspondence between the operating parameters of the drive motor 102 and the water pressure of the spray water in the relationship table may be inaccurate. Therefore, the correspondence between the operating parameters of the drive motor 102 and the water pressure of the spray water in the relationship table needs to be corrected.

[0058] Specifically, the correction process can be as follows: a first water pressure sensor (not shown in the drawings) can be provided at the water inlet or outlet of the washing water pump 103, and the first water pressure sensor is electrically connected to the controller 101. It can be understood that since the washing water pump 103 is outside the washing chamber 106, the first water pressure sensor is also outside the washing chamber 106. In this way, the first water pressure sensor will not be corroded by the dishwashing water, and the collected data is highly reliable. After S201, if Figure 3 As shown, the method provided in the embodiment of the present application may further include:

[0059] S301: The controller 101 receives the water pressure of the washing water pump 103 transmitted from the first water pressure sensor.

[0060] For example, the first water pressure sensor may collect the water pressure flowing through the washing water pump 103 and transmit the collected water pressure to the controller 101. Furthermore, the controller 101 may receive the water pressure flowing through the washing water pump 103 transmitted from the first water pressure sensor.

[0061] S302: When the time between the current moment and the time of the last pre-recorded correction relationship table reaches the preset time, the controller 101 determines the real-time water spraying pressure of the water outlet 105 of the washing pipe 104 according to the water pump pressure of the washing water pump 103 and the set adjustment coefficient.

[0062] For example, the preset duration can be one day, one week, etc., which is not limited here. It is understandable that the preset duration can be the duration during which the dishwasher 100 is prone to wear and tear, etc. It is understandable that since the water pump is connected to the water outlet 105 of the washing pipe 104, the water pressure of the washing water pump 103 and the water pressure of the water outlet 105 are positively correlated. It should be noted that the above-mentioned adjustment coefficient can be obtained by the historical water pressure of the washing water pump 103 and the historical water pressure of the water outlet 105.

[0063] For example, the real-time water pressure of the water outlet 105 of the washing pipe 104 can be determined by the equation P1=αP2, where P1 is the real-time water pressure of the water outlet 105 of the washing pipe 104, α is the adjustment coefficient, and P2 is the water pressure of the washing water pump 103.

[0064] S303 : The controller 101 corrects the water spraying pressure of the water spraying port 105 corresponding to the operating parameters of the driving motor 102 in the relationship table according to the determined real-time water spraying pressure of the water spraying port 105 .

[0065] It can be understood that the mapping relationship between the operating parameters of the drive motor 102 and the real-time water pressure of the water outlet 105 of the washing pipe 104 represented in the revised relationship table is more reliable.

[0066] The second method: the controller 101 inputs the operating parameters of the driving motor 102 into the pre-trained water spray pressure determination model, so that the water spray pressure determination model outputs the water spray pressure of the water spray port 105 of the washing pipe 104.

[0067] The water spray pressure determination model is obtained by inputting a training sample set consisting of multiple historical operating parameters of the driving motors 102 and the corresponding historical water spray pressures of the water spray outlets 105 of the washing pipes 104 into the initial model to be trained.

[0068] Exemplarily, the initial model to be trained is a convolutional neural network or a decision tree model, which is not limited here. A convolutional neural network consists of an input layer, a hidden layer, and an output layer. In a convolutional neural network, the hidden layer includes a layer that performs convolution. Typically, this includes a layer that performs a dot product between the convolution kernel and the input matrix of the layer. This product is usually a Frobenius inner product, and its activation function is usually ReLU. When the convolution kernel slides along the input matrix of the layer, the convolution operation produces a feature map, which in turn contributes to the input of the next layer. This is followed by other layers such as pooling layers, fully connected layers, and normalization layers. Convolutional neural networks can be applied to image segmentation, data estimation, data classification, and other fields. The decision tree model is a tree-based model that makes predictions through a series of decision nodes and leaf nodes. Each node represents a feature, each edge represents a feature value, and the prediction result is obtained by traversing the tree.

[0069] S203: The controller 101 determines whether the difference between the determined water spraying pressure of the water spraying port 105 and the standard water spraying pressure associated with the target washing mode is greater than the set difference threshold. If yes, execute S204; if not, execute S205.

[0070] S204: The controller 101 adjusts the operating parameters of the drive motor 102 according to the difference and returns to execute S201.

[0071] S205: The controller 101 determines that the adjustment is completed.

[0072] It can be understood that the regulation process of S203-S205 can be understood as a proportional-integral (PI) process for regulating the water pressure of the water outlet 105. Based on the above-mentioned S204-S206, the water pressure of the water outlet 105 can be stabilized. Specifically, PI regulation combines the functions of proportional control and integral control.

[0073] Proportional control (P) generates a corresponding output signal based on the deviation of the current signal. This control method aims to quickly reduce the difference between input and output. Integral control (I) accumulates errors over a certain period of time and then amplifies them, thereby more effectively offsetting the accumulated errors within the system. Combining these two control methods, PI can achieve adaptive control of the regulated object (such as the operating parameters of drive motor 102) in complex environments, improving the stability of the regulated object.

[0074] It should be noted that when the operating parameters of the drive motor 102 include the speed of the drive motor 102 and the current flowing through the drive motor 102, the speed of the drive motor 102 can be first PI-regulated, and then the current flowing through the drive motor 102 can be PI-regulated. In this way, the water pressure of the water outlet 105 can be made more stable.

[0075] In addition, it should be noted that if Figure 1 As shown, the washing pipe 104 may include multiple pairs of water spray nozzles 105, for example, 3 pairs, 4 pairs, or 5 pairs of water spray nozzles 105, etc., which are not limited here. Each pair of water spray nozzles 105 is arranged relative to each other on the same horizontal plane. For example, when the washing pipe 104 includes 3 pairs of water spray nozzles 105, the 3 pairs of water spray nozzles 105 can be arranged in sequence from top to bottom, and the washing modes of the 3 pairs of water spray nozzles 105 can be the same or different. It should be noted that for each pair of water spray nozzles 105, the control method for maintaining the stability of the water pressure of the water spray can be the same as the process of S201-S206, which will not be repeated here.

[0076] In summary, the present embodiment provides a method for controlling water pressure at a dishwasher's water outlet. The controller 101 can obtain operating parameters of the drive motor 102 and, based on the operating parameters of the drive motor 102, determine the water pressure at the water outlet 105 of the washing pipe 104. When the difference between the determined water pressure at the water outlet 105 and the standard water pressure associated with the target washing mode is greater than a set difference threshold, the operating parameters of the drive motor 102 are adjusted based on the difference. The method then returns to executing the step of controlling the drive motor 102 to drive the wash water pump 103 to draw water from outside the washing chamber 106 into the washing pipe 104 and spray it out of the water outlet 105 until the difference between the determined water pressure at the water outlet 105 and the standard water pressure is less than the difference threshold. In this way, the pressure at the water outlet 105 of the dishwasher 100 can be stabilized, enabling excellent cleaning of dishes.

[0077] In addition, the embodiment of the present application also provides another method for controlling the water pressure of the water spray port of a dishwasher, which is also applied to the dishwasher 100. Figure 1 As shown, the dishwasher 100 includes a controller 101, a drive motor 102, and a washing chamber 106. The controller 101 is electrically connected to the drive motor 102. A washing pipe 104 is provided in the washing chamber 106. A washing water pump 103 is provided outside the washing chamber 106. The drive motor 102 is used to drive the washing water pump 103 to operate. The washing water pump 103 is connected to the washing pipe 104, and the washing pipe 104 is provided with a water spray port 105. Figure 4 As shown, the method provided in the embodiment of the present application includes:

[0078] S401 : In the target washing mode, the controller 101 controls the driving motor 102 to drive the washing water pump 103 to draw water outside the washing chamber 106 into the washing pipe 104 and spray it out from the water spray port 105 .

[0079] It should be noted that the principle of S401 is the same as that of the above-mentioned S201, and will not be described in detail here.

[0080] S402 : The controller 101 obtains the operating power of the drive motor 102 .

[0081] For example, the drive motor 102 may include a current acquisition module and a voltage acquisition module. The current acquisition module may acquire the current flowing through the drive motor 102 and transmit it to the controller 101. The voltage acquisition module may acquire the voltage across the drive motor 102 and transmit it to the controller 101. The controller 101 may obtain the operating power of the drive motor 102 based on the received current and voltage.

[0082] S403: The controller 101 determines whether the difference between the acquired operating power of the driving motor 102 and the standard operating power associated with the target washing mode is greater than a set difference threshold. If yes, execute S404; if not, execute S405.

[0083] S404: The controller 101 performs magnetic field oriented control on the drive motor 102 and returns to execute S401.

[0084] Field-Oriented Control (FOC) is a motor control strategy, also known as vector control, which controls the power of a drive motor 102 (such as a three-phase brushless DC motor) by controlling the amplitude and frequency of the inverter output voltage.

[0085] S405: Confirm that the adjustment is completed.

[0086] It should be noted that the adjustment process of S403-S405 can be understood as the process of proportional-integral PI (proportional-integral, PI) adjusting the power of the drive motor 102. Based on the above S204-S206, when the power of the drive motor 102 is stable, the water pressure of the water outlet 105 can also be stabilized.

[0087] In summary, the present invention provides a method for controlling water pressure at a dishwasher's water outlet. The controller 101 can obtain the operating power of the drive motor 102. When the difference between the obtained operating power of the drive motor 102 and the standard operating power associated with the target wash mode is greater than a set difference threshold, the controller 101 performs magnetic field-oriented control on the drive motor 102. The controller 101 then returns to the step of controlling the drive motor 102 to drive the wash water pump 103 to draw water from outside the wash chamber 106 into the wash pipe 104 and discharge it from the water outlet 105 until the difference between the obtained operating power of the drive motor 102 and the standard operating power associated with the target wash mode is less than the set difference threshold. In this manner, the power of the drive motor 102 of the dishwasher 100 can be stabilized. As can be appreciated, when the power of the drive motor 102 is stable, the flushing pressure at the water outlet 105 of the dishwasher 100 is also stable, enabling efficient dishwashing. This method eliminates the need for an additional water pressure sensor, resulting in low cost and high reliability.

[0088] See also Figure 5 The embodiment of the present application also provides a water pressure control device 500 for a water spray port of a dishwasher, which is configured in a controller 101. The controller 101 is applied to the dishwasher 100. The dishwasher 100 also includes a drive motor 102 and a washing chamber 106. The controller 101 is electrically connected to the drive motor 102 respectively. A washing pipe 104 is provided in the washing chamber 106. A washing water pump 103 is provided outside the washing chamber 106. The drive motor 102 is used to drive the washing water pump 103 to operate. The washing water pump 103 is connected to the washing pipe 104, and the washing pipe 104 is provided with a water spray port 105.

[0089] It should be noted that the basic principle and technical effects of the water pressure control device 500 for the water spray port of the dishwasher provided in the embodiment of the present application are the same as those of the above embodiment. For the sake of brief description, for parts not mentioned in this embodiment, please refer to the corresponding contents in the above embodiment. Figure 5 As shown, the device 500 provided in the embodiment of the present application includes a motor control unit 501, a water pressure determination unit 502, and a parameter adjustment unit 503, wherein:

[0090] The motor control unit 501 is used to control the driving motor 102 to drive the washing water pump 103 to draw water outside the washing chamber 106 into the washing pipe 104 and spray it out from the water spray port 105 in the target washing mode.

[0091] The water pressure determination unit 502 is used to obtain the water pressure of the water spraying outlet of the washing pipeline.

[0092] The parameter adjustment unit 503 is used to adjust the operating parameters of the driving motor 102 according to the difference when the difference between the determined water spraying pressure of the water spraying outlet 105 and the standard water spraying pressure associated with the target washing mode is greater than the set difference threshold, and return to the step of controlling the driving motor 102 to drive the washing water pump 103 to draw water outside the washing chamber 106 into the washing pipe 104 and spray it out from the water spraying outlet 105, until the difference between the determined water spraying pressure of the water spraying outlet 105 and the standard water spraying pressure is less than the difference threshold.

[0093] In a possible implementation, the water pressure determination unit 502 is specifically configured to search for the spraying water pressure of the water outlet 105 of the washing pipe 104 from a pre-stored relationship table according to the operating parameters of the drive motor 102 .

[0094] Furthermore, the operating parameters of the drive motor 102 include the speed of the drive motor 102 and the current flowing through the drive motor 102. The water pressure determination unit 502 is specifically used to find the water pressure of the water outlet 105 of the washing pipe 104 that corresponds to the speed of the drive motor 102 and the current flowing through the drive motor 102 from a pre-stored relationship table.

[0095] In one possible embodiment, a first water pressure sensor is provided at the water inlet or outlet of the washing water pump 103. The apparatus 500 provided in this embodiment of the present application may further include a parameter correction unit configured to receive the water pressure of the washing water pump 103 transmitted from the first water pressure sensor; determine the real-time water pressure of the water outlet 105 of the washing pipe 104 based on the water pressure of the washing water pump 103 and a set adjustment coefficient when the duration between the current moment and the moment of the last correction in the pre-recorded relationship table reaches a preset duration; and correct the water pressure of the water outlet 105 corresponding to the operating parameters of the drive motor 102 in the relationship table based on the determined real-time water pressure of the water outlet 105.

[0096] In another possible embodiment, the water pressure determination unit 502 is specifically used to input the operating parameters of the drive motor 102 into a pre-trained water spray pressure determination model, so that the water spray pressure determination model outputs the water spray pressure of the water spray outlet 105 of the washing pipe 104, wherein the water spray pressure determination model is obtained by inputting a training sample set consisting of multiple historical operating parameters of the drive motor 102 and corresponding historical water spray pressures of the water spray outlet 105 of the washing pipe 104 into the initial model to be trained.

[0097] Exemplarily, the initial model to be trained is a convolutional neural network or a decision tree model.

[0098] In a possible implementation, the water pressure determination unit 502 is specifically used to obtain the operating parameters of the drive motor; the controller determines the water pressure of the water spraying outlet of the washing pipe according to the operating parameters of the drive motor.

[0099] Also, see Figure 6 , the embodiment of the present application also provides another water pressure control device 600 for the water spray port of a dishwasher, which is configured in the controller 101. The controller 101 is configured in the dishwasher 100, and the dishwasher 100 also includes a drive motor 102 and a washing chamber 106. The controller 101 is electrically connected to the drive motor 102 respectively. A washing pipe 104 is provided in the washing chamber 106, and a washing water pump 103 is provided outside the washing chamber 106. The drive motor 102 is used to drive the washing water pump 103 to operate. The washing water pump 103 is connected to the washing pipe 104, and the washing pipe 104 is provided with a water spray port 105. It should be noted that the basic principle and technical effects of the water pressure control device 600 for the water spray port of the dishwasher provided in the embodiment of the present application are the same as those in the above embodiment. For the sake of brief description, for parts not mentioned in this embodiment, please refer to the corresponding content in the above embodiment. The device 600 provided in the embodiment of the present application includes a motor control unit 601, a power acquisition unit 602, and a power adjustment unit 603, wherein,

[0100] The motor control unit 601 is used to control the driving motor 102 to drive the washing water pump 103 to draw water outside the washing chamber 106 into the washing pipe 104 and spray it out from the water spray port 105 in the target washing mode;

[0101] The power acquisition unit 602 is used for the controller 101 to obtain the operating power of the drive motor 102;

[0102] The power regulation unit 603 performs magnetic field oriented control on the drive motor 102 when the difference between the obtained operating power of the drive motor 102 and the standard operating power associated with the target washing mode is greater than the set difference threshold, and returns to execute the step of controlling the drive motor 102 to drive the washing water pump 103 to draw water outside the washing chamber 106 into the washing pipe 104 and spray it out from the water outlet 105, until the difference between the obtained operating power of the drive motor 102 and the standard operating power associated with the target washing mode is less than the set difference threshold.

[0103] In addition, an embodiment of the present application also provides a dishwasher, which includes a controller, a drive motor, and a washing chamber. The controller is electrically connected to the drive motor. A washing pipe is provided in the washing chamber. A washing water pump is provided outside the washing chamber. The drive motor is used to drive the washing water pump to operate. The washing water pump is connected to the washing pipe, and the washing pipe is provided with a water spray outlet. The controller is used to execute the water pressure control method of the water spray outlet of the dishwasher provided in the above embodiment of the present application.

[0104] Specifically, the controller may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of the hardware in the controller or an instruction in the form of software. The above controller can be a general-purpose processor (for example, a microprocessor or a conventional processor), a digital signal processor (digital signal processing, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field-programmable gate array (field-programmable gate array, FPGA) or other programmable logic devices, discrete gates, transistor logic devices or discrete hardware components. The controller can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0105] In addition, an embodiment of the present application provides a storage medium. When the instructions in the storage medium are executed by the controller of the dishwasher, the controller can execute the water pressure control method of the water spray port of the dishwasher provided in the above embodiment of the present application.

[0106] In addition, an embodiment of the present application further provides a computer program product, including a computer program. When the computer program is executed, it causes a computer to execute the process scheduling method described in the first aspect or any one of the implementations of the first aspect. The computer program product may be pre-written in a memory or downloaded and installed in the memory in the form of software. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a portion of code, and the module, program segment or a portion of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0108] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0109] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0110] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention. It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

Claims

1. A method for controlling the water pressure of a water spray port of a dishwasher, characterized in that: The method is applied to a dishwasher, the dishwasher comprising a controller, a drive motor, and a washing chamber, the controller being electrically connected to the drive motor, a washing pipe being provided in the washing chamber, a washing water pump being provided outside the washing chamber, the drive motor being used to drive the washing water pump, the washing water pump being in communication with the washing pipe, and the washing pipe being provided with a water spray port, the method comprising: In the target washing mode, the controller controls the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port; The controller obtains the water pressure of the water spraying port of the washing pipeline; When the difference between the determined water pressure of the water spraying port and the standard water pressure associated with the target washing mode is greater than a set difference threshold, the controller adjusts the operating parameters of the driving motor according to the difference; The controller returns to execute the step of controlling the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port until the difference between the determined water spray pressure of the water spray port and the standard water spray pressure is less than the difference threshold.

2. The method according to claim 1, characterized in that The controller determines the water pressure of the water spraying port of the washing pipe according to the operating parameters of the driving motor, including: The controller searches for the water pressure of the water outlet of the washing pipe from a pre-stored relationship table according to the operating parameters of the driving motor.

3. The method according to claim 2, characterized in that The operating parameters of the drive motor include the speed of the drive motor and the current flowing through the drive motor. The controller searches for the water pressure of the water outlet of the washing pipe from a pre-stored relationship table based on the operating parameters of the drive motor, including: The water pressure of the water outlet of the washing pipe that corresponds to the rotational speed of the driving motor and the current flowing through the driving motor is found from the pre-stored relationship table.

4. The method according to claim 2, characterized in that A first water pressure sensor is provided at a water inlet or a water outlet of the washing water pump. After controlling the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port, the method further includes: The controller receives the water pressure of the washing water pump flowing through the washing water pump transmitted from the first water pressure sensor; The controller determines the real-time water pressure of the water outlet of the washing pipe according to the water pressure of the washing water pump and a set adjustment coefficient when the time between the current time and the pre-recorded time when the relationship table was last modified reaches a preset time; The controller corrects the water spraying pressure of the water spraying port corresponding to the operating parameters of the driving motor in the relationship table according to the determined real-time water spraying pressure of the water spraying port.

5. The method according to claim 1, wherein The controller determines the water pressure of the water spraying port of the washing pipe according to the operating parameters of the driving motor, including: The controller inputs the operating parameters of the drive motor into a pre-trained water spray pressure determination model so that the water spray pressure determination model outputs the water spray pressure of the water spray outlet of the washing pipe, wherein the water spray pressure determination model is obtained by inputting a training sample set consisting of multiple historical operating parameters of the drive motors and the corresponding historical water spray pressures of the water spray outlets of the washing pipe into the initial model to be trained.

6. The method according to claim 1, characterized in that The controller obtains the water pressure of the water spraying port of the washing pipeline, including: The controller obtains the operating parameters of the drive motor; The controller determines the water pressure of the water spraying port of the washing pipe according to the operating parameters of the driving motor.

7. A method for controlling the water pressure of a water spray port of a dishwasher, characterized in that: The method is applied to a dishwasher, the dishwasher comprising a controller, a drive motor, and a washing chamber, the controller being electrically connected to the drive motor, a washing pipe being provided in the washing chamber, a washing water pump being provided outside the washing chamber, the drive motor being used to drive the washing water pump, the washing water pump being in communication with the washing pipe, and the washing pipe being provided with a water spray port, the method comprising: In the target washing mode, the controller controls the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port; The controller obtains the operating power of the driving motor; The controller performs magnetic field oriented control on the drive motor when the difference between the acquired operating power of the drive motor and the standard operating power associated with the target washing mode is greater than a set difference threshold; The controller returns to execute the step of controlling the driving motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water outlet until the difference between the obtained operating power of the driving motor and the standard operating power associated with the target washing mode is less than the set difference threshold.

8. A water pressure control device for a water spray port of a dishwasher, characterized in that: The device is configured in a controller, the controller is applied to a dishwasher, the dishwasher further includes a drive motor and a washing chamber, the controller is electrically connected to the drive motor, a washing pipe is provided in the washing chamber, a washing water pump is provided outside the washing chamber, the drive motor is used to drive the washing water pump to operate, the washing water pump is conductively connected to the washing pipe, and the washing pipe is provided with a water spray port. The device includes: a motor control unit, configured to control the drive motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spray port in a target washing mode; a water pressure determination unit, configured to obtain the water pressure of the water spraying port of the washing pipeline; A parameter adjustment unit is used to adjust the operating parameters of the drive motor according to the difference between the determined water pressure of the water spraying outlet and the standard water pressure associated with the target washing mode when the difference is greater than a set difference threshold; and return to the step of controlling the drive motor to drive the washing water pump to draw water outside the washing chamber into the washing pipe and spray it out from the water spraying outlet until the difference between the determined water pressure of the water spraying outlet and the standard water pressure is less than the difference threshold.

9. A dishwasher, characterized in that: The dishwasher includes a controller, a drive motor, and a washing chamber, the controller is electrically connected to the drive motor, a washing pipe is provided in the washing chamber, a washing water pump is provided outside the washing chamber, the drive motor is used to drive the washing water pump to operate, the washing water pump is connected to the washing pipe, and the washing pipe is provided with a water spray outlet, wherein the controller is used to execute the water pressure control method of the water spray outlet of the dishwasher according to any one of claims 1-7.

10. A storage medium, when instructions in the storage medium are executed by a controller of a dishwasher, enables the controller to execute the water pressure control method of a water spray port of a dishwasher according to any one of claims 1 to 7.

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