A dishwasher and a control method thereof

Abstract

The embodiment of the application provides a kind of dish washer and its control method, it is related to dish washer technical field.The dish washer includes: inner container, rotatably arranged in inner container in spray arm, magnetic pole conversion electromagnet, pressure action switch and controller;Controller is configured to: in response to receiving the instruction of executing washing program, if the pressure value of water flow sprayed by spray hole is greater than preset pressure value in target stage of washing program, first pressure action switch and second pressure action switch are triggered alternately;If the switch of first pressure action switch triggers, control first electric current to flow through magnetic pole conversion electromagnet, so that repulsion between magnetic pole conversion electromagnet and magnetic force spray arm is generated;If the switch of second pressure action switch triggers, control second electric current to flow through magnetic pole conversion electromagnet, so that attraction between magnetic pole conversion electromagnet and magnetic force spray arm is generated.The dish washer provided by the embodiment of the application can utilize electromagnetic drive spray arm rotation, and then the rotation speed of spray arm can be improved.

Description

Technical Field

[0001] This application relates to the field of dishwasher technology, and more particularly to a dishwasher and its control method. Background Technology

[0002] Most current dishwashers feature a three-spray-arm design, where water jets from nozzles drive the arms to rotate and perform the washing process. However, the rotation speed of the spray arms is usually low, resulting in a low frequency of water splashes on the dishes per unit time and poor washing performance.

[0003] Existing methods for increasing the rotational speed of the spray arm typically involve: designing the spray nozzles of the spray arm at an angle so that the sprayed water becomes the rotational power; or designing accelerating spray nozzles. However, both of these methods require dissipating water power, meaning that the water flow is not fully used for splash cleaning of the tableware.

[0004] Therefore, how to increase the spray arm speed of the dishwasher has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a dishwasher and its control method, which can use electromagnetic drive to rotate the spray arm, thereby increasing the spray arm speed of the dishwasher.

[0006] In a first aspect, embodiments of this application provide a dishwasher, comprising: an inner tub, a spray arm rotatably disposed within the inner tub, a magnetic pole changing electromagnet, a pressure actuation switch, and a controller; the spray arm includes a magnetic spray arm and a non-magnetic spray arm fixedly connected, the magnetic spray arm having a magnet disposed thereon, and the non-magnetic spray arm having spray holes disposed thereon; the magnetic pole changing electromagnet and the pressure actuation switch are disposed inside the inner tub; the pressure actuation switch includes a first pressure actuation switch and a second pressure actuation switch; the controller is configured to: in response to receiving an instruction to execute a washing program, during a target stage of the washing program, if the pressure value of the water flow ejected from the spray holes is greater than a preset pressure value, alternately trigger the first pressure actuation switch and the second pressure actuation switch; if the first pressure actuation switch is triggered, control a first current to flow through the magnetic pole changing electromagnet, causing a repulsive force to be generated between the magnetic pole changing electromagnet and the magnetic spray arm; if the second pressure actuation switch is triggered, control a second current to flow through the magnetic pole changing electromagnet, causing an attractive force to be generated between the magnetic pole changing electromagnet and the magnetic spray arm.

[0007] The dishwasher provided in this application includes a magnetic spray arm and a non-magnetic spray arm. The magnetic spray arm can generate an attractive or repulsive force with a magnetic pole-changing electromagnet to drive the spray arm to rotate. The non-magnetic spray arm has spray holes at both ends to spray water to clean dishes. During the target stage of the washing program, if the pressure of the water sprayed from the spray holes exceeds a preset pressure value, the controller alternately triggers a first pressure action switch and a second pressure action switch, causing an attractive or repulsive force to be generated between the magnetic pole-changing electromagnet and the magnetic spray arm to drive the spray arm to rotate. In this way, during the target stage of the washing program, the dishwasher does not need to use water to drive the spray arm to rotate; instead, it can use electromagnetic drive to rotate the spray arm, thereby increasing the spray arm speed and allowing the water flow to be fully used for splash cleaning of the dishes, achieving water conservation.

[0008] In conjunction with the first implementation of the first aspect, the tilt angle of the spray nozzles on the non-magnetic spray arm is greater than a preset angle; the controller is also configured to: control the non-magnetic spray arm to release water pressure during the target stage of the washing program to drive the spray arm to rotate; if the pressure value of the water flow ejected from the nozzle is greater than a preset pressure value, alternately trigger the first pressure action switch and the second pressure action switch, including: after a first preset time, counting the number of times the pressure value is greater than the preset pressure value; in response to the number reaching a preset number, if the pressure value of the water flow ejected from the nozzle is greater than the preset pressure value, alternately trigger the first pressure action switch and the second pressure action switch.

[0009] In conjunction with the second implementation of the first aspect, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, before alternately triggering the first pressure action switch and the second pressure action switch, the controller is also configured to: determine the first current and / or the current intensity of the second current according to the gear selected by the user.

[0010] In conjunction with the third implementation of the first aspect, the controller is also configured to: during the target stage of the washing program, count the running time of the target stage; in response to the time difference between the set time of the target stage and the running time being equal to a preset time, determine that the current intensity of the first current and the second current is 0, or, in response to the time difference between the set time of the target stage and the running time being equal to a second preset time, stop triggering the pressure action switch.

[0011] In conjunction with the fourth implementation of the first aspect, the dishwasher also includes a display; the display is used to show the rotational speed of the spray arm; the controller is also configured to: determine the rotational speed of the spray arm based on the number of times the first pressure action switch is triggered and the running time; and send the rotational speed of the spray arm to the display so that the display shows the rotational speed of the spray arm.

[0012] Secondly, embodiments of this application provide a control method for a dishwasher. The dishwasher includes: an inner tub, a spray arm rotatably disposed within the inner tub, a magnetic pole changing electromagnet, a pressure actuation switch, and a controller. The spray arm includes a magnetic spray arm and a non-magnetic spray arm fixedly connected. The magnetic spray arm is provided with a magnet, and the non-magnetic spray arm is provided with spray holes. The magnetic pole changing electromagnet and the pressure actuation switch are disposed inside the inner tub. The pressure actuation switch includes a first pressure actuation switch and a second pressure actuation switch. The control method includes: in response to receiving an instruction to execute a washing program, during a target stage of the washing program, if the pressure value of the water flow ejected from the spray holes is greater than a preset pressure value, alternately triggering the first pressure actuation switch and the second pressure actuation switch; if the first pressure actuation switch is triggered, controlling a first current to flow through the magnetic pole changing electromagnet, causing a repulsive force between the magnetic pole changing electromagnet and the magnetic spray arm; if the second pressure actuation switch is triggered, controlling a second current to flow through the magnetic pole changing electromagnet, causing an attractive force between the magnetic pole changing electromagnet and the magnetic spray arm.

[0013] In conjunction with the first implementation of the second aspect, the tilt angle of the spray nozzles on the non-magnetic spray arm is greater than a preset angle; the control method further includes: during the target stage of the washing program, controlling the non-magnetic spray arm to release water pressure to drive the spray arm to rotate; if the pressure value of the water flow ejected from the nozzle is greater than a preset pressure value, alternately triggering the first pressure action switch and the second pressure action switch, including: after a first preset time, counting the number of times the pressure value is greater than the preset pressure value; in response to the number reaching a preset number, if the pressure value of the water flow ejected from the nozzle is greater than the preset pressure value, alternately triggering the first pressure action switch and the second pressure action switch.

[0014] In conjunction with the second implementation method of the second aspect, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, before alternately triggering the first pressure action switch and the second pressure action switch, the control method further includes: determining the first current and / or the current intensity of the second current according to the gear selected by the user.

[0015] In conjunction with the third implementation method of the second aspect, the control method further includes: during the target stage of the washing program, calculating the running time of the target stage; in response to the time difference between the set time of the target stage and the running time being equal to a preset time, determining that the current intensity of the first current and the second current is 0, or, in response to the time difference between the set time of the target stage and the running time being equal to a second preset time, stopping the triggering of the pressure action switch.

[0016] In conjunction with the fourth implementation of the second aspect, the dishwasher also includes a display; the display is used to show the rotational speed of the spray arm; the control method further includes: determining the rotational speed of the spray arm based on the number of times the first pressure action switch is triggered and the running time; sending the rotational speed of the spray arm to the display so that the display shows the rotational speed of the spray arm.

[0017] Thirdly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes any of the control methods provided in the second aspect and possible implementations.

[0018] Fourthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when controlled on a computer, cause the computer to perform any of the control methods provided in the second aspect and possible implementations.

[0019] Fifthly, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement any of the control methods provided in the second aspect and possible implementations.

[0020] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor, or it may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0021] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of a dishwasher provided in an embodiment of this application;

[0024] Figure 2 A top view of the spray arm of a dishwasher provided in an embodiment of this application;

[0025] Figure 3 A front view of a dishwasher provided in an embodiment of this application;

[0026] Figure 4 A schematic diagram of a washing procedure provided in an embodiment of this application;

[0027] Figure 5This is a schematic diagram of the rotation of a spray arm provided in an embodiment of this application;

[0028] Figure 6 A schematic diagram of the rotation of another spray arm provided in an embodiment of this application;

[0029] Figure 7 A flowchart illustrating a trigger pressure-operated switch provided in this application embodiment;

[0030] Figure 8 A flowchart for stopping the use of magnetic drive is provided in an embodiment of this application;

[0031] Figure 9 This application provides a schematic diagram of a washing process according to an embodiment of the present application.

[0032] Figure 10 A flowchart illustrating the operation of a dishwasher during the target stage, as provided in this application embodiment;

[0033] Figure 11 A flowchart illustrating the rotational speed of a spray arm is provided as an embodiment of this application;

[0034] Figure 12 A flowchart illustrating a method for triggering a pressure-operated switch, as provided in this application embodiment;

[0035] Figure 13 A flowchart illustrating a method for stopping the use of magnetic drive, as provided in an embodiment of this application;

[0036] Figure 14 A flowchart illustrating a method for a dishwasher to run in the target stage, as provided in this application embodiment;

[0037] Figure 15 A flowchart illustrating a method for displaying the rotational speed of a spray arm, provided in an embodiment of this application;

[0038] Figure 16 This is a schematic diagram of the hardware architecture of an electronic device provided in an embodiment of this application. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that the terms "first" and "second" used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0042] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] Figure 1 The diagram shown is a structural schematic of a dishwasher provided in an embodiment of this application. Please refer to [link / reference]. Figure 1 The dishwasher 100 includes: a casing 11, an inner tub 12, a spray arm 13, a shelf 14, a base 15, and a door. Figure 1 (Not shown in the image).

[0044] The outer shell 11 is located outside the inner liner 12 and is used to protect the inner liner 12.

[0045] The spray arm 13 is rotatably mounted inside the inner tank 12 and can clean the tableware on the shelf 14 by spraying washing water. The spray arm 13 is a hollow shell with spray nozzles for spraying washing water onto the tableware on the shelf 14. Figure 1 (Not shown in the image). It should be understood that the spray arm 13 may include an upper spray arm, a middle spray arm, and a lower spray arm.

[0046] In some embodiments, the spray holes on the spray arm 13 are inclined, so that the spray arm can be driven to rotate by the jet of water.

[0047] In some embodiments, the spray arm 13 may also have a rotary drive hole for driving the spray arm to rotate.

[0048] Shelf 14 is located inside the inner liner 12 and is used to hold tableware such as bowls, plates, or cups. Figure 1 As shown, the shelf 14 may include an upper shelf 141 and a lower shelf 142.

[0049] The base 15 is used to supply washing water to the spray arm 13, so that the spray arm 13 can clean the tableware on the shelf 14 by spraying washing water.

[0050] In some embodiments, the base 15 may include a water tank 151 and a washing pump 152. The water tank is used to hold washing water, and the washing pump is used to drive the washing water in the water tank to the spray arm 13.

[0051] In some embodiments, the dishwasher also includes a drain pump for removing residual water after washing, that is, the washing water sprayed by the spray arm, which can be discharged from the dishwasher by the drain pump.

[0052] In some embodiments, the dishwasher also includes a dispenser for dispensing dishwasher detergent or rinse aid into the dishwasher.

[0053] In some embodiments, the dishwasher also includes a display, which may be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display. The specific type, size, and resolution of the display are not limited. The display 106 can be used to display the dishwasher's control panel. The dishwasher can use the display to provide feedback on its current operating status, such as running time and spray arm speed.

[0054] In some embodiments, the dishwasher may also include a heater for heating the wash water to improve the washing effect.

[0055] In some embodiments, the dishwasher may also include a fan assembly for drying the surface of the dishes after washing, thereby improving the user experience.

[0056] In some embodiments, the dishwasher also includes a controller, which is the control center of the dishwasher 100. The controller connects to various parts of the dishwasher via various interfaces and lines, and executes various washing programs of the dishwasher by running or executing programs stored in memory and calling data stored in memory. In some embodiments, the controller may include one or more processing units.

[0057] In some embodiments, a controller refers to a device that can generate operation control signals based on instruction opcodes and timing signals, instructing the washing pump and dispenser to execute control instructions. Exemplarily, the controller can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller can also be other devices with processing capabilities, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0058] Those skilled in the art will understand that Figure 1 The hardware structure shown does not constitute a limitation on the dishwasher. The dishwasher may include more or fewer components than shown, or combine certain components, or have different component arrangements. This application embodiment does not impose any limitations in this regard.

[0059] Existing dishwashers typically use water flow to drive the spray arm to rotate and spray water for washing. However, the rotation speed of the spray arm driven by water flow is usually low, resulting in a low frequency of water splashing on the dishes per unit time and poor washing effect.

[0060] Existing methods for increasing the rotational speed of the spray arm typically involve: tilting the spray nozzles of the spray arm so that the sprayed water acts as the rotational force; or designing accelerating spray nozzles. However, both of these methods require dissipating water power, meaning the water flow is not fully utilized for splash cleaning of the tableware, resulting in energy waste.

[0061] Based on this, please refer to Figure 2 , Figure 2 This is a top view of the spray arm of a dishwasher provided as an embodiment of this application. Please refer to... Figure 2 The dishwasher 100 provided in this application embodiment includes a spray arm 13 comprising a magnetic spray arm 131 and a non-magnetic spray arm 132 fixedly connected. The magnetic spray arm has magnets 1311 at both ends, and the non-magnetic spray arm has spray holes 1322 at both ends.

[0062] It should be understood that, such as Figure 2 As shown, in this embodiment of the application, the magnets at both ends of the magnetic spray arm are used as N poles on the outside ( Figure 2 The white part of the 1311 magnet), the S pole is on the inside ( Figure 2 (Taking the oblique section of the magnet 1311 as an example). In some embodiments, the magnets at both ends of the magnetic spray arm may also have the S pole on the outside.

[0063] Please continue reading. Figure 2 The dishwasher 100 provided in this application embodiment also includes: a magnetic pole changing electromagnet 16 and a pressure action switch 17, which are disposed inside the inner tub.

[0064] The magnetic pole changing electromagnet 16 is used to generate attraction or repulsion between itself and the magnetic spray arm 131 to drive the spray arm to rotate. The working principle of the pressure action switch 17 is as follows: when the received pressure value is higher or lower than the rated preset pressure, the disc inside the sensor moves instantaneously, pushing the switch connector to open or close through the connecting rod. When the pressure drops or rises to the rated recovery value, the disc resets instantaneously, and the switch automatically resets. Or, simply put, when the measured pressure exceeds the rated value, the free end of the elastic element is displaced, directly or after comparison, pushing the switch element to change the on / off state of the switch element, thereby controlling other components.

[0065] In some embodiments, the elastic element used in the pressure-operated switch 17 includes a single-turn Bourdon tube, a diaphragm, a diaphragm capsule, and a bellows.

[0066] Please continue reading. Figure 2 The pressure actuation switch 17 includes a first pressure actuation switch 171 and a second pressure actuation switch 172.

[0067] In some embodiments, such as Figure 3 As shown, the height of the magnetic pole changing electromagnet 16 is the same as the height of the spray arm 13. This ensures that the direction of the force on the spray arm 13 is in the same horizontal plane as the spray arm 13, thereby ensuring the stability of the rotation of the spray arm 13 and preventing the spray arm 13 from swaying up and down.

[0068] It should be understood that Figure 3 This is merely an illustrative example of an application scenario where the spray arm is a middle spray arm. In actual use, the spray arm can be a middle spray arm, and / or an upper spray arm, and / or a lower spray arm. This application embodiment does not limit this.

[0069] The dishwasher provided in this application embodiment has a controller configured to: in response to receiving an instruction to execute a washing program, during the target stage of the washing program, if the pressure value of the water jet from the nozzle is greater than a preset pressure value, alternately trigger a first pressure action switch and a second pressure action switch.

[0070] Specifically, if the first pressure action switch 171 is triggered, the first current is controlled to flow through the magnetic pole changing electromagnet, so that a repulsive force is generated between the magnetic pole changing electromagnet and the magnetic spray arm; if the second pressure action switch 172 is triggered, the second current is controlled to flow through the magnetic pole changing electromagnet, so that an attractive force is generated between the magnetic pole changing electromagnet and the magnetic spray arm.

[0071] It should be understood that during the target stage of operation, the nozzles of the non-magnetic spray arm will spray water to wash the dishes. The dishwasher provided in this application embodiment uses the pressure value of the water sprayed from the nozzles, that is, the pressure value received by the pressure action switch when the water sprayed from the nozzles impacts the pressure action switch, to trigger the pressure action switch.

[0072] After the user selects a washing mode for the dishwasher, such as the intensive wash mode, the controller will execute the corresponding washing program based on the user's selection. Please refer to [link / reference]. Figure 4 The washing program 40 may include the following steps executed in sequence: pre-wash stage 41, main wash stage 42, cold rinsing stage 43, hot rinsing stage 44, and drying stage 45.

[0073] The process includes the following stages: Pre-wash stage 41 primarily uses a washing pump to spray water through the spray arm to rinse the tableware surface; Main wash stage 42 primarily uses a heater to heat the water to warm (hot) water, and then uses a washing pump to spray the warm (hot) water through the spray arm to powerfully rinse the tableware, adding detergent to remove dirt and grease. The main wash stage uses multiple water intakes, and the washing water is also recycled; Cold rinse stage 43 primarily uses a washing pump to spray clean water through the spray arm to rinse the tableware surface; Hot rinse stage 44 primarily uses a heater to heat the water to warm (hot) water, and then uses a washing pump to spray the warm (hot) water through the spray arm to clean the tableware, achieving both cleaning and disinfection; Drying stage 45 primarily uses a heater and / or fan assembly to dry the tableware surface.

[0074] As can be seen, the main wash stage 42 and the hot rinse stage 44 are the main washing stages of the washing program, which have a long running time and require the spray arm to spray water. Therefore, the main wash stage and the hot rinse stage of the washing program can be regarded as the target stages. That is to say, during the main wash stage and the hot rinse stage of the washing program, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are alternately triggered, so that the magnetic pole changing electromagnet and the magnetic spray arm generate an attractive or repulsive force, thereby driving the spray arm to rotate, so that the water jet from the spray arm can better rinse the dishes.

[0075] As a feasible implementation method, the first current refers to controlling the current flowing through the pole-changing electromagnet to be a positive current. Please refer to [link / reference]. Figure 5 When the current flowing through the pole-changing electromagnet is a positive current, the inner side of the electromagnet is the N pole, which has the same polarity as the magnet on the magnetic spray arm. This creates a repulsive force between the electromagnet and the magnetic spray arm, driving the magnetic spray arm to rotate from a horizontal position. It should be understood that... Figure 5The solid arrow in the middle is only an example of the spray arm rotating counterclockwise. In practical applications, the spray arm can also rotate clockwise. This application does not limit this in any way.

[0076] As a feasible implementation method, the second current refers to controlling the current flowing through the pole-changing electromagnet to be a reverse current. Please refer to [link / reference needed]. Figure 6 When the current flowing through the pole-changing electromagnet is a reverse current, the inner side of the electromagnet becomes the S pole, which is opposite to the polarity of the magnet on the magnetic spray arm. This creates an attractive force between the electromagnet and the magnetic spray arm, driving the magnetic spray arm to rotate from a vertical position. It should be understood that... Figure 6 The solid arrow in the middle is only an example of the spray arm rotating counterclockwise. In practical applications, the spray arm can also rotate clockwise. This application does not limit this in any way.

[0077] In some embodiments, the tilt angle of the nozzles at both ends of the non-magnetic spray arm is greater than a preset angle. That is, when the nozzles at both ends of the non-magnetic spray arm spray water, the spray arm can be driven to rotate by water pressure. In this way, during operation, the spray arm can be driven to rotate by both water pressure and electromagnetic drive.

[0078] Based on this, the dishwasher provided in this application embodiment is further configured to: control the non-magnetic spray arm to release water pressure during the target stage of the washing program, so as to drive the spray arm to rotate.

[0079] Please see Figure 7 If the pressure of the water jet from the nozzle exceeds the preset pressure value, the first pressure action switch and the second pressure action switch are triggered alternately, including S701-S702:

[0080] S701. After the first preset time, count the number of times the pressure value is greater than the preset pressure value.

[0081] Because the spray arm has water pressure drive capability, it can be driven to rotate by the water flow ejected from the nozzles at both ends of the non-magnetic spray arm. Therefore, during the first preset time of operation in the target stage, the spray arm is driven to rotate by water pressure. After the first preset time, the spray arm is driven to rotate by electromagnetic force.

[0082] To prevent blockage of the pipes in the spray arm, which would prevent water from spraying out properly and thus cause the electromagnetically driven spray arm to rotate without water to add weight and resulting in excessively high rotation speed, the following measures are taken before the electromagnetically driven spray arm rotates: the number of times the pressure value exceeds the preset pressure value is counted, which is the number of times the first pressure action switch is triggered, or the number of times the water jet from the nozzles of the non-magnetic spray arm hits the first pressure action switch.

[0083] S702. In response to the number of times being reached, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are alternately triggered.

[0084] When the number of times the first pressure action switch is triggered reaches a preset number, indicating that the nozzle of the non-magnetic spray arm can spray water, the electromagnetic drive for the spray arm to rotate is started, which can effectively avoid the problem of excessively high spray arm speed during electromagnetic drive.

[0085] It should be understood that the first preset time and preset number of times are preset by the system. In actual application, the first preset time and preset number of times can be set according to the needs, and the embodiments of this application do not impose any restrictions on this. For example, as a feasible implementation method, the first preset time is 5 minutes and the preset number of times is 4. After 5 minutes of operation in the target stage of the washing program, in response to the first pressure action switch being triggered 4 times, the first pressure action switch and the second pressure action switch are triggered alternately according to the pressure value received by the pressure action switch.

[0086] In some embodiments, the washing mode can be divided into multiple levels, each with different washing intensity and set time for the corresponding washing program, allowing users to select the appropriate level. Based on this, the current intensity flowing through the magnetic pole changing electromagnet can be determined according to the user's selected level, to meet the washing intensity requirements of the washing program corresponding to different levels.

[0087] As a feasible implementation method, in the dishwasher provided in this application embodiment, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, before alternately triggering the first pressure action switch and the second pressure action switch, the controller is further configured to: determine the first current and / or the current intensity of the second current according to the gear selected by the user.

[0088] The intensity of the first current and / or the second current is determined based on the user-selected setting, so that the attractive and repulsive forces between the magnetic spray arm and the magnetic pole-changing electromagnet differ depending on the setting. This results in different rotational speeds of the spray arm as it is driven by the magnetic force when the dishwasher is operating at different settings.

[0089] For example, the washing mode can be divided into 5 levels, each with a different set time for the washing program; the higher the level, the shorter the set time. Simultaneously, the higher the current intensity of the magnetic pole changing electromagnet, the stronger the attraction and repulsion between the magnetic spray arm and the magnetic pole changing electromagnet, thus causing the spray arm to rotate at a higher speed.

[0090] In some embodiments, the dishwasher provided in this application controls the electromagnetically driven spray arm to rotate during the target stage of the washing program. However, when the dishwasher is running during the target stage, it is not only necessary to control the rotation of the spray arm, but also to control the operation of other components, such as the heater and the washing pump. If the spray arm is only controlled to stop rotating after the set time of the target stage has been reached, the washing pump has already stopped running, meaning there is no water flow in the spray arm to add weight, and the rotation speed of the spray arm will be very fast.

[0091] Based on this, as a feasible implementation method, please refer to Figure 8 The controller is also configured to execute S801-S802:

[0092] S801. During the target stage of the washing program, the running time of the target stage is calculated.

[0093] S802, in response to the time difference between the set time of the target stage and the running time being equal to the second preset time, determine that the current intensity of the first current and the second current is 0, or, stop triggering the pressure action switch.

[0094] It should be understood that setting the current intensity of the first and second currents to 0, or stopping the triggering of the pressure action switch, is to prevent the spray arm from rotating under magnetic force.

[0095] When the time difference between the set time of the target stage and the running time is equal to the second preset time, that is, when there is still the second preset time remaining in the set time of the target stage, the electromagnetic drive of the spray arm rotation is stopped, and the spray arm is rotated by water pressure, which can avoid the problem of the spray arm rotating too fast.

[0096] The following describes the working process of the dishwasher when the spray arm has water pressure driving power.

[0097] After the user selects a washing mode for the dishwasher, such as the intensive wash mode, an enhanced acceleration mode can be selected as an auxiliary mode. The enhanced acceleration mode has 5 levels, each reducing the program's runtime; the higher the level, the greater the reduction. The controller executes the corresponding washing program according to the user's selected washing mode. Please refer to [link / reference]. Figure 9 It includes the following stages:

[0098] S901, Pre-wash stage: Program starts → Drain pump operates 3 times to discharge residual water in the inner tank → Inlet valve operates to introduce water (pre-wash water) → Washing pump operates, and the spray arm performs pre-washing due to water pressure.

[0099] During the pre-washing stage, the heater does not operate and the water is not heated.

[0100] S902, Main Wash Stage: The washing pump stops → the drain pump operates once to discharge residual water from the inner tank → the water inlet valve operates to introduce water (main wash water) → the washing pump operates, and the spray arm performs the main wash due to water pressure → after 5 minutes, the dispenser operates to add dishwasher detergent → the heater operates → the first pressure switch is triggered by the water flow four times (the spray arm rotates 2 revolutions), → according to the selected gear, the computer board controls the corresponding electromagnet current intensity circuit to be connected → the magnetic pole change electromagnet is activated, and the magnetic pole change electromagnet is turned to the N pole (current positive), the magnetic spray arm receives like-pole magnetic repulsion acceleration on both sides, and moves away from the horizontal position → the second pressure switch operates, activating the magnetic pole change electromagnet When the magnetic spray arm is in the S pole (current reversed), it receives opposite magnetic attraction acceleration on both sides, moving away from the vertical position. The first pressure switch activates, turning the magnetic pole reversal electromagnet to the N pole (current forward). The magnetic spray arm receives same magnetic repulsion acceleration on both sides, moving away from the parallel position. The electromagnetic spray acceleration system operates stably (the steps of the second pressure switch activation and the first pressure switch activation are repeated). When there are 5 minutes left in the main wash stage, the computer board stops supplying power to the magnetic pole reversal electromagnet, the electromagnetic acceleration system stops running, and the spray arm performs the last 5 minutes of the main wash driven by water pressure. The heater stops operating, and the washing pump stops operating.

[0101] S903, Cold rinsing stage: The drain pump operates once to discharge the residual water in the inner tank → the water inlet valve operates to introduce water (cold rinsing water) → the washing pump operates, and the spray arm performs pre-washing due to water pressure.

[0102] During the cold drift stage, the heater does not operate and does not heat the water.

[0103] S904, Hot Bleaching Stage: The washing pump stops → the drain pump operates once to discharge residual water from the inner tank → the inlet valve operates to introduce water (hot bleaching water) → the washing pump operates, and the spray arms perform hot bleaching washing due to water pressure → after 5 minutes, the distributor operates to add brightener → the heater operates → the first pressure switch is triggered by the water flow and operates four times (the spray arms rotate 2 times) → according to the selected gear, the computer board controls the connection of the corresponding electromagnet current intensity circuit → the magnetic pole change electromagnet is activated, and the magnetic pole is changed to the N pole (current positive), the magnetic spray arms on both sides are repelled by the same magnetic force, and the acceleration gradually decreases as they move away from the horizontal position → the second pressure switch operates, activating the magnetic pole change When the electromagnet's pole is switched to S (current reversed), the magnetic spray arm experiences opposite magnetic attraction acceleration on both sides, moving away from the vertical position. Pressure switch A activates, turning the magnetic pole-changing electromagnet to N (current forward). The magnetic spray arm experiences like magnetic repulsion acceleration on both sides, moving away from the parallel position. The electromagnetic spray acceleration system operates stably (the steps of the second and first pressure switch activations are repeated). When 5 minutes remain in the heat-drying stage, power to the magnetic pole-changing electromagnet is stopped, the electromagnetic acceleration system stops operating, and the spray arm performs the final 5 minutes of the main wash driven by water pressure. The heater stops operating, and the washing pump stops operating.

[0104] S905, Drying stage.

[0105] Once the drying phase is complete, the program ends and the dishwasher stops running.

[0106] In other embodiments, the tilt angle of the nozzles at both ends of the non-magnetic spray arm is less than or equal to a preset angle. This means that when the nozzles at both ends of the non-magnetic spray arm spray water, the water pressure driving capability is weak or nonexistent, and the spray arm cannot be driven to rotate using water pressure. Therefore, during operation, electromagnetic drive is required to rotate the spray arm.

[0107] Please see Figure 10 For dishwashers where the tilt angle of the nozzles at both ends of the non-magnetic spray arm is less than or equal to a preset angle, the controller is configured to execute S1001-S1003 during the target stage of operation:

[0108] S1001. Determine the current intensity flowing through the pole-changing electromagnet based on the gear selected by the user.

[0109] Because the water pressure driving capability of the spray arm is weak or nonexistent, it cannot be driven to rotate by the water flow from the nozzles at both ends of the non-magnetic spray arm. Therefore, it needs to rely on electromagnetic drive to rotate the spray arm. Thus, during the main wash and hot rinse stages of the washing program, the current intensity flowing through the magnetic pole changing electromagnet is determined according to the user's selected setting.

[0110] As a feasible implementation method, the washing mode can be divided into 5 levels. Each level corresponds to a different set time for the washing program. The higher the level, the shorter the set time, and the higher the current intensity of the magnetic pole changing electromagnet.

[0111] S1002. If the pressure of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are triggered alternately.

[0112] After determining the current intensity flowing through the magnetic pole changing electromagnet, when the pressure value of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are alternately triggered, so that the magnetic pole changing electromagnet and the magnetic spray arm generate an attractive or repulsive force, so as to achieve the purpose of using electromagnetic drive to rotate the spray arm.

[0113] S1003. In response to the time difference between the set time of the target stage and the running time being equal to the second preset time, determine that the current intensity of the first current and the second current is 0, or stop triggering the pressure action switch.

[0114] When the time difference between the set time and the running time of the target stage equals the preset time (i.e., when there is still a preset time remaining between the set times for the main wash and hot rinse stages), the current intensity of the magnetic pole changing electromagnet is determined to be 0, or the triggering of the pressure action switch is stopped. This ensures that the spray arm is not driven by magnetic force but rotates using water pressure, thus preventing the spray arm from rotating too fast.

[0115] The following describes the working process of the dishwasher when the spray arm does not have water pressure driving capability (or has weak water pressure driving capability).

[0116] After the user selects a washing mode for the dishwasher, such as the intensive wash mode, an enhanced acceleration mode can be selected as an auxiliary mode. The enhanced acceleration mode has 5 levels, each reducing the program's runtime; the higher the level, the greater the reduction. The controller executes the corresponding washing program according to the user's selected washing mode; please refer to the above. Figure 9 It includes the following stages:

[0117] S901, Pre-wash stage: Program starts → Drain pump operates 3 times to discharge residual water in the inner tank → Inlet valve operates to introduce water (pre-wash water) → Washing pump operates, and the spray arm performs pre-washing due to water pressure.

[0118] During the pre-washing stage, the heater does not operate and the water is not heated.

[0119] S902, Main Wash Stage: Washing pump stops → Drain pump operates once to discharge residual water from the inner tank → Inlet valve operates to introduce water (main wash water) → Washing pump operates to perform the main wash (spray arms spray water without rotating) → According to the selected gear, the computer board controls the corresponding electromagnet current intensity circuit to be connected → Activating the magnetic pole change electromagnet, the magnetic pole is N (current positive), and the magnetic spray arms on both sides experience like-pole magnetic repulsion acceleration, moving away from the horizontal position (spray arms start rotating) → The second pressure action switch operates, activating the magnetic pole change electromagnet, the magnetic pole is S (current reverse), and the magnetic spray arms on both sides... The system gains attraction acceleration from opposite magnetic forces, moving away from the vertical position. The first pressure switch activates, turning the electromagnet to the N pole (positive current). The magnetic spray arm gains repulsion acceleration from the same magnetic forces on both sides, moving away from the parallel position. The electromagnetic acceleration spray system operates stably (the steps of the second and first pressure switch activations are repeated). After 5 minutes, the dispenser adds dishwashing powder. The heater activates. When there is 1 minute left in the main wash phase, the heater stops. The computer board stops supplying power to the electromagnet, and the electromagnetic acceleration system stops operating. The washing pump stops operating.

[0120] S903, Cold Rinse Stage: The drain pump operates once to discharge the residual water in the inner tank → the water inlet valve operates to introduce water (cold rinse water) → the washing pump operates, and the spray arms perform cold water rinsing due to water pressure.

[0121] During the cold drift stage, the heater does not operate and does not heat the water.

[0122] S904, Hot Drift Stage: The drain pump operates once to discharge residual water from the inner tank → the inlet valve operates to introduce water (hot drift water) → the washing pump operates to perform the main wash (spray arms spray water without rotating) → according to the selected gear, the computer board controls the corresponding electromagnet current intensity circuit to be connected → the magnetic pole reversal electromagnet is activated, the magnetic pole is turned to the N pole (current is positive), the magnetic spray arms on both sides receive like-pole magnetic repulsion acceleration, and move away from the horizontal position (spray arms start to rotate) → the second pressure action switch operates, activating the magnetic pole reversal electromagnet, the magnetic pole is turned to the S pole (current is reversed), the magnetic spray arms on both sides receive opposite-pole magnetic attraction acceleration. Leaving the vertical position → The first pressure switch activates, turning the electromagnet to the N pole (current in the positive direction). The magnetic spray arm experiences repulsive acceleration on both sides, gradually decreasing as it leaves the parallel position → The electromagnetic acceleration spray system operates stably (the steps of the second and first pressure switches are repeated) → After 5 minutes, the distributor dispenses brightener → The heater activates → When there is 1 minute remaining in the heat drift stage, the heater stops → The computer board stops supplying power to the electromagnet, and the electromagnetic acceleration system stops operating (the spray arm gradually stops rotating) → The washing pump stops operating.

[0123] S905, Drying stage.

[0124] Once the drying phase is complete, the program ends and the dishwasher stops running.

[0125] In some embodiments, the dishwasher may further include a display that shows the dishwasher's control panel. The dishwasher can use the display to provide feedback on its current operating status, such as running time and spray arm speed.

[0126] As one feasible implementation method, the dishwasher provided in this application embodiment is described in the following reference. Figure 11 The controller is also configured as follows:

[0127] S1101. Determine the rotational speed of the spray arm based on the number of times the first pressure action switch is triggered and the running time.

[0128] Since the non-magnetic spray arm has spray holes at both ends, the first pressure switch will be triggered twice for every one rotation of the spray arm. Therefore, the number of rotations of the spray arm can be determined by the number of times the first pressure switch is triggered. Then, combined with the running time, the rotational speed of the spray arm can be calculated.

[0129] S1102. Send the rotation speed of the spray arm to the display so that the display shows the rotation speed of the spray arm.

[0130] After calculating the rotation speed of the spray arm, the rotation speed can be sent to the display so that the display can show the rotation speed of the spray arm, allowing users to intuitively see the operating status of the dishwasher and improve the user experience.

[0131] This application embodiment also provides a dishwasher control method applicable to the dishwasher provided in the above embodiment. The control method includes: in response to receiving an instruction to execute a washing program, during a target stage of the washing program, if the pressure value of the water jet from the nozzle is greater than a preset pressure value, alternately triggering a first pressure action switch and a second pressure action switch; if the first pressure action switch is triggered, controlling a first current to flow through a magnetic pole changing electromagnet, so that a repulsive force is generated between the magnetic pole changing electromagnet and the magnetic spray arm; if the second pressure action switch is triggered, controlling a second current to flow through a magnetic pole changing electromagnet, so that an attractive force is generated between the magnetic pole changing electromagnet and the magnetic spray arm.

[0132] In some embodiments, the tilt angle of the spray nozzles on the non-magnetic spray arm is greater than a preset angle. As a feasible implementation, the control method further includes: controlling the non-magnetic spray arm to release water pressure during a target stage of the washing program to drive the spray arm to rotate.

[0133] Please see Figure 12 If the pressure of the water jet from the nozzle exceeds the preset pressure value, the first pressure action switch and the second pressure action switch are triggered alternately, including S1201-S1202:

[0134] S1201. After the first preset time, count the number of times the pressure value is greater than the preset pressure value.

[0135] S1202. In response to the number of times reaching the preset number, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are alternately triggered.

[0136] As a feasible implementation method, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, before alternately triggering the first pressure action switch and the second pressure action switch, the control method further includes: determining the first current and / or the current intensity of the second current according to the gear selected by the user.

[0137] As one feasible approach, please refer to Figure 13 The control methods also include:

[0138] S1301. During the target stage of the washing program, the running time of the target stage is calculated.

[0139] S1302, In response to the time difference between the set time and the running time of the target stage being equal to the preset time, determine that the current intensity of the first current and the second current is 0, or stop triggering the pressure action switch.

[0140] In other embodiments, the spray arm has weak or no water pressure driving capability, and cannot be driven to rotate by the water flow ejected from the nozzles at both ends of the non-magnetic spray arm. Please refer to Figure 14 When running in the target phase, the following steps are included:

[0141] S1401. Determine the current intensity flowing through the pole-changing electromagnet based on the gear selected by the user.

[0142] S1402. If the pressure of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are triggered alternately.

[0143] S1403, In response to the time difference between the set time of the target stage and the running time being equal to the second preset time, determine that the current intensity of the first current and the second current is 0, or, stop triggering the pressure action switch.

[0144] In some embodiments, the dishwasher also includes a display; the display shows the rotational speed of the spray arms; see [link to relevant documentation]. Figure 15 The control methods also include:

[0145] S1501. Determine the rotational speed of the spray arm based on the number of times the first pressure action switch is triggered and the running time.

[0146] S1502. Send the rotation speed of the spray arm to the display so that the display shows the rotation speed of the spray arm.

[0147] This application also provides an electronic device; please refer to [link / reference]. Figure 16 The electronic device 160 includes: one or more processors 1601; one or more memories 1602, wherein the one or more memories 1602 are used to store computer program code, the computer program code including computer instructions; when the one or more processors 1601 execute the computer instructions, the electronic device 160 performs the various steps of the method shown in the above method embodiments.

[0148] This application also provides a computer-readable storage medium storing computer instructions that, when executed on an electronic device, cause the electronic device to perform each step of the method flow shown in the above method embodiments.

[0149] This application also provides a computer program product, which includes computer instructions that, when executed on an electronic device, cause the electronic device to perform each step of the method flow shown in the above method embodiments.

[0150] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device including one or more servers, data centers, etc., that can be integrated with the medium. Available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0151] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dishwasher, characterized in that, The dishwasher includes: an inner tub, a spray arm rotatably disposed in the inner tub, a magnetic pole changing electromagnet, a pressure actuation switch, and a controller; the pressure actuation switch is connected to the magnetic pole changing electromagnet. The spray arm includes a magnetic spray arm and a non-magnetic spray arm that are fixedly connected. The magnetic spray arm is provided with a magnet, and the non-magnetic spray arm is provided with spray holes. The tilt angle of the spray holes on the non-magnetic spray arm is greater than a preset angle. The magnetic pole changing electromagnet and the pressure action switch are disposed inside the inner liner; The pressure-operated switch includes: a first pressure-operated switch and a second pressure-operated switch. The controller is configured to: In response to receiving an instruction to execute a washing program, during the target stage of the washing program, the non-magnetic spray arm is controlled to release water pressure to drive the spray arm to rotate. After a first preset time, count the number of times the water pressure value ejected from the nozzle is greater than the preset pressure value; In response to the number of times reaching a preset number, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are alternately triggered. If the first pressure action switch is triggered, the first current is controlled to flow through the magnetic pole changing electromagnet, so that a repulsive force is generated between the magnetic pole changing electromagnet and the magnetic spray arm. If the second pressure action switch is triggered, the second current is controlled to flow through the magnetic pole changing electromagnet, so that an attraction is generated between the magnetic pole changing electromagnet and the magnetic spray arm.

2. The dishwasher according to claim 1, characterized in that, Before alternately triggering the first pressure switch and the second pressure switch if the pressure of the water jet from the nozzle is greater than a preset pressure value, the controller is further configured to: The first current and / or the current intensity of the second current are determined based on the gear selected by the user.

3. The dishwasher according to claim 2, characterized in that, The controller is also configured to: During the target stage of the washing program, the running time of the target stage is calculated. In response to the time difference between the set time and the running time of the target stage being equal to a second preset time, the current intensities of the first current and the second current are adjusted to 0. Alternatively, in response to the time difference between the set time of the target stage and the running time being equal to a second preset time, the triggering of the pressure action switch is stopped.

4. The dishwasher according to claim 3, characterized in that, The dishwasher also includes a display; the display is used to show the rotational speed of the spray arms; The controller is also configured to: The rotational speed of the spray arm is determined based on the number of times the first pressure actuation switch is triggered and the running time. The rotational speed of the spray arm is sent to a display so that the display shows the rotational speed of the spray arm.

5. A method for controlling a dishwasher, characterized in that, The dishwasher includes: an inner tub, a spray arm rotatably disposed in the inner tub, a magnetic pole changing electromagnet, a pressure action switch, and a controller; The spray arm includes a magnetic spray arm and a non-magnetic spray arm that are fixedly connected. The magnetic spray arm is provided with a magnet, and the non-magnetic spray arm is provided with spray holes. The tilt angle of the spray holes on the non-magnetic spray arm is greater than a preset angle. The magnetic pole changing electromagnet and the pressure action switch are disposed inside the inner liner; The pressure-operated switch includes a first pressure-operated switch and a second pressure-operated switch. The control method includes: In response to receiving an instruction to execute a washing program, during the target stage of the washing program, the non-magnetic spray arm is controlled to release water pressure to drive the spray arm to rotate. After a first preset time, count the number of times the water pressure value ejected from the nozzle is greater than the preset pressure value; In response to the number of times reaching a preset number, if the pressure value of the water jet from the nozzle is greater than the preset pressure value, the first pressure action switch and the second pressure action switch are alternately triggered; if the first pressure action switch is triggered, the first current is controlled to flow through the magnetic pole changing electromagnet, so that a repulsive force is generated between the magnetic pole changing electromagnet and the magnetic spray arm. If the second pressure action switch is triggered, the second current is controlled to flow through the magnetic pole changing electromagnet, so that an attraction is generated between the magnetic pole changing electromagnet and the magnetic spray arm.

6. The control method according to claim 5, characterized in that, Before alternately triggering the first pressure switch and the second pressure switch if the pressure of the water jet from the nozzle is greater than a preset pressure value, the control method further includes: The first current and / or the current intensity of the second current are determined based on the gear selected by the user.

7. The control method according to claim 6, characterized in that, The control method further includes: During the target stage of the washing program, the running time of the target stage is calculated. In response to the time difference between the set time and the running time of the target stage being equal to a preset time, the current intensity of the first current and the second current is determined to be 0. Alternatively, in response to the time difference between the set time of the target stage and the running time being equal to a second preset time, the triggering of the pressure action switch is stopped.

8. The control method according to claim 7, characterized in that, The dishwasher also includes a display; the display is used to show the rotational speed of the spray arms; The control method further includes: The rotational speed of the spray arm is determined based on the number of times the first pressure actuation switch is triggered and the running time. The rotational speed of the spray arm is sent to a display so that the display shows the rotational speed of the spray arm.

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