Method and device for starting shield pump of dish washing machine

Abstract

The invention belongs to the field of dish-washing machines, and discloses a method and device for starting a shield pump of a dish-washing machine. The method comprises the steps that the shield pump is controlled to operate according to initial starting current and initial starting rotating speed; when the shield pump starts to operate, the shield pump is controlled to operate according to the set operation rotating speed, and the current rotating speed is detected; if the current rotating speed is within the set running rotating speed range, it is represented that the shield pump is started successfully, otherwise, the shield pump is restarted within the first preset duration according to the preset target current and the highest rotating speed, and whether the restarted current rotating speed is within the set running rotating speed range or not is detected; if the current rotating speed is within the set running rotating speed range, it is judged that restarting of the shield pump succeeds, otherwise, the shield pump is powered off within a second preset duration, and the step of restarting the shield pump according to the preset target current and the highest rotating speed within a first preset duration is executed till the current rotating speed is within the set running rotating speed range. By the adoption of the method, maintenance caused by locked rotor of the shield pump can be reduced on the premise that cost is not increased.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a method and a device for starting a shielded pump of a dishwasher. Background Art

[0002] At present, the main water pump of the dishwasher uses a shielded pump. During the operation of the dishwasher, the rotor of the shielded pump motor is immersed in water. When the dishwasher uses water containing impurities such as calcium ions, magnesium ions, oil or particulate matter to wash kitchen utensils, and leaves it for a period of time, the shaft and bearing of the rotor of the shielded pump will produce scale or foreign matter deposition due to the impurities in the water, causing the shaft and bearing of the rotor to get stuck. At the same time, after the dishwasher is inspected at the factory, the shaft and bearing of the rotor will also get stuck if it is transported or stored in an environment below zero degrees Celsius in winter. In the prior art, by detecting whether the rotor of the motor is rotating, it is determined whether the shielded pump is stuck, and then the customer is notified to report the problem. However, this detection method is relatively simple, resulting in a high maintenance rate for the dishwasher. Summary of the invention

[0003] Based on this, it is necessary to provide a method and device for starting a shielded pump of a dishwasher in order to solve the above technical problems.

[0004] In a first aspect, a method for starting a shielded pump of a dishwasher is provided, the method comprising:

[0005] After the canned motor pump is powered on, the canned motor pump is controlled to run according to the initial starting current and the initial starting speed;

[0006] When the canned pump starts to run, the canned pump is controlled to run according to the set running speed of the washing mode of the dishwasher, and the current speed of the canned pump is detected by the speed detection circuit;

[0007] If the current speed is within the set operating speed range, it indicates that the canned motor pump is started successfully; if the current speed is not within the set operating speed range, the canned motor pump is restarted according to the preset target current and maximum speed within a first preset time, and it is detected whether the current speed of the canned motor pump after restart is within the set operating speed range;

[0008] If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is restarted successfully; otherwise, the shielded pump is controlled to be powered off within a second preset time period, and after the power off is completed, the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time period is executed until the current speed of the shielded pump is within the set operating speed range; wherein the preset target current is greater than the initial starting current.

[0009] As an optional implementation, the method further includes:

[0010] When the number of executions of the step of restarting the shielded pump according to the preset target current and the maximum speed within the first preset time reaches a first preset number threshold, the shielded pump is controlled to start in forward rotation according to the preset target current and the maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully;

[0011] If the current speed of the canned motor pump after restart is not within the set operating speed range, the canned motor pump is controlled to be powered off within the second preset time period;

[0012] After the power failure is completed, the shielded pump is controlled to reverse and start according to the preset target current and the maximum speed within the first preset time period, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump has been started successfully. Otherwise, the step of controlling the shielded pump to rotate forward and start according to the preset target current and the maximum speed within the first preset time period is executed.

[0013] As an optional implementation, the method further includes:

[0014] When the number of executions of the step of controlling the forward rotation of the shielded pump to start the shielded pump according to the preset target current and the maximum speed within the first preset time reaches a second preset number threshold, the shielded pump is started according to the preset target current and the maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully;

[0015] If the current speed of the canned motor pump after restart is not within the set operating speed range, controlling the canned motor pump to be powered off within the second preset time period;

[0016] After the power failure is completed, the shielded pump is started according to the preset target current and the minimum speed of the shielded pump within the first preset time period, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is executed.

[0017] As an optional implementation, the method further includes:

[0018] When the number of executions of the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is greater than the third preset number threshold, a prompt message is issued, wherein the prompt message is used to prompt the user that the shielded pump is stuck and to report the shielded pump for repair, and the third preset number threshold is greater than the first preset number threshold.

[0019] As an optional implementation, the method further includes:

[0020] In response to the user's operation of starting the dishwasher, the dishwasher is powered on, and the solenoid valve of the dishwasher is controlled to open, so that water flows through the solenoid valve into the water inlet chamber of the dishwasher;

[0021] The water flow rate entering the water inlet chamber is acquired through the water flow detection module, and if the water flow rate is greater than or equal to a pre-stored water flow rate threshold, the canned motor pump is powered on.

[0022] In a second aspect, a device for starting a shielded pump of a dishwasher is provided, the device comprising:

[0023] A first operation module is used to control the operation of the canned motor pump according to an initial starting current and an initial starting speed after the canned motor pump is powered on;

[0024] A second operation module is used to control the operation of the canned pump according to the set operation speed of the cleaning mode of the dishwasher when the canned pump starts to operate, and detect the current speed of the canned pump through the speed detection circuit;

[0025] A first restart module, for indicating that the canned motor pump is successfully started if the current speed is within the set operating speed range, and restarting the canned motor pump according to a preset target current and a maximum speed within a first preset time period if the current speed is not within the set operating speed range, and detecting whether the current speed of the canned motor pump after restart is within the set operating speed range;

[0026] The first power-off module is used to determine that the shielded pump is successfully restarted if the current speed of the shielded pump after restart is within the set operating speed range; otherwise, the shielded pump is powered off within a second preset time period, and after the power-off is completed, the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time period is executed until the current speed of the shielded pump is within the set operating speed range; wherein the preset target current is greater than the initial starting current.

[0027] As an optional implementation, the device further includes:

[0028] A first control module is used for controlling the canned pump to start in forward rotation according to the preset target current and the maximum speed within the first preset time length when the number of executions of the step of restarting the canned pump according to the preset target current and the maximum speed within the first preset time length reaches a first preset number threshold, and detecting the current speed of the canned pump after restarting, and determining that the canned pump is successfully started if the current speed of the canned pump after restarting is within the set operating speed range;

[0029] A second power-off module, configured to control the canned motor pump to be powered off within the second preset time period if the current speed of the canned motor pump after restart is not within the set operating speed range;

[0030] The second control module is used to control the shielded pump to reverse and start according to the preset target current and the maximum speed within the first preset time after the power failure is completed, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of controlling the shielded pump to rotate forward and start according to the preset target current and the maximum speed within the first preset time is executed.

[0031] As an optional implementation, the device further includes:

[0032] A third control module is used for starting the shielded pump according to the preset target current and the maximum speed within the first preset time period when the number of executions of the starting step of controlling the shielded pump to rotate forward within the first preset time period according to the preset target current and the maximum speed reaches a second preset number threshold, and detecting the current speed of the shielded pump after restarting, and determining that the shielded pump is successfully started if the current speed of the shielded pump after restarting is within the set operating speed range;

[0033] A third power-off module, configured to control the canned pump to be powered off within the second preset time period if the current speed of the canned pump after restart is not within the set operating speed range;

[0034] The third starting module is used to start the shielded pump according to the preset target current and the minimum speed of the shielded pump within the first preset time after the power failure is completed, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time is executed.

[0035] As an optional implementation, the device further includes:

[0036] A prompt module is used to issue a prompt message when the number of executions of the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is greater than a third preset number threshold, wherein the prompt message is used to prompt the user that the shielded pump is stuck and to report the shielded pump for repair, and the third preset number threshold is greater than the first preset number threshold.

[0037] As an optional implementation, the device further includes:

[0038] A power-on module, used for responding to a user's power-on operation of the dishwasher, powering on the dishwasher, and controlling the solenoid valve of the dishwasher to open, so that water flows through the solenoid valve into the water inlet chamber of the dishwasher;

[0039] The acquisition module is used to acquire the water flow rate entering the water inlet chamber through the water flow detection module, and if the water flow rate is greater than or equal to a pre-stored water flow rate threshold, the canned pump is powered on.

[0040] In a third aspect, a dishwasher system is provided, the dishwasher system comprising: the method for starting a canned pump of a dishwasher as described in the first aspect and the device for starting a canned pump of a dishwasher as described in the second aspect.

[0041] In a fourth aspect, a computer device is provided, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and when the processor executes the computer program, the method steps described in the first aspect are implemented.

[0042] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the method steps described in the first aspect are implemented.

[0043] The present application provides a method for starting a shielded pump of a dishwasher. The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: after the shielded pump is powered on, the shielded pump is controlled to run according to the initial starting current and the initial starting speed; when the shielded pump starts to run, the shielded pump is controlled to run according to the set running speed of the washing mode of the dishwasher, and the current speed of the shielded pump is detected by a speed detection circuit; if the current speed is within the set running speed range, it indicates that the shielded pump is successfully started; if the current speed is not within the set running speed range, the shielded pump is restarted according to the preset target current and the maximum speed within a first preset time, and it is detected whether the current speed of the shielded pump after restarting is within the set running speed range; if the current speed of the shielded pump after restarting is within the set running speed range, it is determined that the shielded pump is restarted successfully, otherwise, the shielded pump is controlled to be powered off within a second preset time, and after the power off is completed, the step of restarting the shielded pump according to the preset target current and the maximum speed within the first preset time is performed until the current speed of the shielded pump is within the set running speed range; wherein the preset target current is greater than the initial starting current. In this way, based on the canned pump structure and usage scenario, the canned pump will be stuck due to scale, foreign matter, and ice, and the shaft and bearing of the canned pump will be stuck. By starting and stopping the canned pump, increasing the starting current and starting speed, the canned pump can be started, so that the shaft and bearing of the canned pump can operate normally, thereby reducing the maintenance rate. At the same time, this application is to modify the start control of the dishwasher main water pump (canned pump) in the control program, so as to reduce the maintenance of the canned pump caused by the jam without increasing the cost.

[0044] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A structural schematic diagram of a dishwasher system provided in an embodiment of the present application;

[0047] Figure 2 A flowchart of a method for starting a canned pump of a dishwasher provided in an embodiment of the present application;

[0048] Figure 3A schematic structural diagram of a device for starting a canned pump of a dishwasher provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] The method for starting a dishwasher shielded pump provided in the embodiment of the present application can be applied to a dishwasher system. Figure 1 As shown, the dishwasher system includes a central processor 101, a memory 102, a canned pump control module 103, a speed detection circuit 104, a canned pump 105, and a water flow detection module 106. The central processor 101 is respectively connected to the memory 102, the canned pump control module 103, the speed detection circuit 104, the canned pump 105, and the water flow detection module 106. The canned pump control module 103 and the speed detection circuit 104 are respectively connected to the canned pump 105.

[0052] The central processor 101 is used to receive the water flow sent by the water flow detection module 106. If the water flow is greater than or equal to the pre-stored water flow threshold, the central processor 101 controls the shielded pump control module 103 to power on the shielded pump 105 and controls the operation of the entire dishwasher.

[0053] The memory 102 is used to store the operation information of the entire dishwasher.

[0054] The canned pump control module 103 is used to control the operation of the canned pump 105 according to the initial starting current and the initial starting speed after the canned pump 105 is powered on. When the canned pump 105 starts to run, the canned pump 105 is controlled to run according to the set running speed of the washing mode of the dishwasher, and the current speed of the canned pump 105 is detected by the speed detection circuit 104. If the current speed is within the set running speed range, it indicates that the canned pump 105 is successfully started. If the current speed is not within the set running speed range, the canned pump 105 is restarted according to the preset target current and the maximum speed within the first preset time, and the current speed of the canned pump 105 after restart is detected to be within the set running speed range. If the current speed of the canned pump 105 after restart is within the set running speed range, it is determined that the canned pump 105 is restarted successfully. Otherwise, the canned pump 105 is controlled to be powered off within the second preset time, and after the power off is completed, the step of restarting the canned pump 105 according to the preset target current and the maximum speed within the first preset time is executed until the current speed of the canned pump 105 is within the set running speed range; wherein, the preset target current is greater than the initial starting current.

[0055] The rotation speed detection circuit 104 is used to detect the rotation speed of the canned pump 105 and send the detected rotation speed to the canned pump control module 103 .

[0056] The canned motor pump 105 is used to start and run under the control of the canned motor pump control module 103 .

[0057] The water flow detection module 106 is used to detect the water flow of water flowing into the water inlet chamber and send the water flow to the central processor 101.

[0058] The following will describe in detail a method for starting a canned pump for a dishwasher provided in an embodiment of the present application in combination with a specific implementation manner. Figure 2 A flowchart of a method for starting a canned pump of a dishwasher provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the specific steps are as follows:

[0059] Step 201, after the canned motor pump is powered on, the canned motor pump is controlled to run according to the initial starting current and the initial starting speed.

[0060] In practice, the main water pump of the dishwasher uses a shielded pump. During the operation of the dishwasher, the rotor of the shielded pump motor is immersed in water. When the dishwasher uses water containing impurities such as calcium ions, magnesium ions, oil or particulate matter to wash kitchenware, after being placed for a period of time, the shaft and bearing of the shielded pump rotor will produce scale or foreign matter deposition due to the impurities in the water, causing the shaft and bearing of the rotor to be stuck. At the same time, after the dishwasher is inspected at the factory, the shaft and bearing of the rotor will also be stuck when it is transported or stored in an environment below zero degrees Celsius in winter. In the prior art, by detecting whether the rotor of the motor rotates, when it is detected that the rotor does not rotate, it is determined that the shielded pump is stuck, and the customer is notified to report the repair. This method of detecting whether the rotor of the shielded pump motor is stuck is relatively simple, resulting in a high maintenance rate of the dishwasher. Therefore, a method for starting a shielded pump of a dishwasher is proposed, which is used to start the shielded pump to prevent the shaft and bearing of the rotor of the shielded pump motor from being stuck, thereby reducing the maintenance rate of the dishwasher. To determine whether the rotor of the shielded pump motor is stuck, it can be determined by whether the shielded pump is started normally. If the canned pump starts normally, the rotor is not stuck; if the canned pump does not start normally, the rotor is stuck. The normal start-up of the canned pump is to start the canned pump according to the initial starting current and initial starting speed of the canned pump, and control the operation of the canned pump. When the canned pump starts to run after it is turned on, the subsequent steps can determine whether the rotor of the motor of the canned pump is stuck based on the speed of the canned pump. Therefore, at the beginning, it is necessary to start the canned pump according to the initial starting current and initial starting speed after the canned pump is powered on, and control the operation of the canned pump.

[0061] Furthermore, before executing step 201, the dishwasher needs to be turned on first, and then the shielded pump needs to be powered on according to the cleaning mode selected by the user, and then the shielded pump can be controlled to run. The specific steps are as follows:

[0062] Step 1: In response to the user's operation of starting the dishwasher, the dishwasher is powered on, and the solenoid valve of the dishwasher is controlled to open, so that water flows through the solenoid valve into the water inlet chamber of the dishwasher.

[0063] In implementation, the user clicks the power-on button of the dishwasher, and in response to the user's power-on operation of the dishwasher, the dishwasher is powered on and powered on. After the dishwasher is powered on, the solenoid valve of the dishwasher is controlled to open. Water enters the water inlet chamber of the dishwasher through the solenoid valve. Therefore, in response to the user's power-on operation of the dishwasher, the dishwasher is powered on, and the solenoid valve of the dishwasher is controlled to open, and water flows through the solenoid valve into the water inlet chamber of the dishwasher.

[0064] Step 2: The water flow rate entering the water inlet chamber is obtained through the water flow detection module. If the water flow rate is greater than or equal to a pre-stored water flow rate threshold, the canned motor pump is powered on.

[0065] In practice, different cleaning modes of the dishwasher require different water flow rates. After the solenoid valve is opened, the water flow detection module detects the water flow rate entering the water inlet chamber. If the water flow rate is greater than the pre-stored water flow threshold, it means that the water flow rate requirement of the cleaning mode corresponding to the pre-stored water flow threshold is reached. At this point, the shielded pump can be powered on. Therefore, the water flow rate entering the water inlet chamber is obtained through the water flow detection module. If the water flow rate is greater than or equal to the pre-stored water flow threshold, the shielded pump is powered on.

[0066] Step 202: When the canned pump starts to run, the canned pump is controlled to run according to the set running speed of the washing mode of the dishwasher, and the current speed of the canned pump is detected by the speed detection circuit.

[0067] In implementation, if the canned pump starts normally, the rotor is not stuck, and if the canned pump does not start normally, the rotor is stuck. When the canned pump starts, the canned pump will be controlled to run according to the corresponding set operating speed in the cleaning mode of the dishwasher. In other words, when the canned pump starts running, the canned pump is controlled to run according to the set operating speed of the cleaning mode of the dishwasher. Therefore, after controlling the canned pump to run, it can be determined based on the current speed of the canned pump whether the canned pump starts normally, and then whether the rotor is stuck. Therefore, when the canned pump starts running, the canned pump is controlled to run according to the set operating speed of the cleaning mode of the dishwasher, and the current speed of the canned pump is detected by the speed detection circuit.

[0068] Step 203: If the current speed is within the set operating speed range, it indicates that the shielded pump is started successfully. If the current speed is not within the set operating speed range, the shielded pump is restarted according to the preset target current and maximum speed within the first preset time, and it is detected whether the current speed of the shielded pump after restart is within the set operating speed range.

[0069] In implementation, when the shielded pump starts running, the shielded pump will be controlled to run according to the corresponding set running speed in the washing mode of the dishwasher. That is to say, when the shielded pump is successfully started, the speed of the shielded pump should be the set running speed. However, the shielded pump is usually limited in power or current. When there are impurities and slag in the water in the dishwasher, the speed of the shielded pump will drop after reaching the power limit. Therefore, when the shielded pump operates normally in the washing mode, the current speed of the shielded pump should be within the set running speed range. Therefore, the speed detection circuit can detect the current speed of the shielded pump. If the current speed is within the set running speed range, it means that the shielded pump is successfully started, and the shielded pump is controlled to run according to the set running speed. If the current speed is not within the set running speed range, no water flows out of the spray arm of the dishwasher, indicating that the shielded pump has not been successfully started. The shielded pump can be started by increasing the starting current and speed, and the shielded pump is started according to the preset target current and the maximum speed within the first preset time. Among them, the preset target current is greater than the initial starting current, and the preset target current can be a preset multiple coefficient of the initial starting current. Then, it is judged whether the shielded pump is successfully started after increasing the starting current and starting speed. Therefore, it is necessary to detect the current speed of the shielded pump after increasing the starting current and the starting speed, and to determine whether the current speed of the shielded pump after restarting is within the set operating speed range. Therefore, if the current speed is within the set operating speed range, it indicates that the shielded pump is started successfully. If the current speed is not within the set operating speed range, the shielded pump is restarted according to the preset target current and the maximum speed within the first preset time, and it is detected whether the current speed of the shielded pump after restarting is within the set operating speed range.

[0070] Step 204, if the current speed of the canned pump after restart is within the set operating speed range, it is determined that the canned pump is restarted successfully, otherwise, the canned pump is controlled to be powered off within the second preset time period, and after the power off is completed, the step of restarting the canned pump according to the preset target current and the maximum speed within the first preset time period is executed until the current speed of the canned pump is within the set operating speed range; wherein, the preset target current is greater than the initial starting current.

[0071] In implementation, if the current speed of the canned pump after restarting is within the set operating speed range, it is determined that the canned pump has been successfully started, and the canned pump is controlled to run at the set operating speed. If the current speed of the canned pump after restarting is not within the set operating speed range, it means that the canned pump has not been successfully started. Then, the canned pump can be controlled to shut down and power off for a period of time, that is, the canned pump can be controlled to power off within the second preset time. Increasing the starting current and starting speed of the canned pump once and failing to start the canned pump can be repeated multiple times until it is detected that the current speed of the canned pump is within the set operating speed range. Therefore, after the canned pump is powered off within the second preset time, the step of restarting the canned pump according to the preset target current and maximum speed within the first preset time is repeated until the current speed of the canned pump after restarting is within the set operating speed range. Therefore, if the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump has been restarted successfully. Otherwise, the shielded pump is controlled to be powered off within the second preset time period, and after the power off is completed, the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time period is executed until the current speed of the shielded pump is within the set operating speed range; wherein, the preset target current is greater than the initial starting current.

[0072] Furthermore, if the above steps do not start successfully and the motor's rotor shaft and bearing are still in a stuck state, you can also start the canned motor pump by following the steps below:

[0073] Step three, when the number of executions of the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time reaches the first preset number threshold, the shielded pump is controlled to start in the forward direction according to the preset target current and maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump has been started successfully.

[0074] In implementation, after the operation of starting the shielded pump by increasing the starting current and the starting speed is performed for many times, the shielding device is not successfully started. Then, the shielded pump can also be started by increasing the starting current and the starting speed, and then controlling the forward and reverse rotation of the motor of the shielded pump. Therefore, when the number of executions of the shielded pump starting step according to the preset target current and the maximum speed within the first preset time reaches the first preset number threshold, the shielded pump is controlled to start forward according to the preset target current and the maximum speed within the first preset time. Then, the current speed of the shielded pump after restarting is detected, and it is determined whether the current speed after restarting is within the set operating speed range. If the current speed after restarting is within the set operating speed range, it means that the shielded pump is successfully started according to the preset target current and the maximum speed, then it is determined that the shielded pump is successfully started, and the shielded pump is controlled to run according to the set operating speed.

[0075] Step 4: If the current speed of the restarted shielded pump is not within the set operating speed range, the shielded pump is powered off within a second preset time period.

[0076] In implementation, if the current speed after restart is not within the set operating speed range, it means that the canned pump is not successfully started according to the preset target current and maximum speed. Then, the canned pump can be controlled to be shut down and powered off for a period of time, and the motor of the canned pump can be reversed in the subsequent steps to start the canned pump. Therefore, if the current speed of the canned pump after restart is not within the set operating speed range, the canned pump is controlled to be powered off within the second preset time.

[0077] Step five, after the power failure is completed, the shielded pump is controlled to reverse and start according to the preset target current and maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of controlling the shielded pump to rotate forward and start according to the preset target current and maximum speed within the first preset time is executed.

[0078] In implementation, after the power failure is completed, after the shielded pump is controlled to be powered off within the second preset duration, the shielded pump can be started by increasing the starting current and the speed, and controlling the reverse rotation of the motor of the shielded pump. Therefore, the shielded pump is controlled to reverse and start according to the preset target current and the maximum speed within the first preset duration. Then, the current speed of the shielded pump after restarting is detected, and it is determined whether the current speed after restarting is within the set operating speed range. If the current speed after restarting is within the set operating speed range, it means that the shielded pump is successfully started according to the preset target current and the maximum speed, then the shielded pump is judged to be successfully started, and the shielded pump is controlled to run according to the set operating speed. If the current speed after restarting is not within the set operating speed range, the process of starting the shielded pump by increasing the starting current and the starting speed, and controlling the forward and reverse rotation of the motor of the shielded pump can be repeated many times. Therefore, if the current speed after restarting is not within the set operating speed range, the step of controlling the shielded pump to start forward according to the preset target current and the maximum speed within the first preset duration can be repeated.

[0079] Furthermore, if the above steps do not start successfully and the motor's rotor shaft and bearing are still in a stuck state, you can also start the canned motor pump by following the steps below:

[0080] Step A: When the number of executions of the start step of controlling the shielded pump to rotate forward according to the preset target current and the maximum speed within the first preset time reaches the second preset number threshold, the shielded pump is started according to the preset target current and the maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully.

[0081] In implementation, after the operation of starting the shielded pump by increasing the starting current and the starting speed, and then controlling the forward and reverse rotation of the shielded pump motor is performed for many times, the shielding device is not successfully started. Then, the shielded pump can also be started by starting the current and controlling the shielded motor to run at the highest speed and the lowest speed. Therefore, when the execution number of the start-up step of controlling the shielded pump to rotate forward according to the preset target current and the highest speed within the first preset time reaches the second preset number threshold, the shielded pump is started according to the preset target current and the highest speed within the first preset time. Then, the current speed of the shielded pump after restarting is detected, and it is determined whether the current speed after restarting is within the set operating speed range. If the current speed after restarting is within the set operating speed range, it means that the shielded pump is successfully started according to the preset target current and the highest speed, and then it is determined that the shielded pump is successfully started.

[0082] Step B: If the current speed of the restarted shielded pump is not within the set operating speed range, the shielded pump is powered off within a second preset time period.

[0083] In implementation, if the current speed after restart is not within the set operating speed range, it means that the canned pump was not successfully started according to the preset target current and maximum speed. Then, the canned pump can be controlled to be shut down and powered off for a period of time, and then the motor of the canned pump can be controlled to rotate at the minimum speed in the subsequent steps to start the canned pump. Therefore, if the current speed of the canned pump after restart is not within the set operating speed range, the canned pump is controlled to be powered off within the second preset time.

[0084] Step C, after the power failure is completed, start the shielded pump according to the preset target current and the minimum speed of the shielded pump within the first preset time, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, execute the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time.

[0085] In implementation, after the power failure is completed, after the shielded pump is controlled to be powered off within the second preset duration, the starting current can be increased and the start of the shielded pump can be controlled according to the minimum speed. Therefore, the shielded pump is started according to the preset target current and the minimum speed of the shielded pump within the first preset duration. Then, the current speed of the shielded pump after restarting is detected, and it is determined whether the current speed after restarting is within the set operating speed range. If the current speed after restarting is within the set operating speed range, it means that the shielded pump is successfully started in reverse according to the preset target current and the minimum speed, then the shielded pump is determined to be successfully started, and the shielded pump is controlled to run according to the set operating speed. If the current speed after restarting is not within the set operating speed range, the process of increasing the starting current and controlling the start of the shielded pump according to the maximum speed and the minimum speed can be repeated many times. Therefore, if the current speed after restarting is not within the set operating speed range, the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset duration can be repeated.

[0086] Furthermore, when the number of executions of the step of starting the shielded pump according to the preset target current and maximum speed within the first preset time period is greater than the third preset number threshold, a prompt message is issued. The prompt message is used to prompt the user that the shielded pump is stuck and to report the shielded pump for repair. The third preset number threshold is greater than the first preset number threshold.

[0087] In implementation, when the number of executions of the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time is greater than the third preset number threshold, it means that multiple attempts to start the shielded pump have failed, and the shaft and bearing of the shielded pump are stuck and cannot be started. Then a prompt message can be issued at this time to remind the user that the shielded pump is stuck and needs to be repaired, wherein the third preset number threshold is greater than the first preset number threshold.

[0088] The embodiment of the present application provides a method for starting a shielded pump of a dishwasher. Based on the shielded pump structure and usage scenario, the shielded pump may get stuck on the shaft and bearing of the shielded pump due to scale, foreign matter, and ice. The shielded pump is started by starting and stopping the shielded pump, reversing the shielded pump, increasing the starting current, and changing the speed suddenly, so that the shaft and bearing of the shielded pump can operate normally, thereby reducing the maintenance rate. At the same time, the present application is to modify the start-up control of the main water pump (shielded pump) of the dishwasher in the control program, so as to reduce the maintenance of the shielded pump caused by the stalling without increasing the cost.

[0089] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0090] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. For related points, please refer to the description of other method embodiments.

[0091] The present application also provides a device for starting a shielded pump of a dishwasher, such as Figure 3 As shown, the device comprises:

[0092] The first operation module 301 is used to control the operation of the canned motor pump according to the initial starting current and the initial starting speed after the canned motor pump is powered on;

[0093] The second operation module 302 is used to control the operation of the canned pump according to the set operation speed of the washing mode of the dishwasher when the canned pump starts to operate, and detect the current speed of the canned pump through the speed detection circuit;

[0094] A first restart module 303 is used to indicate that the canned motor pump is successfully started if the current speed is within the set operating speed range, and restart the canned motor pump according to the preset target current and maximum speed within a first preset time period if the current speed is not within the set operating speed range, and detect whether the current speed of the canned motor pump after restart is within the set operating speed range;

[0095] The first power-off module 304 is used to determine that the shielded pump is successfully restarted if the current speed of the shielded pump after restart is within the set operating speed range, otherwise, control the shielded pump to be powered off within a second preset time period, and after the power-off is completed, execute the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time period until the current speed of the shielded pump is within the set operating speed range; wherein the preset target current is greater than the initial starting current.

[0096] As an optional implementation, the device further includes:

[0097] A first control module is used for controlling the canned pump to start in forward rotation according to the preset target current and the maximum speed within the first preset time length when the number of executions of the step of restarting the canned pump according to the preset target current and the maximum speed within the first preset time length reaches a first preset number threshold, and detecting the current speed of the canned pump after restarting, and determining that the canned pump is successfully started if the current speed of the canned pump after restarting is within the set operating speed range;

[0098] A second power-off module, configured to control the canned motor pump to be powered off within the second preset time period if the current speed of the canned motor pump after restart is not within the set operating speed range;

[0099] The second control module is used to control the shielded pump to reverse and start according to the preset target current and the maximum speed within the first preset time after the power failure is completed, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of controlling the shielded pump to rotate forward and start according to the preset target current and the maximum speed within the first preset time is executed.

[0100] As an optional implementation, the device further includes:

[0101] A third control module is used for starting the shielded pump according to the preset target current and the maximum speed within the first preset time period when the number of executions of the starting step of controlling the shielded pump to rotate forward within the first preset time period according to the preset target current and the maximum speed reaches a second preset number threshold, and detecting the current speed of the shielded pump after restarting, and determining that the shielded pump is successfully started if the current speed of the shielded pump after restarting is within the set operating speed range;

[0102] A third power-off module, configured to control the canned pump to be powered off within the second preset time period if the current speed of the canned pump after restart is not within the set operating speed range;

[0103] The third starting module is used to start the shielded pump according to the preset target current and the minimum speed of the shielded pump within the first preset time after the power failure is completed, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time is executed.

[0104] As an optional implementation, the device further includes:

[0105] A prompt module is used to issue a prompt message when the number of executions of the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is greater than a third preset number threshold, wherein the prompt message is used to prompt the user that the shielded pump is stuck and to report the shielded pump for repair, and the third preset number threshold is greater than the first preset number threshold.

[0106] As an optional implementation, the device further includes:

[0107] A power-on module, used for responding to a user's power-on operation of the dishwasher, powering on the dishwasher, and controlling the solenoid valve of the dishwasher to open, so that water flows through the solenoid valve into the water inlet chamber of the dishwasher;

[0108] The acquisition module is used to acquire the water flow rate entering the water inlet chamber through the water flow detection module, and if the water flow rate is greater than or equal to a pre-stored water flow rate threshold, the canned pump is powered on.

[0109] The embodiment of the present application provides a device for starting a shielded pump of a dishwasher. Based on the shielded pump structure and usage scenario, the shielded pump may get stuck on the shaft and bearing of the shielded pump due to scale, foreign matter, and ice. The shielded pump is started by starting and stopping the shielded pump, reversing the shielded pump, increasing the starting current, and changing the speed suddenly, so that the shaft and bearing of the shielded pump can operate normally, thereby reducing the maintenance rate. At the same time, the present application is to modify the start-up control of the main water pump (shielded pump) of the dishwasher in the control program, so as to reduce the maintenance of the shielded pump caused by the stalling without increasing the cost.

[0110] The specific definition of the device for starting the canned pump of the dishwasher can be found in the definition of the method for starting the canned pump of the dishwasher above, which will not be repeated here. Each module in the device for starting the canned pump of the dishwasher can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0111] In one embodiment, a computer device is provided, such as Figure 4 As shown, it includes a memory and a processor, the memory stores a computer program that can be run on the processor, and the processor implements the method steps for starting the shielded pump of the dishwasher when executing the computer program.

[0112] In one embodiment, a computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for starting the canned pump of a dishwasher are implemented.

[0113] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0114] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0115] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0116] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0117] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for starting a canned pump of a dishwasher, characterized in that: The method comprises: After the canned motor pump is powered on, the canned motor pump is controlled to run according to the initial starting current and the initial starting speed; When the canned pump starts to run, the canned pump is controlled to run according to the set running speed of the washing mode of the dishwasher, and the current speed of the canned pump is detected by the speed detection circuit; If the current speed is within the set operating speed range, it indicates that the canned motor pump is started successfully; if the current speed is not within the set operating speed range, the canned motor pump is restarted according to the preset target current and maximum speed within a first preset time, and it is detected whether the current speed of the canned motor pump after restart is within the set operating speed range; If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is restarted successfully; otherwise, the shielded pump is controlled to be powered off within a second preset time period, and after the power off is completed, the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time period is executed until the current speed of the shielded pump is within the set operating speed range; wherein the preset target current is greater than the initial starting current.

2. The method according to claim 1, characterized in that The method further comprises: When the number of executions of the step of restarting the shielded pump according to the preset target current and the maximum speed within the first preset time reaches a first preset number threshold, the shielded pump is controlled to start in forward rotation according to the preset target current and the maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully; If the current speed of the canned motor pump after restart is not within the set operating speed range, the canned motor pump is controlled to be powered off within the second preset time period; After the power failure is completed, the shielded pump is controlled to reverse and start according to the preset target current and the maximum speed within the first preset time period, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump has been started successfully. Otherwise, the step of controlling the shielded pump to rotate forward and start according to the preset target current and the maximum speed within the first preset time period is executed.

3. The method according to claim 2, characterized in that The method further comprises: When the number of executions of the step of controlling the forward rotation of the shielded pump to start the shielded pump according to the preset target current and the maximum speed within the first preset time reaches a second preset number threshold, the shielded pump is started according to the preset target current and the maximum speed within the first preset time, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully; If the current speed of the canned motor pump after restart is not within the set operating speed range, controlling the canned motor pump to be powered off within the second preset time period; After the power failure is completed, the shielded pump is started according to the preset target current and the minimum speed of the shielded pump within the first preset time period, and the current speed of the shielded pump after restart is detected. If the current speed of the shielded pump after restart is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is executed.

4. The method according to claim 3, characterized in that The method further comprises: When the number of executions of the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is greater than the third preset number threshold, a prompt message is issued, wherein the prompt message is used to prompt the user that the shielded pump is stuck and to report the shielded pump for repair, and the third preset number threshold is greater than the first preset number threshold.

5. The method according to claim 1, characterized in that The method further comprises: In response to the user's operation of starting the dishwasher, the dishwasher is powered on, and the solenoid valve of the dishwasher is controlled to open, so that water flows through the solenoid valve into the water inlet chamber of the dishwasher; The water flow rate entering the water inlet chamber is acquired through the water flow detection module, and if the water flow rate is greater than or equal to a pre-stored water flow rate threshold, the canned motor pump is powered on.

6. A device for starting a shielded pump of a dishwasher, characterized in that: The device comprises: A first operation module is used to control the operation of the canned motor pump according to an initial starting current and an initial starting speed after the canned motor pump is powered on; A second operation module is used to control the operation of the canned pump according to the set operation speed of the cleaning mode of the dishwasher when the canned pump starts to operate, and detect the current speed of the canned pump through the speed detection circuit; A first restart module, for indicating that the canned motor pump is successfully started if the current speed is within the set operating speed range, and restarting the canned motor pump according to a preset target current and a maximum speed within a first preset time period if the current speed is not within the set operating speed range, and detecting whether the current speed of the canned motor pump after restart is within the set operating speed range; The first power-off module is used to determine that the shielded pump is successfully restarted if the current speed of the shielded pump after restart is within the set operating speed range; otherwise, the shielded pump is powered off within a second preset time period, and after the power-off is completed, the step of restarting the shielded pump according to the preset target current and maximum speed within the first preset time period is executed until the current speed of the shielded pump is within the set operating speed range; wherein the preset target current is greater than the initial starting current.

7. The device according to claim 6, characterized in that The device also includes: A first control module is used for controlling the canned pump to start in forward rotation according to the preset target current and the maximum speed within the first preset time length when the number of executions of the step of restarting the canned pump according to the preset target current and the maximum speed within the first preset time length reaches a first preset number threshold, and detecting the current speed of the canned pump after restarting, and determining that the canned pump is successfully started if the current speed of the canned pump after restarting is within the set operating speed range; A second power-off module, configured to control the canned motor pump to be powered off within the second preset time period if the current speed of the canned motor pump after restart is not within the set operating speed range; The second control module is used to control the shielded pump to reverse and start according to the preset target current and the maximum speed within the first preset time after the power failure is completed, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of controlling the shielded pump to rotate forward and start according to the preset target current and the maximum speed within the first preset time is executed.

8. The device according to claim 7, characterized in that The device also includes: A third control module is used for starting the shielded pump according to the preset target current and the maximum speed within the first preset time period when the number of executions of the starting step of controlling the shielded pump to rotate forward within the first preset time period according to the preset target current and the maximum speed reaches a second preset number threshold, and detecting the current speed of the shielded pump after restarting, and determining that the shielded pump is successfully started if the current speed of the shielded pump after restarting is within the set operating speed range; A third power-off module, configured to control the canned pump to be powered off within the second preset time period if the current speed of the canned pump after restart is not within the set operating speed range; The third starting module is used to start the shielded pump according to the preset target current and the minimum speed of the shielded pump within the first preset time after the power failure is completed, and detect the current speed of the shielded pump after restarting. If the current speed of the shielded pump after restarting is within the set operating speed range, it is determined that the shielded pump is started successfully. Otherwise, the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time is executed.

9. The device according to claim 8, characterized in that The device also includes: A prompt module is used to issue a prompt message when the number of executions of the step of starting the shielded pump according to the preset target current and the maximum speed within the first preset time period is greater than a third preset number threshold, wherein the prompt message is used to prompt the user that the shielded pump is stuck and to report the shielded pump for repair, and the third preset number threshold is greater than the first preset number threshold.

10. The device according to claim 6, characterized in that The device also includes: A power-on module, used for responding to a user's power-on operation of the dishwasher, powering on the dishwasher, and controlling the solenoid valve of the dishwasher to open, so that water flows through the solenoid valve into the water inlet chamber of the dishwasher; The acquisition module is used to acquire the water flow rate entering the water inlet chamber through the water flow detection module, and if the water flow rate is greater than or equal to a pre-stored water flow rate threshold, the canned pump is powered on.

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