Operation control method of dish washing machine and dish washing machine

Abstract

The invention relates to an operation control method of a dish-washing machine and the dish-washing machine. The dish-washing machine comprises a cleaning tank, a spraying arm arranged in the cleaning tank, a water pump communicated with the spraying arm and a driving motor for driving blades in the water pump to rotate. Whether the washing water amount in the washing tank is insufficient or not is judged by judging whether the real-time operation power of the driving motor or the pressure value recorded by the water level pressure sensor at the bottom of the washing tank is abnormal or not, and if the washing water amount is insufficient, the water inlet valve is opened to supplement water. Compared with the prior art, the method has the advantages that whether the washing water amount is insufficient or not can be judged in real time at any washing stage of the dish washing machine, water supplementing can be conveniently conducted when needed, the control mode is simple, and cost is low.

Description

Technical Field

[0001] The invention relates to an operation control method of a dishwasher and the dishwasher. Background Art

[0002] When executing the cleaning program, the existing dishwasher needs to carry out multiple cleaning stages such as the first wash, the second wash, and the third wash. Each cleaning stage requires water intake, and the amount of water intake needs to be measured. The amount of washing water in each cleaning stage is mainly controlled by the flow sensor of the dishwasher pipeline or the water inlet valve. The actual water intake of the dishwasher is controlled from the water inlet end by the flow sensor to be the same as the preset value each time. This only ensures that the dishwasher is as consistent as possible with the preset water intake, but there will inevitably be deviations, and there will be a situation where the water volume is too little. There is also a situation that during the actual cleaning process, the preset water volume may be insufficient under certain specific circumstances, so the detection method of the flow sensor cannot be judged. Therefore, the existing technology needs to be further improved. Summary of the invention

[0003] The primary technical problem to be solved by the present invention is to provide a dishwasher operation control method for the above-mentioned prior art, which can detect in real time whether the amount of washing water is sufficient during a certain cleaning program and replenish water when the amount of washing water is insufficient.

[0004] A further technical problem to be solved by the present invention is to provide a dishwasher in view of the above-mentioned prior art, which can detect in real time whether the amount of washing water is sufficient during the execution of a certain cleaning program and replenish water when the amount of washing water is insufficient.

[0005] The technical solution adopted by the present invention to solve the above-mentioned primary technical problem is: an operation control method of a dishwasher, wherein the dishwasher comprises a cleaning tank, a spray arm arranged in the cleaning tank, a water pump connected to the spray arm, and a driving motor for driving the blades in the water pump to rotate, characterized in that: during the process of the dishwasher executing a certain cleaning program, it is judged whether the amount of washing water in the cleaning tank is insufficient by any of the following two methods, and if the amount of washing water is insufficient, the water inlet valve is opened to replenish water:

[0006] Method 1: Determine whether the real-time operating power of the drive motor is abnormal to analyze and determine whether the amount of washing water in the washing tank is insufficient;

[0007] Method 2: Install a water level pressure sensor at the bottom of the cleaning tank, and analyze and determine whether the amount of washing water in the cleaning tank is insufficient by checking whether the pressure value recorded by the water level pressure sensor is abnormal.

[0008] In the method 1, the water shortage coefficient μ is set, and the dishwasher drives the motor at a preset constant power P at the initial operation time of the washing program. nRun, and then during the process of detecting the real-time operating power of the drive motor, taking a fixed time interval as a cycle, record the minimum value P1 of the real-time operating power of the drive motor within this cycle, and calculate the water shortage coefficient μ through the following formula:

[0009]

[0010] If the water shortage coefficient μ is less than or equal to 80%, it is considered that the operating power of the drive motor is abnormal during this cleaning cycle, and it is judged that the washing water volume in the cleaning tank is insufficient; otherwise, it is considered that the washing water volume in the cleaning tank is normal.

[0011] In the above-mentioned method 2, when the dishwasher executes a certain cleaning stage, the pressure value of the water level pressure sensor corresponding to the set water intake is taken as the reference pressure value Pn. During the process that the dishwasher completes the set water intake and executes a certain section of the cleaning program, taking a fixed time interval as a cycle, the pressure value of the water level pressure sensor is detected in real time, and the average value P1 of the pressure values detected by the water level pressure sensor within this interval cycle is calculated. If P1 < Pn, it is judged that the washing water volume in the cleaning tank is insufficient; otherwise, it is considered that the washing water volume in the cleaning tank is normal.

[0012] When it is judged that the washing water volume is insufficient, make up water by opening the water inlet valve, and the single water make-up volume Q1 is calculated through the following method:

[0013]

[0014] Where Q n is the washing water intake volume when initially executing a certain section of the cleaning program.

[0015] During the process that the dishwasher executes a certain section of the cleaning program, if the number of water make-up times exceeds two, it is determined that the cleaning is abnormal.

[0016] The fixed time interval is 8 to 12 seconds.

[0017] The technical solution adopted by the present invention to solve the above further technical problems is: a dishwasher, including a cleaning tank, a spray arm arranged in the cleaning tank, a water pump communicated with the spray arm, and a drive motor for driving the blades in the water pump to rotate, characterized in that during the process that the dishwasher executes a certain section of the cleaning program, the above-mentioned operation control method is implemented.

[0018] Compared with the prior art, the advantage of the present invention is that when the dishwasher is executing a certain cleaning program, it is possible to determine whether the amount of washing water in the cleaning tank is insufficient by checking whether the real-time operating power of the driving motor or the pressure value recorded by the water level pressure sensor at the bottom of the cleaning tank is abnormal. If the amount of washing water is insufficient, the water inlet valve is opened to replenish water. Therefore, in any cleaning stage, it is possible to determine in real time whether the amount of washing water is insufficient, so that water can be replenished when needed. The control method is simple and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a dishwasher in Embodiment 1 of the present invention.

[0020] Figure 2 This is a flow chart of the operation control method of the dishwasher in the first embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a dishwasher in Embodiment 2 of the present invention.

[0022] Figure 4 This is a flow chart of the operation control method of the dishwasher in the second embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] Embodiment 1

[0025] like Figure 1 The dishwasher shown includes a cleaning tank 1, a spray arm 2 arranged in the cleaning tank, a water pump 3 connected to the spray arm, and a driving motor 4 for driving the blades in the water pump 3 to rotate. The driving motor 4 is communicatively connected to a control circuit board, and the control circuit board can collect the real-time operating power of the driving motor.

[0026] The following describes the operation control method of the above dishwasher. Figure 2 As shown:

[0027] When the dishwasher is executing a certain cleaning program, the water shortage coefficient μ is set. At the initial operation moment of the dishwasher executing the cleaning program, the drive motor is driven at a preset constant power P n Run, and then detect the real-time operating power of the drive motor in real time. In the process of detecting the real-time operating power of the drive motor, a fixed time interval is a cycle. Here, the fixed time interval is 8 to 12 seconds, preferably 10 seconds. Record the minimum value P1 of the real-time operating power of the drive motor in the cycle, and calculate the water shortage coefficient μ by the following formula:

[0028]

[0029] If the water shortage coefficient μ is less than or equal to 80%, it is considered that the operating power of the drive motor is abnormal during this cleaning cycle, and it is judged that the washing water volume in the cleaning tank is insufficient; otherwise, it is considered that the washing water volume in the cleaning tank is normal.

[0030] When it is judged that the washing water volume is insufficient, make up water by opening the water inlet valve, and the single water make-up volume Q1 is calculated in the following way:

[0031]

[0032] where Q n is the set water inlet volume when initially executing a certain cleaning program segment.

[0033] When a fixed time interval period expires, repeat the detection and judgment in a loop. During the execution of a certain cleaning program segment by the above dishwasher, if the number of water make-up times exceeds two, it is determined that the cleaning is abnormal.

[0034] Embodiment 2

[0035] Different from Embodiment 1, a water level pressure sensor 5 is installed at the bottom of the dishwasher cleaning tank 1. The preferred installation position of the water level pressure sensor 5 is the bottom plane at the bottom of the dishwasher for installing the water pump, as shown in Figure 3 shown. Its operation control method is: analyze and judge whether the washing water volume in the cleaning tank is insufficient by whether the pressure value recorded by the water level pressure sensor is abnormal.

[0036] For the specific operation control method, see Figure 4 shown. When the dishwasher executes a certain cleaning stage, let the pressure value of the water level pressure sensor corresponding to the set water inlet volume be the reference pressure value Fn. During the process that the dishwasher completes the set water inlet volume and executes a certain cleaning program segment, take a fixed time interval as a cycle. Here, the fixed time interval is 4 - 6 seconds, preferably 5 seconds, and the pressure value of the water level pressure sensor is detected in real time, and the average value F1 of the pressure values detected by the water level pressure sensor within this interval period is calculated. If F1 < Fn, it is judged that the washing water volume in the cleaning tank is insufficient; otherwise, it is considered that the washing water volume in the cleaning tank is normal.

[0037] When it is judged that the washing water volume is insufficient, make up water by opening the water inlet valve, and the single water make-up volume Q1 is calculated in the following way:

[0038]

[0039] where Q n is the set water inlet volume when initially executing a certain cleaning program segment.

[0040] When a fixed time interval period expires, the detection and judgment are repeated in a cycle. If the dishwasher is performing a certain cleaning program and the water replenishment times exceed two times, it is determined that the cleaning is abnormal.

Claims

1. A method for controlling the operation of a dishwasher, wherein the dishwasher comprises a cleaning tank, a spray arm disposed in the cleaning tank, a water pump connected to the spray arm, and a drive motor for driving blades in the water pump to rotate, characterized in that: During a certain cleaning program execution of the dishwasher, the washing water volume in the washing tank is judged to be insufficient by any one of the following two methods. If the washing water volume is insufficient, the water inlet valve is opened for water replenishment: Method 1: Judge whether the real-time operating power of the drive motor is abnormal to analyze and judge whether the washing water volume in the washing tank is insufficient; Method 2: Install a water level pressure sensor at the bottom of the washing tank, and analyze and judge whether the washing water volume in the washing tank is insufficient by whether the pressure value recorded by the water level pressure sensor is abnormal.

2. The operation control method of the dishwasher according to claim 1, characterized in that: In the method 1, the water shortage coefficient μ is set, and the dishwasher drives the motor at a preset constant power P at the initial operation time of executing a certain cleaning program. n Run, and then in the process of detecting the real-time operating power of the drive motor, a fixed time interval is taken as a cycle, and the minimum value P1 of the real-time operating power of the drive motor in the cycle is recorded, and the water shortage coefficient μ is calculated by the following formula: If the water shortage coefficient μ is less than or equal to 80%, it is considered that the operating power of the drive motor is abnormal during the current cleaning cycle, and it is judged that the washing water volume in the washing tank is insufficient; otherwise, it is considered that the washing water volume in the washing tank is normal.

3. The operation control method of the dishwasher according to claim 1, characterized in that: In Method 2, when the dishwasher executes a certain cleaning stage, the pressure value of the water level pressure sensor corresponding to the set water inlet volume is set as the reference pressure value Fn. During the process that the dishwasher completes the set water inlet volume and executes a certain cleaning program, with a fixed time interval as a cycle, the pressure value of the water level pressure sensor is detected in real time, and the average value F1 of the pressure values detected by the water level pressure sensor within this interval cycle is calculated. If F1 < Fn, it is judged that the washing water volume in the washing tank is insufficient; otherwise, it is considered that the washing water volume in the washing tank is normal.

4. The operation control method of the dishwasher according to claim 2 or 3, characterized in that: When it is judged that the washing water volume is insufficient, water replenishment is carried out by opening the water inlet valve, and the single water replenishment volume Q1 is calculated by the following method: Where Q n It is the set water intake volume when a cleaning program is initially executed.

5. The operation control method of the dishwasher according to claim 3, characterized in that: During the execution of a certain cleaning program of the dishwasher, if the water replenishment times exceed two, it is determined that the cleaning is abnormal.

6. The operation control method of the dishwasher according to claim 2 or 3, characterized in that: The fixed time interval is 8 - 12 seconds.

7. A dishwasher, comprising a cleaning tank, a spray arm disposed in the cleaning tank, a water pump connected to the spray arm, and a drive motor for driving blades in the water pump to rotate, characterized in that: During the execution of a certain cleaning program of the dishwasher, the operation control method described in any one of claims 1 - 3 is implemented.

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