Control method for preventing dishwasher from being stuck by foreign matters

Abstract

The invention discloses a control method for preventing a dishwasher from being stuck by foreign matters. The control method comprises the following steps: S1, acquiring rotating speed data of a motor of a pulverizer and processing the rotating speed data; s2, determining whether an anti-jamming program is started or not; s3, executing an anti-jamming program; and S4, judging an anti-jamming state, and outputting a normal working state or an anti-jamming failure alarm. The foreign matter jamming degree is accurately judged by collecting the rotating speed data of the motor in real time, calculating S average 1 and S average 2 in combination with two-stage average values and filtering abnormal values. The anti-sticking mode is automatically matched according to the rotating speed interval, and stuck residues are effectively loosened through alternate operation of forward rotation and reverse rotation.

Description

Technical Field

[0001] The invention belongs to the field of household kitchen appliances, and in particular relates to a method for controlling foreign matter anti-stuck and internal circulation of a dishwasher. Background Art

[0002] Since domestic eating habits are different from those abroad, if the food residues stuck on the dishes are not cleaned up when they are put into the dishwasher, such as some vegetable leaves, small bones, etc., the traditional drain pump does not have the function of handling foreign matter. When these debris enters the drain pump, the drain pump impeller may get stuck, causing the dishwasher to malfunction and fail to achieve the cleaning effect.

[0003] Although the instructions require that food residues must be cleaned up before putting them in, everyone's subjective understanding is different, and some users may not be able to meet the cleaning requirements during actual use.

[0004] During the internal circulation process of crushing, if the residue particles are too large, such as large broken bones, the crusher may be stuck, resulting in the loss of internal circulation function, or even worse, the subsequent drainage cannot be achieved.

[0005] In view of the above problems, the present invention proposes a control method for preventing foreign matter from getting stuck in a dishwasher. The control difficulty of this method lies in: when the grinder detects that a foreign matter is stuck, how to detect it and how to remove the stuck foreign matter. Summary of the invention

[0006] The purpose of the present invention is to provide a control method for preventing foreign matter from getting stuck in a dishwasher, which can accurately detect whether a grinder is stuck with foreign matter and effectively solve the problem of foreign matter getting stuck through cycles of different levels.

[0007] A method for controlling foreign matter jamming of a dishwasher comprises the following steps:

[0008] S1: Collect the speed data of the grinder motor and process the speed data;

[0009] S2: Determine whether to enable the anti-card program;

[0010] S3: Execute anti-card procedure;

[0011] S4: Determine the anti-stuck status and output the normal working status or anti-stuck failure alarm.

[0012] Whether to enable the anti-jamming program is determined based on the rotation speed data of the grinder motor, and its status is determined after the anti-jamming program is executed.

[0013] Preferably, the method for collecting the rotation speed data of the grinder motor and processing the rotation speed data in step S1 is:

[0014] S1.1 Every t 采样 Sampling speed data once per second, sampling n times in total, recording S n ;

[0015] S1.2 Take the arithmetic average of n data and get S 平均1 value;

[0016] S1.3Remove |S n -S 平均1 For the data with a value of |>50, the arithmetic mean is continued for the remaining data to obtain S 平均2 value.

[0017] By collecting motor speed data in real time and combining the two-level average values, S is calculated. 平均1 and S 平均2 Combined with outlier filtering, the degree of obstruction of foreign matter can be accurately determined.

[0018] Preferably, the method for determining whether to enable the anti-card program in step S2 is:

[0019] 3000≤S 平均2 <3500, anti-card program is not enabled;

[0020] 2000≤S 平均2 <3000, enable anti-card mode 1;

[0021] 1500≤S 平均2 <2000, enable anti-card mode 2;

[0022] 1000≤S 平均2 <1500, enable anti-card mode 3;

[0023] S 平均2 <1000, enable anti-card mode 4;

[0024] The strength of the anti-card mode is anti-card mode 4 > anti-card mode 3 > anti-card mode 2 > anti-card mode 1.

[0025] The anti-jamming mode is automatically matched according to the speed range, and different anti-jamming modes have different intensities.

[0026] Preferably, the parameter setting of not enabling the anti-jamming program is: always forward;

[0027] The parameters of anti-jamming mode 1 are set as: forward rotation for 3 seconds, reverse rotation for 3 seconds as one cycle, and the cycle is repeated twice;

[0028] The parameters of anti-jamming mode 2 are set as follows: forward rotation for 5 seconds, reverse rotation for 5 seconds as one cycle, and the cycle is repeated 3 times;

[0029] The parameters of anti-jamming mode 3 are set as follows: forward rotation for 7 seconds, reverse rotation for 7 seconds as one cycle, and the cycle is 4 times;

[0030] The parameters of anti-jamming mode 4 are set as: forward rotation for 10 seconds, reverse rotation for 10 seconds as one cycle, and the cycle is repeated 5 times.

[0031] Preferably, the method of judging the anti-stuck state in step S4 and outputting a normal working state or an anti-stuck failure alarm is as follows:

[0032] (1) After enabling anti-card mode 1, detect S 平均2 Values:

[0033] S 平均2 ≥3000, enters normal working state;

[0034] 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1;

[0035] S 平均2 <2000, enable anti-card mode 4;

[0036] (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values:

[0037] S 平均2 ≥3000, enters normal working state;

[0038] S 平均2 <3000, after 15S, anti-card mode 4 is enabled;

[0039] (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values:

[0040] S 平均2 ≥3000, enters normal working state;

[0041] S 平均2 <3000, output alarm.

[0042] Preferably, the method of judging the anti-stuck state in step S4 and outputting a normal working state or an anti-stuck failure alarm is as follows:

[0043] (1) After enabling anti-card mode 2, detect S 平均2 Values:

[0044] S 平均2 ≥3000, enters normal working state;

[0045] 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1;

[0046] 1500≤S 平均2 <2000, enable anti-card mode 4;

[0047] (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values:

[0048] S 平均2 ≥3000, enters normal working state;

[0049] S 平均2 <3000, after 15S, anti-card mode 4 is enabled;

[0050] (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values:

[0051] S 平均2 ≥3000, enters normal working state;

[0052] S 平均2 <3000, output alarm.

[0053] Preferably, the method of judging the anti-stuck state in step S4 and outputting a normal working state or an anti-stuck failure alarm is as follows:

[0054] (1) After enabling anti-card mode 3, detect S 平均2 Values:

[0055] S 平均2 ≥3000, enters normal working state;

[0056] 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1;

[0057] 1500≤S 平均2 <2000, after 15S, anti-stuck mode 2 is enabled again;

[0058] 1000≤S 平均2 <1500, after 15S, anti-stuck mode 3 is enabled again;

[0059] S 平均2 <1000, enable anti-card mode 4;

[0060] (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values:

[0061] S 平均2 ≥3000, enters normal working state;

[0062] S 平均2 <3000, after 15S, anti-card mode 4 is enabled;

[0063] (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values:

[0064] S 平均2 ≥3000, enters normal working state;

[0065] S 平均2 <3000, output alarm.

[0066] Preferably, the method of judging the anti-stuck state in step S4 and outputting a normal working state or an anti-stuck failure alarm is as follows:

[0067] (1) After enabling anti-card mode 4, detect S 平均2 Values:

[0068] S 平均2 ≥3000, enters normal working state;

[0069] 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1;

[0070] 1500≤S 平均2 <2000, after 15S, anti-stuck mode 2 is enabled again;

[0071] 1000≤S 平均2 <1500, after 15S, anti-stuck mode 3 is enabled again;

[0072] S 平均2 <1000, enable anti-card mode 4;

[0073] (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values:

[0074] S 平均2 ≥3000, enters normal working state;

[0075] S 平均2 <3000, after 15S, anti-card mode 4 is enabled;

[0076] (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values:

[0077] S 平均2 ≥3000, enters normal working state;

[0078] S 平均2 <3000, output alarm.

[0079] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0080] By collecting motor speed data in real time and combining the two-level average values, S is calculated. 平均1 and S 平均2With outlier filtering, the degree of foreign body jamming can be accurately determined. The anti-jamming mode is automatically matched according to the speed range, and the stuck residue can be effectively loosened through alternating forward and reverse operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The present invention will be further described below with reference to the accompanying drawings.

[0082] Figure 1 This is a schematic diagram of the dishwasher's internal circulation system. DETAILED DESCRIPTION

[0083] The working principle of the pulverizing and draining part of a dishwasher with a pulverizing and draining function in a household kitchen appliance is as follows.

[0084] like Figure 1 The crushing internal circulation process shown in the figure: when the dishwasher finishes a washing stage, the dishwasher main control board 1 controls the three-way valve 2 to close the drain port 3 and open the internal circulation port 4. At this time, the water cup 5, water pipe I6, crusher 7, water pipe II8, three-way valve 2, and water pipe III9 form an internal circulation loop. Then the crusher 7 motor is controlled to rotate forward to start the internal circulation. The large particles of residue deposited under the water cup 5 are mixed in the water flow and start to be washed as shown in the figure. Figure 1 The flow is reciprocating in the direction of the arrow, and the large particles of residue are broken into tiny particles under the stirring of the pulverizer 7 blades.

[0085] Example 1

[0086] The motor of the grinder 7 of the dishwasher adopts a brushless DC motor, and the motor speed is accurately detected by a Hall sensor. A stainless steel blade is installed on the motor rotor, so that the grinder 7 has the dual functions of drainage and crushing.

[0087] When the dishwasher is finished with one round of work, it enters the drainage program and starts the grinder 7.

[0088] The speed data is sampled once every 0.1 second, recorded as S1, S2, S3, S4, S5, S6, S7, and S8, for a total of 8 times.

[0089] Take the arithmetic mean of the 8 data and get S 平均1 Value, remove |S8-S 平均1 For the data with a value of |>50, the arithmetic mean is continued for the remaining data to obtain S 平均2 value.

[0090] When there is no foreign matter, S 平均2 The value is basically 3450±30 rpm, and the program processing directly records the current value.

[0091] According to the method of step S2, this value is 3000 平均2 ​<3500, so it is decided not to start the anti-card program.

[0092] When the user fails to clean up some debris such as vegetable leaves due to improper operation, these debris will enter the grinder 7 when the drainage program is started, causing the resistance of the stainless blade to increase significantly when rotating, and the rotation speed will also decrease, for example, to 2800 rpm.

[0093] According to the method of step S2, this value is 2000≤S 平均2 <3000, enable anti-stuck mode 1: forward rotation for 3 seconds, reverse rotation for 3 seconds as one cycle, cycle twice; loosen the foreign matter stuck on the blade. After the loosening process according to the method of step S4, re-test and obtain S 平均2 If the value is ≥3000, it is considered to be unblocked and the anti-jamming program will not be started.

[0094] According to the method of step S4, if the value is 2000≤S 平均2 <3000, enable anti-stuck mode 1: forward rotation for 3 seconds, reverse rotation for 3 seconds as one cycle, cycle twice; loosen the foreign matter stuck on the blade, and then test again after processing. The S 平均2 If the value is ≥3000, it is considered to be unblocked and the anti-jamming program will not be started.

[0095] If the value S 平均2 <3000, then start anti-card mode 4, and then test again to get S 平均2 If S 平均2 ≥3000, it is considered to be unblocked and in normal working state. 平均2 <3000, an alarm will be output.

[0096] In actual use, it is found that in case of mild jamming, after anti-jamming mode 1, the motor speed will basically reach more than 3000 rpm, and there is no need to start the anti-jamming program again.

[0097] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A control method for preventing foreign matter from getting stuck in a dishwasher, characterized in that: The steps include: S1: Collect the speed data of the grinder motor and process the speed data; S2: Determine whether to enable the anti-card program; S3: Execute anti-card procedure; S4: Determine the anti-stuck status and output the normal working status or anti-stuck failure alarm.

2. A method for controlling foreign matter jamming in a dishwasher according to claim 1, characterized in that: The method for collecting the rotation speed data of the grinder motor and processing the rotation speed data in step S1 is: S1.1 Every t 采样 Sampling speed data once per second, sampling n times in total, recording S n ; S1.2 Take the arithmetic average of n data and get S 平均1 value; S1.3Remove |S n -S 平均1 For the data with a value of |>50, the arithmetic mean is continued for the remaining data to obtain S 平均2 value.

3. A control method for preventing foreign matter from getting stuck in a dishwasher according to claim 2, characterized in that: The method for determining whether to enable the anti-card program in step S2 is: 3000≤S 平均2 <3500, anti-card program is not enabled; 2000≤S 平均2 <3000, enable anti-card mode 1; 1500≤S 平均2 <2000, enable anti-card mode 2; 1000≤S 平均2 <1500, enable anti-card mode 3; S 平均2 <1000, enable anti-card mode 4; The strength of the anti-card mode is anti-card mode 4 > anti-card mode 3 > anti-card mode 2 > anti-card mode 1.

4. A control method for preventing foreign matter from getting stuck in a dishwasher according to claim 3, characterized in that: The parameter setting for not enabling the anti-jamming program is: always forward; The parameters of anti-jamming mode 1 are set as: forward rotation for 3 seconds, reverse rotation for 3 seconds as one cycle, and the cycle is repeated twice; The parameters of anti-jamming mode 2 are set as follows: forward rotation for 5 seconds, reverse rotation for 5 seconds as one cycle, and the cycle is repeated 3 times; The parameters of anti-jamming mode 3 are set as follows: forward rotation for 7 seconds, reverse rotation for 7 seconds as one cycle, and the cycle is repeated 4 times; the parameters of anti-jamming mode 4 are set as follows: forward rotation for 10 seconds, reverse rotation for 10 seconds as one cycle, and the cycle is repeated 5 times.

5. A control method for preventing foreign matter from getting stuck in a dishwasher according to claim 4, characterized in that: Step S4 determines the anti-jamming state and outputs a normal working state or an anti-jamming failure alarm as follows: (1) After enabling anti-card mode 1, detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1; S 平均2 <2000, enable anti-card mode 4; (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, after 15S, anti-card mode 4 is enabled; (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, output alarm.

6. A method for controlling foreign matter jamming in a dishwasher according to claim 4, characterized in that: Step S4 determines the anti-jamming state and outputs a normal working state or an anti-jamming failure alarm as follows: (1) After enabling anti-card mode 2, detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1; 1500≤S 平均2 <2000, enable anti-card mode 4; (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, after 15S, anti-card mode 4 is enabled; (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, output alarm.

7. A control method for preventing foreign matter from getting stuck in a dishwasher according to claim 4, characterized in that: Step S4 determines the anti-jamming state and outputs a normal working state or an anti-jamming failure alarm as follows: (1) After enabling anti-card mode 3, detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1; 1500≤S 平均2 <2000, after 15S, anti-stuck mode 2 is enabled again; 1000≤S 平均2 <1500, after 15S, anti-stuck mode 3 is enabled again; S 平均2 <1000, enable anti-card mode 4; (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, after 15S, anti-card mode 4 is enabled; (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, output alarm.

8. A method for controlling foreign matter jamming in a dishwasher according to claim 4, characterized in that: Step S4 determines the anti-jamming state and outputs a normal working state or an anti-jamming failure alarm as follows: (1) After enabling anti-card mode 4, detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; 2000≤S 平均2 <3000, after 15S, enable anti-card mode 1; 1500≤S 平均2 <2000, after 15S, anti-stuck mode 2 is enabled again; 1000≤S 平均2 <1500, after 15S, anti-stuck mode 3 is enabled again; S 平均2 <1000, enable anti-card mode 4; (2) According to the anti-card mode enabled in step (1), detect S 平均2 Values: S 平均2 ≥3000, enters normal working state; S 平均2 <3000, after 15S, anti-card mode 4 is enabled; (3) According to the anti-card mode enabled in step (2), detect S 平均2 Values: S 平均2 ≥3000, enter normal working state; S 平均2 <3000, output alarm.

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