Drainage control method for multi-drum washing machine

Abstract

A multi-drum washing machine comprises at least two washing devices and a drainage pump communicating with the outside. Between each washing device and the drainage pump is respectively provided with a drainage valve. Each washing device of the multi-drum washing machine drains water sequentially. When a washing device completes the drainage, first, the drainage valve of the washing machine is closed, and then the drainage pump is turned off. It is detected whether or not other washing device requires drainage, and if yes, first the drainage valve of the washing device requiring drainage is opened, and then the drainage pump is turned on for the washing device draining water, and if no, the drainage of the multi-drum washing machine ends. The disclosure controls sequential drainage of each washing device, reducing vibration of a washing machine in the drainage process.

1 . A drainage control method for multi-drum washing machine, which comprises at least two washing devices, a drainage pump communicating with outside, and a drainage valve respectively provided between each washing device and the drainage pump, comprising,
 each washing device of the multi-drum washing machine draining water sequentially,   after a drainage of a first washing device is completed, first the drainage valve of the washing device being closed, then the drainage pump being turned off, and   detecting whether or not another washing device requires drainage,   if yes, first the drainage valve of the other washing device that requires drainage being opened, and then the drainage pump is turned on for the other washing device to drain water, and   if no, a drainage of the multi-drum washing machine being completed.   
     
     
         2 . The drainage control method for multi-drum washing machine according to  claim 1 , wherein after a completion of the drainage of the washing device, it is determined whether or not the drainage pump is in a working progress,
 if no, the drainage pump continues to execute another operating time sequence, then a determination is performed again;   if yes, it is continued to determine a working time for the drainage pump being in the working process.   
     
     
         3 . The drainage control method for multi-drum washing machine according to  claim 2 , wherein the operating time sequence of the drainage pump is a single cycle time sequence for the drainage pump to execute a whole working progress and a stopping progress, and
 a working progress time is set to be T 1 , and a stopping time is set to be T 2 , and a total time of the operating time sequence of the drainage pump is T 3 =T 1 +T 2 .   
     
     
         4 . The drainage control method for multi-drum washing machine according to  claim 2 , wherein if the working time of the drainage pump is within a first ⅓ of a total time of the working progress, the drainage valve of the washing device is closed, and
 if no, after a completion of the operating time sequence executed by the drainage pump, the drainage pump continues to execute another operating time sequence, and then it is determined whether or not the drainage pump is in the working progress. 
 
     
     
         5 . The drainage control method for multi-drum washing machine according to  claim 1 , wherein after a drainage process of the washing device is started, it is determined whether or not another washing device performs the drainage progress,
 if yes, waiting until the completion of the drainage of another washing device, and then stating the drainage process,   if no, directly starting the drainage process.   
     
     
         6 . The drainage control method for multi-drum washing machine according to  claim 1 , wherein after the completion of the drainage of the washing device, first the drainage valve of the washing device is closed, and then it is determined whether or not the drainage pump stops working,
 if no, the drainage pump executes the operating time sequence till an end, and then the determination is performed again;   if yes, the drainage valve of the other washing device is opened, or the drainage of the multi-drum washing machine is completed.   
     
     
         7 . The drainage control method for multi-drum washing machine according to  claim 1 , wherein after the drainage valve of the washing device is opened, and then the drainage pump is turned on to drain water for the washing device over a set waiting time T 4 . 
     
     
         8 . The drainage control method for multi-drum washing machine according to  claim 7 , wherein the waiting time T 4  is set based on a drainage rate and a length of a pipeline between the drainage valve and the drainage pump of the multi-drum washing machine. 
     
     
         9 . The drainage control method for multi-drum washing machine according to  claim 7 , wherein during the drainage of the washing device, it is determined whether or not the drainage of the washing device is completed,
 if yes, it is determined whether or not the drainage pump is in the working progress,   if no, the drainage pump continues executing the drainage.   
     
     
         10 . The drainage control method for multi-drum washing machine according to  claim 2 , wherein after a drainage process of the washing device is started, it is determined whether or not another washing device performs the drainage progress,
 if yes, waiting until the completion of the drainage of another washing device, and then stating the drainage process,   if no, directly starting the drainage process.   
     
     
         11 . The drainage control method for multi-drum washing machine according to  claim 3 , wherein after a drainage process of the washing device is started, it is determined whether or not another washing device performs the drainage progress,
 if yes, waiting until the completion of the drainage of another washing device, and then stating the drainage process,   if no, directly starting the drainage process.   
     
     
         12 . The drainage control method for multi-drum washing machine according to  claim 4 , wherein after a drainage process of the washing device is started, it is determined whether or not another washing device performs the drainage progress,
 if yes, waiting until the completion of the drainage of another washing device, and then stating the drainage process,   if no, directly starting the drainage process.   
     
     
         13 . The drainage control method for multi-drum washing machine according to  claim 3 , wherein after the completion of the drainage of the washing device, first the drainage valve of the washing device is closed, and then it is determined whether or not the drainage pump stops working,
 if no, the drainage pump executes the operating time sequence till an end, and then the determination is performed again;   if yes, the drainage valve of the other washing device is opened, or the drainage of the multi-drum washing machine is completed.   
     
     
         14 . The drainage control method for multi-drum washing machine according to  claim 4 , wherein after the completion of the drainage of the washing device, first the drainage valve of the washing device is closed, and then it is determined whether or not the drainage pump stops working,
 if no, the drainage pump executes the operating time sequence till an end, and then the determination is performed again;   if yes, the drainage valve of the other washing device is opened, or the drainage of the multi-drum washing machine is completed.   
     
     
         15 . The drainage control method for multi-drum washing machine according to  claim 2 , wherein after the drainage valve of the washing device is opened, and then the drainage pump is turned on to drain water for the washing device over a set waiting time T 4 . 
     
     
         16 . The drainage control method for multi-drum washing machine according to  claim 3 , wherein after the drainage valve of the washing device is opened, and then the drainage pump is turned on to drain water for the washing device over a set waiting time T 4 . 
     
     
         17 . The drainage control method for multi-drum washing machine according to  claim 4 , wherein after the drainage valve of the washing device is opened, and then the drainage pump is turned on to drain water for the washing device over a set waiting time T 4 . 
     
     
         18 . The drainage control method for multi-drum washing machine according to  claim 7 , wherein the waiting time is 3 s≤T 4 ≤6 s.