Patent Publication Number: US-2013243573-A1

Title: Smart pump

Description:
BACKGROUND OF THE INVENTION 
     1. Field of Invention 
     The present invention relates to pump technologies, and in particular, to a smart water pump capable of determining a water level and controlling working of the water pump. 
     2. Related Art 
     At present, to meet the market demand, water pump manufacturers develop a smart water pump, which starts pumping when the water level reaches 1.5 inches and stops pumping when the water level drops to 0.25 inch. Floating balls of the current universal floaters are heavy, and the depth of floating ball pools is much greater than 0.25 inch, so in general cases, the current floaters are inapplicable. The manufacturers have launched a water pump with an electric controller. In this type of water pump, it is determined whether water is pumped on the basis of different rotating speeds of the motor when water is pumped and when water is not pumped. This type of water pump has the following disadvantages: first, the motor starts rotation at a certain time interval even water is unavailable, to detect whether water can be pumped; second, the inconsistency of the water pump may lead to exceptions in many cases. For example, the water pump does not work water is available, or works constantly when water is unavailable. 
     SUMMARY OF THE INVENTION 
     The technical problem to be solved by the present invention is to provide a smart water pump capable of automatically controlling the working of the water pump on the basis of different water levels. 
     The present invention employs the following technical solution to solve the technical problem thereof: a smart water pump, including a housing; an outlet box cover is arranged on the top of the housing; a power plug is arranged at an upper part of the outlet box cover; a circuit board is arranged within the housing; a rotor and a stator are arranged under the circuit board; a motor front cover is arranged at a lower part of the circuit board; a turbine housing is arranged under the motor front cover, and an impeller is arranged within the turbine housing; the impeller shares a rotary shaft with the rotor; a water outflow pipe is arranged on one side of the housing, and a water level sensor is arranged on the other side of the housing. 
     To determine a water level and better control the water pump on the basis of the water level, the water level sensor includes a sensor box, and a sensing probe is arranged on the sensor box; the sensing probe includes a high water level probe, a low water level probe, and a ground probe; the high water level probe is shorter than the low water level probe, and the low water level probe is shorter than the ground probe. 
     To filter out impurities in water and reduce damage to the water pump, a strainer is arranged under the turbine, and a small strainer is arranged under a position where the water level sensor is installed in the housing. 
     The present invention has the following beneficial effects: the water level sensor is used, so the rotation of the water pump can be controlled on the basis of the water level, ameliorating a common scenario with existing water pumps in which the water pump does not work when water is available and works when water is unavailable 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic structural view of the present invention; and 
         FIG. 2  is a schematic structural view of a water level sensor according to the present invention. 
     
    
    
     The meaning of the numerals in the drawings is as follows:  1 : power plug,  2 : circuit board,  3 : rotary shaft,  4 : rotor,  5 : housing,  6 : stator,  7 : motor front cover,  8 : turbine housing,  9 : strainer,  10 : impeller,  11 : small strainer,  12 : water level sensor,  13 : outlet box cover,  14 : water outflow pipe,  15 : sensor box,  16 : high water level probe,  17 : low water level probe,  18 : ground probe. 
     DETAILED DESCRIPTION OF THE INVENTION 
     The present invention is further described in the following with reference to the accompanying drawings. 
     A smart water pump shown in  FIG. 1  includes a housing  5 . An outlet box cover  13  is arranged on the top of the housing. A power plug  1  is arranged at an upper part of the outlet box cover  13 . A circuit board  2  is arranged within the housing  5 ; a rotor  4  and a stator  6  are arranged under the circuit board  2 . A motor front cover  7  is arranged at a lower part of the housing  5 . A turbine housing  8  is arranged under the motor front cover  7 , and an impeller  10  is arranged within the turbine housing  8 . The impeller  10  shares a rotary shaft  3  with the rotor  4 . A water outflow pipe  14  is arranged on one side of the housing  5 , and a water level sensor  12  is arranged on the other side of the housing  5 . A strainer  9  is arranged under the turbine housing  8 , and a small strainer  11  is arranged under a position where the water level sensor  12  is installed in the housing  5 . 
     The water level sensor  12  shown in  FIG. 2  includes a sensor box  15 , and a sensing probe is arranged on the sensor box  15 ; the sensing probe includes a high water level probe  16 , a low water level probe  17 , and a ground probe  18 ; the high water level probe  16  is shorter than the low water level probe  17 , and the low water level probe  17  is shorter than the ground probe  18 . 
     The water level sensor  12  is controlled by a control board so as to sense the water level. When the water level reaches the head of the high water level probe  16 , the control board controls the water pump to pump water, and the water level drops as water is pumped; when the water level is lower than the head of the low water level probe  17 , the water pump stops working The probe senses the water level, and the action of the water pump is thus controlled, ameliorating a common scenario in which the water pump does not work when water is available and works when water is unavailable, and saving resources. 
     The specific application example is described above, which does not limit the protection scope of the present invention. Any technical solution using equivalent replacement or equivalent alteration shall fall within the protection scope of the appended claims.