ELECTRIC WATER PUMP WITH COOLANT PASSAGE

• US 20160047394A1
• Filed: 12/02/2014
• Published: 02/18/2016
• Est. Priority Date: 08/18/2014
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: LEE, Bong Sang
• Application Number:
  US14/558,605
• Publication Number:
  US 20160047394A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 13/0606 Canned motor pumps
• CPC Class Codes: F04D 29/426 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/5806 Cooling the drive system

Abstract

An electric water pump includes an electric motor having a stator which generates an electromagnetic field by control signals supplied from a pump driver. A rotor rotates by the electromagnetic field generated by the stator. An impeller is connected to and rotates with the rotor to circulate a coolant. An inside space of the electric water pump may include a motor room in which the electric motor is disposed, a volute room in which the impeller is positioned, and a pump driver room in which the pump driver is positioned.

Claims

1. An electric water pump comprising:

an electric motor having a stator which generates an electromagnetic field by control signals supplied from a pump driver, and a rotor which rotates by the electromagnetic field generated by the stator; and

an impeller connected to and rotating with the rotor to circulate a coolant,

wherein an inside space of the electric water pump includes;

a motor room in which the electric motor is disposed;

a volute room in which the impeller is disposed; and

a pump driver room in which the pump driver is disposed.

2. The electric water pump of claim 1, further comprising:

a bulkhead separating the motor room and the pump driver room to seal the motor room and the pump driver room with respect to each other;

a separation wall separately forming a rotor room inside the motor room to isolate the rotor from the motor room; and

a cap mounted to a front surface of the bulkhead to support one end of the separation wall,

wherein a front side of the rotor room fluidly communicates with the volute room to flow the coolant into the rotor room.

3. The electric water pump of claim 2, further comprising:

an insulation pad for insulating the pump driver from the bulkhead.

4. The electric water pump of claim 2, further comprising:

a first cooling passage formed in one side of a water pump housing or a motor room cover for sealing the motor room from outside;

a second cooling passage of which one end is connected to the first cooling passage, the second cooling passage penetrating the bulkhead; and

a third cooling passage connected to another end of the second cooling passage and formed in another side of the water pump housing or the motor room cover,

wherein a portion of the coolant passing through the volute room flows through the first cooling passage, the second cooling passage, and the third cooling passage.

5. The electric water pump of claim 4, wherein

the first cooling passage and the third cooling passage are formed in a length direction of the electric water pump.

6. The electric water pump of claim 4, wherein

the second cooling passage passes through a middle of the bulkhead.

7. The electric water pump of claim 4, wherein

at least one coolant flow passage is integrally formed by the first cooling passage, the second cooling passage, and the third cooling passage.

8. The electric water pump of claim 1, wherein the volute room has an inlet and outlet through which the coolant flows by rotation of the impeller and flows out.