Device for canceling acoustic noise generated by a pump

Patent metadata

Field	Value
Publication number	US-12203469-B2
Application number	US-202217702208-A
Country	US
Kind code	B2
Filing date	Mar 23, 2022
Priority date	Sep 14, 2021
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A device for canceling acoustic noise generated includes, in one example, an inlet channel configured to be fluidly connected to an inlet port of a pump and an outlet channel configured to be fluidly connected to an outlet port of the pump. The device also includes an inlet resonator and an outlet resonator, both having open ends and closed ends. The open ends of the inlet and outlet resonators are fluidly connected to the inlet and outlet channels, respectively. When in operation, the inlet and outlet resonators can cancel noise generated by the operation of the pump.

First claim

What is claimed is:

1. A device comprising:
a pump having an inlet port and an outlet port, wherein the pump is configured to draw liquid from the inlet port and discharge the liquid from the outlet port;
an inlet channel connected to the inlet port and having an inlet resonator that includes an open end and a closed end;
an outlet channel connected to the outlet port and having an outlet resonator that includes an open end and a closed end;
a housing, wherein the pump, the inlet resonator, and the outlet resonator are located within an inside space defined by the housing; and
a housing resonator having an open end and a closed end, the housing resonator being disposed within the inside space defined by the housing, wherein the housing resonator is not fluidly connected to the inlet resonator or the outlet resonator, the housing resonator having a resonant frequency substantially equal to a frequency of a sound emitted by a vibration of a casing of the pump caused by the operation of the pump.

2. The device of claim 1 , wherein the inlet resonator and the outlet resonator are quarter-wavelength resonators having different lengths.

3. The device of claim 2 , wherein lengths of at least one of the inlet resonator and the outlet resonator are defined by L=(c/f res )/4, wherein L is the lengths of at least one of the inlet resonator and the outlet resonator, c is the speed of sound, and f res is a resonant frequency of the at least one of the inlet resonator and the outlet resonator.

4. The device of claim 1 , wherein the housing resonator is a quarter wavelength resonator.

5. The device of claim 4 , wherein a length of the housing resonator is defined by L=(c/f res )/4, wherein L is the length of the housing resonator, c is the speed of sound, and f res is a resonant frequency of the housing resonator.

6. The device of claim 1 , wherein:
the inlet resonator comprises a plurality of inlet resonators each having open ends and closed ends, wherein the open ends of the plurality of inlet resonators are fluidly connected to the inlet channel, and
the plurality of inlet resonators having resonant frequencies that differ from one another.

7. The device of claim 6 , wherein the plurality of inlet resonators are spaced apart in at least one of a radial direction and a lengthwise direction defined by the length of the inlet channel.

8. The device of claim 1 , wherein:
the outlet resonator comprises a plurality of outlet resonators each having open ends and closed ends, wherein the open ends of the plurality of outlet resonators are fluidly connected to the outlet channel; and
the plurality of outlet resonators having resonant frequencies that differ from one another.

9. The device of claim 8 , wherein the plurality of outlet resonators are spaced apart in at least one of a radial direction and a lengthwise direction defined by the length of the outlet channel.

10. The device of claim 1 , wherein the pump is a micropump.

11. A system comprising:
an inlet channel configured to be connected to an inlet port of a pump, the inlet channel having an inlet resonator with an open end and a closed end;
an outlet channel configured to be connected to an outlet port of the pump, the outlet channel having an outlet resonator with an open end and a closed end;
wherein the pump is configured to pump liquid from the inlet port to the outlet port;
a housing, wherein the inlet resonator and the outlet resonator are located within an inside space defined by the housing;
a housing resonator having an open end and a closed end, the housing resonator being disposed within the inside space defined by the housing, wherein the housing resonator is not fluidly connected to the inlet resonator or the outlet resonator; and
the housing resonator having a resonant frequency substantially equal to a frequency of a sound emitted by a vibration of a casing of the pump caused by the operation of the pump.

12. The system of claim 11 , wherein the inlet resonator and the outlet resonator are quarter-wavelength resonators having different lengths.

13. The system of claim 11 , wherein:
the inlet resonator comprises a plurality of inlet resonators each having open ends and closed ends, wherein the open ends of the plurality of inlet resonators are fluidly connected to the inlet channel; and
the plurality of inlet resonators having resonant frequencies that differ from one another.

14. The system of claim 11 , wherein:
the outlet resonator comprises a plurality of outlet resonators each having open ends and closed ends, wherein the open ends of the plurality of outlet resonators are fluidly connected to the outlet channel; and
the plurality of outlet resonators having resonant frequencies that differ from one another.

15. The system of claim 11 , wherein the pump is a micropump.

Assignees

• Toyota Eng & Mfg North America

Inventors

• Lee Taehwa
• Li Xiaopeng
• Tsuruta Ryohei
• Rowe Michael Paul
• Prokhorov Danil V

Classifications

• F04B43/043

  Micropumps · CPC title

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title

• F04B45/047

  Pumps having electric drive · CPC title

• F04B39/123

  Fluid connections · CPC title

• F04B39/0088

  using mechanical tuned resonators · CPC title