Diaphragm pump

• US 20070065309A1
• Filed: 08/28/2006
• Published: 03/22/2007
• Est. Priority Date: 09/06/2005
• Status: Abandoned Application

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Nakajima, Jiro, Onishi, Hitoshi
• Application Number:
  US11/511,683
• Publication Number:
  US 20070065309A1
• Time in Patent Office: Days
• US Class Current: 417/413.100
• CPC Class Codes: F04B 43/023 double acting plate-like flexible member
• CPC Class Codes: F04B 43/046 with piezoelectric drive

Abstract

A diaphragm pump is provided. The diaphragm pump comprises an upper and lower housing, a pump chamber plate, a pair of pump chambers, and a diaphragm that separates the pair of pump chambers. First and second suction-side check valves are disposed between the pair of pump chambers and a suction port. First and second discharge-side check valves are disposed between the pair of pump chambers and a discharge port. The lower housing comprises a first pump chamber concave portion. The pump chamber plate comprises a second pump chamber concave portion, the second suction-side check valve, and the second discharge-side check valve. An interplate suction-side channel and an interplate discharge-side channel are provided between the upper housing and the pump chamber plate.

Claims

1. A diaphragm pump comprising:

an upper and lower housing;

a pump chamber plate;

a pair of pump chambers;

a diaphragm that separates the pair of pump chambers;

first and second suction-side check valves between the pair of pump chambers and a suction port; and

first and second discharge-side check valves between the pair of pump chambers and a discharge port,

wherein the lower housing comprises a first pump chamber concave portion,

wherein the pump chamber plate comprises a second pump chamber concave portion, the second suction-side check valve, and the second discharge-side check valve, and

wherein an interplate suction-side channel and an interplate discharge-side channel are provided between the upper housing and the pump chamber plate.

2. The diaphragm pump according to claim 1, wherein the suction port includes the first suction-side check valve in communication with the first pump chamber forming concave portion, and the discharge port includes the first discharge-side check valve in communication with the first pump chamber forming concave portion.

3. The diaphragm pump according to claim 2, wherein the interplate suction-side channel is bifurcated from the suction port of the lower housing and connected to the second suction-side check valve and the interplate discharge-side channel is bifurcated from the discharge port of the lower housing and connected to the second discharge-side check valve.

4. The diaphragm pump according to claim 3, wherein the interplate suction-side channel and the interplate discharge-side channel are sealed with a seal ring inserted between the pump chamber plate and the upper housing.

5. The diaphragm pump according to claim 4, wherein one end of the interplate suction-side channel and one end of the interplate discharge-side channel communicate with the second suction-side check valve and the second discharge-side check valve, and the other ends of the interplate suction-side channel and the interplate discharge-side channel communicate with the channels bifurcated from the suction and discharge ports that open to the lower housing.

6. The diaphragm pump according to claim 4, wherein the seal ring has an oval shape.

7. The diaphragm pump according to claim 1, wherein the first suction-side check valve and the first discharge-side check valve are formed as a first suction-side check valve unit and a first discharge-side check valve unit that are separate from the lower housing, and the first suction-side check valve unit and the first discharge-side check valve unit are attached to pump chamber-side opening ends of the suction and discharge ports.

8. The diaphragm pump according to claim 7, wherein the first suction-side check valve unit and the first discharge-side check valve unit are provided on the same substrate.

9. The diaphragm pump according to claim 1, wherein the suction and discharge ports of the lower housing are protruded in parallel with each other in the plane direction of the diaphragm in a free state.

10. The diaphragm pump according to claim 1, wherein the check valve has an umbrella shape.

11. The diaphragm pump according to claim 1, wherein the diaphragm is a piezoelectric oscillator or an electrostriction oscillator.

12. The diaphragm pump according to claim 1, wherein the diaphragm is a bimorph type piezoelectric oscillator.