Vortex-flow blower device

Abstract

A vortex-flow blower device includes an impeller having a plurality of fins, a blower housing that has a vortex flow chamber for accommodating the impeller and extends from a start point on a side of a the fluid inlet port to an end point on a side of a fluid discharge port along the plurality of fins, a partitioning portion that blocks a communication between the end point and the start point in the vortex flow chamber, and a thermal fuse that is provided in the blower housing. The thermal fuse can be fused by a temperature rise so as to discharge the fluid on the side of the fluid discharge port to an outside, or communicate with the side of the fluid discharge port to the side of the fluid inlet port in the vortex flow chamber when the thermal fuse is fused.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Additional objects and advantages of the present invention will be more readily apparent from the following detailed description of preferred embodiments when taken together with the accompanying drawings. In the drawings:

FIGS. 1A and 1B are respectively a plan view illustrating a part of a blower housing, and a sectional view taken along the line IB-IB of FIG. 1A according to a first embodiment of the present invention;

FIG. 2 is a schematic sectional view of an electric air pump according to the first embodiment;

FIG. 3A is a plan view showing a part of a blower housing in a comparative example, and FIG. 3B is a plan view showing a part of a blower housing according to a second embodiment of the present invention;

FIG. 4 is a sectional view of an impeller according to a third embodiment of the present invention; and

FIG. 5 is a plan view illustrating a part of an electric air pump in a related art.

Claims

1. A vortex-flow blower device comprising: an impeller having a plurality of fins;a blower housing that has a fluid inlet port for introducing a fluid therein, a fluid outlet port for discharging the fluid, and a vortex flow chamber that accommodates the impeller and extends from a vortex start point on a side of the fluid inlet port to a vortex end point on a side of the fluid discharge port along the plurality of fins;a partitioning portion that blocks a communication between the vortex end point and the vortex start point in the vortex flow chamber; anda thermal fuse that is provided in the blower housing and is fused by a temperature rise so as to discharge the fluid on the side of the discharge port to an outside when the thermal fuse is fused.

2. The vortex-flow blower device of claim 1, wherein the thermal fuse is provided in the partitioning portion adjacent to the discharge port.

3. The vortex-flow blower device of claim 1, wherein the impeller is made of resin, and the impeller is deformed by the temperature rise in the blower housing to contact the blower housing at a position close to the thermal fuse such that the thermal fuse is fused by the temperature rise.

4. The vortex-flow blower device of claim 1, wherein the impeller is made of resin, and the impeller is deformed by the temperature rise in the blower housing to contact the thermal fuse such that the thermal fuse is fused by the temperature rise.

5. The vortex-flow blower device of claim 1, wherein the thermal fuse is a thin wall portion integrally molded in the blower housing made of resin.

6. The vortex-flow blower device of claim 1, wherein the thermal fuse is a thin wall portion provided in the partitioning portion made of a resin, andwherein the partitioning portion has a recess portion recessed from an outer wall surface of the partitioning portion to form the thermal fuse.

7. A vortex-flow blower device comprising: an impeller having a plurality of fins;a blower housing that has a fluid inlet port for introducing a fluid therein, a fluid outlet port for discharging the fluid, and a vortex flow chamber that accommodates the impeller and extends from a vortex start point on a side of the fluid inlet port to a vortex end point on a side of the fluid discharge port along the plurality of fins;a partitioning portion that blocks a communication between the vortex end point and the vortex start point in the vortex flow chamber; anda thermal fuse provided in the blower housing, wherein the thermal fuse is fused by a temperature rise such that the side of the discharge port communicates with the side of the inlet port in the vortex flow chamber when the thermal fuse is fused.

8. The vortex-flow blower device of claim 7, wherein the thermal fuse is provided in the blower housing between the discharge port and the inlet port.

9. The vortex-flow blower device of claim 7, wherein the thermal fuse is provided in the partitioning portion at a position adjacent to the discharge port.

10. The vortex-flow blower device of claim 7, wherein the impeller is made of resin, and the impeller is deformed by the temperature rise in the blower housing to contact the blower housing at a position close to the thermal fuse such that the thermal fuse is fused by the temperature rise.

11. The vortex-flow blower device of claim 7, wherein the impeller is made of resin, and the impeller is deformed by the temperature rise in the blower housing to contact the thermal fuse such that the thermal fuse is fused by the temperature rise.

12. The vortex-flow blower device of claim 7, wherein the thermal fuse is a thin wall portion integrally molded in the blower housing made of resin.

13. A vortex-flow blower device comprising: an impeller having a plurality of fins;a blower housing that has a fluid inlet port for introducing a fluid therein, a fluid outlet port for discharging the fluid, and a vortex flow chamber that accommodates the impeller and extends from a vortex start point on a side of the fluid inlet port to a vortex end point on a side of the fluid discharge port along the plurality of fins;a partitioning portion that blocks a communication between the vortex end point and the vortex start point in the vortex flow chamber; anda thermal fuse provided in the blower housing, wherein the thermal fuse is fused by a temperature rise to be opened.