JP2948176B2 - Structure of air pump inlet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an air pump inlet for supplying air to a septic tank, for example.

[0002]

2. Description of the Related Art In a conventional structure of an intake port for an air pump, air (atmosphere) passes through an air cleaner and is sucked into a pump body. The air discharged from the pump body is supplied to a septic tank or the like through a check valve provided at a discharge port of the pump body. Therefore, even if the driving of the pump body is stopped during the supply of the air, the reverse flow of the already supplied air is prevented by the check valve.

[0003]

In such a structure of the intake port, if the area of the intake port is too small with respect to the amount of air sucked toward the air cleaner, the motor serving as a driving source of the pump body is not provided. Overloaded,
Conversely, if the area of the suction port is too large with respect to the amount of intake air, air suction noise is generated. Therefore, it is necessary to adjust the area (such as the hole diameter) of the suction port according to the change in the amount of intake air.

It is an object of the present invention to automatically configure a passage having a flow area corresponding to an intake air amount, to prevent an overload on a motor and the like, and to reduce suction noise.

It is an object of the present invention to reduce the size of the air pump inlet by integrally forming a check valve and an air cleaner for preventing a backflow of supplied air.

[0006]

According to the first aspect of the present invention,
An intake port for an air pump in which intake air passes through a filter of an air cleaner and is sucked into a pump body,
A check valve that opens and closes with respect to an intake port of intake air flowing toward the air cleaner is provided so as to maintain an opening corresponding to the intake air amount.

As described above, since the check valve of the intake port opens and closes so as to have an opening corresponding to the intake air amount, as a result, a passage having an area corresponding to the intake air amount is automatically formed. The Rukoto. As a result, overload on the motor and the like and generation of suction noise can be prevented without artificially adjusting the hole diameter of the suction port.

According to a second aspect of the present invention, there is provided the structure of the intake port for the air pump according to the first aspect, wherein the intake port having the check valve and the air cleaner are integrally formed. As a result, the structure of the air pump inlet can be made compact.

[0009]

Embodiments of the present invention will be described below. FIG. 1 is an external view showing the structure of the air pump intake port. As shown in this drawing, a rotary blower type pump main body 12 is arranged on a bed 10. The pump body 12 is rotatably driven by a motor or the like (not shown), whereby air (atmosphere) is sucked into the pump body 12 through the air cleaner 20 and the connection pipe 16. The air discharged from the discharge port 14 of the pump body 12 is supplied to a septic tank or the like.

FIG. 2 is a sectional view showing the internal structure of the intake port. As is clear from this drawing, the air cleaner 2
The outer shell 0 is constituted by a housing 22 and a cover 38, and the inside thereof is divided into two upper and lower chambers by an intermediate wall 24 integrated with the housing 22.
The intermediate wall 24 has a plurality of through-holes 26 communicating the upper and lower chambers.

In the lower chamber, the intermediate wall 24 is provided.
Continuous passage 2 from the center of the housing to the peripheral wall of the housing 22
8 are formed. That is, the passage 28 and the lower chamber are spaces independent of each other. The passage 28 communicates with the inside of a pipe 30 having one end (lower end) connected to the center of the intermediate wall 24 from the upper chamber side. The other end (upper end) of the tube 30 is closed.
Moreover, the passage 28 is open to the outside on the peripheral wall side of the housing 22, and the connection pipe 16 is connected to the passage 28.

The interior of the upper chamber is further separated by a partition plate 34 into a space on the housing 22 side and a space on the cover 38 side. These two spaces are communicated with each other by a plurality of through holes 36 formed at locations from the outer periphery of the partition plate 34. The tube 30 has a plurality of through holes 32 formed in the space on the side of the cover 38. The cover 38 is detachably fixed to the housing 22 by a lock bolt 40 screwed into the upper end of the tube 30 from outside.

In the space on the side of the cover 38, a pipe 30 is provided.
And the filter 4 between each of the through holes 36 of the partition plate 34.
2 are provided. Therefore, the air that has entered the upper chamber from the lower chamber through each through hole 26 of the intermediate wall 24 flows into the space on the side of the cover 38 through the through hole 36 of the partition plate 34, passes through the filter 42, 30 is led to the passage 28 through the through hole 32.

On the other hand, the lower chamber has a configuration in which the open lower surface is closed by a cover plate 44.
Is formed with a plurality of suction ports 46 for communicating the inside of the lower chamber with the outside. The lid plate 44 is attached to the housing 22 by a lock bolt 48 screwed into the wall 28a of the passage 28 from outside.

A central portion of a check valve 50 formed in a disc shape is sandwiched and fixed between the inner surface of the cover plate 44 and the wall portion 28a of the passage 28. This check valve 5
Numeral 0 is formed of an elastic body such as urethane rubber, and in the free state, the suction ports 46 are closed from the inside of the cover plate 44. Therefore, the check valve 50 functions to allow the flow of the intake air flowing from the outside of the housing 22 to the inside through the respective suction ports 46 and to prevent the reverse flow.

In the air pump inlet constructed as described above, the air is pushed and opened from each of the inlets 46 as shown by phantom lines in FIG. It is sucked into the housing 22. The intake air is filtered by passing through the filter 42 of the air cleaner 20 as described above, and then is sucked into the pump body 12 through the passage 28.

The check valve 50 opens and closes according to the amount of intake air from each intake port 46. As a result, an intake passage having an area corresponding to the amount of intake air is automatically formed. Therefore, a phenomenon that an excessive load is applied to the motor that is a driving source of the pump body 12 when the area of the passage is too small with respect to the intake air amount, and conversely, occurs when the passage area is too large with respect to the intake air amount Both phenomena such as the sound of the air being sucked are eliminated.

Further, since the check valve 50 is set in a position (vertical position) in which each suction port 46 is closed by its own weight, even if the pump body 12 is stopped even with a simple structure. Each inlet 46 is securely closed, and the backflow of the already supplied air is prevented. In addition, since the check valve 50 and the air cleaner 20 have an integrated structure, the structure of the air pump inlet is compact, and the cost can be reduced. To clean the filter 42, loosen the lock bolt 40 and remove the cover 3
This can be easily performed by removing the housing 8 from the housing 22.

[Brief description of the drawings]

FIG. 1 is an external view showing a structure of an air pump intake port.

FIG. 2 is a sectional view showing an internal structure of an intake port.

[Explanation of symbols]

 12 Pump body 20 Air cleaner 42 Filter 46 Inlet 50 Check valve

Claims (2)

(57) [Claims] An intake port for an air pump in which intake air passes through a filter of an air cleaner and is sucked into a pump body, wherein an intake port of intake air flowing toward the air cleaner is provided according to an intake air amount. A check valve operable to open and close so as to maintain an open degree. 2. The structure of the air pump intake port according to claim 1, wherein the intake port provided with a check valve and the air cleaner are integrated with each other.