JP3410406B2 - Liquid drainage pump - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid drainage pump (water pump) used inside an air conditioner used at home.

[0002]

2. Description of the Related Art In recent years, drain drain pumps for air conditioners used at home have been required to quickly drain condensed water without raising noise generated during operation.

Conventionally, as this type of liquid drainage pump, those shown in FIGS. 11 to 14 have been known as an example. Less than,
The configuration will be described with reference to the drawings. As shown in the figure, a suction port 102 is provided on the small diameter side of the curved surface 101 whose diameter gradually increases, and a discharge port 103 is radially projected on the large diameter side.
Cover 105 and cover 10 for closing the upper opening of the
5 is mounted on the drive motor 106 disposed above the drive motor 106 and the rotary drive shaft 107 of the drive motor 106, and is rotated while maintaining a small gap in the pump body 104 so as not to contact the curved surface 101. Rotating blade 1 with blade 108
Reference numeral 08 denotes three flat blades 109 protruding in the radial direction.
It was composed by.

When the rotary blade 108 is rotated by the drive motor 106, the drain water is sucked up along the curved surface 101 from the suction port 102 located in the drain water, and discharged from the discharge port 103 provided on the large diameter side. Was discharged to the drain water.

[0005]

In such a conventional liquid drainage pump, the discharge port 103 is provided so as to project in the radial direction passing through the axial center, and the vane plate 109 of the rotary vane 108 is simply a flat plate. Because it is formed on the blade plate 1
The discharge port 103 is positioned at a right angle to the rotation of 09, and the frying sound of the liquid at the initial stage of operation and the frying noise at the time of stable operation are high, and there is a problem that the lift, the flow rate and the efficiency are still insufficient. It is required to reduce the noise during the frying, and to reduce the power consumption while maintaining the head and the flow rate.

The present invention is to solve the above problems, and has a structure for providing a liquid drainage pump capable of achieving low noise during liquid scooping and low power consumption while maintaining the head and flow rate. This is the first purpose.

A second object is to reduce noise due to backflow when the pump is stopped.

[0008]

In order to achieve the above first and second objects, the liquid drainage pump of the present invention has a conical portion having a small diameter on the lower side and a large diameter on the upper side. , A pump body provided with a suction port on the small diameter side and a discharge port substantially tangential to the large diameter side, and a plurality of pump bodies provided on the pump body for sucking up liquid from the suction port and discharging the liquid from the discharge port. A structure in which a rotary blade having a blade and a motor for driving the rotary blade are provided, the blade of the rotary blade is curved in a rotation direction, and a curved convex portion side of the blade rotates toward an opposite ejection port. And the central part of the rotary vane
Is a structure with a concave main plate attached.

The liquid drainage pump of the present invention has the above-mentioned first and second aspects.
In order to achieve the second object, the second means has a conical portion having a small diameter on the lower side and a large diameter on the upper side, the suction port is provided on the small diameter side, and the discharge port is substantially tangential to the large diameter side. A pump body, a pump body, a rotary blade provided in the pump body, the rotary blade having a plurality of blade plates for sucking up liquid from the suction port and discharging the liquid from the discharge port, and driving the rotary blade. a motor, a blade plate of the rotary blade, curved the rotary blade in the rotational direction, the curved concave side of the vane is configured so as to rotate toward the vomiting outlet side,且
A configuration in which a central plate with a concave center is attached to the rotary blade
And

Further, in order to achieve the first and second objects, the third means has a conical portion having a small diameter on the lower side and a large diameter on the upper side, and the suction port is provided on the small diameter side. A pump body provided with a discharge port in a substantially tangential direction on the radial side, the pump body, and a rotation provided with a plurality of vanes so as to suck liquid from the suction port and discharge it from the discharge port. A vane and a motor for driving the rotary vane, the vane plate of the rotary vane and a radial vane plate which does not bend the rotary vane, and is installed so as to rotate toward a side opposite to the discharge port , and , The central part of the rotary blade
It is configured with a concave main plate .

In order to achieve the first and second objects, in addition to the first to third means, the fourth means is such that the area of the discharge port of the pump is smaller than the area of the suction port. It will be configured.

Further, in order to achieve the first and second objects, a fifth means is, in addition to the first to fourth means, a suction side end surface of the suction port provided in the pump body. Has a bell-mouth shape or a conical shape.

[0013]

[0014]

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, by the constitution of the above-mentioned first to fifth means, noise at the time of scooping up liquid is reduced, and the head and flow rate are improved, and a motor having a small size for maintaining a predetermined value. It is possible to reduce the power consumption. Also reduces backflow during pump stoppage can be reduced noise generation during reverse flow.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the drawing, there is a conical portion 1 having a small diameter on the lower side and a large diameter on the upper side, a suction port 2 is provided on the small diameter side, and a discharge port 3 is provided substantially tangentially on the large diameter side, and a casing 4 is provided. And a lid 5 for covering the upper opening of the casing 4 is provided, a pump body 6 is formed by the casing 4 and the lid 5, and a motor 8 is arranged on a mount 7 to which the pump body 6 is attached. The drive shaft 9 of 8 penetrates through the lid 5, and the drive shaft 9 is provided in the pump body 6 and has a plurality of blade plates 10 so as to suck the liquid from the suction port 2 and discharge the liquid from the discharge port 3. The blade 11 is provided.

The vane plate 10 of the rotary vane 11 is curved in the rotational direction, and the curved convex portion 12 side of the vane plate 10 is rotated leftward in the drawing so as to rotate toward the side opposite to the ejection port.

In order to know the characteristics of the product of the present invention configured as described above, the results of performance measurement of the conventional product and the product of the present invention with respect to power consumption, noise, maximum head, flow rate, etc. are shown in Table 1. The performance comparison could be obtained.

[0020]

[Table 1]

When comparing the conventional product and the product of the present invention with Table 1, it was found that the performance was improved in comparison with the conventional product in terms of noise, maximum head and flow rate. Alternatively, it is possible to reduce the size of the motor 7 while maintaining the same performance, and as a result, it is possible to improve efficiency and reduce power consumption.

As described above, according to the liquid drainage pump of the first embodiment of the present invention, the discharge port 3 is provided in the tangential direction of the pump body, and the vane plate 10 of the rotary vane 11 is curved in the rotational direction, so that the vane plate 10 is formed. Since the curved convex portion 12 side is formed so as to rotate toward the side opposite to the discharge port side, it is possible to reduce noise when scooping up the liquid, improve the lift and flow rate, and reduce power consumption while maintaining a predetermined value.

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the blade plate 10a provided on the rotary blade 11a is configured to rotate counterclockwise so that the curved concave portion 13 side rotates toward the counter discharge side.

The second embodiment of the present invention constructed as described above was compared with the conventional product in the same manner as the first embodiment, and the performance was measured. As a result, the performance is slightly lower than that of the first embodiment. It was found that the performance was improved compared to the conventional product.

As described above, according to the liquid drainage pump of the second embodiment of the present invention, the blade plate 1 provided on the rotary blade 11a.
Since the vane plate 10a is formed so as to rotate counterclockwise in the drawing so that the curved concave portion 13 side of 0a rotates toward the counter discharge side, noise reduction and lift of the liquid at the time of scraping liquid as compared with the conventional product, The flow rate can be improved and the power consumption can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the blade plate 10b provided on the rotary blade 11b has a flat plate shape without a curve,
In the figure, it is configured to rotate counterclockwise so as to rotate toward the non-ejection side.

As a result of measuring the performance of the third embodiment of the present invention configured as described above as compared with the conventional product as in the first embodiment, the performance is slightly lower than that of the first embodiment. It was found that the performance was improved compared to the conventional product.

As described above, according to the liquid drainage pump of the third embodiment of the present invention, the blade plate 1 provided on the rotary blade 11b is provided.
In 0b, the vane plate 10b is formed so as to rotate counterclockwise in the figure so that a flat plate without curvature rotates toward the opposite ejection side. The flow rate can be improved and the power consumption can be reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the construction of the first embodiment is such that the area of the discharge port provided in the pump body is smaller than the area of the suction port.

With the above structure, when the rotary blade 11 is stopped,
The liquid tries to flow back from the discharge port to the suction port 2, but the area A of the discharge port 3 is smaller than the area B of the suction port 2, so the backflow is reduced as compared with the case where the area of the discharge port 3 is larger than the area of the suction port 2. However, it is possible to reduce the falling sound when the liquid returns from the suction port 2 to the liquid surface 16.

As described above, according to the liquid drainage pump of the fourth embodiment of the present invention, it is possible to reduce the dropping sound of the liquid when the liquid flows backward.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, in the structure of the first embodiment, the suction side end surface of the suction port provided in the pump body is formed in a bell mouth shape or a conical shape.

With the above structure, when the rotary blade 11 is stopped,
Although the liquid tries to flow backward from the discharge port 3 to the suction port 2, since the end face shape of the suction port 2 is formed into a bell mouth shape or a conical shape, the liquid flows backward and the liquid surface 16 flows from the suction port 2.
When falling, the liquid drops while spreading along the inner surface of the suction port 2, so that the falling flow velocity is reduced and the falling sound at the liquid surface 16 is reduced.

As described above, according to the liquid drainage pump of the fifth embodiment of the present invention, it is possible to reduce the dropping sound of the liquid when the liquid flows backward.

Next, a sixth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the drawing, in the structure of the first embodiment, a main plate 14 having a concave central portion is attached to the rotary blade 11c of the pump.

With the above structure, when the rotary vane 11c is stopped, the liquid tries to flow back from the discharge port to the suction port, but the rotary vane 11c of the pump has the concave main plate 14 attached at the center thereof. When the liquid flows back and drops from the suction port to the liquid surface 16, the main plate 14 buffers the liquid to reduce the flow velocity to the suction port, and the drop sound at the liquid surface 16 is reduced.

As described above, according to the liquid drainage pump of the sixth embodiment of the present invention, it is possible to reduce the dropping noise of the liquid when the liquid flows backward.

Next, a reference example relating to the present invention is shown in FIG.
A description will be given with reference to 0. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the drawing, the end face 15 other than the conical portion of the rotary blade 11d of the pump is formed into a spherical shape or a substantially hemispherical shape in the configuration of the first embodiment.

With the above construction, when the rotary blade 11d is stopped, the liquid tries to flow back from the discharge port 3 to the suction port 2, but the end surface 15 of the rotary blade 11d of the pump other than the conical portion is formed into a spherical shape or a substantially hemispherical shape. Therefore, when the liquid flows back and drops from the suction port 2 to the liquid surface 16, the inflow impact is softened at the end face 15 and the flow velocity of the liquid dropping to the suction port 2 is reduced, and the dropping sound at the liquid surface 16 is reduced.

As described above, according to the liquid drainage pump of the reference example relating to the present invention, it is possible to reduce the dropping noise of the liquid when the liquid flows backward.

[0047]

As is apparent from the above embodiments, according to the present invention, the noise reduction and the lift when the liquid is raked up,
The power consumption can be reduced while maintaining the flow rate. Further, it is possible to reduce noise due to backflow when the pump is stopped.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a liquid drainage pump according to a first embodiment of the present invention.

FIG. 2 is a front view showing a configuration of rotary vanes of the liquid drainage pump.

FIG. 3 is a front view showing a configuration of rotary vanes of the liquid drainage pump.

FIG. 4 is a perspective view showing a configuration of rotary vanes of the liquid drainage pump.

FIG. 5 is a front view showing the configuration of rotary blades of a liquid drainage pump according to a second embodiment of the present invention.

FIG. 6 is a front view showing a configuration of rotary vanes of a liquid drainage pump according to a third embodiment of the present invention.

FIG. 7 is a side sectional view of a liquid drainage pump according to a fourth embodiment of the present invention.

FIG. 8 is a side sectional view of a liquid drainage pump according to a fifth embodiment of the present invention.

FIG. 9 is a side sectional view of a liquid drainage pump according to a sixth embodiment of the present invention.

FIG. 10 is a perspective view showing a configuration of rotary vanes of a liquid drainage pump according to a reference example of the present invention.

FIG. 11 is a sectional view showing the structure of a conventional liquid drainage pump.

FIG. 12 is a bottom view showing the configuration of the liquid drainage pump.

FIG. 13 is a perspective view showing a configuration of rotary vanes of the liquid drainage pump.

FIG. 14 is a bottom view showing a configuration of rotary vanes of the liquid drainage pump.

[Explanation of symbols]

1 cone 2 Suction port 3 outlets 4 casing 5 lid 6 Pump body 7 mounting base 8 motor 9 drive shaft 10 blades 10a blade 10b blade 10c blade 10d blade 11 rotating blades 11a rotary blade 11b rotating blade 11c rotary blade 11d rotating blade 12 curved protrusion 13 curved recess 14 Main plate 15 End face 16 Fluid surface A discharge area B suction area 101 curved surface 102 Suction port 103 outlet 104 pump body 105 cover 106 drive motor 107 rotary drive shaft 108 rotating blades 109 blade

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-9-329100 (JP, A) JP-A-54-64702 (JP, A) JP-A-8-144996 (JP, A) JP-A-56- 129797 (JP, A) Actual development Sho 56-74896 (JP, U) Actual development 6-83992 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04D 29/24 F04D 1 / 14 F04D 29/44 F04D 29/22

Claims (5)

(57) [Claims] 1. A pump body having a conical portion having a small diameter on the lower side and a large diameter on the upper side, a suction port being provided on the small diameter side, and a discharge port being provided substantially tangentially on the large diameter side, and a pump body. And a rotary blade having a plurality of blade plates provided in the pump body so as to suck up the liquid from the suction port and discharge the liquid from the discharge port, and a motor for driving the rotary blade. Curved to the plate and this rotary blade,
It is configured such that the curved convex side of the vane plate rotates toward the side opposite to the discharge port side , and the central portion of the rotary vane is concave.
A liquid drainage pump characterized by having a plate attached . 2. The liquid drainage pump according to claim 1, wherein the vane plate is configured such that the curved concave side of the vane plate rotates toward the counter discharge port side. 3. The liquid drainage pump according to claim 1, wherein the vane plate is configured such that the non-curved radial vane plate rotates toward the side opposite to the discharge port. 4. The liquid drainage pump according to claim 1, 2 or 3, wherein the area of the discharge port provided in the pump body is smaller than the area of the suction port. 5. The liquid drainage pump according to claim 1, wherein the suction side end surface of the suction port provided in the pump body is formed into a bell mouth shape or a conical shape.