KR20070033869A - Drain pump - Google Patents

Abstract

assignment

The noise of the drain pump installed in the air conditioning system is reduced.

Resolution

The drain pump of this invention has the motor 10, the rotary blade 100a connected to the output shaft of a motor, and the pump housing 50a which accommodates a rotary blade. The rotary blade 100a has a shaft portion 110 connected to the output shaft of the motor, a plate-shaped large diameter wing 120 extending radially from the shaft portion, and a plate-shaped small diameter wing connected through a large diameter wing and a tap-shaped connection part. 140, the ring member 150 which connects the outer peripheral part of a large diameter wing | blade, and the hollow disk member 160a connected to the lower end part of a ring member. The rotary blade 100a has a groove between the inner circumferential portion of the ring member 150 and the outer circumferential portion of the large diameter blade 120.

Drainage Pump, Noise

Description

Drain pump {DRAIN PUMP}

1 is a cross-sectional view of a drain pump of a first embodiment of the present invention.

2 is an explanatory view showing various aspects of a groove shape formed between the tip of a large-diameter wing and the inner circumferential portion of a ring member.

3 is a graph showing the relationship between the noise and the head of the drain pump and the conventional drain pump of the present invention.

4 is a graph showing the relationship between the noise and the head of the drain pump and the conventional drain pump of the present invention.

(Explanation of symbols for the main parts of the drawing)

1,1A: drain pump 10: electric motor

50: pump housing 100: rotary wing

120: large diameter wing 140: small diameter wing

150 ring member 160 disk member

Technical field

The present invention relates to a drain pump equipped with an air conditioner.

Background technology

The indoor unit of the air conditioner is dripped in the drain pan provided below the heat exchanger by condensing moisture in the air during the cooling operation. A drain pump is used to drain the drain water accumulated in this drain pan. This drainage pump is provided with a suction port in the lower part, opens the upper part, and freely rotates the vane in the housing which is the pump main body which provided the discharge port in the lateral direction, and is fixed by the motor fixed to the upper part of the opening of the housing through the cover. This rotary wing is rotating. When the blade is rotated by driving the motor, the drain water stored in the drain pan is sucked from the lower end of the suction port, pumped by the centrifugal force along the inner surface of the housing, and discharged from the discharge port to the outside.

A drain pump of this kind is disclosed in, for example, Patent Documents 1 and 2 of the present applicant.

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-213770

Patent Document 2: Japanese Patent Application Laid-Open No. 2004-138075

As a result of various experiments, the inventor of the present application has obtained the knowledge that the presence and shape of the grooves in the connecting portion between the ring member of the rotary blade and the large-diameter blade, in particular, the connection portion, are related to the generation of noise.

The present invention is to provide a drain pump that can reduce driving noise based on the finding.

The drain pump of the present invention, as a basic means, has a motor, a rotary vane connected to the output shaft of the motor, and a pump housing for receiving the rotary vane, the pump housing having a suction port into which a small diameter vane of the rotary vane is inserted and a side of the pump chamber. It is provided with a discharge port provided in. The rotary blade includes a shaft portion connected to the output shaft of the motor, a plate-shaped large diameter blade extending in the radial direction from the shaft portion, a plate-shaped small diameter blade connected through the large diameter blade and the connecting portion, and a ring member connecting the outer peripheral portion of the large diameter blade; Has a hollow disk member connected to the lower end of the ring member,

A groove is provided between the inner circumferential portion of the ring member of the rotary blade and the outer circumferential portion of the large diameter blade, and the upper edge of the ring member is formed as a thin portion.

Also preferably, the upper corner portion of the outer circumferential portion of the large-diameter blade is formed by a chamfer portion, and the groove portion of the outer circumferential portion of the large-diameter blade is formed of a stepped portion or a curved portion.

To practice the invention  Best form for

1 shows a drain pump of a first embodiment to which the present invention is applied. The drain pump which shows the whole by the code | symbol 1A has the electric motor 10, and the electric motor 10 is fed through the cable 11. The electric motor 10 is attached to the support pillar 20 provided upright on the cover member 30 attached to the upper part of the pump housing 50a (pump main body).

The pump housing 50a is made of plastic and a pump chamber 52a is formed therein. In the pump housing 50a, the suction port 60 and the discharge port 70 communicated with the pump chamber 52a are integrally formed.

The rotary vane 100a is arrange | positioned in the pump chamber 52a, and the opening part of the pump chamber 52a is covered with the cover member 30. As shown in FIG. The seal member 40 is inserted between the pump housing 50a and the lid member 30, and leakage of drain water from the pump chamber is prevented.

The rotary vane 100a has a shaft portion 110, and the output shaft 12 of the electric motor 10 is inserted into the hole of the shaft portion 110. The plate-shaped large-diameter blade 120 extending in the radial direction from the shaft portion 110 is connected to the cylindrical ring member 150 on the outer circumferential side.

The lower edge part of the large diameter blade | wing 120 is connected to the disk member 160a. The disk member 160a has an opening 170 at its center side, and the drain water from the suction port is sent to the large-diameter blade 120 side through the small-diameter blade 140a and the connecting portion 130.

In this drainage pump 1A, the disk member 160a of the rotary vane 100a has an angle of β1 with respect to the horizontal plane, and an angle of α1 with respect to the horizontal plane of the bottom view corresponding to the disk member of the pump housing 50a. Have

In this embodiment, the angle of α1 is set to 15 degrees, and the angle of β1 is set to 15 degrees.

In addition, the small-diameter wing 140a is formed of four board members extending in the radial direction. The lower edge part of these four sheets may be formed in a chamfered shape.

FIG. 2: is explanatory drawing which shows the various state of the groove shape formed between the front-end | tip of the large diameter vane 120, and the inner peripheral part of the ring member 150. As shown in FIG.

The ring member 150 has a thin section 151 formed at the upper edge portion and a curved portion 152 formed at the inner circumferential portion as a basic cross-sectional shape. Then, the tip of the large blade 120 has a linear outer peripheral surface (120a), and has a ring groove 153.

The tip shape of the large-diameter wing 120 is the arc part 120b formed by the upper corner part, the step part 120c, the arc groove parts 120d and 120e, the chamfer part 120f of the upper corner part, the chamfer part, and the arc groove part. Various shapes such as the combination portion 120g, the combination portion 120h of the stepped portion and the upper corner portion, the combination portion 120i of the stepped portion and the chamfered portion, and the circular groove and the chamfered portion 120j can be adopted. have.

In addition, the height dimension of the thin part 151a of the ring member 150a is made lower than the height dimension of the large diameter wing 120, or conversely, the thin part 151b of the ring member 150b is made high, or a ring Various shapes can be adopted, such as omitting the thin portion of the upper edge of the member 150c to form the curved portion 151c inward.

In the above embodiment, it is also possible to further reduce the thickness by setting α1 = 5 ° and β1 = 5 °.

3 and 4 are graphs showing the relationship between the noise and the head of the drain pump of the present invention and the conventional drain pump, wherein the broken line shows the conventional one and the solid line shows the present invention.

In the case where the power supply is 50 Hz, FIG. 3 shows the relationship between the noise at the time of discharge and the head, and FIG. 4 shows the balance time (the state in which drainage is lifted at the outlet of the discharge pipe but not discharged).

In both cases, the noise is reduced in all the heads, and in particular, the effect of reducing the noise in the low heads is great. Since the noise from the drainage pump is reduced in a quiet environment such as when sleeping on the citron, the effect becomes even more noticeable.

The present invention can reduce the sound of water during the drainage pump operation by providing the above configuration.

Claims (4)

A pump having a motor, a rotary vane connected to an output shaft of the motor, and a pump housing accommodating the rotary vane, the pump housing having a suction port into which a small diameter vane of the rotary vane is inserted and a discharge port provided at a side of the pump chamber, The rotary blade includes a shaft portion connected to the output shaft of the motor, a plate-shaped large diameter blade extending in the radial direction from the shaft portion, a plate-shaped small diameter blade connected through the large diameter blade and the connecting portion, and a ring member connecting the outer peripheral portion of the large diameter blade; Has a hollow disk member connected to the lower end of the ring member, The said rotary blade is provided with the groove | channel between the inner peripheral part of a ring member, and the outer peripheral part of a large diameter blade | wing. The method of claim 1, The upper edge of the ring member is a drain pump, characterized in that formed in a thin portion. The method of claim 1, An upper corner portion of the outer circumference of the large-diameter wing is formed with a chamfer portion. The method of claim 1, The groove of the outer circumferential portion of the large-diameter wing is formed with a stepped portion or a curved portion.

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