JPH0355444A - Drain pump - Google Patents

Abstract

PURPOSE:To prevent the pulsation of delivery flow rate for dimisnishing vibration and noise by a method wherein a conical rotary vane is mounted free to rotate on an axis and protrusions are formed on the surface of the rotary vane. CONSTITUTION:A rotary shaft 10a on the base of a conical rotary vane 10 is fitted in a base plate 1 so that the rotary vane is free to rotate in a pump main body 2, and two or more protruding and recessed parts are formed on the outer surface of the conical rotary vane 10 in the axial direction. The rotary shaft 10a of the conical rotary vane 10 is mounted on a driving shaft 6a of a pump motor 6 installed on the base plate 1. When the conical rotary vane 10 makes a turn, the drain to be discharged outside from a discharge port 4 receives the delivery pressure eight times since the conical rotary vane 10 has eight protrusions 11, so that the drain is discharged with a pulsation of the delivery flow rate diminished to about one-fourth. Therefore, vibration and noise during operation is remarkably reduced and a quiet operation can be achieved.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a drain pump (drain water treatment system) that drains drain generated in a condenser to the outside of the air conditioner during operation ψ of the air conditioner. pump).

(Prior Art) This type of drain pump that has already been proposed is configured as shown in FIGS. 5 and 6.

That is, in FIGS. 5 and 6, a suction port 3 is stepped at the lower part 2a of a truncated conical pump body (pump case body) 2 that is integral with the base 1. A drain outlet 4 is provided horizontally in the upper part 2b of the main body 2. Further, a rotary shaft 5a at the base of a p1 root wheel 5, which is flat and approximately triangular in shape, is rotatably fitted in the substrate 1. The drive shaft 6a of the pump motor 6 installed in the pump motor 6 is mounted on the drive shaft 6a.

Therefore, the above-mentioned drain pump has the above-mentioned pump motor 6.
By driving the pump body 2, the co-rotating shaft 5a of the flat, substantially triangular impeller 5 in the pump body 2 rotates, so that after the drain is sucked into the pump body 2 from the suction port 3, Water is discharged from the discharge port 4 to the outside of the machine.

On the other hand, when the substantially triangular impeller 5a rotates once,
The drain discharged from the discharge port 4 to the outside of the machine is subjected to two discharge pressures, and is discharged with a pulsating amount of discharged water.

(Problem to be solved by the invention) However, the above-mentioned drain pump
Every time a rotates, the drain discharged from the discharge port 4 to the outside of the machine is subjected to two discharge pressures, and the discharge water is discharged in a pulsating manner, which makes it quiet. In order to suppress resonance phenomena such as vibration and noise in air conditioners that are required to operate smoothly, it is necessary to insert vibration absorbing material into the member where the drain pump is installed or to maintain it in a floating state. This increases the number of component parts, making it difficult to provide at a low price.

The present invention has been made in view of the above-mentioned circumstances, and reduces vibration and noise by preventing the amount of discharged water from pulsating during operation, and also by interposing a vibration absorbing material and maintaining the water in a floating state. To provide a drain pump which can be adopted in an air conditioner which is required to operate quietly without any problems.

[Structure of the Invention] (Means for Solving the Problems and Their Effects) The present invention provides a suction port at the bottom of a truncated conical pump body, a discharge port at one side of the top of the pump body, A conical rotor body is rotatably mounted inside the pump body, and an uneven portion is formed on the outer peripheral surface of the conical rotor body to prevent vibration and noise from pulsating in the amount of discharged water during operation. It is designed to operate quietly without interposing any vibration absorbing material or maintaining it in a floating state.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

It should be noted that the present invention will be described with the same reference numerals attached to the same components as in the specific example described above.

In FIGS. 1 and 2, reference numeral 1 denotes a 111-shaped board, and a lower part 2a of a truncated cone-shaped pump body (pump case body) 2 is integrally formed with this board 1. A suction port 3 is provided, and a drain outlet 4 is provided horizontally in the upper part 2b of the pump body 2. Further, a rotating shaft 10a at the base of a conical rotor body 10 is fitted in the base plate 1 so as to be rotatable within the pump body 2, and the outer circumferential surface of the conical rotor body 10 has an order (
(eight in the figure) uneven portions 11 are formed in the axial direction, and the rotating shaft 10a of the conical rotor body 10 is mounted on the drive shaft 6a of the pump motor 6 installed on the substrate 1. has been done.

Therefore, when the pump motor 6 is driven, the rotating shaft 10 of the conical rotor body 10 in the pump main body 2
Since the parts a rotate together, drain is sucked into the pump main body 2 through the suction port 3 and then drained out of the pump through the discharge port 4.

On the other hand, when the conical rotary body 10 rotates once, the drain discharged out of the machine from the discharge port 4 is discharged eight times because the conical rotary body 10 is formed of eight uneven parts 11. Pressure is applied and the width of the pulsation of the amount of discharged water is reduced to about 1/4 of that in the above-mentioned specific example, so that vibration and noise during operation are significantly reduced, allowing for quiet operation.

Next, another embodiment of the present invention shown in FIGS. 3 and 4 is one in which a large number of four parts 12 are formed on the outer periphery of the conical rotor body 10, and When the conical rotor body 10 rotates four times, the drain is sucked up by the centrifugal force and frictional resistance of the conical rotor body 10 and drained out of the machine from the discharge port 4.

〔Effect of the invention〕

As described above, according to the present invention, the suction port is provided at the lower part of the truncated conical pump main body, the discharge port is provided at one side of the upper part of the pump main body, and the conical rotor blade is installed in the pump main body. is mounted on the rotor 7, and the conical rotor body has an uneven surface on its outer circumferential surface, which reduces the pulsation of the discharged water volume during operation, reduces vibrations and noise, and provides a quiet operation. Not only can it be operated, but there is no need to insert a vibration absorbing material or maintain it in a floating state, so it can be provided at low cost with fewer components.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the drain pump of the present invention, and FIG. 2 is a sectional view of the drain pump of the present invention.
A cross-sectional view taken along the chain line A-A in Figure 1, Figures 3 and 4.
The figures show other embodiments of the present invention, FIG. 5 is a sectional view of a drain pump that has already been proposed, and FIG.
It is a cross-sectional view along the chain line CC in the figure. 1... Board, 2... Pump body, 3... Suction port,
4...Discharge port, 6...Bump motor, 10...Conical rotor body, 11...Irregular portion.

Claims (1)

[Claims] A suction port is provided at the bottom of a truncated conical pump body, a discharge port is provided at one side of the top of the pump body, a conical rotor body is rotatably mounted in the pump body, and the conical rotor blade A drain pump characterized by having an uneven portion formed on the outer peripheral surface of the body.