JPH01178791A - Drainage pump - Google Patents

Abstract

PURPOSE:To make the vane of the pump in the caption smoothly discharge drain by connecting a discharge nozzle parallel to the center line in radial direction, to a discharge port which is displaced from the center line in radial direction onto the upper side in the rotation direction of the vane. CONSTITUTION:A lower-side casing 14 is furnished with an inlet port 11 for water suction on its lower side, and a discharge port 13 connected to a discharge nozzle 12 on its upper side, so that its internal area is increased from the inlet port 11 to the upper side having the discharge port 13. The lower-side casing 14 and an upper-side casing 15 which covers the lower-side casing, are integrated to form a one-body casing. The discharge port 13 is provided on the upper side in the rotation direction of a vane 1b by displacing it at a proper distance from the center line 24 of the casing 14 in radial direction perpendicular to the rotary shaft 23. The discharge nozzle 12 is provided parallel to the center line 24 in the radial direction, so as to be connected to the discharge port 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drain water treatment pump for treating drain water generated during cooling operation in a heat pump type air conditioner or the like.

2. Description of the Related Art An example of a conventional drain water treatment pump will be described with reference to the drawings.

FIG. 3 is a longitudinal cross-sectional view of a conventional drain water treatment pump, and FIG. 4 is a cross-sectional view taken along line AA'.

In FIG. 3, when the motor 1 rotates, the blades 2 rotate and suck drain water through the suction port 4 of the lower casing 3. This drain water rises upward along the inner surface of the lower casing 3, which has an increased inner surface area, and is discharged from the outlet 5 through the outlet nozzle 6. This blade 2 is connected to the lower casing 3 from the lower suction port 4 toward the upper air outlet 5.
This is a so-called centrifugal drain water treatment pump that increases the radial length along the inner surface of the pump to raise the drain water from the inlet 4 to the outlet 5 and to apply dynamic pressure to the drain water. . Further, as shown in FIG. 4, the shape of the blade @2 is curved in an arc toward the upper side in the rotational direction on both sides of the rotational shaft 7, and has an S-shape as a whole, and the air outlet 5 is The blowing nozzle 6 is located below the rotating shaft 7 and is located on a radial center line 8 perpendicular to the rotating shaft 7 .

Problems to be Solved by the Invention In such a drain water treatment pump, the blowout nozzle 6 is located at the radial center 1, which is orthogonal to the rotation axis 7 of the casing 3. ila
Because it is located above, it is difficult to discharge the drain water sent by the blade 2 by centrifugal force.

For this reason, vibration occurs when drain water is discharged by the blades 2. This vibration increases the number of rotations of the motor to n(r, p, n)
Then, it constitutes a part of vibration having a first-order component in a low frequency range of 2 n /60 (tlZ). In other words, the vibrations generated when the blade 2 hits the drain water and transports and discharges the drain water are in a low frequency range, so the amplitude of the generated vibrations is large, and the vibrations are transmitted to the indoor unit in which the drain water treatment pump is installed. This has the problem of causing large vibrations to other parts of the indoor unit and producing large noises.

The present invention solves the above two conventional problems, and aims to provide a drain water treatment pump that can lower vibrations when sucking and discharging drain water on a water tray of an indoor unit. That is.

Means for Solving the Problems In order to solve the above-mentioned problems, the drain water treatment pump of the present invention has a water inlet at the lower part and an outlet communicating with the outlet nozzle at the upper part. A casing whose inner surface area increases from the inlet to an upper side where the air outlet is located; and a casing whose inner surface area increases from the inlet to the upper area where the air outlet is located, and the casing has a radial length on both sides of the rotating shaft. blades extending along the inner surface of the casing while maintaining an appropriate distance from the inner surface of the casing, curved in an arc toward the upper side in the rotational direction on both sides of the rotating shaft, and having an S-shape as a whole; An air outlet is provided disposed upward in the rotational direction of the blade from a radial center line perpendicular to the rotational axis of the casing, and an air outlet nozzle communicating with the air outlet is provided parallel to the radial center line. It is something that

Effect With the above configuration, a blowout nozzle parallel to the radial centerline is provided in communication with the blowout port which is displaced upward in the rotational direction of the blade from the radial centerline perpendicular to the rotational axis of the casing, and the Since the drain water is discharged, the action of the vanes to send and discharge the drain water to the blow-off port and the blow-out nozzle becomes smooth, and the vibration of the drain water treatment pump is reduced. Therefore, the indoor unit incorporating this drain water treatment pump will not vibrate greatly or generate large noises.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a drain water treatment pump showing an embodiment of the present invention, and FIG. 2 is a sectional view thereof taken along the line [3-8'. In FIGS. 1 and 2, the lower part has an inlet 11 for sucking water, the upper part has an outlet 13 communicating with the outlet nozzle 12, and the outlet 13 is directed upward from the inlet 11. A lower casing 14 configured to have an increased inner surface area and an upper casing 15 covering the lower casing 14 form an integrated casing. The blades 16 extend from the lower suction port 11 toward the upper blowout port 13 while maintaining a radial length on both sides of the rotating shaft 23 at an appropriate distance from the inner surface of the lower casing 14 and along the inner surface thereof. It is gradually increasing. The air outlet 13 is provided with an appropriate diameter near the maximum radial length of the blade 16. The motor 17 is
Supported by a motor support plate 18, the lower casing 1
4, the flange of the upper casing 15, and the motor support plate 18 are collinear with each other by a port 19. The drain plate 20 serves to drain water leaking from inside the casing, and drains water from both the water return port 21 provided in the upper casing 15 and the water return port 22 provided in the motor support plate 18. It will be returned. The blade 16 has an inverted triangular cross-sectional shape, and is curved in an arc toward the upper side in the rotation direction on both sides of the rotation shaft 23. Further, the air outlet 13 is connected to a rotating shaft 23 of the lower casing 14 shown in FIG.
The blowout nozzle 12 is provided at a position displaced an appropriate distance upward in the rotational direction of the blade 16 from a radial centerline 24 perpendicular to It's communicating.

The operation will be explained using the above configuration. When the motor 17 rotates, the blades 16 rotate, sucking in drain water from the suction port 11 of the lower casing 14, sending the water to the upper part, and discharging it through the blow-off nozzle 12 from the blow-off port 13 as the blade 16 rotates. In this way, the vanes 16 are attached to the lower casing 14.
By increasing the length in the radial direction along the inner surface of the drain water, the drain water is smoothly flowed from the inlet 11 to the outlet 13, and is discharged by applying dynamic pressure to the drain water. It constitutes a type drain water treatment pump.

In this way, as shown in FIG. 2, the air outlet 13 and the air outlet nozzle 12 are located at a position displaced an appropriate distance upward in the rotational direction of the blade 16 from a certain radial center line 24, and Since the blades 16 are provided parallel to the line 24, the action of the blades 16 to send and discharge drain water to the outlet 13 and the blow-off nozzle 12 becomes smooth, and vibration of the drain water treatment pump can be reduced. Therefore, the vibrations transmitted to the indoor unit in which the drain water treatment pump is incorporated are small, and other parts of the indoor unit are not caused to vibrate greatly or large noises are not generated.

Effects of the Invention As described above, according to the present invention, an air outlet parallel to the radial center line is provided at the air outlet which is displaced upward in the rotational direction of the blade from the radial center line perpendicular to the rotational axis of the casing. By providing the nozzles in communication with each other, the function of the vanes to send and discharge drain water to the blow-off port and the blow-off nozzle becomes smooth, and vibration of the drain water treatment pump can be reduced. Therefore, other parts of the indoor unit incorporating this drain water treatment pump are not caused to vibrate greatly or generate large noises.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a drain water treatment pump showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line B-B' in Fig. 1, and Fig. 3 is a longitudinal cross-section of a conventional drain water treatment pump. Figure 4 is the third
It is a sectional view taken along the line AA' in the figure. 11...Intake port, 12...Blowout nozzle, 13...
Air outlet, 14...Lower casing (casing), 1
6...Blade, 23...Rotating shaft, 24...Radial center line. Agent Yoshihiro Morimoto Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] 1. A casing having a water inlet at the lower part and an outlet communicating with the outlet nozzle at the upper part, the inner surface area increasing from the inlet to the upper part where the outlet is located, and the casing The radial length on both sides of the rotating shaft increases along the inner surface of the casing while maintaining an appropriate distance from the inner surface of the casing, from the inlet to the upper side where the air outlet is located. a blade that is curved in an arc shape toward the upper side in the rotation direction and has an S-shape as a whole, and is displaced toward the upper side in the rotation direction of the blade from a radial center line perpendicular to the rotation axis of the casing. A drain water treatment pump that is provided with a blow-off port and has a blow-off nozzle that communicates with the blow-off port and is parallel to the radial center line.