JP3794001B2 - Impeller pump - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an impeller pump used when hot water is supplied in a hot water supply apparatus or the like.
[0002]
[Prior art]
In a hot water supply apparatus such as a jar or a pot, an impeller pump used for supplying hot water is used by connecting a suction port of a pump to a container of a hot water supply apparatus, and has, for example, a configuration as shown in FIG. is there. In FIG. 3, 1 is a pump case, 2 is a partition plate that hermetically partitions the pump chamber 3 and the drive unit 4, 5 is a shaft supported by the partition plate 2, and 7 is rotatably provided with respect to the shaft 5. The impeller and magnet fixing member 8, 8 is an impeller that rotates integrally with the fixing member 7, and 9 is a driven magnet that rotates integrally with the fixing member 7. A drive magnet 10 is provided in the drive unit 4 and is rotated by the motor 11. Reference numeral 12 denotes a suction port, and 13 denotes a discharge port.
[0003]
Such a pump rotates the drive magnet 10 by driving the motor 11 and rotates the driven magnet 9 by magnetic coupling between the drive magnet 10 and the driven magnet 9, thereby rotating the impeller 8 and acting as a pump. By the action of this pump, hot water in the container connected to the suction port 12 is sucked, sucked from the suction port 12, discharged from the discharge port 13 and supplied.
[0004]
[Problems to be solved by the invention]
Bubbles are generated when hot water is supplied by such a pump. In particular, when the impeller 8 rotates, hot water near the boiling point is agitated, and this agitation further increases the temperature of the hot water, resulting in re-boiling and generation of bubbles, which are collected near the inlet 12. As a result, the suction port 12 is blocked and the hot water does not flow easily.
[0005]
An object of the present invention is to provide an impeller pump in which the hot water supply capacity does not decrease due to the generation of bubbles as described above.
[0006]
[Means for Solving the Problems]
The impeller pump of the present invention is a pump that supplies liquid by sucking from the suction port and discharging from the discharge port by rotation of the impeller provided rotatably in the pump chamber, and applies to some or all of the blades of the impeller. This is characterized in that a slit is provided, whereby the temperature rise due to the rotation of the impeller is suppressed to prevent generation of bubbles, thereby eliminating the decrease in hot water supply capacity.
[0007]
Embodiment
Next, an embodiment of the impeller pump of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a sectional view of an impeller pump of the present invention. In FIG. 1, 1 is a case, 2 is a partition plate that hermetically partitions the pump chamber 3 and the drive unit 4, 5 is a rotating shaft of the impeller, 7 is a fixing member, 20 is an impeller, 9 is a driven magnet, 10 is a drive magnet, and is rotated by a motor 11. With the rotation of the drive magnet 10, the magnet 9 is rotated by magnetic coupling, and the impeller 20 is rotated integrally therewith to perform a pumping action. That is, the impeller pump is formed by the above configuration. Such an impeller pump sucks liquid (hot water) in a container connected to the suction port 12 from the suction port 12, discharges it from the discharge port 13, and supplies it through a pipe.
[0009]
Unlike the conventional one, the impeller pump of the present invention has slits 22 formed in the blades 21 of the impeller 20 as shown in FIG. 1, thereby agitating the liquid when the impeller is rotated. Is decreasing. Therefore, the temperature rise of the liquid can be suppressed and boiling caused by the temperature rise can be avoided. Therefore, there is an effect of preventing the generation of bubbles, there is no decrease in hot water supply capacity, and a constant and good hot water supply capacity can always be maintained.
[0010]
FIG. 2 is a diagram showing a blade portion of the impeller pump of the present invention. In this example, every other blade 21 is provided with a slit 22, and no slit is formed in the remaining blades.
[0011]
As in this example, every other slit may be provided, or all the blades may be provided.
[0012]
If the number of blades provided with slits is large, the stirring action is greatly reduced, which is preferable for preventing the temperature rise, but the hot water supply action is reduced. Conversely, when the number of slits relative to the number of blades is small, the effect of reducing the stirring action is small and the stirring action is increased, and the action of suppressing the temperature rise is reduced.
[0013]
The stirring action by the slit also depends on the area of the slit. That is, if the area of the slit is increased, the stirring action is reduced, but the pump action is also weakened.
[0014]
As described above, the number of blades provided with slits, the area of the slits, and the like may be determined in consideration of the pump action and the stirring preventing effect. Further, when slits are provided in only some of the blades without providing slits in all the blades, it is desirable to distribute the provided blades and the non-provided blades in a balanced manner.
[0015]
【The invention's effect】
The impeller pump of the present invention is provided with slits in the blades to suppress the stirring of the liquid (hot water) due to the rotation of the blades, thereby reducing the temperature rise of the liquid and thereby preventing boiling. The generation of bubbles was also suppressed so that a constant hot water supply capacity could be maintained.
[Brief description of the drawings]
FIG. 1 is a sectional view of an impeller pump according to the present invention. FIG. 2 is a view showing a blade portion of the impeller pump according to the present invention. FIG. 3 is a sectional view of a conventional impeller pump.
5 Rotating shaft of impeller 20 Impeller 21 Blade 22 Slit

Claims (2)

In a pump for supplying hot water, particularly hot water , by sucking from the suction port and discharging from the discharge port by rotation of the impeller provided rotatably in the pump chamber, slits are provided in some or all blades of the impeller. Impeller pump characterized by that.     2. The impeller pump according to claim 1, wherein a slit is provided in every other blade of the impeller.

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