JPH0563638B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a self-priming pump used in forced reheating systems for baths and the like.

(Prior art and its problems) A forced reheating system for a bath, for example, as shown in FIG. In this system, the pump 3' is a self-priming pump so that the circulation of hot water can be automatically restarted when restarting the operation after the operation is stopped. Self-priming pumps include those that have a self-priming return flow channel with an air-water separation section from the discharge port side to the suction port side of the pump, and those that have a 1985 Utility Model Registration Application No. 203734.
As disclosed in the specification and drawings attached to the application, there are some configurations in which a priming port is added to a whirlpool chamber equipped with an impeller, but in all of these, after starting, a predetermined amount of water is There is a time delay before the hot water circulates. Therefore, if the water heater is operated at the same time as the pump is started, there is a risk of dry heating, and in order to prevent this, a flowing water detection means 4 for controlling the operation of the water heater is essential. Conventionally, such flowing water detection means 4 has been installed as an independent device in the system, which has caused problems in terms of installation work, installation space, and the like.

The present invention aims to solve such problems.

(Means for solving the problems) The configuration of the present invention is shown in FIGS. 1 to 6 corresponding to embodiments.
To explain based on the drawings, the present invention has a suction port 7 and a discharge port 12 in the upper part of the self-priming pump 3. An operating member 9 that rotates in flowing water is installed on the suction port 7 side upstream of the inlet 8 of the passage, and the operating member 9 is provided with return rotation means 10 and is connected to the casing 6. Actuation member 9
Switching units 11 and 11' operate in pairs.
This means that a means has been established.

(Function) As shown in FIG. 6, for example, the pump 3 of the present invention connects the arrangement 13a of the discharge port 12 to the heat exchanger 2 of the water heater, and connects the arrangement 13a of the water heater to the heat exchanger 2 of the suction port 7. A forced reheating system can be configured by connecting the piping 13b and further connecting the piping 13c between the heat exchanger 2 and the bathtub 1.

Therefore, when the pump 3 is operating and the hot water in the bathtub 1 is flowing through the pump 3 to the heat exchanger 2 side, the operating member 9 is swamped by the running water and is in the fourth position.
The switching means 11, 11' are rotated as shown in the figure, and this rotation brings the switching means 11, 11' into the operating position relative to each other. can be detected. Also, when the pump 3 is not operating or when the pump 3 is operating but the hot water in the bathtub 1 is empty, hot water is not flowing from the bathtub 1 to the heat exchanger 2 via the pump 3. As shown in FIG. 3, the actuating member 9 is rotated by the return rotation means 10 and held in the standby position, so that the switching means 11,
11' is held in a relatively inactive position so that no running water detection signal is generated.

Therefore, when the pump 3 is restarted after being stopped, or when it is started for the first time after installation, water that has passed through the self-priming flow channel flows into the casing 6 from the inlet 8 and generates self-priming force. In this way, the hot water in the bathtub 1 gradually reaches the suction port 7 through the pipe 13b, and the pump 3 starts circulating the hot water. At this time, since the actuating member 9 is provided upstream of the inlet 8, it is not activated by the water flowing into the casing 6 from the inlet 8, but is swamped only by the hot water from the inlet 7 and is in the operating state. Therefore, until the normal circulation of hot water by the pump 3 starts, the switching means 11,
11' does not generate a flowing water detection signal.

Further, in the present invention, since the suction port 7 and the discharge port 12 are provided at the upper part of the casing 6, it is possible to prevent water from flowing backward from the discharge port 12 side to the suction port 7 side without providing a check valve. It is also possible to prevent the chattering phenomenon caused by the continuation of flow when the check valve is operated.

In this way, the presence or absence of the flowing water detection signal accurately reflects whether or not the prescribed hot water circulation is being performed, so by using the presence or absence of this signal as one of the control conditions for the water heater, it is possible to prevent dry heating. It can be prevented. In addition, it goes without saying that the pump 3 of the present invention can be applied to any appropriate pump system in which the presence or absence of such a signal is one of the control conditions.

(Embodiment) To explain the illustrated embodiment, first, in this embodiment, the actuating member 9 is rotatably supported by a support frame 14 separate from the casing 6, and the support frame 14 is supported by the support frame 14, which is separate from the casing 6. It is constructed so that it can be attached and detached at a predetermined location. At this time, the support frame 14 and the casing 6
Appropriate uneven portions 15 are formed at predetermined locations of the device to engage when the device is installed to prevent backlash and the like. In this configuration, by attaching the support frame 14 to a predetermined location on the casing, the actuating member 9 can be installed at a predetermined location on the casing 6, and by removing it as necessary, it can be used as a normal self-priming type. Can be used as a pump.

Next, the actuating member 9 has a magnet 16 that also serves as a weight provided on the side opposite to the side a that is exposed to the flowing water, and the actuating member 9 is rotated back by the weight of this magnet 16. The support frame 14 is provided with a stopper portion 17 for configuring the standby position. On the other hand, in the casing 6, a reed switch 18 is provided above the actuating member 9, and when the actuating member 9 rotates under running water, the magnet 16 is brought close to the reed switch 18, and the reed switch 18 is activated. of
This is set to ON, and this is used as a running water detection signal.

In the above configuration, the magnet 16 also serves as the return rotation means 10, but the return rotation means 1
The specific structure of these means 10, 11, 11' is arbitrary, such as configuring 0 independently with a spring or the like. Further, the actuating member 9 is configured to be detachably attached to a predetermined location of the casing 6 by the above-described structure, etc.
It can also be fixed. In addition, the operating member 9
When the pump 3 of the present invention is used as a component of a forced reheating system as described above, it can be made of synthetic resin or the like to prevent hair, dirt, etc. from getting caught. Furthermore, as described above, the self-priming mechanism of the self-priming pump to which the present invention is applied is appropriate.

(Effects of the Invention) As described above, the present invention is configured such that the water flow detection means is provided in the flow channel in the pump casing and is integrally configured. When configuring a pump system as one of the above, the installation work is easy and the installation space can be reduced.

In addition, in the present invention, the actuating member as the switching means is provided at a position where it is not affected by the discharge of the mixture of air and water on the discharge port side and the flowing water flowing through the self-priming flow channel, so that the actuating member as the switching means is not affected by these influences. It is possible to prevent the occurrence of chattering phenomenon due to

Furthermore, in the present invention, since the suction port and the discharge port are provided in the upper part of the casing, it is possible to prevent water from flowing backward from the discharge port side to the suction port side without providing a check valve. This has the effect of preventing the chattering phenomenon caused by the continuation of water flow when the valve is operated.

[Brief explanation of the drawing]

Figures 1 to 5 correspond to embodiments of the present invention, and Figures 1a and 1b are perspective views illustrating the overall appearance;
Figure 2 is an explanatory sectional view taken along the line A-A in Figure 1, Figures 3 a and b are enlarged sectional views of main parts, b is an explanatory sectional view taken along the line B-B of a, and Figure 4 is a running water detection FIG. 3A is an explanatory sectional view taken along the line B-B in FIG. 3A showing the operation, FIG.
FIG. 7 is an explanatory diagram of a forced reheating system for a bath consisting of the pump of the present invention and a conventional pump, respectively. Code, 1... Bathtub, 2... Heat exchanger, 3, 3'
... pump, 4 ... flowing water detection means, 5 ... impeller, 6 ... casing, 7 ... suction port, 8 ... inflow port, 9 ... operating member, 10 ... return rotation means,
11, 11'...Switching means, 12...Discharge port, 13a, 13b, 13c...Piping, 14...
...Support frame, 15...Irregular portion, 16...Magnet, 17
...Stopper section, 18...Reed switch.

Claims (1)

[Scope of Claims] 1. In the casing of a self-priming pump which has a suction port and a discharge port in the upper part and an impeller installed inside, the suction port is located upstream of the inlet of the self-priming flow channel. An operating member that rotates in flowing water is provided on the mouth side, and the operating member is provided with return rotation means, and the casing and the operating member are provided with switching means that operate as a pair. A self-priming pump featuring 2. The actuating member is rotatably supported by a support frame separate from the casing, and the support frame is configured to be detachable at a predetermined location on the casing, and by attaching the support frame to the casing, the actuating member can be moved. The self-priming pump according to claim 1, wherein the self-priming pump is attached to a predetermined location of the casing.