JPH0729277Y2 - Circulation pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a self-priming circulation pump used in a forced reheating system of a bath or the like.

(Prior Art) A forced reheating system for a bath is a system for circulating hot water in a bath 1 by a pump 3'between a bath 1 and a heat exchanger 2 of a water heater, as shown in FIG. However, in this system, the flowing water detecting means 4 is indispensable in order to prevent the boiling of the water heater. Conventionally, the flowing water detecting means 4 is configured as an independent device, and the flowing water detecting means 4 is connected to the system by piping work. Installed by connecting to piping.

An example of such a water flow detecting means 4 is, for example, kaikai 59-967
As disclosed in Japanese Patent No. 29, an actuating member that constitutes a switching means that operates by running water is installed in the body of the pipe joint.

(Problems to be solved by the invention) In the running water detection means 4 which is independently installed as described above, it takes a lot of man-hours for installation work such as piping work. The configuration becomes large,
Therefore, there is a problem that the apparatus as a whole becomes large and the required installation space becomes large.

The present invention aims to solve such problems.

(Means for Solving the Problems) Means for solving the above problems will be described with reference to FIGS. 1 to 3 corresponding to the embodiment. The present invention provides a suction port 12 and a discharge port on the upper portion. In the flowing water path inside the pump casing 6 in which the impeller 5 is provided, an operating member 7 that rotates around the flowing water is provided near the suction port 12 on the upstream side of the impeller 5, The operating member 7 is provided with a return turning means 8, and switching means 9 for operating the pump casing 6 and the operating member 7 in pairs.
9'is provided.

(Operation) Then, in the pump 3 of the present invention, for example, as shown in FIG. 3, the discharge port 10 is connected to the pipe 11a to the heat exchanger 2 of the water heater, and the suction port 12 is connected from the bath 1 to the heat exchanger 2. The pipe 11b can be connected, and the pipe 11c can be connected between the heat exchanger 2 and the bath 1 to form a forced reheating system.

Then, when the pump 3 is operated and the hot water in the bathtub 1 is flowing to the heat exchanger 2 side through the pump 3, the operating member 7 moves against the running water, and FIG. ), The switching means 9 and 9 ′ are relatively moved to the operating position by the rotation.
9'provides an operating signal, i.e. a running water detection signal, which makes it possible to detect running water.

On the other hand, when the pump 3 is not operating, the self-priming type self-priming at the beginning of operation, or the pump 3 is operating, but the hot water in the bathtub 1 is empty, If hot water is not flowing to the heat exchanger 2 via the pump 3,
As shown in FIG. 1 (a), the actuating member 7 has a return turning means 8
Since it is rotated by and is held at the standby position and therefore the switching means 9 and 9'is relatively held at the non-operating position, no water flow detection signal is generated.

In the above operation, from the start of the operation of the pump 3 to the normal operation, the air and the water are mixed in the pump casing 6 and the mixture is discharged from the discharge port 10 side. If the member 7 is provided, this operating member 7
Causes a chattering phenomenon in which the switching means 9 and 9 ′ repeatedly turn on and off due to frequent oscillations.

However, in the present invention, since the operating member 7 is provided on the suction port 12 side, it is not affected by the above-mentioned discharge of the mixture of air and water.

Further, in the present invention, since the suction port 12 and the discharge port 10 are provided in the upper part of the pump casing 6, the backflow of water from the discharge port 10 side to the suction port 12 side can be prevented without providing a check valve. It is possible to allow water to remain inside, and it is possible to prevent the occurrence of the chattering phenomenon due to the intermittent running water during the operation of the check valve.

Thus, by using the presence / absence of such a flowing water detection signal as one of the control conditions for the water heater, it is possible to reliably prevent the water heating. The circulation pump 3 of the present invention can be used not only for such an application but also for an appropriate pump system in which the presence or absence of a flowing water detection signal is one of the control conditions.

(Embodiment) In the embodiment of FIG. 1, the operating member 7 is provided in the pump casing 6 in the vicinity of the suction port 12, and the magnet 13 also serving as a weight is provided on the side opposite to the side where the running water hits. The operating member 7 is returned and rotated by the weight of the magnet 13. Reference numeral 14 is a stopper for forming the standby position. Further, in the pump casing 6, a reed switch 15 is provided above the operating member 7, and when the operating member 7 is rotated in the direction of running water, the magnet 13 is brought close to the reed switch 15 and the reed switch 15 is moved. 15 is turned on.

In the above construction, the magnet 13 serves as both the return turning means 8 and the switching means 9 ', but the return turning means 8 is independently constituted by a spring or the like.
The specific configuration of 8, 9, 9'is appropriate.

(Effects of the Invention) As described above, the present invention is provided with the water flow detecting means inside the pump casing, and is integrally configured. Therefore, for example, as in the forced reheating mechanism of a bath, the presence or absence of the water flow detection signal is one of the control conditions. When the pump system is configured, the installation work is facilitated and the installation space can be reduced. Further, in the present invention, since the operating member as the switching means is provided in the vicinity of the suction port on the upstream side of the impeller, it is not affected by the discharge of the mixture of air and water on the discharge port side at the start of the operation, and this influence It is possible to prevent the occurrence of chattering phenomenon due to, and because the suction port and the discharge port are provided in the upper part of the casing, it is possible to prevent the reverse flow of water from the discharge port side to the suction port side without providing a check valve. Therefore, there is an effect that it is possible to prevent the occurrence of the chattering phenomenon caused by the intermittent running water when the check valve operates. Therefore, according to the present invention, it is not necessary to incorporate an electric circuit for preventing chattering when it is used in a system that requires reliable water flow detection. And in the present invention, the structure of the water flow detecting means is simple and easy to assemble,
Moreover, since the installation space is small, there is an effect that the pump body is not upsized.

[Brief description of drawings]

FIG. 1 (a) is a partial sectional side view of the pump of the present invention,
FIG. 1 (b) is a cross-sectional explanatory view of a main part during a water flow detecting operation, FIG. 2 is a partial cross-sectional front explanatory view in the state of FIG. 1 (a), FIG. 3 and FIG. FIG. 3 is an explanatory view of a forced heating system for a bath, which is composed of the pump of the present invention and a conventional pump. Reference numeral 1 ... tub, 2 ... heat exchanger, 3,3 '... pump,
4, 4 '... flowing water detecting means, 5 ... impeller, 6 ... pump casing, 7 ... operating member, 8 ... return turning means, 9,
9 '... Switching means, 10 ... Discharge port, 11a, 11b, 11c
…… Piping, 12 …… Suction port, 13 …… Magnet, 14 …… Stopper, 15 …… Reed switch.

Front page continuation (72) Inventor Masaki Koyama 201 Nishi-Kashiwabara Nitta, Fuji City, Shizuoka Prefecture Takagi Industrial Co., Ltd. (56) References JP-A-48-41305 (JP, A) JP-A-50-37003 ( JP, A) JP 62-70680 (JP, A) Actually opened 58-42393 (JP, U) Actually opened 60-180796 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. In a running water path in a pump casing having a suction port and a discharge port provided in an upper part and having an impeller installed therein, the swirling member swivels in the vicinity of a suction port upstream of the impeller. A circulating pump, wherein the operating member is provided with return rotating means, and the pump casing and the operating member are provided with switching means that operate in pairs.