JPH10205480A - Self-suction pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compact a self-suction type pump by integrally forming the pump, to reduce the generation of water pass noise during filling with hot water, and to shorten a hot water filling time. SOLUTION: A bath device having an additional burning circuit 1 to ciculatingly heat water in a bath tub 3 is provided with a self-sucking type pump 5 to circulate water in the bath tube 3; and a heat-exchanger 7 to heat circulation water. In the self-absorption type pump 5, a suction port 17 for circulating water is integrally formed at the upper part of the front of a suction chamber 20. Further, by connecting a hot water supply circuit 2 to the front of the water reservoir chamber 24 of the self-suction type pump 5, supply hot water is branched from the water reservoir chamber 24 during filling with hot water. One is poured to the bath tub 3 through a discharge passage 23 and a heat-exchanger 7 and the other to the bath tub 3 through an impeller chamber 13 and the suction port 17, and a deviation of a flow to the heat- exchanger 7 side is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-priming pump.
More specifically, the present invention relates to a self-priming pump provided in a reheating circuit of a bath apparatus and circulating bath water.

[0002]

2. Description of the Related Art Generally, a bath apparatus is provided with a reheating circuit 1 for circulating and heating water in a bathtub 3 as shown in FIG. The reheating circuit 1 is provided with a temperature sensor 4 for detecting a water temperature, a bathtub 3 a self-priming pump 5 for circulating water, and a heat exchanger 7 for heating circulating water. In addition, the self-priming pump 5 is provided with a suction port joint 52 connected to the flow path (the additional heating circuit 1) from the bathtub 3 on the suction port 51 side. Further, a hot water supply connector 53 is provided on the discharge port 55 side, and a hot water supply circuit 2 that fills the bath tub 3 from a hot water supply device (not shown) using the flow path of the additional heating circuit 1 is connected. In addition, a water flow detection unit 56 provided with a water flow switch for checking the flow of the circulating water is provided on the upper part and downstream of the flow path, and connected to the flow path 1 to the heat exchanger 7 on the downstream side. . At the lower part of the self-priming pump 50, a drain circuit 31 for draining residual water for preventing freezing is provided via a drain valve 32 electrically connected to the controller.

At the start of the first operation after draining water from the drain circuit 31, the inside of the self-priming pump 50 is replaced with air. Therefore, in order to prevent the self-priming pump 50 from idling,
At the start of the first operation, the self-priming pump 50
Injection is performed as priming water. Therefore, the connection position of the hot water supply circuit 2 in the additional heating circuit 1 is determined by the self-priming pump 50.
It is connected to the upper part of the self-priming pump 50 so that priming water can be stored therein. The position of the suction port 17 is
If there is an air pocket inside the self-priming pump 50, the self-priming performance is reduced. Therefore, a suction port joint 52 is provided at an upper position of the self-priming pump 50 so that air flowing in from the flow path can be used.
We do not stay inside.

[0004]

However, in the self-priming pump 50, the suction port joint 52 is provided on the suction side, and the hot water supply connector 53 and the water flow detection unit 56 provided with a water flow switch are provided on the discharge side. When these are incorporated, the self-priming pump 50 becomes large, and there has been a problem that the bath apparatus cannot be made compact. When filling the bathtub 3 from the hot water supply circuit 2, the self-priming pump 50 is used.
Is stopped, and the hot water from the hot water supply circuit 2 is branched in the upper and lower two directions in the hot water supply joint 53 to which the hot water from the hot water supply circuit 2 is connected. That is, one is a self-priming pump 50
Flows to the bathtub 3 via the heat exchanger 7, and the other flows to the bathtub 3 via the heat exchanger 7. In this case, because of the water flow resistance in the self-priming pump 50, the flow path to the bathtub 3 via the self-priming pump 50 is lower than the flow path to the bathtub 3 via the heat exchanger 7. Approximately 70% of the hot water from the hot water supply circuit 2 is poured into the bath tub 3 through a flow path passing through the heat exchanger 7 depending on the piping condition. Therefore, at the time of hot water filling, since the flow rate is concentrated on the hot water path to hot water to the bathtub 3 via the heat exchanger 7, water flow noise is generated from the heat exchanger 7 and hot water filling time is required. was there. Therefore, the self-priming pump of the present invention achieves compactness by integrating the suction port joint, the hot water supply joint and the self-priming pump, and also substantially equalizes the balance of water flow resistance in the two hot water filling passages. Therefore, it is an object of the present invention to improve the filling speed and reduce the noise of flowing water from the heat exchanger.

[0005]

According to a first aspect of the present invention, there is provided a self-priming pump comprising: a suction chamber into which circulating water flows; and an impeller for pressurizing the circulating water from the suction chamber by rotation. And an impeller chamber for accommodating the impeller, a reservoir for supplying accumulated water to the impeller chamber to prevent idling of the impeller, and steam for separating circulating water from the impeller chamber into water and air. A separation chamber, a discharge chamber that preferentially discharges separated air to a discharge port and returns separated water to the sump chamber, and a driving chamber that houses a driving device that drives the impeller, includes a driving chamber that stores the circulating water. In the self-priming pump, which suctions and presses and pushes out, the suction port of the circulating water flowing into the suction chamber is formed integrally with an upper portion of the front of the suction chamber, and the water supply port to which the hot water from the water heater is supplied is connected to the water reservoir. Muromasa And summarized in that integrally formed.

In the self-priming pump according to the first aspect of the present invention having the above structure, a suction port for circulating water flowing into the suction chamber is formed integrally with an upper portion of the front of the suction chamber, and hot water is supplied from a hot water supply passage. The water receiving port is formed integrally with the front of the reservoir. Therefore, the conventional connection fitting is eliminated, and the suction port and the water supply port for the hot water supply channel are formed integrally with the self-priming pump, so that the self-priming pump can be made compact and inexpensive. In addition, by providing a water receiving port for inflowing hot water from the hot water supply channel in the water reservoir, the balance of the water flow resistance of the branched hot water path is averaged, and as a result, the discharge port of the self-priming pump is provided as in the related art. Compared to connecting the hot water supply path,
Concentration of the hot water flow rate on the heat exchanger side can be prevented.
Therefore, at the time of hot water filling, the flow rate that does not pass through the heat exchanger can be increased, and the flow of water to the heat exchanger does not concentrate, so that the water flow noise generated in the heat exchanger can be reduced. In addition, since the water flow passage at the time of filling is averaged without being biased to one flow passage, the filling speed is improved, and the filling time can be shortened. Alternatively, as the flow rate to the heat exchanger decreases,
The diameter of the heat exchanger channel can be reduced. In addition, naturally, the conventional function of injecting water from the hot water supply path into the water storage chamber at the time of the first driving and storing priming water for preventing idling of the self-priming pump is not impaired.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of a self-priming pump of the present invention will be described below. The bath apparatus shown in FIG. 1 is a two-can two-water channel (not shown) and includes a reheating circuit 1 and a hot water supply circuit 2. The reheating circuit 1 includes a circulation circuit connected to the bathtub 3 and includes a temperature-sensitive sensor 4 for detecting water temperature, a self-priming pump 5 for circulating bathtub water, and a water flow switch for checking the flow of the circulating water. A water flow detection unit 6 and a heat exchanger 7 for heating circulating water are provided.

The hot water supply circuit 2 and the additional heating circuit 1 are connected within the self-priming pump 5 and, while the self-priming pump 5 is stopped, a hot water heater (not shown) in response to a filling command from a controller (not shown). The bath is filled with water from the bathtub 3. The hot water that has entered the self-priming pump 5 from the water heater branches in two directions, one of which flows to the bathtub 3 via the heat exchanger 7 and the other of which flows back through the upstream reheating circuit 1 to the bathtub. Flow into 3.

A burner 8 for burning fuel gas is provided below the heat exchanger 7, and the heat exchanger 7 heats the circulating water by the heat of combustion by the burner 8. The burner 8 is electrically connected to a controller together with the sensors and actuators, and performs predetermined control such as additional heating, heat retention, and stop.

Next, a schematic diagram (side view) of the self-priming pump 5 is shown.
Will be described with reference to FIG. In addition, FIG.
FIG. 4 shows a diagram indicated by arrows BB. Each chamber of the self-priming pump 5 includes a drive chamber case 11 that houses a rotating body 10 that is rotated by a motor 9, an impeller 12 that rotates by transmitting its rotational force, and an impeller chamber 13 that houses the impeller 12.
It comprises a pump casing 14 for guiding the flow. The drive chamber case 11 and the impeller chamber 13 are coaxially connected via a seal plate 15, and the pump casing 14
And the impeller chamber 13 are provided coaxially with a partition plate 16 interposed therebetween. An impeller 12 having a driven magnet (not shown) is rotatably provided in the impeller chamber 13, and rotates about a rotation shaft (not shown) fixed to the seal plate 15. Also, in the upper part of the impeller chamber 13,
An air / water separation chamber 19 is provided for lowering the flow rate and separating water and air based on the specific gravity difference between water and air (FIG. 4).

On the other hand, a suction chamber 20 is provided in the upper right part of the pump casing 14 (FIG. 3), and a suction circular hole 21 is formed in the lower part of the suction chamber 20 in the partition plate 16 in the center of the impeller 12.
The suction chamber 20 is partitioned by a side wall 22 so as to guide the flow to the suction hole 21 of the partition plate 16. The upper left chamber of the pump casing 14 is provided with the above-described steam-water separation chamber 1.
A discharge chamber 23 communicating with the discharge chamber 9 is provided. Also, discharge chamber 2
A water flow detection unit 6 provided with a water flow switch that is turned on by flowing water is provided at an upper portion of the flow passage 3, and a discharge port 28 thereof is connected to a downstream side of the reheating circuit 1. A water reservoir 24 is provided below the discharge chamber 23 to store priming water for preventing the impeller 12 from running idle. In addition, the partition plate 16 has a through hole 2 communicating from the air / water separation chamber 19 to the upper part of the discharge chamber 23.
5 is provided and is separated into air and water in the air / water separation chamber 19.
Flows preferentially to Further, the air / water separation chamber 19 of the partition plate 16
In the lower part of the chamber, a discharge chamber 23 and a water reservoir 2
A communication port 26 is provided at an intermediate portion between the communication port 4 and the discharge port 23. Further, in the partition plate 16 in the water storage chamber 24 below the discharge chamber 23, a plurality of recirculation holes 27 communicating with the impeller chamber 13 are provided at positions where the impeller 12 can be sucked in so that priming water flows into the impeller chamber 13.

The water reservoir 24 has a hot water supply inlet 18.
Is provided, and a hot water supply circuit 2 that fills the bath tub 3 using the additional heating circuit 1 is connected to the hot water supply inlet 18. The hot water supply inlet 18 is provided at the front of the water storage chamber 24 below the position where the air / water separation chamber 19 and the discharge chamber 23 are provided. This is because the steam-water separation chamber 19 and the discharge chamber 23 are provided as large as possible in order to secure the purpose of reducing the flow velocity and performing steam-water separation, so that the hot-water supply inlet 18 is provided at a position where these chambers are not narrowed. Further, the hot water supply inlet 18 is provided with a water reservoir 24.
It is provided above the lower end of the water storage chamber 24 so that the priming water can be stored.

Further, if air is trapped in the self-priming pump 5, the self-priming performance is reduced.
It is formed integrally with the upper part of the front of the suction chamber 20 so that the inflowing air can be pushed out to the impeller chamber 13. Specifically, the lower end of the suction port 17 is provided at a position 5 mm or more from the upper end of the impeller chamber 13 (FIG. 2). Further, in order to make the connection between the suction port 17 and the conduit as compact as possible, the suction port 17 is formed by making the suction chamber 20 concave so as to secure the flow passage area of the suction chamber 20 ( The recess 29 in FIG. 1). Therefore, when the pipe line of the additional heating circuit 1 is bent and connected to the suction port 17, the protrusion of the bent portion of the pipe line is reduced due to the concave dent, and the connection is made compact.

Next, the operation of the self-priming pump 5 will be described below. By the reheating command from the controller,
The self-priming pump 5 turns on. First, the impeller 12 in the self-priming pump 5 starts to rotate, and while being mixed with the priming water and the air in the sump chamber 24, is pressurized and sent to the steam-water separation chamber 19. In the air / water separation chamber 19, the air and water are separated into air and water.
3 and is pushed out from the discharge port 28. Further, the water flows into the discharge chamber 23 from the passage 26 of the partition plate 16 and falls into the water storage chamber 24. The water chamber 24 is separated from the impeller chamber 13 by the partition plate 16, and a reflux hole 27 is formed in a lower portion of the partition plate 16.
It is sucked into the impeller chamber 13 through 7. By repeating this, the suction chamber 20 becomes negative pressure and pumps up the water in the bathtub 3, and the self-priming pump 5 and the reheating circuit 1 become full and circulates the water in the bathtub 3. Then, the temperature sensor 4 detects the circulating hot water temperature, determines whether or not the controller has reached the set temperature. If the set temperature has not been reached, the burner 8 is ignited by a command from the controller, Combustion is started while circulating, and reheating is performed until the set temperature is reached.

When the bathtub 3 is to be filled with hot water, hot water is supplied from the hot water supply circuit 2 to the self-priming pump 5 and supplied to the bath tub 3 through the connected additional heating circuit 1 in accordance with a command from the controller. . That is, at the time of hot water filling, the hot water supply circuit 2
Hot water is supplied to the sump chamber 24 of the self-priming pump 5 from the
4 divides the flow path, one into the bath 3 via the discharge chamber 23 and the heat exchanger 7, and the other into the impeller chamber 13 and the suction port 17.
Is poured into bathtub 3 via. The flow ratio due to the branching varies somewhat depending on the construction conditions such as the length of the pipeline and the difference in head, but the bias of the flow concentrated on the heat exchanger 7 side is improved as compared with the conventional self-priming pump 5. Are averaged.

When the operation is first started or after the self-priming pump 5 is drained to prevent freezing, the entire interior of the self-priming pump 5 is replaced with air. Therefore, at the start of the operation, in order to prevent the self-priming pump 5 from running idle, a command is issued from the controller.
Water injection from the hot water supply circuit 2 to the self-priming pump 5 is performed, and after the priming water is stored in the water storage chamber 24, the rotation of the impeller 12 is started.

As described above, the self-priming pump 5 of the present embodiment is different from the suction port joint 2 conventionally provided separately.
9. The bath apparatus can be made compact by integrating the hot water supply joint 30 and the self-priming pump 5. Further, by providing the connection of the hot water supply circuit 2 to the water reservoir 24, the flow is prevented from being concentrated on the heat exchanger 7 side when filling with hot water, and the flow rate to the heat exchanger 7 side is reduced. As a result, the water flow noise from the heat exchanger 7 is reduced. Further, at the time of hot water filling, the water flow resistance of each branched hot water path is made substantially uniform, so that the speed of hot water filling the bathtub 3 is improved. Further, since the flow rate to the heat exchanger 7 side is reduced and the pipe diameter in the flow path on the heat exchanger 7 side can be reduced, the bath apparatus can be manufactured at low cost.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. It is. For example, in the present embodiment, in order to facilitate understanding of the invention, a discharge chamber 23 is provided,
Although described as the configuration in which the water reservoir 24 is provided below,
It is not necessary to provide a boundary between the chambers, and a configuration may be adopted in which a discharge is performed at the upper part of the chamber and a water reservoir is formed at the lower part as the name of one room. Further, in this embodiment, the self-priming pump 5 having the configuration of the magnet drive system is shown. However, the self-priming pump 5 having the configuration in which the motor 9 shaft is directly connected to the impeller 12 and sealed with a mechanical seal or a gland packing is used. There may be.

[0019]

As described above, according to the self-priming pump of the present invention, it is possible to reduce the noise during filling and to shorten the filling time. Further, the self-priming pump can be made compact, and the entire system can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a bath apparatus incorporating a self-priming pump according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a self-priming pump according to an embodiment of the present invention.

FIG. 3 is a right plan view in the AA direction of the self-priming pump according to the embodiment of the present invention.

FIG. 4 is a left plan view of the self-priming pump according to the embodiment of the present invention, taken along the line BB.

FIG. 5 is a schematic configuration diagram of a bath apparatus incorporating a self-priming pump according to a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 additional heating circuit 2 hot water supply circuit 3 bathtub 4 temperature sensor 5 self-priming pump 6 water flow detection unit 7 heat exchanger 8 burner 9 motor 10 rotating body 11 drive room case 12 impeller 13 impeller room 14 pump casing 15 seal plate 16 partition Plate 17 Suction port 18 Hot water supply inlet 19 Air / water separation chamber 20 Suction chamber 21 Suction circular hole 22 Side wall 23 Discharge chamber 24 Water reservoir 25 Through hole 26 Through hole 27 Reflux hole 28 Discharge port 29 Recess

Claims (1)

[Claims] A suction chamber into which circulating water flows, an impeller for pressurizing the circulating water from the suction chamber by rotation, an impeller chamber for accommodating the impeller, and supplying the stored water to the impeller chamber. A sump chamber for preventing the idler of the impeller, a steam-water separation chamber for separating the circulating water from the impeller chamber into water and air, and a preferential discharge of the separated air to a discharge port, and a separation of the separated water into the sump. A self-priming pump, comprising: a discharge chamber for returning to the chamber; and a drive chamber for accommodating a drive unit for driving the impeller, wherein the self-priming pump sucks in, pressurizes, and pushes out the circulating water. And a water receiving port to which hot water from a water heater is supplied is formed integrally with the front of the water storage chamber.