JPH11280663A - Water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water supply system able to sufficiently cool a totally enclosed motor of a water supply pump provided within a case by means of a cooling fan. SOLUTION: This water supply system is provided with a foam urethane cover wall 19 at the outer portion between the intake side and discharge side of a fan casing 13 composed of a cooling fan 12 installed at the end portion of a totally enclosed motor 10 which drives a pump portion 9, so as to project from the outer portion to the periphery. An air space on the periphery of the fan casing 13 is divided into the intake side and the discharge side and the cooling air blown from the blow opening 16 of the fan casing 13 is simply sucked in from the intake opening 15 of the fan casing 13. Most of the cooling air blown from the cooling fan 12 is able to be used efficiently to cool the totally enclosed motor 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply apparatus for supplying water to a home, for example.

[0002]

[Prior Art] At homes such as apartments and condominiums,
Water is supplied to each household using a water supply device employing a water supply pump. Such a water supply pump has a motor part that drives the pump part,
A fully-closed motor that is less susceptible to water and moisture is used.

[0003] By the way, in a water supply device installed outdoors, the water supply pump is combined with other equipment in order to protect the water supply pump from the rain and the like and to block noise generated by a pump portion and a motor portion constituting the water supply pump. It is done to cover with a case.

However, the heat exchange performance of the fully-closed motor is limited by the installation of the case. Therefore, in order to supplement the cooling performance of the fully-closed motor, an external fan (cooling fan) is installed at the end opposite to the pump section of the fully-closed motor in an outdoor specification (covered type) water supply device. That is being done.

[0005] The external fan is a combination of a tubular fan casing mounted around the outer periphery of the end of the fully closed motor and a propeller fan (fan) housed in the fan casing. The propeller fan is connected to the end of the motor shaft, and the fan casing sucks cooling air from the casing end on the opposite side of the pump section and blows out the cooling air from the casing end on the pump section side along the outer peripheral surface of the motor body. The surface of the motor is forcibly cooled by cooling air flowing on the outer peripheral surface of the motor, so that the cooling performance of the motor is promoted.

[0006]

Since the water supply device is used for a long period of time, high reliability and high durability are required. In particular, in the case of outdoor specifications, since the periphery of the fully-closed motor is blocked by the case of the water supply device, it is required to ensure sufficient cooling performance.

However, since the distance between the suction side of the external fan and the outlet side of the outlet is short, the external fan is blown out from the outlet of the external fan and the temperature increases due to heat exchange with the motor body. A short circuit is apt to occur, in which a part of the cooled air is sucked into the outlet of the external fan before or during cooling by heat exchange with the pump unit.

For this reason, there is a problem that the temperature of the fully-closed motor tends to rise, and improvement is demanded. The present invention has been made in view of the above circumstances, and an object thereof is to provide a water supply device capable of sufficiently cooling a fully-closed motor of a water supply pump housed in a case by a cooling fan. To provide.

[0009]

According to a first aspect of the present invention, there is provided a water supply apparatus, comprising: a suction side of a fan casing constituting a cooling fan mounted at an end of a fully-closed motor for driving a pump; A shielding wall is provided on an outer peripheral portion between the outer peripheral portion and the outer peripheral portion so as to protrude from the outer peripheral portion to block the space around the fan casing between the suction side and the discharge side, so that the cooling air blown out from the fan casing is removed. , So as not to be sucked from the suction side of the fan casing in a short circuit,
Most of the cooling air blown from the cooling fan is used for cooling the fully closed motor.

[0010] The water supply apparatus of claim 2 has the above-mentioned object,
Furthermore, the shielding wall is formed of a heat insulating member having a sound absorbing property so as to reduce the noise of the motor while suppressing unnecessary temperature rise of the suction side air.

[0011] The water supply apparatus according to claim 3 has the above-mentioned object.
Further, in order to cool the cooling air whose temperature has risen after cooling the fully-closed motor for a long period of time, the air flow is blown along the outer peripheral surface of the fully-closed motor so that the air flows in the case. This is because piping and equipment connected to the pump section are arranged along the flow path.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on one embodiment shown in FIGS. FIG. 1 shows a view from the front side of a water supply apparatus to which the present invention is applied, and FIG. 2 shows a view from an arrow A in FIG. 1, where 1 is a gantry.

The gantry 1 is composed of, for example, a combination of a frame portion 2 formed in a rectangular shape so as to be longer in the left-right direction and legs 3 projecting downward from four corners of the frame portion 2. The lower ends of these legs 3 are installed, for example, on the ground. The openings between the legs 3 are all closed by the cover 1a.

On the upper part of the gantry 1, a sub gantry 4 is installed to constitute a two-story gantry structure. Two (plural) units are provided on the upper part of the gantry 1 and the upper part of the sub gantry 4 in the upper and lower stages
Are installed in the same horizontal direction.

A case 6 is fastened to the upper part of the gantry 1 so as to surround the upper and lower water supply pumps 5 from the periphery. The case 6 has a bottom-less box-shaped case body 6 extending upward in accordance with the outer shape of the gantry 1 and having an open front side.
a and a door 7 for opening and closing the front opening of the case body 6a. However, water supply pumps 5, 5
Is stored on the left side of the case 6.

Each of the water supply pumps 5 has a pump base 8 mounted on the gantry 1 and the sub gantry 4, and a pump section 9 is installed on the right side of the pump base 8 and the pump section 9 is installed on the left side. A closed motor 10 is provided. The right end of the motor shaft 11a supporting the rotor 11 of the fully closed motor 10 is connected to the pump shaft (not shown) of the pump unit 9.
It is connected to.

At the left end of each fully closed motor 10,
Each is equipped with an external fan 12 (corresponding to the cooling fan of the present invention). Each of these external fan fans 12 and 12 has a fully-closed motor 10 as shown by a cross section in FIG.
And a propeller fan 14 (impeller: corresponding to the fan of the present application) combined with a short tubular fan casing 13 mounted so as to surround the outer periphery of the end of the motor body 10a. It is composed. The propeller fan 14 is connected to the left end of the motor shaft 11a. Further, the fan casing 13 has a suction port 15 at an end opposite to the pump section 9, and has an air outlet 16 at the end on the pump section 9 side that opens sideways following the outer peripheral surface of the motor body 10. When the propeller fan 14 is driven to rotate by the fully-closed motor 10, the cooling air is sucked in from the suction port 15 on the opposite side of the pump unit 9, and flows along the outer peripheral surface of the motor body 10 from the outlet 16 on the pump unit 9 side. To make it blow out.

A shield wall 19 is provided on the outer peripheral portion of the fan casing 13 of each of the external fan fans 12 and 12. Specifically, as shown in FIGS. 2 and 3, the shielding wall 19 is a heat insulating member having a sound absorbing property, for example, a substantially rectangular plate-like urethane foam member having a circular hole formed in a central portion. It is formed from The hole is fitted into the outer peripheral portion of the fan casing 13, and the whole of the shielding wall 19 is mounted between the opposite side of the pump where the inlet 15 is located and the pump side where the outlet 16 is located. Although FIG. 3 shows only the shielding wall 19 of the upper water supply pump 5, the same applies to the shielding wall 19 of the lower water pump 5.

By this mounting, the urethane foam plate can be extended from the outer peripheral portion of the fan casing 13 to each portion (the back surface of the case main body 6, the inner surface of the door body 7, the upper surface of the sub mount 4, etc.) disposed around the plate. A suction-side space 21 through which the cool air flows through the space 20 around the fan casing 13 (the space on the left side of the shielding wall 19 in FIGS. 1 and 3) and an exhaust-side space 22 through which the high-temperature exhaust flows (in FIGS. 1 and 3). The space on the right side of the shielding wall 19 in FIG. 3).

The exhaust side space 22 is provided with piping and equipment connected to the pump section 9 in accordance with the cooling air flow after cooling the fully closed motor 10. More specifically, the flow of the cooling air flows upward / downward by contacting the inner surface on the right side of the case 6.
A suction header 23 and a discharge header 24 that extend along the direction of the cooling air flow, that is, the vertical direction, are provided in the exhaust-side space 22 adjacent to the front side (right side) of the pipe 5. Each of the headers and the suction portions and the discharge portions of the water supply pumps 5 and 5 are connected to each other by a suction pipe portion 25 and a discharge pipe portion 26 which also extend in the direction of the cooling air flow, that is, in the left-right direction. A check valve 27 and a sluice valve 28 are attached to the discharge pipe portion 26.

The cooling air that comes into contact with the inner surface of the case 6 and moves downward flows through the internal space 1 a (closed space) of the gantry 1 to the left and returns to the suction port 15 of each of the external fan fans 12.
The lower end side of the suction header 24 extends through the frame 2 of the gantry 1 to the internal space 1a of the gantry 1 and extends leftward in the internal space 1a, specifically the strainer 2
9, a backflow prevention device 30 and a suction port 31 are connected to a suction side pipe 32 connected in order.

For the same reason, the lower end of the discharge header 24 is
It extends to the internal space 1 a of the gantry 1 and is connected to the discharge port 33. The suction port 28 and the discharge port 29 are connected to external pipes through the soil, or are connected to external pipes (both not shown) by opening holes in the cover 1b.

Further, an accumulator 34 for maintaining a predetermined water supply pressure is connected to the upper end of the discharge header 24, and the cooling air from the external fan 12, 12 whose temperature has risen after the cooling of the fully-closed motor 10 has been completed. In addition, the cooling air is cooled by touching the surfaces of pipes and equipment (all of which have water flowing therein) arranged in most of the paths through which the cooling air flows.

In addition, immediately above the water supply pump 5 at the uppermost stage,
A control panel 36 (control device) surrounded by a heat insulating wall 35 is attached. With the urethane foam member of the outer fan 12 and the piping and equipment connected to the pump section 8, the fully closed motor 10 can be sufficiently cooled in the case 6.

That is, when the fully-closed motor 10 is excited, the rotational force generated in the rotor 11 is transmitted from the motor shaft 11a to the impeller (not shown) of the pump unit 9 in each of the water supply pumps 5, 5. Rotate the impeller. By the rotation of the impeller, water is sucked from the suction port 31 and is discharged from the discharge port 33.

At this time, the propeller fan 14 of the outer fan 12 of each of the water supply pumps 5, 5 is rotationally driven by the rotational force transmitted from the motor shaft 11a. Thereby, the air in the suction side space 21 is sucked from the suction port 15 as cooling air.

The cooling air flows from the outlet 16 as shown by the arrows in FIG. 1 and FIG.
0a is blown out laterally along the outer peripheral surface. Thereby, the cooling air flows toward the pump unit 9 while touching the outer peripheral surface of the motor body 10a and the radiation fins 10b rising from the outer peripheral surface.

While the air passes through the motor body 10a, heat exchanges with the surface of the motor body 10 to forcibly cool the motor whose temperature is rising. At this time, if the outer fan 12 does not have the shielding wall 19, the cooling air whose temperature has risen rises before being cooled by the subsequent pump unit 11 or during cooling, and the suction air of the outer fan 12 is sucked again. Mouth 1
5 occurs, but the space 20 around the outer fan 12 is blocked by the suction side space 21 and the exhaust side space 22 by the shielding wall 12, so that the cooled high-temperature air is short-circuited. Again the suction port 1 of the external fan 12
There is no short circuit to reach 5.

Further, since the shielding wall 19 is formed of urethane foam having heat insulation, the air in the suction side space 20 is exposed to the high-temperature air due to the heat insulating performance of the shielding wall 19. The temperature does not rise unnecessarily.

As a result, most of the cooling air blown from the outer fan 12 is efficiently used for cooling the fully closed motor 10. On the other hand, the cooling air whose temperature has risen after cooling has reached the pump section 11 as described above, and the surface of the pump section 11 whose temperature is low due to water (low temperature) flowing inside the pump section 11, likewise the pump Cooling is performed by exchanging heat with a low-temperature atmosphere around the portion 11.

Further, the cooling air is supplied to various pipes and devices arranged in advance along a path through which the cooling air flows in the case 6, specifically, as shown by an arrow in FIG. , The discharge side pipe part 26, the suction header 23, the discharge header 24, and the accumulator 34, and then the suction side pipe part 25, the discharge side pipe part 26, the suction header 23, the discharge header 24, and the suction side pipe 32. Then, it returns to the suction port 15 of the outer fan 12 again.

In this way, cooling of the cooling air using water (low temperature) flowing through the inside of the case 6 is performed in most of the flow path in the case 6 as in the case of the pump unit 11. In other words, the cooling air is cooled for a long time by using the air flowing through the case 6.

In this manner, the cooling of the fully-closed motor 10 can be sufficiently performed even in the sealed case 6. Moreover, since the shielding wall 19 is formed of urethane foam having a sound absorbing effect, the noise of the fully-closed motor 10 can be reduced.

In the above embodiment, the shielding wall is made of urethane foam. However, the present invention is not limited to this. The shielding wall may be made of another heat absorbing member having a sound absorbing property. It goes without saying that a shielding wall may be combined with an external fan using a fan (impeller) below the propeller fan.

Further, in one embodiment, a water supply device that surrounds a water supply pump in two stages, upper and lower, is taken as an example. However, the present invention is not limited to this. The present invention may be applied to a water supply device in which a plurality of water supply pumps are disposed above and these are enclosed by a case.

[0036]

As described above, according to the first aspect of the present invention, the shielding wall can be extended from the outer peripheral portion of the fan casing constituting the cooling fan of the fully-closed motor, and the space around the fan casing can be reduced. Since the air is blocked between the suction side and the discharge side, the cooling air blown out from the fan casing can be prevented from being short-circuited and sucked from the suction side of the fan casing.

As a result, most of the cooling air blown out from the cooling fan can be used for cooling the fully-closed motor, and the cooling fan can sufficiently efficiently cool the fully-closed motor of the water supply pump housed in the case. can do.

According to the second aspect of the present invention, furthermore, even if the shielding wall is exposed to high-temperature air, the temperature of the air on the suction side does not needlessly increase even if the shielding wall is exposed to high-temperature air.
Further, the fully closed motor can be cooled more efficiently.
In addition, the noise absorption of the fully-closed motor can be reduced due to the sound absorbing performance of the shielding wall, and a water supply device excellent in cooling / quietness of the fully-closed motor can be provided.

According to the third aspect of the present invention, the cooling air whose temperature has been raised by cooling the fully-closed motor is used for the most part of the passage in the case by utilizing the water (low temperature) flowing inside. Can be cooled. As a result, the cooling air whose temperature has risen can be cooled for a long time, and more efficient cooling of the fully closed motor can be realized.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view for explaining the structure of a water supply device according to an embodiment of the present invention.

FIG. 2 is a side view in which most of the parts are cut away as viewed from an arrow A in FIG.

FIG. 3 is a perspective view for explaining a structure around an outer fan of a water supply pump.

[Explanation of symbols]

5: Water supply pump 6: Case 9: Pump section 10: Fully closed motor 12: External fan (cooling fan) 13a: Fan casing 14: Propeller fan (fan) 15: Suction port 16: Outlet 19: Shielding wall 20 Surrounding space 23, 24, 25, 26, 32: suction header, discharge header, suction pipe section, discharge pipe section, suction side pipe (pipe) 29, 30, 34 ... strainer, backflow prevention device, accumulator (equipment).

Claims (3)

[Claims] A pump is connected to one end of a fully-closed motor, a cooling fan is mounted on the other end, and the cooling fan is mounted so as to surround an outer peripheral portion of the fully-closed motor. By combining a fan casing and a fan accommodated in the fan casing and rotationally driven by the fully-closed motor, cooling air is sucked in from the fan pacing portion on the opposite side to the pump portion, and the cooling air is drawn from the fan casing portion on the pump portion side. A water supply pump configured to blow out along the outer peripheral surface of the closed motor, a case accommodating the water supply pump, and projecting from an outer peripheral portion between the suction side and the discharge side of the fan casing to the periphery. A water supply device, comprising: a shielding wall provided to block a space around the fan casing on a suction side and a discharge side. 2. The water supply device according to claim 1, wherein the shielding wall is formed of a heat insulating member having a sound absorbing property. 3. The case is provided with piping and equipment connected to the pump section along a path along which the air flow flows so as to contact the air flow blown along the outer peripheral surface of the fully closed motor. The water supply device according to claim 1, wherein the water supply device is provided.