JP6082977B2 - Self-priming pump - Google Patents

Description

  The present invention relates to a self-priming pump such as a bath water absorption pump built in a washing machine.

In a conventional washing machine, for the purpose of saving water, a self-priming pump (hereinafter referred to as a pump) such as a bath water absorption pump is built in, and the pump is operated in a water supply process for supplying washing water to the washing tub. There are some that absorb the remaining hot water from the bath water and reuse it as washing water. (For example, Patent Document 1)
In a washing machine having a built-in pump described in Patent Document 1, a water supply hose is connected from a water tap to a water supply electromagnetic valve disposed in the upper part of the washing machine.

  On the other hand, a water absorption hose is connected to the water absorption port at the top of the pump, and the other end of the water absorption hose is arranged to the hot water of the bathtub. And the water overflowing from the priming port and the discharge port of the pump is guided to the washing tub.

  First, the water supply solenoid valve is energized to supply tap water from the water supply solenoid valve. The supplied tap water is supplied as priming water into the pump through a hose partly connected to the priming port. After the energization of the water supply solenoid valve is stopped, the runner (impeller) is rotated in the runner (impeller) chamber by the rotation of the pump motor, and the air and the priming water in the water absorption hose are agitated to be in an air-water mixed state.

  Thereafter, the air / water mixed fluid is again separated into air and water in the air / water separation chamber. Since the separated air is called a discharge port and is discharged from the water port, the atmospheric pressure in the water absorption hose is lowered, and hot water in the bathtub is sucked into the water absorption hose. The sucked hot water reaches the inside of the pump, is discharged from a discharge port and called a water outlet, and is supplied to the washing tub.

  Here, in the washing machine, in order to effectively utilize the space above the washing machine in which the pump and other devices are attached, downsizing of the pump has been required.

  Specifically, the washing machine to which the pump is attached by reducing the volume of the air / water separation chamber of the pump, or by arranging the priming port and the discharge port in the lower part and exposing only the water suction port from the upper plate of the washing machine. For example, reducing the vertical width of the upper space.

  In the pump structure shown in Patent Document 1, the air-water mixed fluid discharged from the runner chamber as the pump motor rotates while the air and the priming water in the water absorption hose are stirred and in the air-water mixed state. However, in order to collide with the pump casing surface, the priming water port side is in a water surface state that is higher than the discharge port side.

  This is because the air-water mixed fluid is discharged from the runner chamber formed in a spiral shape toward the side surface on the priming port side.

  When the priming mouth is lowered, the raised water flows into the priming mouth, the inside of the priming mouth becomes full, pushed by the water pressure of the raised air-water mixed fluid, and a part of the priming water from the priming mouth As the amount of priming water cannot be secured sufficiently, the efficiency of air-water separation is reduced, and the self-priming time may increase or self-priming may become impossible.

In response to this problem, for example, in Patent Document 2, in the pump in which the priming port is arranged below the discharge port, an L-shaped pipe is connected inside, and the other end opening is provided above the lowermost portion of the discharge port. It is proposed to prevent discharge of priming water from the pump and to lower the position of the priming water port than before.

JP 2000-215881 A Japanese Patent No. 2904126

  However, in the L-shaped pipe described in Patent Document 2, when a part of tap water from the water supply electromagnetic valve is supplied to the pump as the priming water, the opening of the L-shaped pipe is arranged higher than the priming port. Therefore, when the water pressure of the tap water supplied from the water supply solenoid valve is low and, as a result, the water pressure of the priming water reaching the priming port is low, the priming water may not be supplied into the pump.

  Further, when the priming port is installed so as to be inclined downward, there is also a drawback that it is difficult for water to enter.

  The present invention solves the above-mentioned conventional problems, and prevents the discharge of priming water from the priming port even when the priming port is arranged low, and prevents the priming water supply even when the priming water pressure is low. An object is to provide a self-priming pump having the same.

In order to solve the conventional problem, a self-priming pump of the present invention is a self-priming pump composed of a motor-side casing, a hose-side casing, a partition plate, and the like, and includes a runner and the runner. A rotating pump motor, a runner chamber formed by the motor-side casing and the partition plate, in which the runner is accommodated and formed in a spiral shape, and formed in the hose-side casing, the bath water is supplied by the rotation of the runner. a water inlet for water to the side casing and the partition plate and the suction chamber which is formed by a suction hole communicating with the runner chamber and the suction chamber is provided in the partition plate, the partition plate and the motor-side casing And the hose side casing, and a runner formed at the end of the spiral shape of the runner chamber by the rotation of the runner A steam-water separating chamber which water is discharged from the outlet, and a discharge port for discharging the water that has been absorbed by the said gas-water separating chamber provided in the hose casing, the steam-water separator chamber is provided in the hose casing a priming port for supplying priming, provided in the runner chamber and a hole for water flowing into the runner chamber from the steam-water separating chamber, Oite the steam-water separator chamber portion, the priming port The hose-side casing is provided with a cylindrical structure that communicates with the priming port, and the cross-sectional area of the cylindrical structure is larger than the cross-sectional area of the priming port. It is characterized by this.

  As a result, even when the priming port is arranged low, discharge of the priming water from the priming port can be prevented, and even when the priming water pressure is low, a self-priming pump having a structure that does not disturb the priming water supply can be realized. It becomes like this.

  The self-priming pump of the present invention prevents the discharge of priming water from the priming port even when the priming port is arranged low, and has a structure that does not disturb the priming water supply even when the priming water pressure is low. Can be realized.

Sectional view of self-priming pump according to Embodiment 1 Top view of hose side casing of self-priming pump according to Embodiment 1 Piping diagram of self-priming pump of washing machine in embodiment 1 Side view of self-priming pump according to Embodiment 1 The side view which shows the state at the time of inclination of the self-priming pump in Embodiment 1 Plan view of hose side casing of self-priming pump in embodiment 2 (A) Cross-sectional view of cylindrical structure in Embodiment 2 (b) Cross-sectional view showing another example of the cylindrical structure (c) Cross-sectional view showing another example of the cylindrical structure Side view showing the cylindrical structure of the self-priming pump in the second embodiment (A) Cross-sectional view of the cylindrical structure in Embodiment 3 (b) Cross-sectional view showing another example of the cylindrical structure (c) Cross-sectional view showing another example of the cylindrical structure Top view of the hose casing of a conventional self-priming pump Side view showing the operating state of a conventional self-priming pump

1st invention is a self-priming pump comprised from a motor side casing, a hose side casing, a partition plate, etc., Comprising: A runner, a pump motor which rotates the runner, the motor side casing, and the partition A runner chamber that is formed by a plate and accommodates the runner and is formed in a spiral shape, and a suction chamber that is formed in the hose side casing and bath water is formed by the hose side casing and the partition plate by rotation of the runner Rotation of the runner formed by a water intake port for absorbing water, a suction hole provided in the partition plate and communicating with the suction chamber and the runner chamber, the motor side casing, the partition plate, and the hose side casing. The steam-water separation chamber in which water is discharged from the runner chamber outlet formed at the spiral end of the runner chamber, A discharge port for discharging the water water in the steam-water separator chamber provided over scan casing, a priming port for supplying priming to the gas-water separating chamber provided in the hose casing, provided in the runner chamber provided with a hole for water flowing into the runner chamber from the steam-water separating chamber, Oite the steam-water separator chamber portion, the priming port, provided at an upper portion of the runner chamber outlet, the hose A side casing is provided with a cylindrical structure that communicates with the priming port, and the cross-sectional area of the cylindrical structure is larger than the sectional area of the priming port. Since an air layer can be formed inside the cylindrical structure and the priming port, discharge of priming water can be prevented. Moreover, since the cross section of the cylindrical structure is larger than the cross sectional area of the priming port, it becomes easy to supply priming water even when the priming water pressure is low.

  In the second invention, in particular, the cross-sectional shape of the cylindrical structure of the first invention is generated in a simple circular shape by having an ellipse, a polygon, or a combination of an arc and a rectangle. The influence of easy surface tension can be reduced, and the inflow of priming water can be facilitated even when the priming water pressure is low.

  In the third invention, in particular, the sectional area of the cylindrical structure of the first or second invention is gradually changed along the axial direction of the cylindrical structure, so that the priming water pressure is low. In such a case, the inflow of priming water can be facilitated by flowing the water along the direction of gravity using the inclination of the inner surface in the axial direction.

  In the fourth aspect of the invention, in particular, the inner peripheral surface of the cylindrical structure according to any one of the first to third aspects is provided with a rib standing on the inner peripheral surface, so that the priming water pressure is low. In this case, the priming water that has flowed into the cylindrical structure can be rectified and guided into the pump, so that the priming water can be easily introduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of a self-priming pump in the present embodiment, which functions as a bath water absorption pump that is mounted on a washing machine and uses bath water as washing water. FIG. 2 is a top view of the hose side casing of the self-priming pump according to the present embodiment, and FIG. 3 is a piping diagram of the water supply electromagnetic valve and the self-priming pump of the washing machine according to the present embodiment.

  In FIG. 1, a self-priming pump (hereinafter referred to as a pump) includes two casings (a motor-side casing 1 and a hose-side casing 2), a partition plate 3, a pump motor 4, a runner 5, a check valve 6, and the like. ing.

  The motor-side casing 1 includes a housing portion 7 for the pump motor 4 and an oil seal portion 8. The pump motor 4 is coupled to the motor-side casing 1 via the oil seal portion 8, and a runner 5 is attached to the motor shaft 10. It is attached.

The hose side casing 2 is formed with a water intake port 11 of a bath water absorption hose 15 connected to a bathtub and a suction chamber 12. Further, a priming port 13 for supplying priming water into the pump and a discharge port 14 for discharging bath water absorbed from the water suction port 11 by the rotation of the runner 5 are provided.

  The suction chamber 12 is provided with a check valve 6 for preventing water from flowing backward to the bath water suction hose 15 side. A partition plate 3 is disposed between the motor-side casing 1 and the hose-side casing 2, and the two casings are joined so that airtightness is maintained.

  The partition plate 3 divides the runner chamber 16 and the suction chamber 12 and communicates with the central suction hole 17. As shown in FIG. 6 described later, the runner chamber 16 has a spiral shape, and the runner chamber 16 is provided with a hole 26 through which water flows from the casing. A steam separation chamber 18 is formed inside the pump.

  Next, the operation of the pump will be described.

  In FIG. 3, when the bath water absorption operation starts, the water supply electromagnetic valve 19 connected to the faucet is energized to supply tap water. Water is supplied to the water supply chamber 20 for 30 seconds, and the water supply electromagnetic valve 19 is deenergized and stopped.

  The water supply chamber 20 and the water supply electromagnetic valve 19 are connected by a packing 21, the water supply chamber 20 and the pump inlet 13 are connected via a packing 22a, and the water supply chamber 20 and the pump discharge port 14 are connected via a packing 22b. Has been.

  The water supply chamber 20 is open to the atmosphere, and a part of the water having a pressure close to the atmospheric pressure is supplied into the pump through the priming port 13 at the time of water supply, and the overflowed water is guided to the lower washing tub.

  The runner 5 is rotated by the rotation of the pump motor 4. Along with this, the air in the bath water suction hose 15 connected to the suction chamber 12 through the water suction port 11 is sucked, the suction chamber 12 becomes negative pressure, and the water in the runner chamber 16 is in an air-water mixed state. Then, it is discharged to the steam-water separation chamber 18 side.

  Of the water and air separated in the steam / water separation chamber 18, the air is discharged from the priming port 13 and the discharge port 14, and the water returns again to the runner chamber 16 through the hole 26 and is in the bath water absorption hose 15. Inhale.

  FIG. 10 shows a top view of a hose-side casing of a conventional self-priming pump, and as shown in FIG. 10, a priming port 13 for putting priming water into the pump and partially discharging the absorbed bath water, The discharge port 14 for discharging the absorbed bath water is provided.

  FIG. 11 is a side view showing a state during operation of the conventional self-priming pump, in which the water level 24 inside the casing on the side of the priming port 13 is shown.

  Conventionally, as shown in FIG. 11, the water coming out of the runner chamber 16 hits the wall surface of the pump case and rises in the pump case to raise the water level 24. Therefore, if the pump is downsized and the priming port 13 is arranged further downward, the raised water becomes full in the priming port 13, so that the priming water is discharged while the air in the bath water suction hose 15 is being discharged. Water is discharged from the mouth 13 and the priming water is lowered.

  However, according to the present embodiment, as shown in FIG. 2, such a situation does not occur because the cylindrical structure 23 communicated with the priming port 13 is provided inside the casing.

FIG. 4 is a side view of the self-priming pump in the present embodiment, in which the water level 24 inside the casing on the side of the priming port 13 is shown.

  The cylindrical structure 23 communicates with the priming port 13 and extends inside the pump casing. In this configuration, when the pump motor 4 is rotated, the water discharged from the runner chamber 16 rises and the water level 24 rises. The raised water level becomes low with the upper part of the runner chamber outlet 28 as a peak. And the part which became low becomes an air layer.

  Since there is a cylindrical structure 23 at the upper part of the runner chamber outlet 28, the raised water collides with the lower part of the cylindrical structure 23 while the air in the bath water absorption hose 15 is mixed with air. It does not enter the inside of the cylindrical structure 23 alone, and the other end periphery of the cylindrical structure 23 is also in a position where an air layer is formed, so that almost no water enters the inside of the cylindrical structure 23. .

  Thus, by setting the end of the cylindrical structure 23 to a length that reaches the air layer in the casing, the inside of the cylindrical structure 23 and the priming port 13 can be used as an air layer, and the inside of the priming port 13 Does not become full, and discharge of priming water can be prevented.

  When the operation of the pump motor 4 is continued, all the air in the bath water absorption hose 15 is eventually discharged, and water from the bathtub is sucked and discharged from the priming port 13 and the discharge port 14 in the pump.

  At this time, since the inside of the pump is filled with water, the inside of the cylindrical structure 23 is also filled with water and the priming port 13 is also filled with water, so that water is discharged from both the priming port 13 and the discharge port 14.

  When the operation of the pump motor 4 is stopped, the water level 24 in the pump naturally flows out to the position below the priming port 13 and then drops and then stops.

  If the cylindrical structure 23 is provided as described above, the pump operation can be continuously performed without discharging the priming water even if the water in the runner portion is raised during the pump operation.

  As shown in FIG. 4, the cylindrical structure 23 is larger than the cross-sectional area of the priming port 13, and the lower end of the cross section is disposed below the lower end of the priming port. Since it flows downward, the priming water is easier to enter than the cylindrical structure 23 having the same shape as the priming port 13.

  FIG. 5 is a side view showing the tilted state of the self-priming pump according to the present embodiment, and the cross section of the cylindrical structure 23 even in the state of the water level 24 when the priming port 13 side is slightly inclined downward. Since the spread of the portion absorbs the influence of the inclination, the priming water can be easily supplied even when the priming water pressure is low.

  Moreover, as a structure of this cylindrical structure 23, you may integrally mold with the hose side casing 2, and you may join another part to a priming port part from the inner side of the hose side casing 2. FIG.

  In this way, by extending the cylindrical structure having a cross-sectional area larger than the cross-sectional area of the priming port, when the priming water pressure is low, the priming port and the discharge port side are inclined so that they are obliquely downward. Even if it is attached, it has a structure in which priming water can easily enter, and sufficient priming water for self-priming can be secured.

(Embodiment 2)
FIG. 6 is a plan view of the hose side casing 2 as viewed from the motor side casing 1 side.

  A runner chamber 16 is formed in the partition plate 3, and the runner chamber 16 has a spiral structure. The water in the air / water mixed state discharged from the runner chamber 16 collides with the air / water separation plates 25a, 25b, and 25c to reduce the flow velocity, and is separated into gas and water. It will be discharged from.

  Here, in FIG. 6, the cross-sectional shape of the cylindrical structure 23 exemplifies a circular shape having a cross-sectional area larger than the priming port 13, but FIG. 7 illustrates another cross-sectional shape of the cylindrical structure 23. Is.

  The cross section of the priming port 13 is usually circular in order to connect a hose, but the cylindrical structure 23 side may have a shape other than circular because there is no condition of hose connection. For example, an elliptical shape shown in FIG. 7A, a rectangular shape shown in FIG. 7B, or a shape formed by a combination of an arc and a rectangle shown in FIG.

  As shown in FIGS. 7 (a), 7 (b), and 7 (c), the priming port is formed by shifting the lower end of the cross-sectional shape of the tubular structure 23 to a position below the lower end of the priming port 13. The water that has entered from 13 falls downward by gravity at the communicating portion between the priming port 13 and the cylindrical structure 23, and a flow of water can be generated to facilitate entry of the priming water.

  Further, water has a property of generating surface tension in an arc shape, and the influence of the water may hinder the flow of water inside the cylindrical structure 23 at low water pressure, but the elliptical shape shown in FIG. By making the shape and the rectangular shape shown in FIG. 7B, the flow of water is not hindered even at low water pressure.

  FIG. 8 is a side view showing another example of the cylindrical structure 23.

  In FIG. 8, the tubular structure 23 is slightly inclined downward, and the cross-sectional area of the tubular structure 23 gradually changes along the axial direction of the tubular structure 23. Is.

  As described above, by providing the cylindrical structure 23 with the inclined portion, it is possible to generate the flow of water by making the inclined portion transmit water, thereby facilitating entry of priming water.

  In addition, the priming port 13 can respond | correspond by lowering to the upper position from the exit of the runner chamber 16.

(Embodiment 3)
As shown in FIG. 9, an inwardly convex rib 27 is provided at the lower part of the inner peripheral surface of the cylindrical structure 23.

  Thus, by providing the rib standing on the inner peripheral surface of the cylindrical structure 23, the water flowing through the cylindrical structure 23 is rectified, and the priming water can be supplied into the pump more smoothly.

  As described above, the self-priming pump according to the present invention can prevent discharge of priming water during operation of the pump motor even when the position of the priming port is low. Applicable to equipment.

4 Pump Motor 5 Runner 11 Water Intake Port 13 Nominal Water Port 14 Discharge Port 23 Tubular Structure 27 Rib

Claims (4)

A self-priming pump composed of a motor-side casing, a hose-side casing, a partition plate, and the like, which is formed by a runner, a pump motor that rotates the runner, the motor-side casing, and the partition plate and runner chamber runner is formed on the housing spiral, water inlet for water to bath water by the rotation of the runner is formed in the hose casing in the hose casing and the partition plate and the suction chamber which is formed by And a suction hole provided in the partition plate that communicates the suction chamber and the runner chamber, the motor side casing, the partition plate, and the hose side casing. An air-water separation chamber in which water is discharged from the runner chamber outlet formed at the end of the shape, and the hose side case A discharge port for discharging the steam-water separator chamber to absorb water formed in the grayed, the priming port for supplying priming to the gas-water separating chamber provided in the hose casing, the gas provided in the runner chamber It includes a hole for flowing water into the runner chamber from the water separating chamber, a Oite the steam-water separator chamber portion, the priming port, provided at an upper portion of the runner chamber outlet, the hose casing Is a self-priming pump characterized in that a cylindrical structure communicating with the priming port is provided, and the sectional area of the cylindrical structure is larger than the sectional area of the priming port. 2. The self-priming pump according to claim 1, wherein a cross-sectional shape of the cylindrical structure has an ellipse, a polygon, or a combination of an arc and a rectangle. The self-priming pump according to claim 1 or 2, wherein a cross-sectional area of the cylindrical structure is gradually changed along an axial direction of the cylindrical structure. The self-priming pump according to any one of claims 1 to 3, wherein a rib standing on the inner peripheral surface is provided on an inner peripheral surface of the cylindrical structure.