JPH09126123A - Fluid discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change over discharge passages by changing the normal and reverse directions of a pump drive system without the necessity of a valve drive system. SOLUTION: A first water feed pipe 14 is connected thereto with a suction valve V1 and a discharge valve V2 which are opened when the upstream side pressure becomes relatively high, and a second water feed pipe 15 is connected thereto with similar suction and discharge valves V3 , V4 . One of output and input ports 10a of a regenerative pump 11 is connected to the first water feed pipe 14 between the suction and discharge valves V1 , V2 , and the other one of the input and output ports 11b of the pump 11 is connected to the second water feed pipe 15 between the suction and discharge valves V3 , V4 . When the regenerative pump 11 is normally driven so that the output and input ports 11a, 11b are set on the suction and discharge sides, respectively, water is discharged from a water reserving tank 13 to the second water feed pipe 15 through the suction valve V1 , the regenerative pump 11 and the discharge valve V4 , and when the regenerative pump 11 is reversed, water is discharged to the first water feed pipe 14 through the suction valve V2 , the regenerative pump 11 and the discharge valve V2 .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge passage of a pump in a toilet seat with a sanitary hot water washing device having a discharge passage in two directions to an anus washing nozzle and a bidet nozzle, a hydraulic equipment for various controls, and the like. Technology for switching between.

[0002]

2. Description of the Related Art Conventionally, a fluid discharge device capable of switching a discharge path employs a switching means such as a manual valve or a solenoid valve. That is, as shown in FIG.
A fluid (for example, water) from the tank 2 is supplied to the variable direction pump 1
Discharge path 3 branched from the discharge port via the
Or, in the case of enabling selective discharge to 4, the discharge path 3,
Each of the valve units 4 and 5 is provided with a valve device 5, 6 such as a flow control valve or an on-off valve. In this case, the drive system of the entire device is
Whether the control of the valve devices 5 and 6 is performed manually or electrically, a drive system 8 for the valve devices 5 and 6 is necessary in addition to the drive system 7 of the variable direction pump 1.

A regenerative pump as shown in FIG. 7 is typically used as the variable direction pump 1. In this regenerative pump, a rotating body 1b having a structure in which a large number of radial grooves are formed on the side surface of a disk is arranged in a housing 1a, and a pump flow path 1 along the circumference between the housing 1a and the rotating body 1b.
c has a structure in which inlet and outlet ports 1d and 1e opened at both ends thereof are formed, and pump pressure is applied to the fluid in the pump passage 1c by friction with the rotating body 1b.
Since it is possible to obtain a high head with a small driving force, it is widely used as an electric shallow well pump for home use. Further, this type of regenerative pump is characterized in that the discharge direction is symmetrically switched depending on the rotation direction of the rotating body 1b, that is, when the rotating body 1b rotates counterclockwise in the drawing (normal rotation), As shown by the solid line arrow, the fluid is the inlet / outlet port 1d.
When the rotating body 1b is rotated (reversely) in the clockwise direction from the inlet / outlet port 1e, as shown by the broken line arrow in the figure,
Conversely, it is sent from the input / output port 1e to the input / output port 1d.

As the direction variable pump 1 in which the discharge direction is symmetrically switched depending on the rotation direction as described above, a vane pump, a gear pump, and the like can be used in addition to the regenerative pump as described above.

[0005]

According to the above-mentioned prior art, when the discharge path from the variable direction pump 1 is switched by the control of the valve devices 5 and 6 such as the flow rate adjusting valve, as described above, the variable direction pump 1 is used. Since the drive system 8 for the valve devices 5 and 6 is required in addition to the drive system 7 of FIG. When the direction variable pump 1 is a regeneration pump as shown in FIG. 7 or a vane pump, the relationship between the suction side and the discharge side reversibly changes depending on the rotation direction. The route itself does not change.

The present invention has been made under the circumstances as described above, and its technical problem is that the valve drive system is not required, and the discharge path is formed only by the forward and reverse rotations of the pump drive system. Another object of the present invention is to provide a fluid discharge device capable of switching between the two.

[0007]

As a means for effectively solving the above-mentioned technical problems, a fluid discharge device according to the present invention is provided at both ends of a pump passage along the outer circumference of a rotating body that can rotate in forward and reverse directions. A direction variable pump having a pair of inlet / outlet ports that symmetrically switch the relationship between the suction side and the discharge side according to the forward / reverse rotation of the rotating body, and the first and the first extending in parallel from the fluid supply source. The second pipe, and an upstream suction valve and a downstream discharge valve that are provided in series with each of the first and second pipes and allow only the flow from the fluid supply source side, and the direction variable Each inlet / outlet port of the pump is connected between the intake valve and the discharge valve in the first pipe and between the intake valve and the discharge valve in the second pipe, respectively.

In this configuration, the directional pump has a reversible change in the relationship between the suction side and the discharge side depending on the forward and reverse rotations of the rotating body, like the regenerative pump described in the prior art.
The intake valve and the discharge valve are check valves that open when the fluid pressure on the upstream side (fluid supply source) becomes relatively higher than the fluid pressure on the downstream side.

Therefore, when the rotating body of the variable direction pump is driven in either the forward or reverse direction, the suction valve is installed on either one of the first and second pipes connected to the inlet / outlet port on the suction side. Is opened when the downstream side receives suction pressure and the upstream side becomes relatively high pressure, and the discharge valve is closed when the upstream side receives suction pressure and becomes low pressure, and is discharged to the inlet / outlet port on the discharge side. On the other connected pipe, the suction valve is closed when its downstream side receives discharge pressure and becomes high in pressure, and the discharge valve is opened when its upstream side receives discharge pressure and becomes high. Therefore, the fluid of the fluid supply source is sucked into the variable direction pump through the suction valve on one of the pipes on the suction side, is discharged from this variable direction pump, and is then discharged to the other pipe on the discharge side. It is discharged through the upper discharge valve. The fluid supply source does not need to actively send out the fluid, and corresponds to, for example, a water storage tank.

As another means for effectively solving the above-mentioned technical problems, a fluid discharge device according to the present invention has a pair of pump passages at both ends of a pump passage along the outer circumference of a rotating body that can rotate in forward and reverse directions. A regeneration pump having a discharge port opened and an intake port opened in the middle of the pump flow path, and a discharge valve provided in a discharge path extending from each of the discharge ports and permitting only a downstream flow.

In this structure, the regeneration pump causes the fluid in the pump passage on the outer periphery of the rotating body to have a pressure at the discharge port on the forward end side of the pump passage with respect to the rotating direction due to friction with the rotating body. Decreases, and the pressure of the discharge port on the opposite side rises.
When the rotating body rotates in either the forward or reverse direction, the discharge valve on the discharge path extending from the discharge port on the low pressure side is blocked by the low pressure on the upstream side, and the discharge valve extending from the discharge port on the high pressure side. The discharge valve on the path is opened by the high pressure on the upstream side. Therefore, the fluid is sucked from the suction port which is always opened to the pump flow path at a position between the both discharge ports, and is discharged from the high-pressure side discharge port.

Further, in this case, if the suction port of the regeneration pump is provided so as to be unevenly distributed from the center in the circumferential direction of the pump flow path to one of the discharge ports, the fluid sucked from the suction port into the pump flow path is The pump pressure given by the friction with the rotating body in the process until it is discharged from the discharge port differs depending on whether the rotating body rotates in the forward or reverse direction, so set an appropriate discharge pressure that differs depending on the discharge path. You can

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a first embodiment of a fluid ejection device of the present invention which is applied as a water supply means to an anus washing nozzle and a bidet nozzle of a toilet seat with a sanitary hot water washing device, for example. It is shown in. Reference numeral 11 in FIG. 1 is a regenerative pump as a direction variable pump in which an internal rotating body is selectively rotated in either forward or reverse directions by a motor 12, and is the same as that described in FIG. A pair of inlet / outlet ports 11a having a structure, in which the relationship between the suction side and the discharge side is symmetrically switched depending on the rotation direction of the rotating body,
11b has been established. Reference numeral 13 is a water supply storage tank as a fluid supply source, and water is replenished at any time.

From the water supply storage tank 13, the first water supply pipe 1
4 and a second water supply pipe 15 extend in parallel with each other, and the first water supply pipe 14 has a suction valve V ₁ on the upstream side.
And the discharge valve V ₂ on the downstream side are arranged in series, and similarly, the intake valve V ₃ on the upstream side and the discharge valve V ₄ on the downstream side are arranged in series in the second water supply pipe 15. These intake valves V ₁ ,
The V ₃ and the discharge valves V ₂ and V ₄ are opened when the upstream side of the valve becomes relatively higher in pressure than the downstream side and a pressure difference of a predetermined value or more occurs, and the flow from the water supply storage tank 13 side. It has a non-return valve structure that allows only the above. Regeneration pump 1
One of the inlet / outlet port 11a is connected to a position between the intake valve V ₁ and the discharge valve V ₂ in the first water supply pipe 14, and the other inlet / outlet port 11b is connected to the intake valve V ₁ in the second water supply pipe 15. It is connected to a position between ₃ and the discharge valve V ₄ .

In the above structure, for example, the regeneration pump 1
When 1 rotates in the forward direction, the inlet / outlet port 11a connected to the first water supply pipe 14 becomes the suction side, and the inlet / outlet port 11b connected to the second water supply pipe 15 becomes the discharge side. On the one water supply pipe 14, the suction valve V ₁ is opened because the downstream side becomes low pressure due to the suction pressure from the inlet / outlet port 11 a of the regeneration pump 11 and the upstream side becomes relatively high pressure, and the discharge valve V 1 is opened. No. ₂ is closed because its upstream side receives the suction pressure and becomes a low pressure. Further, on the second water supply pipe 15, the suction valve V ₃ is closed because the downstream side thereof becomes high pressure due to the discharge pressure from the inlet / outlet port 11b of the regeneration pump 11 and the upstream side becomes relatively low pressure. The discharge valve V ₄ is opened because its upstream side receives the discharge pressure and has a high pressure. Therefore, the water in the water supply storage tank 13 is sucked into the inlet / outlet port 11a of the regeneration pump 11 from the first water supply pipe 14 via the inlet valve V ₁ , and further, from the inlet / outlet port 11b of the regeneration pump 11 to the discharge valve V 1.
_It is discharged to the second water supply pipe 15 via ₄ .

Further, the regenerative pump 11 is driven in the reverse direction so that the inlet / outlet port 1 connected to the first water supply pipe 14 is connected.
When 1a is on the discharge side and the inlet / outlet port 11b connected to the second water supply pipe 15 is on the suction side, a pressure relationship opposite to that described above is established. The valve V ₁ is closed and the discharge valve V ₂ is opened,
On the second water supply pipe 15, the suction valve V ₃ is opened and the discharge valve V ₄ is closed and opened. Therefore, the water in the water supply storage tank 13 flows from the second water supply pipe 15 to the intake valve V ₃
Through the inlet / outlet port 11b of the regeneration pump 11 and further discharged from the inlet / outlet port 11a of the regeneration pump 11 to the first water supply pipe 14 via the discharge valve V ₂ .

That is, according to this embodiment, the intake valves V ₁ and V ₃ are caused by the pressure relationship between the inlet / outlet port 11a side and the inlet / outlet port 11b side associated with the forward and reverse rotations of the regeneration pump 11.
Also, the discharge valves V ₂ and V ₄ are automatically opened and closed, and the water discharge path is selectively switched to the first water supply pipe 14 or the second water supply pipe 15. In addition, in this embodiment, instead of the regeneration pump 11, another directional variable pump,
For example, a gear pump or a vane pump can be used.

FIG. 2 schematically shows a second embodiment of the fluid discharge device according to the present invention, and reference numeral 16 is a regenerative pump. This regeneration pump 16 is a housing 16
1 and discharge ports 164 and 165 are formed at both ends of the pump flow path 163 along the circumference between the rotor 1 and the rotating body 162 which is disposed in the housing 161 and is rotated in the normal direction by a motor (not shown). The suction port 166 is opened at an intermediate position of the pump channel 163.
First and second water supply pipes 17 and 18 extend from the discharge ports 164 and 165, and a discharge valve V is provided in the first water supply pipe 17.
₅ and the discharge valve V ₆ is arranged in the second water supply pipe 18. The discharge valves V ₅ and V ₆ are opened when the upstream side of the valves is relatively higher in pressure than the downstream side and a pressure difference of a predetermined value or more is generated, as in the embodiment of FIG. 1 described above. It has a check valve structure that is valved.

In the second embodiment, when the rotating body 162 of the regeneration pump 16 rotates, for example, in the normal direction (counterclockwise direction in the drawing), the water introduced into the pump flow passage 163 has a rotating body. Friction with 162 provides pump pressure. The pump pressure is the pump flow path 16
3 has a pressure gradient such that the discharge port 164 side at the end portion in the direction opposite to the rotation direction of the rotating body 162 has a low pressure and the discharge port 165 side at the end portion in the forward direction has a high pressure. Therefore, the discharge valve V ₅ is closed because the upstream discharge port 164 side has a low pressure, and the discharge valve V ₆ is opened when the upstream discharge port 165 side has a high pressure. On the other hand, since the suction port 166 that is always open has a relatively lower pressure than the discharge port 165 side, the suction port 166 is sucked from the inside of the water supply storage tank 13 into the pump passage 163 of the regeneration pump 16 through the suction port 166. Water is discharged from the discharge port 165 to the second water supply pipe 18 via the discharge valve V ₆ .

On the contrary, when the rotating body 162 rotates in the reverse direction (clockwise direction in the figure), the water in the pump passage 163 becomes a forward end portion with respect to the rotating direction by the same action as described above. Pump pressure having a pressure gradient such that the discharge port 164 side has a high pressure and the discharge port 165 side that is the opposite end has a low pressure is applied. Therefore, the discharge valve V ₅ is opened, the discharge valve V ₆ is closed, and the water sucked into the pump flow path 163 of the regeneration pump 16 from the inside of the water supply storage tank 13 through the suction port 166 is discharged from the discharge port 164. It is discharged to the first water supply pipe 17 via V ₅ .

In the embodiment described above, the rotating body 162
Is constant, the pressure difference between the suction side and the discharge side, which is given to the water in the pump passage 163 by the friction with the rotating body 162, is discharged after being sucked into the pump passage 163. The longer the flow path is, the larger it becomes. Therefore, as shown in FIG. 3, if the suction port 166 of the regeneration pump 16 is provided so as to be unevenly distributed from the circumferential center of the pump flow path 163 to the one discharge port 164 side, the rotating body 162 can be provided.
Is rotated in the normal rotation direction (counterclockwise direction in the figure), the discharge pressure given in the process until the water sucked from the suction port 166 to the pump flow path 163 is discharged from the discharge port 165 is By the rotation of 162 in the reverse direction (clockwise direction in the figure), the water sucked from the suction port 166 into the pump passage 163 becomes larger than the discharge pressure given in the process of being discharged from the discharge port 164. Therefore, for example, different water supply pressures can be set for the anus washing nozzle and the bidet nozzle.

FIG. 4 schematically shows a test condition for confirming the change of the discharge pressure due to the difference in the opening position of the suction port 166 with respect to the pump flow path 163. A suction port 166A facing the central portion in the circumferential direction of the passage 163, and a suction port 166B facing a position eccentrically located on one discharge port 164 side.
And a suction port 166C facing a position unevenly distributed to the other discharge port 165 side is opened, and these suction ports 166A to 166C are opened by valve devices (not shown).
Any one of them can be selectively opened.

FIG. 5 shows the results of the above test based on the discharge pressure P and the flow rate Q.
It is shown in the relationship with. That is, the regeneration pump 16
In the normal rotation drive of the rotating body 162, the water is discharged from the discharge port 165 as described above, but FIG.
As shown in FIG. 5, the discharge pressure is a suction port 166 unevenly distributed on the discharge port 164 side closed by the discharge valve V ₅ .
It was confirmed that it was the largest when B was opened and the smallest when the suction port 166C on the opposite side was opened. Further, when the rotating body 162 is driven in the reverse direction, water is discharged from the discharge port 164, but as shown in FIG. 5B, the discharge pressure is to the discharge port 165 side closed by the discharge valve V ₆ . Largest when the unevenly distributed suction port 166C is opened, and the suction port 166 on the opposite side is the largest.
It was confirmed to be the smallest when B was opened. Further, when the central suction port 166A was opened, the discharge pressure from the discharge port 165 by the normal rotation drive was the same as the discharge pressure from the discharge port 164 by the reverse rotation drive.

The fluid discharge device of the present invention is not limited to the one for supplying water as described above, but is applicable to, for example, a hydraulic device.

[0025]

According to the fluid discharge device of the present invention, the following effects are realized. (1) Since the positional relationship between the suction side and the discharge side is reversed due to the forward and reverse drive of the pump, the valve is automatically opened and closed, and the fluid discharge path is selectively switched. In addition to the pump drive system, a drive system for the valve is not required, and the control system of the device can be simplified. (2) Different discharge pressures can be set in both discharge paths depending on the position of the suction port of the regeneration pump.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing a first embodiment of a fluid ejection device according to the present invention.

FIG. 2 is an explanatory view schematically showing a second embodiment of a fluid ejection device according to the present invention.

FIG. 3 is an explanatory diagram showing an example in which the suction port of the regeneration pump in the second embodiment is unevenly distributed from the center in the circumferential direction of the pump flow path to one discharge port side.

FIG. 4 is an explanatory view schematically showing a test situation for confirming a change in discharge pressure due to a difference in opening position of the suction port in the second embodiment.

FIG. 5 is an explanatory diagram showing the test results.

FIG. 6 is an explanatory view schematically showing a conventional fluid ejection device.

FIG. 7 is an explanatory view schematically showing a regeneration pump in a conventional fluid discharge device.

[Explanation of symbols]

11 Regeneration Pump (Variable Direction Pump) 11a, 11b Inlet / Out Port 13 Water Supply Storage Tank (Fluid Supply Source) 14,17 First Water Supply Pipe (First Pipe) 15,18 Second Water Supply Pipe (Second Pipe) 16 regenerative pump 162 rotator 163 pump channel 164, 165 discharge port 166 suction port V _1, V ₃ intake valves V _2, V ₄ ~V ₆ discharge valve

Claims (3)

[Claims] 1. A pair of inlet / outlet ports at which the relationship between the suction side and the discharge side is symmetrically switched according to the forward / reverse rotation of the rotating body at both ends of a pump flow path along the outer circumference of the rotating body capable of rotating in the forward / reverse direction. The directional variable pump opened, the first and second pipes extending in parallel from the fluid supply source, and the first and second pipes provided in series with each other from the fluid supply source side. An intake valve on the upstream side and a discharge valve on the downstream side that allow only flow, and each inlet / outlet port of the directional variable pump is between the intake valve and the discharge valve in the first pipe and in the second pipe. A fluid discharge device, characterized in that it is connected between an intake valve and a discharge valve. 2. A regenerative pump in which a pair of discharge ports are formed at both ends of a pump passage along the outer circumference of a rotating body capable of rotating in the normal and reverse directions, and an intake port is opened in the middle of the pump passage, and each of the discharge pumps. And a discharge valve which is provided in a discharge path extending from the port and allows only a flow to the downstream side. 3. The fluid discharge device according to claim 2, wherein the suction port of the regeneration pump is provided so as to be unevenly distributed from the center in the circumferential direction of the pump passage toward one of the discharge ports.