JPH0141781B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention mainly relates to a hot water washer for cleaning the anus and the like after defecating in a toilet.

Conventional configuration and its problems A conventional example is shown in FIG.

In Figure 1, LT is a low tank for a flush toilet installed in the toilet, and normally the water level is at position a as shown in the diagram. Take in water from this low tank LT. J
is the suction pipe connection port, V is the opening/closing solenoid valve, P is the vane pump, PO is the discharge pipe, HT is the hot water tank, H
is a heater that boils water, and N is a nozzle that cleans the anus and the like. Then, when the on-off solenoid valve V is opened and the vane pump P is activated, water is taken in from the low tank LT via the filter F, the suction pipe PS, the suction pipe connection J, the on-off solenoid valve V, and the discharge pipe PO.
is discharged from the hot water tank HT to the bottom of the heater H.
The heated water becomes hot water and is ejected through the nozzle pipe PN and nozzle N attached to the top of the hot water tank HT. The ejected flow rate can be adjusted by changing the rotation speed of the vane pump P.

The problem with the conventional example, as mentioned above, is that it requires an expensive self-priming pump such as the vane pump P, which is manufactured with extremely high precision. I will now explain this in a little more detail.

Consider the case where the water supply is cut off after the normal state shown in Figure 1. If the water supply is cut off, if you use the toilet and operate the flush lever (not shown) of the Low Tank LT, the water in the Low Tank LT will flow into the toilet bowl and the water in the Low Tank LT will become empty. If a washer is used at this time, at least the water channel on the upstream side of the vane pump P, that is, from the filter F to the vane pump P.
The water in the canal will disappear. Next, when the water supply interruption is resolved, water is automatically supplied to the low tank LT, and the water level in the low tank LT becomes position a. Naturally, once the water supply interruption has been resolved and things are back to normal, flush toilets and washing machines must be able to be used normally. However, there is no water in the water channel from filter F to pump P in the low tank LT, and the suction pipe PS has a rising part A that is created by climbing over the side wall of the low tank LT, so there is no water in the pump P. Even without a pump, it is necessary to have the ability to suck the water in the low tank LT over the rising part A (called self-priming), and as mentioned above, it is necessary to use an expensive pump.

Purpose of the Invention The purpose of the present invention is to solve the problems of the conventional example described above. To provide a washing machine that can be used normally after the water outage is resolved, even if the water outage temporarily occurs as explained in the section on problems with the conventional example.

Structure of the Invention In order to achieve the above object, the present invention includes: a hot water tank for producing and storing hot water; a nozzle for spouting hot water led from the hot water tank; A pump that supplies and pressurizes water, a return waterway that returns part of the water sent out by the pump to the inlet side of the pump, and a flow rate that is located in the middle of the return waterway and adjusts the flow rate through the return waterway. This configuration includes a control valve and an on-off valve located upstream of the pump to open and close the waterway.

DESCRIPTION OF EMBODIMENTS FIG. 2 shows an embodiment of the present invention. Incidentally, the same reference numerals are used for the same members as in FIG. 1 of the conventional example, and description thereof will be omitted or simplified.

In Fig. 2, P' is a centrifugal pump installed below the hot water tank HT', PB is a return waterway, and FV is a flow rate control valve. A water inlet A is provided at the top of the hot water tank HT' and is closed by a stopper B.

Next, the effect will be explained. First, in the normal case, that is, when water is filled from the suction pipe PS to the hot water tank HT', when the on-off valve V is opened and the centrifugal pump P' is activated, water is sucked from the low tank LT through the filter F. The water is discharged into the hot water tank HT', heated to an appropriate temperature by the heater H, and ejected from the nozzle N through the nozzle pipe PN. If flow control valve FV is closed at this time, return waterway PB
The flow rate of is 0 and the centrifugal pump P′ is connected to the hot water tank.
The flow rate Qi discharged to HT' is equal to the flow rate Qo ejected from the nozzle N, but when the flow rate control valve FV is at an arbitrary opening degree, the flow rate Qb flows into the return waterway PB as shown by the dotted line arrow in the figure, and the flow rate Qb flows through the nozzle N. flow rate ejected from
Qo becomes Qo=Qi−Qb. Therefore, flow control valve FV
By adjusting the amount of water ejected from the nozzle N, the cleaning strength of the washer can be adjusted.

Next, the case of temporary water outage mentioned in the section on problems with the conventional example will be explained.

If you use the washer when the water supply is cut off and the water in the low tank LT is empty, at least the water in the suction pipe PS will be empty, and the water channel in and near the centrifugal pump P' will be filled with some water. Air is mixed in, and the hot water in the hot water tank HT' cannot be pressurized, and the jetting of hot water from the nozzle N stops. The use of the washing machine is therefore stopped. At this time, the operations of the flow control valve FV, the centrifugal pump P', and the on-off valve V are linked (not shown), and the flow control valve FV is fully opened, the centrifugal pump P' is stopped, and the on-off valve is closed. . Therefore, when the washer is stopped, the hot water in the tank HT' descends, and at least the inside of the centrifugal pump P' and the return waterway PB are filled with hot water. Next, when the washer is operated, that is, with the flow rate control valve FV fully open or slightly throttled, the centrifugal pump P' operates, and the on-off valve V
When the pump is opened, the centrifugal pump P′ is filled with water, so the centrifugal pump P′ operates normally, and as is well known, a pressure difference is created between the inlet side and the discharge side, and the hot water tank
The hot water accumulated in the centrifugal pump P' and the piping near it is discharged to the HT', and at the same time the return water is discharged into the return waterway PB.
As shown by the dotted line arrow, the hot water tank
Hot water is sucked in from HT′ to form a circulation circuit. At this time, the pipe resistance of the return waterway PB including the flow rate control valve FV is due to the pressure (negative pressure) on the inlet side of the centrifugal pump P', which causes water to overcome the rising part A of the suction pipe PS in the low tank LT. It is designed to create sufficient pressure, and for a while the centrifugal pump P′ circulates hot water through the return circuit PB while sucking in the air in the suction pipe PS, sucking in the water from the low tank LT, and eventually all Air is exhausted from above the hot water tank HT′ and normal operation returns.

Next, during the first installation, that is, the hot water tank.
The state where HT′ is also empty will be explained. Generally, a hot water washer for a toilet is installed in the toilet bowl by a contractor. At this time, the plug B of the water inlet A provided at the top of the hot water tank HT' is removed, a small amount of water is injected, and the water inlet A is sealed again with the plug B. It can be used normally with the same effect as when the water is cut off.

As described above, the effect of one embodiment of the present invention is that an inexpensive centrifugal pump without self-priming can be used as a pump for a hot water washer for a toilet, and an inexpensive washer can be realized.

Effects of the invention (1) It is possible to use an inexpensive non-self-priming pump that has a simple structure and does not require manufacturing precision for the pump of a toilet hot water washer that takes water from a low tank or the like to clean the anus, etc., and is inexpensive. We can provide the best cleaning machines.

(2) Since the flow rate of hot water spouted from the nozzle can be adjusted using a flow rate control valve, it is much cheaper than the conventional method of adjusting the pump rotation speed.

(3) By pouring a small amount of water through the water inlet provided in the hot water tank, it is easy to start up the system at the time of installation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional toilet hot water washer, and FIG. 2 is a block diagram showing a toilet hot water washer according to an embodiment of the present invention. N...Nozzle, H...Heater, HT'...Hot water tank, P'...Pump, PB...Return waterway, FV...
Flow rate control valve, V...Opening/closing valve, A...Water inlet, B...
…plug.

Claims (1)

[Claims] 1 A nozzle that spouts hot water, a hot water tank that creates and stores hot water, a pump located below the hot water tank that supplies water under pressure to the hot water tank, and a part of the water sent out by this pump that A toilet equipped with a return waterway that returns to the inlet side of the pump, a flow rate control valve that is located in the middle of the return waterway and that adjusts the flow rate flowing through the return waterway, and an on-off valve that is located upstream of the pump and that opens and closes the waterway. Hot water washing machine.