JPS5910838B2 - Washing machine with water pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine equipped with a water supply pump that supplies water from a separately provided water supply source to a washing tub. The purpose of the present invention is to provide a washing machine with a water supply pump that can perform the following tasks.

Conventionally, it has been considered to add a water supply pump to a washing machine to supply water from the water supply source to the washing tub, but the piping system for this is built into the washing machine, as shown in Figure 3. An auxiliary tank 22 was connected to the suction port side of the water supply pump 21, one end of a water supply hose 23 was connected to the auxiliary tank 22, and the other end of the water supply hose 23 was inserted into a water supply source 24.

Further, a discharge hose 25 is connected to the discharge port side of the water supply pump 21, and a three-pronged pipe 27 is provided at the lower part of the washing tub 26, and the three-pronged pipe 27 is connected to the discharge hose 25 and the drain cock 2.
A drain hose 29 having a diameter of 8 was connected.

In the above configuration, when water is supplied from the water supply source 24 into the washing tub 26, if there is air in the piping system, water cannot be sucked in from the water supply source 24 even if the water supply pump 21 is activated. It is necessary to fill the water supply pump 21 with water, and therefore, the piping path and the water supply pump 21 are filled by priming the washing tub 26 with water.

In this case, the height H of the water supply hose 23 needs to take into consideration various heights depending on household circumstances, and even if the washing tub 26 is primed with water, there is still air inside the water supply hose 23. must be taken into account.

To avoid this, it was necessary to provide an auxiliary tank 22 with a volume larger than the total volume inside the water supply hose 23.

When the water supply pump 21 operates and starts supplying water, the water in the auxiliary tank 22 is sucked in, and as a result, the pressure inside the auxiliary tank 22 becomes negative, and the inside of the water supply hose 23 also becomes negative pressure.
, water is sucked in from the water supply source 24.

When a specified amount of water is supplied into the washing tub 26, the water supply is stopped and washing begins.

When the washing is finished, open the drain cock 28,
The water in the washing tub 26 is drained out of the washing machine by turning on the drain hose 29, but in this case, since the piping is full of water, the siphon phenomenon is regenerated, and this siphon phenomenon causes the three-pronged pipe 27 to drain. In some cases, the water in the discharge hose 25, the water supply pump 21, and the auxiliary tank 22 would flow out.

If the water in the auxiliary tank 22 flows out due to a siphon phenomenon under the condition of height H between the water supply hose 23 and the water supply source 24, for example, when the water supply hose 23 is inserted into the water supply source 24, the water supply hose 23 became negative pressure, all of the water in the fruit stuffing auxiliary tank 22 did not flow out, and under the condition of height H, the amount of water flowing out varied.

Furthermore, if the amount of remaining water in the auxiliary tank 22 is smaller than the total volume of air in the water supply hose 23, when the water supply pump 21 is activated when water is supplied into the washing tub 26 for the second time, air will be sucked in along with the water. The water supply performance deteriorated significantly, and as a result, it took a very long time to reach the specified water level in the washing tub 26. Therefore, it was necessary to prime the washing tub 26 every time, even after the second time. there were.

The present invention was developed in view of the above-mentioned conventional problems, and even if there are variations in the height H of the water supply source and the water supply hose, it is possible to always obtain a constant water supply efficiency, and there is no priming after the second time. The purpose is to provide a washing machine with a water pump that does not require a water supply pump.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a three-pronged pipe connected to the lower drain port 3 of the 1/I′i washing tub 2, a drain hose connected to one side of the three-pronged pipe 1 and having a drainage pot 5, and a drain hose connected to one of the three-pronged pipes 1 and 6, the three-pronged pipe 1
The other hose is connected to the discharge port 7a of the water supply pump 7, and this hose is branched into two hoses 6a and 6b, and the two hoses 6876b are connected by a trifurcated pipe 8.

9 is an auxiliary tank connected to the suction port 7b of the water supply pump 7; 10 is a water supply hose whose one end is connected to the auxiliary tank 9 and whose other end is inserted into the water supply source 11; and 12 is connected to the trifurcated pipe 8. with an air hose with an open end.
The air hose 12 can also be easily connected by using the trifurcated tube 8.

To explain the operation in the above configuration, the first water supply source 11
When supplying water to the washing tub 2, first fill the washing tub 2 with priming water, then the auxiliary tank 9 and the water supply pump 7.
, the two hoses 6a and 6b are filled with water.

Thereafter, the water supply pump 7 is activated to supply water to the specified water level in the washing tub 2, and washing begins.

When the washing is finished, the drain cock 5 is opened and the water in the washing tub 2 is drained out of the washing machine via the three-pronged pipe 1 and the drain hose 4. In this case, two hoses 6a and 6b are used.
Since the trigeminal tube 8 is filled with water, a siphon phenomenon occurs, and this siphon phenomenon also generates a flow velocity in the trigeminal tube 1, and as a result, the water level in the air hose 12 decreases according to Bernoulli's theorem. Therefore, air is sucked into the trigeminal tube 8.

This stops the siphon phenomenon.

Therefore, the water in the auxiliary tank 9 does not decrease and is always maintained at a constant amount.

If the volume of the auxiliary tank 9 is set so that this constant amount of water is greater than the amount of air in the water supply hose 10, even if there is a variation in the height H of the water supply source 11 and the water supply hose 10, the water supply Since no air is sucked into the pump 7 and the water supply pump 7 is always filled with water, a constant water supply efficiency can be obtained.

Furthermore, even when water is supplied for the second time and thereafter, there is no need to prime water since the auxiliary tank 9 is always filled with water.

FIG. 2 shows another embodiment of the present invention, which differs from FIG. 1 in that a check valve 13 is provided close to the connection between the trifurcated pipe 8 and the air hose 12.

This check valve 13 is closed by the discharge pressure when water is supplied into the washing tub 2, but when the washing tub 2 is drained, a flow velocity is generated in the trifurcated pipe 1 due to the siphon phenomenon, so Bernoulli's According to the theorem, the pressure in the check valve 13 decreases, and as a result, the check valve 13 is opened and outside air is sucked in through the air hose 12.

This stops the siphon phenomenon. Therefore, the water in the auxiliary tank 9 does not decrease and is always maintained at a constant amount.

In this embodiment, since the check valve 13 is provided,
This check valve 1 is activated by the discharge pressure applied to the three-pronged pipe 8 during water supply.
3 will be blocked, so air hose 1
It is also possible to prevent water from entering into the interior of the device.

As is clear from the above embodiments, according to the present invention, the hose connected between the other side of the three-pronged pipe connected to the lower drainage port of the washing tub and the discharge port of the water supply pump has an open tip. In addition to connecting the air hose, the volume of the auxiliary tank is set so that when the water in the washing tub is drained, the amount of water remaining in the auxiliary tank is greater than the amount of air in the water supply hose. The siphon phenomenon caused by water can be stopped quickly, and therefore a constant amount of water can always be maintained in the auxiliary tank.As a result, even if there are variations in the height H of the water supply source and the water supply hose, It is possible to obtain a water supply efficiency of 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.

[Brief explanation of drawings]

Fig. 1 is a piping diagram of a washing machine with a water supply pump that shows one embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view of main parts showing another embodiment of the invention, and Fig. 3 is a conventional washing machine with a water supply pump. It is a piping diagram of a washing machine. 1...Three-pronged pipe, 2...Washing tub, 3...Drain port, 4
... Drain hose, 5... Drain cock, 6, 6a, 6
b...Hose, 7, Water supply pump, 8...Three-pronged pipe, 9
...Auxiliary tank, 10...Water supply hose, 11...
Water supply source, 12...air hose, 13...reverse valve.

Claims (1)

[Scope of Claims] 1. A three-pronged pipe connected to a lower drainage port of a washing tub, a drain hose connected to one of the three-pronged pipe and having a drain cock, the other of the three-pronged pipe and a discharge port of a water supply pump. , an auxiliary tank connected to the suction port of the water supply pump, and a water supply hose having one end connected to the auxiliary tank and the other end inserted into a water supply source,
An air hose with an open end is connected in the middle of the hose connected between the other side of the three-pronged pipe and the discharge port of the water supply pump, and an air hose with an open end is connected in the middle of the hose connected between the other side of the three-pronged pipe and the discharge port of the water supply pump. A washing machine with a water supply pump, characterized in that the volume of the auxiliary tank is set so that the amount of air in the water supply hose is greater than the amount of air in the water supply hose. 2. Divide the hose connected between the other side of the three-pronged pipe and the discharge port of the water supply pump into two parts, connect the three-pronged pipe in the middle, and connect an air hose with an open end to this tri-pronged pipe. A washing machine with a water supply pump according to claim 1. 3. A washing machine with a water supply pump according to claim 2, characterized in that a check valve is provided adjacent to the connecting portion between the trifurcated pipe and the air hose.