KR20070074084A - Structure for preventing reverse water pressure of washing machine - Google Patents

Abstract

A structure for preventing a reverse water pressure of a washing machine is provided to prevent a counter current of the polluted washing water in a tub. A structure for preventing a reverse water pressure of a washing machine includes a tub(102), a drum(103), a steam generator(200), a water supply device(150), and a counter current prevention tool. The tub is inside a body(100). The drum is rotatively installed in the tub. The steam generator supplies a steam to an inside of the drum. The water supply device supplies water to the steam generator. The counter current prevention tool prevents a counter current of washing water in the tub. The water supply device is composed of a plurality of valves. The steam generator includes a case and a heater. The case includes a space for storing water. The heater heats water in the case.

Description

Structure for preventing reverse water pressure of washing machine

1 is a perspective view schematically showing the structure of a conventional drum washing machine

Figure 2 is a cross-sectional view schematically showing the structure of a conventional steam generator

3 is a perspective view schematically showing the structure of a drum washing machine according to a preferred embodiment of the present invention

Figure 4 is a cross-sectional view showing a state in which the back pressure check valve is installed in the water supply port of the steam generator according to an embodiment of the present invention

Figure 5 is a perspective view showing the structure of the back pressure check valve according to a preferred embodiment of the present invention

Figure 6a, b is a functional diagram showing the action of the back pressure check valve in accordance with a preferred embodiment of the present invention.

** Names of symbols on the main parts of the drawings **

100: main body 102: tub

103: drum 150: water supply

200: steam generator 250: water supply pipe

251: water supply port 270: steam discharge pipe

271: steam outlet 500: back pressure check valve

510: body portion 530: inlet portion

531: inlet 550: flow preventing protrusion

The present invention relates to a laundry machine, and more particularly, to a back pressure preventing structure of the laundry machine for preventing the washing water in the tub of the drum washing machine back to the water supply device side.

In general, the washing machine of the washing machine is a pulsator type washing machine of washing method by the flow of water generated by rotating the plate-type pulsator, and the washing water and laundry supplied to the drum as the lying drum is rotated. It is divided into a drum washing machine that washes using free fall and friction.

Among them, the drum washing machine is less tangle than the pulsator type washing machine, and the demand of the user is rapidly increased due to the small amount of washing water and detergent required for the washing administration.

However, in the above-described drum washing machine, a soaking process is performed to make the laundry more clean. At this time, there is a problem that a lot of washing water is required and a separate structure for sterilizing laundry in the drum washing machine is not provided.

Of course, in recent years, a separate washing water heater for heating the washing water is also provided in the washing machine so that the structure is made to be boiled washing is not preferred due to the excessive amount of washing water and power required to boil.

Hereinafter, referring to FIG. 1, a drum washing machine equipped with a steam generator that supplements the aforementioned drum washing machine will be described.

As can be seen from Figure 1, the drum washing machine 100, a cylindrical tub 102 installed in the main body 100 to store the wash water, and a drum rotatably installed in the tub 102 ( 103, a drive motor (not shown) for driving the drum 103, and at least one steam generator 200 for supplying steam into the drum 103.

At this time, one side of the main body 100 is connected to an external water pipe (not shown) and the like to supply washing water in the tub 102 and a plurality of valves 151 for supplying water to the steam generator 200. Is provided with a water supply device (150).

On the other hand, one side of the steam generator 200 is formed with a water supply port 251 is connected to the water supply pipe 250 provided to guide the water into the steam generator 200, the steam generator 200 On the other side, a steam discharge port 271 connected to the steam supply pipe 270 provided to guide the steam into the drum 103 is formed.

In this case, one end of the steam supply pipe 270 is preferably formed in the shape of a nozzle so that the steam can be smoothly injected into the internal space of the drum 103, the end of the steam discharge is the drum 103 It is preferable to be installed to expose the inside of.

Referring to Figure 2, the structure of the conventional steam generator 200 provided in the above-described drum washing machine will be described.

As illustrated in FIG. 2, the steam generator 200 may include a case 201 forming an appearance and forming a space for storing water, and detecting a level of water stored in the case 201. Water level sensor 205 for, a heater 203 for heating the water stored in the case 201, and a temperature sensor for measuring the temperature of the water and steam heated by the heater 203 ( 207 is installed.

Referring to the operation of the above-described steam generator is as follows.

First, the water supplied from the water supply device 150 is supplied with the guide of the water supply pipe 250 into the case 201 of the steam generator 200 and the water level sensor 205 detects this and adjusts the appropriate water level. .

Next, the water supplied is heated by the heater 203 installed inside the case 201 and steam is generated while the heated water boils.

At this time, the temperature sensor 207 is to maintain the proper temperature of the water supplied to the case 201.

Next, the generated steam is discharged to the steam discharge port 271 of the steam generating device 200, the discharged steam is discharged into the drum 103 under the guidance of the steam supply pipe 270 is provided as a laundry. .

However, the drum washing machine 100 described above has the following problems.

Conventional drum washing machines reversely pressurize water in a pipeline to clean external water pipes, for example, when external water pipes (not shown) are jointly managed in a public apartment. If a negative pressure is applied through the water supply pipe 250 connected to an external water pipe while the washing water is full in the tub 102 due to a failure of the drum washing machine, the water inside the drum washing machine may be used to drain the water supply path. Phenomenon occurs to escape through.

That is, if the reverse water pressure is not released and is delivered to the tub 102 as it is, the wash water filled in the tub 102 is steam supply pipe 270 ⇒ steam generator 200 ⇒ water supply pipe 250 ⇒ water supply device 150 Reverse flow through) is discharged to the external water pipe (not shown).

As a result, when the wash water contaminated by washing or the like flows back to the external water pipe, a problem occurs that the clean water on the external water pipe is contaminated by the backwashed water.

The present invention has been made in order to solve the above problems, the washing water in the tub is flowed back through the steam generator and the water supply to the external water pipe side when the reverse water pressure is applied to the external water pipe when an abnormal condition of the drum washing machine of the present invention occurs The purpose is to prevent the phenomenon.

In order to achieve the above object, a drum rotatably installed in the tub; A water supply port, which is a passage through which water is supplied, and a steam discharge port through which steam is discharged, and a steam generator that heats the water supplied to generate steam; A water supply pipe connecting the water supply port and a water supply device to guide water from the water supply device to the steam generator; A steam supply pipe connecting the steam discharge port and the drum to guide the steam generated by the steam generator to the drum; And, it is provided on the water supply line to the wash water is supplied to the back of the washing machine to prevent the washing water in the tub back to the water supply valve side through the steam generating device: to provide a back pressure preventing structure of the washing apparatus consisting of.

It is characterized in that the non-return valve made of a structure that is opened by the water pressure in the state in which the water is supplied through the water supply device, and closed in the state in which the wash water in the tub flows back to the water supply device.

On the other hand, the non-return valve is preferably installed in the water supply port of the steam generator.

The non-return valve may include an inlet portion which forms an exterior and is inserted into the water inlet and is fixed to the water inlet, and an inlet portion is opened by the water pressure which is formed to protrude toward one side of the washing water from the one end of the body portion. have.

At this time, the inlet portion is preferably formed in a wedge shape.

On the other hand, the non-return valve may be formed on the other end of the body portion, is formed to be caught on the end of the water inlet further comprises a flow preventing projection for preventing the non-return valve flows into the steam generator.

The non-return valve may be formed of any one of rubber or silicone material having elastic force.

Therefore, the present invention can prevent the phenomenon in which the washing water in the tub flows back to the water supply device through the steam generator by being provided with a back pressure preventing means at the water supply port of the steam generator.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention that can specifically realize the above object will be described. For reference, before describing the present embodiment, the same name and the same reference numerals are used for the same configuration as the conventional configuration, and additional descriptions thereof will be omitted.

3 is a perspective view schematically illustrating a structure of a drum washing machine according to a preferred embodiment of the present invention, and FIG. 4 is a state in which a back pressure check valve is installed at a water supply port of a steam generator according to a preferred embodiment of the present invention. It is sectional drawing shown.

And, Figure 5 is a perspective view showing the structure of the back pressure check valve according to a preferred embodiment of the present invention, Figure 6a, b is a functional diagram showing the action of the back pressure check valve according to a preferred embodiment of the present invention. 6A illustrates a state in which water is supplied through the back pressure check valve, and FIG. 6B illustrates a state in which washing water does not flow back to the back pressure check valve.

As can be seen through Figures 3 to 6, the structure for preventing the back pressure of the drum washing machine according to an embodiment of the present invention is largely rotatable in the tub 102 and the tub 102 installed inside the main body 100 The drum 103, a steam generator 200 for supplying steam to the drum 103, a water supply device 150 for supplying water to the steam generator 200, and a tub 102. It includes a backflow prevention means for preventing the backwash of the water.

Here, the water supply device 150 is installed inside the main body 100, consists of a plurality of valves 151 is connected to an external water pipe (not shown) or the like to supply water to the steam generator 200 or tub ( 102) serves to water the wash water.

As illustrated in FIG. 4, the steam generator 200 according to the present embodiment may include a case 201 having an appearance and a space for storing water, and a heater for heating water stored in the case 201. It may include a heater 203.

The case 201 has a water supply port 251 connected to a water supply pipe 250 provided to guide water of the water supply device 150 into the case 201 on one side thereof, and the other side of the case 201 is generated. A steam discharge port 271 connected to the steam supply pipe 270 provided to supply the steam to the drum 103 is formed.

The heater 203 is installed at the bottom of the case 101, and when water is supplied to the case 101, the heater 203 serves to directly change the water to steam while completely submerged in the water.

On the other hand, the heater 203 may use a coil heater for heating the water stored therein from the outside of the case 101, but the sheath heater for heating directly in a state completely submerged in the stored water has a thermal efficiency It is suitable for boiling water in high and short time.

 On one side of the case 101, a water level sensor 205 for detecting the level of water stored therein, and a temperature sensor 207 for measuring the temperature of water and steam heated by the heater 203 Is installed.

In addition, the temperature sensor 207 measures the temperature of the steam generated in the case 101 and when the temperature is higher than the reference value to cut off the power of the heater 203 to overheat the heater 203 prevent.

In addition, the water level sensor 205 measures the level of water supplied to the case 101, so that the amount of water supplied is always maintained at an appropriate level.

That is, when the water level of the water supplied to the case 101 is lower than the reference value, the valve 151 of the water supply device is opened to supplement the water, and when the water level of the water supplied to the inside is higher than the reference value, the valve ( 151 is cut off to stop the water supply and operate the heater 203 to generate steam.

As mentioned above, the countercurrent prevention means serves to prevent the contaminated washing water in the tub 102 from flowing back to the water supply device 150 through the steam generator 200.

The backflow preventing means according to an embodiment of the present invention has a structure in which the washing water is opened by water pressure in a state in which water is supplied through the water supply device 150 and closed in a state in which the wash water is flowed back to the water supply device 150. It characterized in that the non-return valve 500 made of.

At this time, the non-return valve 500 may be installed on the water supply line for supplying water to the steam generator 200 through the water supply device 150, as shown in FIG. In the embodiment, the water supply pipe 250 is installed in the water supply port 251 of the steam generator 200 is connected.

As shown in FIG. 5, the non-return valve 500 forms an exterior and is inserted into and fixed to the water inlet 251 and wash water is supplied from one end of the body portion 510. And an inlet 530 having an inlet 531 which is formed to protrude in a direction and is opened by water pressure supplied thereto.

In this case, the inlet 530 is preferably formed in a wedge shape, which is to facilitate the operation of opening and closing the inlet 531 of the inlet part on the water inlet 251.

Accordingly, the non-return valve 500 is more preferably formed of any one of rubber or silicone material having elastic force, and in the embodiment of the present invention, it is proposed that the rubber material is formed so as to reduce the unit cost of the product. do.

That is, when the non-return valve 500 is formed of a rubber material, the inlet 531 of the inlet 530 is automatically opened by water pressure, and when the water pressure is released, the inlet 531 is opened by the elastic force. ) Is in a closed state.

On the other hand, the non-return valve 500 according to an embodiment of the present invention may further comprise a flow preventing protrusion 550 formed at the other end of the body portion 510.

At this time, the flow preventing projection 550 is installed so that the body portion 510 is in contact with the end portion of the water supply port 251, when the body portion 510 is inserted into the water supply port 251, the body portion 510 is It serves to prevent the flow into the steam generator 200.

In the above-described installation process of the non-return valve 500, the body 510 and the inlet 530 are inserted into the water inlet 251, and the flow preventing protrusion 550 is connected to the water inlet 251. Install it at the end.

 Next, when one end of the water supply pipe 250 is coupled to the outer circumference of the water supply port 251 in which the non-return valve 500 is installed, the non-return valve 500 is inserted into and fixed to the water supply port 251. It becomes a state.

At this time, the water supply pipe 250 with respect to the water supply port 251 is preferably coupled to the interference fit type, which is the one end of the water supply pipe 250 is coupled to the water supply port 251 in the process of the non-return valve 500 This is to compress the flow preventing protrusion 550 of the non-return valve 500 to be more firmly fixed.

Referring to the operation of the drum washing machine provided with a back pressure check valve in the water supply port 251 of the steam generator 200 as described above are as follows.

First, the water supplied from the water supply device 150 for steam washing is supplied to the case 201 of the steam generating device 200 through the water supply pipe 250 and the water level sensor 205 detects this to provide an appropriate water level. Adjust

At this time, as shown in Figure 6a, the reverse water pressure prevention valve 500 installed in the water supply port 251 of the steam generator 200 of the inlet portion 530 by the pressure of the water flowing into the water supply pipe 250 The inlet 531 is automatically opened and water is supplied to the case 201 through the back pressure check valve 500.

Next, the water supplied is heated by the heater 203 installed inside the case 201 of the steam generator 200, and steam is generated while the heated water boils.

At this time, the temperature sensor 215 is to maintain the proper temperature of the water supplied to the case 201.

Next, the generated steam is supplied to the steam supply pipe 270 through the steam discharge port 271 of the steam generator 200 and the steam supply pipe 270 is connected to the drum 103, the drum 103 ) Steam is discharged to the inside to perform steam washing.

Meanwhile, when jointly managing an external water pipe (not shown) in a public apartment, which is the above-mentioned problem, there may be a case where the water in the pipe is drained in the reverse direction by applying a reverse water pressure to the pipe for cleaning the external water pipe. However, when a negative pressure is applied through the water supply pipe 150 connected to the external water pipe in the state where the washing water is full in the tub 102 due to the failure of the drum washing machine, the water inside the drum washing machine is discharged through the water supply path. Done.

That is, if the reverse water pressure is not released and is delivered to the tub 102 as it is, the wash water filled in the tub 102 is steam supply pipe 270 ⇒ steam generator 200 ⇒ water supply pipe 250 ⇒ water supply device 150 Discharge through the discharge through the external water pipe (not shown), to prevent the reverse flow to the water supply device 150 by the non-return valve 500 according to an embodiment of the present invention.

Specifically, as shown in FIG. 6B, when the reverse water pressure is applied, when the contaminated washing water in the tub tries to flow back to the water supply device 150 in the state where the contaminated washing water flows into the steam generator 200, the water supply port ( Since the inlet 531 of the flow preventing valve inlet 530 installed at 251 is closed, it is blocked and prevented from flowing back to the water supply device 150.

Therefore, the washing water contaminated by washing or the like is prevented from flowing back to the external water pipe, thereby preventing the clean water on the external water pipe from being contaminated by the reversed washing water.

In particular, in the case of export drum washing machine, in order to satisfy the regulations of developed countries, even if the water is filled in the tub 102 at the time of failure, the standard is set so that the reverse water pressure is not applied. There is an advantage that can meet these specifications even under a drying system.

So far, the present invention has been described with reference to the embodiments, and those skilled in the art to which the present invention pertains may implement the modified forms of embodiments within the essential technical scope of the present invention. Here, the essential technical scope of the present invention is shown in the claims, and the modified forms within the equivalent range will be construed as being included in the present invention.

For example, the embodiment of the present invention as described above has been given a drum washing machine to help the understanding of the present invention, it can be applied to a general washing machine and a dry washing machine, which is a laundry machine having a structure similar to the drum washing machine, of course. .

Referring to the effect of the back pressure preventing structure of the laundry machine according to the embodiment of the present invention described above are as follows.

First, according to the present invention, by installing a back pressure check valve in the water supply port of the steam generator, the effect of preventing the contaminated washing water flows back to the water supply valve side through the water supply port of the steam generator. Has

Therefore, the contaminated washing water flows back to the external water pipe, thereby preventing the clean water on the external water pipe from being contaminated by the reversed washing water.

Secondly, according to the present invention, the structure of the back pressure check valve is simple and has an effect of reducing the manufacturing cost and assembly fixing.

Claims (7)

A drum rotatably installed inside the tub; A water supply port, which is a passage through which water is supplied, and a steam discharge port through which steam is discharged, and a steam generator that heats the water supplied to generate steam; A water supply pipe connecting the water supply port and a water supply device to guide water from the water supply device to the steam generator; A steam supply pipe connecting the steam discharge port and the drum to guide the steam generated by the steam generator to the drum; And, Backflow prevention means for preventing the reverse flow of the washing water in the tub back to the water supply valve side through the steam generating device is installed on the water supply pipe to the wash water is supplied. The method of claim 1, The backflow prevention means The back pressure prevention valve of the washing apparatus, wherein the water is supplied through the water supply apparatus and is opened by water pressure, and the wash water in the tub is closed to prevent the backflow of the washing apparatus. rescue. The method of claim 2, The backflow prevention valve is a back pressure preventing structure of the laundry machine, characterized in that installed in the water supply port of the steam generator. The method of claim 3, wherein The non-return valve is A body part which forms an appearance and is inserted into and fixed to the water inlet; And an inlet having an inlet formed by protruding from one end of the body part toward the direction of washing water and being opened by water pressure. The method of claim 4, wherein The inlet portion of the back pressure preventing structure of the laundry machine, characterized in that formed in a wedge shape. The method of claim 4, wherein The non-return valve is Is formed on the other end of the body portion, is formed to be caught on the end of the water inlet to prevent the backflow prevention valve further comprises a flow preventing projection for preventing the flow into the steam generator inside of the washing apparatus. The method according to any one of claims 2 to 6, The non-return valve is a back pressure preventing structure of the laundry machine, characterized in that formed by any one of rubber or silicone material with elastic force.

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