JP2009257022A - Wash water discharge apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily achieve system constitution that observes the Waterworks Law by surely preventing the backflow of wash water to the water pipe side by negative pressure breaking by an atmosphere opening valve and by the upper limit movable regulation of a discharge nozzle. <P>SOLUTION: The atmosphere opening valve 7 is provided in a wash water passage 3 upstream of a cleanser supply part 9 of the discharge nozzle 14 and in a position above a discharge port 12 of the discharge nozzle 14. The discharge nozzle 14 is arranged to be movable, and its upper limit movable region A is regulated so that the discharge port 12 of the discharge nozzle 14 is always located below the atmosphere opening valve 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cleaning water discharge device, and more particularly to a cleaning water discharge device including a detergent supply unit that performs self-feeding of a liquid detergent into cleaning water using a discharge pressure of a water supply.

  In general, objects to be cleaned such as dishes and pans that are contaminated after cooking or eating in the kitchen are scrubbed by hand with a scrubbing brush or sponge with liquid detergent, or a dishwasher is used. Yes. In the case of hand-washing, liquid detergent and long-term running water cause rough hands. In a dishwasher, there is a problem that persistent dirt cannot be removed sufficiently.

  Normal faucet currants installed in the sink are designed to reduce splashes and improve cleanability by using foam water or shower water, but the cleaning power is low and the surface of the kitchen sink and dishes to be cleaned are washed. I can't clean things.

  2. Description of the Related Art Conventionally, there is known a bubbled cleaning water discharge device that includes a detergent supply unit that performs self-feeding of a liquid detergent into cleaning water using a water discharge pressure and a gas mixing unit that mixes gas (for example, Patent Document 1).

In the conventional bubbled cleaning water discharge device, the detergent tank of the discharge nozzle and the internal flow path leading to the water pipe communicate with each other. When backflow occurs, the wash water from the discharge nozzle flows back to the water pipe side, and the contaminated water may mix with the tap water and contaminate the drinking water in the home. There was a problem that the system configuration to be observed was complicated.
JP 2000-345595 A

  The present invention has been invented in view of the above-described conventional problems, and the problem is that the cleaning water to the water pipe side is caused by the negative pressure destruction by the air release valve and the upper limit movable restriction of the discharge nozzle. It is an object of the present invention to provide a washing water discharge device that can reliably prevent the backflow of water and thereby easily realize a system configuration that complies with the Water Supply Law.

  In order to solve the above-described problems, the present invention is characterized by the following configurations.

  The discharge nozzle 14 is connected to the downstream end of the washing water flow path 3 whose upstream end is connected to the water pipe 4 through the water stop valve 6, and the discharge pressure of the water supply is used for the internal flow path 19 of the discharge nozzle 14. This is a washing water discharge device 1 provided with a detergent supply unit 9 that performs self-feeding of liquid detergent. An air release valve 7 that opens and closes in conjunction with a water stop operation is provided in the wash water flow path 3 that is located upstream of the detergent supply unit 9 and above the discharge port 12 of the discharge nozzle 14. The discharge nozzle 14 is movably disposed, and a restriction means is provided for restricting the upper limit movable region A so that the discharge port 12 of the discharge nozzle 14 is always located below the atmosphere release valve 7.

  By adopting such a configuration, at the time of water stoppage, the air release valve 7 can make a negative pressure destruction state in which water flow between the discharge nozzle 14 side and the water pipe 4 side is cut off. Since the upper limit movable region A of the discharge port 12 is always controlled to be positioned below the air release valve 7, the difference in the height of the wash water flow path 3 in which the wash water on the discharge nozzle 14 side is open to the atmosphere is reduced. It is possible to reliably prevent overflowing back to the water pipe 4 side.

  Moreover, it is preferable that the said air release valve 7 opens and closes so that the space in the washing water flow path 3 may be opened to the atmosphere in response to a decrease in water pressure on the water pipe 4 side. The air release valve 7 can be configured with a simple structure that opens and closes.

  Further, the regulating means preferably includes a mechanism for changing the nozzle angle of the discharge nozzle 14 within a range not exceeding the upper limit movable region A. In this case, the discharge angle can be changed by changing the nozzle angle of the discharge nozzle 14. The discharge range of the cleaning water from the nozzle 14 can be expanded.

  Further, the regulating means preferably includes a nozzle hose 16 that makes the withdrawal length of the discharge nozzle 14 variable within a range not exceeding the upper limit movable region A. In this case, the withdrawal length of the nozzle hose 16 is increased. Thus, the movable region of the discharge nozzle 14 can be further expanded.

  The present invention ensures the backflow of cleaning water including detergent to the water pipe side by the effect of negative pressure destruction by the air release valve and the effect of regulating the upper limit movable area of the discharge nozzle outlet below the air release valve. Therefore, it is possible to easily implement a system configuration that complies with the Water Supply Law by taking such a backflow prevention measure.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 2 is an example of the cleaning water discharge device 1 for the kitchen sink 13 provided at a position different from the normal faucet currant 40 of the sink 2.

  The upstream end of the cleaning water channel 3 of the cleaning water discharge device 1 is connected to a water pipe 4, and tap water serving as a water source is supplied to the cleaning water channel 3. As shown in FIG. 1, the washing water flow path 3 is provided with a constant flow valve 5 (pressure reducing valve), a water stop valve 6 and an air release valve 7 in order from the upstream side, and a discharge nozzle 14 is further provided on the downstream side. The wash water that has been connected and passed through these in turn is discharged into the kitchen sink 13 from the discharge port 12 provided at the tip of the discharge nozzle 14.

  The constant flow valve 5 and the water stop valve 6 are built in the sink 2. The constant flow valve 5 depressurizes the tap water by the discharge pressure of the tap water and sends it to the downstream side with a constant flow rate. The water stop valve 6 is composed of an electromagnetic valve, and switching whether or not the cleaning water is discharged from the discharge port 12 of the discharge nozzle 14 by opening and closing the water stop valve 6.

  The flow path downstream of the water stop valve 6 of the wash water flow path 3 is composed of a riser pipe 15 and a nozzle hose 16 connected to the discharge nozzle 14.

  Here, as shown in FIG. 1, the rising pipe 15 extends upward from a counter 18 that constitutes the upper surface of the sink 2, and is composed of an inverted U-shaped pipe folded back downward with a sufficient height, An air release valve 7 is provided at the upper end of the riser 15. That is, the air release valve 7 is provided at the uppermost part of the cleaning water flow path 3 upstream of the detergent supply unit 9 of the discharge nozzle 14 and higher than the discharge port 12 at the tip of the discharge nozzle 14. In this example, the air release valve 7 is a float valve that opens and closes due to a change in water pressure in the riser 15, and opens the space in the wash water flow path 3 to the atmosphere in response to a decrease in water pressure on the water pipe 4 side. It opens and closes and functions as a negative pressure breaker.

  The downstream of the riser 15 is connected to one end of the nozzle hose 16 at a height H that is approximately ½ or less of the height of the riser 15. The nozzle hose 16 is made of a flexible bendable member and is guided in a curran neck portion 28 formed integrally with the riser tube 15. The other end of the nozzle hose 16 is connected to a rear end portion of the discharge nozzle 14 disposed outside the curran neck portion 28. The curran neck portion 28 of this example is formed in an arch shape whose tip is directed forward and downward, and the length of the nozzle hose 16 and the length of the curran neck portion 28 are set to be substantially the same length. 16 and the currant neck 28 constitute a restricting means. Further, the nozzle angle of the front end portion of the discharge nozzle 14 can be varied up and down and left and right in a state where the rear end portion of the discharge nozzle 14 is disposed in the vicinity of the front end of the currant neck portion 28. Further, the nozzle angle of the discharge nozzle 14 is regulated so that the discharge port 12 at the tip of the discharge nozzle 14 is always positioned below the atmosphere release valve 7. That is, the upper limit movable region A of the discharge port 12 of the discharge nozzle 14 is restricted so as not to be positioned above the atmosphere release valve 7.

  The discharge nozzle 14 is provided with a gas mixing unit 8, a detergent supply unit 9, a bubble refining unit 10, and a rectifying unit 11 shown in FIG. Here, a linear internal flow path 19 composed of an upstream portion 19a, a midstream portion 19b, and a downstream portion 19c is formed inside the discharge nozzle 14. A throttle pipe 20 is provided in the upstream portion 19a of the internal flow path 19, and the downstream pipe diameter of the throttle pipe 20 is shorter than the upstream pipe diameter. On the inner peripheral surface of the upstream portion 19a of the internal flow path 19, the gas mixing portion 8 formed of the gas intake port 8a and the liquid are located at a position facing the outer peripheral surface of the throttle tube 20 or a position slightly downstream of the throttle tube 20. A detergent supply section 9 including a detergent intake 9 a is provided. In the illustrated example, the gas mixing section 8 is provided at a position facing the outer peripheral surface of the throttle pipe 20, and the inner circumference located slightly downstream of the throttle pipe 20. A detergent supply unit 9 is provided on the surface.

  The gas mixing part 8 is open to the room, and the wash water passes through the throttle tube 20, so that a negative pressure is generated in the vicinity of the gas mixing part 8 of the internal flow path 19, and the outside air is utilized by using the ejector effect. Is taken into the internal flow path 19 from the gas mixing part 8.

  The detergent supply unit 9 communicates with the inside of the detergent tank 21. An open / close valve 22 is provided in the middle of the flow path from the outlet of the detergent tank 21 to the detergent supply unit 9. As shown in FIG. 7, the operation switch 26 of the opening / closing valve 22 is provided on the discharge nozzle 14 side, and the opening / closing of the opening / closing valve 22 can be switched by operating the operation switch 26. Reference numeral 17 in the figure denotes a cap that opens and closes the liquid detergent replenishing port of the detergent tank 21. In the detergent tank 21, a liquid detergent, for example, a liquid detergent stock solution or a liquid detergent stock solution diluted with water is stored.

  The midstream portion 19b of the internal flow path 19 is a venturi-shaped flow path, and is composed of an upstream pressure reducing section 23 and a downstream pressure increasing section 24. The decompression unit 23 is composed of a channel whose diameter is reduced toward the downstream side, and the pressure increase unit 24 is composed of a channel whose diameter is enlarged toward the downstream side, and the bubbled washing water passing through the midstream part 19b. In this case, relatively large bubbles contained along with the pressure fluctuation generated when passing through the pressure reducing unit 23 and the pressure increasing unit 24 are sheared and refined. Moreover, the mesh 25 for further refine | miniaturizing a bubble is provided in the downstream end part of the midstream part 19b (pressure increase part 24).

  The downstream part 19c of the internal flow path 19 is the rectifying part 11 having a circular shape with the same cross section in the flow direction. The rectifying unit 11 has a flow path length L that is 2 to 5 times the diameter a of the rectifying unit 11, and the bubbled cleaning water is rectified by the rectifying unit 11 having a circular cross section and a long channel length, thereby biasing the discharge amount. It is preventing.

  In order to clean the object to be cleaned such as the surface of the kitchen sink 13 or tableware using the cleaning water discharge apparatus 1 having the above-described configuration, the nozzle angle of the discharge nozzle 14 is changed to direct the discharge port 12 toward the object to be cleaned. Then, the water stop valve 6 is opened and tap water is supplied from the water pipe 4 to the washing water flow path 3 and passes through the riser pipe 15 through the constant flow valve 5 and the water stop valve 6. At this time, the float of the air release valve 7 floats up to block the air release port, so that the space in the washing water flow path 3 is sealed, and the tap water passes through the riser 15 and passes through the nozzle hose 16 and is discharged from the discharge nozzle. 14, and after passing through the internal flow path 19 of the discharge nozzle 14, it is discharged from the discharge port 12 at the tip of the discharge nozzle 14. At this time, air is mixed from the gas mixing unit 8 using the discharge pressure of the water supply, and the operation switch 26 provided on the discharge nozzle 14 is operated to open the on-off valve 22, so that the liquid detergent in the detergent tank 21 is discharged. It is self-supplied from the detergent supply unit 9 and is discharged from the discharge port 12 as cleaning water containing bubbles.

  Here, when the water stop valve 6 is closed or when a negative pressure (for example, −54 KPa) is generated on the water pipe 4 side due to water breakage or the like, the air release valve 7 is opened and the space in the washing water flow path 3 is opened to the atmosphere. Since the water is opened, the water flow between the discharge nozzle 14 side and the water pipe 4 side is cut off, resulting in a negative pressure destruction state, and the backflow phenomenon of the washing water to the water pipe 4 is prevented.

  In addition, at this time, the rear end portion of the movable discharge nozzle 14 is positioned at a height H substantially half of the riser tube 15 and the upper limit movable region A of the discharge port 12 at the tip of the discharge nozzle 14 is always open to the atmosphere. Since it is regulated so as to be lower than the valve 7, the washing water from the discharge nozzle 14 side does not reach the water pipe 4 side over the height difference of the washing water flow path 3 in the atmosphere open state. Therefore, as a result of the negative pressure destruction effect by the atmosphere release valve 7 and the upper limit movable restriction effect of the discharge nozzle 14, the backflow of the washing water to the water pipe 4 can be surely prevented, so that the backflow prevention without the possibility of contaminating the tap water is prevented. There is an advantage that measures can be taken and a system configuration that complies with the Waterworks Law can be easily realized.

  Further, in this example, the length of the nozzle hose 16 is set to be substantially the same as the length of the currant neck portion 28, so that the distal end portion of the discharge nozzle 14 is not separated from the currant neck portion 28. The nozzle hose 16 and the currant neck portion 28 can be easily configured to be variable up and down, left and right, and when not in use, the discharge nozzle 14 can be held in the currant neck portion 28 so that it can be held well. Usability is improved. In addition, since a member for holding the discharge nozzle 14 with respect to the curran neck portion 28 is not required, there is an advantage that the system configuration can be further simplified.

  In addition, the air release valve 7 of this example is opened and closed so as to open the space in the washing water flow path 3 to the atmosphere in response to a decrease in the water pressure on the water pipe 4 side, so that it can be easily opened and closed by a change in the tap water pressure. There is also an advantage that the atmosphere release valve 7 can be configured with a simple float valve.

  Note that the air release valve 7 is not limited to one that automatically opens and closes in response to a change in water pressure, and may be composed of, for example, an electromagnetic valve that opens and closes electrically in conjunction with a water stop operation.

  FIG. 3 shows an embodiment in which the curran neck portion 28 is provided at a position H1 that is lower than the height H that is approximately ½ of the riser tube 15, in a range not exceeding the upper limit movable region A, and The nozzle hose 16 can be pulled out from the curanneck portion 28, whereby the movable region of the discharge nozzle 14 can be expanded, and the nozzle hose 16 can be accommodated in the curran neck portion 28 when not in use.

  FIG. 4 shows that the height of the upper end portion of the rising pipe 15 is set to a height H2 higher than usual so that the curran neck portion is arranged at a height substantially half that of the rising pipe 15. This is an embodiment in which the height H ′ of 28 can be increased, and the movable region of the discharge nozzle 14 is further widened within a range not exceeding the upper limit movable region A and by extending the pull-out length of the nozzle hose 16. It becomes possible.

  FIG. 5 shows an embodiment in which the curran neck portion 28 is extendable from the rising pipe 15 to the front B, and the discharge nozzle 14 is within a range not exceeding the upper limit movable region A and without bending the nozzle hose 16. It becomes possible to expand the movable region of the front.

  The nozzle hose 16 used in FIGS. 3 to 5 is not limited to a flexible bendable one, but may be a telescopic one such as a bellows.

  FIG. 6 shows an embodiment in which the rear end portion of the discharge nozzle 14 is rotatably connected to and supported by the upper portion of the riser tube 15 via a hinge portion 29 that is a restricting means. The hinge portion 29 of the present example restricts the discharge nozzle 14 so that it can be varied from a horizontal direction to a substantially vertical direction and cannot be rotated above the horizontal direction. In addition, since the curaneck portion for guiding it can be omitted, there is an advantage that the regulating means can be simplified.

  In addition, although the case where the detergent tank 21 was integrally attached to the discharge nozzle 14 was illustrated in the said embodiment, it does not necessarily restrict to this, for example, the detergent tank 21 is provided separately from the discharge nozzle 14, and the detergent tank 21 is used as a detergent. A configuration in which the detergent supply unit 9 of the discharge nozzle 14 is connected via a supply pipe is also possible.

  Moreover, although the case where the discharge nozzle 14 can be rotated up and down and right and left is illustrated in the embodiment, the discharge nozzle 14 can be moved only to the left and right at a position below the atmosphere release valve 7 and cannot be rotated up and down. It can also be fixed.

  Moreover, in the said embodiment, although the discharge nozzle 14 which had the gas mixing part 8 and the detergent supply part 9 was illustrated, the gas mixing part 8 is omissible.

It is a schematic block diagram of the washing water discharge apparatus provided with the air release valve and the control means of one Embodiment of this invention. It is a perspective view explaining an example of installation of a washing water discharge device same as the above. It is a schematic block diagram of the other example of a control means same as the above. It is a schematic block diagram of the further another example of the control means same as the above. It is a schematic block diagram of the further another example of the control means same as the above. It is a schematic block diagram of the further another example of the control means same as the above. It is a perspective view explaining the connection state of the same discharge nozzle and detergent tank. It is sectional drawing explaining the internal structure of a discharge nozzle same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing water discharge apparatus 3 Washing water flow path 4 Water pipe 6 Water stop valve 7 Atmospheric release valve 9 Detergent supply part 14 Discharge nozzle 19 Internal flow path A Upper limit movable area

Claims (4)

  A discharge nozzle is connected to the downstream end of the wash water flow path whose upstream end is connected to the water pipe via a water stop valve, and the self-retention of liquid detergent is drawn into the internal flow path of the discharge nozzle using the discharge pressure of the water supply. In the cleaning water discharge device provided with the detergent supply unit to be opened and closed in conjunction with the water stop operation, the cleaning water channel located upstream from the detergent supply unit and above the discharge port of the discharge nozzle An air release valve is provided, the discharge nozzle is movably disposed, and a restriction means for restricting the upper limit movable region so that the discharge port of the discharge nozzle is always located below the air release valve is provided. A cleaning water discharge device characterized by the above.   2. The cleaning water discharge device according to claim 1, wherein the air release valve operates to open and close so as to open a space in the cleaning water flow path to the atmosphere according to a decrease in water pressure on the water pipe side.   2. The cleaning water discharge device according to claim 1, wherein the regulating means includes a mechanism for changing the nozzle angle of the discharge nozzle within a range not exceeding the upper limit movable region.   2. The cleaning water discharge device according to claim 1, wherein the regulating means includes a nozzle hose that makes the discharge length of the discharge nozzle variable within a range not exceeding the upper limit movable region.

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