JP4893686B2 - Washing water discharge device - Google Patents

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 soiled after cooking or eating in the kitchen are scrubbed by hand with a scrubbing brush or sponge with a 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 contaminated water may be mixed with tap water and contaminate domestic drinking water. 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 washing water to the water pipe side is caused by the negative pressure destruction by the air release valve and the washing water drainage by the drain valve. 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 upstream of the detergent supply unit 9. Further, the drainage valve 41 that opens the drainage drain 42 when the atmosphere release valve 7 is opened at a position lower than the atmosphere release valve 7 in the wash water flow path 3 between the detergent supply unit 9 and the atmosphere release valve 7. Is provided.

  By adopting such a configuration, when the water is stopped, the air release valve 7 can make a negative pressure destruction state in which water flow between the detergent supply unit 9 side and the water pipe 4 side is cut off. Since the drainage valve 41 at the lower position is opened and the washing water from the discharge nozzle 14 is drained from the drainage drain 42, the washing water flow path 3 in which the washing water on the discharge nozzle 14 side is open to the atmosphere is high or low. It is also possible to reliably prevent overcoming the difference and flowing back to the water pipe 4 side.

  The drain valve 41 preferably operates to open and close so as to open the drainage drain 42 in response to a decrease in water pressure on the water pipe 4 side. In this case, the drainage valve has a simple structure that opens and closes due to changes in the tap water pressure. The valve 41 can be configured.

  Further, the washing water flow path 3 is provided with a three-way branch passage that leads to the detergent supply section 9 side, the atmosphere release valve 7 side, and the drainage drain 42 side, and only the drainage drain 42 side is provided in the three-way branch passage when water flows. It is preferable to dispose a drain valve 41 that closes only the atmosphere release valve 7 side when the water is closed. In this case, the drain valve 41 operates in a state in which only the drain drain 42 side is closed and in a state in which only the atmosphere release valve 7 side is closed. Therefore, the drain valve 41 can have a simple configuration.

  Further, the washing water flow path 3 is provided with a three-way branch passage that leads to the detergent supply section 9 side, the atmosphere release valve 7 side, and the drainage drain 42 side, and only the drainage drain 42 side is provided in the three-way branch passage when water flows. It is preferable to arrange a drain valve 41 that simultaneously opens three sides of the air release valve 7 side, the detergent supply unit 9 side, and the drainage drain 42 side when the water is closed. In this case, the drain valve 41 remains on each of the three sides when draining by the drain valve 41. All the washing water can be drained, and the backflow of the washing water to the water pipe 4 side can be more reliably prevented.

  The present invention can reliably prevent the backflow of washing water to the water pipe side by the negative pressure destruction effect by the air release valve and the discharge effect of the backflow detergent by the drain valve, and there is no possibility of contaminating the tap water. Yes, by taking such backflow prevention measures, a system configuration that complies with the Water Supply Law can be easily realized.

  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 flush water flow path 3 is provided with a constant flow valve 5 (pressure reducing valve), a water stop valve 6, an air release valve 7, and a drain valve 41 in order from the upstream side, and further on the downstream side. The discharge nozzle 14 is connected via the riser 15 and the nozzle hose 16 so that the washing water that has passed through these is sequentially discharged into the kitchen sink 13 from the discharge port 12 provided at the tip of the discharge nozzle 14. It has become.

  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 air release valve 7 is a float valve that opens and closes due to a change in the water pressure on the upstream side of the wash water flow path 3, and opens and closes to open the space in the wash water flow path 3 to the atmosphere in response to a drop in water pressure on the water pipe 4 side. Operates and functions as a negative pressure breaker.

  A later-described drain valve 41 is disposed on the downstream side of the atmosphere release valve 7, and a flow path downstream of the drain valve 41 is a riser pipe 15. As shown in FIG. 1, the riser pipe 15 is erected upward from the counter 18, and a curran neck portion 28 is attached to an upper end portion thereof. The currant neck portion 28 is formed in an arch shape with the tip facing forward and downward, the nozzle hose 16 is housed inside, and one end of the nozzle hose 16 is connected downstream of the riser tube 15. The end is connected to the rear end portion of the discharge nozzle 14 disposed outside the curran neck portion 28.

  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. 7. 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. 6, the operation switch 26 of the on-off valve 22 is provided on the discharge nozzle 14 side, and the opening / closing of the on-off 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.

  Here, FIG. 4 shows an example of the drain valve 41. The drain valve 41 is installed under the counter 18 constituting the upper surface of the sink 2. The drain valve 41 is disposed at a position H1 that is higher than the lowermost part H2 on the detergent supply unit 9 side and lower than the height H of the air release valve 7, and according to a decrease in water pressure on the water pipe 4 side. It opens and closes so as to open the drainage drain 42. In the example of FIG. 4, the wash water flow path 3 is provided with a three-way branch path that leads to the detergent supply unit 9 side (3a side), the air release valve 7 side (3b side), and the drainage drain 42 side, A drain valve 41 is disposed in the three-way branch path. The drain valve 41 is always urged by the valve spring 46 toward the valve seat 43 on the atmosphere release valve 7 side, and when passing water, the valve spring 46 is pressed by water pressure and contracts to be pressed by the valve seat 44. As a result, the drainage drain 42 side is closed, and as shown by the arrow A, water is passed from the atmosphere release valve 7 side (3b side) to the detergent supply unit 9 side (3a side). When the valve spring 46 is restored and the drain valve 41 is pressed toward the valve seat 43 on the atmosphere release valve 7 side, the atmosphere release valve 7 side is closed and the drain drain 42 side is opened, which is indicated by an arrow B. In this way, the washing water from the discharge nozzle 14 is drained.

  In order to clean an object to be cleaned such as the surface of the kitchen sink 13 or tableware using the cleaning water discharge device 1 having the above-described configuration, the discharge nozzle 14 is moved and the discharge port 12 is directed toward the object to be cleaned. The water 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, the water stop valve 6 and the drain valve 41. At this time, the float of the air release valve 7 floats up and closes 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 wash water flow path 3 is opened to the atmosphere. Since the water is opened, the water flow between the detergent supply unit 9 side and the water pipe 4 side becomes 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 drain valve 41 closes the atmosphere release valve 7 side and the drain drain 42 is opened, so that the cleaning water on the discharge nozzle 14 side is discharged to the outside. The washing water does not reach the water pipe 4 side over the height difference (H2, H1, H) of the washing water flow path 3 in the atmosphere open state on the atmosphere release valve 7 side. Accordingly, the negative pressure destruction effect by the air release valve 7 and the wash water discharge effect by the drain valve 41 can surely prevent the backflow of the wash water to the water pipe 4 side, so there is no possibility of contaminating the tap water. There is an advantage that a backflow prevention measure can be taken and a system configuration that complies with the Waterworks Law can be easily realized.

  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 an advantage that the atmosphere release valve 7 can be configured with a simple float valve, and the drain valve 41 also has an advantage that a simple valve structure that opens and closes according to a decrease in the water pressure of tap water can be used.

  Note that the air release valve 7 and the drain valve 41 are not necessarily those that automatically open and close in response to changes in water pressure, and are constituted by electromagnetic valves that open and close electrically in conjunction with a water stop operation, for example. Also good.

  Moreover, in the said embodiment, although the drain valve 41 was arrange | positioned under the counter 18, you may arrange | position the drain valve 41 on the counter 18, for example, as shown in FIG. In this example, 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 that is folded back at a sufficient height. An air release valve 7 is provided at the upper end of the riser 15. A drain valve 41 is accommodated in the riser 15. The drain valve 41 is disposed at a position H 1 that is higher than the lowermost part H 2 on the detergent supply unit 9 side and lower than the height H of the atmosphere release valve 7. In this example, the drain valve 41 is disposed lower than the air release valve 7 by disposing the drain valve 41 at a height that is approximately ½ of the riser 15.

  FIG. 5 is a modification of FIG. 4, in which only the drainage drain 42 side is closed when water flows through the three-way branch path provided in the washing water flow path 3, and the air release valve 7 side (3 b) and the detergent supply unit 9 side when water is stopped. This is an embodiment in which a drain valve 41 that opens (3a) and the drain drain 42 side at the same time is disposed. Other configurations are the same as those of the embodiment of FIG. In this example, the drain valve 41 is urged by the valve spring 46 toward the central valve seat 45 provided in the flow path portion between the atmosphere release valve 7 side and the drain drain 42 side. When water flows, the valve spring 46 is pressed and contracted by water pressure, and the drain valve 41 is pressed toward the valve seat 44 on the drain drain 42 side, so that the drain drain 42 side is closed as shown in FIG. Thus, as shown by the arrow A, water is passed from the atmosphere release valve 7 side to the detergent supply unit 9 side (discharge nozzle 14 side). On the other hand, when the water stops, the valve spring 46 is restored and the drain valve 41 is pressed toward the central valve seat 45, so that the atmosphere release valve 7 side, the detergent supply unit 9 side, as shown in FIG. The three sides on the drainage drain 42 side are opened simultaneously, and as shown by arrows (b) and (c), not only the washing water from the discharge nozzle 14 but also the remaining washing water from the atmosphere release valve 7 side is drained to the drainage drain 42, respectively. become able to. Therefore, all the wash water remaining in the wash water flow path 3 on the downstream side of the air release valve 7 can be drained, and there is an advantage that the backflow of the wash water to the water pipe 4 side can be more reliably prevented.

  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, 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 drain valve and air release valve 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 explaining other embodiment which has arrange | positioned the drain valve same as the above of the counter of a sink. (A) shows the state where the same drainage valve is arranged on the three-way branch path, (b) shows the water flow state from the atmosphere release valve side to the detergent supply side by closing the drainage drain side, (c) It is a schematic block diagram which shows the waste_water | drain state from the detergent supply part side to the waste_water | drain drain side by closing the air release valve side. (A) (b) is explanatory drawing of other embodiment of the drain valve arrange | positioned at a three-way branch path 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 Wash water discharge device 3 Wash water flow path 4 Water pipe 6 Water stop valve 7 Air release valve 9 Detergent supply part 14 Discharge nozzle 19 Internal flow path 41 Drain valve 42 Drain drain

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 performed, the cleaning water flow path upstream of the detergent supply unit is provided with an air release valve that opens and closes in conjunction with a water stop operation, and the detergent supply unit A washing water discharge device characterized in that a drainage valve is provided in the washing water flow path between the atmosphere opening valve and lower than the atmosphere opening valve to open the drainage drain when the atmosphere opening valve is opened. .   2. The washing water discharge device according to claim 1, wherein the drain valve opens and closes so as to open the drainage drain according to a decrease in water pressure on the water pipe side.   The washing water flow path is provided with a three-way branch passage that leads to the detergent supply unit side, the air release valve side, and the drainage drain side, and only the drainage drain side is closed in the three-way branch passage when water is passed, and the air release valve is closed. 2. A washing water discharge device according to claim 1, wherein a drain valve for closing only the side is disposed. The washing water flow path is provided with a three-way branch passage that leads to the detergent supply unit side, the air release valve side, and the drainage drain side. 2. The washing water discharge device according to claim 1, wherein a drain valve is provided that simultaneously opens three sides of the side, the detergent supply unit side, and the drainage drain side.

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