JP2006158673A - Hand washing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and realistically compose a hand washing apparatus to be installed later with a structure that can supply a specified amount of washing liquid depending on the amount of water discharged from a washing liquid tank which is installed separately. <P>SOLUTION: The hand washing apparatus is composed of a mixing nozzle 1, a washing liquid tank 5, and a supply restricting section 2. The washing liquid L supplied from the washing liquid tank 5 is once retained in the supply restricting section 2. A specified amount of washing liquid L is then forced out from the supply restricting section 2 utilizing the water pressure of water W to be fed into the supply restricting section 2, and the mixing nozzle 1 as an ejector using water W absorbs the specified amount of washing liquid L to mix the washing liquid L with water W inside the mixing nozzle 1 and discharge the mixture. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hand-washing apparatus that mixes a fixed amount of cleaning liquid into discharged water.

  Hand washing is performed by rubbing both hands with a cleaning solution and water to generate foam, so that the foam is covered with dirt and washed away. For this reason, it is necessary to discharge water from a faucet and to apply the cleaning liquid to the hand at any timing. In the simplest case, there is a method of providing a cleaning liquid tank that supplies cleaning liquid separately from the water faucet, supplying a fixed amount of cleaning liquid to the hand, and holding the hand with the cleaning liquid over the water discharged from the faucet. . However, this requires manual operation of the cleaning liquid tank, which is not very hygienic and takes time and effort to quickly finish hand washing. From now on, as can be seen in, for example, Patent Document 1, a hand washing apparatus that automates the supply of detergent has been proposed.

  The hand washing apparatus of Patent Document 1 senses an inserted hand with a sensor, first discharges water, then supplies a fixed amount of cleaning liquid from the cleaning liquid tank to the water and mixes with water. That is, the water to be discharged is discharged in a state where the cleaning liquid is mixed for a certain time. Thereby, the cleaning liquid and water are put on the hand, and foaming can be achieved by rubbing both hands. Further, since the time for which the cleaning liquid is mixed with water is constant, if the water is continuously discharged even after the supply of the cleaning liquid is stopped, the foam on the hand can be washed off.

Japanese Patent Laid-Open No. 2001-137150

  The supply of the cleaning liquid in Patent Document 1 is based only on the setting over time from the moment when the sensor first senses the hand, and since the water discharge is also automated, the supply time of the cleaning liquid is particularly changed. Even if it does not make it, a fixed amount of cleaning liquid can be supplied. However, in a scene where the flow rate of water changes, a fixed amount of cleaning liquid cannot be supplied unless the supply time of the cleaning liquid is changed in accordance with the flow rate. That is, as long as water discharge is automated, the configuration of Patent Document 1 can be used. However, for example, a hand-washing device retrofitted to a faucet such as an existing hand-washing place can adopt the configuration of Patent Document 1. Absent.

  In addition, referring to the configuration of Patent Document 1, even in a handwashing device that is retrofitted, a flow sensor may be installed for the faucet, and a fixed amount of cleaning liquid may be supplied from a separately installed cleaning tank according to the detected flow rate. However, since the flow rate of water can be changed arbitrarily and freely, it is difficult to make the supply amount of the cleaning liquid appropriate even in the configuration using this flow sensor. There is a high possibility that it will not be a realistic hand-washing device.

  Thus, in the structure of patent document 1, or the structure using the flow sensor which referred patent document 1, it is a hand-washing apparatus retrofitted with respect to faucets, such as an existing hand-washing place, according to the flow volume of the water discharged from a faucet. It is difficult to supply a certain amount of cleaning liquid. In view of this, in such a hand-washing apparatus attached later, an investigation was made in order to easily and practically configure a configuration capable of supplying a fixed amount of cleaning liquid according to the flow rate of discharged water from a separately installed cleaning liquid tank.

  What has been developed as a result of the study is a hand-washing device comprising a mixing nozzle, a cleaning liquid tank, and a supply restriction unit. The cleaning liquid supplied from the cleaning liquid tank is once stored in the supply restriction unit and sent to this supply restriction unit. Water is used to push the fixed amount of cleaning liquid from the supply restriction unit, and the mixing nozzle, which is an ejector using water, sucks the fixed amount of cleaning liquid, thereby mixing the water and the cleaning liquid in the mixing nozzle. It is a hand-washing device that releases it. The hand washing apparatus of the present invention limits the supply amount of the cleaning liquid supplied to the mixing nozzle by the supply limiting unit interposed between the mixing nozzle and the cleaning tank, and supplies the cleaning liquid of the limited supply amount to the mixing nozzle itself. Sucks.

  Here, if the mixing nozzle is an ejector using water, a specific configuration or structure is free. However, preferably, it comprises an introduction part for feeding water, a mixing part for mixing a fixed amount of cleaning liquid supplied from a limiting supply part with the water, and a discharge part for discharging the mixed water and the cleaning liquid. A passage hole is provided to communicate the introduction portion and the discharge portion while isolating the introduction portion and the discharge portion, the passage hole has an introduction side hole having a smaller cross-sectional area than the introduction portion, a cross-sectional area smaller than the discharge portion, and The discharge side hole having a larger cross-sectional area than the introduction side hole is connected, and the cleaning liquid supply hole is provided in the discharge side hole near the step portion formed by connecting the introduction side hole and the discharge side hole, and passes through the passage hole. It is preferable to use a mixing nozzle in which negative pressure is generated in the stepped portion with water and the cleaning liquid is sucked into the passage hole from the cleaning liquid supply hole connecting the cleaning liquid supply path. The suction force of the mixing nozzle is stronger than that of a normal ejector structure, and the cleaning liquid restricted by the supply restriction unit as described above can be sufficiently sucked only by the suction force of the mixing nozzle.

  The mixing nozzle not only sucks the cleaning liquid with a strong suction force, but also mixes the cleaning liquid directly with water and generates a large amount of bubbles, specifically microbubbles, when the water and the cleaning liquid are discharged from the passage holes. . Here, since more foam is preferable for hand washing, the mixing nozzle has a plurality of passage holes, and each passage hole discharges in the vicinity of a stepped portion formed by connecting an introduction side hole and a discharge side hole. A cleaning liquid supply hole or an air supply hole is provided in the side hole, and negative pressure is generated in the step portion by water passing through the passage hole, and the cleaning liquid is sucked into the passage hole from the cleaning liquid supply hole connecting the cleaning liquid tank, or externally Air may be sucked from the communicating air supply hole. As a result, in each passage hole, either cleaning liquid or air can be directly mixed with water, and more bubbles, specifically microbubbles, can be formed by water, cleaning liquid and air released from the passage holes. Can be generated.

  Although various configurations can be considered for the supply limiting unit, a configuration using the pressure of water is preferable. Specifically, the first cylinder and the first piston, the second cylinder and the second piston, the connecting shaft for interlocking the first piston and the second piston, the second piston displacement destination of the second cylinder and the cleaning liquid supply A receiving side supply port connecting the passage, a feed side supply port connecting the cleaning liquid delivery path extending from the cleaning liquid supply hole of the mixing nozzle to the second piston displacement destination of the second cylinder, and a water supply path extending from the faucet. It comprises a water pressure application port connected to a first piston displacement source of one cylinder, and a water communication hole is provided in the first piston and the first cylinder is connected to the mixing nozzle, and water is sent to the mixing nozzle through the first cylinder. The second piston is displaced in conjunction with the first piston, which is displaced by the pressure of the water fed from the water supply passage, and is supplied from the cleaning liquid tank in advance to the second piston. When the cleaning liquid stored in the second piston displacement destination of the solder is pushed out to the cleaning liquid delivery path by a fixed amount proportional to the displacement amount of the second piston, the mixing nozzle sucks the fixed amount of cleaning liquid from the cleaning liquid supply hole, and the first cylinder The limiting supply part which mixes the water taken in from the cleaning liquid and the cleaning liquid sucked from the cleaning liquid supply hole can be shown.

  The limited supply unit of the present invention extrudes a fixed amount of cleaning liquid, and the mixing nozzle sucks only the fixed amount of the cleaned cleaning liquid, thereby supplying the fixed amount of cleaning liquid to the mixing nozzle without refluxing the cleaning liquid to the cleaning liquid tank. To do. At first glance, it seems that the cleaning liquid can be pushed out to the mixing nozzle only by the displacement of the first piston and the second piston. However, if the passage hole of the mixing nozzle is at normal pressure, the cleaning liquid flows back into the cleaning liquid supply path, The cleaning liquid cannot be reliably fed into the mixing nozzle. That is, the extrusion of the cleaning liquid due to the displacement of the first piston and the second piston and the suction of the cleaning liquid by the mixing nozzle can be combined to reliably feed a fixed amount of the cleaning liquid to the mixing nozzle.

  Here, the “second piston displacement destination of the second cylinder” is the side in the direction in which the second piston in the normal state is displaced by the displacement of the first piston among the space of the large cylinder defined by the second piston. That is, it means the side narrowed by the displacement of the second piston. From this, the side widened by the displacement of the second piston becomes the “second piston displacement source of the second cylinder”. The same applies to the first cylinder. From this, it can be seen that the first piston and the second piston are preferably close to one side in the first cylinder or the second cylinder as normal. In this case, the first piston and the second piston may be attached to the connecting shaft with a return spring that is biased in the direction opposite to the direction displaced by the negative pressure.

  Further, as another supply restricting portion, an extrusion cylinder and an extrusion piston, a receiving side supply port for connecting an extrusion piston displacement destination of the extrusion cylinder and a cleaning liquid supply path, and a cleaning liquid delivery path extending from the cleaning liquid supply hole are provided in the extrusion cylinder. The feed side supply port connected to the extrusion piston displacement destination of the nozzle and the water pressure application port connecting the water supply path extending from the faucet to the extrusion piston displacement source of the extrusion cylinder communicate the extrusion piston displacement source of the extrusion cylinder with the mixing nozzle. Then, the water is sent to the mixing nozzle through the extrusion piston displacement source of the extrusion cylinder, and the extrusion piston is displaced by the pressure of the water fed from the water supply path, and is supplied in advance from the cleaning liquid tank to the extrusion piston displacement destination of the extrusion cylinder. When the stored cleaning liquid is pushed out to the cleaning liquid delivery path by a fixed amount proportional to the displacement amount of the extrusion piston, Sometimes, the cleaning liquid mixing nozzle of the quantification was aspirated from the cleaning liquid supply hole, it is also possible to show a configuration for mixing the aspirated cleaning liquid from the water and the cleaning liquid supply hole to be taken from the extruding piston displacement source of the extrusion cylinder.

  Also in this supply restricting section, it is possible to reliably feed a fixed amount of cleaning liquid into the mixing nozzle by combining the extrusion of the cleaning liquid due to the displacement of the extrusion piston and the suction of the cleaning liquid by the mixing nozzle. The extrusion piston which has finished the displacement for pushing out the cleaning liquid must be returned to the original position again. As the return means for the extrusion piston, various conventionally known means can be used. However, the structure in which the return spring that urges the extrusion piston in the direction opposite to the direction displaced by the water pressure is built in the extrusion cylinder is the simplest and stable configuration. is there.

  According to the present invention, it is possible to provide a hand-washing apparatus that is retrofitted to a faucet such as an existing hand-washing place and supplies a fixed amount of cleaning liquid in accordance with the flow rate of water discharged from the faucet. This is an effect obtained by extruding a fixed amount of the cleaning liquid from the supply restriction unit and the mixing nozzle sucking only the fixed amount of the cleaned cleaning liquid. Although it is easy to push out the cleaning liquid in accordance with the timing at which water is discharged from the faucet, there is a possibility that the cleaning liquid may flow back to the cleaning liquid tank. In addition, it is difficult to limit the amount of cleaning liquid to a fixed amount only by suction using a mixing nozzle. The present invention is superior in that both can be combined and the supply amount can be limited to a fixed amount while the supply of the cleaning liquid is started in accordance with the discharge of water.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view of a hand-washing apparatus in which a restriction supply unit 2 using a first piston 211 and a second piston 221 that are interlocked is integrated with a mixing nozzle 1 before water W is discharged. FIG. FIG. 3 is a partial cross-sectional view showing a state before the discharge of water W of a hand-washing apparatus in which the restriction supply unit 3 using the extrusion piston 311 is integrated with the mixing nozzle 1. FIG. 4 is a partial cross-sectional view showing the water washing apparatus during discharge of the water. Each hand-washing apparatus shown in FIGS. 1 to 4 is different in the configuration of the supply restriction units 2 and 3, and the mixing nozzle 1 and the cleaning liquid tank 5 are the same. Here, the cleaning liquid tank 5 has a configuration that can be seen conventionally only by storing the cleaning liquid L and supplying the cleaning liquid L to the cleaning liquid supply hole 115 of the mixing nozzle 1 through the cleaning liquid supply path 42. Therefore, the mixing nozzle 1, which is the remaining common part, will be described first while paying attention to small differences with respect to the supply restriction units 2 and 3.

  As shown in FIGS. 1 and 3, the mixing nozzle 1 commonly used in each example communicates with water through a water supply path 43 and a water delivery path 431 provided in each of the supply restriction units 2 and 3. From the introduction part 12 for feeding W, the mixing part 13 for mixing the cleaning liquid L and the air A with the water W, and the discharge part 14 for discharging the microbubbles generated by mixing the water W, the cleaning liquid L and the air A Become. The introduction part 12 has a female screw part 121 for connecting to male screw parts 241 and 341 provided outside the water delivery paths 431 of the supply restriction parts 2 and 3 on the inner surface, An annular seal ring 122 is press-contacted to the interior. The discharge part 14 is provided with a female screw part 141 that is screwed to the male screw part 131 on the outer surface of the mixing part 13 provided integrally with the introduction part 12 and projecting downstream, and is detachable from the mixing part 13. An annular seal ring 142 that is pressed against the lower end of the mixing portion 13 is provided in the cylindrical member, and a metal perforated plate 144 (punching metal) 144 and a plurality of metal meshes 145 (in FIG. 1) are provided directly below the seal ring 142. A stirrer 143 in which a cylinder including a metal mesh is stacked is provided. In the stirring unit 143, the metallic porous plate 144 and the metal mesh 145 are roughened in order toward the lower layer. As a result, the water W and the microbubbles B discharged through the mixing unit 13 collide with the stirring unit 143 and are stirred, thereby generating a larger amount and finer microbubbles B.

  The mixing unit 13 is configured integrally with the introduction unit 12 and isolates the introduction unit 12 and the discharge unit 14, and as described, a total of four passage holes 11 are provided around the center of the plan view. . Each passage hole 11 includes a cylindrical introduction side hole 111 having a smaller cross-sectional area than the introduction part 12, and a cylindrical discharge side hole 112 having a smaller cross-sectional area than the discharge part 14 and a larger cross-sectional area than the introduction side hole 111. And a cleaning liquid supply hole 115 or an air supply hole 116 (passing around the periphery) to the discharge side hole 112 in the vicinity of the step 113 having a truncated cone side surface shape formed by connecting the introduction side hole 111 and the discharge side hole 112. A hole 11) is provided. The cleaning liquid supply hole 115 and the air supply hole 116 extend horizontally in the radial direction, and connect the cleaning liquid delivery path 421 or the air supply path 44 on the outer surface of the mixing unit 13. As a result, the supply restricting portions 2 and 3 are operated by the negative pressure P applied through the negative pressure applying passage 61, and the cleaning liquid L passes from the restricting supply portions 2 and 3 through the cleaning liquid delivery passage 621 connected to the cleaning liquid supply hole 115. The air A is sucked into the vent hole 11 from the outside through the air supply path 64 connected to the air supply hole 116, and the water W and the cleaning liquid L or the air A are mixed in each passage hole 11.

  The mixing nozzle 1 pushes the water W in a pressurized state from the introduction part 12 to the introduction side hole 111 of the passage hole 11, and pressurizes the step 113 formed between the introduction side hole 111 and the discharge side hole 112. The cleaning liquid L or air A is sucked using the negative pressure P generated when the water W in the state passes. As a result, the cleaning liquid L or air A can be directly mixed with the water W, and thus the water W mixed with the cleaning liquid L or air A is discharged from the discharge side hole 112 of the passage hole 11 and mixed, and further, the water W When W collides, it is agitated to generate and discharge a large amount of microbubbles B. The microbubbles B generated by mixing the cleaning liquid L and the air A with the water W have an effect of washing off stains on the hands well. Further, as will be described later, when the supply of the cleaning liquid L is limited to a fixed amount, only the air A can be mixed with the water W to generate the microbubbles B. The microbubbles B generated by mixing only the air A with the water W are effective for rinsing after hand washing.

  The magnitude of the negative pressure P generated by each passage hole 11 depends on the ratio of the cross-sectional areas of the introduction side hole 111 and the discharge side hole 112 and the flow rate of the main liquid. For example, the introduction side hole 111 has a diameter of 1 mm, Discharge side hole 112 is 2mm in diameter and both are coaxial. When water W (main liquid) is poured at a flow rate of 2L / min to 4L / min, a negative pressure P of 0.2 to 0.9 atm (20 to 90kPa) is generated. Can be made. The negative pressure P is larger than the negative pressure generated by a conventional mixing nozzle of the same type, which is an ejector that uses water, and, like the cleaning liquid L, it is possible to suck a liquid that is heavier than air and viscous. I have to. Here, the reason why the passage hole 11 of the present example shortens the introduction side hole 111 and lengthens the discharge side hole 112 is that the cleaning liquid L or the liquid W is pushed into the introduction side hole 111 at an early stage. This is because the air A is taken in and the water W and the cleaning liquid L or the air A are sufficiently mixed in the long discharge side hole 112, and the magnitude of the negative pressure P is not directly related.

  Next, each of the restriction supply units 2 and 3 will be described. 1 includes a first cylinder 21 and a first piston 211, a second cylinder 22 and a second piston 221, a connecting shaft 23 for interlocking the first piston 211 and the second piston 221, A receiving side supply port 223 connecting the second piston displacement destination 222 of the second cylinder 22 and the cleaning liquid supply path 42 and a cleaning liquid delivery path 421 extending from the cleaning liquid supply hole 115 of the mixing nozzle 1 are provided in the second cylinder 22. The feed-side supply port 224 connected to the two-piston displacement destination 222 and the water pressure application port 218 that connects the water supply passage 43 extending from the faucet (not shown) to the first piston displacement source 217 of the first cylinder 21. As described above, the first cylinder 21 and the second cylinder 22 are integrally laminated on the upper portion of the mixing nozzle 1 in this order. For this purpose, the first piston 211 is provided with a communication hole 219 for water W and a water delivery path 431 for communicating the first cylinder 21 with the introduction portion 12 of the mixing nozzle 1, and the water W is mixed with the mixing nozzle 1 through the first cylinder 21. Sent to 1.

  The first cylinder 21 is a sealed space in which the first cylinder 215 that also serves as a liner for smooth displacement of the first piston 211 is surrounded by the lower block 24 and the intermediate block 25, so that the first cylinder 215 is secured in order to ensure airtightness. A seal ring 216 is interposed at the joint between each block 24 and 25. The water pressure application port 218 is provided in the intermediate block 25, and a water pressure application path 432 provided from the water pressure application port 218 through the intermediate block 25 is opened on the upper surface of the first cylinder 21. A water delivery path 431 that communicates with the introduction portion 12 of the mixing nozzle 1 is provided through the lower block 24 and opens at the bottom surface of the first cylinder 21. The water W sent from the water supply passage 43 to the water pressure application port 218 then pushes the first piston 211 down through the water pressure application passage 432 and mixes from the water delivery passage 431 through the communication hole 219 of the first piston 211. It flows into the introduction part 12 of the nozzle 1.

  The second cylinder 22 is a sealed space in which the second cylinder 225 that also serves as a liner for smooth displacement of the second piston 221 is surrounded by the intermediate block 25 and the upper block 26 in order to ensure airtightness and watertightness. A seal ring 226 is interposed at the joint between the second cylinder 225 and the blocks 25 and 26. The receiving side supply port 223 and the feeding side supply port 224 are provided in the intermediate block 25 and open to the bottom surface of the second cylinder 22. The receiving side supply port 223 connects the cleaning liquid supply path 42 extending from the cleaning liquid tank 5 and supplies the cleaning liquid L to the second piston displacement destination 222 of the second cylinder 22. Further, the feed side supply port 224 connects the cleaning liquid delivery path 421 extending from the cleaning liquid supply hole 115 of the mixing nozzle 1, and sends the cleaning liquid L from the second piston displacement destination 222 of the second cylinder 22 to the mixing nozzle 1.

  The first piston 211 and the second piston 221 are flat resin discs whose outer peripheral surfaces are in sliding contact with the respective cylinders. The first piston 211 is connected to the connecting shaft 23 that extends upward through the upper block 26. The second piston 221 is fixed to the lower end of the shaft 23 in the middle of the connecting shaft 23. A seal ring 231 for securing watertightness is attached to a portion of the connecting shaft 23 that penetrates the second cylinder 22. In this example, the displacement amount of the displaced first piston 211 is limited at a position where the water pressure and the repulsive force of a return spring 232, which will be described later, are balanced. The second piston 221 interlocked with the first piston 211 is also the first piston 211. Since only the displacement of one piston 211 is displaced, the second piston displacement destination 222 of the second cylinder 22 has a space larger than the cleaning liquid that can be pushed out. In this case, an air reservoir is provided on the assumption that air is mixed from the cleaning liquid tank 5. Thus, even if air is mixed into the second cylinder 22 from the cleaning liquid tank 5, only the cleaning liquid L is pushed out from the bottom surface of the second cylinder 22 that opens the feed side supply port 224. The displacement of the piston 221 prevents air from being pushed out from the feed side supply port 224 to the mixing nozzle 1. The capacity of the second piston displacement destination 222 of the second cylinder 22 having this air reservoir is preferably about 1.5 to 2 times the supply amount of the cleaning liquid L to be pushed out.

  In addition, the restriction supply unit 2 of this example presses and lowers the first piston 211 with water pressure, so that the first piston 211 and the second piston 221 are normally held above the cylinders 21 and 22. It is desirable. In this example, a return spring 232 made of a coil spring that is biased in the direction opposite to the direction in which the first piston 211 and the second piston 221 are displaced by water pressure is attached to the connecting shaft 23 that protrudes through the upper block 26. ing. Specifically, the return spring 232 is repelled upward from the upper surface of the upper block 26 and pushes up the nut 233 screwed to the connecting shaft 23, thereby causing the first piston 211 and the second piston 221 to move to the cylinders 21, Hold the position above 22. The repulsive force of the return spring 232 can be adjusted by the screwing position of the nut 233 with respect to the connecting shaft 23, and the repulsive force of the return spring 232 can be easily adjusted along with the deterioration over time. A stopper cover 234 is attached to the connecting shaft 23 so as to cover the return spring 232 so that the return spring 232 is not over-compressed.

  The operation of the supply restriction unit 2 of this example is as follows. For convenience of explanation, the description will be made from the stage where the fixed amount of cleaning liquid L is already stored in the second piston displacement destination 222 of the second cylinder 22. When water is fed from the water supply path 43 to the water pressure application port 218, the water W flows into the first piston displacement source 217 of the first cylinder 21 through the water pressure application path 432, as shown in FIG. Is pushed downward. The first piston 211 is lowered by this pressing, but the water W flows out to the first piston displacement destination 212 of the first cylinder 21 through the communication hole 219 provided in the first piston 211. Therefore, the first piston 211 has a hydraulic pressure and a return spring. It will only descend to a position where the repulsive force of 232 equilibrates. The second piston 221 is displaced downward within the range of displacement of the first piston 211, and pushes the cleaning liquid L stored in the second cylinder displacement destination 222 of the second cylinder 22 from the feed side supply port 224.

  At this time, as the second piston 221 descends, the cleaning liquid L seems to be sent out to the receiving side supply port 223 connected to the cleaning liquid tank 5, but the receiving side connected to the cleaning liquid supply hole 115 of the mixing nozzle 1 through the cleaning liquid delivery path 421. Since the negative pressure P is acting on the supply port 228, the cleaning liquid L is pushed out from the feed side supply port 224. That is, the extrusion by the second piston 221 and the negative pressure P of the feed side supply port 224 are combined to supply the cleaning liquid L to the mixing nozzle 1. Here, the supply amount of the cleaning liquid L is proportional to the displacement amount of the second piston 221, and the supply speed of the cleaning liquid L is proportional to the negative pressure P applied from the cleaning liquid supply hole 115. Therefore, in this example, the flow rate adjustment valve 422 is provided in the cleaning liquid delivery path 421 so that the cleaning liquid L is not supplied at a time.

  The flow rate adjusting valve 422 not only restricts the cleaning liquid L supplied at one time but also functions to limit the negative pressure P applied to the second piston displacement destination 222 of the second cylinder 22 through the cleaning liquid delivery path 421. As a result, the cleaning liquid L cannot be sucked only by the negative pressure P applied from the mixing nozzle 1, and only the cleaning liquid L pushed out by the displacement of the second piston 221 passes through the cleaning liquid delivery path 421 to the mixing nozzle 1. It becomes possible to supply. This means that the cleaning liquid L and air remaining in the second cylinder 22 are not supplied to the mixing nozzle 1 when the second piston 221 finishes displacement. This prevents the air in the second cylinder 22 from being sent to the mixing nozzle 1 and additionally supplies the cleaning liquid L from the cleaning liquid tank 5 to the second cylinder 22 while the mixing nozzle 1 generates microbubbles. It can be prevented from being taken in.

  When the water W is stopped, there is no water W flowing into the mixing nozzle 1 and there is no water pressure to push down the first piston 211. Therefore, the first piston 211 and the second piston 221 are pushed upward according to the repulsive force of the return spring 332, Return to the original position. At this time, the volume change of the second piston displacement destination 222 of the second cylinder 22 accompanying the displacement of the second piston 221 generates a large negative pressure, and the cleaning liquid L is replenished from the cleaning liquid tank 5 through the cleaning liquid supply path 42. Become. At this time, a check valve 227 that communicates only in the direction in which the cleaning liquid L is supplied toward the mixing nozzle 1 is provided in the cleaning liquid delivery path 421 so that air is not taken into the second cylinder 22 via the cleaning liquid delivery path 421. It is built in the feed side supply port 224. Similarly, the check valve 228 is connected to the cleaning liquid supply path 42 only in the direction in which the cleaning liquid L is supplied toward the second cylinder 22 so that air does not flow from the second cylinder 22 into the cleaning liquid tank 5. Built in 223. As described above, the supply restriction unit 2 in the hand washing apparatus of the present example is stored in the second cylinder 22 in response to the supply and stop of water to the mixing nozzle 1 without requiring an external operation. The cleaning liquid L is sent in a fixed amount, and the second cylinder 22 can be automatically replenished with the cleaning liquid L.

  3 includes an extruding cylinder 31 and an extruding piston 311, a receiving side supply port 323 that connects the extruding piston displacement destination 312 of the extruding cylinder 31 and the cleaning liquid supply path 42, and the mixing nozzle 1. A feed side supply port 324 connecting the cleaning liquid delivery path 421 extending from the cleaning liquid supply hole 115 to the extrusion piston displacement destination 312 of the extrusion cylinder 31 and a water supply path 42 extending from a faucet (not shown) are displaced by the extrusion piston of the extrusion cylinder 31. As described above, the extrusion cylinder 311 is integrally laminated on the upper portion of the mixing nozzle 1 with the configuration including the water pressure application port 318 connected to the element 317. For this reason, the water supply path 42 is branched and one of the water supply passages 432 is connected to the extrusion piston displacement source 317 of the extrusion cylinder 31 and the other is the water delivery path 431 connected to the mixing nozzle 1. 42 is sent to the mixing nozzle 1 through the water delivery path 431.

  The extrusion cylinder 31 is a sealed space in which the extrusion piston displacement destination 312 of the cylindrical block 315 in which the extrusion piston 311 is accommodated is closed by a closed block 319. The extruding piston 311 is a resin cylinder whose outer peripheral surface is in sliding contact with the cylindrical block 315, and a return spring 332 made of a coil spring is interposed between the closing block 319 on the upper surface of the extruding cylinder 31. As a result, the extrusion piston 31 is normally in a position to close the open end of the water pressure application path 432. A water pressure application port 318 is provided in the cylindrical block 315, and a water pressure application path 432 branched from the water pressure application port 318 is opened to the extrusion piston displacement source 317 of the extrusion cylinder 31. A water delivery path 431 that communicates with the introduction portion 12 of the mixing nozzle 1 is also branched from the water pressure application port 318 and provided through the cylindrical block 315, and opens at the end of the cylindrical block 315 that connects the mixing nozzle 1. ing. From this, the water W fed from the water supply path 43 pushes the push-out piston 311 up through the water pressure application path 432 and simultaneously flows into the introduction part 12 of the mixing nozzle 1 from the water feed path 431. The receiving side supply port 328 and the feeding side supply port 327 are provided in the closing block 319 and open to the extrusion piston displacement destination 312 of the extrusion cylinder 31. The receiving side supply port 323 connects the cleaning liquid supply path 42 extending from the cleaning liquid tank 5 and supplies the cleaning liquid L to the extrusion piston displacement destination 312 of the extrusion cylinder 31. Further, the feed side supply port 324 connects the cleaning liquid delivery path 421 extending from the cleaning liquid supply hole 115 of the mixing nozzle 1, and sends the cleaning liquid L from the extrusion piston displacement destination 312 of the extrusion cylinder 31 to the mixing nozzle 1.

  In this example, the extrusion piston 311 rises due to the water pressure caused by the water W flowing from the water pressure application path 432, and the cleaning liquid L stored in the extrusion piston displacement destination 312 of the extrusion cylinder 31 is sent on the feed side according to the displacement amount of the extrusion piston 311. While pushing out from the supply port 324, the receiving side supply port 323 and the feed side supply port 324 are closed simultaneously by the extrusion piston 311. As a result, the cleaning liquid tank 5 and the mixing nozzle 1 are completely shut off, and after the fixed amount of cleaning liquid L has been supplied from the extrusion piston displacement destination 312 of the extrusion cylinder 31, nothing is pushed out from the feed side supply port 324. . That is, air is not sent to the mixing nozzle 1. This is an effect of simultaneously closing the receiving side supply port 323 and the feeding side supply port 324 by the push piston 311 being pushed up by the water pressure and rising, and for this purpose, the repulsive force of the return spring 332 is greater than the water pressure. It needs to be low.

  The operation of the supply restriction unit 3 in this example is as follows. For convenience of explanation, the description will be made from the stage where the fixed amount of cleaning liquid L is already stored in the push piston displacement destination 312 of the push cylinder 31. When water W is sent from the water supply passage 43 to the water pressure application port 318, the water W presses the extrusion piston 311 through the water pressure application passage 432 as shown in FIG. The extrusion piston 311 is raised against the repulsive force of the return spring 332, and the cleaning liquid L stored in the extrusion cylinder displacement destination 312 of the extrusion cylinder 31 is pushed out from the feed side supply port 324. Further, water W is sent to the introduction portion 12 of the mixing nozzle 1 through the water delivery path 431 branched from the water pressure application path 432, and a negative pressure P is applied to the feed side supply port 324 from the cleaning liquid supply hole 115 through the cleaning liquid delivery path 421.

  At this time, it appears that the cleaning liquid L is also sent out to the receiving side supply port 323 connected to the cleaning liquid tank 5 due to the rise of the extrusion piston 311, but the receiving side supply is supplied through the cleaning liquid delivery path 421 connected to the cleaning liquid supply hole 115 of the mixing nozzle 1. Since the negative pressure P is acting on the port 323, the cleaning liquid L is pushed out from the feed side supply port 324. That is, the extrusion of the extrusion piston 311 and the negative pressure P of the feed side supply port 324 are combined to supply the cleaning liquid L to the mixing nozzle 1. Here, the supply amount of the cleaning liquid L is the total amount of the cleaning liquid L stored in the extrusion piston displacement destination 312 of the extrusion cylinder 311, and the supply speed of the cleaning liquid L is proportional to the negative pressure P applied from the cleaning liquid supply hole 115. .

  In the limiting supply unit 3 of this example, since the extrusion piston 311 that has finished pushing out the cleaning liquid L closes both the receiving side supply port 323 and the feed side supply port 324, the air is mixed with the mixing nozzle 1 after the supply of the cleaning liquid L is completed. There is no fear of being sent to. Rather, when the discharge of water W is stopped and the extrusion piston 311 descends, the cleaning liquid delivery path 421 is directed toward the mixing nozzle 1 so that air is not taken into the extrusion cylinder 31 via the cleaning liquid delivery path 421. Thus, a check valve 327 that communicates only in the direction in which the cleaning liquid L is supplied is provided. Similarly, in order to prevent the inflow of air from the extrusion cylinder 31 to the cleaning liquid tank 5, a check valve 328 that communicates only in the direction in which the cleaning liquid L is supplied toward the extrusion cylinder 31 is also provided in the cleaning liquid supply path 42. .

  When the water W is stopped, there is no water W flowing into the mixing nozzle 1 and there is no water pressure to push up the extrusion piston 311. Therefore, the extrusion piston 311 is pushed downward according to the repulsive force of the return spring 332 and returns to the original position. At this time, the volume change of the extrusion piston displacement destination 312 of the extrusion cylinder 31 accompanying the displacement of the extrusion piston 311 generates a large negative pressure, and the cleaning liquid L is replenished from the cleaning liquid tank 5 through the cleaning liquid supply path 42. As described above, the supply restricting unit of the present example requires only the cleaning liquid L stored in the extrusion cylinder 31 in response to the supply and stop of the water W to the mixing nozzle 1 without requiring an external operation. The cleaning liquid L can be automatically replenished to the extrusion cylinder 31.

It is a fragmentary sectional view showing before discharge of water of a hand-washing device which constituted a limit supply part using the 1st piston and the 2nd piston which interlocked with a mixing nozzle. It is a fragmentary sectional view showing during discharge of the water of the hand-washing apparatus. It is a fragmentary sectional view showing before discharge of the water of the hand-washing apparatus which comprised the restriction | limiting supply part using an extrusion piston integrally with the mixing nozzle. It is a fragmentary sectional view showing during discharge of the water of the hand-washing apparatus.

Explanation of symbols

1 Mixing nozzle
11 Through hole
111 Introduction side hole
112 Discharge side hole
113 steps
115 Cleaning fluid supply hole
116 Air supply hole
12 Introduction
13 Mixing section
14 Discharge part
143 Stirring unit 2 Restricted supply unit
21 1st cylinder
211 1st piston
212 First piston displacement destination
217 First piston displacement source
218 Water pressure port
219 communication hole
22 2nd cylinder
221 2nd piston
222 Second piston displacement destination
223 Receiver supply port
224 Feeding side supply port
23 Connecting shaft
232 Return spring
233 nut
24 Lower block
25 Intermediate block
26 Upper block 3 Restricted supply section
31 Extrusion cylinder
311 Extrusion piston
312 Extrusion piston displacement destination
317 Extrusion piston displacement source
318 Water pressure application port
323 Receiver supply port
324 Feeding side supply port
332 Return spring
42 Cleaning fluid supply path
421 Cleaning fluid delivery path
43 Water supply channel
431 Water delivery path
432 Water pressure application path
44 Air supply path 5 Cleaning liquid tank W Water L Cleaning liquid A Air B Micro bubble P Negative pressure

Claims (7)

A hand washing apparatus comprising a mixing nozzle, a cleaning liquid tank, and a supply limiting unit, wherein the cleaning liquid supplied from the cleaning liquid tank is once stored in the supply limiting unit, and the pressure of the water fed into the supply limiting unit is used. A hand washing device that extrudes a fixed amount of cleaning liquid from a supply restricting unit and sucks the fixed amount of cleaning liquid by a mixing nozzle, which is an ejector using water, so that water and the cleaning liquid are mixed and discharged in the mixing nozzle. . The mixing nozzle is composed of an introduction section for feeding water, a mixing section for mixing a fixed amount of cleaning liquid supplied from the limited supply section with the water, and a discharge section for discharging the mixed water and cleaning liquid. A passage hole communicating the introduction part and the discharge part while isolating the part and the discharge part, the passage hole having a smaller cross-sectional area than the introduction part, a cross-sectional area smaller than the discharge part, and Connect the discharge side hole with a larger cross-sectional area than the introduction side hole, and provide the cleaning liquid supply hole in the discharge side hole near the stepped part formed by connecting the introduction side hole and the discharge side hole, and pass through the passage hole The hand-washing apparatus according to claim 1, wherein a negative pressure is generated in the step portion by the water to be sucked, and the cleaning liquid is sucked into the passage hole from the cleaning liquid supply hole connecting the cleaning liquid supply path. The mixing nozzle has a plurality of passage holes, and each passage hole is formed by providing a cleaning liquid supply hole or an air supply hole in the discharge side hole in the vicinity of the stepped portion formed by connecting the introduction side hole and the discharge side hole. The negative pressure is generated in the stepped portion by the water passing through the hole, and the cleaning liquid is sucked into the passage hole from the cleaning liquid supply hole connecting the cleaning liquid tank, or the air is sucked from the air supply hole communicating with the outside. 2. The hand-washing apparatus according to 2. The supply restriction unit includes a first cylinder and a first piston, a second cylinder and a second piston, a connecting shaft for interlocking the first piston and the second piston, a second piston displacement destination of the second cylinder, and a cleaning liquid supply. A receiving side supply port connecting the passage, a feed side supply port connecting the cleaning liquid delivery path extending from the cleaning liquid supply hole of the mixing nozzle to the second piston displacement destination of the second cylinder, and a water supply path extending from the faucet. It comprises a water pressure application port connected to a first piston displacement source of one cylinder, and a water communication hole is provided in the first piston and the first cylinder is connected to the mixing nozzle, and water is sent to the mixing nozzle through the first cylinder. The second piston is displaced in conjunction with the first piston that is displaced by the pressure of the water fed from the water supply path, and is supplied in advance from the cleaning liquid tank. The cleaning liquid stored in the second piston displacement destination of Linda is pushed out to the cleaning liquid delivery path by a fixed amount proportional to the displacement amount of the second piston, and at the same time, the mixing nozzle sucks the fixed amount of cleaning liquid from the cleaning liquid supply hole. The hand-washing apparatus in any one of Claims 1-3 formed by mixing the water taken in from and the washing | cleaning liquid attracted | sucked from the said washing | cleaning-liquid supply hole. The hand-washing apparatus according to claim 4, wherein the first piston and the second piston are attached to a connecting shaft with a return spring that is urged in a direction opposite to a direction displaced by water pressure. The supply restriction unit includes an extrusion cylinder and an extrusion piston, a receiving side supply port that connects an extrusion piston displacement destination of the extrusion cylinder and a cleaning liquid supply path, and a cleaning liquid delivery path extending from the cleaning liquid supply hole. It consists of a feed-side supply port that is connected first, and a water pressure application port that connects a water supply path extending from the faucet to the extrusion piston displacement source of the extrusion cylinder. It is sent to the mixing nozzle through the extrusion piston displacement source of the extrusion cylinder, the extrusion piston is displaced by the pressure of the water fed from the water supply path, and the cleaning liquid supplied in advance from the cleaning liquid tank and stored in the displacement of the extrusion piston of the extrusion cylinder is stored. At the same time as pushing out to the cleaning liquid delivery path by a fixed amount proportional to the displacement of the extrusion piston, 4. The device according to claim 1, wherein the suction pipe sucks the fixed amount of cleaning liquid from the cleaning liquid supply hole, and mixes the water taken in from the displacement of the extrusion piston of the extrusion cylinder and the cleaning liquid sucked from the cleaning liquid supply hole. Hand washing equipment. 7. The hand washing apparatus according to claim 6, wherein the push-out piston has a return spring built in the push-out cylinder that is biased in a direction opposite to the direction displaced by water pressure.

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