JP4764625B2 - Mixing nozzle and hand washing device using the same - Google Patents

Description

  The present invention relates to a mixing nozzle that generates bubbles by mixing, for example, air or a cleaning liquid with water, and a hand-washing apparatus using the mixing nozzle.

  In hand-washing, both hands with a cleaning solution and water are rubbed together to generate foam, so that the foam is covered with dirt and washed away. From this it can be seen that it is preferable to generate as many bubbles as possible. In recent years, it has been found that the smaller the bubbles to be generated, the higher the cleaning ability, and the focus has shifted to generating more smaller bubbles (hereinafter referred to as microbubbles). An apparatus for generating such microbubbles is found in, for example, Patent Document 1.

  Patent Document 1 has an introduction part of pressurized liquid and gas and a cylindrical bubble generation space, and in the introduction part, a pressurized liquid supply hole and a gas supply hole that open to the bubble generation space are formed, An adjustment valve that opens the pressurized liquid supply hole to an end surface of the introduction part, opens the gas supply hole to a side surface of the introduction part, and adjusts a gas introduction amount to a gas introduction pipe communicating with the gas supply hole; The provided microbubble discharge nozzle is disclosed.

JP 2001-058142 A

  The microbubble discharge nozzle of Patent Document 1 causes a “peeling phenomenon” when the pressurized liquid introduced into the bubble generation space from the pressurized liquid supply hole is discharged into the bubble generation space. The gas introduced from the gas supply holes is dispersed as microbubbles in the discharge water flow. Patent Document 1 does not mention the cleaning liquid, and only water and air are mixed for the first time in the bubble generation space, and only microbubbles are generated. Therefore, it is clear whether microbubbles suitable for hand washing are generated or not. Not.

  Further, the suction force due to the water peeling phenomenon is weak, and it can be considered that relatively light air is sucked to some extent, but it seems that a cleaning liquid heavier than air and viscous cannot be sucked. From this, in order to generate microbubbles in which the cleaning liquid is also mixed with the microbubble discharge nozzle of Patent Document 1, there is no other way than mixing the cleaning liquid with water in advance.

  Thus, it can be said that the microbubble discharge nozzle of Patent Document 1 is not suitable for a hand washing apparatus that requires a cleaning liquid. Therefore, to develop not only air but also cleaning liquid by suction, mix water, cleaning liquid, and air to generate microbubbles, and provide a hand-washing device using this mixing nozzle Especially, the structure of the mixing nozzle was examined.

  What has been developed as a result of the study is an inlet that feeds the main liquid, a mixing unit that mixes the main liquid with the sub-liquid or gas, and a discharge that discharges bubbles generated by mixing the main liquid and the sub-liquid or gas. The mixing portion is provided with a passage hole that communicates 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, and a discharge portion. A sub liquid supply hole is formed in the discharge side hole in the vicinity of the step formed by connecting the discharge side hole having a smaller cross-sectional area than the introduction part and having a larger cross-sectional area than the introduction side hole, and connecting the introduction side hole and the discharge side hole. Alternatively, a gas supply hole is connected, a negative pressure is generated in the step by the main liquid passing through the passage hole, the sub liquid is sucked into the passage hole from the sub liquid supply hole, or a gas is passed from the gas supply hole. It is a mixing nozzle formed by suction.

  The main liquid is a reference liquid for mixing the sub-liquid or gas, and corresponds to water in the hand-washing apparatus. The sub-liquid is an additional liquid to be mixed with the main liquid and corresponds to the cleaning liquid in the hand washing apparatus. And gas is additional gas mixed with the said main liquid, and hits the air in a hand-washing apparatus. The mixing nozzle of the present invention is suitable for a hand-washing device that mixes water, cleaning liquid, and air to generate microbubbles, but the combination of the main liquid, sub-liquid and gas is free, and others that mix liquid and gas The mixing nozzle of the present invention can also be used for these devices.

  The mixing nozzle pushes the main liquid from the introduction part into the introduction side hole which is the front stage of the passage hole. Thus, when the main liquid in a pressurized state passes through a step which is a boundary between the introduction side hole and the discharge side hole in the passage hole, a strong negative pressure is generated in the step. In the present invention, this negative pressure is used to suck the cleaning liquid or air into the passage hole. Unlike the prior art, the portion where the negative pressure is generated is in a narrow passage hole and can be used for suction of cleaning liquid or air without waste. The sucked cleaning liquid or air is reliably mixed with water in the narrow passage hole, and is discharged to the discharge portion after passing through the passage hole, so that a large amount of microbubbles can be generated.

  When only one passage hole is provided, either one or both of the auxiliary liquid supply hole and the gas supply hole are provided for the passage hole. However, when there are a plurality of passage holes, a passage hole not provided with the sub liquid supply hole and the gas supply hole may be combined with a passage hole provided with the sub liquid supply hole or the gas supply hole. Moreover, when there are a plurality of passage holes, each passage hole may be provided with only one of the sub liquid supply hole and the gas supply hole. That is, for example, when there are four passage holes, two are passage holes provided with sub liquid supply holes, and the other two are passage holes provided with gas supply holes, and the sub liquid or gas mixed in each passage hole is separated. Can do. Thereby, the negative pressure generated in each passage hole can be used only for suctioning either the secondary liquid or the gas.

  Water and the cleaning liquid or air are mixed while passing through the passage hole, and microbubbles are generated at the stage where the water is discharged from the passage hole. Here, in order to generate a larger amount of microbubbles, water, a cleaning liquid, or air may be further stirred together before discharging the bubbles from the mixing nozzle. Specifically, the discharge unit may have a water-permeable stirring unit interposed between the opening end of the discharge side hole and the outside. This stirrer is an obstacle that collides water mixed with cleaning liquid or air, and mixes and stirs water, cleaning liquid or air together, and is made of metal or resin mesh, metal or resin perforated plate, Examples thereof include caps or the like in which metallic or resinous scouring obstacles are combined alone or in layers, or water holes are opened. Moreover, these stirring parts also function as a filter for physical foreign substances.

  The hand washing apparatus using the mixing nozzle of the present invention can be configured as follows. That is, a hand washing apparatus comprising a mixing nozzle and a cleaning liquid tank, wherein the mixing nozzle is connected to a faucet of a water supply and feeds water, a mixing section for mixing the cleaning liquid or gas with the water, and water and cleaning liquid or It consists of a discharge part that discharges bubbles generated by mixing with air, and the mixing part is provided with a passage hole that communicates the introduction part and the discharge part while isolating the introduction part and the discharge part. An introduction side hole having a smaller cross-sectional area than the introduction part and a discharge side hole having a smaller cross-sectional area than the discharge part and a larger cross-sectional area than the introduction side hole are connected, and the introduction side hole and the discharge side hole are connected. The discharge side hole in the vicinity of the step is provided with a cleaning liquid supply hole or an air supply hole, and negative pressure is generated in the step by the water passing through the passage hole, and the cleaning liquid is passed through the cleaning liquid supply hole connecting the cleaning liquid tank. Sucked or connected to the outside A wash apparatus comprising sucked air from the air supply holes.

  The hand-washing apparatus of the present invention is characterized in that a strong negative pressure generated by the mixing nozzle is used, and a cleaning liquid heavier than air and viscous is sucked into the mixing nozzle by suction. And the washing | cleaning liquid taken in into a mixing nozzle can be restrict | limited to fixed_quantity | quantitative_assay by utilizing the said strong negative pressure. This hand washing device restricts the amount of the cleaning liquid to a fixed amount, the mixing nozzle has a plurality of passage holes, a passage hole provided with a cleaning liquid supply hole or an air supply hole, and a passage provided with a negative pressure applying hole for applying a negative pressure to the outside. A hole is combined, and a supply restricting portion is interposed in a cleaning liquid supply path connecting the mixing nozzle and the cleaning liquid tank. The negative pressure applying hole is connected to the supply restricting portion, and the negative pressure applying hole is given. This is a hand-washing device in which a supply restricting section operated by a negative pressure restricts the supply amount from the cleaning liquid tank, and the cleaning liquid is sucked into the passage hole from the cleaning liquid supply hole by a fixed amount.

  A specific supply restriction unit includes a storage tank that is set in the cleaning liquid of the cleaning liquid tank, a supply port that connects the inside of the storage tank and the cleaning liquid supply path, an intake port that communicates the inside of the storage tank and the outside, It consists of a stop valve that closes the suction port provided on the bottom of the storage tank from below, and an elevating part connected to a negative pressure application path extending from the negative pressure application hole, so that the stop valve and the elevating part are interlocked And the stop valve is displaced upward by an up-and-down motion part that rises due to the negative pressure applied from the negative pressure application hole through the negative pressure application path to block the flow of the cleaning liquid from the suction port, and from the cleaning liquid tank The supply amount is limited to the storage amount of the storage tank, and a configuration in which the storage amount of the cleaning liquid is sucked into the passage hole from the cleaning liquid supply hole can be shown. The elevating and lowering movement unit may be configured by a diaphragm in which a connecting rod extending upward from the stop valve is connected to the lower surface, and a displacement space in which the negative pressure applying path end is opened on the upper surface.

  Further, in the hand washing apparatus for limiting the amount of the cleaning liquid to a fixed amount, the mixing nozzle has a plurality of passage holes, a passage hole provided with a cleaning liquid supply hole or an air supply hole, and a negative pressure applying hole for applying a negative pressure to the outside. It is a combination of a passage hole, a supply restricting portion is interposed in a cleaning liquid supply path that connects the mixing nozzle and the cleaning liquid tank, and the negative pressure applying hole is connected to the supply restricting portion. The supply restricting section operated by the negative pressure to be applied may be configured to suck the cleaning liquid supplied and stored in advance from the cleaning liquid tank into the passage hole from the cleaning liquid supply hole in a fixed amount.

  In this case, the supply limiting unit includes a first cylinder and a first piston, a second cylinder and a second piston, a connecting shaft for interlocking the second piston and the first piston, and a second piston displacement destination of the second cylinder. A receiving side supply port for connecting the cleaning liquid supply path to the cleaning liquid supply path, a feed side supply port for connecting a 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 negative pressure applying hole A negative pressure application port that connects the extending negative pressure application path to the first piston displacement destination of the first cylinder, and interlocks with the first piston that is displaced by the negative pressure applied from the negative pressure application hole through the negative pressure application path. The second piston is displaced, and the cleaning liquid previously supplied from the cleaning liquid tank and stored in the second piston displacement destination of the second cylinder is pushed out to the cleaning liquid delivery path by the second piston, Wash solution can show a configuration for sucking only quantified passage hole from the cleaning liquid supply hole.

  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.

  According to the present invention, a mixing nozzle capable of generating a large amount of microbubbles by mixing water, a cleaning liquid and air can be provided. Can be provided. First, the mixing nozzle generates a large amount of microbubbles by using the negative pressure generated at the step of the passage hole to suck not only the air but also the cleaning liquid and directly mix the water and the cleaning liquid or air. It is an effect. Furthermore, by providing a water-permeable stirring unit in the discharge unit, more microbubbles can be generated. This also has the effect of directly mixing water and cleaning liquid or air. The effect by.

  By using the mixing nozzle, the hand-washing device is more likely to generate microbubbles than in the prior art and enables good hand-washing. Furthermore, by being able to configure a supply restricting unit that utilizes suction of the mixing nozzle, for example, the hand is washed with microbubbles in which water and cleaning liquid or air are mixed for a certain period of time from the start of dispensing water, and the certain period of time has elapsed. After that, you can rinse your hands with microbubbles mixed with water and air. Thereby, for example, it is possible to smoothly proceed from the supply of the cleaning liquid necessary for hand washing to the rinsing only by operating the faucet. This is an effect particularly suitable for the case where the supply amount of the cleaning liquid is automatically limited in an automatic hand-washing apparatus that starts to discharge water by sensing a hand with a sensor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a vertical sectional view showing an example of a mixing nozzle 1 for a hand-washing apparatus according to the present invention, FIG. 2 is a plan view of the mixing nozzle 1, and FIG. It is a side view. The number of the passage holes 11 of the mixing nozzle 1 and what each of them is sucked are arbitrary, but the mixing nozzle 1 of this example has one passage hole 11 at the center in plan view, and surrounds the passage holes at equal intervals in the circumferential direction. There are four passage holes 11, a total of five passage holes 11. Then, the water W fed from the tap 7 is used as a main liquid, the air A which is a gas is sucked in two of the peripheral passage holes 11, and the cleaning liquid which is a sub-liquid in the remaining two passage holes 11. L is sucked (see FIG. 7 or FIG. 9, the same applies hereinafter). The central passage hole 11 generates a negative pressure that activates supply restriction units 4 and 5 described later.

  As shown in FIGS. 1 to 3, the mixing nozzle 1 is connected to a tap faucet 7 and introduces an inlet 12 that feeds water W, a mixer 13 that mixes cleaning water L and air A into the water W, The discharge part 14 which discharge | releases the microbubble B produced | generated by mixing the water W, the washing | cleaning liquid L, and the air A consists of. The introduction part 12 has a female screw part 121 for connection to a male screw part (not shown) provided outside the faucet in place of a nozzle attached to the existing faucet, and has a lower end of the faucet. An annular seal ring 122 is press-contacted to the interior. The discharge portion 14 is a cylindrical member formed on the upper inner surface with a female screw portion 141 formed on the outer surface of the mixing portion 13 provided integrally with the introduction portion 12 and protruding downstream, and screwed to the male screw portion 131. An annular seal ring 142 that press-contacts the lower end of the mixing portion 13 is provided, and a metal perforated plate 144 (punching metal) 144 and a plurality of metal meshes 145 (including the metal mesh in FIG. 1) are provided directly below the seal ring 142. A stirrer 143 in which a cylindrical shape 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 stirring unit 143 only needs to collide the water W discharged through the mixing unit 13 and stir the water W, the cleaning liquid L, and the air A. For example, the agitation unit 243 of the mixing nozzle 2 shown in FIG. 4 includes a metal scrub 244 housed in the discharge unit 24 and a metal mesh 245 that holds the metal scrub 244 in the discharge unit 24. The metal scrubber 244 easily stirs the water W, the cleaning liquid L, and the air A because the metal thin wires are intertwined randomly, and generates a large amount of fine microbubbles B. The stirring unit 343 of the mixing nozzle 3 shown in FIG. 5 is a metal cap 345 having a water passage hole 344 opened, and water W collides with the inner bottom surface of the metal cap 345 so that the inside of the metal cap 345 The water W, the cleaning liquid L, and the air A are agitated to generate a large amount of macro bubbles B. The microbubbles B overflow from the water passage holes 344 and are discharged from the discharge unit 34 when the volume in the metal cap 345 exceeds the volume. In order to assist the stirring of the water W, the cleaning liquid L, and the air A in the stirring units 243 and 343, a separate vent hole may be provided in the discharge units 24 and 34 so that air can be drawn in auxiliary.

  The mixing unit 13 is configured integrally with the introduction unit 12 and separates the introduction unit 12 and the discharge unit 14, and as described above, a total of five passage holes 11 are provided at the center and the periphery in plan view. Yes. 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. In the discharge side hole 112 in the vicinity of the step 113 in the shape of the truncated cone side surface formed by connecting the introduction side hole 111 and the discharge side hole 112, a negative pressure applying hole 114 (the central passage hole 11), A cleaning liquid supply hole 115 or an air supply hole 116 (peripheral passage hole 11) is provided. The negative pressure application hole 114, the cleaning liquid supply hole 115, and the air supply hole 116 extend horizontally in the radial direction, and the negative pressure application path 61 and the cleaning liquid supply path 62 (examples of supply restriction units 4 and 5 described later) on the outer surface of the mixing unit 13. Then, the cleaning liquid delivery path 621) or the air supply path 64 is connected. As a result, the supply restriction units 4 and 5 are operated by the negative pressure P applied through the negative pressure application path 61, and the cleaning liquid L is supplied to the cleaning liquid tank 8 or the limited supply part 4 through the cleaning liquid supply path 62 connected to the cleaning liquid supply hole 115. , 5 is sucked into the passage hole 11, and 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 in each passage hole 11. And mix.

  The mixing nozzle 1 of the present invention 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 forms 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 pressurized water W 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 microbubble B generated by mixing the cleaning liquid L and the air A with the water W has 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.

  FIG. 6 is a partial cross-sectional view of the handwashing apparatus in which the restriction supply unit 4 is set in the cleaning liquid tank 8 before discharge of water W, FIG. 7 is a partial cross-sectional view of the handwashing apparatus during discharge of water, and FIG. FIG. 9 is a partial cross-sectional view showing the water before being discharged from the hand-washing apparatus provided with the restriction supply unit 5 integrated with the nozzle 1, and FIG. 9 is a partial cross-sectional view showing the water being discharged from the hand-washing apparatus. The mixing nozzle 1 of the present invention uses a strong negative pressure P to suck not only the air A but also the cleaning liquid L, mixes the water W, the cleaning liquid L, and the air A, and discharges a large amount of microbubbles B. However, in this example, the supply restriction unit 4 that supplies the cleaning liquid L in a fixed amount is further operated by using the negative pressure P.

  6 includes a storage tank 41 set in the cleaning liquid L of the cleaning liquid tank 8, a supply port 411 connecting the inside of the storage tank 41 and the cleaning liquid supply path 62, and the inside of the storage tank 41. An intake port 412 that communicates with the outside, a stop valve 42 that closes the suction port 413 provided on the bottom surface of the storage tank 41 from below, and a diaphragm 43 that is connected to a negative pressure application path 61 that extends from the negative pressure application hole 114 The diaphragm 43 is provided in a displacement space 431 having a negative pressure application path 61 open on the upper surface. Diaphragm 43 is an elevating motion part that raises and lowers stop valve 42, and is normally pushed down by downward pressing spring 433, but is provided on the bottom surface of storage tank 41 by raising stop valve 42 by deformation due to negative pressure P. Close the inlet 413.

  The storage tank 41 is a container that determines the supply amount of the cleaning liquid L supplied to the mixing nozzle 1 at a time, and takes in the cleaning liquid L from the suction port 413 on the bottom surface that is normally open. The intake port 412 protrudes from the cleaning liquid tank 8 to the outside, and takes in air from the outside instead when the cleaning liquid L is sucked from the storage tank 41. The supply port 411 is connected to the passage hole 11 around the mixing nozzle 1 via the washing liquid supply path 62, and when a negative pressure P is generated in the passage hole 11, the washing liquid L inside the storage tank 41 is sucked into the periphery. To the passage hole 11. In this example, the flow rate adjustment valve 622 is provided in the cleaning liquid supply path 62 to limit the maximum flow rate of the cleaning liquid L, thereby suppressing fluctuations in the supply of the cleaning liquid L due to changes in suction force. The diaphragm 43 is given a negative pressure P generated in the passage hole 11 in the center of the mixing nozzle 1 through the negative pressure applying passage 61 and deforms upward so that the stop valve 42 connected by the connecting rod 432 is provided. Pull up. The stop valve 42 is displaced upward by the action of the diaphragm 43 and closes the suction port 413 provided on the bottom surface of the storage tank 41. When the cleaning liquid L is supplied from the supply port 411, the stop valve 42 enters the storage tank 41. So that the cleaning liquid L does not flow into.

  The operation of the supply restriction unit 4 in this example is as follows. When the water W is fed into the introduction part 12 of the mixing nozzle 1, as shown in FIG. 7, the water W is pushed into each passage hole 11 in a compressed state, and the cleaning liquid supply path 62, the air supply path 64, and the negative pressure A negative pressure P is applied to each of the applying paths 61. The negative pressure P applied to the negative pressure application path 61 is applied to the displacement space 431 provided in the upper part of the storage tank 41, and the diaphragm 43 is sucked and deformed upwards. Due to the deformation of the diaphragm 43, the stop valve 42 rises to close the suction port 413, and the storage tank 41 is sealed. Strictly speaking, the stop valve 42 rises when the negative pressure P exceeds the water pressure proportional to the depth at which the storage tank 41 is set. From now on, in order to always raise the stop valve 42 at a constant negative pressure P, for example, the storage tank 41 is constituted by a float, and the storage tank 41 is moved up and down in accordance with the remaining amount of the cleaning liquid L stored in the cleaning liquid tank 8. Good. Thus, in the storage tank 41 in which the suction port 413 is closed by the stop valve 42, the negative pressure P applied to the cleaning liquid supply path 62 is applied to the cleaning liquid L inside the storage tank 41 from the supply port 411 and sucked. At this time, since air is taken in from the intake port 411 instead of the sucked cleaning liquid L, the supply of the cleaning liquid L proceeds smoothly. However, since the suction port 413 is already blocked by the stop valve 42, the cleaning liquid L stored in the storage tank 41 is not sucked, and the supply amount of the cleaning liquid L supplied to the mixing nozzle 1 is the storage tank 41. Limited by volume.

  Here, after all the cleaning liquid L in the storage tank 41 is supplied, air may be sucked through the cleaning liquid supply path 62. However, since the mixing nozzle 1 of this example also has a function of sucking and mixing air in addition to the cleaning liquid L, there is no particular problem. Rather, after supplying a fixed amount of cleaning liquid L and generating a large amount of microbubbles B by mixing water W, cleaning liquid L and air A, and then finishing good hand washing, this time microbubbles of only water W and air A A large amount of B can be generated and the hands can be rinsed. The supply restriction unit 4 only needs to be able to supply a fixed amount of the cleaning liquid L for a fixed time after the water W starts to flow, and may supply air thereafter.

  When the water W is stopped, the water W flowing into the mixing nozzle 1 disappears, so that the negative pressure P generated in each passage hole 11 also disappears. As a result, the diaphragm 43 stops deforming and returns to the normal state, and the return of the diaphragm 43 also lowers the stop valve 42 to open the suction port 413. Then, while pushing out the air inside the storage tank 41 through the intake port 412, the cleaning liquid L is poured from the suction port 413, and the inside of the storage tank 41 is filled with the cleaning liquid L again. At this time, air may be taken into the storage tank 41 through the cleaning liquid supply path 62, but since the intake port 412 is provided in the storage tank 41, the taken-in air is released to the end. The inside of the storage tank 41 can be filled only with the cleaning liquid L. Thereby, fixed_quantity | quantitative_assay of the washing | cleaning liquid L sent out next can be protected. As described above, the supply restriction unit 4 of this example does not require an operation from the outside, and only supplies the cleaning liquid L corresponding to the storage tank 41 in response to the supply and stop of the water W to the mixing nozzle 1. Can be sent out.

  8 includes a first cylinder 51 and a first piston 512, a second cylinder 52 and a second piston 521, a connecting shaft 53 for interlocking the first piston 512 and the first piston 522, A receiving side supply port 523 connecting the second piston displacement destination 522 of the second cylinder 52 and the cleaning liquid supply path 62 and a cleaning liquid delivery path 621 extending from the cleaning liquid supply hole 115 of the mixing nozzle 1 are provided in the second cylinder 52. The feed side supply port 524 connected to the two piston displacement destination 522 and the negative pressure application port 513 connecting the negative pressure application path 61 extending from the negative pressure application hole 114 to the first piston displacement destination 512 of the first cylinder 51. It is a configuration. In this example, unlike the above example (see FIG. 6), the limiting supply unit 5 is configured separately from the cleaning liquid tank 8, and the introduction unit 12 of the mixing nozzle 1 is bent sideways so that the first is formed above the mixing nozzle 1. The cylinder 51 and the second cylinder 52 are integrally laminated in this order.

  The first cylinder 51 is a sealed space in which a first cylinder 515 that also serves as a liner that smoothes the displacement of the first piston 511 is surrounded by a lower block 54 and an intermediate block 55. A seal ring 516 is interposed at the joint between each block 54 and 55. The negative pressure application port 513 is provided in the lower block 54 and is open to the bottom surface of the first cylinder 51. By connecting a negative pressure application path 61 extending from the negative pressure application hole 114 of the mixing nozzle 1, the first cylinder is connected. Negative pressure P is applied to the first piston displacement destination 51 of 51. The first piston 511 is sucked and lowered by the negative pressure P.

  The second cylinder 52 is a sealed space surrounded by an intermediate block 55 and an upper block 56 of a second cylinder 525 that also serves as a liner that facilitates the displacement of the second piston 521, in order to ensure airtightness and watertightness. A seal ring 526 is interposed at the joint between the second cylinder 525 and each of the blocks 55 and 56. The receiving side supply port 523 and the feeding side supply port 524 are provided in the intermediate block 55 and open to the bottom surface of the second cylinder 52. The receiving side supply port 523 connects the cleaning liquid supply path 62 extending from the cleaning liquid tank 8 and supplies the cleaning liquid L to the second piston displacement destination 522 of the second cylinder 52. The feed side supply port 524 connects the cleaning liquid delivery path 621 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 522 of the second cylinder 52 to the mixing nozzle 1.

  The first piston 511 and the second piston 521 are flat resin discs whose outer peripheral surfaces are in sliding contact with the respective cylinders, and the first piston 511 is connected to the connecting shaft 53 that extends upward through the upper block 56. The second piston 521 is fixed to the lower end of the shaft 53 in the middle of the connecting shaft 53. A seal ring 531 for securing watertightness is attached to a portion of the connecting shaft 53 that penetrates the second cylinder 52. In this example, the height of the second cylinder 52 is made larger than that of the first cylinder 51, but the displacement amount of the first piston 511 is limited at a position where it abuts against the bottom surface of the first cylinder 51. Since the second piston 521 interlocked with the first piston 511 is displaced only by the displacement amount of the first piston 511, the second piston displacement destination 522 of the second cylinder 52 has a space larger than the cleaning liquid L that can be pushed out. Will be. This is provided with an air reservoir assuming that air is mixed from the cleaning liquid tank 8. Accordingly, even if air is mixed into the second cylinder 52 from the cleaning liquid tank 8, only the cleaning liquid L is pushed out from the bottom surface of the second cylinder 52 that opens the feed side supply port 524. The displacement of the piston 521 prevents air from being pushed out from the feed-side supply port 524 to the mixing nozzle 1. The capacity of the second piston displacement destination 522 of the second cylinder 52 having this air pool is preferably about 1.5 to 2 times the supply amount of the cleaning liquid L to be pushed out.

  In addition, the limiting supply unit 5 of this example sucks and lowers the first piston 511 by the negative pressure P, so that the first piston 511 and the second piston 521 are normally held above the cylinders 51 and 52, respectively. It is desirable that Accordingly, in this example, a return spring 532 formed of a coil spring that urges the connecting shaft 53 protruding through the upper block 56 in a direction opposite to the direction in which the first piston 511 and the second piston 521 are displaced by the negative pressure P. Is attached. Specifically, the return spring 532 is repelled upward from the upper surface of the upper block 56 and pushes up a nut 533 that is screwed to the connecting shaft 53, thereby causing the first piston 511 and the second piston 521 to move to the cylinders 51, Hold the position above 52. The repulsive force of the return spring 532 can be adjusted by the screwing position of the nut 533 with respect to the connecting shaft 53, and the repulsive force of the return spring 532 can be easily adjusted along with the deterioration over time. A stopper cover 534 is attached to the connecting rod 53 so as to cover the return spring 532 so that the return spring 532 is not over-compressed.

  The operation of the supply restriction unit 5 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 second piston displacement destination 522 of the second cylinder 52. When water W is fed into the introduction part 12 of the mixing nozzle 1, as seen in FIG. 9, the water W is pushed into each passage hole 11 in a compressed state, and the cleaning liquid delivery path 621, the air supply path 64, and the negative pressure A negative pressure P is applied to each of the applying paths 61. The negative pressure P applied to the negative pressure application path 61 is applied from the negative pressure application path 61 to the first piston displacement destination 512 of the first cylinder 51 through the negative pressure application port 513, and the negative pressure P is repelled by the return spring 532. By sucking the first piston 511 against the force, the first piston 511 is displaced downward. Accordingly, the second piston 521 is also displaced downward in conjunction with the first piston 511, and the cleaning liquid L stored in the second cylinder displacement destination 522 of the second cylinder 52 is pushed out from the feed side supply port 524.

  At this time, it appears that the cleaning liquid L is also sent out to the receiving side supply port 523 connected to the cleaning liquid tank 8 by the lowering of the second piston 521, but since the negative pressure P is acting on the receiving side supply port 523, the cleaning liquid L Will be pushed out only from the feed side supply port 524. That is, the extrusion of the second piston 521 and the negative pressure P of the feed side supply port 524 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 521, 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 adjusting valve 623 is provided in the cleaning liquid delivery path 621 so that the cleaning liquid L is not supplied at one time.

  The flow rate adjusting valve 623 not only restricts the cleaning liquid L supplied at a time, but also functions to limit the negative pressure P applied to the second piston displacement destination 522 of the second cylinder 52 through the cleaning liquid delivery path 621. 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 521 enters the mixing nozzle 1 through the cleaning liquid delivery path 621. Will be supplied. This means that the cleaning liquid L and the air remaining in the second cylinder 52 are not supplied to the mixing nozzle 1 when the second piston 521 is displaced. Thus, the air in the second cylinder 52 is not sent to the mixing nozzle 1, and the cleaning liquid L is additionally supplied from the cleaning liquid tank 8 to the second cylinder 52 while the microbubbles B are generated by the mixing nozzle 1. It can be prevented from being taken in.

  When the water W is stopped, the water W flowing into the mixing nozzle 1 disappears, so that the negative pressure P generated in each passage hole 11 also disappears. As a result, the first piston 511 and the second piston 521 are pushed upward by the return spring 532 and returned to their original positions. At this time, the volume change of the second piston displacement destination 522 of the second cylinder 52 accompanying the displacement of the second piston 521 generates a large negative pressure, and the cleaning liquid L is replenished from the cleaning liquid tank 8 through the cleaning liquid supply path 62. Become. At this time, a check valve 527 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 621 so that air is not taken into the second cylinder 52 via the cleaning liquid delivery path 621. It is built in the feed side supply port 524. Similarly, in order to prevent air from flowing into the cleaning liquid tank 8 from the second cylinder 52, the cleaning liquid supply path 62 receives the check valve 528 that communicates only in the direction in which the cleaning liquid L is supplied toward the second cylinder 52. Built in port 523. As described above, the supply restricting unit 5 of the present example does not require any external operation, and the cleaning liquid stored in the second cylinder 52 in response to the feeding and stopping of the water W to the mixing nozzle 1. L is sent out in a fixed amount, and the second cylinder 52 can be automatically replenished with the cleaning liquid L.

  In order to confirm the degree of negative pressure generated by the mixing nozzle of the present invention, a mixing nozzle corresponding to FIGS. 1 and 2 was made as a prototype, and attached to a water tap as shown in FIG. First, the negative pressure per passage hole was measured, and secondly, the supply amount (suction amount) of the cleaning liquid per passage hole was measured. The prototype mixing nozzle has a configuration in which one passage hole is provided in the center in plan view, and four passage holes are provided at equal intervals in the circumferential direction around the passage hole, with the central passage hole being the introduction side. The hole has a diameter of 1.1 mm, a length of 1.5 mm, the discharge side hole has a diameter of 1.8 mm, and a length of 9.0 mm. The peripheral passage hole has a diameter of 1.0 mm, a length of 1.5 mm, and the discharge side hole has a diameter of 1.8 mm and a length of 9.0 mm. mm. The air supply hole and the cleaning liquid supply hole for each passage hole are both 1.8 mm in diameter and provided at a height of 7.5 mm from the lower end of the discharge side hole.

  First, FIG. 10 is a graph showing the results of measurement of the relationship between the amount of water and negative pressure. The negative pressure increases according to the amount of water in each of the central hole and the peripheral holes until the amount of water fed into the introduction part is around 2.0 L / min. To 3.4 L / min. It has settled down to about 1 atm negative pressure (-100 kPa) from above. From this, it can be seen that if a sufficient amount of water is fed, a very large negative pressure can be obtained, and even if the amount of water is somewhat small, a larger negative pressure is obtained than in the prior art. Here, in the range of the amount of water in which the negative pressure tends to increase (2.0L / min. To 3.4L / min.), The negative pressure is slightly larger in the central passage hole because the introduction side hole is larger. It seems that the negative pressure generated at the level difference increased because the amount of compressed water increased.

  Next, FIG. 11 shows a graph of measurement results regarding the relationship between the amount of water and the supply amount of cleaning liquid. As for the supply amount of the cleaning liquid, the amount of water increases in a substantially proportional relationship from 2.0 L / min. To 4.0 L / min. The reason why the relationship between the amount of water and the negative pressure does not completely coincide is that the cleaning liquid is heavier than air and is viscous. Nevertheless, since a supply amount of 200 mL / min. Can be expected even when the amount of water is small, it can be said that the suction of the cleaning liquid by the mixing nozzle of the present invention has necessary and sufficient practicality. As a result, it can be said that it has been confirmed that the mixing nozzle capable of sufficiently sucking the viscous cleaning liquid can be used not only as a hand washing apparatus but also as an apparatus for mixing the main liquid and the sub-liquid or gas.

  The mixing nozzle of the present invention can be suitably used for a hand washing apparatus. In this case, the main liquid is water, a cleaning liquid is used as the sub-liquid, and air is used as the gas. However, as is clear from the above test results, since the negative pressure generated by the mixing nozzle is large, it is possible to mix only the main liquid and the sub liquid. Moreover, the mixing nozzle of the present invention can not only simply mix the main liquid and sub liquid, but also generate microbubbles upon discharge from the passage hole, and stir the main liquid and sub liquid together. Thus, the mixing nozzle of the present invention can be used in an apparatus for mixing liquids that are normally difficult to mix.

It is the vertical sectional view showing an example of the mixing nozzle for hand-washing devices based on the present invention. It is a top view of the mixing nozzle. It is a side view of the mixing nozzle of the state with which the water tap was mounted | worn. FIG. 5 is a vertical cross-sectional view corresponding to FIG. 1 showing a mixing nozzle having another stirring unit. FIG. 5 is a vertical cross-sectional view corresponding to FIG. 1 showing a mixing nozzle having another stirring unit. It is a fragmentary sectional view showing before the discharge of the water of the hand-washing apparatus which set the limit supply part in the washing | cleaning-liquid tank. 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 water of a hand-washing apparatus which provided a restriction supply part integral with a mixing nozzle. It is a fragmentary sectional view showing during discharge of the water of the hand-washing apparatus. It is a graph of the result measured about the relationship between the amount of water and negative pressure. It is a graph of the result measured about the relationship between the amount of water and the supply amount of a washing | cleaning liquid.

Explanation of symbols

1 Mixing nozzle
11 Through hole
111 Introduction side hole
112 Discharge side hole
113 steps
114 Negative pressure application hole
115 Cleaning fluid supply hole
116 Air supply hole
12 Introduction
13 Mixing section
14 Discharge part
143 Stirrer 2 Alternative mixing nozzle 3 Alternative mixing nozzle 4 Restricted supply unit
41 Reservoir
411 Supply port
412 Intake port
413 inlet
42 Stop valve
43 Diaphragm
431 Displacement space
432 Connecting rod 5 Restricted supply section
51 1st cylinder
511 1st piston
512 First piston displacement destination
513 Negative pressure application port
52 2nd cylinder
521 2nd piston
522 Second piston displacement destination
523 Receiver supply port
524 Feeding side supply port
53 Connecting shaft
532 Return spring
533 nuts
54 Lower block
55 Intermediate block
56 Upper block
61 Negative pressure application path
62 Cleaning fluid supply path
621 Cleaning liquid delivery path
63 Water supply channel
64 Air supply path 7 Water faucet 8 Cleaning liquid tank W Water L Cleaning liquid A Air B Micro bubble P Negative pressure

Claims (8)

It consists of an introduction part for sending main liquid, a mixing part for mixing sub liquid or gas with the main liquid, and a discharge part for discharging bubbles generated by mixing the main liquid and sub liquid or gas,
The mixing portion is provided with a passage hole that communicates the introduction portion and the discharge portion while isolating the introduction portion and the discharge portion, and the passage hole has an introduction side hole that has a smaller cross-sectional area than the introduction portion and a cross-sectional area that is smaller than that of the discharge portion. A sub-liquid supply hole or a gas supply hole is formed in the discharge side hole near the step formed by connecting the discharge side hole having a smaller cross-sectional area than the introduction side hole and connecting the introduction side hole and the discharge side hole. A mixing nozzle that is connected and generates a negative pressure at the step by the main liquid passing through the passage hole, and sucks the sub liquid from the sub liquid supply hole to the passage hole, or sucks gas from the gas supply hole to the passage hole. Because
A mixing nozzle comprising a plurality of passage holes and a combination of a passage hole not provided with a sub liquid supply hole and a gas supply hole and a passage hole provided with a sub liquid supply hole or a gas supply hole. It consists of an introduction part for sending main liquid, a mixing part for mixing sub liquid or gas with the main liquid, and a discharge part for discharging bubbles generated by mixing the main liquid and sub liquid or gas,
The mixing portion is provided with a passage hole that communicates the introduction portion and the discharge portion while isolating the introduction portion and the discharge portion, and the passage hole has an introduction side hole that has a smaller cross-sectional area than the introduction portion and a cross-sectional area that is smaller than that of the discharge portion. A sub-liquid supply hole or a gas supply hole is formed in the discharge side hole near the step formed by connecting the discharge side hole having a smaller cross-sectional area than the introduction side hole and connecting the introduction side hole and the discharge side hole. A mixing nozzle that is connected and generates a negative pressure at the step by the main liquid passing through the passage hole, and sucks the sub liquid from the sub liquid supply hole to the passage hole, or sucks gas from the gas supply hole to the passage hole. Because
A mixing nozzle characterized in that there are a plurality of passage holes, and each passage hole is provided with either a sub liquid supply hole or a gas supply hole. A hand washing apparatus comprising a mixing nozzle and a cleaning liquid tank, wherein the mixing nozzle is connected to a faucet of a water supply and feeds water, a mixing section for mixing the cleaning liquid or gas with the water, water and cleaning liquid or air And a discharge part that discharges bubbles generated by mixing the mixing part, the mixing part is provided with a passage hole that communicates the introduction part and the discharge part while isolating the introduction part and the discharge part, and the passage hole is the introduction part It is formed by connecting an introduction side hole having a smaller cross-sectional area and a discharge side hole having a cross-sectional area smaller than that of the discharge part and having a cross-sectional area larger than that of the introduction side hole, and connecting the introduction side hole and the discharge side hole. A cleaning liquid supply hole or air supply hole is provided in the discharge side hole near the step, and negative pressure is generated in the step by the 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 supply air to the outside A hand washer device for sucking air from,
The mixing nozzle has a plurality of passage holes, and is a combination of a passage hole provided with a cleaning liquid supply hole or an air supply hole and a passage hole provided with a negative pressure applying hole for applying a negative pressure to the outside. A supply restricting portion is interposed in the cleaning liquid supply path connecting the tank, the negative pressure applying hole is connected to the supplying restricting portion, and the supply restricting portion operated by the negative pressure given by the negative pressure applying hole is the cleaning liquid. A hand-washing apparatus, wherein the amount supplied from the tank is limited, and the cleaning liquid is sucked from the cleaning liquid supply hole into the passage hole by a fixed amount. A hand washing apparatus comprising a mixing nozzle and a cleaning liquid tank, wherein the mixing nozzle is connected to a faucet of a water supply and feeds water, a mixing section for mixing the cleaning liquid or gas with the water, water and cleaning liquid or air And a discharge part that discharges bubbles generated by mixing the mixing part, the mixing part is provided with a passage hole that communicates the introduction part and the discharge part while isolating the introduction part and the discharge part, and the passage hole is the introduction part It is formed by connecting an introduction side hole having a smaller cross-sectional area and a discharge side hole having a cross-sectional area smaller than that of the discharge part and having a cross-sectional area larger than that of the introduction side hole, and connecting the introduction side hole and the discharge side hole. A cleaning liquid supply hole or air supply hole is provided in the discharge side hole near the step, and negative pressure is generated in the step by the 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 supply air to the outside A hand washer device for sucking air from,
The supply restriction unit includes a storage tank that is set in the cleaning liquid of the cleaning liquid tank, a supply port that connects the inside of the storage tank and the cleaning liquid supply path, an intake port that connects the inside of the storage tank and the outside, and a storage tank It consists of a stop valve that closes the suction port provided on the bottom from below, and an elevating part connected to a negative pressure application path that extends from the negative pressure application hole. The amount of supply from the cleaning liquid tank is blocked by displacing the stop valve upward by an up-and-down moving part that rises due to the negative pressure applied through the negative pressure application path from the negative pressure application hole and shuts off the flow of cleaning liquid from the suction port Is limited to the storage amount of the storage tank, and the cleaning liquid of the storage amount is sucked into the passage hole from the cleaning liquid supply hole. The hand-washing apparatus according to claim 4, wherein the elevating and lowering movement unit is a diaphragm in which a connecting rod extending upward from the stop valve is connected to the lower surface, and a displacement space in which the negative pressure applying path end is opened on the upper surface. A hand washing apparatus comprising a mixing nozzle and a cleaning liquid tank, wherein the mixing nozzle is connected to a faucet of a water supply and feeds water, a mixing section for mixing the cleaning liquid or gas with the water, water and cleaning liquid or air And a discharge part that discharges bubbles generated by mixing the mixing part, the mixing part is provided with a passage hole that communicates the introduction part and the discharge part while isolating the introduction part and the discharge part, and the passage hole is the introduction part It is formed by connecting an introduction side hole having a smaller cross-sectional area and a discharge side hole having a cross-sectional area smaller than that of the discharge part and having a cross-sectional area larger than that of the introduction side hole, and connecting the introduction side hole and the discharge side hole. A cleaning liquid supply hole or air supply hole is provided in the discharge side hole near the step, and negative pressure is generated in the step by the 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 supply air to the outside A hand washer device for sucking air from,
The mixing nozzle has a plurality of passage holes, and is a combination of a passage hole provided with a cleaning liquid supply hole or an air supply hole and a passage hole provided with a negative pressure applying hole for applying a negative pressure to the outside. A supply restricting portion is interposed in the cleaning liquid supply path connecting the tank, the negative pressure applying hole is connected to the supply restricting portion, and the supply restricting portion operated by the negative pressure given by the negative pressure applying hole is previously provided. A hand-washing apparatus, wherein the cleaning liquid supplied and stored from the cleaning liquid tank is sucked in a fixed amount from the cleaning liquid supply hole into the passage hole. 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 second piston and the first piston, a second piston displacement destination of the second cylinder, and a cleaning liquid supply. A receiving side supply port connecting the passage, a cleaning liquid delivery path extending from the cleaning liquid supply hole of the mixing nozzle, a feed side supply port connecting the second piston displacement destination of the second cylinder, and a negative pressure extending from the negative pressure applying hole A negative pressure application port that connects the application path to the first piston displacement destination of the first cylinder, and is linked to the first piston that is displaced by the negative pressure applied through the negative pressure application path from the negative pressure application hole. The piston is displaced, and the cleaning liquid previously supplied from the cleaning liquid tank and stored in the second piston displacement destination of the second cylinder is pushed out to the cleaning liquid delivery path by the second piston, and the cleaning liquid is discharged. Washing liquid to pass through holes from the supply hole and sucked by quantitative composed claim 6 handwashing device according. 8. The hand washing apparatus according to claim 7, wherein the first piston and the second piston are attached to a connecting shaft with a return spring that urges the first piston and the second piston in a direction opposite to the direction displaced by the negative pressure.

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