JP5196189B2 - Water discharge device - Google Patents

Description

  The aspect of this invention is related with the water discharging apparatus.

  Conventionally, water spouting devices such as a water discharging device for washing parts of the human body, a shower device for washing away dirt on the body, a dishwasher for washing away dirt on dishes, a faucet device for washing hands, a washing machine for washing laundry, etc. Thus, there is known a water discharging device that removes dirt from an object to be cleaned.

  In order to remove dirt adhering to the object to be cleaned, the dirt adhering to the object to be cleaned is lifted from the object to be cleaned by the impact force of the washing water landing on the object to be cleaned, and the floated dirt is removed. It was necessary to wash away with washing water.

  In order to increase the impact force when the washing water lands on the object to be washed, it is necessary to increase the speed at which the washing water lands. On the other hand, to wash away the floating dirt with the washing water, There was a need to increase the amount.

If a large amount of water is discharged at a high speed, high dirt removal performance can be ensured. On the other hand, since a large amount of water is required for one cleaning, further improvement is required from the viewpoint of saving water.
For example, the following techniques are known for the discharge of cleaning water in a sanitary cleaning device.

Here, a hygiene equipped with a pressure generating section that causes a pulsation transition such that pressure higher than the water discharge pressure obtained from the water supply source is intermittently generated so that high cleaning performance can be obtained even if the amount of water used is reduced. A cleaning device has been proposed (see Patent Document 1).
According to the sanitary washing device disclosed in Patent Document 1, it is possible to perform water discharge such that the speed increases and the pulsating flow repeatedly appears by causing the pulsation transition of pressure.

  Therefore, a large water discharge group in which parts having different speeds are combined after water discharge can be landed on the object to be cleaned. That is, a large water discharge group is formed by catching up with a part having a high speed and a part having a low speed discharged before that, and even when a small amount of water is discharged, it is large at the time of landing on the object to be cleaned. The present invention discloses an excellent technique that can provide a comfortable cleaning performance even with a small amount of water because it is a water discharge group.

  However, in the technique disclosed in Patent Document 1, the power to remove dirt (the ability to lift dirt adhered to the object to be cleaned by the impact of the washing water from the object to be cleaned) and the power to wash out dirt (to wash the dirt that has floated) There was a problem that there was a trade-off relationship with the performance of washing with water. Specifically, the speed of water discharge is reduced by making a large water discharge group due to the difference in the speed of water discharge, so the power to wash away dirt is improved, but the power to remove dirt is reduced, and conversely the power to remove dirt is increased. Therefore, further improvement is desired in order to provide higher cleaning performance. The present inventors have been intensively researching and developing whether it is possible to provide higher cleaning performance with a small amount of water.

  Here, the present inventors have also studied a technique such as that of Patent Document 2 in order to realize high cleaning performance that achieves both the ability to wash away dirt and the ability to remove dirt.

  Patent Document 2 discloses a sanitary washing device in which water ejected from an orifice portion is ejected straight toward a water discharge hole, passes through an air suction portion, and is discharged from the water discharge hole (Patent Document 2). [See claim 1], paragraphs [0006] to [0014], FIG.

  According to the sanitary washing device disclosed in Patent Document 2, the surface of the water continuously discharged is disturbed by the air sucked by the air suction effect (ejector effect) by the jet, and the water is thin and thick. Is formed. In other words, the portion where the water has become thick is water-tight, and the water is discharged with a large force to wash away dirt when it reaches the object to be cleaned. Furthermore, since it is ejected straight from the orifice that produces the ejector effect toward the water discharge hole, energy loss due to water colliding with the nozzle inner wall surface can be reduced. It can be suppressed. Compared with the conventional sanitary washing device for continuous water discharge, this is an excellent technique capable of providing a high washing performance that achieves both the ability to wash away dirt and the ability to remove dirt.

  However, in the technique disclosed in Patent Document 2, in addition to the problem that a large amount of water is used because of the configuration for performing continuous water discharge, a device for producing an ejector effect is required. There were problems in terms of increase in size and cost. In addition, it creates a force to wash away dirt by causing disturbance of the water surface due to the ejector effect, and creates a force to remove dirt by suppressing the degree of speed reduction of the water obtained by the water supply pressure. There is a limit to increasing the sharpness of the power to wash away and the power to remove dirt, and improvements were also desired from the viewpoint of providing a high level of cleaning performance.

  Similarly, Patent Document 2 filed by the applicant of the present application discloses a sanitary cleaning device in which cleaning water is ejected from an orifice portion toward a water discharge hole, passes through a resonance chamber, and is discharged from the water discharge hole. (See [Claim 8], [0026] and [0027] paragraphs of Patent Document 2, FIG. 13 and the like).

  The sanitary washing apparatus disclosed in Patent Document 2 utilizes the fact that when the cleaning water is ejected from the orifice portion, the resonance chamber becomes negative pressure, and the cleaning water is pulled to the negative pressure of the resonance chamber, so that the water discharge is conical. It is configured to expand into a shape. On the other hand, when the negative pressure inside the resonance chamber becomes a certain level or higher, the atmosphere is drawn from the water discharge hole, and the resonance chamber becomes a positive pressure, and the water discharge becomes a straight water discharge that is blown out from the orifice portion without being expanded. When this conical expanded water reaches the object to be cleaned, the water discharge cross-sectional area increases, giving a force to wash away certain dirt, and when a linear water discharge reaches the object to be cleaned, it gives a force to remove the dirt. It is something that can be done. In addition, the structure is such that the conical expanded water discharge and the linear water discharge are alternately performed, so that it is possible to wash away dirt with a small amount of water and dirt as compared with a conventional continuous water discharge sanitary washing device. This is an excellent technology that can provide a certain level of cleaning performance that is compatible with the ability to drop water.

  However, the technique disclosed in Patent Document 2 has a problem in that it requires a large amount of water to be used because there is no change in the configuration in which continuous water discharge is performed. Further, the water discharge is expanded when the water is discharged from the water discharge hole using the negative pressure of the resonance chamber, and the cross-sectional area of the cleaning water is increased to create a force for washing away the dirt. Therefore, at the time of landing on the object to be cleaned, the cross-sectional area becomes too large and uncomfortable, or the expansion amount changes depending on the amount of negative pressure. Since the speed of water discharge is greatly reduced by the expansion, there is also a problem that even if the water discharge cross-sectional area is large, the speed decrease becomes too large to provide sufficient force to wash away dirt. Moreover, it is the structure which produces the force which suppresses the grade of the speed fall of the washing water by using a feed water pressure, and thereby removes dirt. For this reason, there is a limit to increasing the sharpness of the power to wash off the dirt and the power to remove the dirt, and improvement has been desired from the viewpoint of providing a high level of cleaning performance.

Japanese Patent No. 3264274 JP 2002-155567 A

  The present invention has been made on the basis of recognition of such a problem, and the present invention can increase both the power to wash away dirt and the power to remove dirt with a smaller amount of water used, and has achieved an unprecedented high level of cleaning. An excellent water discharge device capable of providing performance is provided.

  1st invention is a water discharging apparatus provided with the water discharging means which discharges water, and the nozzle provided in the downstream from the said water discharging means and having the water discharging hole which discharges the said water, The said water discharging means is 1st. The first water discharge is configured such that the water discharged from the water discharge hole is not expanded in a conical shape when water is discharged from the nozzle. And the water discharge cross-sectional area is larger than that of the second water discharge after the water discharge, and the second water discharge has a conical shape when water discharged from the water discharge hole is discharged from the nozzle. It is comprised so that it may not be extended, and it is comprised so that it may become a speed faster than said 1st water discharge after water discharge, Furthermore, the said water discharge means differs in the timing from which said 1st water discharge and 2nd water discharge differ It is configured to discharge water at It is an.

  According to this water discharge device, the first water discharge is performed so that the water discharge cross-sectional area is larger than the second water discharge without expanding and discharging into a conical shape, and without expanding and discharging into a conical shape. The second water discharge discharged at a faster speed than the first water discharge can be alternately discharged by the water discharge means. Therefore, it is possible to increase both the power to remove dirt and the power to wash away dirt by efficiently using a small amount of water used, and high cleaning power can be obtained. Moreover, the 1st water discharge and the 2nd water discharge are discharged from the water discharge hole, without expanding conically. Therefore, the washing water does not spread extensively after water is discharged from the water discharge hole, and the washing water can be concentrated on the object to be washed. In addition, the object to be cleaned can be cleaned efficiently using a small amount of water. Moreover, since the speed reduction of water discharge can also be suppressed, it is possible to reliably wash away a wide range of dirt as the water discharge cross-sectional area increases, and to provide very high cleaning performance.

  The second invention is characterized in that the first water discharge and the second water discharge are alternately discharged from the same water discharge hole so as to overlap at a predetermined position determined in advance.

  According to this water discharge device, the first water discharge and the second water discharge are discharged without being expanded from the water discharge hole, and the cleaning water is concentrated at a predetermined position where the object to be cleaned is desired to be cleaned. Can be landed. Therefore, it can wash | clean efficiently with very little usage-amount of water. In addition, since the water discharge with increased dirt washing power and the water discharge with higher dirt removal power are alternately sprayed from the same water discharge hole, the amount of water used can be greatly reduced, and a predetermined amount of water can be reduced. Since the water discharge can be reliably concentrated at the position where the cleaning object is desired to be cleaned, the object to be cleaned can be surely washed with the water discharge having both the power to wash away the dirt and the power to remove the dirt.

  Here, “alternate water discharge” is not limited to the first water discharge and the second water discharge, but the first water discharge and the second water discharge. In the meantime, the water discharged between the first water discharge or the second water discharge is also expressed alternately.

  According to a third aspect of the present invention, the water discharging means includes a space between the water discharge hole and the predetermined position so that the first water discharge has a larger water discharge cross-sectional area than the second water discharge at a predetermined position determined in advance. In the case where the first water discharge starts so that the amount of catch-up that the water discharged later catches up with the water discharged earlier is larger than that of the second water discharge. The initial speed is slower than the initial speed at the time when the second water discharge starts, and the initial speed at the time when the first water discharge ends is slower than the initial speed at the time when the second water discharge ends, In the second water discharge, the water discharged later catches up with the water discharged earlier from the water discharge hole to the predetermined position so as to be faster than the first water discharge at the predetermined position. The amount of attached water is less in the second water discharge than in the first water discharge As such, the initial speed at the time when the second water discharge starts is faster than the initial speed at the time when the first water discharge starts, and the initial speed at the time when the second water discharge ends is the second water discharge. It is configured to be faster than the initial speed at the end.

  According to this water discharge device, the first water discharge and the second water discharge are configured to discharge water at different timings by changing the initial speed at the time of water discharge. The time to reach can be changed. Therefore, it is possible to vary the size when the wash water discharged later catches up with the wash water discharged earlier to form a water discharge group. In addition, it is possible to generate two water discharge groups with different configurations and different water discharge cross-sectional areas and different speeds upon landing. Accordingly, it is possible to perform cleaning using a water discharge group in which the water discharge cross-sectional area is large and the speed is slow, and a water discharge cross-sectional area is small and a decrease in the speed is suppressed, so that the water discharge group is faster. Therefore, it is possible to perform good cleaning with a very small amount of water with a simple configuration. Moreover, it becomes possible to give a big speed difference from what was mentioned above, and it is possible to reliably perform more clear water discharge with a simple configuration. Therefore, also from this point, it is possible to perform water discharge that has both the power to remove high dirt and the power to wash out high dirt, so it has become possible to perform cleaning at a higher level than ever before. .

  The “initial speed” referred to here expresses the speed when the first water discharge or the second water discharge starts discharging water from the water discharge holes, respectively.

  According to a fourth aspect of the present invention, the water discharge means is configured to discharge the second water discharge so that an increase rate of a change in initial speed is smaller than that of the first water discharge. is there.

  According to this water discharge device, by suppressing the increase rate of the change in the speed of the second water discharge, it is possible to suppress the speed of the water discharged later from being excessively high with respect to the previous water discharge. it can. Therefore, since the amount of catch-up can be suppressed, it is possible to more remarkably prevent the speed from decreasing due to an excessively large water discharge group. Therefore, it is possible to perform cleaning at a higher level than ever before.

  According to a fifth aspect of the present invention, the water discharge means discharges water by pressurization, and the first pressurization step and the first pressurization step are configured to discharge water different from the first pressurization step. The first water discharge is pressurized to have a larger water discharge cross-sectional area than the second water discharge at a predetermined position determined in advance by the first pressure step, The second water discharge is configured to be pressurized at the predetermined position so as to be faster than the first water discharge in the second pressurizing step. is there.

  According to this water discharger, in order to perform two different water discharges, there are two pressurization steps, and water discharge that is optimally T-shaped in each step is formed. Therefore, the first water discharge having a large water discharge cross-sectional area and the second water discharge having a high speed can be generated efficiently and reliably.

  According to a sixth aspect of the invention, the water discharging means discharges water by pressurization, a first pressurizing unit that performs the first pressurizing step, and a second that performs the second pressurizing step. The pressurizing part is provided.

  In this water discharge device, the first pressurizing unit and the second pressurizing unit, which are mechanisms for further pressurizing water, are provided separately, so that two more sharp water discharges can be performed. Thus, it is possible to easily realize both the power to wash away higher dirt and the power to remove dirt.

  In a seventh aspect of the present invention, the second pressurizing unit has a pressurization amount set so that an initial speed of water discharge is faster than that of the first pressurizing unit.

  According to this water discharge device, it becomes possible to change the speed of the wash water discharged by an extremely simple configuration of changing the amount of pressurization by the pressurizing unit, and the effect of the sixth invention can be reliably achieved. .

  In an eighth aspect of the present invention, the flow path downstream of the second pressurizing unit is such that the second pressurizing unit has an initial velocity of water discharge that is faster than that of the first pressurizing unit. It is characterized by being configured to be smaller than the downstream flow path.

  According to this water discharge device, it is possible to change the speed of the discharged wash water by a very simple configuration in which the diameter of the flow path downstream of the pressurizing unit is changed, for example, by changing the diameter of the flow path itself or by inserting an orifice or the like. It becomes. Therefore, the effect of the sixth aspect of the invention can be reliably achieved with an extremely simple configuration.

  According to a ninth aspect of the present invention, the second pressurization unit has a first pressure unit whose accumulated pressure downstream of the second pressurization unit is such that the initial speed of water discharge is faster than that of the first pressurization unit. It is characterized by being configured to be smaller than the downstream pressure accumulation amount.

  According to this water discharge device, for example, by inserting a pressure accumulator or interposing a rubber hose, the speed of the wash water discharged is set by a very simple configuration in which the pressure accumulation amount downstream of the pressurization unit is changed. It can be changed. Therefore, the effect of the sixth aspect of the invention can be reliably achieved with an extremely simple configuration.

  A tenth aspect of the invention is characterized in that the water discharging means includes air mixing means for mixing air into the water.

  According to this water discharger, air can be mixed into the water by the air mixing means. Therefore, the water discharge cross-sectional area can be easily expanded by the air that is forcibly mixed in the water without expanding the water discharge area in a conical shape. As a result, it is possible to further increase the amount of water required to wash away the dirt, and it is possible to reliably wash the optimum range without over-expanding.

  According to the aspect of the present invention, it becomes possible to perform water discharge that combines the power of removing dirt with the extremely small amount of water used and the power of washing away dirt at a high level that has never been achieved, and with extremely high water-saving performance. It is possible to provide a water discharger that can provide extremely high cleaning performance.

It is a schematic block diagram for illustrating a water discharging apparatus. It is a schematic structure sectional view for illustrating a motor type reciprocating type pulsation generating part (water discharge means). It is a figure for demonstrating a pressure waveform. It is a schematic diagram for illustrating a nozzle. It is the figure which illustrated the mode of the stroke of a piston. It is a timing chart which showed the mode of change of the speed (initial speed) generated by the pulsation generating part. It is a schematic diagram for illustrating the process in which the discharged water is amplified by the pulsating flow. It is the timing chart which showed the change of the load when water discharge hits to-be-cleaned object. It is a schematic structure sectional view for illustrating a motor type reciprocating type pulsation generating part (water discharge means). It is the timing chart which showed the mode of the pressure fluctuation produced | generated by the pulsation generation | occurrence | production part (water discharging means). It is a timing chart for illustrating the state of change of speed (initial speed). It is a schematic structure sectional view for illustrating a motor type reciprocating type pulsation generating part (water discharge means). It is a timing chart for illustrating the situation of pressure fluctuation. It is the figure which illustrated the mode of the stroke of a piston. It is the timing chart which showed the mode of the change of the speed (initial speed) produced | generated by the pulsation generation | occurrence | production part (water discharging means). It is a schematic structure sectional view for illustrating a motor type reciprocating type pulsation generating part (water discharge means). It is the timing chart which showed the mode of the pressure fluctuation produced | generated by the pulsation generation | occurrence | production part (water discharging means). It is a timing chart for illustrating the state of change of speed (initial speed). It is a schematic structure sectional view for illustrating a motor type reciprocating type pulsation generating unit device (water discharge means). It is a schematic diagram for illustrating the case where the rotational speed of a motor is controlled. It is a schematic structure sectional view for illustrating a motor type reciprocating type pulsation generating part (water discharge means). It is a schematic diagram for illustrating a pressure waveform. It is a schematic structure sectional view of a pulsation generating part (water discharging means). It is a mimetic diagram for illustrating the situation of pressure fluctuation of washing water. It is a figure of the voltage waveform for illustrating the mode of excitation of a pulsation generating coil. It is a timing chart for illustrating the speed (initial speed) of washing water. It is a schematic diagram for illustrating the process in which the discharged wash water is amplified. It is a timing chart which showed a speed waveform and a tracking curve. It is a graph for demonstrating the mode of the pressure fluctuation of washing water. It is a schematic diagram for illustrating the timing of voltage application, the operation | movement of a plunger, a pressure waveform, and the state of discharged wash water. It is a schematic diagram for illustrating the voltage waveform applied to a pulsation generation | occurrence | production part (water discharge means). It is a timing chart for illustrating the speed (initial speed) change of the discharged water which arises by pressure fluctuation. It is a schematic diagram for illustrating the case where the pressure accumulation part is provided. It is a waterway system diagram for illustrating the water discharging apparatus provided with the air mixing part. It is a schematic block diagram for illustrating the structure which applied the water discharging apparatus to the shower apparatus.

Hereinafter, the first embodiment of the present invention will be illustrated with reference to the drawings. In addition, in each drawing in other embodiment, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
First, the water discharging apparatus which concerns on this Embodiment is illustrated.
FIG. 1 is a schematic configuration diagram for illustrating a water discharge device.

As shown in FIG. 1, the water channel system of the water discharge device 1 includes a water inlet side valve unit 50, a heat exchange unit 60, and a pulsation unit 70 that are supplied from a supply source (not shown) outside the casing of the water discharge device. Prepare. That is, the water channel system of the water discharger 1 is provided with a water inlet side valve unit 50, a heat exchange unit 60, and a pulsation unit 70 in order from the supply source (not shown) side outside the casing of the water discharger 1. ing.
Then, the washing water having the pulsation imparted by the pulsation generation unit 70 is guided from the pulsation generation unit 70 to the nozzle 82 via the flow rate adjustment / flow path switching valve 81 of the nozzle unit 80 and discharged from the nozzle 82. . Each of these units is accommodated in the casing of the water discharge device 1. Further, the control unit 10 includes an electromagnetic valve 53, an incoming water temperature sensor 62a, a heater 61, an outgoing water temperature sensor 62b, a float switch 63, a pulsation generator (water discharge means) 90, a flow rate adjusting / flow path switching valve 81, a nozzle 82, and A control button (not shown) is connected. When the water discharge device of the present invention is used as a sanitary washing device, the control button has a power to remove strong dirt, “hard hair washing”, “soft hair washing” (hereinafter referred to as “soft washing”), A cleaning button for selecting each cleaning mode of “bidet cleaning”, a water pressure changing button for changing the water flow of the cleaning water, a temperature adjusting button for selecting the temperature of the cleaning water, and a stop button for stopping the cleaning are included.

  Each of these units is connected by a water supply pipe with the pulsation generator 90 interposed therebetween. That is, the water inlet side valve unit 50 and the heat exchange unit 60 are connected by a water supply line 55, and a flow rate adjustment / flow path switching valve 81 is connected by a water supply line 75 downstream of the pulsation generator 90.

  The water supply pipe 55 is connected to the water inlet side valve unit 50 so as to directly supply cleaning water (for example, tap water) from a water supply source (for example, a water pipe). The washing water guided to the water supply pipe 55 is captured by the strainer 51 of the water inlet side valve unit 50 and flows into the check valve 52. When the pipe is opened by the electromagnetic valve 53, the washing water flows into the pressure regulating valve 54 and is heated to a predetermined pressure (for example, water supply pressure: 0.110 MPa) in the instantaneous heating system. It flows into the exchange unit 60. In this way, the flow rate of the cleaning water flowing in under pressure regulation is set to about 200 to 600 cc / min. In addition, the water supply pipe 55 can be branched from a washing water tank (not shown) for storing flush water for toilet flushing, and can be piped to the incoming water side valve unit 50.

  The heat exchange unit 60 downstream of the water inlet side valve unit 50 described above includes a heat exchange unit 62 in which a heater 61 is built. The heat exchange unit 60 detects the temperature of the wash water flowing into the heat exchange unit 62 and the temperature of the wash water flowing out of the heat exchange unit 62 with the incoming water temperature sensor 62a and the outgoing water temperature sensor 62b, and detects the detected temperature. Based on this, the heating operation of the heater 61 is controlled so as to heat the cleaning water at the set temperature of the cleaning water. That is, in the heat exchange unit 60, the heater 61 performs heating so that the temperature of the cleaning water becomes a predetermined set temperature. In this case, based on the detected temperature from the incoming water temperature sensor 62a and the detected temperature from the outgoing water temperature sensor 62b, the controller 10 performs the heating operation of the heater 61 so that the temperature of the cleaning water becomes a predetermined set temperature. Be controlled.

  The washing water heated in this way flows into a pulsation generating unit 90 described later and is added with pulsation, and then flows into the flow rate adjustment / flow path switching valve 81. The pulsation is a pressure fluctuation generated by the pulsation generator, and devices that cause the pressure fluctuation are called a pulsation generator. In addition, the pulsation generation | occurrence | production part as used in this specification can also be called the water discharge means which controls the physical quantity of the wash water discharged from a water discharge hole.

  The heat exchange unit 60 also has a float switch 63 that detects the water level in the heat exchange unit 62. The float switch 63 is configured to output a signal to that effect when the heater 61 reaches or exceeds a predetermined water level where the heater 61 is submerged. And since the control part 10 controls energization of the heater 61 in the condition which has input this signal, the situation where it energizes the heater 61 which is not submerged, so-called empty heating of the heater 61 is prevented. be able to. The heater 61 of the heat exchange unit 60 is optimally controlled by the controller 10 while combining feedforward control and feedback control.

Furthermore, the heat exchange unit 60 includes a vacuum breaker 64 and a safety valve 65 at the washing water outlet from the heat exchange unit 62, that is, at the heat exchange unit connection point of the pipe line downstream of the heat exchange unit 62. The vacuum breaker 64 introduces the atmosphere into the pipe line having a negative pressure, cuts off the washing water in the pipe line downstream of the heat exchange unit, and prevents the back flow of the washing water from the downstream side of the heat exchange unit. That is, the vacuum breaker 64 introduces the atmosphere into the pipe line that has become negative pressure, and discharges the cleaning water in the pipe line downstream of the heat exchange section from the nozzle 82. Therefore, it is possible to prevent the washing water from flowing backward from the downstream side of the heat exchanging section to the heat exchanging section 62 even when the inside of the pipe line has a negative pressure.
In addition, the safety valve 65 opens when the water pressure in the water supply pipe 67 exceeds a predetermined value, and discharges the washing water to the drainage pipe 66, thereby preventing problems such as breakage of equipment at the time of abnormality and disconnection of the hose. It is preventing.

Subsequently, the structure of the pulsation generator 90 will be illustrated.
FIG. 2 is a schematic cross-sectional view illustrating the pulsation generator 90 of the motor type reciprocating type.
The pulsation generation unit 90 has a two-unit configuration including a first pulsation generation unit 91 and a second pulsation generation unit 92. The first pulsation generator 91 and the second pulsation generator 92 are provided with cylinders 910a and 920a each having a cylindrical space. Pistons 910b and 920b are provided in the cylinders 910a and 920a. O-rings 910c and 920c are attached to the pistons 910b and 920b. Respective spaces defined by the pistons 910b and 920b and the cylinders 910a and 920b become pressurizing chambers 910d and 920d.

Into the pressurizing chambers 910d and 920d, the washing water inlets 910e and 920e are branched from the water supply pipe 67 so that the washing water flows. That is, the pressurizing chambers 910d and 920d are provided with cleaning water inlets 910e and 920e, respectively. Then, pipes (not shown) branched from the water supply pipe 67 are connected to the cleaning water inlets 910e and 920e so that the cleaning water can flow into the pressurizing chambers 910d and 920d from the water supply pipe 67.
At that time, the umbrella packing 910f, 920f prevents back flow. That is, the umbrella packings 910f and 920f are provided at the portions where the cleaning water inlets 910e and 920e open to the pressurizing chambers 910d and 920d, and the cleaning water flowing into the pressurizing chambers 910d and 920d does not flow backward to the water supply pipe 67 side. It is like that.
In addition, washing water outlets 910g and 920g are provided, and merged in the middle, and pressurized washing water flows out. That is, the washing water outlets 910g and 920g are provided at the ceiling portions of the pressurizing chambers 910d and 920d, respectively. Pipes are connected to the washing water outlets 910g and 920g, respectively, and each connected pipe is connected to the water supply pipe line 75 via a branch portion. Therefore, the wash water that has flowed out of the pressurizing chambers 910d and 920d joins in the middle, and flows out to the water supply line 75 as pressurized wash water.

  A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913 are engaged with each other. Also, a crankshaft 914 that operates the piston 910b of the first pulsation generator 91 and a crankshaft 924 that operates the piston 920b of the second pulsation generator 92 are attached to the gear 913 at different positions. Yes. The crankshafts 914 and 924 are attached to the pistons 910b and 920b via the piston holding portions 915 and 925. The position of the crankshaft attached to the gear 913 is different from each other so that the stroke amounts of the piston 910b and the piston 920b are different, and the crankshaft is attached to a position having a 90 ° phase difference. Further, the stroke of the piston 920b of the second pulsation generator 92 is set to be shorter than the stroke of the piston 910b of the first pulsation generator 91 and the phase is shifted by 90 °. As described above, since the operations of the pistons 910b and 920b are set in advance according to the mounting positions of the gear 913 and the crankshafts 914 and 924, the pulsation generating unit 90 can be easily controlled simply by turning on / off the motor energization switch. Can perform a predetermined operation.

When the user selects and pushes the cleaning button, the motor 911 is energized and the rotation shaft rotates, so that the pistons 910b and 920b are connected via the gears 912 and 913, the crankshafts 914 and 924, and the piston holding portions 915 and 925. Reciprocates up and down. When the pressurized chamber is filled with cleaning water, the volume of the pressurizing chamber is reduced when the piston 910b (920b) moves from the bottom dead center (original position) to the top dead center. Then, it is swept toward the water supply pipe 75.
Then, when returning from the top dead center to the bottom dead center (original position), the pressure in the pressurizing chamber decreases, the umbrella packings 910f and 920f open, and the cleaning water flows into the pressurizing chamber. After that, at the next piston movement, the washing water is pressurized again, and the pressure fluctuation, that is, the pulsation is generated by performing this process continuously.
FIG. 5 is a diagram illustrating the state of the stroke of the pistons 910b and 920b.
As shown in FIG. 5, the stroke of the piston 920b is set to be about half of the stroke of the piston 910b, and the phase is shifted by 90 °. Note that the period is the same.

  In this case, the pulsation generator 90 is supplied with cleaning water having a water supply pressure via the water supply pipe 55. Therefore, as described above, the cleaning water that has flowed into the pressure chambers 910d and 920d through the umbrella packings 910f and 920f during the return to the original position of the piston is caused by pressure loss due to the umbrella packings 910f and 920f and the downstream cleaning water. Although it does not remain at the feed water pressure due to the influence of the pull-in, it is sent to the feed water pipe 75. That is, the wash water that has flowed into the pressurizing chambers 910 d and 920 d through the umbrella packings 910 f and 920 f before the piston returns to the original position (bottom dead center) flows out toward the water supply pipe 75. In this case, the pressure of the cleaning water flowing out to the water supply pipe 75 is different from the water supply pressure due to the pressure loss caused by the umbrella packings 910f and 920f and the influence of the downstream cleaning water being drawn.

This is shown in the figure.
As shown in FIG. 3, the wash water is sent from the pulsation generator 90 to the water supply line 75 and eventually to the nozzle unit 80 at a pressure pulsated with reference to the introduction water pressure Pin (feed water pressure) to the pulsation generator 90, Water is discharged toward the item to be cleaned. In addition, the pressure waveform shown in FIG. 3 is measured in the water discharge hole 401 or the water discharge hole 402 which will be described later, or the cleaning vortex chamber 301 or 302 communicating with them. In addition, a pressure gauge with high responsiveness was used, and measurement was performed at a high sampling period. Moreover, MT in the figure indicates one pulsation cycle.
The pulsation generating unit 90 is a simple control that simply turns the motor on and off by a preset piston operation, and as shown in FIG. 3, in one pulsation cycle, at least one convex peak and front and rear Periodic pulsation transition is generated so as to have an inflection point with a positive slope. That is, the piston operation set in advance can be performed in the pulsation generating unit 90 by simple control that simply turns the motor on and off. As a result, as shown in FIG. 3, in one pulsation cycle MT, it is possible to generate a periodic pulsation transition having at least one convex peak and an inflection point at which the forward and backward inclination becomes positive.

Next, the accumulator 73 is illustrated. The accumulator 73 includes a housing 73a, a damper chamber 73b in the housing, and a damper 73c disposed in the damper chamber.
The accumulator 73 having such a configuration reduces water hammer applied to the water supply pipe 67 on the upstream side of the pulsation generator 90 by the action of the damper 73c. For this reason, the influence of the water hammer which has on the washing water temperature distribution of the heat exchange part 62 can be relieved, and the temperature of washing water can be stabilized. In this case, the accumulator 73 is disposed close to the pulsation generating unit 90 or integrally with the pulsation generating unit 90 so that the pulsation generated by the pulsation generating unit 90 can be quickly and effectively propagated upstream. It is preferable from the viewpoint that can be avoided. That is, it is preferable that the accumulator 73 is disposed close to the pulsation generating unit 90 or the accumulator 73 and the pulsation generating unit 90 are integrated. By doing so, it is possible to quickly and effectively suppress the pulsation generated in the pulsation generating unit 90 from propagating upstream.

  Next, the nozzle unit 80 will be illustrated. The nozzle unit 80 is provided with a flow rate adjusting / flow path switching valve 81, and is connected to the nozzle 82 through a water supply pipe 86. That is, the nozzle unit 80 is provided with a flow rate adjusting / flow path switching valve 81. In addition, a nozzle 82 is connected to the flow rate adjustment / flow path switching valve 81 via a water supply line 86. And the supply destination of the washing water of the pulsating flow sent from the pulsation generating unit 70 is switched to each flow path 83, 84, 85 (see FIG. 4) of the nozzle 82, and the flow path is adjusted. In other words, the flow rate adjusting / flow path switching valve 81 flows so that the washing water having pulsation sent from the pulsation generating unit 70 is supplied to each of the flow paths 83, 84, 85 provided in the nozzle 82. Switch the road. At that time, the flow rate is adjusted by adjusting the cross-sectional area of the flow path.

Next, the nozzle 82 will be illustrated. 4A and 4B show the structure of the nozzle. The plurality of cleaning channels 83, 84, and 85 in the nozzle 82 are a basal cleaning water discharge hole 401 that discharges cleaning water toward a “wet” (object to be cleaned) in the vicinity of the nozzle tip and a bidet cleaning unit. The water discharge hole 402 communicates. Washing water swirl chambers 301 and 302 are provided upstream of the water discharge holes 401 and 402 to discharge water from the water discharge holes as a swirling flow while swirling the cleaning water flowing through the cleaning flow paths 83 and 85.
That is, in the vicinity of the tip of the nozzle 82, there are provided a butt cleaning water discharge hole 401 for discharging cleaning water toward a “wet” (object to be cleaned) and a bidet cleaning water discharge hole 402. A washing water vortex chamber 301 is provided on the upstream side of the water discharge hole 401 so as to communicate therewith. A washing water vortex chamber 302 is provided on the upstream side of the water discharge hole 402 so as to communicate therewith.

The cleaning channel 83 is connected in the tangential direction of the cleaning water vortex chamber 302 having a cylindrical shape. The cleaning channel 85 is connected in a tangential direction of the cleaning water vortex chamber 301 having a cylindrical shape. The cleaning channel 84 is connected toward the axial center of the cleaning water vortex chamber 301. The wash water passed from the tangential direction swirls along the inner walls of the wash water vortex chambers 301 and 302, and the swirled wash water is discharged from the water discharge holes 401 and 402 as a swirl flow.
On the other hand, the cleaning channel 84 communicates with the upper part of the cleaning vortex chamber 301 and communicates with the water discharge hole 401. That is, the cleaning channel 83 is connected to the lower part of the cleaning water vortex chamber 302. Further, the cleaning channel 84 is connected to the upper portion of the cleaning vortex chamber 301, and the cleaning channel 85 is connected to the lower portion of the cleaning vortex chamber 301.

  Note that the cleaning water vortex chambers 301 and 302 are not necessarily provided.

Here, the state of water discharge of the washing water in this embodiment is illustrated.
FIG. 6 is a timing chart showing how the speed (initial speed) generated by the pulsation generator 90 changes. The change in speed (initial speed) in FIG. 6 is linked to the operation of the pistons 910b and 920b in FIG. When the piston 920b strokes to the top dead center at the timing of “S1” in FIG. 5, the cleaning water in the pressurizing unit 920d is pressurized, and the speed (initial speed) at the time when the cleaning water is discharged from the water discharge hole is The vehicle is accelerated to a speed V2 shown in FIG. At that time, the velocity waveform changes so as to have an inflection point where the forward and backward inclination becomes positive. Thereafter, at the timing when the piston 910b reaches the top dead center, the speed of the cleaning water reaches one convex peak speed V4. Then, the pistons 910b and 920b are lowered, and the washing water speed is also lowered to V1.

  Subsequently, the state of the washing water obtained by the velocity waveform produced as described above will be exemplified. First, the relationship between the pressure fluctuation and the speed change will be illustrated with reference to FIGS. 3 and 6. When a pulsation transition of pressure is generated by the pulsation generator 90, the speed (initial speed) V also varies in the same manner. When the pressure fluctuation becomes Pmax, the speed of the washing water discharged becomes the maximum speed Vmax, and the speed also varies corresponding to the pressure of each time. Therefore, if each part in the pressure waveform of the washing water of the pulsating flow in FIG. 3 is P1, P2, P3, P4, P5, the speeds of V1, V2, V3, V4, V5 in FIG. Correspond. That is, the wash water is discharged from the same water discharge hole toward the same part of the object to be cleaned while changing the speed (initial speed) at the time of water discharge from the water discharge hole to V1, V2, V3, V4, and V5. , And land on the same part of the object to be cleaned.

The state of the wash water produced by this speed change is illustrated. First, it is assumed that the wash water is discharged at a speed of V1 at the first time point. Thereafter, the washing water is discharged at a speed of V2 at a certain time interval. At this time, since the wash water discharged at the speed of V2 is faster than the wash water discharged at the speed of V1, the wash water discharged at the speed of V2 and the wash water discharged at the speed of V1. The distance of the wash water is reduced. That is, since the speed V2 of the cleaning water is faster than the speed V1, the distance between the cleaning water discharged at the speed V1 and the cleaning water discharged at the speed V2 is reduced.
Then, the water discharged at the speed of V2 catches up with the water discharged at the speed of V1 until the respective water reaches the object to be cleaned, so that the water is discharged at the speed of V1. The wash water between the wash water and the wash water discharged at the speed of V2 is integrated to form a water discharge group having a large water discharge cross-sectional area (hereinafter simply referred to as a “large water discharge group”). That is, when a speed rising gradient occurs in the speed waveform, a water discharge group is formed. Therefore, this relationship also holds between the wash water discharged at the speed of V3 and the wash water discharged at the speed of V4. At this time, the speed V3 and the speed V4 are faster than the speed V1 and the speed V2. As described above, when the speed is high, the time from when water is discharged until the object is washed is shortened. Therefore, the distance that the cleaning water discharged at the speed of V4 can follow up until the cleaning water discharged at the speed of V3 reaches the object to be cleaned becomes small and integrated. The water discharge group is not formed much. Therefore, the cleaning water discharged at each speed continuously reaches the object to be cleaned. Further, if the inflection point having a positive and backward slope appears while the convex peak speed V4 appears from the speed V1, the water discharge group generated from the speed V1 to the speed V2 and the speed V3 The water discharge group generated at the speed V4 can land on the object to be cleaned independently without being integrated.

Then, the change of the state of the discharged washing water is illustrated using a figure.
FIG. 7 is a schematic diagram for illustrating a process in which when the pulsating flow of washing water is discharged from the assumed water discharge hole 40, the discharged washing water is amplified by the pulsating flow.
As described above, in the rising slope portion of the velocity waveform, the wash water discharged at a high speed is sequentially combined with the wash water discharged at a low speed before that, resulting in a large water discharge group. Water will land on the object to be cleaned (cleaning surface).

  First, as shown in FIG. 7A, when the cleaning water is discharged at a speed of V1, and then the cleaning water is discharged at a speed of V2, the cleaning water discharged at the speed of V2 is It catches up with the wash water discharged earlier at a slow speed, and proceeds toward the object to be cleaned while forming a large water discharge group.

  Then, as shown in FIG. 7B, when the washing water discharged at the speed of V2 lands on the object to be cleaned, the washing water discharged at the speed of V1 is also followed and integrated. Become a big water discharge group. That is, since the speed V2 is faster than the speed V1, the wash water discharged at the speed V1 is combined with the wash water discharged at the speed V2 and the wash water between them to form a large water discharge group.

  Since the water discharge group formed in this way has a large volume, the area that hits the object to be cleaned becomes large. Can be washed away.

  On the other hand, as shown in (C) and (D) of FIG. 7, the overall speed is high in the rising slope portion of the speed on the area side including the speed V3 and the speed V4, that is, on the area side where the speed is high. . Therefore, in the short time until the object is washed, the distance between the washing water discharged at the speed of V3 and the washing water discharged at the speed of V4 is not easily reduced. As a result, the cleaning water discharged at a speed of V4 is discharged at a speed of V3 at the time when the cleaning water is discharged linearly without being expanded into a conical shape and landed on the object to be cleaned. In this case, the washing water having the respective speeds will continuously land on the object to be washed as a water discharge group having a small water discharge cross-sectional area (hereinafter simply referred to as “small water discharge group”). . Therefore, the cleaning water in this case has a small area and mass when it hits the object to be cleaned, but the speed is high, and as a result, the collision energy (force for removing dirt) is large.

Here, since the wash water discharged at a high speed does not catch up with the wash water discharged at a low speed, the wash water discharged at a high speed reaches the object to be cleaned without being decelerated. . For this reason, the force for removing the dirt is large, and the dirt can be surely removed.
At this time, the water discharge generated from the speed V1 to the speed V2 is controlled so that an inflection point having a positive and backward slope appears between the speed V1 and the convex peak speed V4. A time interval can be generated between the timing at which the group reaches the object to be cleaned and the timing at which the water discharge group generated from the speed V3 to the speed V4 reaches the object to be cleaned. As a result, the objects to be cleaned can be made to land independently without integrating them.

  That is, when a slow and large water discharge group generated by discharging water at the speed V2 lands on the object to be cleaned, the water discharge group grows large, so that the cleaning water reaches a large area. . Therefore, it is possible to give the power to wash away dirt as if it were washed with a large amount of water.

  On the other hand, when the fast and small water discharge group generated by discharging water at the speed V4 lands on the object to be cleaned, the area does not become very large, but the fast speed part is almost the same as the previously slow speed. Without catching up, the water will land while maintaining a high speed. Therefore, the force which removes dirt can be given at high speed.

In addition, since the slow and large water discharge group and the fast and small water discharge group independently land on the object to be cleaned at different speeds without interfering with each other, for example, if the object to be cleaned is a human body, You can experience the power to wash away and the power to remove dirt continuously.
In addition, since the time interval when each water discharge group lands on the object to be cleaned is sufficiently short, for example, when the object to be cleaned is a human body, it is assumed that each water discharge group has landed almost simultaneously. Can do. Therefore, it can be made to feel that the cleaning power is compatible with the power to remove dirt and the power to wash away dirt.

Here, FIG. 8 is a timing chart showing a change in load when the water discharged in this embodiment hits the object to be cleaned.
As shown in FIG. 8, two “mountains” are generated in one cycle (pulsation cycle MT). The “mountain” indicates that the load value has increased due to the wash water discharged later. In addition, two “mountains” indicate that two independent water discharge groups were generated in one cycle, that is, a slow and large water discharge group and a fast and small water discharge group were generated independently. Show. In this case, it is possible to give a force to wash away dirt with a slow and large water discharge group, and to give a force to remove dirt with a fast and small water discharge group that comes out later.

  Regarding the change in the load, the value obtained by integrating the respective “mountains” is M · V, that is, the impact force. By sufficiently increasing the impact force value, the “detergent cleaning force” can be obtained. In addition, hitting an object to be cleaned with a certain impact force indicates that the wash water discharged later catches up and has a large impact force. That is, even if it does not appear to be “lumps (polka dots)”, it is sufficient that the water discharge group is sufficient in terms of impact force.

  The interval between two independent water discharge groups is about half of the pulsation cycle MT. Therefore, a more continuous feeling and high cleaning performance can be obtained. Moreover, each water discharge group will be in the state connected with the wash water discharged at the speed V5 and the speed V1 discharged late at the wash water discharged at the speed V4, respectively.

  Next, it will be described that the water discharge group generated with V2 as the base point is larger than the water discharge group generated with V4 as the base point. That is, the water discharge group generated in the low speed area (the area including the speed V1 and the speed V2) is larger than the water discharge group generated in the high speed area (the area including the speed V3 and the speed V4). Will be explained.

Here, a process in which the water discharge group is generated will be described.
The water discharge group is generated when the wash water discharged from the water discharge hole 40 and hits the object to be cleaned catches up with the wash water discharged earlier at a high speed and catches up with the wash water discharged earlier at a low speed. Is done.

  At this time, when a water discharge group is to be generated in a region where the speed is high (a region including the speed (initial speed) V3 and the speed V4), the cleaning water discharged from the water discharge holes until the water reaches the object to be cleaned. Time is shortened. For example, when the speed is 15 m / sec, the time to reach the object to be cleaned 60 mm ahead is 4 msec (milliseconds).

  On the other hand, when it is going to produce | generate a water discharge group in the area | region (speed (initial speed) V1 and area | region containing the speed V2) where speed is slow, time until the wash water discharged from the water discharge hole arrives at a to-be-washed object. Is longer than in the high-speed region. For example, when the speed is 7.5 m / sec, the time required to reach the object to be cleaned 60 mm ahead is 8 msec.

  At this time, if there is a speed difference of the same amount, the amount of catching up is larger as the time to reach the object to be cleaned is longer. That is, in a region where the speed is low and in a region where the speed is high, if there is a portion where the speed difference between the cleaning water discharged earlier and the cleaning water discharged later is the same, until the object to be cleaned is reached The longer it takes, the more you can catch up. For this reason, the amount of follow-up in a region where the speed until reaching the object to be cleaned is longer and the speed is slower increases, and thus a larger water discharge group is generated.

  Since the water discharge group generated in this manner is a larger water discharge group, the cross-sectional area of the water discharge group is larger than usual. Therefore, even though the amount of water used is small, water discharge having a large cross-sectional area can be applied, so that it is possible to obtain the cleaning performance as if cleaning is performed at a large flow rate, that is, the ability to wash away dirt.

  On the other hand, in the region where the speed is high, the wash water discharged later at the high speed V4 is difficult to catch up with the wash water discharged earlier, so that the object to be cleaned reaches the washing object before the water discharge group becomes large. . Therefore, the cross-sectional area is small, and the power to wash away dirt is poor. However, the fact that it cannot catch up with the water that has been sprinkled earlier means that it can land on the object to be washed without absorbing the energy of the water that has been sprinkled earlier, so the high speed was maintained. Can land on the water as it is. At this time, the impact force related to the force for removing dirt (the force for removing dirt) becomes large because the speed increases.

Therefore, by providing the power to wash away dirt with a slow and large water discharge group, and the ability to remove dirt with a fast and small water discharge group, it realizes highly comfortable washing that combines the power to wash dirt and the power to remove dirt. be able to.
Moreover, the slow and large water discharge group and the fast and small water discharge group each have sufficient impact force. In addition, as described above, the water can be landed at a half cycle with respect to the pulsation cycle MT. In this case, since the time interval for each water discharge group to land on the object to be cleaned is sufficiently short, it is possible to feel that each water discharge group has landed almost simultaneously. Therefore, it can be made to experience as a continuous cleaning having the power to remove dirt and the power to wash away dirt.

Subsequently, the second embodiment will be illustrated.
FIG. 9 is a schematic cross-sectional view for illustrating a motor type reciprocating type pulsation generating portion (water discharge means) 90a.
The pulsation generation unit 90a has a double configuration including a first pulsation generation unit 91a and a second pulsation generation unit 92a. The first pulsation generator 91a and the second pulsation generator 92a are provided with cylinders 910a and 920a each having a cylindrical space. Pistons 910b and 920b are provided in the cylinders 910a and 920a. O-rings 910c and 920c are attached to the pistons 910b and 920b. Respective spaces defined by the pistons 910b and 920b and the cylinders 910a and 920a become pressure chambers 910d and 920d.

Into the pressurizing chambers 910d and 920d, the washing water inlets 910e and 920e are branched from the water supply pipe 67 so that the washing water flows. That is, the pressurizing chambers 910d and 920d are provided with cleaning water inlets 910e and 920e, respectively. Then, pipes (not shown) branched from the water supply pipe 67 are connected to the cleaning water inlets 910e and 920e so that the cleaning water can flow into the pressurizing chambers 910d and 920d from the water supply pipe 67.
At that time, the umbrella packing 910f, 920f prevents back flow. That is, the umbrella packings 910f and 920f are provided at the portions where the cleaning water inlets 910e and 920e open to the pressurizing chambers 910d and 920d, and the cleaning water flowing into the pressurizing chambers 910d and 920d does not flow backward to the water supply pipe 67 side. It is like that. In addition, washing water outlets 910g and 920g are provided, and merged in the middle, and pressurized washing water flows out. That is, the washing water outlets 910g and 920g are provided at the ceiling portions of the pressurizing chambers 910d and 920d, respectively. Pipes are connected to the washing water outlets 910g and 920g, respectively, and each connected pipe is connected to the water supply pipe line 75 via a branch portion. Therefore, the wash water that has flowed out of the pressurizing chambers 910d and 920d joins in the middle, and flows out to the water supply line 75 as pressurized wash water.

  At that time, the umbrella packing 910h, 920h also prevents backflow. That is, umbrella packings 910h and 920h are provided at the washing water outlets 910g and 920g so that the washing water flowing out to the water supply pipe 75 side does not flow back to the pressurizing chambers 910d and 920d.

  A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913 are engaged with each other. Also, a crankshaft 914 that operates the piston 910b of the first pulsation generator 91a and a crankshaft 924 that operates the piston 920b of the second pulsation generator 92a are attached to the gear 913 at different positions. Yes. The crankshafts 914 and 924 are attached to the pistons 910b and 920b via the piston holding portions 915 and 925. The position of the crankshaft attached to the gear 913 is different from each other so that the stroke amounts of the piston 910b and the piston 920b are different, and the crankshaft is attached to a position having a 90 ° phase difference. The stroke of the piston 920b of the second pulsation generator 92a is set to be shorter than the stroke of the piston 910b of the first pulsation generator 91 and the phase is shifted by 90 °. As described above, since the operations of the pistons 910b and 920b are set in advance according to the mounting positions of the gear 913 and the crankshafts 914 and 924, the pulsation generator 90a can be controlled by simply turning on / off the power switch of the motor. Can perform a predetermined operation.

  When the user selects and pushes the cleaning button, the motor 911 is energized and the rotating shaft rotates. Therefore, the pistons 910b and 920b are moved up and down via the gears 912 and 913, the crankshaft 914, and the piston holding portions 915 and 925. Reciprocates. Also in the present embodiment, the pressure is changed by changing the volume of the pressurizing chamber, similar to the example illustrated in FIG. That is, pulsation is generated. At this time, the strokes and phases of the pistons 910b and 920b are as shown in FIG. In other words, the stroke of the piston 920b is set to be approximately half of the stroke of the piston 910b, and is 90 ° out of phase. Note that the period is the same.

Next, how the pressure generated by the pulsation generator 90a varies will be described with reference to FIG.
FIG. 10 is a timing chart showing the state of pressure fluctuation generated by the pulsation generator 90a.
10, when the piston 920b strokes to the top dead center at the timing of “S1” in FIG. 5, the cleaning water in the pressurizing unit 920d is pressurized, and the pressure of the cleaning water is increased to the pressure Pm1 shown in FIG. Pressed. Thereafter, at the same time when the piston 920b is lowered and the piston 910b of the pulsation generating portion 91a is raised and reaches the top dead center, the pressure reaches the convex peak pressure Pm3. Then, the piston 910b is lowered and the pressure is also lowered to Pm4.

  Also in the present embodiment, by controlling the operation of the piston, an inflection point where the front and rear have a positive inclination appears from the pressure Pm4 until the convex peak pressure Pm3 appears. As a result, the water discharge group generated from the pressure Pm4 to the pressure Pm1 and the water discharge group generated from the pressure Pm2 to the pressure Pm3 can independently land on the object to be cleaned without being integrated. Therefore, in the present embodiment as well, as described above, it is possible to achieve high cleaning performance that has both the power to wash away dirt and the power to remove dirt.

By causing such a pressure fluctuation, the speed of the cleaning water discharged from the water discharge hole 40 can be similarly changed. In this case, each part Pm1, Pm2, Pm3, Pm4 in the pressure waveform of FIG. 10 and each part Vm1, Vm2, Vm3, Vm4 in the velocity waveform of FIG.
Therefore, speed variation can be caused also in the present embodiment. Therefore, the wash water discharged at the speed Vm1 can form the first water discharge group (large water discharge group) while catching up with the wash water discharged earlier than that. Further, the wash water discharged at the speed Vm3 forms a second water discharge group (small water discharge group) while catching up with the wash water discharged earlier than that. At that time, there is a sufficient time interval between the timing at which the speed Vm1 is formed and the timing at which the speed Vm3 is formed. Therefore, when the second water discharge group is generated, since the first water discharge group is at a sufficiently advanced position, each of the water discharges can be made independently when landing on the object to be cleaned. Therefore, since the water discharge group from which speed differs can be made to land continuously, a different detergency can be given to each water discharge group.

  Further, in this case, umbrella packings 910h and 920h are provided at the washing water outlet of the pressurizing chamber to prevent the backflow of the washing water from the downstream side. Therefore, as shown in FIG. 10, it is possible to generate a pressure fluctuation that is higher than the feed water pressure Pin, that is, such that the minimum value of the pressure fluctuation is higher than the feed water pressure Pin. Thereby, even in an area where the water pressure of the water supply source is low, high cleaning performance can be realized.

  In this case, the number of cylinders may be one, two pressure chambers may be provided in the axial direction of the cylinder, and the strokes may be set differently. Moreover, you may provide a cylinder facing. Further, by providing three or more cylinders and giving a phase difference to each of them, a speed fluctuation that has one convex peak and two inflection points where the front and rear inclinations are positive may be generated. In this case, you may make it produce the speed fluctuation | variation which has one convex point with two convex peaks, and the front-back inclination. Thereby, water discharge having three cleaning powers can be generated, and various cleaning performances can be realized. Further, a motor may be provided for each of the plurality of cylinders.

Subsequently, the third embodiment will be illustrated.
FIG. 12 is a schematic cross-sectional view for illustrating a motor type reciprocating type pulsation generating portion (water discharge means) 90b.
The pulsation generation unit 90b has a double configuration including a first pulsation generation unit 91b and a second pulsation generation unit 92b. The first pulsation generator 91b and the second pulsation generator 92b are provided with cylinders 910a and 920a each having a cylindrical space. Pistons 910b and 920b are provided in the cylinders 910a and 920a. O-rings 910c and 920c are attached to the pistons 910b and 920b. Respective spaces defined by the pistons 910b and 920b and the cylinders 910a and 920a become pressure chambers 910d and 920d.

Into the pressurizing chambers 910d and 920d, the washing water inlets 910e and 920e are branched from the water supply pipe 67 so that the washing water flows. That is, the pressurizing chambers 910d and 920d are provided with cleaning water inlets 910e and 920e, respectively. Then, pipes (not shown) branched from the water supply pipe 67 are connected to the cleaning water inlets 910e and 920e so that the cleaning water can flow into the pressurizing chambers 910d and 920d from the water supply pipe 67.
At that time, the umbrella packing 910f, 920f prevents back flow. That is, the umbrella packings 910f and 920f are provided at the portions where the cleaning water inlets 910e and 920e open to the pressurizing chambers 910d and 920d, and the cleaning water flowing into the pressurizing chambers 910d and 920d does not flow backward to the water supply pipe 67 side. It is like that.

  In addition, washing water outlets 910g and 920g are provided, and merged in the middle, and pressurized washing water flows out. That is, the washing water outlets 910g and 920g are provided at the ceiling portions of the pressurizing chambers 910d and 920d, respectively. Pipes are connected to the washing water outlets 910g and 920g, respectively, and each connected pipe is connected to the water supply pipe line 75 via a branch portion. Therefore, the wash water that has flowed out of the pressurizing chambers 910d and 920d joins in the middle, and flows out to the water supply line 75 as pressurized wash water. A pressure loss portion set to an appropriate value is provided between the washing water outlets 910g and 920g and the pipe so that the pressure of the washing water pressurized by the pistons 910b and 920b is reduced quickly after the peak. ing.

  A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913 are engaged with each other. Also, a crankshaft 914 that operates the piston 910b of the first pulsation generator 91b and a crankshaft 924 that operates the piston 920b of the second pulsation generator 92b are attached to the gear 913 at different positions. Yes. The crankshafts 914 and 924 are attached to the pistons 910b and 920b via the piston holding portions 915 and 925. The position of the crankshaft attached to the gear 913 is different from that of the piston 910b and the piston 920b so that the mounting radii are different and the positions of the 180 ° phases are different. Further, the stroke of the piston 920b of the second pulsation generator 92b is set to be shorter than the stroke of the piston 910b of the first pulsation generator 91 and the phase is shifted by 180 °. As described above, since the operations of the pistons 910b and 920b are set in advance depending on the mounting positions of the gear 913 and the crankshafts 914 and 924, the pulsation generator 90b is simply controlled simply by turning on / off the motor energization switch. Can perform a predetermined operation.

  When the user selects and pushes the cleaning button, the motor 911 is energized and the rotation shaft rotates, so that the pistons 910b and 920b are connected via the gears 912 and 913, the crankshafts 914 and 924, and the piston holding portions 915 and 925. Reciprocates up and down. When the pressurized chamber is filled with cleaning water, the volume of the pressurizing chamber is reduced when the piston 910b (920b) moves from the bottom dead center (original position) to the top dead center. Then, it is swept toward the water supply pipe 75.

Then, when returning from the top dead center to the bottom dead center (original position), the pressure in the pressurizing chamber decreases, the umbrella packings 910f and 920f open, and the cleaning water flows into the pressurizing chamber. After that, at the next piston movement, the washing water is pressurized again, and the pressure fluctuation, that is, the pulsation is generated by performing this process continuously.
FIG. 14 is a diagram illustrating the state of the strokes of the pistons 910b and 920b.
As shown in FIG. 14, the stroke of the piston 920b is set to be approximately half of the stroke of the piston 910b, and the phase is shifted by 180 °. Note that the period is the same.

  In this case, the pulsation generator 90b is supplied with cleaning water having a water supply pressure via the water supply pipe 55. Therefore, as described above, the cleaning water that has flowed into the pressure chambers 910d and 920d through the umbrella packings 910f and 920f during the return to the original position of the piston is caused by the pressure loss caused by the umbrella packings 910f and 920f and the downstream cleaning water. Although it does not remain at the feed water pressure due to the influence of the pull-in, it is sent to the feed water pipe 75. That is, the wash water that has flowed into the pressurizing chambers 910 d and 920 d through the umbrella packings 910 f and 920 f before the piston returns to the original position (bottom dead center) flows out toward the water supply pipe 75. In this case, the pressure of the cleaning water flowing out to the water supply pipe 75 is different from the water supply pressure due to the pressure loss caused by the umbrella packings 910f and 920f and the influence of the downstream cleaning water being drawn.

This is shown in the figure.
As shown in FIG. 13, the wash water is sent from the pulsation generator 90 to the water supply line 75 and eventually to the nozzle unit 80 at a pressure pulsated with reference to the introduction water pressure Pin (feed water pressure) to the pulsation generator 90, Water is discharged toward the item to be cleaned. Note that the pressure waveform shown in FIG. 13 is measured in the water discharge hole 401 or the water discharge hole 402 described above or the cleaning vortex chamber 301 or 302 communicating therewith. In addition, a pressure gauge with high responsiveness was used, and measurement was performed at a high sampling period. Moreover, MT in the figure indicates one pulsation cycle.
The pulsation generation unit 90b is a simple control that simply turns the motor on and off by a preset piston operation. As shown in FIG. 13, a plurality of convex peaks are generated at different pressures in one pulsation cycle. Periodic pulsation transition is generated as shown.

  That is, it is possible to cause the pulsation generator 90b to perform a piston operation set in advance by simple control that simply turns the motor on and off. As a result, as shown in FIG. 13, it is possible to generate a periodic pulsation transition that generates a plurality of convex peaks having different pressure values in one pulsation cycle MT.

Here, the state of the discharge of the washing water in the present embodiment is illustrated.
FIG. 15 is a timing chart showing how the speed (initial speed) generated by the pulsation generator 90b changes. The change in speed in FIG. 15 is interlocked with the operation of the pistons 910b and 920b in FIG. When the piston 920b strokes to the top dead center at the timing of “S11” in FIG. 14, the cleaning water in the pressurizing unit 920d is pressurized, and the speed of the cleaning water is accelerated to a speed V12 shown in FIG. At that time, a first peak velocity V12 is formed. Thereafter, when the piston 920b is lowered, the speed is also lowered, and at the timing of “S12”, the speed is once lowered. That is, the speed decreases between the speed V12 and the speed V13.
Further, after that, at the timing when the piston 910b reaches the top dead center, the speed of the washing water reaches the second peak speed V14. Then, the pistons 910b and 920b are lowered, and the washing water speed is also lowered to V11.

  Subsequently, the state of the washing water obtained by the velocity waveform produced as described above will be exemplified. First, the relationship between the pressure fluctuation and the speed change will be illustrated with reference to FIGS. 13 and 15. When the pulsation transition of the pressure is generated by the pulsation generator 90b, the speed V similarly varies. When the pressure fluctuation becomes Pmax, the speed of the washing water discharged becomes the maximum speed Vmax, and the speed also varies corresponding to the pressure of each time. Therefore, if each part in the pressure waveform of the washing water of the pulsating flow in FIG. 13 is P11, P12, P13, P14, P15, the speeds of V11, V12, V13, V14, V15 in FIG. Correspond.

Then, the state of the wash water produced by this speed change is illustrated. First, it is assumed that the wash water is discharged at the speed of V11 at the first time point. Thereafter, the washing water is discharged at a speed of V12 at a certain time interval. At this time, since the wash water discharged at the speed of V12 is faster than the wash water discharged at the speed of V11, the wash water discharged at the speed of V12 and the water discharged at the speed of V11 are discharged. The distance of the wash water is reduced. That is, since the cleaning water speed V12 is faster than the speed V11, the distance between the cleaning water discharged at the speed V11 and the cleaning water discharged at the speed V12 is reduced.
Then, the water discharged at the speed of V12 catches up with the water discharged at the speed of V11 until each washing water reaches the object to be cleaned, so that the water is discharged at the speed of V11. The wash water between the wash water and the wash water discharged at the speed of V12 is integrated to generate a large water discharge group. That is, when a speed rising gradient occurs in the speed waveform, a water discharge group is generated. Therefore, this relationship also holds between the cleaning water discharged at the speed of V13 and the cleaning water discharged at the speed of V14. At this time, the speed V13 and the speed V14 are faster than the speed V11 and the speed V12. As described above, when the speed is high, the time from when water is discharged until the object is washed is shortened. Therefore, the distance that the cleaning water discharged at the speed of V14 can follow up until the cleaning water discharged at the speed of V13 reaches the object to be cleaned is small and integrated. The water discharge group is not generated much. Therefore, the cleaning water discharged at each speed continuously reaches the object to be cleaned.

Subsequently, the fourth embodiment will be illustrated.
FIG. 16 is a schematic cross-sectional view for illustrating a motor type reciprocating type pulsation generating portion (water discharge means) 90c.
The pulsation generation unit 90c has a double configuration including a first pulsation generation unit 91c and a second pulsation generation unit 92c. The first pulsation generator 91c and the second pulsation generator 92c are provided with cylinders 910a and 920a each having a cylindrical space. Pistons 910b and 920b are provided in the cylinders 910a and 920a. O-rings 910c and 920c are attached to the pistons 910b and 920b. Respective spaces defined by the pistons 910b and 920b and the cylinders 910a and 920a become pressure chambers 910d and 920d.

Into the pressurizing chambers 910d and 920d, the washing water inlets 910e and 920e are branched from the water supply pipe 67 so that the washing water flows. That is, the pressurizing chambers 910d and 920d are provided with cleaning water inlets 910e and 920e, respectively. Then, pipes (not shown) branched from the water supply pipe 67 are connected to the cleaning water inlets 910e and 920e so that the cleaning water can flow into the pressurizing chambers 910d and 920d from the water supply pipe 67.
At that time, the umbrella packing 910f, 920f prevents back flow. That is, the umbrella packings 910f and 920f are provided at the portions where the cleaning water inlets 910e and 920e open to the pressurizing chambers 910d and 920d, and the cleaning water flowing into the pressurizing chambers 910d and 920d does not flow backward to the water supply pipe 67 side. It is like that.

  In addition, washing water outlets 910g and 920g are provided, and merged in the middle, and pressurized washing water flows out. That is, the washing water outlets 910g and 920g are provided at the ceiling portions of the pressurizing chambers 910d and 920d, respectively. Pipes are connected to the washing water outlets 910g and 920g, respectively, and each connected pipe is connected to the water supply pipe line 75 via a branch portion. Therefore, the wash water that has flowed out of the pressurizing chambers 910d and 920d joins in the middle, and flows out to the water supply line 75 as pressurized wash water.

  At that time, the umbrella packing 910h, 920h also prevents backflow. That is, umbrella packings 910h and 920h are provided at the washing water outlets 910g and 920g so that the washing water flowing out to the water supply pipe 75 side does not flow back to the pressurizing chambers 910d and 920d.

  A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913 are engaged with each other. In addition, a crankshaft 914 that operates the piston 910b of the first pulsation generator 91c and a crankshaft 924 that operates the piston 920b of the second pulsation generator 92c are attached to the gear 913 at different positions. Yes. The crankshafts 914 and 924 are attached to the pistons 910b and 920b via the piston holding portions 915 and 925. The position of the crankshaft attached to the gear 913 is different from that of the piston 910b and the piston 920b so that the mounting radii are different and the positions of the 180 ° phases are different. Further, the stroke of the piston 920b of the second pulsation generator 92c is set to be shorter than the stroke of the piston 910b of the first pulsation generator 91 and the phase is shifted by 180 °. As described above, since the operations of the pistons 910b and 920b are set in advance depending on the mounting positions of the gear 913 and the crankshafts 914 and 924, the pulsation generator 90c can be controlled by simply turning on / off the motor energization switch. Can perform a predetermined operation.

  When the user selects and pushes the cleaning button, the motor 911 is energized and the rotating shaft rotates. Therefore, the pistons 910b and 920b are moved up and down via the gears 912 and 913, the crankshaft 914, and the piston holding portions 915 and 925. Reciprocates. Also in the present embodiment, the pressure fluctuation, that is, the pulsation is generated by changing the volume of the pressurizing chamber in the same manner as illustrated in FIG. At this time, the strokes and phases of the pistons 910b and 920b are as shown in FIG. In other words, the stroke of the piston 920b is set to be approximately half of the stroke of the piston 910b and the phase is shifted by 180 °. Note that the period is the same.

Next, how the pressure generated by the pulsation generator 90c varies will be described with reference to FIG.
FIG. 17 is a timing chart showing the state of pressure fluctuation generated by the pulsation generator 90c.
17, when the piston 920b strokes to the top dead center at the timing of “S11” in FIG. 14, the wash water in the pressurizing unit 920d is pressurized, and the pressure of the wash water is accelerated to the pressure Pm11 shown in FIG. Is done. Thereafter, when the piston 920b is lowered, the pressure is also lowered, and at the timing of “S12”, the pressure is lowered to Pm12. After that, the pressure reaches the second peak pressure Pm13 at the timing when the piston 910b of the first pulsation generating portion 91c reaches the top dead center. Then, the piston 910b is lowered and the pressure is also reduced to Pm14.

By causing such a pressure fluctuation, the speed of the cleaning water discharged from the water discharge hole 40 can be similarly changed. In this case, each part Pm11, Pm12, Pm13, Pm14 in the pressure waveform of FIG. 17 and each part Vm11, Vm12, Vm13, Vm14 in the velocity waveform of FIG.
Therefore, speed variation can be caused also in the present embodiment. Therefore, the wash water discharged at the speed Vm11 can generate the first water discharge group (large water discharge group) while catching up with the wash water discharged earlier than that. Further, the wash water discharged at the speed Vm13 catches up with the wash water discharged earlier than that, and generates a second water discharge group (small water discharge group). At this time, there is a sufficient time interval between the timing at which the speed Vm11 is formed and the timing at which the speed Vm13 is formed. Therefore, when the second water discharge group is generated, since the first water discharge group is at a sufficiently advanced position, each of the water discharges can be made independently when landing on the object to be cleaned. Therefore, since the water discharge group from which speed differs can be made to land continuously, a different detergency can be given to each water discharge group.

  Further, in this case, umbrella packings 910h and 920h are provided at the washing water outlet of the pressurizing chamber to prevent the backflow of the washing water from the downstream side. Therefore, as shown in FIG. 17, it is possible to cause a pressure fluctuation in which the pressure region is higher than the feed water pressure Pin, that is, the pressure fluctuation minimum value is higher than the feed water pressure Pin. Thereby, even in an area where the water pressure of the water supply source is low, high cleaning performance can be realized.

  In this case, the number of cylinders may be one, two pressure chambers may be provided in the axial direction of the cylinder, and the strokes may be set differently. Moreover, you may provide a cylinder facing. Alternatively, three or more cylinders may be provided, and a phase fluctuation may be provided to generate a speed fluctuation having three or more peak speeds. As a result, water discharge having three cleaning powers can be generated, and various cleaning performances can be realized. Further, a motor may be provided for each of the plurality of cylinders.

Subsequently, the fifth embodiment will be exemplified.
FIG. 19 is a schematic cross-sectional view for illustrating a motor type reciprocating type pulsation generator (water discharger) 90d.
The pulsation generator 90d is provided with a cylinder 910 having a cylindrical space. A piston 910b is provided in the cylinder 910. An O-ring 910c is attached to the piston 910b. A space defined by the piston 910b and the cylinder 910 becomes a pressurizing chamber 910d. Wash water flows into the pressurizing chamber 910 d from the wash water inlet 910 e water supply pipe 67. That is, a washing water inlet 910e is provided in the pressurizing chamber 910d. Then, the water supply pipe 67 is connected to the cleaning water inlet 910e so that the cleaning water can flow into the pressurizing chamber 910d from the water supply pipe 67.
At that time, the umbrella packing 910f prevents backflow. That is, an umbrella packing 910f is provided at a portion where the cleaning water inlet 910e opens into the pressurizing chamber 910d, so that the cleaning water flowing into the pressurizing chamber 910d does not flow backward to the water supply pipe 67 side.

  Further, a washing water outlet 910g is provided, and pressurized washing water flows out. At this time, the backflow is also prevented by the umbrella packing 910h. That is, the pressurizing chamber 910d is provided with a washing water outlet 910g. A water supply pipe 75 is connected to the washing water outlet 910g. Therefore, the wash water that has flowed out of the pressurizing chamber 910d flows into the water supply pipe 75 as pressurized wash water. At that time, the umbrella water 910h provided at the washing water outlet 910g prevents the washing water flowing out to the water supply line 75 side from flowing back into the pressurizing chamber 910d.

  A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913 are engaged with each other. A crankshaft 914 is attached to the gear 913, and a piston 910b is attached via a piston holding portion 915.

  When the rotation shaft of the motor 911 rotates based on the control signal given by the control unit 10, the piston 910 b reciprocates via the gears 912 and 913, the crankshaft 914, and the piston holding unit 915. Also in the present embodiment, pressure fluctuation, that is, pulsation is generated by changing the volume of the pressurizing chamber 910d.

At this time, the rotation speed of the motor 911 is controlled by the control unit 10. The rotation speed of the motor 911 is slowest (low pressure is low) from the top dead center where the speed is fastest (pressure is high). The control at which the speed at the time of transition is set high until the bottom dead center is performed. As a result, the change from the fast speed side to the slow speed side becomes faster, and as a result, the speed fluctuation amount on the low pressure side becomes larger than the speed fluctuation amount on the high pressure side, and a larger water discharge group can be generated. it can.
That is, by controlling the rotational speed of the motor 911 by the control unit 10, it is between the top dead center where the speed is highest (pressure is increased) and the bottom dead center where the speed is slowest (pressure is reduced). The desired piston speed can be obtained at
Further, control is performed such that the speed at which the piston 910b is shifted from the top dead center to the bottom dead center is higher. As a result, the pressure formed in the vicinity of the bottom dead center can be further lowered, so that the low pressure region can be enlarged. As a result, the speed fluctuation amount in the low pressure region can be further increased, so that a larger water discharge group can be generated.
In this case, the number of cylinders is not limited to one. A plurality of pressurizing chambers may be provided in one cylinder.

  FIG. 20 is a schematic diagram for illustrating a case where the rotational speed of the motor is controlled. FIG. 20A shows pressure fluctuations that can generate the above-described “large water discharge group” and “small water discharge group”. That is, the pressure fluctuation as illustrated in FIG. 3 is represented. FIG. 20B shows a change in the position of the piston when such pressure fluctuation is caused, and FIG. 20C shows a change in the rotational speed ratio of the motor with respect to the position of the piston.

As described above, when generating a “large water discharge group”, it is necessary to discharge water at a low pressure so that the follow-up amount increases. In addition, when generating a “small water discharge group”, it is necessary to discharge water at a high pressure. Then, in order to allow the “large water discharge group” and the “small water discharge group” to land independently on the object to be cleaned, a pressure region in which the “large water discharge group” is generated and a “small water discharge group” are generated. It is necessary to create a time interval between the pressure region.
In the present embodiment, the "large water discharge group" is generated by controlling the piston ascent speed in the region where the piston ascends and pressurizes from the bottom dead center, that is, by controlling the rotational speed of the motor. Like to do. In addition, a “small water discharge group” is generated by controlling the rising speed of the piston in a region where the piston approaches the top dead center and the pressure further increases, that is, by controlling the rotational speed of the motor. An area where the motor speed ratio is small is provided between the areas where these are generated, and between the pressure area where the “large water discharge group” is generated and the pressure area where the “small water discharge group” is generated. Causes a time interval.
Further, the pressure in the pressurizing chamber is reduced by setting the motor rotation speed ratio high in the step of moving the piston from the top dead center to the bottom dead center (the step of flowing the washing water into the pressurizing chamber). ing. By doing so, the pressure formed in the vicinity of the bottom dead center can be further lowered, so that the low pressure region can be enlarged. As a result, the speed fluctuation amount in the low pressure region can be further increased, so that a larger water discharge group can be generated.
Subsequently, the sixth embodiment will be exemplified.
FIG. 21 is a schematic configuration cross-sectional view for illustrating a motor type reciprocating type pulsation generator (water discharger) 90e.
The pulsation generation unit 90e has a double configuration including a first pulsation generation unit 191 and a second pulsation generation unit 192. The first pulsation generator 191 and the second pulsation generator 192 are provided with cylinders 191a and 192a each having a cylindrical space. Pistons 191b and 192b are provided in the cylinders 191a and 192a. O-rings (not shown) are attached to the pistons 191b and 192b. Respective spaces defined by the pistons 191b and 192b and the cylinders 191a and 192a become pressure chambers 191d and 192d.

The pressurizing chambers 191d and 192d are respectively provided with cleaning water inlets (not shown). A pipe line (not shown) branched from the water supply pipe 67 is connected to the cleaning water inlet so that the cleaning water can flow into the pressurizing chambers 191d and 192d from the water supply pipe 67. In addition, an umbrella packing (not shown) is provided at a portion where the cleaning water inlet (not shown) opens to the pressurizing chambers 191d and 192d so that the cleaning water flowing into the pressurizing chambers 191d and 192d does not flow backward to the water supply pipe 67 side. It has become.
Further, washing water outlets 191g and 192g are provided in the ceiling portions of the pressurizing chambers 191d and 192d, respectively. Pipes are connected to the washing water outlets 191g and 192g, respectively, and each connected pipe is connected to the water supply pipe line 75 via a branch portion. Therefore, the wash water that has flowed out of the pressurizing chambers 191d and 192d joins in the middle, and flows out to the water supply line 75 as pressurized wash water.

A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913a are engaged with each other. One end of a crankshaft 194 for operating the piston 191b is attached to the gear 913a. The other end of the crankshaft 194a is attached to the piston 191b.
Further, the gear 912 and the gear 913b are engaged with each other. One end of a crankshaft 194b that operates the piston 192b is attached to the gear 913b. The other end of the crankshaft 194b is attached to the piston 192b.
The pitch circle diameter of the gear 913b is twice the pitch circle diameter of the gear 913a. Therefore, the movement cycle of the piston 192b is twice the movement cycle of the piston 191b.
The volume of the pressurizing chamber 192d is larger than the volume of the pressurizing chamber 191d. That is, the diameter dimension (cross-sectional dimension) of the pressurizing chamber 192d is larger than the diameter dimension (cross-sectional dimension) of the pressurizing chamber 191d. Further, the stroke of the piston 192b is larger than the stroke of the piston 191b.

Next, the pressure fluctuation formed by the pulsation generator 90e is illustrated.
FIG. 22 is a schematic diagram for illustrating a pressure waveform. FIG. 22A is a schematic diagram for illustrating how a pressure waveform is formed, and FIG. 22B is a schematic diagram for illustrating how a water discharge group is generated.
As shown in FIG. 22A, the pressure waveform formed by the first pulsation generator 191 is as shown by “X” in the figure. On the other hand, the pressure waveform formed by the second pulsation generator 192 is as “Y” in the figure.
As described above, since the volume of the pressurizing chamber 192d is larger than the volume of the pressurizing chamber 191d, the maximum pressure in the pressure waveform “Y” is larger than the maximum pressure in the pressure waveform “X”. Further, the cycle of the pressure waveform “Y” is twice the cycle of the pressure waveform “X”.

  As described above, since the cleaning water discharged from the first pulsation generator 191 and the cleaning water discharged from the second pulsation generator 192 are merged, the pressure of the washing water after merging is a combination of both pressures. Will be. That is, the pressure fluctuation of the washing water discharged to the nozzle 82 through the water supply pipe line 75 becomes a pressure waveform “Z” obtained by combining the pressure waveform “X” and the pressure waveform “Y”.

Here, as shown in FIG. 22B, the pressure waveform “Z” is a periodic waveform having one convex peak and an inflection point where the front and rear inclinations are positive in one pulsation cycle MT. It can be seen that the pulsation changes.
Therefore, also in the present embodiment, the above-described “large water discharge group” and “small water discharge group” can be generated.

In the example illustrated in FIG. 22, “large water discharge group” and “small water discharge group” are alternately generated, but the present invention is not limited to this.
In this case, for example, by changing the period and amplitude of the pressure waveform “X” and the period and amplitude of the pressure waveform “Y” as appropriate, the order in which “large water discharge group” and “small water discharge group” are generated is changed. can do. For example, it is possible to repeat a water discharge cycle in which a “small water discharge group” is generated after a “large water discharge group” and then a “small water discharge group” is generated.

Subsequently, the seventh embodiment will be exemplified.
FIG. 23 is a schematic cross-sectional view of a pulsation generator (water discharger) 90f. It should be noted that the pulsation generating part referred to here can also be referred to as a pressure fluctuation part causing pressure fluctuation.

  As shown in FIG. 23, the pulsation generator 90f is provided in a cylinder 74b connected to the water supply pipes 67 and 75, a plunger 74c provided inside the cylinder 74b so as to freely advance and retract, and provided in the plunger 74c. A check valve 74g and a pulsation generating coil 74d that moves the plunger 74c back and forth by controlling the excitation voltage are provided. When the position of the plunger 74c changes to the nozzle side (downstream side), the pressure of the washing water increases. When the position of the plunger 74c changes to the side opposite to the nozzle (upstream side), the washing water pressure increases. A check valve is arranged so as to decrease.

  The plunger 74c is advanced and retracted upstream and downstream by controlling the excitation of the pulsation generating coil 74d. That is, when pulsation is added to the cleaning water (when pressure fluctuation is caused in the cleaning water), the plunger 74c is moved in the axial direction of the cylinder 74b (upstream direction / Advancing and retreating in the downstream direction).

In this case, the plunger 74c moves from the illustrated original position (plunger original position) to the downstream side 74h by excitation of the pulsation generating coil 74d. When the excitation of the coil disappears, it returns to the original position by the urging force of the return spring 74f. At this time, the return operation of the plunger 74c is buffered by the buffer spring 74e. The plunger 74c is provided with a duckbill check valve 74g therein to prevent backflow upstream. Therefore, when the plunger moves from the original position to the downstream side, the washing water in the shilling 74b can be pressurized and pushed into the water supply pipe 75. At this time, since the plunger original position and the position moved downstream are always constant, the amount of washing water sent to the water supply pipe 75 when the plunger 74c operates is constant.
Thereafter, when returning to the original position, the washing water flows into the cylinder 74b through the check valve 74g. Therefore, at the next downstream movement of the plunger 74 c, a fixed amount of washing water is sent to the water supply pipe 75 again.

  In this case, the pulsation generator 90f is supplied with the above-described flush water through the water supply pipe 55. Therefore, as described above, the wash water that has flowed into the cylinder 74b through the check valve 74g during the return of the plunger 74c to the original position is affected by pressure loss due to the check valve 74g and drawing of wash water downstream. Although the primary pressure is not maintained, it is sent to the water supply line 75. That is, the wash water that has flowed into the cylinder 74 b through the check valve 74 g before the plunger 74 c returns to the original position flows out toward the water supply pipe 75. In this case, the pressure of the cleaning water flowing out to the water supply pipe 75 is different from the primary pressure (the above-mentioned water supply pressure) due to the pressure loss due to the check valve 74g and the influence of the downstream cleaning water drawing. It becomes.

  This is shown in the figure.

FIG. 24 is a schematic diagram for illustrating the state of the pressure fluctuation of the cleaning water.
As shown in FIG. 24, the wash water is sent from the pulsation generator 90f to the water supply pipe 75 and eventually to the nozzle unit 80 at a pressure pulsated based on the introduction water pressure Pin (feed water pressure) to the pulsation generator 90f. Water is discharged toward the item to be cleaned. Note that the pressure waveform shown in FIG. 24 is measured in the water discharge hole 401 or the water discharge hole 402 described above or the cleaning vortex chamber 301 or 302 communicating with these. In addition, a pressure gauge with high responsiveness was used, and measurement was performed at a high sampling period.

Here, the state of water discharge of the washing water in this embodiment is illustrated.
FIG. 25 is a voltage waveform diagram showing a state of excitation of the pulsation generating coil 74d of the pulsation generating unit 90f that generates pulsation when water is discharged from the washing water (schematic diagram for illustrating a voltage waveform applied to the pulsation generating coil 74d). FIG. 26 is a timing chart showing the speed (initial speed) of the washing water flowing out from the pulsation generator 90f.

  The controller 10 outputs a pulse signal when the pulsation generating coil 74d is excited to generate pulsation in the pulsation generating unit 90f. Then, this pulse signal is connected to the pulsation generating coil 74d and outputted to a switching transistor (not shown) for turning it on. That is, a switching transistor (not shown) that opens and closes the circuit is connected to the pulsation generating coil 74d. The pulse signal output from the control unit 10 is input to the switching transistor.

Therefore, the pulsation generating coil 74d is repeatedly excited by turning ON / OFF the switching transistor according to the pulse signal, and periodically reciprocates (advances and retreats) the plunger 74c as described above. That is, the switching transistor is opened and closed (ON / OFF operation) based on the input pulse signal, whereby the pulsation generating coil 74d is repeatedly excited. Then, by repeatedly exciting the pulsation generating coil 74d, the plunger 74c is periodically reciprocated (advanced and retracted).
Accordingly, the cleaning water is supplied from the pulsation generator 90f to the water discharge holes 401 in a pulsating flow state in which the pressure periodically fluctuates up and down, and the pulsating flow cleaning water is discharged from each water discharge hole.

  Note that the pulse voltage applied to the pulsation generating coil 74d is illustrated in FIG. In addition, FIG. 26 illustrates a timing chart of the speed (initial speed) of the wash water flowing out from the pulsation generator 90f. FIG. 26 shows a waveform calculated based on the pressure value shown in FIG.

  From FIG. 25, the pulsed voltage applied to the pulsation generating coil 74d of the pulsation generating unit 90f is a voltage waveform in which two rectangular waves having different ON times are combined in one cycle. The change in the speed of the washing water flowing out from the pulsation generation unit 90f caused by this control will be illustrated based on the operation of the plunger 74c of the pulsation generation unit 90f. A voltage having a voltage waveform shown in FIG. 25 is applied to the pulsation generating coil 74d of the pulsation generating unit 90f.

  When a voltage is applied to the pulsation generating coil 74d of the pulsation generating unit 90f at the ON time T1, a current flows, so the pulsation generating coil 74d is excited and the plunger 74c is magnetized. When the plunger 74c is magnetized, the plunger 74c is attracted toward the pulsation generating coil 74d, that is, the downstream side.

  The return spring 74f is compressed and stores elastic energy due to the attraction to the downstream side. At the same time, the cleaning water is pressurized, and when reaching the highest pressure P24, the speed of the cleaning water discharged from the water discharge hole 401 is the highest. It becomes higher (V24). That is, when the plunger 74c is attracted to the downstream side, the return spring 74f is compressed and elastic energy is stored. At the same time, the washing water is pressurized by the plunger 74c. Note that when the pressure of the cleaning water reaches the highest pressure P24 (see FIG. 24), the speed of the cleaning water discharged from the water discharge holes 401 becomes the highest (V24 in FIG. 26).

  Thereafter, when the voltage is cut off at T2, the excitation of the pulsation generating coil 74d disappears, and the urging force of the return spring 74f is received to return to the original position. That is, when the application of voltage is stopped at the OFF time T2, the excitation of the pulsation generating coil 74d is released, and the plunger 74c is returned to the original position by the urging force of the return spring 74f.

At the same time, the pressure decreases and reaches the minimum pressure P21 (see FIG. 24). At that time, the speed of the cleaning water discharged from the water discharge hole 401 is also lowered and falls to the lowest speed range V21.
Thereafter, the pressure tries to return to the water supply pressure Pin, and the speed also tries to return to the speed Vin at the time of the water supply pressure. By applying a rectangular wave of T3 having an ON time shorter than T1 to this return timing, the pulsation generating coil 74d is excited, and the plunger 74c is attracted to the downstream side, whereby the washing water is pressurized again. That is, at this recovery timing, a rectangular wave voltage having a T3 shorter ON time than T1 is applied to the pulsation generating coil 74d. Then, the pulsation generating coil 74d is excited to attract the plunger 74c to the downstream side, thereby pressurizing the cleaning water again.

  At this time, since the pressure is in the process of returning and the time T3 is shorter than T1, the wash water does not increase up to the maximum pressure P24, but reaches the second peak pressure P22 higher than the supply water pressure. Therefore, the second peak speed V22, which is faster than the speed at the time of water supply pressure, appears. Further, a period of time during which water is discharged in the vicinity of the speed Vin at the time of the incoming water pressure is generated between the second peak speed V22 and the speed V23 when the plunger is excited again.

  Here, the timing of the voltage waveform applied to the pulsation generating coil 74d is a pulsation frequency of 50 Hz, and T1 is set to 4.8 msec, T2 is set to 7 msec, T3 is set to 1 msec, and T4 is set to 7.2 msec. That is, the pulsation frequency is 50 Hz, the ON time T1 is 4.8 msec, the OFF time T2 is 7 msec, the ON time T3 is 1 msec, and the OFF time T4 is 7.2 msec. However, the time width of the frequency, T1, T2, T3, and T4 is not limited to this, and may be any repetition frequency in the dead band frequency region of 5 Hz or more, and the time width of T1, T2, T3, and T4 is also the period (pulsation period). MT) may be set. The dead band frequency is a frequency higher than a frequency at which a person can recognize a stimulus change, that is, a frequency at which a person cannot perceive intentional repeated water discharge.

Subsequently, the state of the washing water obtained by the velocity waveform created as described above will be exemplified.
FIG. 27 is a schematic diagram for illustrating a process of amplifying the discharged wash water when pulsating wash water is discharged from the assumed water discharge hole 40.
Here, the relationship between the pressure fluctuation and the speed change will be illustrated with reference to FIGS. 24 and 26. When the pressure pulsates by the pulsation generator 90f, the speed V also fluctuates similarly. In other words, when the pressure fluctuation of the discharged water is Pmax, the speed also becomes the maximum speed Vmax, and the instantaneous speed varies with time. Also, assuming that each part in the pressure waveform of the pulsating wash water in FIG. 24 is P21, P22, P23, P24, P25, the speeds of V21, V22, V23, V24, V25 in FIG. Correspond.

  Accordingly, since the speed V22 is faster than the speed V21 as it moves from (A) to (D) in FIG. 27 immediately after water discharge, the wash water discharged at the speed V21 is the wash water discharged at the speed V22 and The water is caught up and merged with the wash water between them to form a water discharge group having a large water discharge cross-sectional area (see FIG. 27B).

  Thus, in the rising slope portion of the velocity waveform, the wash water discharged at a high speed is sequentially combined with the wash water discharged at a slow speed before that to form a water discharge group to be cleaned. It will land on the (clean surface). Here, as shown in (A) and (B) of FIG. 27, since the overall speed is low in the rising slope portion of the speed in the slow speed range, V22 before landing on the object to be cleaned. Can be combined with V21 to generate a water discharge group having a large water discharge cross-sectional area (a large water discharge group).

That is, the overall speed is low in the rising slope portion between the speed V21 and the speed V22. Therefore, before the cleaning water discharged at the speed V21 reaches the object to be cleaned, the cleaning water discharged at the speed V22 can catch up with the cleaning water discharged at the speed V21. As a result, at the time of water discharge, the wash water is discharged in a straight line without being expanded into a conical shape, but before landing on the object to be cleaned, the water was discharged at the speed V21 and the wash water discharged at the speed V22. Combined with the wash water, a water discharge group having a large water discharge cross-sectional area (a large water discharge group) can be generated.
On the other hand, as shown in (C) and (D) of FIG. 27, since the overall speed is high in the rising slope of the speed in the speed range on the fast side of V23 and V24, the object is washed. Since the distance is not easily reduced in the short time until V24, when V24 reaches the object to be cleaned, V24 does not almost merge with V23 and quickly reaches the water discharge group having a small water discharge cross-sectional area.
That is, the entire speed is high in the rising slope portion between the speed V23 and the speed V24. Therefore, before the cleaning water discharged at the speed V23 reaches the object to be cleaned, the cleaning water discharged at the speed V24 hardly catches up with the cleaning water discharged at the speed V23. As a result, the cleaning water is discharged linearly without being expanded into a conical shape, and the cleaning water discharged at the speed V23 and the cleaning water discharged at the speed V24 before landing on the object to be cleaned. Almost no coalescence, and water is landed as a water discharge group (small water discharge group) with a small water discharge cross-sectional area. When the cleaning water (small water discharge group) hits the object to be cleaned, the velocity component in the collision energy (force for removing dirt) is large.

At this time, the timing of V22 and V24 is sufficiently wide, in other words, by controlling so that peaks appear in V22 and V24, the water discharge group generated by V22 and the water discharge group generated by V24 are , A sufficient time difference occurs when V24 is discharged.
That is, by providing the OFF time T2, a sufficient time gap can be provided between the cleaning water discharged at the speed V24 and the cleaning water discharged at the speed V22.
As a result, the water discharge cross-sectional area generated by discharging water at the speed V22 is large and the water discharge group (large water discharge group) having a slower speed than that generated by discharging water at the speed V24, and water discharged at the speed V24. Thus, the water discharge cross-sectional area generated by this and the water discharge group (small water discharge group) having a high speed and small speed can independently land on the object to be cleaned at different speeds without interfering with each other.

  Further, at the timing of shifting from the speed V24 to the speed V21, the speed is reduced, so that a water discharge group due to coalescence is not generated, and the region does not contribute to the cleaning performance. Therefore, reducing this area also leads to an increase in cleaning performance.

  In addition, the water discharge group referred to in the present specification means that the cross-sectional area when cut at right angles to the traveling direction of the wash water discharged from the water discharge hole is immediately after the water discharge from the water discharge hole by following the water discharge. If it is larger than the cross-sectional area, it is called a water discharge group. That is, the water discharge group means that the wash water discharged later catches up and the water discharge cross-sectional area (the cross-sectional area when cut at right angles to the traveling direction of the wash water) becomes larger than the water discharge cross-sectional area immediately after water discharge. Say something.

Here, when the wash water catches up after the water discharge, the water discharge cross-sectional area increases, and when water discharge groups having different water discharge cross-sectional areas are formed, the load when hitting the object to be cleaned does not increase the water discharge cross-sectional area (the water discharge group Compared with water discharge (which is not formed), the load when hitting the object to be cleaned becomes large.
Also in the present embodiment, as illustrated in FIG. 8, the load increases at two timings in one cycle (pulsation cycle MT). That is, in one cycle, two water discharge groups are generated and hit the object to be cleaned independently.

  In the example illustrated in FIG. 8, the water discharge group (large water discharge group) having a large water discharge cross-sectional area is first hit, and the water discharge group (small water discharge group) having a small water discharge cross-sectional area and high speed is hit later. Accordingly, the object to be cleaned is washed by two water discharge groups having different speeds and sizes. In this case, a large and slow water discharge group (large water discharge group) is given a force to wash away dirt, and a small and fast water discharge group (small water discharge group). Group) can give the power to remove dirt.

  Here, in the velocity waveform in this case, the wash water discharged as a pulsating flow is generated by the slow and large water discharge group generated by discharging water at the speed V22 and by discharging water at the speed V24. Since a fast and small water discharge group appears for each pulsation cycle MT, a slow and large water discharge group and a fast and small water discharge group appear alternately. That is, the water discharge group appears at half the pulsation cycle MT. Therefore, even if the period (pulsation period MT) is long, more comfortable cleaning performance with a continuous feeling can be obtained, and more comfortable cleaning can be provided even for a person who does not like intermittent feeling. In addition, each of the water discharge groups is in a state in which the wash water discharged at the speed V24 is connected to the wash water discharged at the speed V25 and the speed V21, respectively.

  Next, the effect obtained by such a state of water discharge is illustrated. Here, the process in which a water discharge group having a large water discharge cross-sectional area is generated on the slow speed side is illustrated. The water discharge group is generated by catching the wash water from the high-speed water discharge to the wash water from the low-speed water discharge in the time interval until the wash water is discharged from the water discharge hole 40 and hits the object to be cleaned.

  At this time, if an attempt is made to generate a water discharge group in a region where the speed is high, the time required to reach the object to be cleaned from the water discharge hole 40 is short. For example, when the speed is 15 m / sec, the time to reach the object to be cleaned 60 mm ahead is 4 msec. On the other hand, when considering the region where the speed is low, the time until the object reaches the object to be cleaned from the water discharge hole 40 is longer than that in the region where the speed is high. For example, when the speed is 7.5 m / sec, the time to reach the object to be cleaned is 8 msec. At this time, if there is a speed difference of the same amount, the longer the time to reach the object to be cleaned, the larger the amount of cleaning water to catch up. That is, it is possible to efficiently generate a water discharge group having a larger water discharge cross-sectional area when the water discharge group is generated on the side where the washing water speed is low.

  The water discharge group generated in this way is a water discharge group having a larger water discharge cross-sectional area, and thus the water discharge cross-sectional area S is larger than usual. Accordingly, even though the amount of water to be washed is small, the water is discharged with a large water discharge cross-sectional area and has a washing performance that is washed at a high flow rate, that is, has the power to wash away dirt. In other words, if a water discharge group having a large water discharge cross-sectional area (a large water discharge group) is hit, even if the amount of the cleaning water used is reduced, the cleaning performance that is washed at a large flow rate, that is, dirt The power to wash away can be obtained.

  On the other hand, a water discharge group (small water discharge group) having a small water discharge cross-sectional area (small water discharge group) cannot easily catch up with the washing water previously discharged at the high speed V24, and before forming a water discharge group having a large water discharge cross-sectional area. In order to land on the object to be cleaned, the water discharge cross-sectional area is small, and the power to wash away dirt is poor. However, the fact that it cannot catch up with the previous washing water means that it can land on the object to be washed without absorbing the kinetic energy in the slow speed washing water. Can do.

  Since the impact force related to the force for removing the dirt at this time increases in speed, the impact force also increases. That is, although the power to wash away dirt is reduced, the power to remove dirt can be increased. Therefore, the ability to wash away dirt with a large and slow water discharge group (large water discharge group), and the ability to wash off dirt with a small and fast water discharge group (small water discharge group) gives the power to wash away dirt and the power to remove dirt. It is possible to achieve highly comfortable cleaning that is compatible with both.

  Since the large and slow water discharge group (large water discharge group) and the small and fast water discharge group (small water discharge group) each have sufficient impact force, they feel a pulsation of about half the cycle of the pulsation cycle MT. Since this sensation is sufficiently shorter than a sensation that can be identified by human beings, the sensation of washing and the ability to wash away dirt can be realized with a continuous feeling of washing.

Next, the phenomenon of water discharge group generation will be illustrated.
FIG. 28 is a timing chart showing a velocity waveform and a tracking curve. First, the following curve is illustrated. The follow-up curve indicates that even when the water is discharged and the water discharged at different speeds, if the water is on the curve, the object to be cleaned reaches 60 mm ahead. That is, the follow-up curve is a virtual curve for representing the relationship between the speed and water discharge timing when water is simultaneously landed at a water landing position at a predetermined distance (60 mm in the present embodiment).

  Wash water having a slower speed than the follow-up curve is followed by a fast wash water that comes later, and coalesces and reaches the object to be washed at the same time. Therefore, in the speed waveform, when the follow-up curve is overlapped with the speed of V22 as the base point (that is, when the follow-up curve obtained based on the speed of V22 is overlapped), the region of speed slower than this follow-up curve is All the washing water having the speed of V22 is followed, and a water discharge group whose integrated value is a volume is generated and landed on the object to be washed. In this case, the speed of the water discharge group is 12 m / sec, and the amount of the water discharge group is as large as 21 μL.

  On the other hand, in the follow-up curve drawn with V24 as the base point (that is, the follow-up curve obtained based on the speed of V24) and the speed waveform in the vicinity thereof, the slope is more sluggish than the follow-up curve, and the slow region “A "(Right side slope) is very small. In this case, although the amount of the water discharge group is small, the amount to be followed up is small, so that the high speed is absorbed into the low speed and the speed is not slowed down. That is, although the amount of washing water in the water discharge group is reduced, the kinetic energy of the fast washing water is less absorbed by the slow washing water. That is, a rapid water discharge group (small water discharge group) is generated although the water discharge cross-sectional area is small.

  In this case, the speed of the water discharge group is 14 m / sec, and the amount of washing water is 6 μl. From these things, that is, the force that removes dirt does not attenuate, and the object to be washed gets wet. From these things, in the water discharge group (large water discharge group) with a large water discharge cross-sectional area, since the amount of washing water increases, the same detergency as washing with a large amount of water can be obtained. Further, in a water discharge group having a small water discharge cross-sectional area and a high speed (small water discharge group), it is possible to feel the force of removing dirt in order to land on an object to be cleaned without decelerating. In addition, by applying this water discharge group (small water discharge group) to the object to be cleaned at a high frequency, it is possible to simultaneously feel the power to remove dirt and the power to wash away dirt. Moreover, if a large water discharge group and a small water discharge group are made to land on an object to be cleaned at the same time, it is possible to simultaneously realize the power for removing dirt and the power for washing dirt.

Here, jetting cross-sectional area is large in jetting water group, it has a 3.8 mm ² at approximately 12.6 mm ^2, and the small water group has a different jetting cross-sectional area. In this way, by generating a water discharge group in which the water discharge cross-sectional areas of the water discharge groups generated by the tracking are relatively different, a water discharge group having different forces for removing dirt and power for washing out the dirt is generated and applied individually. Thus, it is possible to achieve both the power to remove dirt and the power to wash away dirt.

  In addition, if it becomes larger than the water discharge cross-sectional area converted by the diameter of a water discharge hole by the follow-up of washing water, it will become a water discharge group. In addition, if the water discharge group generated by the follow-up has a relatively different water discharge cross-sectional area and is generated at a point where the discharged water reaches the object to be cleaned, a different water discharge group is generated. That is, if water discharge groups having relatively different water discharge cross-sectional areas are generated by the follow-up of the wash water discharged after the water reaches the object to be cleaned, different water discharge groups are generated. Become.

  Furthermore, in the dead band frequency region of 5 Hz or more, by causing each water discharge group to land at least once, it is possible to simultaneously feel the power to remove dirt and the power to wash away dirt. That is, the pulsation frequency may be 5 Hz or more.

Next, the cleaning performance in the present embodiment will be described.
The cleaning performance is considered to be composed of a force to remove dirt and a force to wash away dirt, and was considered to depend on the impact force M · V of water. Here, the force for removing dirt refers to the force for removing dirt by impact caused by the speed of quick water discharge against an object to be cleaned, and depends on the speed V. In addition, when the object to be cleaned is a human body, the user feels a sense of irritation close to pain due to the high speed, and also feels a sense of irritation at the same time as receiving the water discharged to remove dirt. become. On the other hand, the force to wash away the dirt is the force to wash away the dirt depending on the area and the amount of water when the water discharge having a large water discharge cross-sectional area S (weight M) is applied with sufficient force, and the water discharge cross-sectional area S (weight) M). In addition, when the object to be cleaned is a human body, water discharged with a large water discharge cross-sectional area S (weight M) hits the human body, so that the user feels as if the user is washing with a large amount of water. You will feel it. In this way, the feeling of washing is expressed as a feeling of stimulation and a feeling of volume, and it can be considered that each of them corresponds to a feeling of removing dirt and a feeling of washing away dirt. Therefore, by satisfying all of these physical quantities, it is possible to realize comfortable and high cleaning performance.

  However, from the viewpoint of energy saving, the amount of washing water is 500 ml / min or less in the hot water generation by the instantaneous heat exchanger which is currently mainstream. Therefore, it is difficult to satisfy all these physical quantities. Therefore, in order to satisfy all these physical quantities, the generation of water discharge groups was examined.

  Next, as an example of the velocity waveform of the pulsation transition and the shape of the generated water discharge group, “fast water discharge group”, “large water discharge group”, and “distributed water discharge group” will be described. The relationship is an example, and the relationship is not necessarily generated due to a difference in speed range. “Fast water discharge group” is a water discharge group in which the rising speed of the speed is gentler than the slope of the follow-up curve described above, that is, the amount of follow-up is reduced by decreasing the rate of increase in the speed of water discharge. Is fast but has little water. That is, a water discharge group is generated that has the power to remove dirt, but has little power to wash away dirt.

  The “large water discharge group” is a water discharge group that is gathered by gradually following the rising slope of the speed close to the slope of the follow-up curve, that is, a water discharge group having a large water discharge cross-sectional area. In this case, since the speed is reduced, there is not much force for removing dirt, but a water discharge group having a large amount of washing water and a large impact force is generated.

  The “dispersed water discharge group” makes the rise of the speed steeper than the slope of the follow-up curve, so that the speed difference between the slow speed and the fast speed is large, and the high-speed water discharge comes first. It is a water discharge group that disperses water discharge so as to blow off water at a certain slow speed. In this case, an apparent water discharge cross-sectional area is increased to generate a water discharge group having a large force to wash away dirt.

  As described above, by generating different pulsating flows, different types of water discharge groups having different characteristics can be generated.

  That is, a water discharge group having different shapes and characteristics can be generated by different pulsating flows. However, on the other hand, one of the physical quantities related to the power to remove dirt and the power to wash away dirt has to be applied.

  Therefore, when the object to be cleaned is a human body, these different types of water discharge groups are used at least once in the dead band frequency range of about 5 Hz or more where human perception cannot follow vibration based on intentional repeated water discharge. Each of the water discharges creates a sensation of washing away physical dirt, and each hits independently as a water discharge group, but because it lands within the deadband frequency range, all physical quantities are In other words, it is possible to simultaneously feel water discharge having a power to remove dirt and a power to wash away dirt.

  That is, different water discharge groups are allowed to land on the object to be cleaned at least once in a dead band frequency range of about 5 Hz or more, which cannot be perceived as intentional repeated water discharge. In this case, different water discharge groups create their own sense of washing away physical stains, but different water discharge groups land in the dead band frequency range, so they have all physical quantities, i.e., the power to remove dirt and dirt. It is possible to feel that water is discharged with the power to wash away water.

  As described above, by changing the size, speed, and follow-up amount of the water discharge group, water discharge groups having different physical quantities are formed, and water discharge groups having different cleaning powers are generated. And water discharge provided with a plurality of detergency is realized by making an object to be washed land in a short time while making such a water discharge group independent.

  Here, an example of the combination will be described.

  First, a “large water discharge group” and a “fast water discharge group” can be alternately generated, and can be allowed to land independently on an object to be cleaned.

  In such water discharge, first, the “large water discharge group” is generated by increasing the amount of water discharged. In this case, the fast speed part is attenuated by following up, and the speed is slowed down, so that the power to remove dirt becomes poor. However, since the size of the water discharge cross-sectional area of the water discharge group is increased, the water discharge group has a certain area, and the impact force is increased, it is possible to feel the force of washing away dirt.

  In addition, the “fast water discharge group” reduces the amount of water to be followed later, so that the water discharge cross-sectional area of the water discharge group is smaller than the “large water discharge”, but it removes dirt because there is no deceleration of the water discharge speed. Water can be discharged while maintaining power.

  It is possible to make the two types of water discharge groups feel water discharge having both the power to remove dirt and the power to wash out dirt by landing each at least once within the dead band frequency range (5 Hz or more).

  Next, a “dispersed water discharge group” and a “large water discharge group” can be alternately generated, and can be allowed to land on an object to be cleaned independently. In this case, the “dispersed water discharge group” provides a power to wash out very high dirt. In addition, since a “large water discharge group” having a large amount of follow-up is generated later, the water discharge group having a sufficient impact force can be applied to the object to be cleaned. In this case, the “large water discharge group” has a volume and a certain speed, so that the weight of the water discharge can be felt. In this case, since the “large water discharge group” hits the object to be cleaned at a faster speed than the “dispersed water discharge group”, the water discharge gives more power to remove dirt than the “dispersed water discharge group”. Therefore, the “dispersed water discharge group” and the “large water discharge group” can also be made to feel water discharge having both the power to remove dirt and the power to wash away dirt.

  Furthermore, “distributed water discharge group” and “fast water discharge group” can be generated alternately. By doing so, it is possible to obtain the power to wash away large dirt by the “dispersed water discharge group” and to feel the power to remove the dirt by the “fast water discharge group”.

  These water discharge groups may be generated by combining three forms (“fast water discharge group”, “large water discharge group”, and “dispersed water discharge group”). By doing so, it is possible to realize water discharge with a very high cleaning power and a strong cleaning power.

  That is, the water discharge group is formed not only in the form illustrated in FIG. 27 but also in combination with various forms such as “fast water discharge group”, “large water discharge group”, “distributed water discharge group”, and the like. Also good. By combining water discharge groups of different physical quantities, water discharge having the power to wash out very high dirt and the power to remove dirt can be made.

  In this case, the order in which the water discharge group is formed may be an order other than that illustrated, or the order may be changed every time. Further, the timing at which the water discharge group lands on the object to be cleaned is not necessarily regular, and the intervals may be different. In this case, for example, a frequency table in which the pulsation period changes may be prepared in advance, and the frequency may be regularly changed within the dead band frequency range. Further, the frequency may be randomly varied within the dead band frequency range. Further, pulsation may be generated sporadically.

  Thus, in this Embodiment, a different detergency can be produced | generated by a different water discharge group, and a plurality of water discharge groups can be applied within a dead zone frequency range, and a different detergency can be produced | generated by each water discharge group. That is, by forming water discharge groups with different physical quantities and individually applying a plurality of water discharge groups to the object to be cleaned within the dead band frequency range, different cleaning power can be given to each water discharge group.

  In addition, these are examples of a water discharge group, and a combination is only an example. In this case, it is important to create different cleaning power by different water discharge groups and to realize high cleaning performance by supplementing insufficient cleaning power and physical quantity. That is, it suffices if high cleaning performance can be provided by making up for different cleaning power and physical quantity by creating different cleaning power with different water discharge groups.

  In addition, regarding the water discharge group, the case of the pulsation generation unit 90f illustrated in FIG. 23 is described as an example, but the same applies to the case of the pulsation generation unit according to another embodiment.

FIG. 29 is a graph for illustrating the state of the pressure fluctuation of the washing water.
Note that FIG. 29A corresponds to FIG. 24 and is obtained by actually measuring the pressure waveform. In this case, the pressure of the cleaning water was measured in the water discharge holes 401 or 402 or the cleaning vortex chamber 301 or 302 communicating therewith. In addition, a pressure gauge with high responsiveness was used, and measurement was performed at a high sampling period. FIG. 29B corresponds to FIG. 25 and shows the waveform of the pulsed voltage applied to the pulsation generating coil 74d.
FIG. 30 is a schematic diagram for illustrating the timing of voltage application, the operation of the plunger, the pressure waveform, and the state of the discharged wash water. Note that the upper diagram in the “state of water discharged” column shows the state immediately after the water discharge, and the lower diagram shows the state immediately before the object is washed. Further, a, b, c, d, and e in the figure represent the wash water discharged in the case of pressures a, b, c, d, and e, respectively.

  As shown in FIG. 30 [I], a high pressure region is formed by positive pressurization from the vicinity of the feed water pressure, and a small water discharge group is generated at a high speed in the high pressure region. Since the speed can be increased in the high pressure region, the time to reach the object to be cleaned can be shortened. Therefore, it is suppressed that the wash water discharged later catches up with the wash water discharged previously. As a result, it is easy to generate a small water discharge group having a high speed.

In this case, when a voltage is applied to the pulsation generating coil 74d (not shown) with the ON time T1, a current flows through the pulsation generating coil 74d, so that the pulsation generating coil 74d is excited and the plunger 74c is magnetized. When the plunger 74c is magnetized, the plunger 74c is attracted toward the pulsation generating coil 74d, that is, the downstream side. The washing water is pressurized by the attraction to the downstream side, and rises from the pressure a in the vicinity of the feed water pressure (for example, about 0.110 MPa) to the highest pressure b.
That is, as shown in FIG. 29, when a voltage is applied to the pulsation generating coil 74d at the ON time T1, the pressure of the cleaning water rises from the pressure P23 near the feed water pressure to the highest pressure P24. At this time, when the pressure fluctuates, the speed fluctuates in a corresponding manner.

Here, as described above, the overall speed is high in the rising slope portion of the speed between the speed V23 corresponding to the pressure P23 (pressure a) and the speed V24 corresponding to the pressure P24 (pressure b).
For this reason, as shown in the column “State of washed water discharged” in FIG. 30 [I], the washing water b discharged later at the speed V24 is unlikely to catch up with the washing water a discharged earlier at the speed V23. . As a result, the washing water a discharged at the speed V23 and the washing water b discharged at the speed V24 hardly merge, and land on the object to be cleaned as a small water discharge group. In this case, since the speed V23 and the speed V24 are high, a small water discharge group with a high speed is generated.

As shown in FIG. 30 [II], when the voltage application is stopped after the ON time T1, the plunger 74c is returned to the original position by the urging force of the return spring 74f. Therefore, the pressure of the washing water decreases from the pressure b to the pressure c.
In this case, the speed of the wash water discharged earlier at the pressure b is faster than the speed of the wash water discharged later at the pressure c.
Therefore, as shown in the “state of discharged water” in FIG. 33 [II], the water discharged later cannot catch up, and each of the water reaches the object to be cleaned. In this case, compared with the case of FIG. 33 [I], the speed of the washing water is slow and the amount of the washing water is reduced, so that the contribution to increasing the power for removing dirt and the power for washing away dirt is reduced.

As shown in FIG. 30 [III], when the pressure is lower than the water supply pressure, the generation of a large water discharge group with a low speed is started. That is, water discharge is started at the pressure c.
In this case, as illustrated in FIG. 30 [II], the cleaning water is drawn when the plunger 74c returns to the original position by the urging force of the return spring 74f, so that the pressure c becomes lower than the water supply pressure. Therefore, a region having a pressure lower than the feed water pressure can be easily formed. Since the speed can be reduced in the region where the pressure is lower than the feed water pressure, the time required to reach the object to be cleaned can be lengthened. For this reason, since the amount of wash water discharged later can catch up with the wash water discharged earlier, it is easy to generate a large water discharge group with a low speed.

In addition, as shown in FIG. 30 [IV], in the latter half of the process of generating a large water discharge group with a low speed, a voltage is applied to the pulsation generating coil 74d with the ON time as T3. Even when a voltage is applied to the pulsation generating coil 74d with the ON time T3, the washing water is pressurized by the plunger 74c being attracted, and the pressure rises. However, since the pressure is in the process of returning and the time T3 is shorter than T1, the pressure does not increase to the pressure b, but rises to a pressure d that is a second peak slightly higher than the feed water pressure.
That is, as shown in FIG. 29, when a voltage is applied to the pulsation generating coil 74d at the ON time T3, the pressure of the cleaning water does not increase up to the pressure P24, but the pressure P22, which is the second peak slightly higher than the supply water pressure. To rise.

Here, as described above, the overall speed is slow in the rising slope portion of the speed between the speed V21 corresponding to the pressure P21 (pressure c) and the speed V22 corresponding to the pressure P22 (pressure d). The speed V22 is faster than the speed V21.
Therefore, as shown in the column “State of washed water discharged” in FIGS. 30 [III] and [IV], the washed water c discharged at the speed V21 first and the washed water discharged at the speed V22 later. d can catch up. As a result, the cleaning water c discharged at the speed V21 and the cleaning water d discharged at the speed V22 are combined to form a large water discharge group. In this case, the speed V21 and the speed V22 are slower than the speed V23 and the speed V24. Therefore, a large water discharge group is generated with a low speed.

  Next, as shown in FIG. 30 [V], when the voltage application is stopped after the ON time T3, the plunger 74c returns to the original position by the urging force of the return spring 74f. In this case, since the pulling amount of the plunger 74c during the ON time T3 is small, the moving amount due to the urging force of the return spring 74f is also small. Therefore, it will be in a state where it is stationary in the vicinity of the original position. As described above, since the pressure d is slightly higher than the feed water pressure and the pressure e is about the feed water pressure, the pressure in this region is maintained near the feed water pressure.

In this case, the speed of the cleaning water d discharged earlier at the pressure d is substantially equal to the speed of the cleaning water e discharged later at the pressure e.
For this reason, as shown in the column “State of washed water discharged” in FIG. 30 [V], the washed water e discharged later cannot catch up, and each of them reaches the object to be cleaned. .

Here, by providing an OFF time between the end of the ON time T3 and the start of the ON time T1, sufficient time is provided between the cleaning water c to the cleaning water d and the cleaning water a to the cleaning water b. An opening can be provided. Therefore, the object to be cleaned can be obtained without interfering between the large spout group generated by the cleaning water c to the cleaning water d and the large spout group generated by the cleaning water a to the cleaning water b without interfering with each other. Can land independently at different speeds.
This leads to the creation of different water discharge groups at an equal timing within one cycle, and therefore it is possible to realize comfortable cleaning with little intermittent feeling even at a frequency lower than the dead band frequency range. Moreover, if each is made to land in a dead zone frequency range, it can also be made to feel that the water discharge with the power to remove dirt and the power to wash away dirt is being performed.

Moreover, if the pressure b (pressure P24) is further increased by positively pressurizing from the vicinity of the feed water pressure, the pressure c (pressure P21) formed thereafter can be further reduced. Therefore, it is possible to facilitate the formation of the above-mentioned “region of pressure lower than the feed water pressure”. Moreover, if positive pressurization is performed when the pressure returns to the feed water pressure, it is quick and A pressure in the vicinity of the feed water pressure can be obtained stably.

Next, a water discharge device according to the eighth embodiment is illustrated.
FIG. 31 shows a voltage waveform applied to the pulsation generator 90f, and FIG. 32 shows a timing chart of the change in the speed of water discharge caused by the pressure fluctuation of the pulsation generator 90f. In addition, since the structure of the water discharging apparatus is as substantially the same as what concerns on 1st Embodiment, detailed description is abbreviate | omitted.

  Here, in the water discharging apparatus etc. which concern on 1st Embodiment, in one pulsation period MT, the periodic pulsation transition which has at least 1 convex peak and the inflection point from which the front-back inclination becomes positive is shown. It is trying to generate. On the other hand, in this Embodiment, the water discharge group which has a different physical quantity on the basis of a tracking curve is produced | generated. The first bottom speed Va1 and the second bottom speed Va3 are made substantially the same.

  As shown in FIG. 31, the pulsation generating coil 74d of the pulsation generating unit 90f includes a region Ta1 that is intermittently applied during an ON time during one period, a Ta2 that is turned OFF for a certain period, and a region Ta3 that is subsequently turned ON. A pulse waveform with is added. That is, the pulsation generating coil 74d has a region Ta1 where voltage application is intermittently performed, a region Ta2 where voltage application is stopped after the region Ta1, and a region Ta3 where voltage application is performed after the region Ta2. A pulsed voltage is applied. The total period at this time is MT.

FIG. 32 is a timing chart of the fluctuation of the speed (initial speed) caused by this. In FIG. 32, the follow-up curve (dotted line) at the 60 mm point described above is drawn.
Next, the state of water discharge is illustrated based on FIG. Since the ON time is intermittent in the region Ta1 where voltage application is intermittently performed, the plunger 74c is sucked at a slightly slower speed than in the case of the region Ta3 where normal voltage application is performed. As a result, the speed increase from the first bottom speed Va1 to the first peak speed Va2 becomes slightly gentle.

  At this time, the rising slope of the speed is gentler than the slope of the follow-up curve, that is, the increase rate of the discharged water is small, so that the wash water discharged later hardly catches up. However, since the above-described deceleration due to the follow-up hardly occurs, a fast water discharge group is generated although the water discharge cross-sectional area is small (second water discharge group).

  On the other hand, in the region Ta3 where the voltage is applied for a certain period, the plunger 74c is sucked at a stroke, so that the speed rapidly increases from the second bottom speed Va3 and reaches the second peak speed Va4. Since the rising slope of the speed at this time is equal to or steeply equal to the slope of the follow-up curve, the follow-up of the wash water discharged later occurs, and a water discharge group having a large water discharge cross-sectional area is generated (first discharge) group).

At this time, the first water discharge group becomes a water discharge group having a large water discharge cross-sectional area when a large amount of washing water follows up, but at that time, deceleration due to the above-described follow-up occurs. Here, in the velocity waveform, the second peak Va4 is slightly higher than the first peak Va2, but the velocity Va4 is decelerated by the follow-up to the wash water discharged before, so the first water discharge The group has a slower speed at the time of landing on the object to be cleaned than the second water discharge group. Therefore, two types of water discharge groups with different speeds at the time of landing on the object to be cleaned and different water discharge cross-sectional areas are generated.
As a result, the large water discharge group and the small water discharge group alternately hit the object to be cleaned. Here, since the second water discharge group has a high speed and a small water discharge cross-sectional area, the pressure increases when it hits and gives a force to remove dirt. On the other hand, the first water discharge group has a large water discharge cross-sectional area, so that the pressure is dispersed and weakened.

  In this way, it is possible to generate both water discharge groups having different sizes of water discharge cross-sectional areas, and at the same time the dead zone frequency range is applied to the object to be cleaned at least once to achieve both the power to remove dirt and the power to wash away dirt.

  Note that the water discharge groups having different water discharge cross-sectional areas do not necessarily have to be generated alternately and regularly. What is necessary is just to make a to-be-washed object land at least once in a dead zone frequency range of 5 Hz or more, respectively. Further, the generated frequency may vary.

Next, the water discharging apparatus according to the ninth embodiment will be illustrated.
FIG. 33 is a schematic diagram for illustrating a case where a pressure accumulating unit is provided. In addition, the same code | symbol is attached | subjected to the component similar to what was mentioned above, and those description is abbreviate | omitted.
As shown in FIG. 33, the pulsation generator 90f and the flow rate adjusting / flow path switching valve 81 are connected by a pressure accumulating unit 75a. Further, the flow rate adjusting / flow path switching valve 81 and the nozzle 82 are connected by a pressure accumulating portion 86a.

The pressure accumulating portions 75a and 86a can be elastically deformed when subjected to water pressure. For example, it can be a tube made of resin or rubber.
The elastic energy stored in the pressure accumulating portions 75a and 86a after receiving the water pressure can be used to assist the pressurization of the washing water. In particular, the wash water can be effectively pressurized in a low pressure region. For example, in the region shown in “B” of FIG. 33, the cleaning water can be effectively pressurized.

In this case, by using the pressurizing action of the pressure accumulating portions 75a and 86a, the voltage application time in the region indicated by “B” can be shortened as indicated by “C”. Therefore, power consumption can be reduced, and the amount of heat generated by the pulsation generator 90f can be reduced.
In the example illustrated in FIG. 33, the pressure accumulating portion 75a and the pressure accumulating portion 86a are provided, but at least one of them may be provided.
Further, the elastic energy stored in the pressure accumulating parts 75a and 86a can be changed by appropriately selecting the spring constant of the material.

As a modification, air can be mixed at the tip of the nozzle 82 (swirl vortex chambers 301 and 302 in FIG. 4).
FIG. 34 is a waterway system diagram for illustrating a water discharger provided with an aeration unit. In addition, the same code | symbol is attached | subjected to the component similar to what was illustrated in FIG. 1, and those description is abbreviate | omitted.
As shown in FIG. 34, in the water channel system of the water discharger 1a, the constant flow valve 105, the water supply valve 106, the heat exchange unit 60, the accumulator 73, the pulsation generator 90, the flow rate adjustment are sequentially arranged from the supply source side (IN side). A cum-flow switching valve 81 and a nozzle 82 are provided. An air supply unit 107 that mixes air at the tip of the nozzle 82 and the control unit 10 are provided.

The constant flow valve 105 keeps the flow rate of the cleaning water supplied to the secondary side at a predetermined value. If the constant flow valve 105 is provided, the washing water having a predetermined flow rate can be flowed to the secondary side without being affected even if a pressure fluctuation occurs on the primary side. Moreover, when providing the water discharging apparatus 1a in a high water pressure environment, the function as what is called a limiter can also be fulfilled. Therefore, it is preferable to provide a constant flow valve.
The water supply valve 106 controls the inflow of cleaning water into the water discharger 1a by opening and closing the flow path. The control unit 10 controls the water supply valve 106, the heat exchange unit 60, the pulsation generation unit 90, the flow rate adjustment / flow path switching valve 81, and the air supply unit 107.

The air supply unit 107 can be configured by, for example, an air pump that forcibly introduces air.
The air pressurized by the air supply unit 107 is supplied into the nozzle 82 via a tube 107 a connected to the tip of the nozzle 82. In addition, it can also be made to supply to the flow volume adjustment and flow path switching valve 81 via the tube 107b. Here, the tube 107a and the tube 107b can also be referred to as an air mixing unit that mixes the air supplied from the air supply unit 107 into the cleaning water.
In this case, the timing at which the pressurized air is mixed can be adjusted by controlling the air supply unit 107 in accordance with the pressure fluctuation (see FIG. 3 and the like) generated by the pulsation generation unit 90.

  For example, the air supply unit 107 can be synchronously controlled based on the voltage waveform applied to the pulsation generation unit 90 so that air is mixed in the rising gradient range of the low-speed region. Thereby, since air is mixed in at the timing when a large water discharge group is generated, the water discharge group can be dispersed and spread over a wide range. That is, the apparent water discharge cross-sectional area can be increased by the air, and as a result, the power to wash away dirt can be increased.

  On the other hand, if air is not mixed in the high-speed region, the high-speed cleaning water is discharged without being dispersed, and the object to be cleaned can be landed while maintaining the high speed. According to the present embodiment, it is possible to achieve both the power for removing dirt and the power for washing dirt in a state where the power for washing dirt is higher. If air from the air supply unit 107 is mixed into the tip of the nozzle 82, air can be mixed efficiently. Further, since air is not mixed more than necessary in a high-speed region, it is possible to prevent the force for removing dirt from being attenuated by the air damper effect.

  In addition, when the cleaning water mixed with air is discharged from the water discharge hole, the cleaning water is not expanded in a conical shape at the time of discharging, but is discharged linearly, but the cleaning water is discharged by the air contained in the cleaning water. There is a case where it is separated into granular form without becoming a lump. In particular, such water discharge occurs when air is pumped and forcedly mixed into the wash water. Even in that case, the discharged wash water has a speed difference due to the pulsation generating portion (water discharge means) shown in the above-described embodiment. Therefore, even if the washing water is in the form of water particles separated into particles, the water particles discharged from the time later try to catch up with the water particles discharged before. If the water discharge rate is relatively slow, the water droplets discharged later will catch up with the previously discharged water droplets and overlap to grow into relatively large water droplets. On the other hand, if the water is discharged at a relatively high speed, the water droplets discharged later on the water will land on the object to be washed without catching up with the water particles discharged earlier. Without losing much of the speed of time, it reaches the object to be cleaned at a high speed in the form of small water droplets. These relatively large water droplets function as a large water discharge group having a large water discharge cross-sectional area, and give a force to wash away dirt by water landing on an object to be cleaned. The relatively small water droplets function as a small water discharge group having a small water discharge cross-sectional area but a high speed, and gives a force to remove dirt by landing on the object to be cleaned.

  Therefore, even when air is mixed into the washing water, water discharge that balances the power to wash dirt and the power to remove dirt is performed without destroying the effect of increasing the power to wash dirt and the power to remove dirt. Can do.

  Note that the air supply position from the air supply unit 107 is not limited to the tip of the nozzle 82, and air may be mixed into a pipe or the like on the upstream side of the nozzle 82. For example, as described above, air can also be supplied to the flow rate adjustment / flow path switching valve 81.

  In addition, the air supply unit 107 does not necessarily need to be able to be forcibly mixed, and may use natural suction. When natural suction is used, air is mixed as bubbles in the cleaning water. If air is mixed as bubbles in the washing water, the volume of the water discharge group can be increased. As a result, it is possible to achieve both the ability to remove dirt and the ability to wash away dirt while further increasing the ability to wash away dirt.

  According to embodiment of the water discharging apparatus illustrated above, it has comprised one of the following aspects.

  The water discharging device includes water discharging means for discharging water, and a nozzle provided downstream of the water discharging means and having water discharge holes for discharging the water toward the object to be cleaned. The first water discharge is performed so that the water discharged from the water discharge hole is not expanded in a conical shape when water is discharged from the nozzle. It is comprised and it is comprised so that it may become a larger water discharge cross-sectional area than the said 2nd water discharge in the water landing position of a to-be-washed | cleaned object, and the water discharged from the said water discharge hole is the said 2nd water discharge. It is configured not to be expanded in a conical shape when water is discharged from, and is configured to be faster than the first water discharge at the landing position of the object to be cleaned. The first water discharge and the second water discharge are discharged at different timings. It is configured to.

  It is more preferable that the first water discharge and the second water discharge are discharged toward the same part of the object to be cleaned and are simultaneously or alternately landed at the same water landing position.

  The fact that the first water discharge and the second water discharge are alternately discharged from the same water discharge hole means that the water discharge having an increased force for washing dirt and the water discharge having an increased force for removing the dirt are alternately discharged from the same water discharge hole. It becomes the composition that water is discharged. Therefore, the amount of water used can be greatly reduced, and when the object to be cleaned is a human body, the water landing position on the human body can be easily set to the same position. As a result, it is possible to make the user feel that the water discharge having the power to remove the dirt and the power to wash out the dirt is performed, and a high level of cleaning performance can be provided.

  In addition, the water discharging means may be configured so that the first water discharge is between the water discharge hole and the water landing position so that the first water discharge has a larger water discharge cross-sectional area than the second water discharge at the water landing position. The initial speed at the time of water discharge is slower than that of the second water discharge so that the amount of follow-up that the water discharged later catches up with the water discharged is larger than that of the second water discharge. The second water discharge is performed after the first water discharged from the water discharge hole to the water landing position so that the second water discharge is faster than the first water discharge at the water landing position. The initial speed at the time of water discharge is configured to be faster than that of the first water discharge so that the follow-up amount of the wash water discharged from the second water discharge is less than that of the first water discharge.

  Further, the water discharging means discharges water so that an initial speed of the second water discharge is faster than an initial speed of the first water discharge. In addition, water discharge is performed such that the increase rate of the initial speed of the second water discharge is smaller than the increase rate of the initial speed of the first water discharge. Accordingly, it is possible to suppress the speed of the cleaning water discharged later from being excessively high with respect to the cleaning water discharged earlier.

  Further, the water discharge means includes a first pressurization step and a second pressurization step configured to discharge water different from the first pressurization step, and the first water discharge includes The first pressurizing step is pressurized so as to have a larger water discharge cross-sectional area than the second water discharge at the water landing position, and the second water discharge is performed by the second pressurizing step. It is comprised so that it may be pressurized so that it may become a speed faster than said 1st water discharge in a water landing position.

  According to this, in order to perform two different water discharge, it has two pressurization processes, and it is constituted so that water discharge optimized in each process is performed. Therefore, the first water discharge having a large water discharge cross-sectional area and the second water discharge having a high speed can be generated efficiently and reliably.

  The “first pressurizing step” and the “second pressurizing step” correspond to the following in the embodiment described above. For example, in the first embodiment, the pressurization period from P1 to P2 in the pressure waveform of FIG. 3 corresponds to the “first pressurization process”, and the pressurization period from P3 to P4 is This corresponds to the “second pressurizing step”. In the eighth embodiment, the pressurization period from P21 to P22 in the pressure waveform of FIG. 24 corresponds to the “first pressurization process”, and the pressurization period from P23 to P24 is This corresponds to the “second pressurizing step”.

  In performing the first pressurizing step and the second pressurizing step, the water discharging means may operate one pressurizing unit as in the fifth and seventh embodiments. As in the fourth and sixth embodiments, the first pressurizing unit that performs the first pressurizing step and the second pressurizing unit that performs the second pressurizing step may be provided and operated. .

  And the 2nd pressurization part is very simple composition which changes the pressurization amount by a pressurization part by setting the pressurization quantity so that the initial speed of discharged water may become quicker than the 1st pressurization part. It becomes possible to change the speed of the washing water discharged.

  In addition, the flow path downstream of the second pressurizing unit is downstream of the first pressurizing unit so that the initial speed of water discharged by the second pressurizing unit is faster than the initial speed of water discharged by the first pressurizing unit. It is smaller than the flow path. For example, it is possible to change the speed of the water to be discharged by a very simple configuration in which the diameter of the flow path itself downstream of the pressurizing unit is changed or an orifice is inserted.

  Further, the second pressurizing unit has an accumulated pressure downstream of the second pressurizing unit that is lower than the accumulated pressure downstream of the first pressurizing unit so that the initial speed of water discharge is faster than that of the first pressurizing unit. Is also getting smaller. For example, the pressure of the wash water discharged is changed by a very simple configuration in which the pressure accumulation amount is set so that the pressure accumulation amount is changed by inserting a pressure accumulator or by inserting a rubber tube or the like. be able to.

  In addition, the first flow path opening / closing unit for accumulating the cleaning water pressurized by the first pressurizing unit in the first pressurizing unit, and the cleaning water pressurized by the second pressurizing unit A second flow path opening / closing part that accumulates pressure in the second pressurization part, and the second flow path opening / closing part sets the time for accumulating pressure in the first pressure application part by the first flow path opening / closing part. The first water discharge and the second water discharge can be performed longer than the time during which pressure is accumulated in the second pressure unit.

Moreover, in this water discharging apparatus, a flow path opening / closing section (for example, the umbrella packing described above) for accumulating the washing water pressurized by the pressurizing section in the pressurizing section is provided, and the time during which pressure is accumulated by the flow path opening / closing section. Are supposed to be different. Then, by changing the time accumulated in the flow path opening / closing section, the speed of the wash water discharged is changed, and the wash water having a high flow rate by the first water discharge and the wash water having a high speed by the second water discharge And so on.
In this way, even with a low flow rate, it is possible to generate wash water with a high flow rate due to the first water discharge and wash water with a high speed due to the second water discharge. Therefore, even with a smaller amount of washing water, it is possible to obtain a high washing performance that achieves both the ability to wash away dirt and the ability to remove dirt. In addition, water discharge that is highly effective even at such a low flow rate can be realized with a simple configuration in which the time accumulated by the flow path opening / closing sections provided in the two pressurizing sections is different. .
It should be noted that the time accumulated by the flow path opening / closing section (for example, the umbrella packing described above) can be selected by appropriately selecting the spring constant of the material, or by appropriately changing the dimensions such as the thickness of the portion that opens and closes the flow path. Can be changed.

  The embodiment of the present invention has been illustrated above.

  According to the present invention, it is possible to realize a force for washing away dirt that has been washed with a large amount of water in a limited amount of water, and to achieve a force for removing dirt. Therefore, a highly comfortable water discharge device can be realized.

In addition, although it was made to produce | generate the water discharge group from which the water discharge cross-sectional area differs relatively by controlling the amount of follow-up of wash water, from the 1st water discharge with a large flow rate from the start time of water discharge, and 1st water discharge It is also possible to perform the second water discharge with a high speed.
In the embodiment described above, water is discharged from one water discharge hole (for example, “wet cleaning”, “bide cleaning”, etc.) provided for each application. Spout for generating a large (large flow rate, slow flow rate) ”and“ small spout group (small discharge rate (low flow rate), fast flow rate) ” It is also possible to provide a water discharge hole. Moreover, the water discharge hole for performing the 1st water discharge with much flow volume mentioned above, and the water discharge hole for performing the 2nd water discharge whose speed is faster than the 1st water discharge can also be provided.

Then, the case where the water discharging apparatus of this invention is applied to a shower apparatus is demonstrated.
FIG. 35 is a schematic configuration diagram for illustrating a configuration in which the water discharging device is applied to a shower device.
As shown in FIG. 35, the shower apparatus 600 includes a shower head 670, a hose part 660, a pressure fluctuation part 650, a flow control water part 640, a temperature adjustment part 630, a control device 620, and an operation part 610. And comprising. The control device 620 controls the operation of the pressure fluctuation unit 650, the flow control water unit 640, and the temperature adjustment unit 630, and the control device 620 is activated by an operation on the operation unit 610.

  The temperature of the water supplied from the water supply source is adjusted by the temperature adjustment unit 630, and the hot water is supplied to the pressure fluctuation unit 650 through the water supply pipe. When the pressure fluctuation unit 650 is activated by the control device 620, a pulsation transition occurs in the supplied hot water. The pulsation generated by the pressure fluctuation unit 650 is discharged toward the human body through the shower head 670. At this time, due to the pulsation generated by the pressure fluctuation unit 650, water discharge having a large cross-sectional area and water discharge having a high speed are alternately discharged from each water spray hole of the shower head 670. And it becomes easy to remove dirt by water discharge with high speed, and bubbles, such as dirt, a shampoo, and soap, can be washed away by water discharge with a big cross-sectional area, ie, water discharge with much quantity of water. At this time, by alternately and independently applying each of them at a high speed, it is possible to realize cleaning with both performances improved. The shower comfort is also expressed by a sense of stimulation and a feeling of volume, and a feeling of stimulation can be felt by water discharge at a high speed, and a feeling of volume can be felt by water discharge having a large cross-sectional area. In this way, it is possible to feel both a sense of stimulation and a sense of volume, and it is possible to realize a shower with a very high comfort. In addition, the sense of stimulation here can be said to be a sensation of removing dirt, and is a sensation close to the sensation of removing dirt by the stimulus (strength). On the other hand, the sense of volume can be referred to as a sense of flowing dirt, or a sense of washing away dirt and bubbles at a large flow rate. In other words, by using this technology, the shower comfort and cleaning performance with a small amount of water can increase the flow velocity V and the water discharge cross-sectional area S (weight M), realizing high comfort and high cleaning performance. can do.

  In addition, although embodiment so far illustrated the washing | cleaning apparatus which discharges water to a human body, this water discharge apparatus can also be applied other than a human body. For example, it may be used to improve the cleaning performance of dishes such as a dishwasher. In this case, the performance of removing stubborn dirt and the like can be improved by the water discharge group having a high speed, and the washing performance of dirt and detergent can be improved by the water discharge group having a large water discharge cross-sectional area S (weight M). And it can implement | achieve the washing | cleaning which made dirt removal performance and washing-off performance compatible at a high level by discharging each water discharge group alternately with a short period.

Moreover, you may apply this water discharging apparatus to a washing machine. In this case, in addition to a normal washing process such as rotation, washing with a water discharging device can enhance the dirt removing ability. Further, by alternately discharging the high water discharge group and the water discharge having a large cross-sectional area, it is possible to realize cleaning that achieves both a high level of dirt removal performance and a high dirt discharge performance.
It should be noted that the present invention can be applied as appropriate for other uses.

  DESCRIPTION OF SYMBOLS 1 Water discharging apparatus, 1a Water discharging apparatus, 10 Control part, 50 Water-inlet side valve unit, 60 Heat exchange unit, 70 Pulsation unit, 90 Pulsation generating part (water discharging means), 90a-90f Pulsation generating part (water discharging means), 91 1st Pulsation generating part (water discharging means), 91a to 91c first pulsation generating part (water discharging means), 92 second pulsation generating part (water discharging means), 92a to 92c second pulsation generating part (water discharging means), 75a Pressure accumulating unit, 80 nozzle unit, 82 nozzle, 86a Pressure accumulating unit, 107 air supply unit, 107a tube, 107b tube, 401 water discharging hole, 402 water discharging hole, 600 shower device, 610 operation unit, 620 control device, 630 temperature adjusting unit, 640 Flow control water part, 650 Pressure fluctuation part, 660 Hose part, 670 Shower head

Claims (10)

Water discharge means for discharging water;
A nozzle provided downstream of the water discharge means, and provided with water discharge holes for discharging the water;
In a water discharge device comprising:
The water discharge means performs a first water discharge and a second water discharge,
The first water discharge is configured such that water discharged from the water discharge hole is not expanded in a conical shape when water is discharged from the nozzle, and is larger than the second water discharge after water discharge. Configured to have a cross-sectional area,
The second water discharge is configured such that water discharged from the water discharge hole is not expanded in a conical shape when water is discharged from the nozzle, and is faster than the first water discharge after water discharge. Configured to be
Further, the water discharging means is configured to discharge the first water discharge and the second water discharge at different timings.   The water discharge device according to claim 1, wherein the first water discharge and the second water discharge are alternately discharged from the same water discharge hole so as to overlap at a predetermined position determined in advance.   The water discharge means discharges water first from the water discharge hole to the predetermined position so that the first water discharge has a larger water discharge cross-sectional area than the second water discharge at a predetermined position determined in advance. The initial velocity at the time when the first water discharge starts is the second water discharge so that the amount of catch-up that the water discharged later catches up with the first water is larger than that of the second water discharge. Is configured so that the initial speed at the time when the first water discharge ends is slower than the initial speed at the time when the second water discharge ends, the second water discharge The amount of catch-up that the water discharged later catches up with the water discharged earlier from the water discharge hole to the predetermined position so as to be faster than the first water discharge at the predetermined position. So that the second water discharge is less than the water discharge The initial speed at the time when the second water discharge starts is faster than the initial speed at the time when the first water discharge starts, and the initial speed at the time when the second water discharge ends is the time when the second water discharge ends. The water discharge device according to claim 1, wherein the water discharge device is configured to be faster than the initial speed.   4. The water discharge device according to claim 3, wherein the water discharge means is configured to discharge the second water discharge so that the rate of change in initial speed is smaller than that of the first water discharge. The water discharge means performs water discharge by pressurization, and includes a first pressurization step and a second pressurization step configured to discharge water different from the first pressurization step. Prepared,
The first water discharge is pressurized so as to have a water discharge cross-sectional area larger than the second water discharge at a predetermined position determined in advance by the first pressurization step,
The said 2nd water discharge is comprised so that it may be pressurized so that it may become a speed quicker than a said 1st water discharge in the said predetermined position by the said 2nd pressurization process. The water discharging apparatus according to 1.   The water discharging means discharges water by pressurization, and includes a first pressurizing unit that performs the first pressurizing step and a second pressurizing unit that performs the second pressurizing step. The water discharging apparatus according to claim 5, wherein   The water discharge apparatus according to claim 6, wherein the second pressurizing unit has a pressurization amount set so that an initial speed of water discharge is faster than that of the first pressurizing unit.   In the second pressurizing unit, the flow path downstream of the second pressurizing unit is higher than the flow path downstream of the first pressurizing unit so that the initial speed of water discharge is faster than that of the first pressurizing unit. The water discharge device according to claim 6, wherein the water discharge device is configured to be small.   The second pressurization unit has a pressure accumulation amount downstream of the second pressurization unit that is lower than a pressure accumulation amount downstream of the first pressurization unit so that the initial speed of water discharge is faster than that of the first pressurization unit. The water discharge device according to claim 6, wherein the water discharge device is configured to be small.   The water discharging device according to claim 1, wherein the water discharging means includes air mixing means for mixing air into the water.

Images