JP3516702B2 - Rotary nozzle device and design method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary nozzle device for ejecting fluid while rotating.

[0002]

2. Description of the Related Art As one of applications of a rotary nozzle device,
Dishwashers are known.

Here, a conventional technology of a rotary nozzle device will be described by taking a dishwasher as an example. FIG. 14 shows a conventional dishwasher. 101 is a dishwasher body, 102 is a lid for putting dishes in the dishwasher, 103 is a water supply hose for taking water into the dishwasher, 104 is a water supply hose 103
Nozzle drive pump for pressurizing water from and rotating the nozzle and jetting water, 105 is a rotating nozzle, 106 is a drainage pump for draining water accumulated inside, 107 is drainage drained to the outside of the dishwasher A drain hose 108 is a control circuit that controls the operation timing of the nozzle drive pump 104 and the drain pump 106. In the conventional dishwasher configured as described above, the water supplied from the water supply hose 103 is pressurized by the nozzle drive pump 104 and supplied to the rotary nozzle 105.

A conventional example of the rotary nozzle 105 is shown in FIG.
FIG. 15 is a view of the rotary nozzle 105 seen from above, which has four water injection ports (A, B, C, D). The jet direction of water at each jet port is set so that A is horizontal to the plane of rotation of the nozzle and B, C, and D are vertical to the plane of rotation of the nozzle. The nozzle rotates due to the reaction of the water jet from the jet A, and the dishes are washed by the jet of water from the other jets (B, C, D). Therefore, the nozzle can spray water on the dishes while rotating.

The water on the tableware is drained by a drainage pump 10.
After being collected in 6 and pressurized, it is discharged to the outside through the drain hose 107. Further, the nozzle drive pump 104 and the drainage pump 106 are controlled by the control circuit 108, and are controlled at appropriate operation timings according to the washing process such as washing, pool rinsing, and rinsing of dishes.

[0006]

The above-mentioned rotary nozzle 10
FIG. 16 shows the rotation locus of the injection port of No. 5. As can be seen from FIG. 16, the nozzle makes only a simple rotation, and the trajectory of the injection port becomes a perfect circle. Therefore, the rotating nozzle 105
Since the water sprayed from the tabletop only covers a limited area of the tableware, there were problems such as not being able to obtain a sufficient cleaning effect depending on the arrangement of the tableware, or the water not reaching the gaps between the tableware. .

In view of the above points, the present invention provides a rotary nozzle device which can drive a rotary nozzle by using a chaos technique and thereby spray water uniformly on a target.

[0008]

[Means for Solving the Problems] A nozzle composed of a pump for pressurizing a fluid and a plurality of rotatable hollow links that are in communication with each other. The hollow link has at least one fluid injection port and is added by the pump. In the rotary nozzle device that ejects fluid from the ejection port while rotating the hollow link by the force of the pressurized fluid, the link shape, weight, center of gravity position, fluid ejection angle of the ejection port, pressurization pattern of the pump, etc. By adjusting, the movement of the nozzle becomes chaotic.

[0009]

[Operation] Since chaos has the characteristic of orbital instability,
A nozzle in a chaotic state does not follow the same trajectory as twice. Therefore, the chaotic nozzle can spray water more uniformly than the conventional nozzle.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) is a block diagram of a rotary nozzle device according to a first embodiment of the present invention. 1 is a nozzle drive pump that pressurizes the supplied water, 2 is a nozzle drive pump 1
It is rotated by the force of the water pressurized by and sprays water 2
It is a link rotating nozzle.

A detailed configuration of the 2-link rotary nozzle 2 is shown in FIG.
Shown in (b). The upper part of FIG. 1 (b) is a top view of the 2-link rotary nozzle 2, and the lower part is a side view. As shown in Fig. 1 (b), the two-link rotary nozzle 2 has two links (first link 2-1 and second link 2-2).
It consists of Each link has a plurality of injection ports, which are represented by symbols A to F in FIG. 1 (b). The direction in which water is ejected from each jet is different for each jet.

Each link and the connecting portion of the link are hollow,
The water supplied to the water intake under the first link can reach the injection ports of the first and second links through the inside of the hollow link. The two links in the figure are center 0
It is connected at 2, and the second link 2-2 has a structure that can freely rotate at the center 02. The water intake of the first link is connected to the target device, but the first link 2-1 can freely rotate at the center 01.

The operation of the rotary nozzle device thus constructed will be described below. First, water is pressurized by the nozzle drive pump 1 and supplied to the water intake of the 2-link rotary nozzle 2. The supplied water passes through the insides of the first link and the second link and is jetted from the jet ports A to F. The direction of water injection from each injection port is B, C, D, and E above the plane of rotation of the nozzle.
A and F are horizontal.

In FIG. 1 (b), the injection directions of water at each injection port are indicated by arrows. The jets B, C, D, E blow water in a direction perpendicular to the plane of rotation of the nozzle, and therefore cannot generate a force for rotating the nozzle. However, injection ports A and F
Since the water is blown out in parallel with the rotating plane of the nozzle, the nozzle can be rotated by the reaction of the blown water.

In this way, by tilting the directions of the water jets from several jet outlets to the direction in which the link can rotate, a rotational force can be applied to the link, and the nozzle can jet water while rotating. You can

Also in the conventional rotary nozzle device shown in FIG. 15, water is sprayed in parallel to the rotation plane of the link, so that water is sprayed while rotating. However, in the conventional rotary nozzle device, the trajectory of the injection port is a simple circle because there is only one link.

On the other hand, in the case of this embodiment, since the nozzle is composed of two links, the rotation trajectory of the injection port on the second link becomes more complicated than the conventional circular trajectory.

FIG. 2A shows a simulation result of the rotation locus of the injection port D in the conventional rotary nozzle device of FIG. 15, and shows the rotation locus of the injection port C on the second link 2-2 of the two-link rotary nozzle 2. The simulation result of is shown in Fig. 2 (b). However, Fig. 2 (b) shows the rotation speed of the first link 2-1 and the second link 2-2.
These are the calculation results when the rotation speed ratio of is set to 2: 5.

From FIG. 2, it can be seen that the injection port of the conventional rotary nozzle device moves on one circumference, whereas the nozzle moves more complicatedly in this embodiment. However, in the case of FIG. 2 (b) as well, the rotation is periodic, and no matter how much time elapses, the injection port does not pass through a path other than that shown in FIG. 2 (b).

However, the two-link rotary nozzle 2 can be driven with a complexity as shown in FIG. 2 (b) by changing the design of the link and the injection port.

A chaotic state is known as a state in which the locus becomes more complicated. Here, chaos means deterministic chaos, and shows a state of extremely unstable and random movement, even though a complete equation of motion is described.

The motion of a device having a plurality of links, such as the two-link rotary nozzle 2, can be changed to a chaotic state. For example, a manipulator with two or more links or a double pendulum can be changed to a chaotic state. It is known that you can do it (see Baifukan Chaos Introduced by Nagashima and Baba).

The chaotic state has a feature of orbital instability and never passes through the same orbit twice. Therefore, by making the 2-link rotary nozzle in a chaotic state, water can be sprayed more uniformly.

As an index indicating the chaotic state,
There are chaotic features such as fractal dimension and Lyapunov number. The two-link rotary nozzle can be put into a chaotic state by changing the jet direction of the water at the jet port, the center of gravity of the link, the shape, and the weight so that these values become appropriate values.

Here, as an example, a method of determining the blowing direction of water from the injection port, the shape of the link, and the position of the center of gravity by using the maximum Lyapunov number will be shown.

The Lyapunov number is a numerical value showing how sensitive the locus is to the initial value. Especially, when the maximum value of the Lyapunov number takes a positive value, the data has a chaotic behavior. It is known. Several concrete methods for calculating the Lyapunov number have already been proposed by academic societies. Here, the maximum Lyapunov exponent of data is calculated by the method proposed by Sato et al. (Nagashima, Nagai, Ogihara, Tsuchiya: Time series data and chaos, Measurement and control, Vol. 29, No. 9, pp. 53- -60, 1990).

Now, as shown in FIG. 3, an angle sensor is attached to the two-link rotary nozzle 2 so that the respective rotary angles of the first link and the second link can be detected. The position of the tip of the second link can be calculated from the detected rotation angle, and the position can be calculated as (x
(i), y (i)). However, i represents time. Next, from the nozzle tip position x (i), the time series vector X (i) = (x
(i), x (i + T), x (i + 2T), ...., x (i + (d-1) × T)} are created and the attractor is constructed. Here, d is the dimension of the time series vector, and T is the time delay amount. Set d and T to appropriate values. At this time, an appropriate hyperplane is selected in the d-dimensional space, and the vector X (i) -X (i + 1) that crosses this hyperplane is obtained. Find the coordinates of the intersection on the hyperplane as the interior division point of X (i) and X (i + 1). Set of points on the plane {Xp1, Xp2, ..., Xp
make k, ....}. In this set, select all pairs whose distance is less than or equal to a predetermined threshold value E, and select 2 points among them as Xp.
Expressed as k, Xpk '. At this time, the maximum Lyapunov exponent L can be calculated by the following equation.

[0028]

[Equation 1]

However, Np indicates the total number of data pairs whose distance is equal to or less than the threshold value E. It is known that L (tau) converges when the value of tau is increased in (Equation 1). L (tau) at the time of convergence is the maximum Lyapunov exponent. Other methods for calculating the maximum Lyapunov number have been proposed. (TSParker, LOChua: PracticalNumerical Al
gorithm for Chaotic System, Springer-Verlag, 1989
Even if the calculation is performed using another method, the same effect as that of the present embodiment can be obtained.

The maximum Lyapunov number is 0 by repeating the calculation for obtaining such a maximum Lyapunov index while changing the angle of the injection port on the second nozzle and the center of gravity of the link.
You can find a time that takes a positive value that is not.

According to the design of the injection port and the link when the maximum Lyapunov number becomes positive, the nozzle can be driven in a chaotic state.

FIG. 4 shows the locus of the injection port C of the two-link rotary nozzle when the chaotic state is reached. Fig. 4 shows the trajectory of the injection port D on the second link when the actual machine of the two-link rotary nozzle 2 is in a chaotic state, not obtained by numerical calculation.

As is apparent from FIG. 4, the area through which the nozzle passes is larger than that in FIGS. 2A and 2B, and it can be seen that water can be sprinkled evenly.

The angle sensor as shown in FIG. 3 is attached only at the nozzle designing stage, and it is not necessary for the product to be shipped and during the normal operation, and the rotary nozzle device has the structure as shown in FIG.

As described above, according to this embodiment,
By using a multi-link nozzle and appropriately setting the direction of water jet from the nozzle and the position, weight, and shape of the center of gravity of the link, the nozzle operation can be made chaotic. The chaotic nozzle has an unstable orbit, and the same state orbit cannot be passed twice. Therefore, it is possible to spray water evenly. In addition, the nozzle can be set to an appropriate chaos state by examining chaos features such as the Lyapunov number.

In this embodiment, the jetting angle of water at the jet outlet, the position of the center of gravity of the link, and the weight are used as the parameters of the nozzle to be changed. Therefore, as shown in Fig. 5, (a) the center of gravity of the second link is changed, (b) the weight of one side of the second link is changed to change the center of gravity, and (c) there is more than two links. The same effect can be obtained by using a link, or (d) one in which the amount of play at the connection between the first link and the second link is increased so that the center of rotation and center of gravity of the link change with the flow of water. Is obtained.

In this embodiment, the maximum Lyapunov number is used as the method for discriminating the chaotic state, but other feature quantities such as fractal dimension and Lyapunov dimension may be used. In particular, the fractal dimension is an excellent method for discriminating chaotic states. The fractal dimension shows the self-similarity of the obtained data, and if it is chaotic, it has a non-integer dimension. Several information dimensions, capacity dimensions, correlation dimensions, etc. have been proposed as fractal dimensions. Among these dimensions, the correlation dimension is often used because of its ease of calculation.

Correlation dimension means Grassberger and Procaccia
Was proposed in 1983, and the correlation integral (Correlation In
tegral). The correlation integral C (r) is calculated by the following equation.

[0039]

[Equation 2]

However, X (i) is the time series vector defined above, and H represents the step function. N is the total number of time series vectors.

When the correlation integral C (r) has the following relationship, D is called a correlation dimension.

[0042]

[Equation 3]

To obtain the correlation dimension, first, log C
Multiply (r) and r by the method of least squares to obtain the proportionality constant D.
The obtained D converges as the number of dimensions d increases. D when it converges sufficiently is the final calculation result of the correlation dimension. Therefore, 2 link rotary nozzle 2
It is possible to find the time when the correlation dimension takes an appropriate value (non-integer) by repeating the calculation of the correlation dimension while changing the jetting angle of the water at the injection port, the position of the center of gravity of the link, etc. it can. If the 2-link rotary nozzle 2 is set in this situation, chaotic driving can be performed.

As described above, for the fractal dimension, various dimensions and calculation methods such as the capacity dimension and the information dimension have been proposed in addition to the correlation dimension. Even if it is obtained by using another method, it is possible to obtain the uniform water spraying ability, which is the same effect as that of this embodiment.

FIG. 6 is a block diagram of the rotary nozzle device according to the second embodiment of the present invention. 1 is a nozzle drive pump that pressurizes the supplied water, 2 is a nozzle drive pump 1
It is rotated by the force of the water pressurized by and sprays water 2
These are link rotary nozzles, and these have the same configuration as in the first embodiment. The difference from the first embodiment is that a pressure control circuit 10 for controlling the pressure of the nozzle drive pump 1 is provided. The operation of the rotary nozzle device thus configured will be described below.

In the first embodiment, it has been explained that the two-link rotary nozzle will be in a chaotic state if the design of the jet angle of water at the jet port, the center of gravity of the link, etc. is properly performed. The chaotic nozzle has an orbital instability, so the orbit changes continuously.
Does not follow the same trajectory as degrees. Therefore, it is possible to spray water more uniformly as compared with a nozzle that is periodically moving.

However, in the first embodiment, in order to bring the nozzle into the chaotic state, it is necessary to perform the above-described calculation of the chaotic feature quantity and an experiment by trial and error.

It is known that the chaotic state is more likely to occur as the degree of freedom of the target system increases. In the present embodiment, as a nozzle that can more easily realize a chaotic state, a rotary nozzle device in which the pressure of the nozzle drive pump 1 is changed by the pressure control circuit 3 to increase the degree of freedom of the system will be described.

When the output of the nozzle drive pump 1 is changed by the pressure control circuit 10 as shown in FIG. 7, the degree of freedom of the rotary nozzle device as a whole is increased, and the nozzle easily transitions to the chaotic state. In Fig. 7, the horizontal axis represents time and the vertical axis represents the pressure applied by the nozzle drive pump 1, and the three types (a), (b), (c) are shown.
The example of the change pattern of the pressing force is shown. Figure 7 (a) shows O
Repetition of N and OFF, (b) shows a trigonometric change, and (c) shows a sawtooth-like change.

The two-link rotary nozzle transits to the chaotic state regardless of which of the pressure patterns is used. In this way, the nozzle drive pump 1
The nozzle can be transitioned to the chaotic state by changing the pressure applied to the nozzle with respect to time.

As described above, according to this embodiment,
The pressure of the nozzle drive pump 1 that pressurizes the water supplied to the nozzle using the 2-link rotary nozzle, and the pressure control circuit 1
By changing the value by 0, the behavior of the nozzle can be made chaotic. The chaotic nozzle has an unstable orbit, and the same state orbit cannot be passed twice. Therefore, it is possible to spray water evenly. Also,
Combined with the method shown in the first embodiment, the pressurization pattern of the nozzle drive pump 1 is changed, the jetting direction of the water at the injection port, the center of gravity of the link, etc. are investigated while examining the chaotic feature amount such as the Lyapunov number. The nozzle can also be set to an appropriate chaos state by changing it. In this case, features such as the Lyapunov number are detected, so that the degree of chaos can be set appropriately, and when applied to a dishwasher or the like, a further effect is produced in terms of washing speed and the like.

Although an example of the pressurizing pattern of the pressurizing force control circuit 10 is shown in FIG. 7, a pattern other than that shown in FIG. 7 may be used. In particular, a pressure pattern generated by a function that directly outputs a chaotic signal may be used. As an example of this, an example of a pressure pattern using a logistic function well known as a chaotic signal is shown.

Now, assuming that time is t, the nozzle drive pump 1
Let p be the pressure of P and the maximum pressure of the pump be P, and the following function can be considered as the pressure pattern.

[0054]

[Equation 4]

In this case, the calculation result of the logistic function is used as the pressing force as it is. When the pressing force of the nozzle drive pump 1 is controlled by using this (Equation 4), the nozzle behavior becomes chaotic. It should be noted that the same effect as that of the present embodiment can be obtained by controlling the pressure applied to the nozzle drive pump 1 by using a function other than the logistic function, such as a tent function or intermittent chaos, which outputs a chaotic signal.

FIG. 8 is a block diagram of a rotary nozzle device according to the third embodiment of the present invention. In the figure, 1 is a nozzle drive pump for pressurizing the supplied water, which has the same structure as that of the first embodiment. The difference from the first embodiment is that the 2-link rotary nozzle 2 is changed to a water flow suppressing 2-link rotary nozzle 20. The operation of the rotary nozzle device thus configured will be described below.

The chaotic state is likely to occur as the degree of freedom of the target system increases. In the third embodiment, by changing the output of the nozzle drive pump 1, the degree of freedom of the entire nozzle drive device is increased and a chaotic state is created.
In addition to this method, as a method to increase the degree of freedom of the system,
There is a method of changing the structure of the connection part of each link.

In this embodiment, an example in which the structure of the connecting portion of the link is changed and the rotary nozzle device is brought into a chaotic state will be described.

The structure of the connecting portion of the link of the rotary nozzle device shown in the first embodiment is as shown in FIG.

FIG. 9 (1) shows the structure of the connecting portion between the first link 2-1 and the second link 2-2 of the two-link rotary nozzle 2.
Normally, the second link 2-2 is fitted onto the connection part surrounded by a circle, and the second link 2-2 is fixed with a nut so that the second link 2-2 does not separate from the first link. However, the second link 2-2 can rotate freely.

9 (a) and 9 (b) are enlarged views of the circled portion (connection portion) of the first link 2-1 of FIG. 9 (1). ) Is a side view and (b) is a top view. In the connection part shown in Fig. 9, a large hole is formed in the connection part so that water can smoothly flow from the first link to the second link.
There are four, and water can be guided from the first link to the second link with less resistance.

On the other hand, the fourth embodiment has a water flow suppressing type two-link rotary nozzle 20 having a connecting portion having a structure as shown in FIG. As is clear from FIG. 10, this water flow suppressing type two-link rotary nozzle 20 has a smaller number of holes in the connecting portion as compared with the first embodiment, and the water flow in the connecting portion is limited to almost one direction. To be done.

In the structure of the connecting portion as shown in FIG. 9, since the total area of the holes is large, the resistance value of water at the connecting portion is almost whatever the angle formed by the first link and the second link is. It does not change. However, in this water flow control type two-link rotary nozzle 20, as shown in FIG. 10, the flow of water at the connecting portion is limited to almost one direction, so that the jet force of water is dependent on the position of each link. It will change.

In the water flow restrained two-link rotary nozzle,
FIG. 11 shows changes in the jet force of water depending on the relative position of each link.
Will be explained.

FIG. 11 (a) shows the case where the second link 20-2 is located in substantially the same direction as the first link 20-1. The flow of water to the jet F in this case is as shown by the dotted line in the figure. First
Since the connection portion of the link has the structure shown in FIG. 10, there is little resistance to the flow of water to the injection port F, and the water is vigorously injected from the injection port F.

In the case of FIG. 12B, the second link 20-2 and the first link 20-2
This is when the angle formed by the link 20-1 is about 90 degrees. In this case, the water flow to the injection port F bends as shown by the dotted line. In this case, since the connecting portion of the first link has the structure as shown in FIG. 10, there is a portion where the water flow is bent more than necessary. In this bent portion, the water passage is narrower than in the case of (a), and the resistance to water flow increases. Therefore, as a result, the momentum of the water injected from the injection port F decreases, and conversely, the momentum of the water from the injection port of the first link, which makes it relatively easy for water to pass, increases.

As described above, by using the water flow suppressing type two-link rotary nozzle 20 in which the structure of the connecting portion is changed, the jetting power of water from each jetting port changes according to the relative position of the link. Therefore, the degree of freedom in the behavior of the nozzle is increased as compared with the first embodiment, and the transition to the chaotic state is facilitated.

As described above, according to this embodiment,
By using a multi-link nozzle and partially suppressing the water flow that flows in the nozzle or in the connection part, the momentum of water emitted from the injection port can be changed according to the positional relationship of each link. This increases the degree of freedom of the entire nozzle driving device, and the behavior of the nozzle can be made chaotic. The chaotic nozzle has an unstable orbit, and the same state orbit cannot be passed twice. Therefore, it is possible to spray water evenly.

Further, by combining with the method shown in the first embodiment, the design of the connecting portion can be changed, the jetting direction of water at the jet port, and the barycentric position of the link can be examined while checking the chaos characteristic amount such as the Lyapunov number. It is also possible to set the nozzle to an appropriate chaos state by changing the above. In this case, since the feature amount such as the Lyapunov number is detected, the degree of chaos can be appropriately set, and further effects can be obtained in terms of the cleaning speed.

FIG. 12 is a block diagram of the rotary nozzle device according to the fourth embodiment of the present invention. 1 is a nozzle drive pump that pressurizes the supplied water, 2 is a 2-link rotary nozzle that rotates by the force of the water pressurized by the nozzle drive pump 1 and injects water, 10 is the amount of pressurization of the nozzle drive pump The pressure control circuit has the same configuration as that of the third embodiment.

The difference from the third embodiment is that the sensor 30 for detecting the movement of the two-link rotary nozzle and the chaos characteristic amount calculation for calculating the chaos characteristic amount from the observation amount relating to the nozzle movement detected by the sensor 30. It is a point equipped with a circuit.
The operation of the rotary nozzle device thus configured will be described below.

In the first to third embodiments, the nozzle driving device which operates in the chaotic state has been described. In a dishwasher, etc., it is desirable to operate the nozzle in a chaotic state at all times, because it is required to spray water evenly.

However, in the case where the disturbance is applied to the nozzle and the dynamic characteristics of the system change, the first to third embodiments
With the method described in the above embodiment, the chaotic state cannot always be maintained. In order to prevent this, the present embodiment provides a device that can detect the movement of the nozzle in real time and can always perform stable chaos drive.

The sensor 30 detects the movement of the nozzle, and may be a plurality of angle sensors as shown in FIG. 3 or may be one using an image processing technique such as a video camera. Here, the invention will be described with an example using the angle sensor of FIG.

The angle of each link detected by the sensor 30 is input to the chaotic feature amount calculation circuit 31, and the maximum Lyapunov number, which is one of the chaotic feature amounts described in the first embodiment, is calculated. The method of calculating the maximum Lyapunov number in the chaotic feature amount calculation circuit 31 may be the method described in the first embodiment, or may be another method proposed by academic societies.

A positive maximum Lyapunov number indicates that the nozzle is in a chaotic state, while a zero indicates a periodic or quasi-periodic operation.

Therefore, the chaotic feature quantity calculation circuit 31
From the calculated maximum Lyapunov number, the maximum Lyapunov number is 0
If it is near or negative, it sends a command to the pressurizing force control circuit 10 to change the pressurizing pattern, and if the maximum Lyapunov number is a positive value not near 0, it signals the pressurizing force control circuit 10 to drive as it is. To send.

The pressurizing force control circuit 10 changes the pressurizing pattern in accordance with the signal from the chaotic feature amount calculating circuit 31.
When the pressure is applied in the pattern shown in FIG. 8 (a), the on time Ton and the off time Toff in FIG. 8 (a) are changed, and the pressure is applied in the pattern shown in FIG. 8 (b). If so, change the cycle of the sine curve.

As described above, according to this embodiment,
By observing the movement of the nozzle with the sensor and detecting the chaotic feature from the observation result, the driving state of the nozzle can be known. Further, by using the information for controlling the pressing force, the nozzle can be always driven in the optimum chaotic state. The chaotic nozzle has an unstable orbit, and has the property of never going through the same state orbit twice. Therefore, by maintaining a chaotic state at all times, it is possible to spray water evenly.

In the present invention, the addition of the sensor 30 makes it possible to detect a periodic or quasi-periodic operation which is not in a chaotic state. Therefore, not only can the chaotic state be maintained, but it is also possible to switch between the chaotic state and the periodic state according to the purpose of use and the state of use of the nozzle. In this embodiment, the chaotic feature amount calculation circuit 31 is described to calculate the maximum Lyapunov number.
Similar effects can be obtained by using other chaotic features such as fractal dimension such as correlation dimension, capacity dimension and information dimension, and Lyapunov dimension.

As a fifth embodiment of the present invention, an example in which the rotary nozzle device is applied to a dishwasher will be described. FIG. 13 is a diagram showing the configuration of the dishwasher in this embodiment.
Is a dishwasher body, 102 is a lid, 103 is a water supply hose for taking water into the dishwasher, 104 is a water supply hose 1
Nozzle drive pump for pressurizing water from 03 to rotate the nozzle and jet water, 106 is a drain pump for draining water on the dishes, 107 is a drain hose for guiding the drain to the outside of the dishwasher, 108 Is a control circuit for controlling the nozzle drive pump 104 and the drainage pump 106. The above is FIG.
This is a part common to the conventional example of. The difference from the conventional example is 1
2 described in the first embodiment instead of the rotary nozzle of the link
The point is that the link rotating nozzle 2 is used.

As described in the first embodiment, the two-link rotary nozzle can be brought into a chaotic state. By using the 2-link rotary nozzle 2 in the chaotic state, the nozzle moves along the locus as shown in FIG. 4, and water can be sprayed on the tableware in various directions than the movement locus of the conventional example of FIG.
Water can be sprayed evenly.

Therefore, in the dishwasher using the two-link rotary nozzle, water can be sprayed to every corner of the tableware and the stains on the tableware can be sufficiently removed, as compared with the conventional example. Further, in the conventional example, since the locus of the nozzle has a constant circumference, in order to remove dirt, it was necessary to sufficiently consider how to place the dishes, but in this example, the locus of the nozzle constantly changes. Therefore, a sufficient cleaning effect can be obtained without any special arrangement of tableware.

As described above, by using the rotary nozzle composed of a plurality of links in a chaotic state, water can be sprayed evenly on the dishes more uniformly than before, and the washing efficiency of the dishwasher can be improved. Can be improved.
In addition, in the present embodiment, an example in which the 2-link rotary nozzle described in the first embodiment is applied to a dishwasher has been described.
The rotary nozzle device described in any of the first to fourth embodiments may be used. Further, in the present embodiment, an example in which the rotary nozzle device is applied to a dishwasher has been described, but the present invention can be applied to a washing machine for washing not only dishes but also other things such as automobiles and semiconductor devices. Can be expected to improve the cleaning efficiency. It can also be applied to sprinklers, spray coating machines, and other water sprayers that require uniform liquid distribution.

[0085]

As described above, according to the present invention,
With a nozzle composed of multiple hollow links. The nozzle can be brought into a chaotic state by appropriately setting the jetting angle of the water from the jet port, the length, weight, and the position of the center of gravity of each link using the Lyapunov number and the fractal number.

Since chaos has orbital instability, the nozzle in the chaotic state does not pass the same orbit twice, and the injection port constantly moves in different orbits, resulting in a more uniform distribution than in the conventional case. Water can be sprayed.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a rotary nozzle device according to a first embodiment.

[Fig. 2] Explanatory diagram of operation locus of 2-link rotary nozzle

FIG. 3 is an explanatory diagram of a method for detecting the movement of a link.

[Fig. 4] Motion trajectory of a rotating nozzle in a chaotic state

FIG. 5 is a diagram showing a configuration of a rotary nozzle that achieves the same effects as those of the first embodiment.

FIG. 6 is a diagram showing a configuration of a rotary nozzle device according to a second embodiment.

FIG. 7 is a diagram showing a change pattern of pressing force.

FIG. 8 is a diagram showing a configuration of a rotary nozzle device according to a third embodiment.

FIG. 9 is a diagram showing a configuration of a connection portion of the first embodiment.

FIG. 10 is a diagram showing a configuration of a connecting portion according to a third embodiment.

FIG. 11 is an explanatory diagram showing that the strength of water injected changes according to the rotation of the link.

FIG. 12 is a diagram showing a configuration of a rotary nozzle device according to a fourth embodiment.

FIG. 13 is a diagram showing a configuration of a dishwasher which is a fifth embodiment.

FIG. 14 is a diagram showing a configuration of a conventional dishwasher.

FIG. 15 is a diagram showing a configuration of a conventional rotary nozzle.

FIG. 16 is a diagram showing a configuration of a connection portion of the fifth embodiment.

[Explanation of symbols]

1 nozzle drive pump 2 2-link rotary nozzle 10 Pressure control circuit 20 Water flow control 2-link rotary nozzle 30 sensor 31 Chaos feature calculation circuit 101 body 102 lid 103 Water supply hose 104 nozzle drive pump 105 rotating nozzle 106 drainage pump 107 Drain hose 108 Control circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Wakami 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-5-130964 (JP, A) JP-A-4 -67828 (JP, A) Actual development Sho 63-83163 (JP, U) Actual development Sho 53-108774 (JP, U) "Engineering application of chaos that started research Light on expression of non-linear phenomena", NIKKEI MECHANICAL, Published June 15, 1992, pp. 38-48 (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 15/42

Claims (11)

(57) [Claims] 1. A pump for pressurizing a fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one injection port for the fluid in at least one hollow link of the nozzle, In a rotary nozzle device that ejects fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by the pump, the rotation center of at least one hollow link that constitutes the nozzle is from the center of gravity of the hollow link. Far away,
A rotary nozzle device which makes the movement of at least one hollow link constituting the nozzle chaotic. 2. A pump for pressurizing a fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other via a connecting portion, and at least one fluid injection to at least one hollow link of the nozzles. In a rotary nozzle device that has a mouth and ejects fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by the pump, by providing play in at least one of the connection parts of the hollow link. A rotary nozzle device in which the center of rotation or the position of the center of gravity of each hollow link is changed according to the strength of the fluid flow, and the movement of at least one hollow link constituting the nozzle is in a chaotic state. 3. A pump for pressurizing a fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one fluid injection port in at least one hollow link of the nozzle, A rotary nozzle device for ejecting a fluid from the ejection port while rotating a hollow link by a force of a fluid pressurized by a pump, comprising a pressure control means for varying the pressure of the pump according to a constant periodic pattern. A rotary nozzle device for controlling the pressing force control means so that the movement of at least one hollow link constituting the nozzle is in a chaotic state. 4. A pump for pressurizing fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one fluid injection port on at least one hollow link of the nozzle, In the rotary nozzle device that ejects fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by the pump, a chaotic signal generating unit that generates a chaotic signal and a signal from the chaotic signal generating unit A rotary nozzle device comprising a pressure control means for changing the pressure of the pump, and controlling the pressure control means so that the movement of at least one hollow link constituting the nozzle is in a chaotic state. 5. A pump for pressurizing fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one fluid injection port in at least one hollow link of the nozzle, In a rotary nozzle device that ejects fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by a pump, at least one of the hollow links has a water flow suppressing unit that restricts the flow of the fluid in the hollow link. Installed in
A rotary nozzle device in which the strength of the fluid flow is changed according to the rotational position of each hollow link, and the movement of at least one hollow link constituting the nozzle is in a chaotic state. 6. A pump for pressurizing fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one fluid injection port in at least one hollow link of the nozzle, In the rotary nozzle device that ejects the fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by the pump, a sensor that detects the rotational motion characteristic of the nozzle,
A chaotic feature amount calculation circuit that calculates a chaotic feature amount from the data detected by the sensor; and a pump when the operation state of the nozzle is judged from the feature amount calculated by the chaotic feature amount calculation unit and the nozzle is not in the chaotic state. A rotary nozzle device that has a pressurization control circuit that changes the applied pressure of the nozzle and keeps the nozzle operation in a chaotic state at all times. 7. A rotary nozzle device according to any one of claims 1 to 6.
A washing machine equipped with a storage. 8. A dishwasher having either a rotary nozzle device of claims 1 6. 9. A water sprinkler equipped with the rotary nozzle device according to claim 1. 10. A pump for pressurizing fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one fluid injection port in at least one hollow link of the nozzle, In the rotary nozzle device that ejects the fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by the pump, in order to make the movement of at least one hollow link configuring the nozzle chaotic, Detecting the rotational movement characteristics of the nozzle, calculating the maximum Lyapunov number from the detected data, so that the maximum Lyapunov number is positive, the shape of at least one of the links, the weight, the position of the center of gravity, Alternatively, a method of designing a rotary nozzle device for determining at least one of fluid ejection angles of ejection ports. 11. A pump for pressurizing a fluid, a nozzle composed of a plurality of rotatable hollow links communicating with each other, and at least one fluid injection port in at least one hollow link of the nozzle, In the rotary nozzle device that ejects the fluid from the ejection port while rotating the hollow link by the force of the fluid pressurized by the pump, in order to make the movement of at least one hollow link configuring the nozzle chaotic, Detecting the rotational motion characteristics of the nozzle, calculating the fractal dimension from the detected data, so that the fractal dimension is a non-integer value, the shape of at least one of the links, the weight, the position of the center of gravity, or, A method for designing a rotary nozzle device for determining at least one of fluid ejection angles of ejection ports.