JPH04122226A - Bathing apparatus - Google Patents

Abstract

PURPOSE:To let the temperature of hot water reach any set one with few variation in temperature in a short time by providing a mixing device for adjusting the opening and closing of a hot water valve and water valve connected respectively to a hot water motor and water motor to control the temperature of mixed hot water. CONSTITUTION:A set temperature signal obtained from a temperature setter 25, temperature signal obtained from a mixer 5, temperature signal from a bath-tub temperature sensor 24, signal of pressure difference between the input side of the hot water valve 2 and the output side of the mixer 5, signal of pressure difference between the input side of the water valve 7 and the output side of the mixer 5 and temperature signal of a bath room temperature sensor 18 are calculatively processed by a microcomputer 22 on the basis of fuzzy theory. The hot water output signal and water output signal from the microcomputer 22 are sent to a hot water motor 12 and water motor 14 through a motor driving circuit 28. The temperature of mixed hot water is maintained at a desired constant preferable one by pivoting the hot water valve 2 and water valve 7 to introduce the mixed hot water to a faucet 9 for bothing use.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bathing device equipped with a mixing device for adjusting the temperature of hot water supplied to a bathtub during bathing or used for showering.

2. Description of the Related Art A conventional technique is described in Japanese Patent Application Laid-Open No. 2-4150. The technology described in this publication measures the temperature of hot water coming out of a three-way valve, uses this temperature signal to operate a motor valve controller, and uses the output of this motor valve controller to rotate the three-way valve via a motor. The hot water is then mixed to the desired temperature. Two three-way valves are connected in series to improve quick response and safety.

Problems with the Prior Art In the prior art described above, temperature control is achieved by connecting two three-way valves in series, which has the drawbacks of a complicated structure and a long response time.

Means for Solving the Problems The present invention solves the problems of the prior art, and provides a mixing device that uses fuzzy theory techniques to bring the temperature of hot water to an arbitrarily set temperature in a short period of time with minimal temperature fluctuations. The purpose is to provide a bathing device equipped with.

That is, the present invention provides a hot water motor 12 that opens and closes a hot water valve 2 connected to a hot water pipe 1 that receives hot water, and a water pipe 6 that receives water.
a water motor 14 that opens and closes a water valve 7 connected to the water motor 14;
A mixer 5 that mixes hot water from the hot water valve 2 and water from the water valve 7, and a temperature sensor 16 that measures the temperature of the hot water mixed by the mixer 5.

and a temperature setting device 25 for arbitrarily setting the temperature of the mixed hot water.

A hot water pressure sensor 3 installed on the input side of the hot water valve 2 to measure the pressure of hot water, a mixed hot water pressure sensor 4 installed on the output side of the mixer 5 to measure the pressure of the mixed hot water, and an input side of the water valve 7. A water pressure sensor 8 is provided to measure the water pressure, the set temperature information of the temperature setting device 25, the temperature information of the temperature sensor 16, the pressure difference information between the pressure of the hot water receiving part and the pressure of the mixed hot water, and the water receiving part. A control unit 20 operates based on information on the pressure difference between the pressure of the bathroom and the pressure of the mixed hot water and temperature information of the bathroom temperature sensor 18, and an output signal of the control unit 20 is applied to the hot water motor 12 and the water motor 14. The bath is equipped with a mixing device that controls the temperature of mixed hot water by adjusting the opening and closing of the hot water valve 2 and the water valve 7, which are connected to the hot water motor 12 and the water motor 14. It is a device.

Further, the control unit 2o performs calculations in accordance with control rules regarding hot water supply or heating, which consists of one condition part and a conclusion part corresponding to this condition part, and the condition part is based on the value of the temperature setting device 25 and the temperature The condition of the temperature compared with the value of the sensor 16, the condition of the pressure difference between the pressure of the hot water receiving part and the pressure of the mixed hot water, and the condition of the pressure difference between the pressure of the water receiving part and the pressure of the mixed hot water. , the temperature condition of the bathroom temperature sensor 18, and the conclusion part is created from the conclusion that the hot water valve 2 should be rotated and the conclusion that the water valve 7 should be rotated.

Hot water is obtained from a working hot water pipe 1 and put into a mixer 5 while controlling the amount of hot water passing through a hot water valve 2.

The pressure in front of the hot water valve 2 of the hot water pipe 1 is measured with a hot water pressure sensor 3.

Water is obtained from a water pipe 6 and is introduced into a mixer 5 while controlling the amount of water passing through a water valve 7.

The pressure in front of the water valve 7 of the water pipe 6 is measured by a water pressure sensor 8.

The pressure on the output side of the mixer 5 is measured by the mixing water pressure sensor 4.

Hot water and water flow into the mixer 5 and are mixed.

The mixed hot water is poured into a bathtub 17 and used for bathing.

The opening and closing of the hot water valve 2 is controlled by the hot water motor 12, and the water valve 7 is controlled by the hot water motor 12.
The water motor 14 controls the opening and closing of the hot water valve 2 and the water valve 7 to keep the temperature of the mixed hot water constant at a desired temperature.

A set temperature signal obtained from the temperature setting device 25, a temperature signal obtained from the mixer 5, a temperature signal from the bathtub temperature sensor 24, and a pressure signal of the pressure difference between the input side of the hot water valve 2 and the output side of the mixer 5. The microcomputer 22 calculates the pressure difference between the input side of the water valve 7 and the output side of the mixer 5 and the temperature signal of the bathroom temperature sensor 18 based on fuzzy theory.

The groove output signal and water output signal from the microcomputer 22 are
It is applied to the hot water motor 12 and the water motor 14 via the motor control circuit 28.

By rotating the hot water valve 2 and the water valve 7, the temperature of the mixed hot water is maintained constant at a desired suitable temperature, and this mixed hot water is led to the faucet 9 and used for bathing. (Hereinafter, blank spaces) Examples Examples of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the piping system and electrical configuration of the device of the present invention.

A hot water valve 2 is connected to a hot water pipe 1 that obtains hot water from an existing boiler. A hot water pressure sensor 3 is provided on the input side of a hot water valve 2 in a hot water pipe 1. The output of the hot water valve 2 is connected to a mixer 5.

A water valve 7 is connected to the water pipe 6 for obtaining tap water.
The output of is connected to a mixer 5 and mixed with the hot water, and the mixed hot water is led to a faucet 9.

In the water pipe 6, a water pressure sensor 8 is provided on the input side of the water valve 7.
will be established.

A hot water motor 12 is connected to a shaft 11 of a valve body 1o built in the hot water valve 2 via a hot water valve gear 13, and the rotation of the hot water motor 12 causes the valve body 10 to rotate.

A water motor 14 is connected to a shaft 11 of a valve body 10 built in the water valve 7, and the rotation of the water motor 14 causes the valve body
0 is rotated.

A temperature sensor 16 for detecting the temperature of the mixed hot water and a mixing hot water pressure sensor 4 for measuring the pressure of the mixed hot water are provided at appropriate positions inside the mixing hot water pipe 15 connected to the mixer 5.

The bathtub 17 has a bathtub temperature sensor 2 that measures the temperature of the water inside the bathtub 17.
4 is provided. The bathtub 17 is also provided with a water level sensor 19 that is activated when the hot water in the bathtub 17 reaches a predetermined depth.

A bathroom temperature sensor 18 for measuring the temperature of the bathroom is provided at an appropriate position in the bathroom where the bathtub 17 is installed.

The control unit 20 includes an A/D converter 21, a microcomputer 22, and a D/A
The converters 23 are sequentially connected.

The control unit 20 receives the temperature signal obtained from the temperature sensor 16, the pressure signal of the hot water pressure sensor 3 of the hot water valve 2 of the hot water pipe 1, the pressure signal of the mixed hot water pressure sensor 4, and the water valve 7 of the water pipe 6. The pressure signal from the water pressure sensor 8 of A hot water angle detector 26 is installed to detect the angle of the hot water valve 2.
The water valve angle signal of the water valve angle detector 27, which is connected to the shaft 11 of the water valve 7 and detects the angle of the water valve 7, are inputted.

Each of the above-mentioned signals is input to an A/D converter 21 in the control section 20, subjected to A/D conversion by the A/D converter 21, and then input to the microcomputer 22.

The setting signal of the temperature setting device 25, the temperature signal of the mixed hot water of the mixer 5, the pressure difference signal between the pressure on the input side of the hot water valve 2 and the pressure of the mixed hot water, and the pressure on the input side of water and the mixed hot water. The pressure difference signal with respect to the pressure of
A signal value related to the temperature of hot water to be supplied to the water is calculated.

In the present invention, a hot water pressure difference signal and a water pressure difference signal are given to the input of the microcomputer 22, but according to this configuration, the pressure on the input side of the valve of the hot water and water receiving section and the mixer 5 The difference between the pressure on the output side and the pressure on the output side can be determined.

The opening/closing status of the faucet 9 can be determined, and the valve can be controlled taking this opening/closing status of the faucet 9 into consideration. Therefore, when installing this device, it is possible to accurately control the temperature without being affected by the equipment conditions regarding hot water and water, improving the versatility of the device and increasing the reliability of the device.

When heating the hot water filled in the bathtub 17, the temperature sensor 1
6 is replaced with the temperature signal of the bathtub temperature sensor 24, the other signals are configured as described above, and each signal is sent to the microcomputer 2.
2, the microcomputer 22 calculates based on fuzzy theory, adjusts the hot water for heating with the output of the microcomputer 22, adds the hot water to the bathtub 17, and brings the hot water in the bathtub 17 to the desired set temperature. bring it to fruition.

The output of the hot water valve maximum rotation angle determining means 31 which determines the maximum rotation angle of the hot water valve 2 and the output of the water maximum rotation angle determining means 32 which determines the maximum rotation angle of the water valve 7 are as follows. After being D/A converted by the D/A converter 23, it is applied to the motor control circuit 28.

The output of the motor control circuit 28 is applied to the hot water motor 12 and the water motor 14, and the hot water motor 12 and the water motor 14 rotate the hot water valve 2 and the water valve 7.

In the configuration of the mixer in which the valve is rotated by a motor, mixed hot water maintained at the same or close to the set temperature is supplied from the faucet 9 to the bathtub 17, and the hot water supply continues until the water level sensor 19 of the bathtub 17 is activated. It is done.

The maximum rotation angle range of the valve body 10 connected to the hot water motor 12 via a gear is 120 degrees. The valve body 10 can be rotated 120 degrees from the base end position to the distal end position, but even if it can be rotated by a certain angle from an intermediate position, it cannot be rotated any further from the rotation end. The value of the maximum rotation angle that can be rotated from a certain position is detected by the hot water valve maximum rotation angle determining means 31, and the rotation angle is determined so as not to drive the motor beyond the range in which the valve can rotate. The upper limit of the range is detected by the hot water angle detector 26.

Similarly to the above, a water valve gear 30 consisting of a reduction gear is provided on the shaft 11 of the water motor 14, and the output of the water valve gear 30 is connected to the water valve 7.

The maximum rotation angle range of the valve body 10 connected to the water motor 14 via a gear is 120 degrees.

Further, the range of the maximum rotation angle from the relevant position of the water valve 7 is detected by the water maximum rotation angle determining means 32, and the detected signal is given to the microcomputer 22, which sends a rotation instruction signal to the water valve 7. Hold it within the maximum possible rotation angle range at the relevant position,
In order to avoid driving the motor beyond the range in which the valve can be rotated, the upper limit of the rotation angle range is set using the water angle detector 2.
7 is detected.

The sampling interval of each sensor is 0.1 seconds.

Next, each function of the microcomputer 22 that occurs when the microcomputer 22 performs temperature control applying fuzzy theory will be explained.

First, a case will be described in which hot water is supplied to the empty bathtub 17.

A storage element (for example, ROM) built into the microcomputer 22 stores hot water supply control rules shown in Table 1 in advance.

The hot water supply control rule consists of a condition part and a conclusion part corresponding to this condition part.

The condition part consists of four input membership functions, and the conclusion part consists of two output membership functions.

The four input attribution functions are an input attribution function regarding the temperature difference between the set temperature and the mixed hot water temperature, an input attribution function regarding the hot water pressure difference, and an input attribution function regarding the water pressure difference. There are four input membership functions related to bathroom temperature.

FIG. 5 shows a graph of the input membership function regarding the temperature difference between the set temperature and the mixed hot water temperature.

"The temperature of the mixed hot water is higher than the set temperature, which is expressed in terms of π" (hereinafter abbreviated as "high"), "almost the same as the set temperature" (hereinafter abbreviated as "same"), "The set temperature is higher than the set temperature" (hereinafter abbreviated as "high") The degree of attribution to the three ambiguous expressions ``lower'' (hereinafter abbreviated as ``low'') is shown.

FIG. 6 shows a graph of the input membership function regarding the pressure difference of hot water.

The difference in pressure of hot water indicates the degree of attribution to two ambiguous expressions: ``normal'' and ``low J.''

FIG. 7 shows a graph of the input membership function regarding the water pressure difference.

It shows the degree of attribution of the water pressure difference to two ambiguous expressions, ``normal'' and ``low.''

FIG. 8 shows a graph of the input membership function regarding bathroom temperature.

It shows the degree of attribution of bathroom temperature to three ambiguous expressions: ``hot,'' ``suitable temperature,'' and ``cold.''

The input membership degree function represents the degree to which the input temperature and pressure difference belong to each sensory-classified ambiguous expression.

A condition part consisting of 36 items is created by combining these four input membership degree functions.

A conclusion part consisting of two output membership degree functions is created in correspondence with the condition part.

The two output attribution functions are an output attribution function regarding the angle and direction at which the shaft 11 of the hot water valve 2 is rotated, and an output attribution function regarding the angle and direction at which the shaft 11 of the water valve 7 is rotated. It is a function.

FIG. 9 shows a graph of the output attribution function regarding the angle and direction in which the shaft 11 of the hot water valve 2 is rotated.

The rotation angle and direction in which the hot water valve 2 is to be rotated are ■
``Turn a large amount to the left (hereinafter abbreviated as ``large right''), ■ ``Turn a medium amount to the left'' (hereinafter abbreviated as ``Nakafu''), ■ ``Turn a small amount to the left'' (hereinafter abbreviated as ``Komizu'') ■"Turn slightly to the left" (hereinafter abbreviated as "slightly left"), ■"Do nothing" (hereinafter abbreviated as "nothing"), ■"Turn slightly to the right" (hereinafter "slightly right") (hereinafter abbreviated as "pebble"), ■"Turn slightly to the right" (hereinafter abbreviated as "pebble"), ■"Turn moderately to the right"
(hereinafter abbreviated as "r used"), ■ "Turn it far to the right"
(hereinafter abbreviated as "Oikun") indicates the degree of belonging to each of the nine ambiguous expressions, that is, the degree of belonging.

FIG. 10 shows a graph of the output attribution function regarding the angle and direction of rotation of the shaft 11 of the water valve 7.

The rotation angle and direction of the water valve 7 are shown as the degree of belonging to each of the nine ambiguous expressions in the same manner as the rotation angle and direction of the hot water valve 2.

The conclusion section corresponding to the condition section is created based on data obtained through extensive experience and is stored in the ROM.

A comparison/input means 33 in the microcomputer 22 compares the setting signal and the temperature signal of the mixed hot water to obtain a temperature difference.

The pressures on the input side of the hot water valve 2 and the output side of the mixer 5 are compared to obtain a pressure difference, and the pressures on the input side of the water valve 7 and the output side of the mixer 5 are compared to obtain a pressure difference. temperature signal.

The verification means 34 obtains the signal from the comparison/input means 33 and verifies to what extent this signal belongs to each of the four conditions of each negative term among the 36 terms of the hot water supply control rules.

The conversion means 35 applies the value of the degree of belonging of the condition part calculated by the matching means 34 directly to the degree of belonging of the conclusion part.

The summarizing means 36 sums up the degrees of belonging of the conclusion parts obtained by the converting means 35, and calculates one output value for each ambiguous expression.

The average value calculation output means 37 performs calculations according to predetermined regulations and calculates a final output value.

Based on this final product force value, the motor is driven at a predetermined angle,
The valve is rotated open and closed.

The hot water supply control rules and how to handle them will be explained in more detail using concrete numerical values.

First, the 36 items of hot water supply control rules shown in Table 1 will be explained.

The condition section divides the temperature of the mixed hot water into three conditions, depending on whether it is "high,""same," or "low," and indicates whether the pressure difference between the hot water is "low" or "normal" for each of these divided conditions. Divided into two according to the conditions, each divided into two according to whether the water pressure difference is "low" or "normal", and each divided into two according to whether the bathroom temperature is "hot". A condition section consisting of a total of 36 items is created by dividing it into three categories: "cold" and "suitable temperature."

The conclusion part for the condition part of Section 36 is created by combining the value indicating the degree of rotation of the hot water valve 2 and the value indicating the degree of rotation of the water valve 7.

That is, the degree of rotation of the hot water valve 2 is divided into nine categories from ``Oki'' to ``Ookimi'', and the degree of rotation of the water valve 7 is divided into nine categories from ``Oki'' to ``Okimi''. The degree and direction of rotation of the valve 2 and the degree and direction of rotation of the water valve 7 are combined based on a lot of experience, and a conclusion section is created using the combination, and the arrangement corresponds to the condition section of item 36. .

Next, FIGS. 5 to 8 showing the degrees of belonging for each ambiguous expression of the four conditions in the condition part will be explained.

In Figure 5, the temperature difference between the input mixed water temperature and the set temperature is plotted on the horizontal axis as a range from -10℃ to +10℃, and this range is divided into three categories: F, high, J, and low. , the degree to which the input temperature difference is thought to belong to the ambiguous expression is indicated by the degree of belonging, where 1 indicates that it is believed to belong 100%, 0 indicates that it does not belong, and the degree of belonging is set from 1 to 0. It is converted into numerical values and plotted on the vertical axis and graphed.

For each of the three ambiguous expressions ``high'', ``same'', and ``low'', the parts with the membership degree O overlap in the overall temperature, and the parts where the membership degree is not 0 but are close to O are only about 5 degrees Celsius from each other on both sides. There is overlap.

Below -10℃, 100% belongs to "low", +
10'C or higher is 100% assigned to "high".

The degree to which the input temperature difference belongs to each of the three ambiguous expressions is checked.

Figure 6 shows the pressure difference between input hot water from 0.3 kg/d to 0.7 kg/cd on the horizontal axis, and divides the input hot water pressure difference into two categories: "low" and "normal". , The extent to which the input pressure is attributed to the two ambiguous expressions is graphed with the numerical value of the degree of attribution set as 1 to 0 on the vertical axis.

Adjacent parts of two ambiguous expressions overlap each other by about 0.2 kg/ci in the part where the degree of membership is close to ○.

Below 0.3 kg/aJJi shall be 100% assigned to "low", and above 0.7 kg/d shall be 100% assigned to "normal".

Figure 7 shows the pressure difference of input water from 0.3 kg/d to O, Tkg/a! The difference in pressure of the input water is divided into r low and normal, and the degree to which the input pressure is attributed to each of the two ambiguous expressions is calculated. The graph is plotted with the numerical values of 1 to 0 on the vertical axis.

Adjacent parts of two ambiguous expressions overlap each other by about 0.2 kg/aJ in the part where the degree of membership is close to 0.

0.3 kg/a# or less shall be 100% attributed to "low", and 0.7 kg/d or more shall be 100% attributed to "rytsu".

In Figure 8, the input bathroom temperature is plotted on the horizontal axis from 8℃ to 32℃, and the input bathroom temperature is ``hot'' and ``hot''.
It is divided into three categories, ``suitable temperature'' and ``cold'', and the degree of belonging to the ambiguous expression is plotted as a graph from 1 to O on the vertical axis.

Adjacent parts of two ambiguous expressions overlap each other by 6°C in the part where the membership degree is close to O.

Below 8 degrees Celsius is 100% classified as "cold", and 32
℃ or higher is 100% attributed to "hot".

Next, FIGS. 9 and 10 showing ambiguous expressions of the two conclusions in the conclusion part will be explained.

FIG. 9 shows the rotation angle and direction of the hot water valve 2 by -1 among the conclusions in the conclusion part determined in accordance with the condition part of item 36 above.
The horizontal axis is from 20 degrees to +120 degrees, and the range of rotation angles is divided into nine ambiguous expressions from ``Adult J'' to ``Daikun''.
The degree of belonging to the ambiguous expression is plotted as a graph from 1 to O on the vertical axis.

It receives instructions from one specified conditional part, applies the output value of the conditional part (=value of degree of belonging) as is to a predetermined conclusion corresponding to that condition, and quantifies the conclusion part. be.

FIG. 10 is a graph regarding the rotation angle and direction of the water valve 7. The rotation angle and direction of the water valve 7 are plotted on the horizontal axis.
Taking the range from 0 degrees to +120 degrees, divide the rotation angle and direction of the shaft of the water valve 7 into nine groups from ``R'' to ``Okun'', and calculate the degree of belonging to each ambiguous expression from 1 to 0 vertically. It is plotted as an axis and graphed.

Next, how each means of the microcomputer 22 handles this hot water supply control rule will be specifically described.

The comparison/input means 33 is used to compare the signals from each sensor, and the comparison/input means 33 is used to check the output of the comparison/input means 33 against the condition part of the hot water supply control rules, and one output value is calculated from each term. do.

The collation means 34 collates the four actual measured values of the temperature difference between the set temperature and the mixed hot water temperature, the hot water pressure difference, the water pressure difference, and the temperature in the bathroom against the hot water supply control rule in Section 36.

For example, if the temperature difference between the set temperature and the mixed water temperature is -
3. When the temperature was 3.5℃, that is, the mixed water temperature was lower than the set temperature.
Describe a time when the temperature was 5°C lower.

In this example, in the hot water supply control rule, the set value is higher than the actual measured value and the temperature difference is 3.5°C, so it belongs to "r high" and "same".

From Figure 5, the degree of attribution to "high", that is, the degree to which the set value is thought to be higher than the actual measured value, is 0°7, and the degree of attribution to "same", that is, the degree to which the actual measured value is almost the same as the set value. It can be seen that the degree of similarity is 0.3.

Also, when the pressure difference of hot water is 0.5 kg/air,
Attributed to "normal" and "low".

From FIG. 6, it can be seen that the degree of belonging to "normal" is 0.5, and the degree of belonging to "low" is also 0.5.

Also, when the water pressure difference was 0.56 kg/cd,
Attributed to "normal" and "low".

From FIG. 7, it can be seen that the degree of belonging to "normal" is 0.8, and the degree of belonging to "low" is 0.2.

When the bathroom temperature was 23.6 degrees Celsius, the words "hot" and "
It belongs to "appropriate temperature".

From FIG. 8, it can be seen that the degree of attribution to "hot" is 0.6, and the degree of attribution to "suitable temperature" is 0.4.

The above degree of attribution is checked against each of the condition parts of the hot water supply control rule in Section 36, and two of these will be described as representative.

First, let us describe the case of checking against hot water supply control rule number 21. From FIG. 5, the degree of belonging to which the temperature difference between the temperature setting device 25 and the mixer 5 belongs to "the same" is 0.3.

From Figure 6, the degree of attribution of the hot water pressure difference to “normal” is 0.
．． 5, the degree of attribution of the water pressure difference to "low" from FIG. 7 is 0.2, and the degree of attribution of the bathroom temperature to "cold" from FIG. 8 is 0.

In this case, a rule is established to take the smallest value among the four membership degrees, and in accordance with this rule, "0" is set as the output value of the condition part.

Describing the case of checking against hot water supply control rule number 22, the degree of attribution that the temperature difference of the mixer 5 belongs to "same" is 0.3, and the degree of attribution that the pressure difference of hot water belongs to "normal" is 0.3. 5, the degree to which the water pressure difference is attributed to "normal" is 0.8, and the degree to which the bathroom temperature is attributed to "hot" is 0.6.

According to the above-mentioned rule of taking the smaller value of the degree of membership, r
Let o, 3J be the output value of the condition part.

Describing the case of checking against hot water supply control rule number 23, the degree of belonging to which the temperature difference of the mixer 5 belongs to "same" is 0.3, and the degree of belonging to which the pressure difference of hot water belongs to "normal" is 0.3. 5, the degree to which the water pressure difference belongs to "normal" is 0.8, and the degree to which the bathroom temperature belongs to "suitable temperature" is 0.4.

The smaller value of the degrees of membership is taken, and 34 is taken as the output value of the conditional part.

In this way, the output value of the condition part is calculated for all hot water supply control rule numbers 1 to 36.

The converting means 35 first converts the output value from the collation means 34, that is, the output value of the condition part in item 36, into the rotation angle and direction of the hot water valve 2 and the rotation angle and direction of the water valve 7 in the conclusion part. The output value of the conclusion part is created by directly applying the degree of membership of .

Taking hot water supply control rule number 22 as an example, since the degree of belonging of hot water supply control rule number 22 is 0°3 as described above,
Applying this 0.3 directly to the conclusion part, hot water valve 2
The degree of belonging to "slightly right" indicating the rotation angle and direction is 0
63, the degree of belonging to "slightly right" indicating the rotation angle and direction of the water valve 7 is also 0.3.

When the output value of the matching means 34 is 0, that is, the output value of the condition part is O.
In this case, there is no need to perform the conversion process, and the output value of the conclusion section becomes O.

Table 2 shows the results of the verification performed by the verification means 34.

The summarizing means 36 collects the attribution degree of each conclusion for each ambiguous expression from "Adult" to "Okun" in the conclusion part of hot water supply control rule numbers 1 to 36, and calculates the attribution degree of the same ambiguous expression. The degree of belonging is calculated by setting a rule that the largest value among them is the degree of belonging.

This calculated value is shown in Table 3.

Among the 36 items produced by the conversion means 35, the degrees of belonging for ambiguous expressions such as "center left,""none," and "center right" in each - item are summarized into one value.

Furthermore, when combining them into one, if one ambiguous expression and an adjacent ambiguous expression have different values, the ambiguous expression value is the larger value.

Regarding Figure 9, the part where the degree of belonging regarding the rotation angle and direction of the hot water valve 2 is "adult" overlaps with the "living tree" part of 0.4, but these two In the overlapping part, an ambiguous expression with a large value, that is, an ambiguous expression of "adult" is used.

The conclusion section regarding the water valve 7 in Figure 10 also shows the hot water valve 2.
can be summarized in the same way.

The power values of the summarizing means 36 explained above are shown in FIGS. 9 and 10.
It is indicated by diagonal lines in the figure.

Among the conclusions based on ambiguous expressions regarding Yuyoben 2, the degree of attribution to "adult" is 0.5, the degree of attribution to "living tree" is 0.4, and the degree of attribution to "dwarf" is 0.5. Therefore, the degree of belonging to "slightly left" is ○.

The degree of attribution of "none", "slightly right", and "small cloth" is 0°3.

Similarly to the above hot water valve 2, when talking about the rotation angle and direction of the water valve 7, the degree of belonging to "r adult" and "r middle seat" is 0, and the degree of belonging to "dwarf" is 0. The degree is 0°2, the degree of belonging to “slightly left” is 0.3, the degree of belonging to “none” is 0.3, and the degree of belonging to “slightly right” and “obu” is ○. Become.

The degree of belonging to "Nakafu" is 0.4, and the degree of belonging to "Oigimi" is 0.5.

To describe the process of calculating the values of the rotation angle and direction of the hot water valve 2 from the summarized results in Table 3, the average value calculation output means 37 calculates both of the values summarized into one. A single value is calculated by multiplying the angle and the degree of belonging, adding all the terms, and dividing this value by the sum of the degrees of belonging of each term.

This value is the final output in the fuzzy calculation of the microcomputer 22.

The final output for the hot water valve 2 is applied to a hot water valve maximum rotation angle determining means 31 that determines the maximum rotation angle of the hot water valve 2. The final output for the water valve 7 is applied to a water valve maximum rotation angle determining means 32 that determines the maximum rotation angle of the water valve 5.

Next, a description will be given of a mixing device for heating the hot water filled in the bathtub 17. In this case, the temperature sensor 16 of the mixing device during hot water supply is replaced with the bathtub temperature sensor 18, and the hot water supply control rule is changed to the heating control rule. Instead, the other configurations are implemented in the same manner as the configuration for hot water supply described above.

Note that during heating, the function of the water level sensor 24 is not involved in this apparatus.

As with the hot water supply control rules, the contents of the heating control rules are created based on a lot of experience.

If the water heater does not follow the fluctuations in the temperature and pressure of the hot water source and the fluctuations in the temperature and pressure of the water source, some sick people often have sensory disturbances. Accidents may occur in which the user is unaware of the rise in temperature of the hot water sprayed from the shower nozzle 29, resulting in rashes or incontinence.

Therefore, a water heater used for bathing a sick person who requires assistance is required to be capable of quickly responding to fluctuations in hot water and water temperature and supplying a stable and appropriate temperature. In particular, the current state of the supply of hot water is not good, as there is a limit to the capacity of the boiler, resulting in significant fluctuations in temperature and pressure.

The mixing device of the present invention not only detects the temperature of the mixed hot water as conventionally done, but also detects the pressure difference between the hot water and the water pressure. With this configuration, it is possible to detect the temperature of the supply source. In response to pressure fluctuations, temperature fluctuations in the mixed bath water can be suppressed to a smaller level and the temperature can quickly converge to a desired set temperature, making it extremely convenient for use in bathing sick people who require assistance. The bathing device of the invention is therefore exclusively for medical use.

In addition, 38 in FIG. 1 is a hot water stop valve that stops the flow of hot water from the mixer 5 to the hot water valve 2, and 39 stops the flow of water from the mixer 5 to the water valve 7. It is a water shutoff valve.

Tables 1 to 3 are shown below. (Left below) The water temperature is almost the same as the set temperature, and "Low J" is an abbreviation that indicates that the set temperature is lower than the mixed water temperature.Table 1~
In 3, "large right" means turning the hot water valve or water valve largely to the left, "r middle table" means turning the hot water valve or water valve medium to the left, "small right" means turning the hot water valve or water valve to the left. Turn the valve slightly to the left, "slightly left"
：Turn the hot water valve or water valve slightly to the left, ``No'' does nothing about the rotation of the hot water valve or water valve, [Slightly right J：Turn the hot water valve or water valve slightly to the left Turn the hot water valve or water valve to the right. This is an abbreviation for turning the valve far to the right. ) Effects of the Invention The present invention first provides ambiguous temperature information about the temperature of the mixed hot water made by mixing water and hot water, ambiguous pressure information about the pressure difference between the hot water, and ambiguous pressure information about the pressure difference of the water. , a set of ambiguous temperature information about the bathroom temperature is created in advance as a control rule for each region of the rotation angle range of the hot water valve and the water valve. next,
After comparing the input signal related to the actual measurement with the ambiguous set of each region (=condition part of the control rule) and obtaining a set of multiple temporary output values from the conclusion part of the control rule, this output value is The final value is obtained by calculation between the sets of , and the output signal of the final value drives the valve.

The effects of the method and means for obtaining the final value described above are, firstly, there is only a simple control rule, and the output for control is read from this control rule value stored in advance;
Since complex calculations are omitted, the calculation speed is fast, and the time from obtaining the input value to producing the output value is short, resulting in a short time to reach the set temperature.

Furthermore, since strict numerical tracking is not performed with respect to input fluctuations, overshoot does not occur, and an output value is obtained by converging gently.

Second, even if there are fluctuations in the temperature of the supplied water, fluctuations in the temperature of the hot water being supplied, fluctuations in the hot water supply pressure, or fluctuations in the water supply pressure, the output that compensates for the fluctuations will be short. Since the hot water comes out in hours, there is little variation in the temperature of the water that appears at the faucet, and there is very little variation in the mixed water temperature due to changes in the pressure or temperature of the hot water source or water supply source, and there is little time for it to deviate from the set temperature, making it stable. You can get hot water at an appropriate temperature.

Thirdly, since the time for the mixed water to reach the set temperature is short, there is less time to discharge hot water that cannot be used until the temperature reaches the appropriate temperature in a shower or the like, which saves on kudzu hot water and water.

Fourth, because it has the above effects, if it is used to bathe a sick person who requires assistance, it will prevent dangerous situations such as the caregiver pouring too hot water on the sick person or bathing the sick person in too hot water. This is extremely convenient as it allows the bather to bathe safely and with peace of mind while avoiding situations that cause discomfort to the bather.

In addition, the bathroom temperature is automatically reflected in the hot water temperature, so that when the bathroom temperature is low, the hot water temperature is slightly higher, and when the bathroom temperature is high, the hot water temperature is slightly lower.
Bathers can always take a bath at a comfortable water temperature.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, and FIG. 1 is a diagram showing the piping system and electrical configuration, FIG. 2 is a block diagram showing the functions of the microcomputer, FIG. 3 is a sectional view of the valve, and FIG. Figure 4 is a flowchart, and Figure 5 is an input membership degree function graph showing the relationship between the difference between the set temperature and the mixed water temperature and the degree of affiliation of ambiguous expressions.
FIG. 6 is an input membership degree function graph showing the relationship between the pressure difference of hot water and the degree of belonging of ambiguous expressions, and FIG. 7 is an input membership degree function graph showing the relationship between the water pressure difference and the degree of membership of ambiguous expressions. Figure 8 is an input membership degree function graph showing the relationship between bathroom temperature and the degree of belonging of ambiguous expressions, and Figure 9 is an output function graph showing the relationship between the rotation angle and direction of the hot water valve and the degree of belonging of ambiguous expressions. Attribution Degree Function Graph FIG. 10 is an output belonging degree function graph showing the relationship between the rotation angle and direction of the water valve and the degree of belonging of an ambiguous expression. 1... Hot water pipe, 2... Hot water valve, 3... Hot water pressure sensor, 4... Mixing hot water pressure sensor, 5... Mixer, 6...
・Water pipe, 7... Water valve, 8... Water pressure sensor, 12
...Hot water motor 14...Water motor 16...
・Temperature sensor, 18...Bathroom temperature sensor, 20...
Control unit, 24... Bathtub temperature sensor, 25... Temperature setter, 28... Motor control circuit

Claims (2)

[Claims] (1) A hot water motor 12 that opens and closes the hot water valve 2 connected to the hot water pipe 1 that receives hot water, and a water motor 14 that opens and closes the water valve 7 that is connected to the water pipe 6 that receives water; Hot water valve 2
A mixer 5 that mixes the hot water from the water valve 7 with the water from the water valve 7.
and a temperature sensor 16 that measures the temperature of the hot water mixed in the mixer 5.
and a temperature setting device 25 for arbitrarily setting the temperature of the mixed hot water.
A hot water pressure sensor 3 installed on the input side of the hot water valve 2 to measure the pressure of hot water, a mixed hot water pressure sensor 4 installed on the output side of the mixer 5 to measure the pressure of the mixed hot water, and an input side of the water valve 7. A water pressure sensor 8 installed in the water pressure sensor 8 to measure water pressure, set temperature information of the temperature setting device 25, temperature information of the temperature sensor 16, pressure difference information between the pressure of the hot water receiving part and the pressure of the mixed hot water, and the water receiving part and a control section 20 that operates by obtaining pressure difference information between the pressure of the hot water and the pressure of the mixed hot water and temperature information of the bathroom temperature sensor 18, and a hot water motor 12 and a water motor 14 to which output signals from the control section 20 are applied.
The bath is equipped with a mixing device that controls the temperature of mixed hot water by adjusting the opening and closing of the hot water valve 2 and the water valve 7, which are connected to the hot water motor 12 and the water motor 14. Device. (2) The control unit 20 performs calculations in accordance with control rules regarding hot water supply or heating, which consists of a condition part and a conclusion part that corresponds to the condition part. The conditions of the temperature compared with the value of the temperature sensor 16, the conditions of the pressure difference between the pressure of the hot water receiving part and the pressure of the mixed hot water, and the conditions of the pressure difference between the pressure of the water receiving part and the pressure of the mixed hot water and the temperature condition of the bathroom temperature sensor 18, and the conclusion section is created from a conclusion to rotate the hot water valve 2 and a conclusion to rotate the water valve 7. A bathing device according to claim 1.