Constant feed water device

Abstract: A constant feed water device having a flow meter for measuring the quantity of water to be fed, a comparing device in which the detected values of the flow meter are inputted and the integrated flow rate is compared with the set quantity of the feed water, a controller for outputting valve closing signals when the integrated flow rate has reached the set quantity of the feed water, a valve to be closed by the valve closing signals, a feed water starting device for causing the valve to open, wherein the con­ troller has a learning switch for outputting selection signals of the feed water learning mode, a memory switch for outputting signals to specify the program to store the integrated flow rate, and a device for storing the integrated flow rate as the set quantity of the feed water according to the selection signals of the feed water learn­ ing mode of the learning switch and the signals from the memory switch, the comparing device compares the set quan­ tity of the feed water stored in the memory device with the integrated flow rate, so that the valve is automatically closed so as to stop feeding of water when the integrated flow rate has reached the set quantity of the feed water stored in the memory device.

Description: The invention relates to a constant water feeding device as indicated in the precharacterizing part of the claim. There are occasions where a constant feed water device is provided for feeding water (it may be a warm water) of a constant quantity to cocks or faucets and so forth used for bath-rooms, toilet rooms, and washing machines. As the constant feed water device of this type, there have been conventionally used a mechanically driven and electrically driven constant feed water devices. The electrically driven constant feed water device as dislosed in EP-A-0 267 701 is extensively used which comprises a flow meter for measuring the quantity of feed water, a comparing means in which a detected quantity of the feed water of the above flow meter is inputted and the integrated flow rate and the set quantity of feeding water are compared, a controller which outputs a valve closing signal when the integrated flow rate has reached the set quantity of feeding water, a valve which is closed by the above valve closing signal, and a feed water starting means which opens the above valve. As the feed water starting means, a feed water switch is used for example. In a conventional constant feed water device, the aimed feed water quantity is set by a setting means such as a dial. The dial is marked out, for example, every 10 liters of the set quantity of feed water and the desired aimed feed water quantity is set by turning the dial. A constant feed water device for bathtub has been in public use, in which a pressure sensor detects the water level in the bathtub so that water is stored up to a predetermined level in accordance with the detected water level. In cases where the aimed feed water quantity is set by a setting means such as a dial, the setting range of the aimed feed water quantity is limited to the range of numerical values graduated on the dial, so that the applications of the constant feed water device are limited, for example, to bathtubs, washbowls or washing machines. That is, in the case of a constant feed water device for bathtub, because the aimed feed water quantity will generally be set in a range from 100 to 300 liters, graduations thereof will also be set in such range with increments of about 5 to 20 liters, while in the case of a constant feed water device for washbowl, graduations, for example, with less increments ranging from about 0.1 to 0.5 liters are provided on the dial thus it is impossible for the same constant feed water device to feed water to both the bathtub and washbowl. In case, for example, where 200 liters of water is to be supplied, it is not known how high the level of the water to be stored in the bathtub will be until the user of the constant feed water device has repeatedly used the device and recognized the level of the stored water empirically. Therefore, if the user is not experienced in using the constant feed water device or if a bathtub, washing machine or wash bowl is changed to that with different volume, it has been quite difficult for the user to set the feed water quantity to the level of the aimed feed water quantity. In a constant feed water device wherein the level of the water in the bathtub is detected by a pressure sensor, its application will be limited almost to bathtub and thus an execution of work for installing a pressure sensor on the body of the bathtub becomes necessary. It is the object of the invention to provide a constant feed water device which can be adapted as it is to various applications such as to bathtub, wash bowl, and washing machine because the range of the set quantity of the feed water is not limited. This object is solved by the features as claimed in the characterizing part of the claim. In the invention, the controller comprises a learning switch for outputting numerical signals of a feed water learning mode, a memory switch for outputtings which specify to store the integrated flow rate, and a device for storing the integrated flow rate as the set feed water quantity according to the numerical signals of the feed water learning mode of the foregoing learning switch and the signals from the foregoing memory switch. In addition, the abovementioned comparing device is so constructed as to compare the set feed water quantity and the integrated flow rate stored in the foregoing memory device. In the constant feed water device according to the present invention, the learning mode is selected by the learning switch and water feeding is started by the feed water starting means to cause the water to be stored in the bathtub. The level of the stored water is then visually observed and the memory switch is operated when the level of the stored water has reached the desired level, and the integrated quantity of the fed water after starting water feeding is caused to be stored as the set quantity of the feed water. If the learning mode is not selected and the water feeding is started, the controller compares the integrated quantity of the fed water after starting water feeding with the set quantity of the feed water and the valve closing signal is issued to cause the water feeding to be stopped when the integrated quantity of the fed water has reached the set quantity of the feed water. As have been stated above, in the constant feed water device according to the present invention, it is possible to visually confirm the actual quantity of the stored water and establish the set quantity of the feed water. Therefore, it is possible to set accurately an aimed quantity of the feed water by one water storing operation. Brief Description of the Drawings Fig. 1 is a system diagram showing a construction of the constant feed water device in connection with an embodiment of the present invention. Fig. 2 is a block diagram. Fig. 3 is a flowchart. Preferred Embodiments In Fig. 1, at half the distance of the feed pipe 1 are provided a motor valve 2 and a flow meter 3, and the detection signal of the flow meter 3 is stored in a controller 4. In the controller 4 are also inputted signals from an operating unit 5 and control signals are outputted from the controller 4 to the motor valve 2. The operating unit 5 comprises a feed water/stop water switch for selecting the feeding of water and the stopping of water (shown as an ON/OFF code in the diagram) 6 and a learning switch 7 for selecting the feed water learning mode. The controller 4 comprises an operation control unit for driving the motor valve 2 and a comparing unit, a memory A, and a memory B for outputting control signals to the foregoing operation control unit. The operation control unit, comparing unit, memory A and B are arranged in a microcomputer as described in a later part. In an embodiment of the present invention, ON/OFF switch 6 functions as a memory switch. As shown in Fig. 2, the motor valve 2 has a motor 2a for opening and closing the motor valve and the foregoing motor 2a is driven by commercial power source supplied through a relay 8 or by the battery power source. This relay 8 is composed so as to rotate the motor 2a in forward and reverse directions. The flow meter 3 is equipped with a propeller 3a and a magnetic sensor 9 is installed in the proximity of a magnet 3c provided on a shaft 3b of the foregoing propeller 3a. Each time the shaft 3b makes one turn, the foregoing sensor 9 outputs a signal of one pulse. Detection signals of the sensor 9 are stored into a microcomputer 11 through an A/D converter 10. The microcomputer 11 issues control signals to the foregoing relay 8. The microcomputer 11 is stored with signals of the ON/OFF switch 6 and the learning switch 7. The microcomputer 11 consists of well-known structure and composed of a ROM for storing programs, a ROM for temporarily storing data and the like, a CPU or central processing unit, an input-output device, and data buses and the like for connecting the foregoing components. Referring to Fig. 3, there is shown control programs stored in the microcomputer 11. In Fig. 3, when a control starts, whether the learning switch 7 is ON or OFF is decided in a step 31 in the first place. If the learning switch is ON, the program proceeds to a step 32 where the memory content of the memory A is erased, then the program proceeds to a step 33 and waits there until the water feeding/water stopping switch (ON/OFF switch) is turned ON. When the water feeding/water stopping switch 6 is turned ON, the program shifts to a step 34, causing the motor valve 2 to open and close. By these operations, the flow meter 3 starts actuating. The program shifts from the step 34 to the step 35, causing the flow meter 3 to integrate (count) the flow rate thereof and the integrated flow rate to be stored in the memory B. Then, the program moves to a step 36 to decide whether the water feeding/water stopping switch 6 has been pressed. If the water feeding/water stopping switch 6 has not been pressed after the foregoing water feeding operation, the result of decision is OFF and returned from the step 36 to the step 35 and the water feeding and integration of the flow rate are continued. If the water feeding/water stopping switch 6 is pressed once again after the foregoing water feeding operation and the water stopping is selected, the program shifts from the step 36 to the step 37, causing the motor valve 2 to close. These operations complete the counting of the flow rate. The program then shifts to the step 38 to store the content of the memory in the memory A, data of the memory B are erased, and the program returns to the step 31. In the step 31, if the learning switch 7 is OFF, the program shifts to the step 39 and decides whether the water feeding/water stopping switch 6 has been pressed. If the water stopping mode of the water feeding/water stopping switch 6 is selected, the program returns to the step 31, and if the water feeding mode thereof is selected, the program shifts from the step 39 to the step 40, causing the motor valve 2 to open. By such operations, the counting of the flow rate is started. The program then shifts to the step 41 to obtain the integrated flow rate after counting the signal from the flow meter 3 and stores the obtained integrated flow rate in the memory B. The program will then be shifted to the step 42 to compare the value of the memory A with the value of the memory B. If the value of the memory A is greater than the value of the memory B, the program returns to the step 41 and the water feeding and flow rate counting are continued. As a result of the decision made by the step 42, if the value of the memory B becomes greater than the value of the memory A, the program shifts to the step 43, causing the motor valve 2 to close. According to these operations, the counting of flow rate is also completed. Afterward, the program returns to the step 31. As is apparent from the description of the program shown in Fig. 3, the integrated quantity of the feed water actually fed in steps 32 through 38 is stored in the memory A. Therefore, it becomes possible to feed water accurately up to the level of water established while actually observing it. In the foregoing embodiment, the water feeding/water stopping switch 6 is provided with the function of a memory switch, however, a special memory switch may be provided in the present invention, for outputting the signal to specify the program in addition to the water feeding/water stopping switch. In the foregoing embodiment, it is arranged so as to set one type of set quantity of the feed water, however, in the present invention, the number of memory may be increased so as to set a plurality of aimed quantity of the feed water. Further, in the foregoing embodiment, a motor valve which is driven by the motor 2a is adopted, but it is possible to employ various valves such as solenoid valve. Furthermore, a flow meter of various composition other than the above can be used.

Claims: A constant water feeding device comprising: a valve (2) which is closed by a valve closing signal; a flow meter (3) for measuring the quantity of the water to be fed; a controller (4), comprising memory means (A,B) and comparing means; said comparing means is inputted with the output of said flow meter and compares an integrated flow rate with a set quantity of the feed water; and feed water starting means (6) for opening said valve, wherein said controller (4) outputs a valve closing signal when the integrated flow rate has reached the set quantity of the feed water, characterized in that said controller (4) further comprises a learning switch (7) for selecting a feed water learning mode, and a program to store the integrated flow rate in said memory means (A,B) as the set quantity of the feed water when said feed water learning mode is selected, said program (Figure 3) initiates integration of flow rate when said feed water starting means (6) opens said valve (2) and finishes integration when said valve (2) is closed.

Inventors: HIRADE KEISUKE C O INAX CORPOR, KAWAMOTO RYUICHI C O INAX CORP, HIRADE, KEISUKE, C/O INAX CORPORATION, KAWAMOTO, RYUICHI, C/O INAX CORPORATION
Applicants: INAX CORP, INAX CORPORATION
Application year: 1990
Main classification: G01F15
IPC codes: G01F13, G01F15, F04B49, E03C1, G05D7