JP2014104305A - Bathtub washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathtub washing device capable of improving washing performance even with the same detergent consumption by using a detergent for washing without waste.SOLUTION: A bathtub washing device repeats a plurality of cycles with washing A and washing B as one cycle. The bathtub washing device opens a detergent solenoid valve by an open time set according to a hot water pouring flow rate of that moment in process P2-1 of the washing A, and continuously generates a washing liquid of a total amount of a washing liquid S1 sprayed in the washing A and a piping capacity S2 of a washing pipe 25 from a washing nozzle 24 to a detergent mixing part 26. The bathtub washing device opens only a hot water pouring solenoid valve after a prescribed waiting time, and presses out and sprays, from the washing nozzle, a washing liquid S2-α corresponding to an amount obtained by eliminating a margin amount α from inside the washing pipe 25 by a hot water pouring flow. The bathtub washing device repeats a combination of the washing A and the washing B a plurality of times until reaching the preset total open time of the detergent solenoid valve after the prescribed waiting time lapses.

Description

  The present invention relates to a bathtub cleaning device for automatically cleaning dust or hot water attached to the inner wall surface by spraying a cleaning liquid on the inner wall surface of the bathtub, etc. The present invention relates to a technique capable of improving the cleaning performance even with the same detergent consumption.

  Conventionally, as a bathtub cleaning device, a cleaning nozzle is installed in the bathtub, and the cleaning liquid is sprayed from the cleaning nozzle toward the inner wall surface of the bathtub by supplying a cleaning liquid mixed with a detergent to the cleaning nozzle. What cleans an inner wall surface is known. In such a bathtub cleaning device, for example, in Patent Document 1, if the flow rate of a hot water supply pipe is detected by a flow rate sensor and the detected flow rate is equal to or higher than a set flow rate, the detergent is supplied from the detergent charging device into the hot water supply pipe. In this case, it has been proposed to control the detergent charging flow rate from the detergent charging device in accordance with the detected flow rate. Specifically, it is described that the detergent concentration of the cleaning liquid supplied to the cleaning nozzle is made constant by adjusting the detergent input amount by controlling the opening degree of the detergent charging valve. Further, in Patent Document 2, when a detergent is mixed in hot water supplied through a pouring pipe by opening a solenoid solenoid valve, a water amount servo valve is provided on the pouring pipe upstream of the mixing section. It is described that the flow rate of hot water supplied to the mixing unit is controlled to a predetermined flow rate.

Utility Model Registration No. 2555269 Japanese Patent No. 3598808

  By the way, the cleaning pipe in which hot water is supplied from the upstream side and the downstream end is connected to the cleaning nozzle is usually provided with a detergent mixing part at an intermediate position. While the cleaning liquid after mixing is supplied to the cleaning nozzle, only the hot water without the detergent is supplied to the cleaning nozzle if the detergent solenoid valve is kept closed. As the bath cleaning process, usually, a cleaning liquid is supplied to the cleaning nozzle, and the cleaning liquid is sprayed from the cleaning nozzle to the inner wall surface of the bathtub for a predetermined time to wait for a while, and then sprayed again to wait for a predetermined number of times. It is considered that after rinsing, the rinsing is performed by spraying only hot water. In other words, each time the cleaning liquid is sprayed (sprayed), the detergent is mixed with hot water to supply the generated cleaning liquid, while at the other standby timing, the detergent solenoid valve is closed to stop the supply of hot water. Therefore, not the cleaning liquid but hot water stays in the cleaning pipe between the detergent mixing part and the cleaning nozzle.

  However, in the case of such a bath cleaning process, not only a sufficient contact time between the cleaning liquid and the inner wall surface of the bath cannot be ensured, but also the detergent is wasted. That is, it demonstrates based on the example of the bathtub washing process shown in FIG. In this example, when the process of repeating washing and standby three times between the preliminary rinse and the final rinse is performed, the cleaning pipe piped from the detergent mixing unit 101 to the cleaning nozzle 103 of the bathtub 102 in each process The situation in 104 (whether it is cleaning liquid or mere hot water) and what is sprayed or sprayed on the bathtub 102 indicates whether it is the cleaning liquid Z or the hot water M. In this case, in the first cleaning, the detergent mixing unit 101 mixes the detergent with hot water supplied to the cleaning nozzle 103, sprays the cleaning liquid Z into the bathtub 102, stops the supply of hot water, etc. Wait for time. This standby is provided in order to wash off dirt when the cleaning liquid adhering to the inner wall surface of the bathtub gradually flows down. Further, the amount of detergent mixed is determined by the opening time of the detergent solenoid valve. For example, 200 cc of the cleaning liquid Z1 corresponding to the amount of spraying once (for example, 170 cc) to the bathtub 102 is added to the cleaning liquid β. The detergent solenoid valve is opened for a time corresponding to the time that the cleaning liquid Z can be produced. Other than that, since the detergent solenoid valve is closed, at the time when the cleaning liquid is sprayed into the bathtub by the amount of the single spray, the cleaning liquid of the margin is placed in the cleaning pipe 104 upstream from the cleaning nozzle 103. The hot water M is filled behind β. The reason why the excess cleaning liquid β is left in the cleaning pipe 104 is to ensure that only the cleaning liquid is sprayed into the bathtub until the end of cleaning. Then, after the predetermined waiting time has elapsed, the second cleaning is started, hot water is supplied to the cleaning pipe 104 from the upstream side, the detergent solenoid valve is opened, and the detergent is mixed in the detergent mixing section. Thus, the cleaning liquid Z is supplied to the bathtub 102 side. Then, the cleaning liquid Z1 excluding β in the cleaning liquid Z is sprayed into the bathtub 102 from the cleaning nozzle 103 and stopped as in the first time. Then, after waiting for a predetermined waiting time, the third cleaning and waiting are performed in the same manner as described above to reach the final rinse.

  In the case of the example of FIG. 6, when the second cleaning is started, the hot water M in the cleaning pipe behind the excess cleaning liquid β after the first cleaning is supplied with the supply of hot water from the upstream side. It is pushed out into the bathtub and this is blown against the inner wall surface of the bathtub. For this reason, the inner wall surface to which the cleaning liquid is adhered for the first time is washed away, the contact between the cleaning liquid and the inner plane is scraped, and the inner wall surface becomes wet with hot water. As a result, the adherence of the cleaning liquid for the second cleaning sprayed from the inner surface to the inner wall surface is lowered, and the result of dripping at an early stage is caused. That is, in order to further improve the cleaning effect, the contact time between the cleaning liquid and the inner wall surface needs to be kept longer, but the contact time cannot be kept sufficiently. In addition, although a sufficient amount of cleaning liquid β is sprayed on the inner wall surface at the beginning of the second time, the cleaning liquid β flows down immediately with the hot and cold water sprayed subsequently, resulting in unnecessary consumption of detergent. Yes.

  The present invention has been made in view of such circumstances, and the object of the present invention is to improve the cleaning performance even if the amount of detergent used is the same so that the detergent is used without waste. It is in providing the bathtub cleaning apparatus to obtain.

  In order to achieve the above object, in the present invention, a detergent tank is connected to a supply pipe that is connected so as to be able to supply hot water to a cleaning nozzle arranged in a bathtub, and to a supply pipe that is located upstream of the cleaning nozzle. A detergent mixing portion provided so as to be able to mix the detergent from the opening and closing, and opening the detergent inlet of the detergent mixing portion to mix the detergent with the hot water supplied through the supply pipe In addition, the following specific matters are provided for a bath cleaning apparatus configured to supply the cleaning liquid to the cleaning nozzle. That is, as a bathtub cleaning process, a cleaning control unit is provided that intermittently executes a cleaning process of spraying a cleaning liquid from the cleaning nozzle into the bathtub. Then, as the cleaning control means, the cleaning liquid is generated so that the cleaning liquid continues from the cleaning nozzle to the upstream side in the supply pipe between the cleaning nozzle and the detergent mixing portion by one opening operation of the detergent inlet. The cleaning liquid in the supply pipe is sequentially pushed out toward the cleaning nozzle to perform a plurality of cleaning steps (claim 1).

  In the case of this invention, the cleaning liquid continuously generated in the supply pipe is sequentially pushed out, so that the cleaning liquid for the multiple cleaning steps such as the current cleaning step and the next cleaning step is cleaned. It will be sprayed into the bathtub from the nozzle. In other words, since the cleaning liquid newly adheres from the cleaning liquid adhering to the inner wall surface of the bathtub in this cleaning process in the next cleaning process, the contact between the inner wall surface of the bathtub and the cleaning liquid is continuous and sufficient. It can be maintained. In particular, the cleaning liquid attached to the inner wall surface of the bathtub in this cleaning process is compared with the case of the bathtub cleaning process in which new cleaning liquid is sprayed after hot water is sprayed and washed away at the start of the next cleaning. In addition, it is possible to maintain a longer contact time between the inner wall surface of the bathtub and the cleaning liquid, and in addition, since a new cleaning liquid is stacked from above, the quality of cleaning can be dramatically improved. Is possible. From the above, it is possible to greatly improve the cleaning performance even with the same detergent consumption.

  The bathtub cleaning apparatus of the present invention includes a flow rate detection means for detecting the flow rate of hot water supplied to the supply pipe, and serves as a cleaning control means for opening the detergent inlet according to the detected flow rate detected by the flow rate detection means. By setting the opening time for this, it is possible to produce a total amount of cleaning liquid used in a plurality of cleaning steps (claim 2). By doing so, even if the flow rate of hot water fluctuates, an accurate amount of cleaning liquid can be generated, and the bath cleaning process can be reliably performed.

  In the bathtub cleaning device of the present invention, the cleaning control means is configured to execute a standby process for each cleaning process, and the standby time of the standby process is set according to the detected flow rate detected by the flow rate detection means. (Claim 3). By doing in this way, it becomes possible to make appropriate the whole time which a bathtub washing process requires.

  Furthermore, in the bathtub cleaning apparatus of the present invention, the cleaning control means is configured to be able to execute a plurality of cycles as one cycle of a plurality of cleaning steps performed using a cleaning liquid generated by a single opening operation of the detergent inlet. The accumulated opening time obtained by integrating the opening time for each opening operation of the detergent inlet is within the range not exceeding the preset total opening time based on the total amount of detergent used in one bath cleaning process. It can be set as the structure repeated (claim 4). This makes it possible to increase the number of cleanings while maintaining the cleaning performance of the bath cleaning process at a predetermined level, regardless of whether the time required for each cleaning process depends on the flow rate of hot water. From this point, the cleaning performance can be enhanced.

  As described above, according to the bathtub cleaning device of the present invention, multiple cleanings such as the current cleaning process and the next cleaning process are performed by sequentially extruding the cleaning liquid continuously generated in the supply pipe. Since the cleaning liquid used in the process is sprayed from the cleaning nozzle into the bathtub, the cleaning liquid adhered to the inner wall of the bathtub in this cleaning process will be renewed in the next cleaning process. Therefore, it is possible to maintain the contact between the inner wall surface of the bathtub and the cleaning liquid continuously and sufficiently. In particular, the cleaning liquid attached to the inner wall of the bathtub in this cleaning process is compared with the case of the bathtub cleaning process in which new cleaning liquid is attached after hot water is sprayed and washed away at the start of the next cleaning. In addition, the contact time between the inner wall surface of the bathtub and the cleaning liquid can be maintained longer, and a new cleaning liquid is stacked from the top, so that the quality of cleaning can be dramatically improved. . From the above, it is possible to significantly improve the cleaning performance even with the same detergent consumption.

  In particular, according to the bathtub cleaning apparatus of the second aspect, the flow rate detecting means for detecting the flow rate of the hot water supplied to the supply pipe is provided, and the detergent inlet is used as the cleaning control means according to the detected flow rate detected by the flow rate detecting means. Even if the flow rate of hot water fluctuates, it is possible to generate an accurate amount by setting the opening time for the opening operation to generate the total amount of cleaning liquid used in multiple cleaning steps. A cleaning liquid can be produced | generated and a bathtub cleaning process can be performed reliably.

  According to the bathtub cleaning apparatus of the third aspect, as the cleaning control means, the standby process is executed for each cleaning process, and the standby time of the standby process is set according to the detected flow rate detected by the flow rate detection means. By doing so, the total time required for the bathtub cleaning process can be made appropriate.

  According to the bathtub cleaning apparatus of claim 4, as a cleaning control means, a plurality of cleaning steps executed by using a cleaning liquid generated by a single opening operation of the detergent inlet can be executed as a single cycle for a plurality of cycles. The cycle is configured so that the integrated opening time obtained by integrating the opening time for each opening operation of the detergent inlet does not exceed the preset total opening time based on the total amount of detergent used in one bath cleaning process By repeating the above, it is possible to increase the number of times of cleaning while maintaining the cleaning performance of the bath cleaning process at a predetermined level, even if the time required for each cleaning step varies depending on the flow rate of hot water. This also makes it possible to enhance the cleaning performance.

It is a schematic diagram which shows the bath system to which embodiment of the bathtub cleaning apparatus of this invention is applied. It is a whole flowchart of a bathtub cleaning process. It is a control flowchart of the washing | cleaning process using a washing | cleaning liquid. FIG. 4A is a table showing an example of the opening time and standby time of the detergent solenoid valve set for each pouring flow rate in cleaning A, and FIG. 4B is a pouring set for each pouring flow rate in cleaning B. It is a table | surface which shows the example of the open time and standby time of a hot water solenoid valve. The state of hot water or cleaning liquid supplied to the cleaning pipe from the detergent mixing part to the bathtub and the inside of the bathtub is shown for each process of preliminary rinsing, repeated cleaning A / standby and cleaning B / standby, and final rinse. It is explanatory drawing. About the example of the bathtub cleaning process compared with the present invention, the state of the hot water or the cleaning liquid supplied to the cleaning pipe from the detergent mixing part to the bathtub and the inside of the bathtub is preliminarily rinsed, repeated three times of cleaning and standby, And it is explanatory drawing shown according to each process of the last rinse.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a bath system to which a bathtub cleaning apparatus according to an embodiment of the present invention is applied. In the figure, reference numeral 1 denotes a bathroom wall or a building wall including a bathroom that defines a bathroom. A bathtub 2 and a bathtub cleaning unit 3 are disposed inside the wall 1, while a heat source machine is disposed outside the wall 1. (For example, a hot water heater-equipped bath pot) 4 is provided. In addition, FIG. 1 shows the connection of piping etc., and does not specify a vertical relationship.

  The heat source unit 4 is a composite heat source unit having a hot water supply function, a hot water filling function, and a replenishment function, and FIG. That is, the heat source device 4 is configured such that the bath heat exchanger 41 and the hot water supply heat exchanger 42 are arranged in one can and heat-exchanged by the combustion burner 43 that is a common heat source. In the following, the heat source device 4 will be described in detail, and then the configuration of the bathtub 2 side will be described in detail.

  The heat source unit 4 receives supply water such as tap water in a water supply passage, and causes hot water heated to a predetermined temperature by heat exchange heating with the combustion heat of the combustion burner 43 in a hot water supply heat exchanger 42 to the hot water supply passage 44. Hot water is supplied to hot water taps 45 and bathtub cleaning units 3 in various places such as a kitchen and a washroom through a hot water supply path 44. Further, the heat source unit 4 is provided with a recirculation circuit 48 composed of a return path 46 and a forward path 47 for realizing a reheating function, and hot water filled in the bathtub 2 is operated by operation of a circulation pump (not shown). It can be circulated between the bath heat exchanger 41 and heated up to a predetermined temperature. Further, in the heat source unit 4, the recirculation circuit 48 receives pouring water through a pouring path branched from the hot water supply path 44, and the pouring water is poured into the bathtub 2 through the recirculation circuit 48. The hot water filling is performed. At that time, the water level in the bathtub 2 is detected by the pressure detection type water level sensor 49 interposed in the recirculation circuit 48 in the heat source unit 4, and the detected water level value is output to the heat source unit controller 5. It has become. The water level sensor 49 measures and detects the water level in the bathtub 2 by detecting the water pressure in the closed recirculation circuit 48 communicated with the hot water in the bathtub 2.

  Each of the above hot water supply, reheating, and hot water filling operations is realized by operation control by the heat source controller 5 based on setting information such as a set hot water temperature and hot water temperature inputted by the kitchen remote controller 51 or the like. ing. For example, in the hot water supply control by the hot water supply control unit 52 (see FIG. 2), the water supply tap 45 is opened or the pouring electromagnetic valve 30 of the bathtub cleaning unit 3 is opened, so that the water flow in excess of a predetermined operating flow rate is detected. Then, the combustion burner 43 is combusted to heat incoming water from the water supply passage, and hot water having a predetermined temperature is discharged to the hot water supply passage 44. When the hot water filling control is started, the hot water pouring path is opened, and the combustion burner 43 is fired to heat the incoming water from the water feeding path so that hot water at a predetermined temperature is supplied to the hot water feeding path 44 and the hot water pouring path. The hot water is filled by pouring to the bathtub 2 through the recirculation circuit 48. At that time, in the case of automatic bath processing, after this hot water filling, reheating control for raising the temperature to a predetermined boiling temperature and maintaining it is performed by operating the circulation pump (not shown) and the combustion burner 43, respectively. To be done.

  In the bathtub 2 installed in the bathroom, a circulation adapter 21 is installed in the vicinity of the lowermost end of the side wall, a drain plug 22 of an automatic opening / closing drive control type and a cleaning nozzle 24 described later are installed on the bottom wall, and the upper surface side An opening / closing drive mechanism 23 and a later-described detergent tank 27 are installed on the flange wall. The circulation adapter 21 is connected with a return path 46 and a forward path 47 of the recirculation circulation path 48, respectively. Bath water in the bathtub 2 is sucked into the return path 46 via the circulation adapter 21, while the forward path 47. It is discharged into the bathtub 2. The drain plug 22 is opened and closed by receiving an opening / closing drive force from the opening / closing drive mechanism 23. The open / close drive mechanism 23 has an operation state (whether the drain plug 22 is open or closed). ) Is installed, and the opening / closing drive mechanism 23 is controlled based on the output signal from the sensor. When the drain plug 22 is opened, hot water in the bathtub 2 is discharged to the bottom of the bathroom and subsequently drained from the drain outlet of the bathroom.

  The bathtub cleaning unit 3 is installed for cleaning the inner wall surface of the bathtub 2 and the like. The bathtub cleaning unit 3 includes a cleaning nozzle 24 installed on the bottom wall of the bathtub 2, a cleaning pipe 25 that supplies a cleaning liquid to the cleaning nozzle 24, and a detergent mixing unit that mixes detergent at the upstream end of the cleaning pipe 25. 26, the detergent tank 27 for storing the detergent to be supplied to the detergent mixing section 26, the detergent electromagnetic valve 28 for switching the supply / stop of the detergent from the detergent tank 27, and the washing pipe 25 A hot water supply pipe 29 that communicates the hot water supply passage 44 so that hot water or water for cleaning (hereinafter referred to as “hot water”) is supplied to the upstream end, and hot water from the hot water supply passage 44 that is interposed in the hot water supply pipe 29. A pouring electromagnetic valve 30 for switching whether to supply, a flow rate sensor 31 for detecting the supply flow rate, and a flow rate adjustment valve 32 constituted by a water governor for adjusting the discharge flow rate to a predetermined constant flow rate, Configured with It has been. In addition, a check valve / edge cut valve set is interposed in the pouring pipe 29 between the detergent mixing portion 26 and the pouring electromagnetic valve 30. The check valve / edge cut valve set in the figure is configured by inserting two edge cut valves 34, 34 in a state of being sandwiched between the check valves 33, 33 on both upstream and downstream sides. In order to block the heat source device 4 side, which is the primary side, from flowing back from the bathtub 2 side to the heat source device 4 side even if it falls into a low pressure state (negative pressure state) due to a power failure or failure. It is to be intervened. In addition, the code | symbol 35 of FIG. 1 is a filter.

  The cleaning nozzle 24 is installed through the bottom wall of the bathtub 2 and sprays the cleaning liquid with a predetermined range from the front end opening (upper surface opening) toward the inner wall surface of the bathtub 2. Although only one cleaning nozzle 24 is shown in the figure, two or more cleaning nozzles 24 can be installed in a predetermined arrangement depending on the size of the bathtub 2 or the bathtub to be cleaned. For this purpose, the second and third cleaning pipes may be branched from the cleaning pipe 25 toward the other cleaning nozzles.

  The detergent mixing part 26 is constituted by a venturi tube. The detergent mixing unit 26 opens the detergent electromagnetic valve 28 (for example, intermittently opens for a predetermined time), so that a predetermined amount of detergent supplied from the detergent tank 27 passes through the pouring flow in the detergent mixing unit 26. Accordingly, the negative pressure suction action that occurs along with the suction liquid is sucked into the cleaning liquid and mixed. The detergent supply amount for one cleaning can be adjusted by the length of the valve opening time in which the detergent electromagnetic valve 28 is opened.

  The operation elements 28, 30, 32 of the bathtub cleaning unit 3 and the operation elements 22, 23 related to cleaning of the bathtub 2 are controlled by the cleaning controller 6 as cleaning control means, and from the cleaning controller 6. Power is supplied. A cleaning remote controller 61 for cleaning operation is electrically connected to the cleaning controller 6, while the cleaning controller 6 (see also FIG. 2) is connected to the heat source controller 5 so as to be capable of bidirectional communication. The heat source controller 5 and the cleaning controller 6 each include a microcomputer and storage means such as a RAM and a ROM, and each of the bathtub cleaning apparatuses including the bathtub cleaning unit 3 based on a program or control data stored in the storage means. The operating element is controlled to operate. That is, the heat source device controller 5 includes a hot water supply control unit and a bath control unit, and the cleaning controller 6 includes a cleaning control unit that executes a bath cleaning process. In addition to the kitchen remote controller 51, a bathroom remote controller 62 is connected to the heat source controller 5. The bathroom remote controller 62 can be used for input operations such as hot water filling and chasing operation. Further, although the control controller 6 is provided separately from the cleaning remote controller 61, it may be integrated in the cleaning remote controller 61.

  Next, an example of the bathtub cleaning process executed by the cleaning controller of the cleaning controller 6 will be briefly described with reference to FIG. 2. First, after preliminary rinsing (SUB1) is performed for a predetermined time using hot water without detergent. Next, cleaning using a cleaning solution (SUB2) is performed, and finally a final rinse (SUB3) is performed for a predetermined time using hot water without a detergent, and the process is terminated. In such bathtub cleaning processing, the ON switch for the cleaning operation of the cleaning remote controller 61 is turned ON, or when the reserved time set by the cleaning remote controller 61 is reached, the bathtub cleaning processing is started. First, the automatic drain plug 23 is opened. Control and wait until the bathtub water in the bathtub 2 is drained. When the drainage of the bath water is completed, as a preliminary rinsing (SUB1), the hot water solenoid valve 30 is controlled to open so that hot water is supplied from the heat source unit 4 through the hot water supply passage 44, the hot water supply passage 29 and the cleaning pipe 25. 24, and the process of spraying this hot water on the inner wall surface of the bathtub 2 from the washing nozzle 24 is performed for a predetermined time. When this preliminary rinsing is completed, cleaning using the cleaning liquid (SUB2) is performed, and finally the final rinsing (SUB3) is executed by performing the same operation control as the preliminary rinsing (SUB1). In the final rinsing, unlike the preliminary rinsing, even if the heat source unit 4 is burned, the low-temperature water is set to a predetermined minimum temperature setting temperature, and this low-temperature water is supplied from the heat source unit 4 to the hot water supply passage 44, pouring water. The cleaning nozzle 24 may be supplied through the passage 29 and the cleaning pipe 25 and sprayed to the inner wall surface of the bathtub 2. Alternatively, in the final rinse, the water supply may be guided as it is without blowing the heat source unit 4 and sprayed against the inner wall surface of the bathtub 2. That is, final rinsing may be performed using water or low-temperature water instead of hot water.

  Next, cleaning (SUB2) using a cleaning liquid, which is a characteristic part of the present embodiment, will be described in detail with reference to FIG. First, the pouring electromagnetic valve 30 is opened (step S21), and the pouring flow rate is detected by the flow rate sensor 31. It is determined whether or not the pouring flow rate is within an appropriate range (for example, 5.5 L / min to 8.4 L / min) (step S22). (NO in step S22, SUB4). If it is within the appropriate range (YES in step S22), next, each value of the opening time and standby time of the detergent solenoid valve 28 is set according to the detected pouring flow rate (detected flow rate) (step S23). ). For this setting, for example, a relationship table as shown in FIGS. 4 (a) and 4 (b) is stored and set in advance in the cleaning control unit, and depending on which range the detected flow rate belongs to, the opening of the corresponding detergent solenoid valve 28 is performed. What is necessary is just to calculate and set each value of time and waiting time, and the opening time and waiting time of the pouring solenoid valve 30. For example, if the detected flow rate is 6.0 L / min, 2.0 sec is set as the opening time ts of the detergent solenoid valve 28 in the cleaning A, which will be described later, and 45 sec is set as the waiting time tw. The opening time tc of the valve 30 is set to 1.2 sec, and the waiting time tw is set to 45 sec.

The opening time ts of the detergent solenoid valve 28 and the opening time tc of the pouring solenoid valve 30 are determined as follows. That is, the opening time ts of the detergent solenoid valve 28 is such that the cleaning liquid S corresponding to the total amount (for example, 200 cc) used in the two washing steps of washing A and washing B is equal to that of the detergent solenoid valve 28 as shown in FIG. The open time ts is set according to the detected flow rate so that it is generated by one opening operation. That is,
Opening time ts = total amount of cleaning solution S (ml) / detection flow rate (ml / sec)
Here, the total amount of the cleaning liquid S = (the cleaning liquid S1 used in the current cleaning A) + the piping capacity S2, and the piping capacity S2 = (the cleaning liquid S2-α used in the next cleaning B) + the margin α. If the detected flow rate is 6.0 L / min, 100 ml / sec, the cleaning liquid S1 is 70 ml, the cleaning liquid S2-α is 120 ml, and the margin α is 10 ml, for example, and the opening time ts of the detergent solenoid valve 28 is 2.0 sec. (See FIG. 4A). In this way, the cleaning liquid used for the two times of the cleaning A and the cleaning B is continuously generated by one opening operation of the detergent solenoid valve 28, and the cleaning liquid S2- for the amount used for the cleaning B after the execution of the cleaning A. α and the margin α are stored in the cleaning pipe 25 between the cleaning nozzle 24 and the detergent mixing portion 26. The pipe capacity in the cleaning pipe 25 is S2. In the present embodiment, the case of two times is described as an example, but the cleaning liquid used in the cleaning process for a plurality of times (for example, three times, four times, etc.) is continuously mixed in the detergent by the detergent mixing unit 26. This may be generated and stored in the cleaning pipe 25 from the cleaning nozzle 24 to the detergent mixing section 26.

In addition, the opening time tc of the pouring solenoid valve 30 is set such that the cleaning liquid S2-α stored in the cleaning pipe 25 is pushed out from the cleaning nozzle 24 in the cleaning B performed after the cleaning A and the subsequent standby process. A time value sufficient to allow the amount of pouring to be sprayed into 2 is set in relation to the detected flow rate. That is, (detection amount × time value = amount of cleaning liquid S2-α).
Opening time tc = (cleaning solution S2-α) (ml) / detection flow rate (ml / sec)
In the above example, if the detected flow rate is 6.0 L / min, 100 ml / sec and the cleaning liquid S2-α is, for example, 120 ml, so the open time tc is 1.2 sec.

  Then, the detergent electromagnetic valve 28 is opened for the open time ts (step S24), and the cleaning A is executed until the open time ts ends (NO in step S25). With the passage of time corresponding to the opening time ts, the cleaning liquid S generated by mixing the detergent in the detergent mixing unit 26 is supplied to the cleaning nozzle 24 through the cleaning pipe 25, and then a predetermined amount of the generated cleaning liquid S is supplied. Only the cleaning liquid S1 is sprayed into the bathtub 2 from the cleaning nozzle 24 (see step P2-1 in FIG. 5). If the time corresponding to the open time ts has elapsed (YES in step S25), both the detergent solenoid valve 28 and the pouring solenoid valve 30 are closed and the standby mode is entered (NO in steps S26 and S27). If the standby time tw has elapsed (YES in step S27), the pouring electromagnetic valve 30 is opened while the detergent electromagnetic valve 28 is kept closed, and cleaning B is started (step S28). If the opening time tc set in step S23 has elapsed, the cleaning B is terminated and the pouring solenoid valve 30 is closed (YES in step S29, S30). By this cleaning B, the cleaning liquid S2-α of the cleaning liquid S2 remaining in the cleaning pipe 25 between the cleaning nozzle 24 and the detergent mixing unit 26 at the end of the cleaning A, excluding the excess α. However, when the pouring solenoid valve 30 is opened, it is pushed out from the washing nozzle 24 by the pouring flow from the upstream side and sprayed into the bathtub 2 (see step P2-2 in FIG. 5).

  After completion of cleaning B, the system waits for the standby time tw while keeping the pouring solenoid valve 30 and the detergent solenoid valve 28 closed (NO in step S31). If the standby time tw has elapsed (YES in step S31), the previous opening time ts of the detergent solenoid valve 28 is integrated (step S32), and the integrated opening time (Σts) is set to a preset total opening time (for example, 6 sec). ) It is checked whether or not it is above, and it is confirmed that the integrated open time Σts is shorter than the set total open time (NO in step S33). Then, by executing the processing from step S21 to step S31 again, cleaning A and standby (see step P2-3 in FIG. 5) and cleaning B and standby (see step P2-4 in FIG. 5) are performed. Repeatedly, it is confirmed that the integrated opening time Σts of the detergent solenoid valve 28 is shorter than the set total opening time (NO in steps S32 and S33). Hereinafter, similarly, the cleaning A and standby (step P2-5) and the cleaning B and standby (step P2-6) in FIG. 5 are repeated, and the integrated open time Σts (for example, 2.0 + 2.0 + 2) at that time 0.0 = 6.0 sec) is equal to or longer than the set total opening time (for example, 6.0 sec), the cleaning using the cleaning liquid is finished, and the next final rinse (SUB3; see FIG. 2, step P3; see FIG. 5). )

  The setting of the time value of the set total opening time is determined as follows. The bathtub cleaning process can be selected and set according to the user's intention from among the powerful, normal, and simple cleaning menus. When “strong” is selected and set, the total opening time of the detergent solenoid valve 28 is, for example, 8 sec. Wash A and Wash B are repeated until the amount of detergent corresponding to the minute is consumed. If the initial setting is “normal”, for example, the amount of detergent corresponding to 6 seconds is selected, and if “simple” is selected and set, for example. The cleaning A and the cleaning B are repeated until the amount of detergent corresponding to 4 sec is consumed.

  In the case of the above embodiment, in the cleaning B performed after the cleaning A, the cleaning liquid is newly sprayed from above the cleaning liquid sprayed on the inner wall surface of the bathtub 2 by the cleaning A. Contact between the wall surface and the cleaning liquid can be continuously and sufficiently maintained. In particular, the cleaning liquid sprayed on the inner wall surface of the bathtub 2 by this cleaning is compared with the case of the bathtub cleaning processing in which new cleaning liquid is sprayed after hot water is sprayed and washed away at the start of the next cleaning. In addition, the contact time between the inner wall surface of the bathtub 2 and the cleaning liquid can be maintained longer, and a new cleaning liquid is stacked from above, so that the cleaning effect can be dramatically improved. Furthermore, since the excess amount of the cleaning liquid α is discarded only once every two times of the cleaning A and the cleaning B, the cleaning liquid β (refer to FIG. 6) is wasted more than each time. The amount of detergent consumed can be greatly reduced. From the above, it is possible to greatly improve the cleaning performance even with the same detergent consumption. Moreover, since the integrated value of the opening time of the detergent solenoid valve 28 is limited so as not to exceed the set total opening time, the cleaning A and the cleaning B are repeated as much as possible within the set total opening time. Even if the time required for each cleaning step may be longer or shorter depending on the detected flow rate, the number of cleanings can be increased while maintaining the cleaning performance of the bath cleaning process at a predetermined level. The performance can be enhanced. Furthermore, since the opening time of each of the detergent solenoid valve 28 that is opened by washing A and the hot water solenoid valve 30 that is opened by washing B is set according to the detected flow rate, it is consumed in the bathtub washing process. While maintaining the total amount of detergent to be kept constant, the change in flow rate due to changes in the supply water pressure based on the presence or absence of hot water use in the current hot water tap 45, etc. Even if this occurs, the bathtub cleaning process can be performed reliably.

<Other embodiments>
In addition, this invention is not limited to embodiment, It includes other various embodiment. That is, the installation position of the cleaning nozzle 24 is not limited to the bottom wall of the bathtub 2, and may be, for example, a side wall near the bottom wall. The present invention can also be applied to cases where various configurations such as a two-water type are used.

2 Bathtub 6 Cleaning controller (cleaning control means)
24 Cleaning nozzle 25 Cleaning pipe (supply pipe)
26 Detergent mixing section 29 Pouring channel (supply pipe)
27 Detergent tank 28 Detergent solenoid valve (detergent inlet)
30 Pouring solenoid valve

Claims (4)

The supply pipe connected so that hot water can be supplied to the cleaning nozzle arranged in the bathtub and the supply pipe located upstream from the cleaning nozzle can be mixed with the detergent from the detergent tank so that it can be opened and closed. A detergent mixing part provided, and by opening a detergent charging port of the detergent mixing part, a detergent is mixed into the hot water supplied through the supply pipe to generate a cleaning liquid, and then the cleaning liquid is supplied to the cleaning nozzle. A bath cleaning device configured to be able to supply
As a bath cleaning process, provided with a cleaning control means for intermittently executing a cleaning step of spraying a cleaning liquid into the bathtub from the cleaning nozzle,
This cleaning control means generates the cleaning liquid continuously from the cleaning nozzle to the upstream side in the supply pipe between the cleaning nozzle and the detergent mixing portion by one opening operation of the detergent charging port. It is configured to perform a plurality of cleaning steps by sequentially extruding the cleaning liquid in the supply pipe toward the cleaning nozzle.
Bathtub cleaning device characterized by that. The bathtub cleaning device according to claim 1,
A flow rate detecting means for detecting a flow rate of hot water supplied to the supply pipe;
The cleaning control means sets an opening time for opening the detergent inlet in accordance with the detected flow rate detected by the flow rate detecting means, so that the total amount used in the multiple cleaning steps is set. A bathtub cleaning device configured to generate a cleaning liquid. The bathtub cleaning device according to claim 2,
The said washing | cleaning control means is comprised so that a standby process may be performed for every washing | cleaning process, The waiting time of the said standby process is set according to the detected flow volume detected by the said flow volume detection means. It is a bathtub washing device according to claim 2 or claim 3,
The cleaning control means is configured to be able to execute a plurality of cycles, with a plurality of cleaning steps executed using a cleaning liquid generated by a single opening operation of the detergent charging port, and opening the detergent charging port. The accumulated opening time obtained by integrating the opening time for each operation is configured to repeat the cycle within a range not exceeding a preset total opening time based on the total amount of detergent used in one bath cleaning process. Bathtub cleaning device.

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