JP5874221B2 - Bathtub cleaning equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a bathtub cleaning apparatus for automatically cleaning dust or hot water attached to an inner wall surface by spraying cleaning water onto the inner wall surface of the bathtub, and more particularly to storing the cleaning water sprayed into the bathtub. The present invention relates to a technique for making a detergent concentration uniform in cleaning water in a tank that is collected and circulated and cleaned using cleaning water for bathtub cleaning.

  Conventionally, Patent Literature 1 proposes a bathtub cleaning apparatus that has both a detergent spray nozzle that sprays detergent-mixed water into a bathtub and a rinse nozzle that sprays clean water or hot water into the bathtub. In this system, it is proposed that detergent stored in the buffer tank is poured into the detergent tank to obtain detergent-mixed water, and this detergent-mixed water is heated with a heater and sprayed from the spray nozzle onto the bathtub. Yes. Patent Document 2 proposes a bathtub cleaning apparatus in which a buffer is connected to the bottom of the bathtub, connected to the cleaning nozzle at the top of the bathtub through a circulation path, and a circulation pump is interposed in the circulation path. ing. In this case, after the detergent from the detergent tank supplied to the circulation path is put into the bathtub from the washing nozzle and taken into the buffer from the bottom of the bathtub and stored, the water is then sprayed from the washing nozzle into the bathtub. It has been proposed to allow this water to flow into the buffer and be mixed with the detergent.

Japanese Patent No. 3160373 Japanese Patent No. 2831874

  By the way, in order to reduce the amount of water used for washing the bathtub and the amount of detergent used, the washing water sprayed from the washing nozzle into the bathtub for washing the bathtub is not drained as it is. Since then, the development of a circulating cleaning system in which the cleaning water in the water storage tank is supplied to the cleaning nozzle by a circulating pump to perform bath cleaning has been developed. In such a circulating cleaning system, the cleaning water in the water storage tank that is circulated for cleaning the bathtub has a uniform detergent concentration throughout the entire tank and a predetermined detergent concentration. However, it is required to obtain a stable cleaning effect. However, it is difficult to achieve a uniform detergent concentration throughout the wash water used for circulating washing, simply by throwing the detergent into the water or simply sucking the detergent into the water stream due to the venturi effect. It is thought that it is not realistic. Furthermore, in order to obtain a uniform detergent concentration, it is not preferable to newly add special functional parts, which increases the cost of the product.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide detergent for washing water containing detergent used for circulation washing without adding any special parts in the circulation washing method. It is an object of the present invention to provide a bath cleaning apparatus capable of uniformizing the concentration quickly and reliably.

In order to achieve the above object, in the present invention, the wash water sprayed into the bathtub is collected and stored in the water storage tank, and the wash water in the water storage tank is sucked in by the operation of the circulation pump. The following specific matters are provided for a bath cleaning apparatus provided with a circulating cleaning control means for performing a bathtub cleaning process by circulating cleaning by supplying the cleaning nozzle through the cleaning nozzle and spraying the cleaning nozzle through the cleaning nozzle. It was. That is, the circulation cleaning control means includes a detergent mixing processing unit for mixing detergent before executing the bath cleaning processing, and the water storage tank is operated by operating the circulation pump as the detergent mixing processing unit. while circulating between hot water of the bathtub, which is water within, a configuration for executing the detergent supply from the detergent tank before circulating way or circulation for that hot water.

When this specific item is provided , the hot water in the water storage tank and the detergent supplied to the hot water during or before circulation are caused to flow through the washing water supply path to the washing nozzle by the operation of the circulation pump. Thus, the circulation of being collected again from the bathtub into the water storage tank is repeated. By this circulation, mixing of the hot water and the detergent is repeated, and the detergent concentration is made uniform.

In the present invention , in addition to controlling the operation of the circulation pump so that washing water is circulated and supplied to the washing nozzle at a set large flow rate during the bathtub washing treatment by the circulation washing control means, It was configured to operate controlling the circulation pump in reduced set set a small flow rate than the set high flow (claim 1). By doing so, while hot water and detergent are circulated between the water storage tank and the bathtub, the cleaning nozzle once circulates to the external space in the bathtub, but is circulated at a set small flow rate. Therefore, it is possible to achieve a uniform detergent concentration while maintaining a substantially liquid state without foaming. Moreover, since the flow rate in the detergent mixing process is set to be smaller than the set large flow rate, it is not necessary to wait for it to travel down from the inner wall surface of the bathtub as in the case of the bathtub cleaning process. Will be speeded up.

In this case, as the set small flow rate, the flow rate value is set such that the hot water supplied with the detergent does not jump out of the washing nozzle into the air in the bathtub and flows out from the washing nozzle onto the bottom wall surface of the bathtub. (Claim 2 ). By doing in this way, the effect | action by Claim 1 can be obtained concretely and reliably, and it becomes possible to aim at speeding-up until the said detergent density | concentration equalization more reliably.

  As described above, according to the bathtub cleaning device of the present invention, the hot water in the water storage tank and the detergent supplied to the hot water during or before circulation from the water tank by the operation of the circulation pump. It can be repeatedly circulated between the tub and the water storage tank so that it flows into the water tub through the cleaning water supply channel and reaches the tub, and is recovered again from the tub to the water storage tank. The detergent concentration can be made uniform by repeating the mixing of the detergent with the detergent.

In addition, as a detergent mixing processing unit, by configuring the circulation pump to operate with a small set flow rate that is smaller than the set large flow rate that is the operation control amount of the circulation pump in the bathtub cleaning process, While the detergent is circulated between the water storage tank and the bathtub, the washing nozzle once exits to the external space in the bathtub, but since it is circulated at a set small flow rate, it does not foam and is almost in a liquid state. The detergent concentration can be made uniform while maintaining the state as it is. Moreover, since the flow rate for the detergent mixing process is set to be smaller than the set large flow rate, it is possible to avoid having to wait for it to fall off from the inner wall surface of the bathtub as in the bathtub cleaning process, so that the detergent concentration is uniform. It is possible to speed up the process.

According to claim 2 , the flow rate value is set so that the hot water supplied with the detergent flows out from the washing nozzle onto the bottom wall surface of the bathtub without jumping out from the washing nozzle into the air in the bathtub. By doing so, the effect according to claim 1 can be obtained specifically and reliably, and further, the speeding up to the uniform concentration of the detergent can be more reliably achieved.

It is a mimetic diagram showing the bath system to which the bathtub washing device concerning a 1st embodiment of the present invention is applied. It is a perspective view of the collection | recovery set which consists of a water storage tank of FIG. 1, and a waste_water | drain collection part. It is explanatory drawing shown in the perspective view of the state which cut the collection | recovery set by the AA sectional view of FIG. It is a flowchart which shows the control which concerns on circulation cleaning. FIG. 2 is a view corresponding to FIG. 1 and illustrating a flow state at the time of preliminary rinsing cleaning. FIG. 6 (a) shows the state of the flow at the time of preliminary rinsing in the state where the recovery set cut along the line AA in FIG. 2 is installed at the drain of the bathtub and the automatic drain plug is omitted. 6 (b) is a diagram corresponding to FIG. 6 (a) showing a flow state during circulation cleaning including detergent mixing and bathtub cleaning. It is a figure corresponding to FIG. 1 which shows the condition of the flow at the time of the circulation washing which consists of detergent mixing and bathtub washing.

  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 2 is a bathtub installed in a bathroom, 3 is a bathtub cleaning device, 4 is a heat source machine (for example, a hot water heater with a reheating function), and 5 is a controller for controlling the operation of the bathtub cleaning apparatus 3 and the heat source machine 4. It is. The heat source unit 4 supplies hot water or water (hereinafter simply referred to as “hot water”) to the bathtub cleaning device 3 as described later. In addition, FIG. 1 shows the connection of piping etc., and does not specify the up-and-down relationship of the bathtub 2, the heat source machine 4, etc. FIG. In the following description, “washing water” includes not only hot water mixed with detergent but also hot water for pre-washing and rinsing without detergent. First, after briefly explaining the configuration of the heat source unit 4, the bathtub 2 and the bathtub cleaning device 3 will be described.

  As the heat source unit 4, FIG. 1 illustrates a composite heat source unit having a hot water supply function, a reheating function, and the like. The heat source unit 4 receives incoming water such as tap water and supplies hot water heated to a predetermined temperature by heat exchange heating with the combustion heat of the combustion burner 41 in a heat exchanger to various hot water taps 42 such as a kitchen, The recirculation circuit is used to pour hot water into the bathtub 2 for hot water filling, or heated hot water or unheated water is passed through the hot water supply path 43 to the cleaning water supply path 32 of the bathtub cleaning device 3. Or to supply. A filter 44, a flow sensor 45, a supply electromagnetic valve 46, and an edge cut valve set 47 are interposed in the hot water supply path 43 in order from the upstream side, and the downstream end of the hot water supply path 43 is a three-way connection joint (for example, cheese) It is connected to a pipe joint) 39 and joins the cleaning water supply path 32. As the edge cut valve set 47, for example, two edge cut valves are interposed in a state of being sandwiched between a pair of check valves interposed at both upstream and downstream positions of the hot water supply passage 43. . 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. The hot water supply path 43 constitutes a rinse water supply path for rinsing for supplying rinse water for rinsing when performing preliminary rinse cleaning and rinse cleaning described later.

  Each operation such as hot water supply, reheating and hot water filling by the heat source device 4 is realized by operation control by the controller 5 based on setting information such as a set hot water temperature and hot water temperature inputted and set by the kitchen remote controller 51, for example. Further, the cleaning operation by the bathtub cleaning device 3 is realized by the operation control of the circulation pump 35 and the detergent electromagnetic valve 38, which will be described later, based on ON / OFF of the cleaning switch input by the cleaning remote controller 52 and automatic cleaning processing. It has become.

  The bathtub 2 is placed in a bathtub pan (not shown) installed in the bathroom, and a water storage tank 34 to be described later is disposed in a gap between the bathtub pan and the bathtub 2. A circulation adapter 20 is installed in the vicinity of the lowermost end of the side wall of the bathtub 2, an automatic opening / closing drive control type drain plug 22 for opening and closing the drain outlet 21 and a cleaning nozzle 31 to be described later are installed on the bottom wall. On the side flange wall, an opening / closing drive mechanism 23 and a later-described detergent tank 37 are installed. The circulation adapter 20 is connected to a retreating path and a retreating path of the reheating circulation path of the heat source unit 4 so that reheating is possible. Further, the drain plug 22 is configured to open / close (up / down) the drain port 21 upon receiving transmission of the opening / closing driving force from the opening / closing drive mechanism 23, and the open / close driving mechanism 23 has its operating state (drain plug). A drain plug state detection sensor (not shown) for detecting whether 22 is in an open state or a closed state is installed, and the controller 5 controls the opening / closing drive mechanism 23 based on the output signal from this. . When the drain plug 22 is opened after bathing, the hot water in the bathtub 2 is discharged from the drainage part 331 of the drainage / collection part 33 described later to the bathtub pan, and subsequently drained from the drainage hole of the bathtub pan.

  The bathtub cleaning device 3 is installed for cleaning the inner wall surface of the bathtub 2 or the like. The bathtub cleaning device 3 includes a cleaning nozzle 31 installed on the bottom wall of the bathtub 2, a cleaning water supply path 32 for supplying cleaning water to the cleaning nozzle 31, and drainage attached to the drain outlet 21. In the middle of the cleaning water supply passage 32, the water storage tank 34 whose introduction end is communicated with the recovery portion 332 of the drainage / recovery portion 33, the circulation pump 35 interposed in the cleaning water supply passage 32, A detergent supply path 36 for supplying detergent, a detergent tank 37 for storing detergent to be supplied through the detergent supply path 36, and a detergent solenoid valve 38 for switching supply / stop of detergent from the detergent tank 37 are provided. ing. The upstream end of the cleaning water supply path 32 is connected to the outlet end portion 342 of the water storage tank 34, and the downstream end is connected to the cleaning nozzle 31. The wash water supply path 32 at a portion between the outlet end 342 of the water storage tank 34 and the circulation pump 35 has a downstream end of the hot water supply path 43 through, for example, a three-way connection joint 39 (for example, a cheese pipe joint). The hot water supply is possible from the heat source unit 4 to the washing water supply path 32 by being connected to join. In addition, a check valve 321 for preventing a back flow from the bathtub 2 side is interposed in the cleaning water supply path 32 at the upstream side position of the cleaning nozzle 31.

  The washing nozzle 31 is installed through the bottom wall of the bathtub 2 so that washing water is ejected from the front end opening (upper surface opening) toward the inner wall surface of the bathtub 2 with a predetermined range. Although only one cleaning nozzle 31 is shown in the figure, two or more cleaning nozzles 31 can be installed in parts other than the bottom wall according to the size of the bathtub 2 or the bathtub to be cleaned. In that case, the second and third cleaning water supply paths may be branched from the cleaning water supply path 32 toward the other cleaning nozzles.

The circulation pump 35 is constituted by, for example, a non-volumetric centrifugal pump, and in a stopped state, communication from the suction side to the discharge side allows passage of hot water. The circulation pump 35 is installed at a position above the bathtub pan and below the flange wall of the bathtub 2 so that drainage in the bathtub pan is not applied. In response to the operation control by the controller 5, the cleaning water and the like in the water storage tank 34 are supplied to the cleaning nozzle 31 by being turned ON / OFF for a predetermined time for the circulation cleaning of the bathtub 2. Further, the detergent supply path 36 is configured such that a predetermined amount of detergent is supplied from the detergent tank 37 in the middle of the cleaning water supply path 32 by opening the detergent electromagnetic valve 38 for a predetermined time, for example. The detergent tank 37 is provided with a float switch for detecting the liquid level of the detergent, and detects that the liquid level has dropped to a predetermined liquid level and outputs it to the controller 5.

Next, a collection set including the drainage / recovery unit 33 and the water storage tank 34 will be described with reference to FIGS. 2 and 3. In the collection set, the drainage / collection unit 33 is detachably connected to the introduction end 341 of the water storage tank 34 by means of, for example, a screw or a screw, and is integrated. This collection set is formed in a flat shape by, for example, synthetic resin molding so that the whole can be disposed in the gap between the bathtub 2 and the bathtub pan, except for the joint portion 343 of the outlet end portion 342. Then, a flat drainage / recovery unit 33 is connected to a flat water storage tank 34 having an L shape (see FIG. 2) in a plan view, thereby forming a J shape or a U shape in a plan view. Accordingly, at least the outlet end 342 is in the bathtub 2 (FIG. 2) in a state where the drainage / recovery unit 33 is fastened to the drainage port 21 of the bathtub 2 (for example, see FIG. 6) by screwing with the annular stopper 21a. So that the upstream end (the suction side of the circulation pump 35 ) of the washing water supply path 32 is connected to the joint portion 343 at the outer position of the bathtub 2. It has become.

  The drainage / recovery unit 33 (see FIG. 3) collects mainly the flush water from the bathtub 2 and the drainage unit 331 for draining mainly the bathtub water from the bathtub 2 to the outside of the flat main body 334. And a recovery unit 332 for performing the above operation. The main body 334 is formed with a receiving opening 335 that opens upward, a drain opening 333 that opens forward, and a recovery opening 336 that opens backward, and opens upwardly from the internal space toward the receiving opening 335. A small-diameter cylinder 337. A threaded portion is formed on the inner peripheral surface of the receiving port 335, and a retaining ring 21 a is screwed into the threaded portion from above the draining port 21 (see FIG. 6) and fastened, whereby the receiving port 335 is connected to the draining port 21. The drainage / recovery unit 33 is connected to the bathtub 2 in a state of being communicated.

  The small-diameter cylinder 337 is opened to a predetermined inner peripheral area including the central area in a plan view with respect to the receiving port 335 (drainage port 21), and the partition wall is communicated from the opening of the small-diameter cylinder 337 to the drainage opening 333. The drainage section 331 is configured by being partitioned by On the other hand, the small-diameter cylinder is such that the wash water that has flowed from the edge of the drain port 21 to the outer peripheral side region of the donut between the outer peripheral side of the small-diameter cylinder 337 and the inner peripheral side of the receiving port 335 is guided to the recovery opening 336. The collection portion 332 is configured by partitioning with a partition so that the outer periphery of 337 communicates with the collection opening 336. In other words, if the target is bath water of a certain level, such as drainage after bathing, the water pressure vigorously flows into the drain port 21 and enters the small-diameter cylinder 337 that opens to the inner peripheral side region. Therefore, drainage from the drainage part 331 becomes possible (see the solid line arrow in FIG. 3). On the other hand, in the case where the washing water after washing sprayed from the washing nozzle 31 and transferred from the inner wall surface of the bathtub 2 is targeted, it enters the outer peripheral side of the small-diameter tube 337 along the edge of the drain port 21. Thus, the collection by the collection unit 332 becomes possible (see the dashed line arrow in FIG. 3). Thereby, while using the same one drain outlet 21, the drainage / recovery unit 33 enables both the drainage of the bath water to the outside and the recovery of the wash water to the water storage tank 34. Reference numeral 338 denotes a guide cylinder, and the guide cylinder 338 is formed to pass an operating wire for transmitting an opening / closing driving force from the opening / closing driving mechanism 23 to the drain plug 22.

  In the above bathtub cleaning apparatus, after receiving a cleaning command input based on the ON operation of the cleaning switch of the cleaning remote controller 52, etc., the bathtub water in the bathtub 2 is drained or empty bath 2 for bathing. Bathtub cleaning control is executed by the controller 5 at a predetermined timing, such as before filling with hot water, and the bathtub cleaning operation is performed. That is, the controller 5 includes a preliminary rinse cleaning control unit, a circulation cleaning control unit including a detergent mixing processing unit and a bathtub cleaning processing unit, and a rinse cleaning control unit. Each process of rinsing and cleaning is executed. The bathtub washing operation is executed with the drain plug 22 left open. The outline of the bathtub cleaning operation will be described. First, as shown in FIG. 4, supply of hot water as rinsing water from the hot water supply path 43 to the cleaning water supply path 32 is started (step S1). And preliminary rinsing washing is performed for both the inside of the water storage tank 34 (step S2). When the preliminary rinsing cleaning is completed, the hot water supply from the hot water supply passage 43 is stopped (step S3), and then the circulation cleaning is executed (step S4). In the circulation cleaning, first, the detergent solenoid valve 38 is opened for a predetermined time to supply a predetermined amount of detergent to the cleaning water supply passage 32, and the circulation pump 35 is operated at a predetermined low rotational speed to reduce a predetermined set value. After the detergent mixing process is performed by circulating at a flow rate for a predetermined time, the circulation pump 35 is switched to the operation at a predetermined high rotation number, and the cleaning water after the detergent mixing is set from the water storage tank 34 to the cleaning nozzle 31. By supplying at a flow rate, cleaning water is sprayed from the cleaning nozzle 31 into the bathtub 2 to perform the bathtub cleaning process. When this circulation cleaning is completed, hot water is supplied again from the hot water supply path 43 to the cleaning water supply path 32 (step S5), and both the inside of the bathtub 2 and the water storage tank 34 are targeted as described above. Rinsing is performed (step S6). When this rinse cleaning is completed, the hot water supply from the hot water supply path 43 is stopped (step S7), and the process ends.

  In the preliminary rinsing cleaning (step S2) or rinsing cleaning (step S6), hot water from the hot water supply passage 43 is supplied to the three-way connection joint 39 of the cleaning water supply passage 32 as shown by a thick arrow in FIG. Then, the flow is divided by the three-way connection joint 39, part of which passes through the circulation pump 35 and the check valve 321 and is injected from the cleaning nozzle 31 to the bathtub 2, and the other part is supplied from the outlet end 342 to the water storage tank. It passes through 34 and backflows to the drainage / recovery part 33 and overflows from the drainage port 21 into the bathtub 2. Then, the rinsing hot water that has reached the tub 2 side through any path flows into the drainage section 331 of the drainage / recovery section 33 as indicated by the thick solid arrow in FIG. Water is drained from the drainage opening 333. That is, hot water is sprayed from the cleaning nozzle 31 toward the inner wall surface of the bathtub 2 and then reaches the drain port 21 along the inner wall surface (see the thick line arrow in FIG. 5). Since hot water flowing backward from the side of 332 also reaches the drain 21, hot water from both flows into the small-diameter tube 337 of the drainage portion 331 having the lowest resistance and is drained from the drain opening 333. Become. By the above preliminary rinsing cleaning, both the inside of the bathtub 2 and the water storage tank 34 can be preliminarily rinsed, and the time required for the preliminary rinsing can be reduced compared with the case where the inside of the bathtub 2 and the inside of the water storage tank 34 are separately performed. Shortening can be achieved. In this case, depending on whether the circulation pump 35 is in the activated state or inactivated state, the distribution is a ratio between the partial flow rate that reaches the bathtub 2 via the cleaning nozzle 31 and the partial flow rate that reaches the bathtub via the water storage tank 34. The ratio can be changed. Preferably, as a final process of preliminary rinsing, the water tank 34 may be divided at a larger flow rate.

  At the stage where the preliminary rinsing cleaning is completed, the water storage tank 34 is filled with hot water, and the amount of detergent set in advance so as to obtain a predetermined detergent concentration based on the amount of water stored in the water storage tank 34 in a full state is It is supplied from the detergent tank 37 by the detergent mixing unit. That is, the detergent electromagnetic valve 38 is opened for a supply time corresponding to the detergent amount, and the circulation pump 35 is operated so as to have a discharge flow rate of a preset small flow rate to execute the detergent mixing process. That is, the circulation pump 35 is operated at a predetermined small rotation speed corresponding to the discharge flow rate. Accordingly, as indicated by the one-dot chain line arrow in FIG. 7, the detergent from the detergent supply path 36 is joined while hot water in the water storage tank 34 flows to the cleaning nozzle 31 through the cleaning water supply path 32, and the detergent is mixed. The hot water (washing water) in the state of overflowing overflows from the washing nozzle 31 into the bathtub 2. The overflowing wash water flows to the drain port 21 (see also FIG. 6B), and this wash water is collected from the collection unit 332 of the drain / collection unit 33 to the water storage tank 34. By repeating this circulation at the set small flow rate, the detergent concentration of the washing water can be made uniform quickly. And although it will once come out to the external space in the bathtub 2 from the washing nozzle 31, since it is made to circulate by the setting small flow volume, it does not foam but maintains the state of the liquid state substantially, and detergent concentration Uniformity can be realized.

  Next, a bathtub cleaning process is performed by the bathtub cleaning processing unit using the cleaning water in the water storage tank 34 having a uniform detergent concentration. That is, the bath cleaning process is executed by operating the circulation pump 35 so that the discharge flow rate is set to a preset large flow rate so as to reach the inner wall surface of the bathtub 2 by spraying from the cleaning nozzle 31. As a result, as shown by the thick dashed arrows in FIG. 7, after the cleaning water in the water storage tank 34 is supplied to the cleaning nozzle 31 through the cleaning water supply path 32, the cleaning nozzle 31 is directed toward the inner wall surface of the bathtub 2. Be injected. The inner wall surface of the bathtub 2 is washed with the jetted washing water to wash off hot water, etc., and the washing water that has flowed along the inner wall surface flows from the drain port 21 into the collection unit 332 of the drainage / collection unit 33 (see FIG. 6 (b) (see the thick broken line), the water is collected in the water storage tank 34. By continuing this circulation for a predetermined time, the bathtub washing process in the circulation washing is completed.

  As the set large flow rate, a large flow rate value (for example, about 5 L / min) is set so that cleaning water is jetted from the cleaning nozzle 31 and reaches the inner wall surface (side wall surface) of the bathtub 2 at the time of bath cleaning. On the other hand, the set small flow rate is set to a flow rate value (for example, 1 L / min or less) of about 10 to 20% or less of the set large flow rate. As a result, the cleaning water supplied to the cleaning nozzle 31 at the set small flow rate during the detergent mixing process does not reach the inner wall surface of the bathtub 2 even if it flows out of the cleaning nozzle 31 and flows out of the cleaning nozzle 31. The cleaning water flows out on the bottom wall surface in the vicinity of the periphery of the cleaning nozzle 31 and reaches the drain port 21. According to the above setting, when the circulation pump 35 is operated at a rate of, for example, 5 L / min, similar to that at the time of washing the bathtub, the detergent mixing process takes about 2.5 minutes until the detergent concentration is uniformly mixed. On the other hand, when the circulating pump 35 was operated at the above-mentioned small set flow rate, for example, 1 L / min, the detergent concentration could be uniformly mixed in about 15 seconds from the start of the detergent mixing process. This is because when washing water is supplied to the washing nozzle 31 at a set large flow rate at the time of washing the bathtub, it takes time to flow down the inner wall surface to reach the drain port 21 after being sprayed to the inner wall surface of the bathtub 2. The foaming is caused by the collision between the jet and the inner wall surface, and the entire amount of the wash water jetted does not continuously reach the drain port 21 and is partially delayed, and it takes a long time to recover to the water storage tank 34. It is thought to become.

  And after this circulation washing | cleaning is complete | finished, a rinse washing | cleaning (step S6, S7) is performed at the end, and all the bathtub washing | cleaning driving | operations are completed. In the rinsing cleaning process in step S6, the hot water supply from the hot water supply path 43 to the cleaning water supply path 32 is continued until a predetermined rinsing cleaning time elapses, as in the case of the preliminary rinsing cleaning process. Thereby, similarly to the case of the preliminary rinsing cleaning process, the rinsing cleaning in both the water storage tank 34 and the bathtub 2 can be performed simultaneously.

<Other embodiments>
Note that the present invention is not limited to the above-described embodiment, but includes other various embodiments. That is, the detergent supply position is not limited to the middle of the cleaning water supply path 32, but instead, the downstream end of the detergent supply path 36 is communicated with the water storage tank 34, and the detergent from the detergent tank 37 is used. May be introduced into the hot water stored in the water storage tank 34, or the detergent supply path 36 may be disposed with the downstream end facing the bathtub 2 so that the detergent is introduced into the bathtub 2. Also good.

  Moreover, in each said embodiment, although the drainage / collection | recovery part 33 is used, if the opening (hole) for collection | recovery is provided in the bathtub 2 separately from the drainage port 21, it is for the collection | recovery. The water storage tank 34 may be communicated with and connected to the mouth.

  Instead of changing and switching the operating amount of the circulation pump 35 in order to switch the supply flow rate, such as supply at a set small flow rate during the detergent mixing process, or supply at a set large flow rate during the bathtub cleaning process. In addition, the circulation pump 35 can be operated at a constant operation amount in any processing, and the supply flow rate can be switched by a flow control valve additionally provided in the cleaning water supply path 32.

2 Bathtub 3 Bathtub cleaning device 5 Controller (Circulation cleaning control means, detergent mixing processing section)
31 Washing nozzle 32 Washing water supply path 34 Water storage tank 35 Circulation pump

Claims (2)

The cleaning water sprayed into the bathtub is collected and stored in a water storage tank, and the operation of the circulation pump sucks the cleaning water in the water storage tank and supplies it to the cleaning nozzle through the cleaning water supply path. A bathtub cleaning apparatus provided with a circulating cleaning control means for performing a bathtub cleaning process by circulating cleaning by spraying into the bathtub,
The circulating cleaning control means includes a detergent mixing processing unit for mixing detergent before executing the bath cleaning processing, and the detergent mixing processing unit stores water in a water storage tank by operating the circulating pump. The hot water is circulated between the hot water and the bathtub, while the hot water is supplied in the middle of or before circulation, and the detergent supply from the detergent tank is executed, and
The circulation cleaning control means controls the operation of the circulation pump so that cleaning water is circulated and supplied at a set large flow rate to the cleaning nozzle during the bath cleaning process, while the detergent mixing processing unit set set smaller than the flow rate that is configured to operate control the circulation pump at low flow rate,
Bath tank cleaning apparatus characterized by. The bathtub cleaning device according to claim 1 ,
As the set small flow rate, a flow rate value is set such that the hot water supplied with the detergent does not jump out of the washing nozzle into the air in the bathtub, and flows out from the washing nozzle onto the bottom wall surface of the bathtub, Cleaning device.

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