JP2017131407A - Bathroom washing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathroom washing apparatus capable of either properly dissolving or suppressing a trouble that a cleaning agent valve drops in a durability performance by causing a detergent valve to receive the influence of a negative pressure by a venturi part.SOLUTION: A bathroom washing apparatus A is equipped with a detergent valve Vb disposed in a detergent supply path 6 connected to a venture part 4. In the state where both a hot water valve and the detergent valve Vb are opened so that rinse water is ejected from a washing nozzle. When the ejection of washing nozzle is stopped in this state, the valve closing operation of the detergent valve Vb is executed in the delay to the valve closing operation of a hot water pouring valve.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bathroom cleaning apparatus.

The present applicant has previously proposed those described in Patent Documents 1 and 2 as specific examples of the bathroom cleaning apparatus.
In the bathroom cleaning apparatus described in these documents, for example, a cleaning nozzle is attached to the bottom of a bathtub, and a venturi section is provided in the middle of a hot water flow path connected to the cleaning nozzle. . A detergent supply path is connected to the venturi section. When hot water flows through the hot water flow path, a negative pressure is generated in the detergent supply path, whereby the detergent is smoothly supplied to the venturi section, and cleaning water in which the detergent and hot water are mixed is generated. This washing water is sprayed from the washing nozzle toward the bathtub, and the bathtub is washed.

  However, the prior art still has room for improvement as described below.

  In other words, the hot water flow path and the detergent supply path are provided with a hot water pouring valve and a detergent valve for switching hot water supply on / off and detergent supply on / off. Conventionally, when both the pouring valve and the detergent valve are opened and the washing operation of the bathtub is performed, when the washing operation is finished, the valve closing operation is simultaneously performed. It is the actual situation.

However, according to such an operation mode, the valve closing operation of the detergent valve is performed in a state where the negative pressure using the venturi is still generated, and the secondary pressure of the detergent valve is in the negative pressure state. is there. The valve closing operation in such a state may cause problems such as deterioration of the durability of the detergent valve.
As a specific example, as a detergent valve, a direct-acting electromagnetic on-off valve is generally used. When switching such a type of detergent valve from the valve open state to the valve closed state, if the secondary pressure is a negative pressure, the operating speed of the valve body at the time of closing the valve becomes high, and the valve body moves toward the valve seat. There is a risk of causing a phenomenon of frequent collisions. If such a phenomenon occurs, the rubber seal portion of the valve body is greatly damaged, and its durability life is shortened, causing leakage. In addition, when the valve body of the detergent valve comes into contact with the valve seat, there is a possibility that the valve body may be biased against the valve seat due to the influence of negative pressure.
When the bathroom cleaning device is for so-called business use such as a bathroom cleaning application in a nursing facility, for example, the frequency of bathroom cleaning is considerably higher than that for general households, and the number of times the detergent valve is opened and closed is repeated. There are many more. For this reason, it is hard to say that a conventional bathroom cleaning apparatus has a sufficiently excellent durability for such applications.

Japanese Patent No. 4075961 JP 2011-200300 A

The present invention has been conceived under the circumstances as described above, and appropriately eliminates the disadvantage that the detergent valve is affected by the negative pressure by the venturi portion and its durability performance is reduced, or An object of the present invention is to provide a bathroom cleaning device that can be suppressed.

  In order to solve the above problems, the present invention takes the following technical means.

  The bathroom cleaning apparatus provided by the present invention includes a pouring valve capable of switching on / off of hot water supply to a hot water flow channel connected to a cleaning nozzle, a midway of the hot water flow channel, and the hot water flow It is provided in a venturi section for mixing detergent with hot water flowing through the road to generate washing water, and a detergent supply path connected to this venturi section, and the supply of detergent to the venturi section can be switched on / off A bathroom cleaning apparatus, wherein both the pouring valve and the detergent valve are opened and the cleaning water is ejected from the cleaning nozzle. When the spraying is stopped, the valve closing operation of the detergent valve is executed with a delay from the valve closing operation of the pouring valve.

According to such a configuration, the following effects can be obtained.
That is, when stopping the ejection of cleaning water from the cleaning nozzle, when switching the detergent valve from the open state to the closed state, the pouring valve is already in the closed state, so the negative pressure using the venturi section The occurrence state of is canceled or weakened. Therefore, when the detergent valve performs the valve closing operation, it is possible to appropriately solve the problem caused by the secondary pressure being a negative pressure. As a specific example, when the detergent valve is closed, the valve body is restrained from strikingly colliding with the valve seat under the influence of negative pressure, and the damage to the valve body is eliminated. In addition, it is possible to eliminate the fact that the valve body strikes the valve seat due to negative pressure. As a result, it is possible to improve the durability and sealing performance of the detergent valve, and to make it suitable for uses with a high frequency of cleaning work in the bathroom of a nursing facility.

  In the present invention, preferably, the valve closing operation of the detergent valve is performed when a predetermined time elapses from the valve closing operation of the pouring valve.

  According to such a configuration, the detergent valve can be brought into the valve closed state at an appropriate timing by easy control.

  In the present invention, preferably, the predetermined time is equal to or longer than a required time until the secondary pressure of the detergent valve returns from a negative pressure state to a positive pressure state after the pouring valve is closed.

  According to such a configuration, it is ensured that the valve is closed in a situation where the detergent valve is not affected by the negative pressure by the venturi. The required time can be obtained by an experiment using a real object or a model thereof, simulation, or the like.

  In the present invention, it is preferable that the detergent valve is closed when the hot water flow rate in the hot water flow path is reduced to a predetermined amount or less after the pouring valve is closed. It is comprised so that it may be performed when a pressure rises more than predetermined pressure.

  Even in such a configuration, the valve closing operation of the detergent valve can be appropriately executed at the timing intended by the present invention.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a schematic explanatory drawing which shows an example of the bathroom cleaning apparatus which concerns on this invention. It is a principal part schematic explanatory drawing of FIG. (A), (b) is a time chart which shows the operation example of the bathroom washing apparatus shown in FIG.

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

  The bathroom cleaning apparatus A shown in FIG. 1 is configured as a bathtub cleaning apparatus for cleaning the bathtub 1. Specifically, the bathroom cleaning apparatus A is provided with a cleaning nozzle 2 attached to the bottom of the bathtub 1, a hot water flow path 3 connected to the cleaning nozzle 2, the hot water flow path 3, and the cleaning nozzle 2. A hot water supply valve Va for switching on / off of hot water supply, a venturi section 4 provided in the middle of the hot water flow path 3, a detergent supply path 6 for supplying detergent from the detergent tank 5 to the venturi section 4, A detergent valve Vb for switching the detergent supply to the venturi section 4 on and off, and a control section 7 for performing opening / closing control of the detergent valve Vb and the pouring valve Va are provided in the detergent supply path 6. ing.

  Hot water can be supplied to the hot water channel 3 from a hot water supply device (not shown) or a hot water supply source such as a water pipe. Further, the hot water flow path 3 is appropriately provided with a flow rate sensor S and a flow rate adjustment valve Vc, and the valve opening degree of the flow rate adjustment valve Vc is controlled based on a detection value by the flow rate sensor S. The venturi section 4 is configured as shown in FIG. 2, and has a throttle section 41 that partially throttles the flow path 40 whose both ends are connected to the hot water flow path 3, and a continuous section that crosses and connects the throttle section 41. The passage 42 is provided, and negative pressure is generated in the communication passage 42 when hot water flows through the throttle portion 41 at a high speed. The communication path 42 constitutes a part of the detergent supply path 6. For this reason, the detergent smoothly flows into the venturi section 4 from the detergent supply path 6 by the action of the negative pressure, and washing water in which the detergent and hot water are mixed is generated.

  The detergent valve Vb is a direct-acting electromagnetic on-off valve described in, for example, Japanese Patent Laid-Open No. 9-60758, and the valve element 82 facing the valve opening 80 and the valve seat 81 formed around the valve opening 80 is a valve. The valve body 82 is configured to be freely reciprocated by being driven in the chamber 83 and driven by a solenoid 84. The valve body 82 has a rubber seal portion 82a that faces the valve seat 81 when the valve is closed. The primary side flow path 88 </ b> A of the detergent valve Vb is connected to the detergent tank 5, and the secondary side flow path 88 </ b> B is connected to the inside of the venturi unit 4. Accordingly, when hot water is flowing through the venturi section 4, the secondary pressure P2 of the detergent valve Vb is a negative pressure. On the other hand, the pouring valve Va is, for example, a pilot type electromagnetic on-off valve.

The control unit 7 is configured to perform control as shown in FIG. 3 when starting and ending the cleaning operation of ejecting cleaning water from the cleaning nozzle 2 toward the bathtub 1.
That is, when the cleaning operation is started, the pouring valve Va is first opened (time t1), and the detergent valve Vb is opened when a predetermined time T1 has passed thereafter. The valve operation control at the start of the cleaning operation is not a direct technical object of the present invention. For example, the pouring valve Va and the detergent valve Vb may be opened simultaneously.
On the other hand, when the cleaning operation is finished, first, the pouring valve Va is closed (time t2), and the detergent valve Vb is closed when a predetermined time T2 has passed thereafter. Preferably, the predetermined time T2 is equal to or longer than the time required for the secondary pressure P2 of the detergent valve Vb to return from the negative pressure state to the positive pressure state after the pouring operation of the pouring valve Va, for example 0.5 About seconds.

  According to the bathroom cleaning apparatus A described above, the following operation is obtained.

  First, in a cleaning operation state in which both the pouring valve Va and the detergent valve Vb are opened and the cleaning water is ejected from the cleaning nozzle 2, the cleaning operation will be described with reference to FIG. As described above, the detergent valve Vb is delayed from the pouring valve Va and is closed. For this reason, the secondary pressure P2 of the detergent valve Vb shown in FIG. 2 is in a state in which the negative pressure is eliminated.

  Unlike the present embodiment, if the secondary pressure P2 is a negative pressure, the speed when the valve body 82 descends toward the valve seat 81 becomes high, and the valve body 82 and the valve seat 81 are strong. Due to the contact, the rubber seal portion 82a of the valve body 82 is greatly damaged. Further, when the detergent in the valve chamber 83 passes through the valve opening 80 and flows into the secondary flow path 88B, the flow velocity V1 of the detergent in the region close to the primary flow path in the valve chamber 83 is Is much faster than the detergent flow velocity V2 in the opposite region. For this reason, the valve body 82 may be attracted in the direction indicated by the arrow Na, and the valve body 82 may be biased against the valve seat 81. On the other hand, according to the present embodiment, it is possible to appropriately eliminate the above-described problems, and it is possible to make the durability performance and the sealing performance of the detergent valve Vb excellent.

  Since the detergent inflow operation to the hot water flow path 3 is performed using the negative pressure by the venturi section 4, the detergent valve Vb is still open during the predetermined time T2 after the pouring valve Va is closed. Even if it is in a state, the inflow of the detergent into the hot water channel 3 is prevented at the time when the negative pressure generation state by the venturi part 4 is eliminated. Therefore, there is no problem that the detergent flows excessively into the hot / cold water channel 3.

In the present invention, the above-described bathroom cleaning apparatus A can be configured to execute the following first and second operation controls as operation controls different from those described above.
In the first operation control, the hot water flow rate in the hot water flow path 3 detected by the flow rate sensor S is changed after the pouring valve Va is closed to end the operation of ejecting the cleaning water from the cleaning nozzle 2. When the amount decreases below the predetermined amount, the detergent valve Vb is closed. The hot water flow rate in the hot water flow channel 3 and the negative pressure generated by the venturi unit 4 are in a corresponding relationship, and when the hot water flow rate is reduced below a predetermined amount, the negative pressure generation state by the venturi unit 4 is eliminated. It can be considered as a thing. Therefore, the operation intended by the present invention can also be obtained by the first operation control described above.

  In the second operation control, the secondary pressure P2 of the detergent valve Vb is configured to be detected using a pressure sensor (not shown), and the washing water ejection operation from the washing nozzle 2 is terminated. Therefore, after the pouring valve Va is closed, the detergent valve Vb is closed when the value of the secondary pressure P2 detected by the pressure sensor rises above a predetermined pressure. According to such a configuration, since the secondary pressure P2 is directly detected, it is further ensured that the detergent valve Vb performs the valve closing operation when the secondary pressure P2 is not negative.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the bathroom cleaning apparatus according to the present invention can be varied in design in various ways within the intended scope of the present invention.

The pouring valve and the detergent valve are not necessarily limited to electromagnetic valves, and other types of valves can also be used. When a valve that causes a malfunction when the valve closing operation is performed when the secondary pressure is in a negative pressure state as a detergent valve, the present invention can be applied to suitably solve the malfunction. It is.
The object to be cleaned by the bathroom cleaning apparatus according to the present invention is not limited to a bathtub, and other than this, for example, a bathroom floor, a side wall, a ceiling, a bathtub lid, and the like can be used.

A Bathroom cleaning device Va Pouring valve Vb Detergent valve 2 Cleaning nozzle 3 Hot water flow path 4 Venturi section 6 Detergent supply path

Claims (4)

A pouring valve provided in a hot water flow path connected to the washing nozzle and capable of switching on / off of the supply of hot water to the washing nozzle;
A venturi section that is provided in the hot water flow path and for generating washing water by mixing detergent in the hot water; and
A detergent valve provided in the detergent supply path connected to the venturi section and capable of switching on and off the supply of the detergent to the venturi section;
A bathroom cleaning device comprising:
In a state where both the pouring valve and the detergent valve are in the open state and the washing water is ejected from the washing nozzle, when the ejection of the washing water is stopped, the valve closing operation of the detergent valve is A bathroom cleaning apparatus, wherein the bathroom cleaning apparatus is configured to be executed after a closing operation of a pouring valve. The bathroom cleaning device according to claim 1,
The bathroom cleaning device is configured to perform the valve closing operation of the detergent valve when a predetermined time has elapsed since the valve closing operation of the pouring valve. The bathroom cleaning device according to claim 2,
The bathroom cleaning apparatus, wherein the predetermined time is equal to or longer than a required time until the secondary pressure of the detergent valve returns from a negative pressure state to a positive pressure state after the pouring valve is closed. The bathroom cleaning device according to claim 1,
The valve closing operation of the detergent valve is performed when the hot water flow rate in the hot water flow passage decreases below a predetermined amount after the valve closing operation of the pouring valve, or the secondary pressure of the detergent valve increases above a predetermined pressure. A bathroom cleaning device that is configured to be performed at the time.

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