JP6732209B2 - Bathroom cleaning equipment - Google Patents

Description

The present invention relates to a bathroom cleaning device.

The present applicant has previously proposed, as a specific example of the bathroom cleaning device, those described in Patent Documents 1 and 2.
In the bathroom washing devices described in these documents, for example, a washing nozzle is attached to the bottom of a bathtub, and a venturi portion is provided in the hot water passage connected to the washing nozzle. .. A detergent supply path is connected to the venturi portion. When the hot water flows in the hot water flow path, a negative pressure is generated in the detergent supply path, so that the detergent is smoothly supplied to the venturi portion, and wash water in which the detergent and hot water are mixed is generated. This cleaning water is sprayed from the cleaning nozzle toward the bath to clean the bath.

However, in the above-mentioned conventional technique, there is still room for improvement as described below.

That is, the hot water flow passage and the detergent supply passage are provided with a pouring valve and a detergent valve for turning on/off the hot water supply and switching on/off the detergent supply. Conventionally, when both the pouring valve and the detergent valve are opened and the bathtub is being washed, when the washing work is finished, the valve closing operation is performed at the same time. It is the actual situation.

However, according to such an operation mode, the valve closing operation of the detergent valve is performed while the negative pressure using the venturi portion 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 a defect such as deterioration of durability of the detergent valve.
As a specific example, as the detergent valve, a direct-acting electromagnetic on-off valve is generally used. When the detergent valve of this type is switched 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 valve closing becomes high, and the valve body pushes toward the valve seat. There is a risk of causing a phenomenon of frequent collision. If such a phenomenon occurs, the rubber seal portion of the valve body will be seriously damaged, shortening its durable life and causing leakage. Further, when the valve element of the detergent valve comes into contact with the valve seat, there is a possibility that the valve element may be abutted against the valve seat due to the influence of negative pressure.
When the bathroom cleaning device is used for so-called commercial use such as bathroom cleaning in a nursing facility, the frequency of bathroom cleaning is considerably higher than that for general household use, and the number of times the detergent valve is opened/closed is repeated. Much more. For this reason, it is hard to say that the conventional bathroom cleaning device has sufficiently excellent durability for such an application.

Japanese Patent No. 4075961 JP, 2011-200300, A

The present invention has been devised under the circumstances as described above, and properly eliminates the problem that the detergent valve is affected by the negative pressure of the venturi portion and its durability is lowered, or It is an object of the present invention 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 device provided by the present invention is provided in a hot and cold water flow path connected to a cleaning nozzle, and a pouring valve capable of switching on and off the supply of hot and cold water to the cleaning nozzle, and the hot and cold water flow path. The venturi portion is provided for mixing the detergent with the hot water to generate the wash water, and the detergent supply path connected to the venturi portion is provided, and the supply of the detergent to the venturi portion is turned on/off. A switchable detergent valve , wherein the detergent valve has a valve body located on a primary side of a valve opening for allowing detergent to pass therethrough facing a valve seat around the valve opening. 1. A bathroom cleaning device, which is reciprocally movable and is an opening/closing valve whose secondary pressure becomes negative when hot water passes through the hot water flow passage , wherein both the pouring valve and the detergent valve are opened. When the washing water is jetted from the washing nozzle when the jetting of the washing water is stopped, the valve closing operation of the detergent valve is executed after the valve closing operation of the pouring valve is delayed. It is characterized by being configured as described above.

With such a configuration, the following effects can be obtained.
That is, when the spray of cleaning water from the cleaning nozzle is stopped, when the detergent valve is switched from the open state to the closed state, the pouring valve is already closed. The state of occurrence of is eliminated or weakened. Therefore, when the detergent valve performs the valve closing operation, it is possible to appropriately eliminate the problem caused by the negative pressure of the secondary pressure. As a specific example, it is possible to prevent the valve body from being violently collided with the valve seat under the influence of negative pressure during the valve closing operation of the detergent valve, and to prevent the valve body from being greatly damaged. In addition, it is possible to prevent the valve element from being abutted against the valve seat due to the negative pressure. As a result, it becomes possible to improve the durability and sealing performance of the detergent valve, and to make it suitable for use in a bathroom of a nursing facility where the cleaning work is frequently performed.

In the present invention, preferably, the valve closing operation of the detergent valve is configured to be executed when a predetermined time has elapsed from the valve closing operation of the pouring valve.

With such a configuration, the detergent valve can be closed at an appropriate timing by easy control.

In the present invention, preferably, the predetermined time period is set to a time period required for the secondary pressure of the detergent valve to return from a negative pressure state to a positive pressure state after the valve closing operation of the pouring valve.

With such a configuration, it is ensured that the detergent valve performs the valve closing operation in a situation where the detergent valve is not affected by the negative pressure of the venturi portion. The required time can be obtained by an experiment using a real thing or its model, or a simulation.

In the present invention, preferably, the valve closing operation of the detergent valve is performed after the valve closing operation of the pouring valve, at a time point when the flow rate of hot and cold water in the hot and cold water flow passage is reduced to a predetermined amount or less, or the secondary of the detergent valve. It is configured to be executed when the pressure rises above a 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 the embodiments of the 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 cleaning apparatus shown in FIG.

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

The bathroom cleaning device A shown in FIG. 1 is configured as a bath cleaning device for cleaning the bath 1. Specifically, this bathroom cleaning device A is provided with a cleaning nozzle 2 attached to the bottom of a bathtub 1, a hot and cold water flow path 3 connected to this cleaning nozzle 2, a hot water and water flow path 3, and a cleaning nozzle 2. A pouring valve Va for switching the hot and cold water supply on and off, a venturi section 4 provided in the hot and cold water flow path 3, and 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 portion 4 on/off, and a control portion 7 for executing 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 flow path 3 from a hot water supply device (not shown) or a hot water supply source such as a water pipe. A flow rate sensor S and a flow rate adjusting valve Vc are appropriately provided in the hot and cold water flow path 3, and the valve opening degree of the flow rate adjusting valve Vc is controlled based on the value detected by the flow rate sensor S. The venturi portion 4 has a structure as shown in FIG. 2, and has a throttle portion 41 in which both ends thereof are connected to the hot and cold water passage 3 and the passage portion 40 is partially narrowed. And a passage 42, and a negative pressure is generated in the communication passage 42 by the hot water flowing through the throttle portion 41 at a high speed. The communication passage 42 constitutes a part of the detergent supply passage 6. Therefore, the negative pressure causes the detergent to smoothly flow into the venturi portion 4 from the detergent supply passage 6, 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 Unexamined Patent Publication No. 9-60758, and a valve body 82 facing a valve opening 80 and a valve seat 81 formed around the valve opening 80 is a valve. The valve body 82 is arranged in the chamber 83 and is reciprocally movable by driving the solenoid 84. The valve body 82 has a rubber seal portion 82a that makes face-to-face contact with the valve seat 81 when the valve is closed. The primary side flow passage 88A of the detergent valve Vb is connected to the detergent tank 5, and the secondary side flow passage 88B is connected to the inside of the venturi portion 4. Therefore, when hot water is flowing through the venturi portion 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 opening/closing valve.

The control unit 7 is configured to perform the control shown in FIG. 3 when starting and ending the cleaning operation for ejecting cleaning water from the cleaning nozzle 2 toward the bath 1.
That is, when the cleaning operation is started, first, the pouring valve Va is opened (time t1), and the detergent valve Vb is opened after a predetermined time T1 has elapsed. The valve operation control at the start of the cleaning operation is not a direct technical object of the present invention, and for example, the pouring valve Va and the detergent valve Vb may be opened simultaneously.
On the other hand, when finishing the cleaning operation, first, the pouring valve Va is closed (time t2), and the detergent valve Vb is closed after a predetermined time T2 has elapsed. 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 closing operation of the pouring valve Va, for example, 0.5. It is about a second.

According to the bathroom cleaning device A described above, the following effects can be obtained.

First, when the pouring valve Va and the detergent valve Vb are both in the open state and the washing operation is in a state where the washing water is jetting from the washing nozzle 2, the washing operation is finished will be described with reference to FIG. As described above, the detergent valve Vb is delayed from the pouring valve Va to be in the valve closed state. Therefore, the negative pressure of the secondary pressure P2 of the detergent valve Vb shown in FIG. 2 is released.

Unlike the present embodiment, if the secondary pressure P2 is a negative pressure, the speed at which the valve body 82 descends toward the valve seat 81 becomes high, and the valve body 82 and the valve seat 81 become 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 flows through the valve opening 80 into the secondary side flow passage 88B, the detergent flow velocity V1 in the region near the primary side flow passage in the valve chamber 83 is Is considerably higher than the detergent flow rate V2 in the opposite region. For this reason, the valve body 82 may be pulled in the direction indicated by the arrow Na, and the valve body 82 may abut against the valve seat 81. On the other hand, according to the present embodiment, it is possible to appropriately eliminate the above-mentioned problems, and it is possible to improve the durability performance and the sealing performance of the detergent valve Vb.

Since the detergent inflow operation into the hot and cold water flow path 3 is performed by using the negative pressure of the venturi portion 4, the detergent valve Vb is still opened during the predetermined time T2 after the pouring valve Va is closed. Even in the state, the detergent is prevented from flowing into the hot and cold water flow path 3 at the time when the negative pressure generation state by the venturi portion 4 is eliminated. Therefore, there is no problem that the detergent excessively flows into the hot water flow passage 3.

In the present invention, the above bathroom cleaning device A may be configured to execute the following first and second operation controls as operation controls different from the above.
In the first operation control, the pouring water Va in the hot water flow passage 3 detected by the flow sensor S is detected after the pouring valve Va is closed in order to end the operation of ejecting the wash water from the cleaning nozzle 2. When the amount of water drops below a predetermined amount, the detergent valve Vb is closed. There is a correspondence relationship between the hot water flow rate in the hot water flow path 3 and the negative pressure generated by the venturi section 4, and when the hot water flow rate decreases below a predetermined amount, the negative pressure generation state by the venturi section 4 is eliminated. It can be thought of as something. Therefore, the operation intended by the present invention can be obtained also 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 jetting operation of washing water from the washing nozzle 2 is ended. 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 to cause the detergent valve Vb to perform the valve closing operation in the state where the secondary pressure P2 is not a negative pressure.

The present invention is not limited to the contents of the above-mentioned embodiment. The specific configuration of each part of the bathroom cleaning device according to the present invention can be modified in various ways within the scope intended by the present invention.

The pouring valve and the detergent valve are not necessarily electromagnetic valves, and other types of valves can be used. When the present invention is applied to a detergent valve that is defective when the valve closing operation is performed when the secondary pressure is in the negative pressure state, applying the present invention makes it possible to suitably eliminate the above-mentioned defect. Is.
The cleaning target of the bathroom cleaning device according to the present invention is not limited to the bathtub, but may be, for example, a floor surface, a side wall surface, a ceiling, a bathtub lid, or the like of the bathroom.

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 and cold water flow path connected to the washing nozzle and capable of switching on and off the supply of hot and cold water to the washing nozzle,
A venturi part provided in the hot water flow path and for generating wash water by mixing a detergent with the hot water.
A detergent valve provided in a detergent supply path connected to the venturi portion and capable of switching on/off the supply of the detergent to the venturi portion,
Equipped with a,
In the detergent valve, a valve body located on a primary side of a valve opening for allowing detergent to pass is reciprocally movable so as to face a valve seat around the valve opening, and A bathroom cleaning device, which is an opening/closing valve whose secondary pressure becomes negative when hot water passes through ,
In the state where both the pouring valve and the detergent valve are opened and the washing water is jetted from the washing nozzle, when the jetting of the washing water is stopped, the valve closing operation of the detergent valve is A bathroom cleaning device, characterized in that it is configured to be executed after a delay of the pouring valve closing operation. The bathroom cleaning device according to claim 1,
The bathroom cleaning device is configured such that the valve closing operation of the detergent valve is executed when a predetermined time has elapsed from the valve closing operation of the pouring valve. The bathroom cleaning device according to claim 2,
The bathroom cleaning device is set such that the predetermined time is equal to or longer than a time required for the secondary pressure of the detergent valve to return 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 flow rate of hot and cold water in the hot and cold water flow passage is reduced to a predetermined amount or less after the valve closing operation of the pouring valve, or the secondary pressure of the detergent valve is increased to a predetermined pressure or more. A bathroom cleaning device that is configured to run at the point of time.

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