JPH04156817A - Automatic bathtub washing device - Google Patents

Abstract

PURPOSE:To effectively washing the bathtub bottom prior to hot water feed for bathing by opening a hot water feeding opening/closing valve with a water exhaust opening/closing valve in closed state, supplying a certain amount of hot water, then opening the water exhaust valve, and discharging contaminants, etc., together with the hot water. CONSTITUTION:When a switch for supplying hot water for washing is turned on, a water exhaust opening/closing valve 31 is opened, and the remaining water in a bathtub 1 is discharged from an exhaust pipe 31. After elapse of a certain while, the exhaust opening/closing valve 31 is closed, and a trapping opening-closing valve 19 is opened. Hot water flows from a hot water feeding circuit 3 to an additional boiling circuit 2, and is passed through a heat exchanger 6 for bath and a forward pipe 2 and dropped to the bathtub 1 from a bath adapter 4. When the amount of fed hot water counted by a flow sensor 17 attains a specified value, the trapping valve 19 is closed, and the exhaust valve 31 is opened. Thus, contaminants or hairs remaining at the bathtub bottom are discharged together with the hot water from the exhaust pipe 32, and the bathtub bottom is turned clean.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an automatic bathtub cleaning device.

(Prior Art) Conventionally, as an automatic bathtub cleaning device, for example, Japanese Patent Application Laid-Open No. 2-57
There is one shown in Publication No. 857.

In this device, before hot water is supplied for bathing or bathing, the drain valve of the bathtub is opened and the hot water supply valve is opened to wash the bottom of the bathtub.

(Problem to be Solved by the Invention) However, in the conventional automatic bathtub cleaning device described above, hot water is supplied for cleaning with the drain valve open. It is necessary to set the position and the hot water supply position via the hot water supply valve at remote positions from each other, which is subject to restrictions on construction conditions.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and provides a bathtub cleaning device that can efficiently clean the bottom of the bathtub before hot water is supplied for bathing and is not subject to restrictions on construction conditions. It is an object.

(Example) An example of the present invention will be specifically described with reference to the drawings. FIG. 1 is an overall configuration diagram of an automatic bathtub cleaning device of the present invention.

In Fig. 1, ■ is a bathtub, 2 is a reheating circuit for circulating and reheating the hot water in the bathtub 1, and a return pipe 2a
and a return pipe 2b. 3 is a hot water supply circuit for dropping hot water into the bathtub 1, and the hot water supply circuit 3 is connected to the bath adapter 4 of the bathtub 1 via the reheating circuit 2. The reheating circuit 2 is connected to the bathtub 1,
The reheating circuit 2 is provided with a pump 5 for forced circulation of hot water in the bathtub 1, a bath heat exchanger 6 for heating the hot water, and a pressure sensor 7 for detecting the water level in the bathtub 1. The hot water supply circuit 3 is connected from city water to the reheating circuit 2 via the hot water supply heat exchanger IO, and the water supply 1 branch circuit 11 is branched from the downstream side of the hot water supply heat exchanger IO of the hot water supply circuit 3. ing. This hot water supply branch circuit 11 is connected to a shower, a stove, etc., and supplies hot water to these devices. On the upstream side of the hot water supply heat exchanger IO in the hot water supply circuit 3,
An inflow flow rate sensor 12 for detecting the inflow flow rate from city water and a thermistor 13 for detecting water temperature are provided.
Between the hot water supply heat exchanger IO and the hot water supply branch circuit 11, a flow rate adjustment valve 14 for adjusting the incoming water flow rate and a thermistor 15 for detecting the outlet temperature of the hot water supply heat exchanger 10 are provided. Furthermore, on the downstream side of the hot water supply branch circuit II,
Flow to control the drop flow rate! A regulating valve 16, a drop-in flow rate sensor 17 for detecting the flow rate dropped into the bathtub l, a vacuum breaker 18, a drop-in opening/closing valve 19 for opening and closing the hot water supply circuit 3, and a check valve 20 are provided. Further, 32 is a drain pipe connected to the bottom of the bathtub 1, and the drain pipe 31 has a drain opening/closing valve 31.
is provided.

Next, the operation of the automatic bathtub cleaning device during bathtub cleaning and hot water supply (overcharging) will be explained based on the flowchart shown in FIG. 2.

The cleaning hot water switch of the operating device (not shown) is turned on (S
1), the drainage on-off valve 31 is opened (S2). Remaining water in the bathtub 1 is drained from a drain pipe 31. When the predetermined time required for the remaining water to drain has passed (S3), the drain on-off valve 31 is closed (S4), and the drop-in on-off valve 1
9 is opened (S5). Hot water flows from the hot water supply circuit 3 into the reheating circuit 2, and then to the bath heat exchanger 6 and the outgoing pipe 2b.
It is dropped from the bath adapter 4 into the bathtub l through the bath adapter 4. Next, the flow rate sensor 17 detects and counts (
When the accumulated hot water supply amount reaches a predetermined amount necessary to fill the bottom of the bathtub with hot water (S6), the drop-in opening/closing valve 19 is closed (S7). Subsequently, the drainage on-off valve 31 is opened (S8), and dirt, hair, etc. remaining at the bottom of the bathtub are discharged from the drain pipe 32 along with the hot water, and the bottom of the bathtub is cleaned. Next, when the predetermined time required to drain the hot water at the bottom of the bathtub has elapsed (S9), the drain on-off valve 31 is opened (SI
O), the cleaning operation ends. According to this cleaning operation, the position of the bath adapter 4 (hot water supply position) and the position I of the drain pipe 32 are
! Dirt, etc. at the bottom of the bathtub can be efficiently drained without having to set the drainage position (drainage position) to a remote position.

Next, the drop-in on-off valve 19 is opened (S11),
As described above, hot water is dropped into the bathtub l from the bath adapter 4. When the amount of hot water detected and counted (integrated) by the flow rate sensor 17 reaches a predetermined amount necessary to bring the water level in the bathtub 1 to the set water level (S12), the drop-in opening/closing valve 19 is closed and the hot water is supplied. The operation ends.

(Effects of the Invention) As is clear from the embodiments described above, the automatic bathtub cleaning device of the present invention includes a hot water supply circuit that drops hot water into the bathtub, a hot water supply on/off valve interposed in the hot water supply circuit, and a hot water supply on/off valve installed at the bottom of the bathtub. In a device equipped with a drain pipe that is connected to a drain pipe and has a drain on-off valve interposed therein, the drain on-off valve is opened and the remaining hot water is drained before hot water is supplied for bathing, and then the drain pipe is opened. In this state, the on-off valve for hot water supply is opened to supply a predetermined amount of hot water, and then the drain valve is opened to discharge dirt, etc. along with the hot water.
The bottom of the bathtub can be efficiently cleaned without having to set the hot water supply position and the water drainage position at remote positions, as in the past, and there are no restrictions on construction.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIG. 2 is a sequence flowchart showing one embodiment of the present invention. 1... Bathtub 3... Hot water supply circuit 19... Hot water supply on-off valve 31... Drainage on-off valve 32... Drain pipe

Claims (1)

[Claims] For bathing, a bathtub is equipped with a hot water supply circuit that drops hot water into the bathtub, a water supply on-off valve installed in the hot water supply circuit, and a drain pipe connected to the bottom of the bathtub and equipped with a drainage on-off valve. Before supplying hot water, open the drain on-off valve to drain the remaining hot water, open the hot water on-off valve with the drain on-off valve closed to supply a predetermined amount of hot water, and then open the drain valve.
An automatic bathtub cleaning device characterized by discharging dirt, etc. along with hot water.