JPH0591951A - Recovering method for warm water in bathtab - Google Patents

Abstract

(57) [Summary] [Purpose] By operating the pump after a lapse of time when the air remaining in the pipeline between the auxiliary bath and the pump escapes,
Efficiently collect overflowing hot water. [Composition] The mini tank water level switch 9 is turned on by the hot water overflowing from the bath tub 2 to turn on the mini tank circulation valves 27, 2.
8 is switched and after the hot water recovery path is formed, a time is provided for the air to escape from the hot water recovery path, and after this time has elapsed, the non-self-priming pump 29 is operated. [Effect] Since it is possible to prevent the hot water recovery pump from idling due to the trapping of air, it is possible to efficiently recover hot water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting hot water in a bathtub.

[0002]

2. Description of the Related Art In recent years, a bath apparatus in which a water heater, particularly a fully automatic water heater is connected to a bath to supply hot water is becoming widespread. Bathtubs applied to such bath equipment include
There is a so-called overflow bath with an auxiliary bath that collects the overflowing hot water by supplying hot water to the overflow. The overflow bath has an operation function of causing hot water to overflow into the auxiliary bath and circulating it, and an operation function of not using the auxiliary bath, and any of the operation functions can be selectively executed. Of these, when driving without using the auxiliary bathtub is selected, hot water overflows when a person takes a bath, and if hot water remains in the auxiliary bathtub, it is very unsightly. As a result, the auxiliary bath water level switch is turned on and the pump is operated to collect the overflowed warm water.

[0003]

However, as described above, when a large amount of warm water flows from the bathtub into the auxiliary bath and the water level switch is turned on, and the pump is immediately actuated, in the pipeline between the auxiliary bath and the pump. Since air remains in
The residual air causes the pump to idle, making it difficult to collect hot water. The present invention has been made in order to solve such a problem, and by operating the pump after a lapse of time when the air remaining in the pipeline between the pumps from the auxiliary tub elapses, the overflowed hot water can be efficiently removed. It is an object of the present invention to provide a method for collecting hot water in a bathtub, which is designed to be collected in.

[0004]

In order to solve such a problem, the present invention provides a water level switch in an auxiliary bath for receiving overflowing hot water, and reaches the sub tank from the auxiliary bath via an auxiliary bath circulation valve and a hot water recovery pump. In a bathtub with a hot water recovery route connected, when hot water overflows from the bath to the auxiliary bath, the auxiliary bath circulation valve is switched by turning on the water level to form a hot water recovery route, and the hot water recovery pump is activated after a lapse of a predetermined time. Then, the hot water in the auxiliary bath is recovered, the hot water recovery pump is stopped when the water level is switched off, and the hot water recovery path is maintained for a certain period of time.

[0005]

[Function] When hot water overflows from the bathtub to the auxiliary bathtub, hot water accumulates in the auxiliary bathtub. Then, the water level switch is turned on, the auxiliary bath circulation valve is switched, and the hot water recovery path is formed. In this state, the hot water recovery pump is not in operation yet. The air remaining in the pipeline from the auxiliary bath to the hot water recovery pump escapes to the auxiliary bath side through the pipeline, and the pipeline is filled with hot water. Next, the hot water recovery pump is activated,
The warm water in the auxiliary bath is sucked to the sub tank side through the pipe and stored in the sub tank. As the collection of hot water proceeds, the water level of the hot water in the auxiliary bath drops, so the water level switch turns off and the hot water recovery pump stops.

[0006]

EXAMPLE A bath apparatus for carrying out the method for collecting hot water of a bath according to the present invention will be described in detail below with reference to an example. In FIG. 1, reference numeral 1 indicates a bath apparatus for carrying out the method for collecting hot water of a bath according to the present invention. The bath device 1 includes a bathtub 2, a water heater 3, a sub tank unit 4, a circulation return pipe 5, and an additional heating return pipe 6.
And the additional heating pipe 7 is connected.
The bathtub 2 is a so-called overflow bathtub in which hot water is fully supplied and overflowed, and an auxiliary bathtub for collecting the overflowed hot water, that is, a minitank 8 is additionally provided. The mini tank 8 is provided with a mini tank water level switch 9, and a hot water recovery path (described later) is formed based on a detection signal of the mini tank water level switch 9. The inner wall of the bathtub 2 is provided with a nozzle unit 10 that takes in air and supplies air bubbles into the bathtub 2 together with the hot water when hot water is supplied. Further, bubbles that provide a bubble bath from the bottom of the bathtub 2 are provided. A bath unit 11 is provided. The hot water supply device 3 includes a hot water supply heat exchanger 12, an additional heating heat exchanger 13, and a filter 14 upstream of the additional heating heat exchanger 13. The water heater 3 includes a mixing valve 16 in which a water supply pipe 15 branched upstream of the heat exchanger 12 for hot water supply and a downstream side of the heat exchanger 12 for hot water supply are joined together, an atmosphere open tank 17, and pouring water. Additional heating switching valve 18, additional heating pump 19, flow path switching valve 20, filter 14, water amount control valve 23, additional heating heat exchanger 13, filtration valve 21, bubble pump 22, additional heating pipe 7,
A pouring path to the bathtub 2 through the additional heating return pipe 6 is formed by an appropriate control means. Further, the water heater 3 includes the sub tank bath air purge valve 34, the sterilization lamp 35, the additional heating return pipe 6, and the pouring additional heating switching valve 1 from the bath 2.
8, Filter 1 via reheating pump 19 and flow path switching valve 20
4 to heat exchanger 13 for additional heating, filter valve 21, bubble pump 2
An additional heating route is formed through the additional heating pipe 7 to the bathtub 2 via the additional heating pipe 2. Furthermore, the water heater 3
Through the circulation return pipe 5, the bubble pump 22, the filtration valve 21,
A backwash path of the filter 14 is formed in which hot water is passed from the downstream side of the filter 14 through the water control valve 23 and the heat exchanger 13 for additional heating to pass through the filter 14 and is drained through the drain valve 24. It is supposed to be done. The sub tank unit 4 is
Hot water overflowing from the mini-tank 8 of the bathtub 2 is temporarily stored in the sub-tank 25. The mini-tank circulation valves 27, 28 are provided from the mini-tank 8 via the mini-tank return pipe 26.
A hot water recovery pump, that is, a hot water recovery path reaching the sub tank 25 via the non-self-priming pump 29 is formed. The sub-tank 25 is returned to the bath 2 through the sub-tank bath switching valve 30, the circulation return pipe 5, the bubble pump 22, and the additional heating pipe 7 and the nozzle unit 10. Further, a drain pipe 31 is connected to the mini tank circulation valve 27, and the sub tank 25
From the above, a drainage path is formed through the subtank water level switch 32 and the subtank drainage valve 33.

The bath apparatus for carrying out the method for collecting hot water of the bath according to the present invention is as described above, and the operation of the bath apparatus 1 will be described below. First, for pouring the hot water into the bathtub 2, the mixing valve 16 in which the water supply pipe 15 branched upstream from the hot water heat exchanger 12 and the downstream side of the hot water heat exchanger 12 are jointly connected to each other, and the atmosphere open tank 17, pouring hot water switching valve 18,
Via the additional heating pump 19, the flow path switching valve 20, the filter 14, the additional heating heat exchanger 13, the water amount control valve 23, the filtration valve 21, the bubble pump 22, the additional heating forward pipe 7, and the additional heating return pipe 6. It is done through the pouring route to the bathtub 2. During the additional heating operation, from the bathtub 2 to the sub-tank bathtub air purge valve 34, the germicidal lamp 35,
Additional heating return pipe 6, pouring additional heating switching valve 18, additional heating pump 19,
There is a reheating route from the filter unit 14 via the flow path switching valve 20 to the reheating heat exchanger 13, the filtration valve 21, the bubble pump 22, and the nozzle unit 10 to the bath 2 via the reheating pipe 7. It is formed. At this time, the hot water passes through the filter 14 and is filtered, and then is returned to the bath 2 through the additional heat exchanger 13.

[0008] Here, when hot water overflows from the bathtub 2 to the mini tank 8, the hot water accumulates in the mini tank 8. Then, the mini tank water level switch 9 is turned on, the mini tank circulation valves 27 and 28 are switched, and the hot water recovery route from the mini tank 8 to the sub tank 25 via the mini tank return pipe 26 to the sub tank 25 is established. It is formed. In this state, the non-self-priming pump 29 is not in operation yet. That is, the hot water recovery path is in a state of standing by until it is filled with hot water. During the waiting time, the air remaining in the mini tank return pipe 26 from the mini tank 8 to the non-self-priming pump 29 returns to the mini tank 8 side as bubbles through the mini tank return pipe 26. The hot water recovery path is filled with hot water. When this waiting time elapses, the non-self-priming pump 29 is operated to collect the hot water in the mini tank 8 into the sub tank 25 through the mini tank return pipe 26 and store it in the sub tank 25. As the collection of hot water proceeds, the water level of the hot water in the mini tank 8 drops, so the mini tank water level switch 9 is turned off and the non-self-priming pump 29 is stopped. After the mini tank water level switch 9 is turned off, the hot water recovery path is maintained without switching the mini tank circulation valves 27 and 28 for a certain period of time. After that, the mini tank circulation valve 27,
28 is switched to return to the normal operation state. As described above, the mini tank water level switch 9 is turned on to switch the mini tank circulation valves 27 and 28 to form the hot water recovery path, and at the same time, the non-self-priming pump 29 is not operated, but the air is supplied from the hot water recovery path. Since the non-self-priming pump 29 is actuated after the lapse of time so that the non-self-priming pump 29 is actuated, the non-self-priming pump 29 can move according to its ability without trapping the air and idly rotating the hot water efficiently Collection is done.

[0009]

Since the present invention is as described above, it is possible to prevent the hot water recovery pump from idling due to the trapping of air, so that the hot water can be efficiently recovered.

[0010]

[Brief description of drawings]

FIG. 1 is a system diagram of a bath device for carrying out a method for collecting hot water of a bathtub 2 according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bath device 2 Bathtub 3 Water heater 4 Sub-tank unit 5 Circulation return pipe 6 Additional heating return pipe 7 Additional heating pipe 8 Mini tank 9 Mini tank water level switch 10 Nozzle unit 11 Bubble bath unit 12 Hot water heat exchanger 13 For additional heating Heat exchanger 14 Filter 15 Water supply pipe 16 Mixing valve 17 Atmosphere tank 18 Pouring hot water switching valve 19 Hot water pump 20 Flow path switching valve 21 Filtration valve 22 Bubble pump 23 Water control valve 24 Drain valve 25 Sub tank 26 Mini Tank return pipe 27 Mini tank circulation valve 28 Mini tank circulation valve 29 Non-self-priming pump 30 Sub tank bathtub switching valve 31 Drain pipe 32 Sub tank water level switch 33 Sub tank drain valve 34 Sub tank bath air purge valve 35 Sterilization lamp

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoki Kageyama 201 Nishi-Kashiwabara Nitta, Fuji City, Shizuoka Prefecture Takagi Industry Co., Ltd. (72) Inventor Masaru Mochizuki 201 Nishi-Kashiwabara Niden, Fuji City, Shizuoka Prefecture Takagi Industry Incorporated (72) Inventor Yoshimasa Hirano 201 Nishi-Kashiwabara Shinden, Fuji City, Shizuoka Prefecture Takagi Industry Co., Ltd. (72) Inventor Sadaharu Hara 201 Nishi-Kashiwabara Shinden, Fuji City, Shizuoka Prefecture Takagi Industry Co., Ltd.

Claims (1)

[Claims] 1. A bathtub in which a water level switch is provided in an auxiliary bathtub that receives overflowing hot water, and a hot water recovery path from the auxiliary bath to the sub tank via the auxiliary bath circulation valve and the hot water recovery pump is connected, the hot water is assisted from the bathtub. When the water overflows into the bathtub, the water level switch is turned on to switch the auxiliary bath circulation valve to form a hot water recovery path, and after a predetermined time has elapsed, the hot water recovery pump is activated to recover the hot water in the auxiliary bath and the water level switch is turned off. A method for collecting hot water in a bathtub, which comprises stopping the hot water recovery pump and maintaining the hot water recovery path for a certain period of time.