JPH06103116B2 - Reheating device for bubble bath - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bubble bath reheating device.

(Prior Art and Problems) FIG. 1 is an overall configuration diagram of a bubble bath reheating device in which an automatic hot water reheating function is added to a filtration device with a foam function.

In FIG. 1, 1 is a bathtub, 2 is a circulation circuit for circulating hot water in the bathtub 1, and the circulation circuit 2 is provided with a non-self-priming pump 5 for forcedly circulating hot water. . The discharge side flow path of the pump 5 is divided into a back side flow path 33 and a foot side flow path 34, and a bubble ejector 35 is provided at the end of each flow path, that is, at the bath discharge part. Flow rate control valves 31 and 32 are respectively provided in the flow paths 33 and 34, and a pressure sensor 7 for detecting the water level in the bathtub 1 is provided in the foot side flow path 34. The foot side flow passage 34 is arranged below the pump 5.

Reference numeral 4 denotes a reheating circuit branched from the discharge side of the pump 5 of the circulation circuit 2, for detecting a bath heat exchanger 6 for heating hot water, a water flow switch 8 used for circulation determination, and the hot water temperature in the bathtub 1. A self-priming pump 21 for flowing hot water through the thermistor 9 and the reheating circuit 4 is provided. The reheating circuit 4 is a three-way valve.
Flow control valve 31 of the back side flow path 33 of the circulation circuit 2 via 29
Circuit 50, which is connected to the downstream side of the
To a circuit 51 that is connected to the upstream side of the.

3 is a hot water supply circuit for dropping hot water into the bathtub 1,
The hot water supply circuit 3 is connected to the bathtub 1 via the reheating circuit 4. The hot water supply circuit 3 is connected to the reheating circuit 4 from city water through the hot water supply heat exchanger 10, and the hot water supply branch circuit 11 is branched from the hot water supply circuit 3 downstream of the hot water supply heat exchanger 10. ing. The hot water supply branching circuit 11 is connected to a shower, a currant, or the like, and supplies hot water to these devices. An inlet water flow rate sensor 12 for detecting an inlet water flow rate from city water and a thermistor 13 for detecting a water temperature are provided on the upstream side of the hot water heat exchanger 10 in the hot water supply circuit 3, and the hot water heat exchanger 10 is provided. Between the hot water supply branch circuit 11 and the hot water supply branch circuit 11, there are provided a flow rate adjusting valve 14 for adjusting the incoming water flow rate, and a thermistor 15 for detecting the hot water supply temperature of the hot water supply heat exchanger 10. Reference numeral 38 denotes a bypass passage that connects the upstream side and the downstream side of the hot water supply heat exchanger 10, and the bypass passage 38 is provided with a solenoid valve 39 that opens and closes according to a set value of a hot water supply temperature setter (not shown). There is.
Further, on the downstream side of the hot water supply branch circuit 11, a drop flow rate sensor 17 for detecting a drop flow rate into the bathtub 1,
A vacuum breaker 18, a drop opening / closing valve 19 for opening / closing the hot water supply circuit 3, and a check valve 20 are provided. 16
Is a three-way valve provided in the hot water supply circuit 3 downstream of the check valve 20, which branches a backwash circuit 30 connected to a filtration tank described later.

23 is branched from the pump 5 discharge side of the circulation circuit 2,
A filter tank 22 is connected to the suction side, and a filter tank 22 is provided midway. Then, the backwash drainage circuit 24 is branched from a location upstream of the filtration tank 22 via a three-way valve 26, and the backwash drainage circuit 24 is routed to a location downstream of the filtration tank 22 via a three-way valve 25. Circuit 30 is merged.

The conventional operation of dropping (hot water supply) of the bubble bath reheating device will be described with reference to the flowchart of FIG.
The three-way valve 16 connects the reheating circuit 4 and the hot water supply circuit 3 to each other, and the three-way valves 25 and 26 are controlled to close the circulation circuit 2 side. The three-way valve 29 of the reheating circuit 4 is a flow control valve.
The flow control valve 31 of the dorsal flow path 33 is fully opened, and the flow control valve 32 of the foot flow path 34 is fully closed (S2) while being controlled to open downstream of 31 (S1). .

Then, the drop opening / closing valve 19 is opened (S3).
Then, the hot water flows from the hot water supply circuit 3 into the reheating circuit 4, and is dropped into the bathtub 1 through the bath heat exchanger 6, the back side flow path 33 and the circulation circuit 2. Next, when the pressure sensor 7 of the foot-side flow path 34 detects that the water level is higher than the position of the bubble ejector 35 (S4), the on-off valve 19 is closed (S5) and the dropping is temporarily stopped. Fully close the flow control valve 31 (S6)
A self-priming pump with the flow control valve 32 fully closed
21 was circulating (S7). At this time, the hot water in the bathtub 1 passes through the circulation circuit 2 and the reheating circuit 4, flows from the three-way valve 29 to the circuit 50 side, enters the back side flow passage 33, and returns to the bathtub 1. In this way, the air in the circulation circuit 2 and the reheating circuit 4 is replaced (called air purge), and the non-self-priming pump 5 is primed. And water flow switch 8
When is turned on (S8), the flow control valves 31, 32 are opened by a predetermined small opening (S9), and the flow control valve 3 of the three-way valve 29 is opened.
1, 32 Open the upstream side (S10), and drive the non-self-priming pump 5 (S11) to replace the air remaining in the circuit (flow path) with hot water for a predetermined time (S12). I was there. That is, at this time, the hot water in the bathtub 1 is caused to flow to the circulation circuit 2 and the reheating circuit 4, and the hot water flowing to the reheating circuit 4 is caused to flow to the circuit 51, so that both the back side flow path 33 and the foot side flow path 34 are flown. It has been attempted to perform an air purge of these circuits (flow paths) by returning hot water from the flow paths into the bathtub 1. Then, after finally stopping the pumps 5 and 21 (S13), the on-off valve 19 is opened again (S14), and a predetermined amount of hot water is dropped into the bathtub 1 to replace the air with the lowered water level. When the pressure sensor 7 detects the set water level by further raising the temperature and dropping the hot water (S15), the on-off valve 19 is closed (S16) to finish the dropping.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional technique, since the flow control valve 32 is fully closed when the self-priming pump 21 is driven, a large amount of air is generated in the foot side flow passage 34. It remained. Also, the foot side flow path 34
Was disposed below the pump 5. Therefore, if the flow control valve 32 of the foot side flow passage 34 is opened before driving the non-self-priming type pump 5, the air in the foot side flow passage 34 floats up and enters the pump 5, and the pump 5 This caused a malfunction (a phenomenon called airlock).

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a bubble bath reheating device in which a non-self-priming pump does not malfunction when dropped in a bathtub or the like. .

(Example) Hereinafter, one example of the present invention will be described in detail with reference to the drawings.
It should be noted that the same components as those of the related art are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 1, a self-priming pump provided in the reheating circuit 4
21 is driven prior to the non-self-priming pump 5 provided in the circulation circuit 2. The circulation circuit 2 is branched into a plurality of flow passages downstream of the pump 5, and in FIG. 1, for example, is divided into two flow passages including a back side flow passage 33 and a foot side flow passage 34. The back-side flow path 33 and the foot-side flow path 34 are disposed below the non-self-priming pump 5, and the reheating circuit 4 merges downstream of the flow control valve 31 in the back-side flow path 33. It is connected. The flow control valve 32 provided in the foot side flow path 34 which is not connected to the reheating circuit 4
Is to drive the self-priming pump 21 from the fully closed state to the open side when the circulation circuit 2, the reheating circuit 4, the foot side flow path 34, etc. are filled with hot water. The backwash circuit 30 includes a governor 27 for a constant flow rate, a safety valve 40 for preventing water pressure above a predetermined water pressure from being applied to the filtration tank, and the backwash circuit.
A drainage channel 41 is provided for draining the water in 30 to prevent freezing, and a drain plug (not shown) is provided at the end of the drainage channel 41.

Regarding the operation of the bubble bath reheating device at the time of dropping (hot water supply), only the points different from the conventional example will be described according to the flowchart of FIG.

The water level in the bathtub 1 being dropped into the bathtub 1 is the foot side flow path 34
Is detected by the pressure sensor 7. Pressure sensor 7
When it is determined that the water level is equal to or higher than the position of the bubble ejector 35 due to the fluctuation of the detection value of (S4), the on-off valve 19 is fully closed (S5) and the dropping is temporarily stopped. Then, the flow rate control valve 31 of the back side flow path 33 is adjusted from fully open to fully closed, and the flow rate control valve 32 of the foot side flow path 34 is adjusted from fully closed to a predetermined small opening position (S6). Drive suction pump 21 (S7)
Perform air purge. Here, the reason why the flow rate control valve 31 is fully closed is that the hot water discharged from the self-priming pump 21 is not short-cycled. Then self-priming pump
When 21 is driven, the hot water in the bathtub 1 passes through the circulation circuit 2 and the foot-side flow path 34 to the reheating circuit 4 and is discharged from the back-side flow path 33 into the bathtub 1. Therefore, at this time, the air remaining in the foot-side flow passage 34 is removed, and the non-self-priming pump 5 is primed.

Next, when the water flow switch 8 is turned on when the pump 21 is driven (S8), the non-self-priming pump 5 is driven (S9). At this time, since the air in the foot-side flow passage 34 is discharged in advance as described above, even if the foot-side flow passage 34 is arranged below the non-self-priming pump 5, the pump 5 will not discharge the air. There is never a state of poor circulation called lock. However, the pump 5
When the self-priming pump 5 is operated, there is a small amount of air that remains without being completely replaced with water, so that the self-priming pump 21 and the non-self-priming pump 21 are kept for a predetermined time. The pump 5 is also driven so that the hot water in the bathtub 1 flows from the circulation circuit 2 to the foot side flow path 34.
Then, it is circulated to the additional heating circuit 4, the circuit 50, and the back side flow path 33. The non-self-priming pump 21 does not cause circulation failure with the small amount of air as described above.

Next, the flow control valve 31 is adjusted to a predetermined small opening in the same manner as the flow control valve 32 (S11), the flow control valves 31, 32 upstream side of the three-way valve 29 are opened (S12), and both pumps 5 , 21, stop. By this operation, the circulation circuit 2, the reheating circuit 4, the circuit
51, the reheating operation or the bubble bath operation in which hot water is caused to flow through the circuits and the flow paths of the back side flow path 33 and the foot side flow path 34 is prepared.

Next, the operation at the time of additional heating will be described. At this time, the three-way valve 25,
As for 26, the circulation circuit 2 side is closed as in the case of dropping. First, the upstream side of the flow control valves 31, 32 of the three-way valve 29 is opened, both flow control valves 31, 32 are adjusted to a predetermined small opening, and the pumps 5, 21 are driven. If there is water in the bathtub 1, water is sucked from the circulation circuit 2 into the reheating circuit 4, and the water flow switch 8 is turned on. Then, when the pumps 5 and 21 are operated, hot water is sucked from the bathtub 1 into the circulation circuit 2, passes through the bath heat exchanger 6 and the flow control valves 31 and 32, and returns to the bathtub 1. The hot water is heated by a burner (not shown) when passing through the heat exchanger 6 for bath. When the thermistor 9 detects the set temperature, the pumps 5, 21 and burner are stopped.

Although the state of the water flow switch 8 is observed when the self-priming pumps 5 and 21 are operating, if the water flow switch 8 is not turned on, the non-self-priming pump 5 is in an airlock state with the air in the circuit. Therefore, first, the pump 5 is stopped and only the self-priming pump 21 is driven. Then, the flow control valve 31 is fully closed in the same manner as the air purge during the dropping operation described above, the flow control valve 32 is adjusted to a predetermined small opening degree, and the flow control valve 31 downstream side of the three-way valve 29 is opened.
The hot water in the bathtub 1 is caused to flow from the circulation circuit 2 and the foot side flow path 34 into the reheating circuit 4 and then returned from the back side flow path 33 back into the bathtub 1 so that the water in each circuit and the flow path is water. And priming the non-self-priming pump 5. And if the water flow switch 8 is turned on, a self-priming pump
The non-self-priming pump 5 is operated for a predetermined time together with 21 to replace a small amount of air remaining in the non-self-priming pump 5 with hot water. After that, the flow control valve 31 of the back side flow passage 33 is adjusted from the fully closed state to a predetermined small opening like the flow control valve 32, and the three-way valve is adjusted.
The upstream of the 29 flow control valves 31 and 32 is opened to carry out additional heating as described above. However, if the water flow switch 8 does not turn on even if the above operation is performed, it is considered that there is no hot water in the bathtub 1, so the self-priming pump is stopped and the user is notified by an alarm or the like not shown. To do.

During filtration, the three-way valve 25 is controlled so that the filtration tank 22 side and the pump suction side of the circulation circuit 2 communicate with each other.
The three-way valve 26 is controlled to close in the direction of the backwash drain circuit 24, and the pump 5 is operated. Hot water is sucked from the bathtub 1 into the circulation circuit 2, and is divided into one flowing into the filtering circuit 23 and one discharged into the bathtub 1. The hot water that has flowed to the filtration circuit 23 passes through the filtration tank 22, and after removing fine dirt such as scales in the bath water, returns to the pump 5 suction side of the circulation circuit 2 again.

Next, at the time of backwashing, the three-way valve 25 is controlled so as to connect the backwash circuit 30 side and the filtration tank 22 side, and the three-way valve 26 connects the filtration tank 22 side and the backwash drain circuit 24. Controlled. In addition, the three-way valve 16 connects the hot water supply circuit 3 and the backwash circuit 30 and the drop opening / closing valve 19 is controlled to open. The hot water of the hot water supply circuit 3 flows into the backwash circuit 30, and the governor
The flow rate is throttled by 27, flows back through the filtration tank 22, and is discharged from the backwash drain circuit 24. At this time, the backwash water flows back through the filter tank 22, so that the dirt adhering to the filter material in the filter tank 22 is removed and washed away by the backwash water, and is discharged together with the backwash water.

Next, the operation during the bubble bath operation will be described. The three-way valve and the pumps 21 and 5 are controlled in the same manner as during reheating. The self-priming pump 21 may be stopped after the water flow switch 8 is turned on. When the air amount control valve 37 of the air supply pipe 36 connected to the bubble jetting device 35 is opened, bubbles are mixed into the discharge jet flow into the bathtub 1 to form a bubble bath. And each of the above operations,
It is controlled by a single control device including a microcomputer, and its operating device may correspond to the control device.

Next, the freeze prevention operation will be described. When the outside air temperature falls and reaches a predetermined temperature, a detector (not shown) outputs a signal and only the self-priming pump 21 is operated. At this time, the flow rate control valve 31 is closed and the flow rate control valve 32 is adjusted to a predetermined small opening. Further, the back side flow passage 33 side of the three-way valve 29 is opened, and the three-way valves 25 and 26 are controlled in the same manner as during filtration. Then, the pump 21 is operated for a certain period of time or until the outside air temperature rises. In this way, the bath water is circulated through the bath heat exchanger 6, which can serve as a radiator during cold weather, to prevent freezing.

(Effects of the Invention) As is apparent from the embodiments described above, in the bubble bath reheating device of the present invention, the air remaining in the flow path downstream of the flow control valve controls the flow rate when the self-priming pump is driven. By driving the valve to the open side, it is discharged into the bath, so there is no possibility of poor circulation when the non-self-priming pump is driven.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bubble bath reheating device according to an embodiment of the present invention, FIG. 2 is a main part operation flowchart, and FIG. 3 is a main part operation flowchart according to a conventional example. 1 ... Bathtub 2 ... Circulation circuit 3 ... Hot water supply circuit 4 ... Reheating circuit 5 ... Non-self-priming pump 7 ... Pressure sensor 21 ... Self-priming pump 31, 32 ... Flow control valve 33 …… Back side flow path (flow path) 34 …… Foot side flow path (flow path)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nishiichiro 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo In stock company Noritsu (72) Inventor Kazuhiro Kimura 32 Akashi-cho, Chuo-ku, Kobe, Hyogo Stock company Noritsu (72) Inventor Zuhiko Yoshihiro 32 Akashi-cho, Chuo-ku, Kobe City, Hyogo Prefecture Noritsu Internal Co., Ltd. Examiner Susumu Funaki (56) Reference JP-A-2-32829 (JP, A) JP-A-63-123944 (JP, A)

Claims (1)

[Claims] 1. A reheating circuit having a bath heat exchanger is connected to a circulation circuit that circulates hot water in a bathtub and discharges a bubble jet into the bathtub, and a non-self-priming pump is provided to connect the circulation circuit. Branch into a plurality of flow channels downstream of the non-self-priming pump,
A flow control valve is provided in each of the plurality of flow paths,
A self-priming pump that branches the reheating circuit from the upstream of the plurality of flow paths and joins and connects to the downstream of the flow rate control valve, and further is driven in the reheating circuit prior to the non-self-priming pump. When the self-priming pump is driven, the flow control valve provided in the flow passage that is not joined to the reheating circuit in the plurality of flow passages is driven to the open side when the self-priming pump is driven. A reheating device for a bubble bath.