JPH0493552A - Additional heating apparatus for bubble-producing bath - Google Patents

Abstract

PURPOSE:To prevent the generation of poor circulation when a pump is driven, by a method wherein when a self-priming pump is driven, a flow control valve provided on a flow way on which an additional heating pipe line is not connectively joined between a plurality of the flow ways is actuated on the open side thereof. CONSTITUTION:A self-priming pump 21 provided on an additional heating pipe line 4 is driven prior to a normal pump 5 provided to a circulating pipe line 2. The circulating pipe line 2 branches to a plurality of flow ways and the downstream side of a flow control valve 31 on a back-side flow way 33 connectively joins the additional heating pipe line 4. A flow control valve 32 provided on a foot-side flow way 34 on which the additional heating pipe line 4 is not connectively joined, is actuated on the open side thereof at the enclosed state thereof when the circulating pipe line 2, the additional heating pipe line 4 and the foot-side flow way 34 or the like are filled with hot water by driving the self-priming pump 21. When the self-priming pump 21 is driven, the hot water in a bath tub 1 is directed to the additional heating pipe line 4 through two pipe lines, the circulating pipe line 2 and the foot-side flow way 34, and is discharged into the bath tub 1 out of the back-side flow way 33. Therefore, the air remaining in the foot-side way 34 is removed and the water for priming is supplied to the normal pump 5.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a reheating device for a bubble bath.

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

In Fig. 1, 1 is a bathtub, 2 is a circulation circuit for circulating hot water in the bathtub 1, and 2 is a circulation circuit for circulating hot water in the bathtub 1.
A non-self-priming pump 5 is provided for four circulations. The fIL path on the discharge side of the pump 5 is divided into a back side flow path 33 and a foot side flow path 34, and a foam ejector 35 is provided at the end of each home path, that is, at the bathtub discharge portion. And each flow path 33, 34 has a flow! Control valves 31, 32 are interposed, and the foot-side channel 34 is provided with a pressure sensor 7 for detecting the water level in the bath [1].

Note that the foot-side flow path 34 is disposed below the pump 5.

4 is a reheating circuit branched from the pump 5 discharge side of the circulation port 1112, which includes a bath heat exchanger 6 for heating hot water, a water flow switch 8 used for determining circulation, etc., and a water flow switch 8 for detecting the temperature of water in the bathtub l. A self-priming pump 21 is provided to supply a field to the thermistor 9 and the reheating circuit 4. Rekindling II! ll
1ii4 is f0 of the circulation circuit 2 via the three-way valve 29.
It is branched into a circuit 50 that is connected to the downstream side of the flow IfMII*31 of the 1 flow path 33, and a circuit 51 that is connected to the downstream side of the flow rate*m valve 31.32.

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 I via a forced heating circuit 4. The hot water supply circuit 3 connects city water to the hot water supply heat exchanger 10 and reheats it! It is connected to i circuit 4, and from i*m below the hot water heat exchanger 10 of hot water supply circuit 3, hot water supply branch Ii
! The circuit 11 is branched. This hot water supply branch circuit 1
1 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 10 of the hot water supply (i! 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 RA10 are provided between the hot water supply heat exchanger StO and the hot water supply branch circuit 11.
is a bypass path that connects the upstream side and the downstream side of the hot water supply heat exchanger 10, and the bypass path 38 is provided with a solenoid valve 39 that opens and closes according to a set value of a hot water supply temperature setting (not shown). Further, on the downstream side of the hot water supply branch 1i[11, there is a drop flow rate sensor 17 for detecting the flow rate dropped into the bath Ill, a vacuum breaker 18, a drop opening/closing valve 19 for opening and closing the hot water supply circuit 3, and a check valve 20. is provided. 16 is i! for hot water supply downstream of the check valve 20. This is a three-way valve provided at 33, which branches a backwash circuit 30 connected to a filtration tank, which will be described later.

Reference numeral 23 denotes a filtration circuit that branches from the discharge side of the pump 5 of circulation f times Fa2 and is connected to the suction side of the pump 5, with a filtration tank 22 interposed in the middle. Then, from the filter tank 22, J:
A backwash drainage circuit 24 is branched from the downstream side via a three-way valve 26, and a three-way valve 25 is connected to the 'f! The washing circuits 30 are merged.

The conventional operation of the above-mentioned bubble bath reheating device during pouring (hot water supply) will be explained according to the flowchart in Fig. 3.
The three-way valve 16 connects the reheating circuit 4 and the hot water supply circuit 3, and the three-way valve 25.2G is controlled to close the circulation circuit 2 side. And the three-way valve 29 of reburning time VII4
is opened downstream of the flow rate control valve 31 (
At the same time, the flow rate '@ control valve 31 of the back gA flow path 33 is fully opened, and the control valve 32 for the leg side flow 11334 is fully closed (S2).

Thus, the drop-in opening/closing valve 19 is opened (S3
), the field flows from the hot water supply circuit 3 into the reheating circuit 4,
It is dropped into the bathtub l through the bath heat exchanger 6, the credit flow path 33, and the circulation circuit 2. Next, the foot I! When the pressure sensor 7 of the I flow path 34 detects that the water level is higher than the bubble spout 'a35 position (S4), one on-off valve is closed (S5), the dropping is temporarily stopped, and the tIi amount is adjusted. When the excellent valve 31 is fully opened (S6), the flow 11iIIgi
The self-priming pump 21 was circulating with the valve 32 fully closed (S7). At this time, the field inside the bathtub 1 is the circulation circuit 2.
, passes through the reheating circuit 4, flows from the three-way valve 29 to the circuit 50 side, enters the back (llfL path 33, and returns to the bath [1]. In this way, the circulation circuit 1!32 and the reheating circuit (This is called an air purge to replace the air in the pump 4), and priming the non-self-priming pump 5. Then, when the water flow switch 8 becomes O\-shaped (S8), the flow rate '148s valve 31.32 is opened by a predetermined small opening degree (S9),
Open the two 21t quantity control valves 3L and 32 upstream of the three-way valve (
510), the non-self-priming pump 5 is driven (51
, 1) Air remaining in the circuit (flow path) is drained (
Sl2) I was trying to replace it with hot water. In other words, at this time, the hot water in the bath pIl is flowed into the circulation circuit 2 and the reheating circuit 4, and the hot water that has flowed through the reheating circuits i1 & 4 is flowed into the circuit 5I,
Air purging of these circuits (1111a1%) was attempted by returning hot water into the bathtub 1 from both the blue m channel 33 and the foot side channel 34. Finally, after stopping the pump 5.21 (S13), the on-off valve 19 is opened again (314), a predetermined amount of hot water is dropped into the bathtub 1, and the water level is lowered by being replaced with air. pressure sensor 7.
When detecting the set water level (S15), the on-off valve 19 was closed (S16) to complete the dropping process.

(Plot R to be solved by the invention) However, in the above prior art, the self-priming pump 21
Since the fii amount ws control valve 32 was fully opened when driving the foot side flow path 34, a large amount of air remained in the foot side flow path 34. Further, the foot side m1a34 was disposed below the pump 5. Therefore, before driving the non-self-priming pump 5,
When the flow rate control valve 32 of the first flow 1ii 334 is opened, the air in the foot side flow path 34 rises and enters the pump 5.
This resulted in malfunction of the engine (a phenomenon called aerodynamics).

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

(Embodiment N) Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Incidentally, the same reference numerals are given to the same components as in the prior art, and redundant explanation will be omitted.

In FIG. 1, a self-priming pump 21 provided in the reheating circuit 4 is driven prior to a non-self-priming pump 5 provided in the circulation circuit 2. The circulation circuit 2 branches into a plurality of flow paths downstream of the pump 5, and in FIG. 1, it branches into one path, for example, a dorsal fL path 33 and a foot side flow path. Bad debt channel 33
The foot side flow path 34 is disposed at a lower position than the non-self-priming pump 5, and the flow rate ij1m valve 31 of the bad debt flow path 33 is lower than the non-self-priming pump 5.
The reheating circuit 4 is connected downstream. The flow rate control valve 32 provided in the leg side flow path 34 of the reheating circuit 4 that is not connected to the merging circuit controls the circulation circuit 2, the reheating circuit 4, and the foot flow path by driving the self-priming pump 2I. Fully closed when filling 34 etc. with hot water,! ! ! It is driven from the center to the open side. Furthermore, ii! The washing circuit 30 includes a governor 27 for constant flow rate, a safety valve 40 for preventing water pressure higher than a predetermined water pressure from being applied to the filtration tank, and the f! A drainage channel 41 is provided to drain the water in the washing circuit 30 and prevent it from freezing.
A drain plug (not shown) is provided at the end of the drain channel 41.

Regarding the operation of the above-mentioned reheating device for a bubble bath when pouring in (hot water supply), only the disadvantages of the conventional example will be explained using the flowchart shown in FIG.

The main body in the bath II during the dropping into the bath WIl is detected by the pressure sensor 7 in the foot side flow path 34. As the detection value of the pressure sensor 7 fluctuates, the water level is increased and bubbles are ejected 535.
When it is determined that the digit is 1 or more (S4), the on-off valve 19
is fully closed (S5) to temporarily stop the dropping. Then, the flow rate control valve 31 of the bad debt flow path 33 is turned from fully open to fully open, and the foot side flow! Adjust the flow rate control valve 32 of No. 11334 to a predetermined small opening position for all cases (S6)
The self-priming pump 21 is driven (S7) to perform air purge. The reason why the valve 31 is fully closed is to prevent the hot water discharged from the self-priming pump 21 from being cycled. When the self-priming pump 21 is driven, the hot water in the bathtub 1 passes through two channels, the circulation block 832 and the leg-side flow channel 34, to the reheating circuit 4,
) is discharged into the bathtub 1 from tN33. Therefore, at this time, the air remaining in the leg side flow 834 is removed, and the non-self-priming pump 5 is primed.

Next, when the water flow switch 8 becomes O\ state when the pump 211 is operating (S8), the non-self-priming pump 5 is driven (S8).
9) At this time, since the air in the foot-side flow path 34 has been discharged in advance as described above, even if the foot-side flow path 34 is disposed below the non-self-priming pump 5, the pump 5 is in a state of poor circulation called aerodynamics. However, since there is a small amount of air that remains in the pump 5 without being completely replaced with water when the self-priming pump 5 is operated, the air is not completely replaced with water when the self-priming pump 5 is operated, so it is The non-self-priming pump 5 is also driven to circulate hot water in the bathtub 1 from the circulation circuit 2 to the leg side flow path 34, the reheating circuit 4, the circuit 50, and the back side flow 8.
333. Note that the non-self-priming pump 21 does not cause poor circulation with a small amount of air as described above.

Next, the flow rate 11 control valve 31 is adjusted to a predetermined small opening degree similarly to the flow rate ii control valve 32 (311), and the flow rate m of the three-way valve 29 is
Control valves 31 and 32 are opened on the upstream side (312) to stop both pumps 5 and 21. By this operation, the circulation circuit 2
, the additional heating circuit 4, the circuit 51, the back 111fL path 33, and the leg side flow path 34, which are the reheating operation or the bubble bath operation, in which hot water is flowed through each circuit and flow path.

Next, the operation during reheating will be explained. At this time also the three-way valve 25
．． 26 is the same as when dropping, circulation 1! The 1i132 side is closed. First, the flow rate I control valve 31.3 of the three-way valve 29
2 open the upstream side, adjust the flow rate l1gII valves 31 and 32 to a predetermined small opening degree, and drive the pump 5.21.

If there is water in the bathtub 1, the water is sucked from the circulation circuit 2 into the reheating circuit 4, and the water flow switch 8 is turned on.

However, when the pump 5.21 is operated, hot water flows into the bathtub 1.
The water is sucked 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. Further, when the hot water passes through the bath heat exchanger 6, it is heated by a burner (not shown). When the thermistor 9 detects the set temperature, the operation of the pump 5.21 and the burner is stopped.

In addition, when the self-priming pump 5.21 is operating, the status of the water flow switch 8 is checked, and if the water flow switch 8 does not turn on, the non-self-priming pump 5 becomes aerotic due to the air in the circuit. Since it is possible that the
is stopped and only the self-priming pump 21 is driven.

Then, in the same way as the air purge during the above-mentioned dropping operation, the flow control valve 31 is fully closed, the flow control valve 32 is adjusted to a predetermined small opening degree, and the downstream side of the flow control valve 31 of the three-way valve 29 is opened to open the bathtub. The hot water in 1 is circulated through the circuit 2 and the foot side flow path 34.
Water flows from the two systems to the reheating circuit 4 and returns to the bathtub 1 from the credit flow path 33, thereby filling each circuit and flow path with water and priming the non-self-priming pump 5. be. When the water flow switch 8 is turned on,
The non-self-priming pump 5 is operated together with the self-priming pump 2 for a predetermined period of time to exchange a small amount of air remaining in the non-self-priming pump 5 with hot water. Thereafter, the flow rate control valve 31 of the bad debt channel 33 is adjusted from fully closed to a predetermined small opening in the same way as the flow rate control valve 32, and the flow rate control valves 31, 32 of the three-way valve 29 are adjusted to a predetermined small opening degree.
Upper fLl! 1 and reheat as described above. However, if the water flow switch 8 is not ON even after performing the above operations, it is assumed that there is no hot water in the bathtub 1, so the self-priming pump should be stopped and the user should be notified with an alarm (not shown). It is to make it.

During filtration, the =way valve 25 is controlled by t+4 to communicate the filtration #J22 side and the pump suction side of the circulation circuit 2, and the three-way valve 26 is closed between the backwash drain surface 1i11124. vsm, pump 5 is operated. Hot water is sucked into the circulation circuit 2 from the bathtub 1, and is passed through the filtration circuit 8.
The water is divided into two parts: one that flows to s23 and one that is discharged into the bathtub 1. The hot water flowing into the filtration circuit 23 passes through the filtration tank 22,
After fine dirt such as scale in the bath is removed, it returns to the suction side of the pump 5 of the circulation circuit 2.

Next, during backwashing, the three-way valve 25 is f! The three-way valve 26 is controlled to communicate the washing circuit 30 side and the filtration tank 22 side, and the three-way valve 26 is controlled so as to communicate the filtration 22 side and the backwash drain circuit 24.

In addition, the three-way valve 16 communicates the hot water supply circuit 3 and the backwash circuit 30, and the drop-in opening/closing valve 19 is opened.
be done. Hot water from the hot water supply circuit 3 flows into the backwash interval 1930,
The flow rate is throttled by the governor 27, and the water flows back through the filter $1122 and is drained from the backwash drain circuit 24. At this time, since the backwash water flows back through the filter treatment tank 22, the dirt adhering to the filter medium in the filter #22 is removed and washed away by the backwash water, and is discharged together with the backwash water.

Next, the operation during bubble bath operation will be explained.

The three-way valve and pumps 21 and 5 are set to 1111 as in the case of reheating.
1 will be given. Note that the self-priming pump 21 may be stopped after the water flow switch 8 is turned on.

Air amount 'I of the air supply pipe 36 connected to the foam ejector 35
When the 14 control valve 37 is opened, air bubbles are mixed into the jet stream discharged into the bathtub 1, resulting in a bubble bath. Each of the above operations is performed by a single $ control device including a microcomputer, and the operating device also corresponds to the control device.

Next, the antifreeze operation will be explained. When the outside temperature falls and a predetermined attitude is reached, a detector (not shown) issues 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 liI1m valve 32 is adjusted to a predetermined small degree. Also, the back side flow path 33 side of the three-way valve 29 is opened, and the three-way valves 25 and 26 are controlled by a in the same manner as during filtration. The pump 21 is then operated for a certain period of time or until the outside temperature rises. In this way, in cold weather, the bathtub water is circulated through the bath heat exchanger 6, which can act as a radiator, to prevent freezing.

(Effects of the Invention) As is clear from the examples above, in the bubble bath reheating device of the present invention, the air remaining in the flow path downstream of the flow rate control valve is By driving the valve to the open side, the water is discharged into the bath station, so there is no chance of poor circulation occurring when a non-self-priming pump is operated.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a reheating device for a bubble bath according to an embodiment of the present invention, FIG. 1182 is a flowchart of the operation of the main parts, and FIG. 3 is a flowchart of the operation of the main parts according to a conventional example. 1... Bathtub 2... Circulation circuit 3 ・ ・ 5 ・ 7 ・ ・ 2 l ・ 31. 33 ・ 34 ・ ・Hot water supply circuit / Reheating circuit Non-self-priming pump pressure sensor ・Self-priming pump 32 --- fLi114FB valve ・ Back flow path (flow path) ・Legs (ll flow path (flow path)

Claims (1)

[Claims] A reheating circuit having a bath heat exchanger is connected to a circulation circuit that circulates hot water in the bathtub and discharges a bubble jet into the bathtub, and a non-self-priming pump is provided, and the circulation circuit is connected to the non-self-priming type. branched into a plurality of flow paths downstream of the pump, and a flow rate control valve is interposed in each of the plurality of flow paths, and the reheating circuit is branched from upstream of the plurality of flow paths to control the flow rate control valve. Where the reheating circuit is connected downstream and is further provided with a self-priming pump that is driven before the non-self-priming pump, when the self-priming pump is driven, the plurality of flow paths are A reheating device for a bubble bath, characterized in that a flow rate control valve interposed in a flow path that is not connected to merge in the reheating circuit is driven to the open side.