JPH07101124B2 - 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) The applicant of the present invention has previously described, as a reheating device for a bubble bath in the specification of Japanese Utility Model Laid-Open No. 3-83766, as shown in FIG. Circulation circuit 2 to discharge
In which the non-self-priming pump 5 is interposed while the additional heating circuit 4 having the bath heat exchanger 6 is connected,
A flow control valve in which the reheating circuit 4 is provided in the circulation circuit 2.
A device in which a self-priming pump 21 that is operated prior to the operation of the non-self-priming pump 5 is provided in the reheating circuit 4 is branched from the upstream of 31 and 32 and is connected to the downstream. When the non-self-priming pump 5 is operated by reheating or foaming, the non-self-priming pump 21 is driven in advance to add the reheating circuit 4
Further, the circulation circuit 2 is filled with water (referred to as an air purge) to prime the non-self-priming pump 5.

Furthermore, in the above-mentioned conventional example, the hot water supply circuit 3 for dropping hot water into the bathtub 1 is connected to the bathtub 1 via the additional heating circuit 4, and when hot water is automatically dropped, hot water is added from the hot water supply circuit 3 to the additional heating circuit 4. It was made to flow inside, and was dropped into the bathtub 1 through the bath heat exchanger 6 and the circulation circuit 2.
Therefore, since the circuit is filled with hot water, the air purging time by the self-priming pump 21 is short.

(Problems to be Solved by the Invention) However, in the above-described conventional example, when hot water is dropped into the bathtub 1 from a hot water supply circuit (faucet) (not shown) outside the device, most of the reheating circuit 4 and the circulation circuit 2 are discharged. The hot water was not filled, the air purge time by the self-priming pump 21 became long, and the waiting time at the time of reheating and foaming operation was long for the user, which was not preferable.

The present invention has been made in view of the drawbacks of the above conventional example,
The objective is to shorten the air purge time in the circuit by the self-priming pump that is performed at the beginning of these operations in reheating operation and bubble operation after hot water is dropped from the hot water supply circuit outside the device to the bathtub. I am trying.

(Example) Hereinafter, one example of the present invention will be specifically described with reference to the drawings.

FIG. 1 is an overall configuration diagram of a bubble bath reheating device in which an automatic hot water supply 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 a plurality of flow paths, for example, the back side flow path.
A foam ejector 35 is provided at the end of each flow path, that is, the bath discharge part, which is divided into the flow path 33 and the foot-side flow path 34. Further, flow rate control valves 31, 32 are respectively provided in the respective flow paths 33, 34,
The foot side flow path 34 is provided with a pressure sensor 7 as a pressure detecting means for detecting the water level in the bathtub 1. The back side flow path 33 and the foot side flow path 34 are 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 is provided in the thermistor 9 and the reheating circuit 4. The reheating circuit 4 is a three-way valve.
The flow rate control valve 31 of the back side flow path 33 of the circulation circuit 2 via 42
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, there are a drop flow rate sensor 17 for detecting the flow rate dropped 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. It is installed. 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, a backwash drain circuit 24 is branched from a location on the upstream side of the filtration tank 22 via a three-way valve 26, and the backwash drainage circuit 24 is routed to a location on the downstream side of the filtration tank 22 via a three-way valve 25. Circuit 30 is merged. In the backwash circuit 30,
A governor 27 for constant flow rate, a safety valve 40 for preventing water pressure above a prescribed water pressure from being applied to the filter tank, and a drainage channel 41 for discharging water in the backwash circuit 30 to prevent freezing are provided, A drain plug (not shown) is provided at the end of the drainage channel 41. Although not shown, the pressure sensor 7, the water flow switch 8, the thermistors 9, 13, 15 and the flow sensor 1 described above are also provided.
The outputs of 2, 17, etc. are inputted to a control means composed of a microcomputer, etc., and the pumps 5, 21, three-way valves 16, 25, 26, 42, open / close valves 19, 39, are operated by the control means in accordance with an operation flow described later. It controls the drive of the flow rate control valves 31, 32, the air amount control valve 37, etc., the opening / closing operation, etc.

The self-priming pump 21 provided in the reheating circuit 4 is driven when an increase in the output value of the pressure sensor 7 is detected while the opening / closing valve 19 is closed.

The operation of the bubble bath reheating device at the time of dropping (hot water supply) will be described with reference to the flowchart of FIG.
16 connects the reheating circuit 4 and the hot water supply circuit 3 and
The three-way valves 25, 26 are controlled so as to close the circulation circuit 2 side. Then, the three-way valve 42 of the reheating circuit 4 is controlled to open downstream of the flow rate control valve 31 (S1), and the back side flow path
The flow control valve 31 of 33 is fully opened, and the flow control valve 32 of the foot-side flow path 34 is fully closed (S2).

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 it is judged by the pressure sensor 7 of the foot side flow path 34 that the water level is higher than the position of the bubble ejector 35 (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). The suction side pump 21 is driven (S7) to perform air purge. Here, the flow control valve 31 is fully closed because
This is because the hot water discharged from the self-priming pump 21 is not short cycled. Then, when the self-priming pump 21 is driven, the hot water in the bathtub 1 is circulated in the circulation circuit 2 and the foot-side passage 34.
It goes through the passage to the reheating circuit 4, and is discharged from the back side flow passage 33 into the bath 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 called.

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 21 is operated, there is a small amount of air that is not completely replaced with water and remains, so that the self-priming pump 21 and the non-self-priming pump are used 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 reheating circuit 4, the circuit 50, and the back side flow path 33 to perform the air purge. The non-self-priming pump 5
Does not cause defective circulation with a small amount of air as described above.

Next, the flow rate control valve 31 is adjusted to a predetermined small opening similarly to the flow rate control valve 32 (S11), the flow rate control valves 31, 32 upstream of the three-way valve 42 are opened (S12), and both pumps 5 , 21 are stopped (S13). Then, the on-off valve 19 is opened again (S14), and a predetermined amount of hot water is dropped into the bathtub 1 so as to raise the water level which is lowered by being replaced with air, and the hot water is further dropped so that the pressure sensor 7 sets the set water level. When it is detected (S15), the on-off valve 19 is closed (S16) to complete the dropping. By this operation, preparation for the reheating operation or the bubble bath operation in which hot water is caused to flow in the circulation circuit 2, the reheating circuit 4, the circuit 51, each circuit of the back side flow path 33 and the foot side flow path 34 and the flow path is performed. is there.

Next, the operation at the time of dropping (hot water supply) from the hot water supply circuit (faucet) (not shown) other than the bubble bath heating device into the bathtub 1 will be described according to the flowchart of FIG. When it is determined that the drop opening / closing valve 19 is closed (S1), it is detected that the output value of the pressure sensor 7 is rising (S2), and it is not shown outside the device. It is judged that the water is being dropped (hot water supply) from the hot water supply circuit (faucet). And the three-way valve 16 is the reheating circuit 4 and the hot water supply circuit 3.
And the three-way valves 25 and 26 are controlled so as to close the circulation circuit 2 side (S3).

Next, the three-way valve 42 of the reheating circuit 4 is controlled to open downstream of the flow rate control valve 31 (S4), and the flow rate control valve 31 of the back side flow passage 33 is fully closed to allow the foot side flow. The flow control valve 32 of the passage 34 is adjusted to a predetermined small opening (S5), and the self-priming pump 21 is driven (S6). The hot water in the bathtub 1 goes through the circulation system 2 and the foot side flow path 34 to the reheating circuit 4 through the 2 system path, and the back side flow path.
The liquid is discharged from 33 into the bath 1 and the air in the circuit is purged. Therefore, the air purge time by the self-priming pump 21 can be shortened in the reheating operation and the bubble bath operation described later. After this, the water flow switch 8
When turned on (S7), the flow control valve 31 is adjusted to a predetermined small opening similarly to the flow control valve 32 (S8), and the three-way valve 42 is set to the flow control valve 3
The operation of the self-priming pump 21 is stopped (S10) after opening to the upstream side of 1, 32 (S9) to prepare for reheating or bubble operation.

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 flow control valves 31, 32 upstream of the three-way valve 42 are opened, both flow control valves 31, 32 are adjusted to a predetermined small opening, and the pumps 5, 21 are driven to perform air purge. Pump 5, 21
Is operated, hot water is sucked into the circulation circuit 2 from the bathtub 1, passes through the bath heat exchanger 6 and the flow control valves 31, 32,
Return to Bath 1. Before the reheating operation, the hot water supply circuit 3 as described above
Alternatively, when the operation of dropping from a hot water supply circuit (faucet) (not shown) outside the apparatus is performed in advance, hot water is in the bathtub 1, and the circulation circuit 2 and the reheating circuit 4 are filled with hot water. The air purge time is short, the water flow switch 8 is immediately turned on, and the burner (not shown) disposed below the bath heat exchanger 6 starts to burn. Therefore, unlike the conventional example, the waiting time does not become long in the reheating operation after being dropped from the hot water supply circuit (faucet) outside the device. Next, the hot water is heated by the burner when passing through the bath heat exchanger, and when the thermistor 9 detects the set temperature, the pumps 5, 21 and the 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 42 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 side of the flow rate control valves 31, 32 of 42 is opened to perform the 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 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 by. 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 in the hot water supply circuit 3 flows into the backwash circuit 30, the flow rate of the hot water is reduced by the governor 27, and the water flows back through the filtration tank 22 and is discharged from the backwash drain circuit 24. At this time, the backwash water is filtered into the filtration tank 22.
Is backwashed, the dirt adhering to the filter material in the filter tank 22 is stripped off by backwash water, washed away, and discharged together with the backwash water.

Next, the operation during the bubble bath operation will be described. Three-way valve 25,
26, 42, pumps 21 and 5, and flow rate control valves 31, 32 are controlled in the same manner as during reheating, and air purge is performed. At this time, before the bubble bath operation, when the dropping operation from the hot water supply circuit 3 or the hot water supply circuit (faucet) (not shown) outside the apparatus is performed in advance as described above, the air purge time is short as in the case of additional heating. Done, the water flow switch 8 turns on immediately
However, the long waiting time as in the past is eliminated. 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. Further, each operation described above is controlled by a single control device including a microcomputer, and its operating device may correspond to the control device.

(Effects of the Invention) As is apparent from the embodiments described above, in the bubble bath reheating device of the present invention, when hot water is dropped into the bathtub from the hot water supply circuit (faucet) outside the device, the air purge in the circuit is performed. Since this is done, it is possible to shorten the waiting time during the reheating after the dropping and the bubble operation.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an overall configuration diagram of a bubble bath reheating device, and FIG. 2 is a flow chart showing a dropping operation from a hot water supply circuit of the device, FIG. Three
FIG. 4 is a flow chart showing a dropping operation from a hot water supply circuit (faucet) outside the apparatus, and FIG. 4 is an overall configuration diagram of a conventional example. 1 ... Bathtub 2 ... Circulation circuit 3 ... Hot water supply circuit 4 ... Reheating circuit 5 ... Non-self-priming pump 7 ... Pressure sensor (pressure detecting means) 19 ... Open / close valve 21 ... Self-priming type The pump

Front Page Continuation (72) Inventor Nishi Ichiro, No. 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo, Ltd. (72) Inventor, Kazuhiro Kimura, No. 32, Akashi-cho, Chuo-ku, Kobe, Hyogo (72) ) Inventor Yoshiko Yoshiko 32, Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture Noritsu Internal Co., Ltd. Examiner Hideaki Tazawa (56) References

Claims (1)

[Claims] 1. A hot water supply circuit in which a reheating circuit having a bath heat exchanger is connected to a circulation circuit for circulating hot water in a bathtub and discharging a bubble jet into the bathtub, and the reheating circuit is opened and closed by an on-off valve. In the bubble bath reheating device to which the circuit is connected, a non-self-priming pump for circulating the inside of the circuit provided on the circulation circuit, and information on the water level of the bathtub provided on the circulation circuit, A pressure sensor for detecting, a self-priming pump for circulating in the circuit provided on the reheating circuit, and an output value of the pressure sensor increases when the open / close valve of the hot water supply circuit is closed. When it is detected, it is judged that water or hot water is being supplied from other than this device,
A reheating device for a bubble bath, comprising: a control means for driving the self-priming pump provided in a reheating circuit.