JPH0712404B2 - Filtration device with hot water supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hot water supply-and-fired filtration device.

(Prior Art) In the related art, various types have been proposed in which a circulating discharge unit is provided with a bubble jetting function, in addition to a unit for circulating and filtering bath water. By the way, in this type of filtering device, since hot water is cooled when passing through the filtering tank or cooled by bubbles, a separate reheating device is required. However, it is unsightly because many foam jets and circulation ports for reheating are attached to the bathtub.
In addition, each operation was independent, which was troublesome. Therefore, in addition to the filtration and foam functions that share the circulation path, it is possible to share the additional heating circulation path.

On the other hand, in the reheating device, the mainstream is an automatic hot water reheating device that is combined with a water heater, drops hot water from the water heater at the set temperature into the bathtub through the reheating circulation system path, and automatically fills the water to the set water level. Has become.

Therefore, it suffices to add an automatic hot water reheating function to the above-described filter device with a foaming function, but it has the following problems.

(Problems to be solved by the invention) That is, the automatic hot water supply reheating device is required to detect the water level of the bathtub when dropping hot water into the bathtub, and the water level detector is provided in the reheating circulation system path. . Then, at the time of dropping, the hot water flows into the bath through the circulation path and also into the filtration tank. However, in the case of a filter tank that is open to the atmosphere, since the air inside the tank is evacuated by the air bleeding valve, the rising speed of the water level is slow, and there is a difference between the water level in the bath and the water level in the filter tank. The accurate water level could not be detected.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a filtering device equipped with the automatic hot water supply and reheating device of the present invention. 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 pump 5 for forcibly circulating hot water. The flow path on the discharge side of the pump 5 is divided into a back flow path 33 and a foot flow path 34, and a bubble ejector is provided at the end of each flow path, that is, at the bath discharge part.
35 are provided. Flow rate control valves 31 and 32 are provided in the flow paths 33 and 34, respectively.

Reference numeral 4 is a reheating circuit branched from the discharge side of the pump 5 of the circulation circuit 2, and is used for a bath heat exchanger 6 for heating hot water, a pressure sensor 7 for detecting the water level in the bathtub 1, circulation determination, etc. A water flow switch 8, a thermistor 9 for detecting the temperature of the hot water in the bathtub 1, and a self-priming pump 21 for supplying hot water to the reheating and reheating circuit 4. The reheating circuit 4 is a flow control valve for each of the dorsal passage 33 and the foot passage 34 of the circulation circuit 2.
It is connected to the downstream side of 31 and 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 1 via the reheating circuit 4. The hot water supply circuit 3 is connected to the reheating circuit 2 from city water through the hot water supply heat exchanger 10, and a 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. Further, on the downstream side of the branch point with the hot water supply branch circuit 11, a drop flow rate sensor 17 for detecting the 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 reverse valve. A stop valve 20 is provided. Reference numeral 16 denotes 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. Reference numeral 29 denotes an air vent valve provided in the filter tank 22 for venting air from the tank when the filter tank 22 is filled with water.

The backwash circuit 30 is provided with a governor 27 for constant flow rate and an air separator 28.

36 is an air supply pipe connected to each bubble ejector 35, and the flow rate is controlled by an air amount control valve 37.

Although not shown, a load required for each operation, for example, a drop opening / closing valve in the case of drop operation, is received in response to a command to start or stop each operation of drop operation, reheating operation, filtration operation, and bubble bath operation. 19. A single control device including a microcomputer for controlling opening / closing of the three-way valves 16, 25, 26 is provided.

The operation of the filtering device equipped with the automatic hot water reheating device at the time of dropping (hot water supply) will be described. The three-way valve 16 makes the reheating circuit 4 and the hot water supply circuit 3 communicate with each other, and the three-way valves 25 and 26 make the circulation circuit 2 Controlled to close the side. Then, when the drop opening / closing valve 19 is opened, hot water flows from the hot water supply circuit 3 into the reheating circuit 4, passes through the bath heat exchanger 6 and the circulation circuit 2, and is dropped into the bathtub 1. Therefore, in this case, the hot water does not pass through the filtration tank 22. Then, the water level detection operation of a certain procedure is performed, the water level is detected by the pressure sensor 7, and when the set water level is reached, the drop opening / closing valve 19 is closed. After that, open the circulation circuit 2 side with the three-way valve 25, and
The inside of 22 is filled with water.

Next, the operation at the time of additional heating will be described. At this time as well, the three-way valve 26 closes the circulation circuit 2 side as in the case of dropping. Then, when the pump 5 is 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. Therefore, also in this case, the hot water does not pass through the filtration tank 22. The hot water is heated by a burner (not shown) when passing through the heat exchanger 6 for bath.

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. The hot water is sucked into the circulation circuit 2 from the bath 1 and is divided into one flowing into the filtering circuit 23 and one discharged into the bath 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. Further, 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, the flow rate is reduced by the governor 27, and the air / water separator 28 separates the water from the water.
Drained from 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 peeled off by the backwash water, washed off, and discharged together with the backwash water.

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

The three-way valve is controlled in the same way as during reheating. And pump 5
Is driven with greater capacity than when it is fired. 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.

(Effects of the Invention) As described above, according to the present invention, since water is not allowed to flow into the filtration tank at the time of dropping, the water level detector detects only the bath water level, and the accurate water level can be detected. . It should be noted that after completion of the filling with water, it does not matter that the air removal from the filtration tank takes a little time.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a filter device with hot water supply and reheating according to an embodiment of the present invention, and FIG. 2 is an operation flowchart of main parts. 1 ... Bathtub 2 ... Circulation circuit 3 ... Hot water supply circuit 4 ... Reheating circuit 25, 26 ... 3-way valve

 ─────────────────────────────────────────────────── ─── 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 Naoto Noda, Inspector, Noritsu, 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture

Claims (1)

[Claims] 1. A reheating circuit having a pressure sensor for detecting the water level in the bath and a heat exchanger for bath is branched and connected to a circulation circuit provided with a pump for circulating hot water in the bath. A filtering circuit having a filtering device provided is branched and connected via a three-way valve, and a hot water supply circuit having a drop opening / closing valve is connected to the reheating circuit, and additional heating is performed by opening the drop opening / closing valve. In the case of dropping hot water from the circuit to the bathtub via the circulation circuit, the above-mentioned three-way valve that cuts off the filtration circuit and the circulation circuit at the same time as opening and closing the drop opening / closing valve according to the water level detected by the pressure sensor at the time of dropping A filtration device with hot-water supply and reheating, which is equipped with a control device that shuts off the inside and allows communication after dropping.