JPH03181307A - Filter provided with follow-up burner for supplying hot water - Google Patents

Abstract

PURPOSE:To accurately detect a water level by preventing water flowing into a tank filter when hot water is supplied into a bathtub. CONSTITUTION:In the filter provided with a follow-up burner for supplying hot water, a follow-up burning circuit 4 having a heat exchanger 6 for the bath and a filter circuit furnished with the tank filter 22 are connected to a circuit 2 for circulating hot water through the bathtub 1, and a hot water supply circuit 3 is connected to the follow-up circuit 4 to supply hot water into the bathtub 1. Three-way valves 25 and 26 are so controlled as to close the circulating circuit 2 side when hot water is supplied. When a supply stop valve 19 is opened, hot water is supplied into the bathtub 1. Accordingly, hot water does not pass through the tank filter 22. The water level is then detected by a pressure sensor 7. When the set water level is reached, the stop valve 19 is closed, and the three-way valve 25 on the circulating circuit 2 side is opened.

Description

[Detailed description of the invention] (LC business use!) name fi mouth Book #4 relates to a filtration device with hot water supply and reheating.

(Prior art) Conventionally, there have been various types of filters that circulate and filter bath water, but have a circulation discharge section that has a foam ejecting function.
In the case of the filtration system of 1s Sushi Aya circulation, a separate reheating device was required because the hot water was cooled as it passed through the filtration paddle or cooled by air bubbles. However, it was unsightly as the bathtub had many bubble ejectors and circulation ports for reheating, and each one had to be operated independently, making it cumbersome. In addition to the filtration and foaming functions, it is conceivable to share the reheating circulation thread path.

On the other hand, the mainstream of reheating devices is an automatic hot water reheating device that is integrated with a water heater, drops hot water at a set temperature from the water heater into the bathtub via a reheating circulation line, and automatically fills the bathtub with hot water up to the set water level. It has become.

Therefore, it would be possible to add an automatic hot water reheating function to the above-mentioned filtration device with a bubble function, but this has the following problems.

(aR to be solved by the invention) In other words, the automatic hot water reheating device needs to detect the water level of the bathtub when pouring hot water into the bathtub.
Ideoki of the mackerel is believed to be a story of Soju. At the time of dropping, the hot water flows into the bathtub through the circulation path and also flows into the filter tank. However, unlike bathtubs that are open to the atmosphere, the air in the tank is removed using an air release valve, so the water level rises slowly, creating a difference between the water level in the bathtub and the water level in the filtration tank. (Embodiment) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows 6, rI4 equipped with the automatic hot water reheating device of the present invention.
In FIG. 1 showing the apparatus, 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 the back side flow path 33 and the foot side flow path 3.
4, and a foam jet S35 is provided at the end of each flow path, that is, at the bathtub discharge section. and each channel 33.
34 are each provided with a flow g1 control valve 31,32.

4 is a reheating circuit branched from the discharge side of the pump 5 of the circulation circuit 2, which is used for a bath heat exchanger 6 for heating hot water, a pressure sensor 7 for detecting the water level in the bath Ml, and for determining circulation, etc. A water flow switch 8, a thermistor 9 for detecting the temperature of hot water in the bathtub l, and a self-priming pump 21 for flowing hot water to the reheating circuit 4 are provided. The reheating circuit 4 is connected downstream of each of the flow rate side m-valves 31 and 32 of the back side flow path 33 and foot side flow path 34 of the circulation circuit 2.

3 is bath W! The hot water supply circuit 3 is connected to the bathtub 1 via a reheating circuit 4. The hot water supply circuit 3 is connected from city water to the reheating circuit 2 via the hot water supply heat exchanger 10, and a hot water supply branch circuit 11 is branched from the downstream side of the hot water supply heat exchanger IO of the hot water supply circuit 3. ing. This hot water supply branch circuit 11 is connected to a shower, a stove, etc., and supplies hot water to these FI devices. On the upstream side of the hot water supply heat exchanger [ilo] of the hot water supply circuit 3, an incoming water flow rate sensor 12 for detecting the incoming water flow rate from city water and a thermistor 13 for detecting water temperature are provided. 10 and the hot water supply branch circuit 11 is a flow rate rII regulating valve 14 for adjusting the amount of water drawn.
Thermistor 1 detects the hot water temperature of hot water supply heat exchanger 510
5 is provided. Further, on the downstream side of the hot water supply branch amount 1111, a dropping flow rate sensor 17 that detects the dropping flow rate to the bath N1, a vacuum breaker 18,
A drop-in opening/closing valve 19 and a return valve 20 for opening and closing the hot water supply circuit 3 are 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, which will be described later.

23 is a filtration circuit that branches from the discharge side of the pump 5 of the circulation circuit 2 and is connected to the suction side of the pump 5.
2 is interposed. And filter! Is it a three-way valve from the point upstream of M22? 6 through the backwash drain circuit 24
are branched, and the backwash circuit 30 is joined to a location downstream of the filtration tank 22 via a three-way valve 25.

29 is an air release valve provided in the filtration tank 22;
This is to remove the air inside the tank when filling the tank with water.

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

36 is an air supply pipe connected to each foam jet 535, and the flow rate is controlled by an air amount control valve 37. 4. It is designed to be controlled by God.

Installation of a filtration device equipped with the above automatic hot water reheating device (
To explain the operation during supply *), the three-way valve 16 connects the reheating circuit 4 and the hot water supply circuit 3, and the three-way valve 25.2
6 is controlled to close the circulation circuit 2 side. When the dropping 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, hot water does not pass through the filter tank 22. Then, a certain procedure of water level detection operation is performed to detect the water level with the pressure sensor 7, and when the set water level is reached, the drop-in opening/closing valve 19 is opened. Thereafter, the three-way valve 25 is opened on the circulation circuit 2 side, and the filtration tank 22 is filled with water.

Next, the operation during reheating will be explained. At this time as well, the three-way valve is 2G.
The m-ring circuit 2 side is closed as in the case of dropping.

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 rate control valves 31, 32, and returns into the bath Mt. However,
In this case as well, the hot water does not pass through the filtration J#22, and when the hot water passes through the bath heat exchanger S6, it is heated by a burner (not shown).

Further, during filtration, the three-way valve 25 is controlled to communicate the filtration tank 22 side and the pump suction side of the circulation circuit 2, and the three-way valve 26 is controlled to close in the direction of the backwash drainage circuit 24, Pump 5 is operated. Hot water is drawn into the circulation circuit 2 from the bathtub 1, and is divided into two streams: one that flows to the filtration circuit 23 and one that is discharged into the bath M1. Filtration circuit 23
The hot water that flows through is filtered! 22, and after removing fine dirt such as scale in the bath, it is pumped again to the pump 5 of the circulation circuit 2.
Return to the suction side.

Next, during backwashing, the three-way valve 25 is connected to the backwash circuit 30 side and the filtration N2
As well as being tillfl to connect the two,
The three-way valve 26 is configured to connect the IX treatment tank 22 side and the backwash drainage 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 configured to open at the bottom.
#14 He will control you. The hot water in the hot water supply circuit 3 flows into the backwash circuit 30, the amount is reduced by the governor 27, and after being separated into steam and water by the air separator 28, it flows back through the filtration tank 22 and is drained from the backwash drain circuit 24. Ru. At this time, the backwash water flows backward through the filter tank 22, so that the dirt attached to the filter medium 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 bubble bath operation will be explained.

The three-way valve costs $1111J, the same as when reheating. Then, the pump 5 is operated at a higher capacity than during reheating.

Air volume of air supply pipe 36 connected to foam ejector 35: 1A
When the @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 controlled by a single a-gun device including a microcomputer,
The operating device also corresponds to the control device.

(Effects of the Invention) As described below, in the present invention, water is not allowed to flow into the filtration tank at the time of dropping, so the water level detector detects only the water level in the bathtub, making it possible to accurately detect the water level. be. After filling the tank with hot water, it may take some time to vent the air from the filter tank, but there is no problem.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a filtration device with hot water supply and reheating according to an embodiment of the present invention, and FIG. 2 is a flowchart of main operation. 2...Circulation circuit 3...Hot water supply circuit 4...Reheating circuit 25.26...Three-way valve

Claims (1)

[Claims] A reheating circuit having a bath heat exchanger and a filtration circuit having a filter are connected to a circulation circuit that circulates hot water in the bathtub, and a hot water supply circuit is connected to the reheating circuit to supply hot water into the bathtub. In the device to be dropped, a three-way valve that connects the filtration circuit and the circulation circuit is shut off during the dropping,
A filtration device with additional heating for hot water supply, characterized in that it is controlled to communicate after the completion of pouring.