JPH068454Y2 - Circulating water heater - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a circulating water heater that circulates bath water for heating and purification.

[Conventional technology]

In a normal bath, water is poured into a bathtub to heat it to an appropriate temperature, or preheated hot water is poured into the bathtub. The bath water after use is normally discharged from the bathtub as it is.

On the other hand, a circulating water heater has been recently developed in which hot water is circulated in a bathtub and heated while circulating the bath water, and dirt of the bath water is removed by a purification filter.

FIG. 5 schematically shows the structure of a conventional circulating water heater.

The circulating water heater is provided with a purification filter 2 composed of a filtering material 2a, natural stones 2b and the like inside a sealed tank 1, and a heater 3 and a temperature sensitive element 4 below the tank 1. Then, the bath water A of the bathtub is sucked by the pump 5 through the suction pipe 6, injected into the tank 1 through the injection pipe 7, and purified by the purification filter 2. The temperature of the purified bath water A is detected by the temperature sensing element 4, and the bath water A is heated by the heater 3 to have an appropriate temperature. The bottom of the tank 1 is connected to the bath water A of the bathtub through the discharge pipe 8 so that the bath water A after purification and heating is discharged into the bathtub. The above-mentioned pump 5, tank 1, etc. are the same housing
It is housed in 10 and constitutes a circulating water heater.

According to such a circulating water heater, the bath water A is always kept at an appropriate temperature, and the stains on the bath water A are purified.
You can take a bath at any time without changing the bath water A for a week to 10 days.

[Problems to be solved by the invention]

In the bath using the circulating water heater, it is necessary to drain the bath water A from the bathtub in order to replace the bath water A, or for maintenance and inspection. In addition, there is a case where the bath water A is drained due to an error from the customs that have been used up to now.

When the bath water A is drained from the bathtub, the tips of the suction pipe 6 and the discharge pipe 8 of the circulating water heater come into contact with air, and the bath water in the tank 1, the pump 5, and the pipes 6, 7, and 8 All A will flow out.

In order to restart the circulating water heater in this state, the pump 5 must be filled with water. Therefore, after connecting the tip of the suction pipe 6 to the tap of the tap water and injecting the guide water for the pump 5 by the pressure of the tap water,
It is necessary to operate the pump 5. Then, after the pump 5 starts to operate normally, the tip of the suction pipe 6 must be immersed in the bath water A of the bathtub to fill the empty tank again with the bath water A. Therefore, once the bath water A is pulled out from the bathtub, there is a problem that it takes time to restart.

When pouring water into the tank 1 from the injection pipe 7,
The air in the tank 1 is injected while being pushed away, but the pushed-off air is discharged from the bathtub through the heating section in which the purification filter 2, the heater 3 and the temperature sensing element 4 are arranged and the discharge pipe 8. It is discharged into the bath water A. Therefore, since the air resistance is large and the path is long, there is a problem that it takes time to fill the tank 1, the pump 5, and the pipes 6, 7, and 8 with water.

The present invention has been devised in order to solve the above-mentioned problems, and prevents the bath water in the tank from flowing out even when the bath water in the bathtub is drained. The purpose is to make restarting quick and easy.

[Means for solving problems]

The circulating water heater of the present invention injects bath water in a bathtub into a tank by a pump, purifies and heats it with a filter and a heater built in the tank, and then puts it into the bathtub through a discharge pipe. In the circulating water heater for discharging, the discharge pipe has an inverted U shape, one end of the discharge pipe is connected to the lower part of the tank, and the top of the discharge pipe has a height corresponding to the upper part of the tank. And the float is arranged in the vertical direction in the cylindrical body at the top of the discharge pipe, and when air is present inside the cylindrical body, the float descends and the valve opens to open the inside of the discharge pipe. It is characterized in that an automatic air vent valve is connected which communicates with the outside air to raise the float and close the valve when water is filled.

Further, an upper end of the tank may be connected to an input end of the automatic air bleeding valve in order to reduce resistance when the tank is filled with water.

Furthermore, if a suction pipe is connected to the suction side of the pump and a foot valve is attached to the tip end of the suction pipe, bath water in the pump is also retained.

[Action]

In the normal state, since the discharge port of the discharge pipe is immersed in bath water in the bathtub and the discharge pipe is filled with water, the automatic air vent valve is also filled with water. Therefore, the automatic air vent valve is closed and water does not leak to the outside from the automatic air vent valve.

When the bath water in the bathtub is drained, the water level of the bath water drops,
The tip of the discharge pipe comes into contact with air. Therefore, the bath water in the inverted U-shaped discharge pipe begins to flow out from the discharge port, and air is introduced into the discharge pipe in exchange for the discharged bath water, and the automatic water is provided at the top of the discharge pipe. Air accumulates inside the tubular body of the air vent valve. Due to the presence of this air, the float of the automatic air bleeding valve descends and the automatic air bleeding valve opens, and the inside of the discharge pipe communicates with the outside air. Since air has less resistance than water, once the automatic air vent valve is in the open state, the amount of water flowing out of the discharge pipe allows air to enter the discharge pipe from the outside through the automatic air vent valve. Inflow. Therefore, after this, the bath water in the tank will not be sucked out of the tank. Further, since the top of the inverted U-shaped discharge pipe is arranged at the height corresponding to the upper portion of the tank, the water in the tank does not flow out from the top of the inverted U-shaped discharge pipe. . As a result, the water level in the tank is secured up to the height of the top of the discharge pipe.

Also, if the upper end of the tank and the input end of the automatic air bleeding valve are connected, the automatic air bleeding valve is opened when water is injected from the injection pipe into the empty tank,
The air in the tank is discharged to the outside of the tank with a small resistance through the automatic air vent valve. Therefore, water can be poured into the tank promptly. When the inside of the tank is filled with water, the automatic air bleeding valve is closed due to the water pressure, and the water does not flow out of the tank.

Furthermore, if a foot valve is attached to the tip of the suction pipe, when the pump is stopped, the downstream side of the foot valve, that is,
Positionally, the pressure of the bath water on the upper side prevents the foot water from closing and the bath water in the pump and the suction pipe does not flow out from the suction pipe.

〔Example〕

Hereinafter, features of the present invention will be specifically described based on embodiments with reference to the drawings. The parts corresponding to those of the conventional circulating water heater shown in FIG. 5 are designated by the same reference numerals.

FIG. 1 is a partially cutaway front view of a circulating water heater according to an embodiment of the present invention,
FIG. 2 is a partially cutaway plan view of the same.

In the figure, reference numeral 10 designates a substantially isosceles right-angled triangular tubular housing, and a tank 1 is provided in the housing 10. Tank 1
Has a cylindrical shape as a whole, and a lid body 11 is attached to the upper end portion thereof with a thumbscrew 12 to form a closed structure.
On the lower side of the tank 1, a disc-shaped punching metal 13 is attached in contact with the inner peripheral surface of the tank 1, and a natural stone 2b and a filtering material 2a are sequentially laminated on the punching metal 13 to form a purification filter 2. To be done. Also, at the bottom of the tank 1,
The heater 3 and the temperature sensitive element 4 are provided to constitute a heating unit. Furthermore, a drainage device 14 for draining water is provided at the bottom of the tank 1.

Further, below the tank 1, a pump 5 is fixed on the bottom plate of the housing 10, and a suction pipe 6 is connected to the suction side of the pump 5, and between the discharge side of the pump 5 and the upper end of the tank 1. The injection pipe 7 is connected. Further, one end of an inverted U-shaped discharge pipe 9 is connected to the lower end of the tank 1.

The suction / discharge unit 30 shown in FIGS. 3 and 4 is connected to the tips of the suction pipe 6 and the discharge pipe 9. Details of the suction / discharge unit 30 will be described later.

Further, in the space above the housing 10, the automatic air vent valve 20 is fixed to the inner surface of the housing 10 by the mounting plate 20a. The input end 20b of the automatic air bleeding valve 20 is branched into two by a branch pipe, one of which is connected to the top of the inverted U-shaped discharge pipe 9 via a connecting pipe 22 and the other of which is connected to the tank 1 via a connecting pipe 23. Lid 11
Connected with. The top of the inverted U-shaped discharge pipe 9 is arranged at a height corresponding to the top of the tank 1. Note that 20c is an output end of the automatic air bleeding valve 20.

The automatic air bleeding valve 20 is arranged such that the float is movable in the vertical direction in the tubular body, and the float moves up and down according to the water level in the tubular body. An input end 20b is connected to the lower end of the tubular body, and an output end 20c communicating with the outside air is connected to the upper end, so that the output end 20c is blocked by the float when the float reaches a predetermined height or higher. It has become. In the automatic air vent valve 20, when the water level in the tubular body is below a certain value, the float is in the lowered position,
The output end 20c is opened and the valve is opened to allow the air to flow between the inside of the discharge pipe 9 and the outside air. However, when the water level exceeds a certain value, the float rises and closes the output end 20c. The valve closes automatically. In the present embodiment, the automatic air vent valve 20 is used so that when such air is present, the valve is opened so that the inside of the discharge pipe communicates with the outside air, and when the water is filled, the valve is closed.

Next, the suction / discharge unit 30 will be described with reference to the partially cutaway front view of FIG. 3 and the partially cutaway side view of FIG.

In the suction / discharge unit 30, a lower plug 32 is fitted to the bottom of a cylindrical filter case 31. A through hole 32a is formed in the central portion of the lower plug 32, and double step portions 32b and 32c are formed in the peripheral portion, and an inner step portion 32b is formed of a cylindrical punching metal whose upper side is closed. The filter 33 is formed and fitted. A filter 34 made of a cylindrical foamed urethane having a predetermined thickness and having a predetermined thickness is fitted around the outer periphery of the filter 33. Then, the step portion 32c on the outer side of the lower plug 32 is fitted to the inner peripheral surface of the filter case 31, whereby the filters 33, 34 are attached to the filter case 31.

An upper plug 35 is fitted on the upper part of the filter case 31. A foot valve 36 and a discharge nozzle 37 are attached to the upper plug 35.

The foot valve 36, as shown in FIG.
A tubular body 38 having a and 38b and a large diameter portion 38c in the middle is provided. The float chamber 38d in the large diameter portion 38c has a small diameter portion.
A float 39 composed of a rubber ball having a diameter larger than the inner diameters of 38a and 38b is arranged so as to be movable in the vertical direction,
A pin 40 projecting in the direction of the central axis of the tubular body 38 is provided on the upper part of the. Then, the small diameter portion 38b at the lower end of the tubular body 38 is inserted into the upper plug 35 and communicates with the inside of the filter case 31.

Further, the main body 41 of the discharge nozzle 37 has a substantially horizontal cylindrical shape with one end opened, and a water pipe 42 is fitted at a right angle to the tip of the water pipe 42 so as to communicate with the inside of the discharge nozzle main body 41. To be done. Furthermore, inside the discharge portion 41a having a large diameter inside the discharge nozzle body 41, the inclined tip end of the air pipe 43 is attached in a protruding state. Then, the discharge nozzle 37 is fixed on the upper plug 35 by a screw 44. The upper end of the air pipe 43 is connected to one end of an air hose (not shown),
The other end of the air hose passes through the bottom plate of the housing 10 and is opened inside the housing 10.

The small diameter portion at the upper end of the tubular body 38 of the suction / discharge unit 30 described above.
38a is connected to the suction pipe 6 shown in FIG. 1 via a hose 6a, and the water pipe 42 of the discharge nozzle 37 is connected to the discharge pipe 9 via a hose 9a.

Further, a protrusion 45 is provided on the rear side of the suction / discharge unit 30, and an adsorption rubber 46 is attached to the tip thereof.

Next, the operation of the circulating water heater of this embodiment will be described.

When operating the circulating water heater for the first time, fill the bathtub with warm water and attach the suction / discharge unit 30 to the suction rubber 46.
Adsorb inside the bathtub so that it is located below the surface of the bath. Then, in order to fill the tank 1 and each of the pipes 6, 7, and 9 with water, the pump 5 is operated after injecting water from the suction pipe 6. At this time, since the tank 1 is filled with air, the water from the suction pipe 6 is injected into the tank 1 while pushing away the air in the tank 1. At this time, since the water level in the tank 1 is low and the air is present in the automatic air valve 20, the float is in the lowered position and the automatic air bleed valve 20 is open. Connection pipe connected to lid 11
It is exhausted to the outside through 23 and the automatic air vent valve 20. In addition, the connecting pipe 22 connected to the top of the discharge pipe 9
The air is also exhausted through the automatic air vent valve 20.

That is, since the air in the tank 1 is exhausted over a short distance without receiving resistance, the water from the injection pipe 7 quickly flows into the tank 1. Therefore, the tank 1 can be filled with water in a short time.

When the tank 1 is filled with water, the water is connected to the connecting pipes 22 and 23.
However, when water reaches the automatic air bleeding valve 20, the built-in float rises and the valve is closed. Therefore, no water is discharged from the automatic air vent valve 20.

In addition, when the operation of the pump 5 is started, the bath water A in the bathtub
Is sucked into the filter case 31 through the through hole 32a of the lower plug 32 of the suction / discharge unit 30, and the filter 33,3
As it passes 4, it will undergo some cleaning action. After passing through the filters 33, 34, the bath water A flows into the foot valve 36 and an upward water flow is generated. For this reason, the float 39 in the foot valve 36 is pushed upward by water pressure, but stops by contacting the pin 40 before the upper end of the float chamber 38d is closed by the float 39. Therefore, the bath water A in the bathtub is sucked up by the pump 5 without any trouble.

In this state, the bath water A in the bathtub is poured into the tank 1, purified by the purification filter 2 composed of the filtering material 2a, natural stone 2b, etc., heated by the heater 3 to an appropriate temperature, and then the bathtub again. Is discharged inside. That is, the bath water A is circulated through the circulating water heater to purify and heat the bath water A in the bathtub.

The purified and heated bath water A is discharged from the nozzle 37 of the suction / discharge unit 30. At this time, air is sucked out from the air pipe 43 by the ejector effect and discharged together with the purified and heated bath water A. As a result, a large number of bubbles are generated and the effect of a bubble bath is obtained. At this time, since it is discharged laterally from the nozzle 37 and is sucked into the filter case 31 from the bottom to the top, the circulation of the bath water A in the bathtub is promoted, and the temperature of the hot water is made uniform and the efficiency of purification is improved. Can be planned. Further, the filter case 31, the foot valve 36 and the nozzle 37
Since it is integrally configured, the device can be miniaturized and can be stably mounted in the bathtub without disturbing.

At this time, the tank 1 and the automatic air valve 20 are filled with bath water A, so the automatic air vent valve 20 is closed and the bath water A is discharged to the outside through the automatic air vent valve 20. There is no such thing.

Next, consider a case where the bath water A in the bathtub is drained to replace the bath water A. In addition, the pump 5 and the heater 3
The operation of etc. is stopped.

At this time, since there is no water flow in the foot valve 36 of the suction / discharge unit 30, the float 39 is pressed downward by its own weight and water pressure, and the lower end of the float chamber 38d is closed. Therefore, the bath water A in the pump 5 and the injection pipe 7 will not be discharged through the suction pipe 6.

Further, the bath water A in the tank 1 tries to flow out through the reverse U-shaped discharge pipe 9, but the automatic air vent valve 20 is connected to the top of the reverse U-shaped discharge pipe 9. Therefore, in lieu of the outflow of the bath water A in the discharge pipe 9, air flows into the pipe 9 from the tip of the hose 9a provided on the bathtub side, and the air accumulates in the automatic air valve 20. When the valve 20 is opened and air flows into the discharge pipe 9 from the outside, only the bath water A existing in the discharge side half of the pipe 9 is discharged, and the bath water A remains in the tank 1 side half. Become. That is, the bath water A remains in the tank 1 up to the height of the top of the inverted U-shaped discharge pipe 9. At this time, since the top of the inverted U-shaped discharge pipe 9 is arranged at a height corresponding to the top of the tank 1, most of the bath water in the tank 1 remains.

As described above, in the present embodiment, the tank 1 is constructed by combining the inverted U-shaped pipe 9 and the automatic air vent valve 20.
It is possible to prevent the internal bath water A from being discharged.

Therefore, when activating the circulating water heater next time, it is sufficient to simply turn on the circulating water heater and operate the pump 5, the heater 3 and the like.

That is, the bath water A remains in the pump 5 due to the action of the foot valve 36 of the suction / discharge unit 30, and the inverted U-shaped discharge pipe 9 and the automatic air bleed valve 20 remain in the tank 1.
Because of the action, the bath water A remains, so it is not necessary to inject water into the pump 5 every time it is restarted or fill the empty tank 1 with water as in the conventional case.

[Effect of device]

As described above, according to the present invention, since the discharge pipe has an inverted U shape and the automatic air vent valve is connected to the top of the discharge pipe, when the bath water is drained, the water level in the discharge pipe is lowered. As a result, the automatic air vent valve opens, and the air flows into the discharge pipe through this, so that the bath water in the tank does not flow out. In other words, the bath water remains in the tank up to the height of the top of the inverted U-shaped discharge pipe, and the time and effort required to fill the empty tank every time the circulating water heater is restarted are unnecessary. Therefore, it becomes possible to easily restart.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a circulating water heater according to an embodiment of the present invention,
2 is a partially cutaway plan view of the same, FIG. 3 is a partially cutaway front view of an intake / discharge unit used in the circulating water heater,
FIG. 4 is a partially cutaway side view of the same, and FIG. 5 is an explanatory view schematically showing the structure of a conventional circulating water heater. 1: Tank, 2: Purification filter 3: Heater, 4: Temperature sensing element 5: Pump, 6: Intake pipe 7, Inject pipe, 8, 9: Discharge pipe 10: Housing, 11: Lid 20: Automatic air Vent valve, 22,23: Connection pipe 30: Suction / discharge unit, 31: Filter case 33,34: Filter, 36: Foot valve 37: Discharge nozzle, 38: Cylindrical body 39: Float, 42: Water pipe 43: Air pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Masanori Okano 6-10-10-305, Torii, Jonan-ku, Fukuoka-shi, Fukuoka (56) References 14358 (JP, B2)

Claims (3)

[Scope of utility model registration request] 1. A circulation in which bath water in a bathtub is injected into a tank by a pump, purified and heated by a filter and a heater built in the tank, and then discharged into the bathtub through a discharge pipe. In the water heater, the discharge pipe has an inverted U shape, one end of the discharge pipe is connected to the lower portion of the tank, and the top of the discharge pipe is arranged at a height corresponding to the upper portion of the tank. ,
A float is arranged in the tubular body in the vertical movement direction on the top of the discharge pipe, and when air is present inside the tubular body, the float descends and the valve is opened so that the inside of the discharge pipe communicates with the outside air. A circulating water heater connected to an automatic air vent valve that raises the float and closes the valve when the water is filled. 2. The circulating water heater according to claim 1, wherein an upper end of the tank is connected to an input end of the automatic air vent valve. 3. The circulating hot water according to claim 1, wherein a suction pipe is connected to the suction side of the pump, and a foot valve is attached to the tip of the suction pipe. vessel.