JP3553339B2 - Prevention device for cooling hot water of recirculating circulation pipe - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for preventing hot water from being cooled except at the time of reheating by a water convection in an external bath kettle device capable of supplying hot water and reheating.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a bath kettle device capable of supplying hot water to a bath tub and reheating the bath is known.
FIG. 7 is an overall view of a conventional hot water heater and a reheatable bath kettle device,
FIG. 8 is an overall view of a conventional bath heating apparatus dedicated to reheating.
For example, as shown in FIG. 7, circulation paths 9 and 10 are provided from the bathtub 1 to the bath heat exchange can 3. The bath heat exchange can 3 is connected to a water supply pipe 12 through an on-off valve 11, and the on-off valve 11 and the burners 5.7 are connected to an on / off switch 16.
Then, at the time of bath hot water supply, the water is guided to the hot water supply heat exchanger 8 in the hot water supply heat exchanger can 4 through the water supply pipe 12, where the water is heated by the burner 7 and then opened. It is guided to the bath heat exchanger 6 in the bath heat exchange can 3 through the on-off valve 11, where it is further heated by the burner 5 and then flows into the bathtub 1 via the vertical circulation paths 9 and 10. I do.
[0003]
Further, the hot water from the burner 7 can be injected into the bathtub 1 from the hot water tap 14 through the hot water pipe 13 or used at the shower port 15. It can be mixed with water supply.
Also, at the time of bath reheating, the on-off valve 11 is closed and the burner 5 in the bath heat exchange can 3 is ignited, so that the high-temperature water which has been heated to a low specific gravity in the bath heat exchanger 6 has a low specific gravity. Rises and blows out into the bathtub 1 via the upper circulation path 10. At this time, since the inside of the bath heat exchanger 6 has a negative pressure, bathtub water flows from the bathtub 1 through the lower circulation path 9 into the bath heat exchanger 6. By this heat convection action, the water in the bathtub 1 is circulated and the temperature is raised.
FIG. 8 shows an example of a bath kettle device dedicated to reheating. The hot water in the heat exchange coil 30 is heated and heated by the burner 5, and as a result, is circulated and heated as in the example of FIG.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, after the burner 5 is extinguished to complete the reheating, the water in the bath heat exchange can 3 is cooled by the outside air, the specific gravity increases, and the downflow occurs. There is a problem that the water flows back into the bathtub 1 from the inside, and a convection reverse to that of the reheating occurs, so that the temperature of the water in the bathtub 1 that has risen is lowered.
Furthermore, there is a problem that the more the heating efficiency is improved, the more easily the bath heat exchange can 3 is cooled by the outside air.
[0005]
In addition, a check valve is provided at the entrance and exit of the bath heat exchange can body 3 in the circulation passages 9 and 10, and at the time of reheating, both the check valve and the steam expansion and heating function are used to perform the function of a pump and forcibly. A technique for circulating the temperature is disclosed in Japanese Utility Model Application Laid-Open No. 59-40755. In this case, although the backwater of the bathtub can be prevented from flowing backward when the reheating is completed, the check valve is liable to be clogged with the check valve in practical use. There has been a problem that convection due to circulation temperature rise is unlikely to occur.
[0006]
[Means for Solving the Problems]
The present invention uses the following means to solve the above problems.
In a bath-tank device comprising a heat exchange can body, an external bath kettle comprising a burner for heating the heat exchange can body, and a circulation path for circulating bath water in the heat exchange can body, hot water flows into the bath tub from the circulation path. In a configuration in which a check valve is removable in a bathtub outlet, or in a bathtub suction port in which cold water flows into a circulation path from inside the bathtub, or in a circulation path near both, the check valve is It comprises a valve body 27, a filter 28, and a fixture 29. The fixture 29 is formed in a pipe shape, a plurality of engagement holes 29a are provided on a side surface, and the valve body 27 is made of an elastic body and is formed in a substantially circular shape. According to the size of the inner circumference of the fixture 29, a plurality of projections 27a engaging with the engagement holes 29a are provided on the outer circumference, and cuts 27b are radially cut from the center in the circumferential direction. Is also formed in a substantially circular shape and the fixture 2 A plurality of projections 28a are provided on the outer periphery to engage with the engagement holes 29a, and a mesh is provided at the center portion. The order in which the filters 28 are arranged is reversed, and projections are fitted and fixed in the engagement holes 29a of the fixture 29 .
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an overall configuration diagram of a bath kettle device according to the present invention,
FIG. 2 is an overall view of a bath kettle device with a valve,
FIG. 3 is a sectional view of a check valve,
FIG. 4 is also a cross-sectional view of the check valve,
FIG. 5 is a three-dimensional exploded view of the check valve of FIG.
FIG. 6 is a side view thereof.
[0008]
In FIG. 1, the overall configuration of a bath kettle device according to the present invention is substantially the same as the conventional bath kettle device capable of hot water supply and reheating.
In the present invention, a check valve 19 is provided at an air outlet 18 arranged on the inner surface of the bathtub 1 of the upper circulation path 10. As a result, the inflow of high-temperature water in the upper part of the bathtub 1 from the outlet port 18 to the upper circulation path 10 can be prevented, so that the hot water before heating and heating in the lower circulation path 9 in the lower circulation path 9 generated when bath reheating is completed. Backflow phenomenon can be prevented.
The check valve is preferably provided near the suction port 17 and the air outlet 18.
[0009]
As shown in FIG. 3, the check valve 19 is configured such that a female screw is formed on an inner surface at an end of the upper circulation path 10 on the bathtub side, and a fastening seat 26 is screwed and fixed to the female screw. An outlet fitting 24 is screwed and fixed to the front side (inside the bathtub) of the fastening seat 26, and a mesh is provided around the side surface of the outlet fitting 24 to form a filter 24a.
Then, an outlet cover 23 is fixed to the surface of the outlet fitting 24 with screws, and a support shaft 31 is protruded from the center of the outlet fitting 24, and the spring 21 and the valve body 22 are mounted on the support shaft 31. When fitted, the valve body 22 makes the support shaft 31 slidable, and urges the front side of the fastening seat 26 to be closed by the urging force of the spring 21.
However, the biasing force of the spring 21 is extremely weak, and the hot water heated in the bath heat exchanger 6 in the bath heat exchange can 3 is weaker than the force flowing out by convection, and the valve body is used at the time of reheating. 22 is opened.
[0010]
In such a configuration, at the time of reheating, the water is warmed by the bath heat exchanger 6 in the bath heat exchange can 3 by the burner 5, and the high-temperature water that has passed through the upper circulation path 10 is shown in FIG. As shown in (2), the valve body 22 is pushed open, and flows into the bathtub 1 through the filter 24a from the gap between the wall of the bathtub 1 and the outlet cover 23.
When the reheating is completed and the burner 5 is extinguished, the flow of water in the upper circulation path 10 stops, and as shown in FIG. 3A, the valve body 22 is pressed against the fastening seat 26 by the spring 21 and the outlet is completely closed. Because of the blockage, the backflow phenomenon can be completely prevented.
Further, when the filter 24 is clogged with scale, the clogging can be easily removed by removing the outlet fitting 24.
[0011]
4, 5 and 6, another embodiment of the check valve 19 will be described.
The check valve 19 ′ comprises a valve body 27, a filter 28, a fixture 29, and a discharge fitting 25. The fixture 29 is formed in a pipe shape so as to fit into a fastening seat 26, and the outer periphery of the fastening seat 26 is provided. A female screw formed on the inner surface of the end portion of the lower circulation path 9 and the upper circulation path 10 so that the discharge port can be screwed and fixed to the front side of the fastening seat 26 (inside the bathtub). A metal fitting 25 is screwed and fixed so as to change the discharge direction of the hot water toward the wall of the bathtub 1 .
A plurality of engagement holes 29a are provided in the center of the side surface. The valve body 27 is made of an elastic body such as rubber or synthetic resin, and is formed in a substantially circular shape to match the size of the inner circumference of the fixture 29, and a plurality of projections 27a on the outer circumference that are engaged with the engagement holes 29a. And a cut 27b is made radially from the center in the circumferential direction.
The filter 28 is also formed in a substantially circular shape to match the size of the inner circumference of the fixture 29, and a plurality of projections 28a are provided on the outer circumference to engage with the engagement holes 29a, and a mesh is provided at the center. I have.
In the case of the suction port shown in FIG. 4B, the arrangement order of the valve element 27 and the filter 28 is reversed from that in the case of the outlet shown in FIG. As described above, the non-return valve for the outlet and the inlet can be assembled using the same parts because of the simple attachment, the low material cost, and the same parts.
[0012]
In such a configuration, at the time of reheating, the water is warmed in the bath heat exchanger 6 in the bath heat exchange can 3 by the burner 5, and the high-temperature water that has passed through the upper circulation path 10 passes through the filter 28. As shown by the two-dot chain line in FIG. 4 (a), the valve body 27 is pushed open, flows into the bathtub 1, and the check valve 19 'provided in the lower circulation path 9 is similarly opened.
When the reheating is completed and the burner 5 is extinguished, the flow of water in the upper circulation path 10 stops, the valve returns to its original state due to the elastic force of the valve body 27 itself, and the outlet is completely closed. If this happens, the valve body 27 is received by the filter 28, and the backflow phenomenon can be completely prevented.
Further, when the filter 28 is clogged with scale or the like, the clogging can be easily removed by removing the fixing tool 29. Similarly, repair and replacement of the entire check valve 19 'can be easily performed.
[0013]
Next, a description will be given of a bath kettle device provided with electromagnetic valves 20 in the lower circulation path 9 and the upper circulation path 10 and opened and closed by an on / off switch with reference to FIG.
Instead of the check valve 19, valves 20 are provided near the suction port 17 and the air outlet 18, respectively. These valves 20 are connected to an on / off switch 16, and are controlled by the on / off switch 16 to be opened during reheating and closed in synchronization with the extinguishing of the burner 5.
The valve 20 may be provided in either the lower circulation path 9 or the upper circulation path 10.
Therefore, the electromagnetic valves 20 are opened during the reheating by turning on the on / off switch 16, and the water in the bathtub 1 is warmed via the lower circulation path 9 and the upper circulation path 10. When the burner 5 is extinguished by turning off the on / off switch 16, the electromagnetic valves 20 and 20 are closed, the hot water cannot circulate in the lower circulation path 9 and the upper circulation path 10, and the hot water in the bathtub 1 cools without convection. Never speed up.
[0014]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
That is, a check valve and a filter are provided in either the inside of the tub outlet where hot water flows into the bathtub from the circulation path or the suction port in the bathtub where cold water flows into the circulation path from inside the bathtub, or in the circulation path near both. Since it is detachably provided integrally, the water cooled outdoors can be prevented from entering the bathtub except at the time of reheating by the check valve, and the water in the bathtub can be cooled by convection. It was.
In addition, the check valve and the filter can be integrally attached and detached, so that they can be easily removed and cleaned or replaced even if clogged with descaling, etc., and maintenance management can be performed easily. .
In addition, it is easy to install, the material cost is low, and the check valve for the outlet and the inlet can be assembled using the same parts.
[Brief description of the drawings]
FIG. 1 is an overall view of a bath kettle provided with a check valve according to the present invention.
FIG. 2 is an overall view of a bath kettle device provided with a valve.
FIG. 3 is a sectional view of a check valve and a mounting portion thereof.
FIG. 4 is a sectional view of a simple type check valve and a mounting portion thereof.
FIG. 5 is a three-dimensional exploded view of a simple type check valve.
FIG. 6 is a side view of a simple type check valve.
FIG. 7 is an overall view of a conventional bath kettle device capable of hot water supply and reheating.
FIG. 8 is an overall view of a conventional bath kettle apparatus dedicated to reheating.
[Explanation of symbols]
2 External bath kettle 9 Lower circulation path 10 Upper circulation path 17 Suction port 18 Blow-out port 19 Check valve 20 Valve

Claims (1)

In a bath-tank device comprising a heat exchange can body, an external bath kettle comprising a burner for heating the heat exchange can body, and a circulation path for circulating bath water in the heat exchange can body, hot water flows into the bath tub from the circulation path. In a configuration in which a check valve can be attached to or detached from a blowout port in a bathtub, or a suction port in a bathtub into which cold water flows into a circulation path from inside the bathtub, or a circulation path near the both ,
The check valve includes a valve body 27, a filter 28, and a fixture 29. The fixture 29 is formed in a pipe shape, a plurality of engagement holes 29a are provided on a side surface, and the valve body 27 is made of an elastic body. A plurality of projections 27a are provided on the outer periphery of the fixing member 29 so as to be engaged with the engaging holes 29a, and cut radially from the center in the circumferential direction. It was placed,
The filter 28 is also formed in a substantially circular shape to match the size of the inner circumference of the fixture 29, and a plurality of projections 28a that engage with the engagement holes 29a are provided on the outer circumference, and a mesh is provided at the center portion,
The arrangement of the valve body 27 and the filter 28 is reversed between the inlet port and the outlet port, and a projection is fitted and fixed in the engaging hole 29a of the fixing tool 29 . Hot water cooling prevention device.

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