JP2551884B2 - Hot water circulation device for bath with boiler - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water circulation device for a bath, in which bath water in a bath is circulated, heated by a boiler to heat it to a comfortable temperature, and further, hot water is clarified by a filter member. Regarding

[0002]

2. Description of the Related Art A hot water circulating device for a bath has been developed, in which hot water in a bath is continuously circulated through a filter member for 24 hours to be kept clear and bathed at any time. This device measures the temperature of hot water and heats it to a constant temperature, and also removes dirt, bacteria, etc. contained in the hot water and keeps it clear.

A circulating water heater for a bath which can be used without replacing it with fresh water every day can satisfy both characteristics of water saving and energy saving at the same time. In addition, you can take a bath anytime you like 24 hours a day and use it very conveniently.

[0004] In this type of bath, the heater is maintained at a set temperature by a heater, and the hot water is continuously filtered for 24 hours by a filtering member to be kept clear. In order to realize this, the hot water circulation device includes a circulation pump, a heater, and a filtration member in the hot water circulation path. The heater is controlled by a temperature sensor to heat the hot water to a constant temperature. The heater has a drawback that the amount of heat generated is as small as 1000 Kcal or less per hour, and it takes time to heat the bath water to an appropriate temperature when it is replaced. Further, if the bath water is kept at the set temperature for 24 hours by the heater, there is a drawback that the running cost becomes high. .

An apparatus using a boiler that burns kerosene or heavy oil instead of an electric heater can reduce running costs. This is because kerosene and heavy oil are cheaper than electric heating. In addition, the amount of heat generated by the boiler is extremely large, and it has the advantage that the heating time of hot water can be significantly shortened.

[0006]

However, when the bath water is heated by the boiler, the boiler is ignited,
There is a drawback that hot water is sprayed from the circulation pipe into the bathtub, making it difficult to bathe comfortably. This is due to the large amount of heat generated by the boiler. In order to solve this drawback, the present inventor has developed a hot water circulating device for a bath shown in FIG. 6 (Japanese Patent Laid-Open No. 3-32914). In this device, temperature sensors 6 and 5 are provided on the suction side and the discharge side of the circulation pipe 4. The temperature sensor 6 on the suction side operates the boiler 3 when the temperature of the bath water is equal to or lower than the set temperature. The temperature sensor 5 on the discharge side stops the operation of the boiler 3 when the temperature of the hot water to be sprayed reaches a certain level or above so that hot water is not sprayed into the bathtub.

Since this apparatus controls the operation of the boiler 3 at the injection temperature, it is possible to prevent hot water from being injected. However, this structure has a drawback that the boiler frequently repeats ignition and extinction. It is because when the boiler is ignited for a certain period of time and the temperature on the suction side is below the set temperature, the injection temperature rises, the boiler is extinguished, and this process is repeated many times Is kept constant.

This drawback can be solved by reducing the amount of heat generated by the boiler. However, it is extremely difficult for a boiler equipped with a gun-type burner used for this type of application to have a calorific value of 15,000 Kcal or less. This type of burner requires the use of extremely thin nozzles in order to reduce the amount of heat generated. No matter how thin the nozzle is, as long as the fuel is injected from here, its flow rate is 1 hour per hour.
It is extremely difficult to make it less than liter (17 cc when converted to 1 minute). For this reason, the amount of generated heat is so large that it cannot be compared with the electric heater.

The present inventor has developed a boiler having a unique structure in order to lengthen the ignition time of the burner despite the large amount of heat generated. This boiler does not heat the bath water directly with the burner. The bath water is indirectly heated through a heat exchange pipe in a hot water chamber provided in the boiler. For this reason, the boiler has a structure in which a hot water chamber is heated by a burner and a heat exchange pipe is connected to the hot water chamber.

In the boiler having this structure, the ignition time of the burner can be lengthened by increasing the capacity of the hot water chamber. This is because the burner extinguishes the fire after heating a large amount of hot water stored in the hot water chamber. Therefore, the boiler having this structure has the advantages that the disadvantage that the burner is frequently ignited and extinguished can be solved, thermal efficiency can be increased, and that the life of the boiler can be extended and maintenance can be simplified.

However, the boiler of this structure has a drawback that the temperature of bath water cannot be controlled by turning the burner on and off. This is because if hot water is constantly circulated in the heat exchange pipe of the hot water chamber, the bath water is heated by the heat exchange pipe even after the burner is extinguished. Therefore, the boiler of this structure needs to connect the bypass passage in parallel with the heat exchange pipe. The bath water can be circulated by switching between the bypass passage and the heat exchange pipe to maintain a constant temperature. Bath water circulated in the bypass is not heated. The bath water circulated in the heat exchange pipe is heated. Therefore, when the bath water falls below the set temperature, it circulates in the heat exchange pipe, and when it rises above the set temperature, it circulates in the bypass passage so that it can be maintained at a constant temperature.

The device of this structure has a feature that the operation time of a boiler that generates a large amount of heat can be extended. However, the device of this structure has a drawback that hot water is temporarily injected from the heat exchange pipe when the bypass passage is switched to the heat exchange pipe.

This drawback is caused by, for example, the actual construction of Sho 63-520.
As described in Japanese Patent Publication No. 43-43, in parallel with the heat exchange pipe.
This can be solved with a structure that connects bypass paths. In this bulletin
The bath-fired device to be mounted is shown in FIG. The device in this figure
The bath water circulated by the circulation pump 1 is used as the heat exchange pipe 9.
It is diverted to the bypass 11 and circulated. With circulation pump 1
The heat exchange pipe 9 and the bypass passage 11 have a shunt water split ratio.
Is connected to the automatic mixing valve 22 for adjusting the. Automatic
The mixing valve 22 keeps the temperature of the circulating bath water high.
The amount of circulating water in the heat exchange pipe 9
Increase the amount of circulating water in the bypass 11, and conversely the bath water
Circulation of the heat exchange pipe 9 as the temperature of
Control the amount of circulating water in bypass 11 to be small by increasing the amount of water
I do.

The automatic mixing valve 2 which operates in this way
2 has the internal structure shown in FIG. This automatic mix
The ring valve 22 collects the bath water flowing from the lower end port 23,
It is branched to the branch ports 24 provided on both sides and discharged. both sides
In order to control the diversion ratio of diversion to the branch port 24 of
Built-in thermoelement TH25. Thermoele
Ment TH25 is bath water flowing in from the lower end port 23.
At that temperature, the mixing valve 26 is forced down. Mixing valve 26
Is elastically pushed up by the spring 27,
Move to the vertical position where the thermo element TH25 is in balance.
Be moved. The thermoelement TH25 has a lower end port 2
When the temperature of the bath water of 3 becomes high, the mixing valve 26 is moved downward.
To increase the flow rate of the branch port 24 on the left,
Reduce the flow rate at the branch port 24. When this happens,
The flow rate in the bypass 11 is larger than that in the heat exchange pipe 9.
Therefore, the bath water heating of the heat exchange pipe 9 is reduced. Anti
On the other hand, if the temperature of the bath water at the lower end port 23 becomes
Raise the joint valve 26 to increase the flow rate of the right branch port 24.
To reduce the flow rate at the left branch port 24
The flow rate of the heat exchange pipe 9 is set to be larger than that of the passage 11 so that the bathtub
Effectively heats water.

With the automatic mixing valve 22 of this structure,
The device that diverts the bath water to the passage 11 is an automatic mixing
The temperature of the bath water can be controlled to the set temperature by the valve 22. Was
I, bath-fired unit of the structure of this, the habitat of microorganisms Fi
Circulate the bath water continuously for 24 hours in the luther
If you use it for a hot water circulation device for a bath that allows you to bathe even one,
Very difficult to achieve high reliability over many years
There are serious drawbacks. Microbes inhabiting the bathtub water
Is kept clear for 24 hours and continuously operated for 365 days.
The hot water circulation device allows you to take bath water every day.
Extremely long compared to the bath heating device that replaces it
Operated continuously for hours. For this reason, long years of continuous luck
Extremely high reliability that can be turned is required.

As shown in FIG . 8, the automatic mixing valve 22
Is the balance between the spring 27 and the thermoelement TH25
Controls bath water to a set temperature with, and realizes this
Due to the complicated structure for
It is extremely difficult to guarantee normal operation. Especially springs
It is very difficult to eliminate the aging of the elastic body of
Yes. If the elasticity of the spring changes, the set temperature will also change.
U. Furthermore, the automatic mixing valve of this structure can be used for 24 hours.
Used for a device that continuously circulates bath water to control the set temperature.
When used, the mixing valve of the automatic mixing valve will adjust the temperature of bath water
Is moved up and down with a fine stroke by the bathtub
It will control the temperature of the water. The temperature of the bath water is
Because it does not change so much. Change the bath water every day
The equipment for heating with a boiler is
Then, heat to an appropriate temperature of about 40 ° C. In contrast, 24
Operate continuously for hours so that you can take a bath anytime every day
Since the hot water circulation device for bath does not replace the bath water,
The bath water temperature is always close to the set temperature. others
Therefore, the flow rate of the bypass passage of this device is adjusted by the automatic mixing valve.
When adjusted with, the vertical movement of the mixing valve becomes extremely small.
Mixing valves that move up and down with fine strokes have been used for many years.
Large friction resistance when used and moving up and down
When this happens, you will not be able to move to the normal position and the bath water will be
Cannot adjust to a constant temperature. Because of this, automatic mixing
A device that continuously changes the volume ratio of the bypass passage with a valve is 2
Used as a hot water circulation device for a bath that is used continuously for 4 hours
Then, for a long time, it is best to adjust the bath water to the set temperature.
And there are difficult evils.

This problem is caused by using a switching valve that opens and closes.
The circulating bath water to the bypass and heat exchange pipes.
It can be solved by replacing and circulating. Off to open and close
The exchange valve is the same as the automatic mixing valve 22 shown in FIG.
Do not continuously control the volume ratio of the bypass and heat exchange pipes.
Yes. It can be switched between two states, open and closed.
The structure can be simple. Can be switched between open and closed states
The directional control valve has a simple structure and operation, so there are few failures.
It can guarantee normal operation over many years. Yes
Even if the frictional resistance of the moving part becomes large,
Since it is switched, a strong force can be applied to the valve body with a motor or electromagnet.
This is because it can be driven to two positions and switched.

Therefore, a switching valve for opening and closing,
Using a switching valve that cannot adjust the opening
For baths that switch the circulation path of the bath water between the bypass and the bypass
The hot water circulation device of the
A feature that can reduce maintenance and simplify maintenance.
There is a long. However, the hot water circulation device of this structure is
As mentioned above, hot water is discharged immediately after switching the switching valve.
There is a drawback.

The present invention was developed with the object of solving this drawback, and the important object of the present invention is to:
Use amount of generated heat is large burner, can extend the operating time of the burner, furthermore, with hot water from the circulation pipe on the discharge side from being injected, it communicates years 24 hours
Continue operation to reduce failures and simplify maintenance
It is to provide a hot water circulation device for a bath having a continuous boiler.

[0020]

A hot water circulating apparatus for a bath having a boiler of the present invention has the following constitution in order to achieve the above object. (A) A hot water circulation device for a bath includes a boiler 3 and a hot water circulation passage connected to a bath via a circulation pipe 4. (B) The boiler 3 uses hot water heated by the burner 7.
The hot water chamber 8 for storing and the hot water chamber 8 which is immersed in the hot water chamber 8 are heated by the burner 7 via the hot water in the hot water chamber 8.
The heat exchange pipe 9 is provided. (C) The circulation pump 1 and the filtering member 2 are provided in the hot water circulation path.
And the heat exchange pipe 9 are connected in series. (D) The circulation pump 1 is continuously operated for 24 hours,
Bath water is continuously circulated through the filtering member 2. (E) The filtering member 2 contains porous natural stone,
Bath water circulated by the action of microorganisms that inhabit this natural stone
To keep it clear. (F) A hot water circulation path on the inflow side of the heat exchange pipe 9
The temperature sensor 1 for detecting the temperature of the bath water circulating
0 is provided. (G) The heat exchange pipe 9 has a switching valve 12 that opens and closes.
The bypass paths 11 are connected in parallel via the. (H) The heat exchange pipe 9 and the bypass 11 are circulated.
Switch the bathtub water to the heat exchange pipe 9 and the bypass 11.
The switching valve 12 for circulating the circulation is connected. (I) The control means 13 for controlling the switching valve 12 by the input signal of the temperature sensor 10 is provided. (J) The control means 13 opens the switching valve 12 on the bypass passage 11 side when the temperature of the bath water is equal to or higher than the set temperature, and closes the switching valve 12 on the heat exchange pipe 9 side to pass the bath water to the bypass passage. 1
1, the switching valve 12 on the side of the bypass 11 is closed and the switching valve 12 on the side of the heat exchanging pipe 9 is opened to circulate the bath water through the heat exchanging pipe 9 when the temperature is lower than the set temperature. Immediately before the switching valve 12 on the pipe 9 side is opened, the heat exchange valve is opened.
Switching valve 12 on the side of the ip 9 and switching valve 12 on the side of the bypass 11
The bath water is circulated in both the heat exchange pipe 9 and the bypass passage 11 by controlling the valve to be opened.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below are examples of a hot water circulation device for a bath for embodying the technical idea of the present invention, and the device of the present invention is made of materials, shapes, and
The structure and arrangement are not limited to the following structures. The device of the present invention can be variously modified within the scope of the claims.

Further, in this specification, in order to facilitate understanding of the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “means for solving the problems”. Column). However, the members shown in the claims are not limited to the members of the embodiment.

A hot water circulating device for a bath having a boiler shown in FIG. 1 has a boiler 3 and a circulation pipe 4
It has a hot water circulation path connected to the bathtub via. A circulation pump 1, a filtration member 2, and a boiler 3 are provided in the hot water circulation path.
And the heat exchange pipe 9 are connected in series.

The boiler 3 has a gun-type burner 7 for burning kerosene, a watertight hot water chamber 8 heated by the burner 7, and hot water stored in the hot water chamber 8 connected to the hot water chamber 8. It is provided with a heat exchange pipe 9 that is heated through. A warm water chamber temperature sensor 14 is provided in the warm water chamber 8, and the operation of the burner 7 is controlled by the warm water chamber temperature sensor 14 to control the water temperature of the warm water chamber 8 within a certain range. When the water temperature in the warm water chamber 8 falls below the set value, the burner 7 is ignited to raise the water temperature in the warm water chamber 8. When the water temperature in the warm water chamber 8 is heated to the set temperature or higher, the operation of the burner 7 is stopped. The water temperature of the warm water chamber 8 is preferably set in the range of 70 to 90 ° C.

The hot water chamber 8 of the boiler 3 is connected to a water pipe via a supply valve. Further, the warm water chamber 8 has a water supply valve 15
Is connected to the bathtub via. As described above, in the device in which the hot water chamber 8 is connected to the bathtub, the hot water in the hot water chamber 8 can be directly supplied to the bathtub by opening the water supply valve 15. This device has the feature that it can quickly supply new hot water to the bathtub. The hot water circulation device of the present invention can be continuously used for several months without changing bath water every day,
The bath water may be replaced if the filter is washed or if a large amount of foreign matter is added to the bath water. In this case, hot water can be supplied from the hot water chamber 8 to quickly supply hot water to the bathtub. The hot water in the hot water chamber 8 can also be used for hot water supply in a kitchen or the like.

Since the filtration member 2 and the circulation pump 1 are connected in series to the heat exchange pipe 9 and connected to the bath, the bath water can be circulated there to heat the pipe. When the bath water becomes higher than the set temperature and the bath water is circulated through the heat exchange pipe 9, the bath water is heated to a higher temperature. A normal bath water heating device can stop the circulation of bath water when the temperature of the bath water reaches a set temperature. However, the device of the present invention cannot stop the circulation of bath water in any case. This is because the bath water is continuously filtered by the filtration member 2 for 24 hours to keep the bath water clear without exchanging it.

In order to prevent the bath water from circulating through the heat exchange pipe 9 without stopping the circulation of the bath water, a bypass passage 11 is connected to the heat exchange pipe 9 via a switching valve 12. The switching valve 12 selectively switches the bath water to the heat exchange pipe 9 and the bypass passage 11 to circulate it. When the temperature of the bath water falls below the set temperature, the switching valve 12 circulates the bath water in the heat exchange pipe 9 to heat it. When the water temperature of the bath water reaches or exceeds the set temperature, the switching valve 12 circulates the bath water in the bypass passage 11 and stops the heating by the heat exchange pipe 9.

In the apparatus shown in FIG. 1, a switching valve 12 is connected in series to the bypass passage 11 and the heat exchange pipe 9. The two switching valves 12 circulate bath water on the opened side. When the switching valve 12 connected to the bypass passage 11 is opened and the switching valve 12 connected to the heat exchange pipe 9 is closed, the bath water is circulated in the bypass passage 11. On the contrary, when the switching valve 12 connected to the bypass passage 11 is closed and the switching valve 12 of the heat exchange pipe 9 is opened, the bath water is circulated in the heat exchange pipe 9.

As the switching valve 12, an electromagnetic valve opened and closed by the control means 13 is used. The control means 13 detects the temperature of the bath water with the temperature sensor 10 and controls the opening and closing of the two switching valves 12. The temperature sensor 10 is provided inside the circulation pipe 4 on the suction side of the heat exchange pipe 9 and the bypass passage 11, and detects the temperature of the bath water.

The control means 13 detects the temperature of the bath water with the temperature sensor 10 and controls the switching valve 12 in the following state.

When the water temperature of the bath water is equal to or higher than the set temperature, the switching valve 12 of the heat exchange pipe 9 is closed. The switching valve 12 on the side of the bypass passage 11 is opened. In this state, the bath water flows into the bypass passage 11. Circulated. The bypass passage 11 circulates the bath water without heating it. At this time, since the hot water in the heat exchange pipe 9 provided in the hot water chamber 8 is not circulated, it is heated to a considerably high temperature by the hot water in the hot water chamber 8 and becomes hot water.

At the moment when the water temperature of the bath water drops below the set temperature, the switching valve 12 of the heat exchange pipe 9 is opened ... The switching valve 12 of the bypass passage 11 is opened ... In this state, the heat exchange pipe 9 is opened. The accumulated hot water is supplied to the bathtub. However, in this state, not only the hot water in the heat exchange pipe 9 but also the bypass 1
Since hot water is also supplied from 1, the hot water accumulated in the heat exchange pipe 9 is mixed with the hot water in the bypass passage 11 to lower the temperature and is circulated in the bath. This state is continued until the hot water is completely discharged from the heat exchange pipe 9.

After the hot water is discharged from the heat exchange pipe 9, when the water temperature of the bath water is lower than the set temperature, the switching valve 12 of the heat exchange pipe 9 is opened. The switching valve 12 of the bypass passage 11 is closed. Valve In this state, bath water is circulated through the heat exchange pipe 9 and is heated by the hot water in the hot water chamber 8 via the heat exchange pipe 9. After that, when the bath water is heated above the set temperature,
In this state, the switching valve 12 of the heat exchange pipe 9 ... closed, the switching valve 12 of the bypass 11 side ... opened, and the following conditions are repeated to keep the bath water at a constant temperature.

In the hot water circulation device for a bath shown in FIG. 2, a three-way valve is used as the switching valve 12. The operating state of the three-way valve is shown in FIGS. The switching valve 12 includes a rotor 16 inside a casing, which is rotated by a reduction motor (not shown). The rotor 16 penetrates the hot water passage in the diameter direction. The outer circumference of the rotor 16 slides on the inner circumference of the casing 17 in a watertight state. Casing 17
Ports 18 and 19 for connecting the bypass passage 11 and the heat exchange pipe 9 are opened at a position of 90 degrees with respect to the center. On the opposite side of both ports 18, 19 is opened a port 20 in the center thereof which connects to the circulation pump 1.

As shown in FIG. 3, when the rotor 16 is rotated to a position where the hot water passage is horizontal, the port 18 of the heat exchange pipe 9 is connected to the port 20 of the circulation pump 1.
When the rotor 16 is rotated 45 degrees from this position, as shown in FIG.
The port 20 of the circulation pump 1 is connected to the ports 18 and 19 of both the heat exchange pipe 9 and the bypass passage 11, as shown in FIG. When the rotor 16 is further rotated 45 degrees,
As shown in FIG. 5, the port 19 of the bypass passage 11 is connected to the port 20 of the circulation pump 1. In the switching valve 12 having this structure, only the heat exchange pipe 9 is provided on the suction side of the circulation pump 1 by rotating the rotor 16 by the reduction motor (FIG. 3) and the bypass passage 11 (FIG. 4). 11 (FIG. 5) can be connected.

The rotation of the reduction motor for rotating the rotor 16 of the switching valve 12 is controlled by the control means 13. Similar to the switching valve 12 of FIG. 1, the control means 13 connects the circulation pump 1 only to the bypass passage 11 when the water temperature of the bath water is equal to or higher than the set temperature, and immediately after the water temperature of the bath water drops below the set temperature. Is connected to both the bypass passage 11 and the heat exchange pipe 9 until the hot water of the heat exchange pipe 9 is discharged, and after the hot water of the heat exchange pipe 9 is discharged, When only the heat exchange pipe 9 is connected and the water temperature of the bath water rises above the set temperature, the heat exchange pipe 9 is switched to the bypass 11 and this operation is repeated to keep the temperature of the bath water at the set temperature.

The circulation pump 1 sucks the hot water in the bath and forcibly circulates it in the hot water circulation path. Therefore, the suction side of the circulation pump 1 is connected to the suction port of the bath via the switching valve 12 and the heat exchange pipe 9, and the discharge side is connected to the bath via the filtering member 2. The circulation pump 1 is operated continuously for 24 hours.

The filtering member 2 filters the warm water in the bath clarified. The filtering member 2 has a built-in material for clarifying hot water. As the slag material, a material obtained by crushing porous natural stone into particles or a material obtained by crushing natural stone and sintering it into a porous material can be used. This material has a comfortable environment for the propagation of microorganisms, and aerobic microorganisms are parasitized. Microorganisms eat ammonia and proteins contained in warm water as food and decompose. Therefore, sweat and dirt in the warm water are effectively removed by the microorganism, and the warm water is kept clear. When foreign matter accumulates on the filtration member 2 and the amount of circulating hot water decreases, the fining action decreases.

In the apparatus shown in FIGS. 1 and 2, a primary filter 21 is connected to the suction port of the circulation pipe 4. The primary filter 21 filters the hot water sucked into the hot water circulation path to remove foreign substances such as hair and organic soft material. The primary filter 21 is a filter material that physically filters hot water, for example,
Built-in materials such as open-cell synthetic resin foam, non-woven fabric, filter paper, wire mesh, etc.

[0040]

INDUSTRIAL APPLICABILITY The hot water circulation device for a bath according to the present invention has a feature that the operating time of the burner can be lengthened even though a large-capacity boiler is used, and that hot water is not injected into the bathtub. is there. It heats the bath water that is circulated to the heat exchange pipe through the hot water in the hot water chamber without the burner directly heating the bath water, and further, the circulation route of the bath water is changed from the bypass passage to the heat exchange pipe. This is because the bath water is temporarily circulated in both the bypass passage and the heat exchange pipe when switching.

In the apparatus of this structure, the burner heats the warm water stored in the warm water chamber. The hot water in the hot water chamber can have a wide range between the minimum temperature and the maximum temperature. This is because the temperature of the bath water can be controlled to a constant temperature even if the set temperature of the hot water chamber is greatly changed. The amount of warm water stored in the warm water chamber can be increased by increasing the volume of the warm water chamber. Therefore, the burner can heat a large amount of hot water in a large temperature range, and the ignition time can be lengthened.

Further, when the temperature of the bath water drops, the circulation path is switched from the bypass path to the heat exchange pipe.
At this time, the bath water stored in the heat exchange pipe is jetted into the bathroom. The bath water in the heat exchange pipe is not circulated while the bath water is circulated in the bypass passage. Therefore, in this state, the hot water in the heat exchange pipe is heated to a temperature almost the same as the hot water temperature in the hot water chamber. Therefore,
When the bath water of the heat exchange pipe is directly jetted into the bath, the hot water is jetted. In order to eliminate this drawback, the device of the present invention connects both the heat exchange pipe and the bypass passage in parallel and circulates in the bypass passage when supplying the bath water with the heat exchange pipe stored therein. The bathtub water is mixed with the bathwater circulated in the heat exchange pipe so as to circulate. Therefore, the temperature of the bath water in the heat exchange pipe is lowered by the bath water in the bypass passage, and the bath water can be supplied to the bath without being brought into the hot water state.

Furthermore, the hot water circulating apparatus for bath according to the present invention
The notable feature of the device is that it has a simple structure that opens and closes.
Using a replacement valve, and eliminating the injection of hot water,
In addition, the temperature of the bath water can be controlled by operating continuously for 24 hours for many years.
Maintenance is simplified by reducing the breakdown of the control mechanism
There is something you can do. It is the hot water circulation for the bath of the present invention.
The device splits the bath water into the bypass and heat exchange pipe.
For causing, by using the switching valve you opened and closed, continuous
Switching without using a valve to adjust the diversion ratio of bath water
Immediately after switching the valve, the bypass passage and heat exchange pipe
Divide the bathtub water into both sides, and
This is because the water in the bathtub on the path is mixed and circulated in the bathtub.
It In addition, the hot water circulation device with this structure
When the temperature falls below the set temperature, heat the bath water
Since it circulates in the pipe, the boiler water can be used efficiently in the boiler.
You can heat up, and if the bath water becomes higher than the set temperature
The bathtub water is circulated through the bypass passage, so the heat exchange
Heat dissipation from the pipes connected to the
There is also a feature that can improve the thermal efficiency.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a hot water circulation device for a bath having a boiler showing an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a hot water circulation device for a bath having a boiler showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an example of a switching valve in which a circulation pump is connected to a heat exchange pipe.

FIG. 4 is a sectional view showing an example of a switching valve in which a circulation pump is connected to a heat exchange pipe.

FIG. 5 is a sectional view showing an example of a switching valve in which a circulation pump is connected to a heat exchange pipe.

FIG. 6 is a schematic block diagram of a hot water circulation device for a bath having a conventional boiler.

FIG. 7 is a schematic view of a bath heating device having a conventional boiler .
Lock diagram

FIG. 8 is an automatic mixer used in the bath heating apparatus shown in FIG .
Sectional view of the sing valve

[Explanation of symbols]

1 ... Circulation pump 2 ... Filtration member 3
… Boiler 4… Circulation pipe 5… Temperature sensor 6
… Temperature sensor 7… Burner 8… Hot water chamber 9
… Heat exchange pipe 10… Temperature sensor 11… Bypass 1
2 ... Changeover valve 13 ... Control means 14 ... Hot water chamber temperature sensor 1
5 ... Supply valve 16 ... Rotor 17 ... Casing 1
8 ... Port 19 ... Port 20 ... Port 2
1 ... Primary filter 22 ... Automatic mixing valve 23 ... Lower end port 23 ... Branch port 25 ... Thermo element TH 26 ... Mixing valve 27 ... Spring

Claims (1)

(57) [Claims] 1. A hot water circulation device for a bath, which has a boiler having all the configurations (a) to (j) below. (A) A hot water circulation device for a bath includes a boiler (3) and a hot water circulation passage connected to a bath via a circulation pipe (4). (B) a boiler (3) is heated by a burner (7)
That warm water chamber for storing hot water (8), immersed in the hot water chamber (8)
It is piped in the state of being soaked, and the hot water in the hot water chamber (8)
And a heat exchange pipe (9) that is heated by the burner (7) . (C) A circulation pump (1), a filtration member (2), and a heat exchange pipe (9) are connected in series to the hot water circulation path. (D) The circulation pump (1) is operated continuously for 24 hours.
Then, the bath water is continuously circulated through the filter member (2). (E) The filtering member (2) contains porous natural stone
A bath circulated by the action of microorganisms that inhabit this natural stone
Keep the tank water clear. (F) The flow of the heat exchange pipe (9) in the hot water circulation path
A temperature sensor (10) for detecting the temperature of circulating bath water is provided on the entrance side . (G) A bypass path (11) is connected in parallel to the heat exchange pipe (9) through a switching valve (12) that opens and closes . (H) The bath water circulated in the heat exchange pipe (9) and the bypass passage (11) is bypassed to the heat exchange pipe (9).
A switching valve (12 ) for switching and circulating the path (11) is connected. (I) The switching valve (1
The control means (13) for controlling 2) is provided. (J) The control means (13) opens the switching valve (12) on the bypass passage (11) side when the temperature of the bath water is equal to or higher than the set temperature, and the switching valve (12) on the heat exchange pipe (9) side. Close the
The bath water is circulated through the bypass passage (11), and at the set temperature or less, the switching valve (1
2) is closed and the switching valve (1) on the heat exchange pipe (9) side is closed.
2) is opened and bath water is circulated through the heat exchange pipe (9).
Was, immediately before the heat exchange pipe (9) side of the switching valve (12) is opened is a bi <br/> path channel heat exchanger pipe (9) side of the switching valve (12) (11) side of the The switching valve (12) is controlled to open so that the bath water flows into the heat exchange pipe (9) and the bypass passage (1).
It is configured to circulate in both 1).