JP2504377Y2 - Hot water circulation device for bath with burner - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water circulating device for a bath in which hot water in a bath tub is circulated and heated by a burner to an appropriate temperature, and the filtering member keeps the hot water clear.

[0002]

2. Description of the Related Art Hot water in a bathtub is continuously circulated for 24 hours,
A hot water circulation device for a bath that can be taken at any time has been developed. The apparatus measures the temperature of the hot water and heats it to a certain temperature, and removes dirt, bacteria, and the like contained in the hot water and keeps it clear.

In this type of bath, it is not necessary to heat the water by replacing it with fresh water every day. Therefore, both water saving and energy saving characteristics can be satisfied at the same time. Furthermore, it has the extremely convenient feature that you can take a bath 24 hours a day at any time.

In this type of bath, the hot water is continuously filtered for 24 hours by the filter member to keep it clear. Therefore, the filter member is required to have the characteristic of being able to filter hot water for a long time.
The conventional hot water circulation device has a circulation pump in the hot water circulation path,
A heater and a filtering member are provided. The heater is controlled by a temperature sensor to heat the hot water to a constant temperature. A heater of about 1 kW is usually used. A 1 KW heater produces 860 kcal of heat per hour. It takes about 7 hours to raise the temperature of 200 liters of water by 30 ° C. with this heater. Therefore, it is preferable that the device for heating the hot water with the heater supplies the hot water when the hot water in the bathtub decreases during bathing. This is because when the water is replenished, the temperature of the hot water is lowered and it takes time to warm the temperature to the set temperature. The heating time can be shortened by increasing the capacity of the heater to, for example, 2 to 3 KW. However, if the heater capacity is large, it cannot be connected from an ordinary outlet and requires dedicated wiring, which makes wiring work difficult. Further, since the device heats the hot water temperature to the set value continuously for 24 hours, the heater consumes electric power to heat the hot water.

An apparatus using a burner instead of a heater is described in Japanese Utility Model Application Laid-Open No. 57-58840.
Since this device heats hot water with a burner, it has the features that the running cost can be reduced and the heating time of the hot water can be significantly shortened.

[0006]

In the device described in this publication, the circulation pipe connected to the bath has a double structure. The central pipe of the circulation pipe is connected to the filtration means. The outer peripheral pipe of the circulation pipe is connected to a burner for a bath kettle. The device of this structure requires a special structure for the circulation pipe connected to the bathtub, and has a drawback that the installation work is troublesome. Further, since hot water cannot be forcibly circulated in the burner, there is a drawback that hot water of high temperature flows out from the circulation pipe.

The present inventor has further developed a hot water circulating device for a bath shown in FIG. 4 in order to solve this drawback. Since this apparatus connects the circulation pump 1, the filtration member 2 and the oil burner 3 in series, it can use a normal circulation pipe, and further has a feature that the circulation pump 1 can force-flow into the burner 3.

[0008] However, when actually manufactured and tested, this device has a drawback that the hot water temperature cannot be controlled to a constant temperature. In particular, when a small bathtub is used, there is a drawback that the hot water temperature fluctuates greatly, and there is a drawback that the bath cannot be comfortably bathed. The reason is that the latent heat of the oil burner 3 heats the hot water temperature higher than the set temperature. That is, in the case of a small tub, even if the hot water reaches the set temperature and the operation of the oil burner 3 is stopped, the hot water is heated by the latent heat stored in the burner 3 and the temperature further rises.

If the capacity of the oil burner 3 can be reduced, this drawback can be solved. However, the gun-type burner used for this type of application has a heating value of 15
It is extremely difficult to make it below 000 Kcal. The gun type burner is designed to reduce the amount of heat generated.
It is necessary to use extremely thin nozzles. However, no matter how thin the nozzle is, it is extremely difficult to reduce the flow rate to 1 liter per hour (17 cc when converted to 1 minute) or less as long as the fuel is injected from here. For this reason, the amount of generated heat is so large that it cannot be compared with the electric heater. The oil burner, which generates a large amount of heat, can heat the water in the bathtub in an extremely short time. For this reason, the hot water circulation device equipped with the oil burner has a feature that water can be supplied to the bathtub. Even if the oil burner is small, the amount of heat generated is about 17 times that of an electric heater.
The reason is that it doubles.

From this, using an oil burner,
If the hot water in the bathtub can be controlled to a constant temperature, the running cost can be significantly reduced, and an ideal device that can replenish water without the need for a hot water supply device can be realized. This invention was developed with the aim of realizing this further, and an important purpose of this invention is to control hot water temperature within a certain range regardless of the size of the bathtub. To provide a circulation device.

[0011]

In order to achieve the above-mentioned object, a hot water circulating device for a bath having a burner of the present invention has the following constitution. That is, the hot water circulation device has a hot water circulation path connected to the bathtub through the circulation pipe 4, and the circulation pump 1, the filtration member 2, and the burner 3 are provided in the hot water circulation path. The circulation pump 1 sucks the hot water in the bath and forcibly circulates it in the hot water circulation path, the operation of the burner 3 is controlled by the control means to heat the hot water to a predetermined temperature, and the filtering member 2 clarifies the hot water. Return to the bath.

Further, in the apparatus of the present invention, the control means 8 of the burner 3 is constituted by the temperature sensor 5 for detecting the hot water temperature, the calculation member 6, and the storage member 7 for storing the burner off temperature with respect to the temperature gradient. There is.

The calculation member 6 calculates the temperature measured by the temperature sensor 5 and the stored temperature of the storage member 7, and lowers the ignition temperature of the burner 3 when the temperature rise gradient of the hot water is steep, thereby increasing the temperature. When the temperature is gentle, the ignition temperature of the burner 3 is adjusted to be high to control the operation of the burner 3.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. However, the embodiment described below is an example 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 composed of materials, shapes, structures, and arrangements of components. Is not specified in the following structure. The device of the present invention can be modified in various ways within the scope of the claims for utility model registration.

Further, in this specification, the numbers corresponding to the members shown in the embodiment are referred to as "utility model registration request" and "to solve the problem" so that the utility model registration request can be easily understood. It is added to the members shown in the column of "means for performing". However, the members shown in the scope of claims for utility model registration are by no means limited to the members of the embodiment.

In the hot water circulation device for a bath having a burner shown in FIG. 1, a circulation pump 1, a filtering member 2 and a petroleum burner 3 are provided in a hot water circulation passage connected to a bath via a circulation pipe 4. ing.

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 bathtub, and the discharge side is connected to the filtration member 2. The circulation pump 1 is operated continuously for 24 hours.

The filter member 2 filters the hot water in the bath clarified. The filtering member 2 has a built-in material for clarifying hot water. B material is a natural stone crushed into granules, or
A natural stone pulverized and sintered to be porous 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 is accumulated in the filter member 2 and the circulating amount of hot water is reduced, the fining action is reduced.

Therefore, in the apparatus shown in FIG. 1, the primary filter 9 is connected to the suction side of the circulation pump 1. The primary filter 9 filters the hot water sucked into the circulation pump 1 to remove foreign substances such as hair and organic soft body. The primary filter 9 is a 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.

The oil burner 3 is connected between the discharge side of the filtering member 2 and the bath. A gun type burner can be used as the oil burner 3. The burner 3 is operated when the temperature of the hot water drops below a certain temperature, and is stopped when the temperature of the hot water rises above the burner off temperature. The operation of the oil burner 3 is controlled by the control means 8. Control means 8
Is a temperature sensor 5 for detecting the temperature of hot water, and a calculation member 6
And a storage member 7 for storing the burner off temperature with respect to the temperature gradient.

The temperature sensor 5 is arranged near the suction port. Since the temperature sensor 5 measures the temperature of hot water sucked into the burner 3, it can be arranged at any part of the burner 3 on the suction side.

The calculation member 6 compares the measured temperature of the temperature sensor 5 with the burner off temperature stored in the storage member 7, and stops the operation of the burner 3. Also, the calculation member 6
Starts the operation of the burner 3 when the temperature measured by the temperature sensor 5 becomes equal to or lower than the set temperature. The set temperature for starting the operation of the burner 3 is stored in the storage member 7 or the calculation member 6. The set temperature is set lower than the burner off temperature stored in the storage member 7.

FIG. 2 shows the set temperature and the burner off temperature. In this figure, the set temperature is 40.5 ° C.
Is set to Burner off temperature has a temperature gradient of 1
The temperature is adjusted within the range of 41 ° C to 43 ° C in the range of ° C / min or less.

The burner off temperature is stored in the storage member 7. That is, the storage member 7 stores the burner off temperature as a function of the temperature gradient. For example, 200
When a liter bath is heated with a petroleum burner 3 of 15000 Kcal, the hot water temperature rises by about 1 ° C per minute.
That is, the temperature gradient at this time is 1 ° C./minute. On the other hand, if a 400 liter bath is heated by the same burner 3, the temperature gradient will be halved to 0.5 ° C./min.

In the storage member 7 for storing the burner off temperature in the state of FIG. 2, the burner off temperature is 41 ° C. when the temperature gradient is 1 ° C./min, and the burner off temperature is 4 ° C. when the temperature gradient is 0.5 ° C./min.
It is set to 2 ° C. In this figure, the temperature gradient is in the range of 0 to 1 ° C./minute, and the burner-off temperature with respect to the temperature gradient is a linear function. However, this invention does not specify the burner off temperature stored in the storage member 7 as a linear function with respect to the temperature gradient.

Further, the arithmetic member 6 shown in FIG. 1 is provided with a temperature adjusting member for changing the set temperature. Computing member 6
Is a signal from the temperature adjusting member for shifting and changing the set temperature and the burner off temperature. In Figure 2, the set temperature is 4
It shows a state of 0.5 ° C. When the temperature adjusting member sets the set temperature to 41.5 ° C, the burner off temperature is shifted by + 1 ° C. Therefore, the temperature at which the calculation member 6 turns off the burner 3 is 42 when the temperature gradient is 1 ° C./min.
C. and 43 ° C. when the temperature gradient is 0.5 ° C./min. As described above, the device in which the set temperature and the burner off temperature can be adjusted by the temperature adjusting member has the feature that the bather can adjust the temperature to the optimum temperature for himself.

Further, the hot water circulating apparatus for bath shown in FIG. 1 is adapted to automatically supply hot water when the hot water level in the bathtub decreases. In the device shown in this figure, a water supply valve 10 is connected to the suction side of the circulation pump 1. The water supply valve 10 is connected to a water supply or the like. Further, the water supply valve 10 is an electromagnetic valve, and is opened and closed by a water level sensor 11 in the bathtub. The water level sensor 11 also controls the operation of the burner 3.

In this device, when the hot water level in the bathtub drops, this is detected by the water level sensor 11 and the water supply valve 1
0 is opened and the burner 3 is ignited. Circulation pump 1
The water supplied to the suction side of is heated by the burner 3 and is replenished in the bath. When the hot water level in the bathtub reaches the set value,
The water level sensor 11 closes the water supply valve 10 and stops the operation of the burner 3.

The hot water circulating device for a bath having the burner shown in FIG. 1 is operated in the following state to warm the hot water in the bath to a constant temperature. FIG. 1 shows a state in which the temperature of the bathtub changes.

When the hot water in the bathtub falls below the set temperature, this is detected by the temperature sensor 5, and the calculation member 6
Ignites burner 3. When the burner 3 is ignited, the hot water temperature rises rapidly. At this time, the temperature sensor 5 sends a temperature signal to the calculation member 6, and the calculation member 6 detects the temperature gradient when the warm water is heated. The storage member 7 inputs the burner off temperature with respect to the temperature gradient to the calculation member 6. The calculation member 6 calculates the temperature at which the burner 3 is stopped from the temperature gradient and the burner off temperature stored in the storage member 7, and when the hot water temperature reaches the burner off temperature,
Stop the operation of burner 3.

In FIG. 3, the solid line and the chain line show the temperature curve of hot water in the state where the temperature gradients are different.
The solid line shows a small bathtub in which the temperature rises sharply when the burner 3 is ignited. The chain line indicates a large tub, in which the hot water temperature is slowly increased by the burner 3. As shown by the solid line,
When the hot water temperature rises rapidly, in other words, when the temperature gradient is large, the calculation member 6 adjusts the burner off temperature to be low, and stops the operation of the burner 3 when the hot water temperature is low. The hot water temperature gradually rises even after the operation is stopped.

As shown by the chain line, when the temperature gradually rises, the burner off temperature can be set relatively high. In this case, the temperature rise after the burner is turned off is gentle and small. After the operation of the burner 3 is stopped, when the hot water temperature decreases, the states of to are repeated to control the hot water temperature within a certain range.

[0033]

The hot water circulation device for a bath having the burner of the present invention has a feature that the hot water temperature can be adjusted within a certain temperature range even though the hot water in the bathtub is heated by the oil burner. The reason is that the operating state of the oil burner is not controlled only by the hot water temperature, but the burner is ignited, and the burner shutdown temperature is changed by the gradient in which the hot water temperature rises. That is, the smaller the bathtub with respect to the oil burner, the steeper the temperature rise when the burner is ignited, and the higher the temperature rise after the burner is stopped.

The apparatus of the present invention is equipped with a storage member for storing the burner off temperature with respect to the temperature gradient in which the hot water temperature rises, and a calculation member. The arithmetic member adjusts the burner operation stop temperature to a lower value as the temperature of the burner rises sharply by igniting the burner. When used in a large bathtub, the temperature rise will be moderate, so the burner shutdown temperature should be adjusted higher. A large bathtub has a large amount of hot water, and the temperature rise after the burner is stopped is small. In this way, the hot water circulation device for a bath of the present invention can be used regardless of the size of the bathtub.
It has features that hot water can be controlled within a certain temperature range and that the burner can be operated in an ideal state.

Therefore, the hot water circulation device for a bath having the burner of the present invention can significantly reduce the running cost as compared with the device using the conventional heater, and simplifies the installation work like the conventional device. It realizes exactly the ideal features such as the ability to simplify hot water supply equipment.

[Brief description of drawings]

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

FIG. 2 is a graph showing a burner off temperature with respect to a temperature gradient.

FIG. 3 is a graph showing changes in hot water temperature.

FIG. 4 is a block diagram of a conventional hot water circulation device for a bath.

[Explanation of symbols]

1 ... Circulation pump 2 ... Filtration member 3 ... Petroleum burner 4 ... Circulation pipe 5 ... Temperature sensor 6 ... Calculation member 7 ... Memory member 8 ... Control means 9 ... Primary filter 10 ... Water supply valve 11 ... Water level sensor

Claims (1)

(57) [Scope of utility model registration request] 1. A hot water circulation passage connected to a bathtub through a circulation pipe (4), wherein the circulation pump (1) is provided in the hot water circulation passage.
And a filter member (2) and a burner (3) are provided,
The circulation pump (1) sucks the hot water in the bath and forcibly circulates it in the hot water circulation path, and the operation of the burner (3) is controlled by the control means (8) to heat the hot water to a predetermined temperature, and the filtration member In the hot water circulation device for bath (2), which clarifies the hot water and returns it to the bath, the burner control means (8) calculates the temperature of the hot water and the temperature sensor (5). Member (6) and a memory member that stores the burner off temperature with respect to the temperature gradient
(7) and the calculation member (6) is a temperature sensor (5)
The burner off temperature stored in the storage member (7) is calculated, and the operation stop temperature of the burner (3) is lowered when the temperature rise gradient of the hot water is steep, and when the temperature rise is gentle. A hot water circulation device for a bath having a burner, which is configured to control the operation of the burner by adjusting the shutdown temperature of the burner (3) to be high.