JPH01305249A - Bath furnace - Google Patents

Abstract

PURPOSE:To automatically supply hot water to an approximately bath set temperature in a short time by setting hot water heating temperature for supplying the hot water to a bath to the bath set temperature if circulating water temperature falls within a predetermined range, to a higher temperature than it if it is lower than the predetermined range, or to a lower temperature than it if it exceeds the predetermined range. CONSTITUTION:When an automatic hot water bath supply is operated, a controller 40 detects hot water from a hopper 23 and a circulation water temperature from a bathtub 20 by a temperature sensor 32, sets a hot water heating temperature for supplying to a bath to the bath set temperature as it is if the difference from the bath set temperature falls within a suitable predetermined range, and controls the heating of a heat exchanger 25 on the basis of the signal of a temperature sensor 31. If the circulation water temperature is largely lower than the bath set temperature, the hot water heating temperature is set to high, while if it is higher than that, it is set to low, and the bath temperature is regulated toward the set value while supplying the hot water to the bath. When the fact that the water level in the bathtub 20 drops is detected by a water level sensor 33, a valve V2 is opened to supply the hot water in the exchanger 25. Thus, hot water can be provided in the bath in a state near the bath set temperature in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a bath kettle device capable of reheating operation and automatic bath reheating operation.

<Prior art> Fig. 5 shows the configuration of a conventional example of this type of bath kettle device.■
is a bathtub, 2 is a heat exchanger, 3 is a circulation passage, 4 is a circulation pump, 5 is a fixed mini 1-single valve, 6 is a hopper, 7 is an automatic bath water supply path, 8 is a hot water supply path to the kitchen, etc., 9 is a The connection unit 10 is a burner.

During bath automatic hot water supply operation, burner lO is set to high temperature,
The water was mixed with hot water of, for example, 38° C. using a fixed mixing valve 5 and dropped into a hopper 6 to fill the bathtub l.

FIG. 7 shows the configuration of another conventional example. 11 is a three-way valve. Components that are the same as those shown in FIG. 6 are designated by the same reference numerals.

In the case of this device as well, during bath automatic hot water supply operation, the three-way valve 11 is switched to the hopper 6 side, and the fixed mixing valve 5 is used to drop a certain amount of hot water from the hopper 6 into the bathtub 1. I was doing tension.

<Problem to be solved by the invention> However, in the above conventional device, the bath temperature setting (38℃
When automatic pouring is performed at a temperature of ~50° C., the pressure of the fixed mixing valve 5 is large, which causes a problem in that the pouring flow rate decreases and it takes time to fill with hot water.

Of course, when dropping a large meteor, the dropping temperature is low (
There was a problem in that it took time to reheat the fire.

Furthermore, when hot water is automatically supplied to the bathtub during bathing, the temperature of the bathtub decreases, causing discomfort, and it is necessary to reheat the bath to the set temperature after the set water level is reached.

On the other hand, when bath hot water is supplied from the semi-hot water storage type heat exchanger 2 without the fixed mixing valve 5, in the conventional device, even if the burner 10 is controlled at the bath set temperature, hot water supply other than the bath cannot be performed. When used at the same time, there was a problem of large temperature changes.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional devices described above and to provide a bath kettle device that can reliably automatically supply hot water to a bath at a temperature close to the bath set temperature in a short period of time.

<Means for Solving the Problems> The first feature of the bathtub device of the present invention is that it includes a VA ring passage in which a circulation pump is disposed midway, which is branched from the circulation passage, passes through a heat exchanger, and then returns to the circulation passageway. A bypass passage that merges with the passage, a passage opening/closing valve for reheating provided in the bypass passage, a drop-in hopper for bath water supply connected to the incoming pipe side from the bathtub of the circulation passage, and a drop-in hopper to the drop-in hopper. It has a bath hot water supply path and a passage opening/closing valve for bath hot water supply provided in the middle thereof, and during bath automatic hot water supply operation,
When the bathtub water level rises to a circulating water level due to hot water supply, the circulation pump is driven to circulate the hot water from the dropping hopper along with the bathtub water to the circulation path and send it to the bathtub, and the temperature of the circulating water is detected; If the detected temperature is within a certain range including the bath set temperature, the hot water heating temperature for bath hot water supply is set to the bath setting temperature of 71 degrees, and if the detected temperature is below the certain range, the hot water heating temperature for bath hot water supply is set to 71 degrees. The hot water heating temperature is set higher than the bath set temperature, and when the detected temperature exceeds the certain range, the hot water heating temperature for bath hot water supply is set lower than the bath set temperature.

The second feature is that in the above configuration, the circulation pump is stopped while the bath water level is below the circulating water level, and hot water is supplied by setting the hot water heating temperature for bath hot water supply to the bath set temperature. .

The third feature is that in the above configuration, during the bath reheating operation, the passage opening/closing valve of the bypass passage is opened and the passage opening/closing valve of the bath hot water supply passage is closed, and the circulation pump circulates the bath water to the circulation passage. The structure is such that a portion is guided into a bypass passage and heated.

A fourth feature is that in the above configuration, a connection unit is provided at the connection part between the circulation passage and the bathtub to communicate the circulation outlet and circulation inlet of the bathtub, and in the unit, the inlet of the outgoing pipe and the return pipe of the circulation passage are provided. A discharge port is located, and a dropping hopper is connected to the vicinity of the inlet pipe suction port of the connection unit, and the discharge port of the return pipe is a double-tubular ejector consisting of the connection unit and faces into the bathtub. It is characterized by

What is the fifth feature of the bathtub device of the present invention? i! A circulation passageway with an i-ring pump disposed in the middle, a bypass passageway that is branched from the circulation passageway, passes through a heat exchanger, and joins the circulation passageway again, and a passageway opening/closing valve for reheating provided in the bypass passageway. , a dropping hopper for bath hot water supply connected via the circulation passage three-way valve, a bath hot water supply path to the dropping hopper, and an on-off valve for bath hot water supply provided in the middle thereof, and automatic bath hot water supply operation. Sometimes, the on-off valve for the bypass passage is closed, and the on-off valve for bath hot water supply is opened.
The three-way valve is switched to the drop hopper side, and the hot water from the drop hopper is circulated to the circulation passage by the uR1'J pump and sent to the bathtub, and the temperature of the circulating water is detected, and the detected temperature is the bath set temperature. If the detected temperature is within a certain range including the above, the hot water heating temperature for bath hot water supply is set to the bath set temperature, and if the detected temperature is below the certain range, the hot water heating temperature for bath hot water supply is set to the bath set temperature. If the temperature is set high and the detected temperature exceeds the certain range,
It is characterized in that the hot water heating temperature for bath hot water supply is set lower than the bath set temperature.

A sixth feature is that in the fifth configuration, during bath reheating operation, the bypass passage on-off valve is opened, the bath hot water supply on-off valve is closed, and the three-way valve is switched to the circulation passage side;
The bathtub water is characterized by being configured to circulate bath water through a circulation passage using a circulation pump, and to heat a portion of the bath water by guiding it to a bypass passage.

Similarly, the seventh feature is that in the fifth configuration, instead of providing a three-way valve, the dropping hopper is connected to the circulation passage via the dropping opening/closing valve, and the wi-ring communication passageway upstream of the connecting position of the dropping hopper is connected to the circulation passage. An on-off valve for bath water circulation is provided, and during automatic lees mill operation, the dropping on-off valve and the hot water supply on-off valve are opened, and the on-off valve for bath water circulation and the on-off valve for the bypass passage are closed. There is.

In addition to the seventh feature, the eighth feature is that during the bath reheating operation, the on-off valve for bath water circulation and the on-off valve for the bypass passage are opened, and the drop-in on-off valve and the on-off valve for hot water supply are closed. Circulate the bathtub water with the circulation pump
The feature is that a part of the U, 9 and σ doors are guided into a bypass passage and heated.

<Function> According to the configuration having the first feature of Section 11i, during automatic bath water supply operation, the temperature of the mixed water of hot water dropped from the hopper and circulating water from the bathtub is detected, and the detected temperature is If the difference between the temperature and the bath set temperature is within an appropriate certain range, the hot water heating temperature for bath hot water supply is set to the bath set temperature itself, so bath water can be supplied at the bath set temperature in a short time. In addition, when the detected temperature is significantly lower than the bath set temperature, hot water heated above the bath set temperature is supplied for bath hot water supply, so the bath temperature is adjusted toward the set value while bath hot water is being supplied. Reheating the bath water after filling it can be done in a short time. Furthermore, if the detected temperature is higher than the bath set temperature, hot water lower than the bath set temperature is poured in, so that the bath temperature can be adjusted at the same time as bath hot water supply. Furthermore, since the hot water heating by the heat exchanger is not set to a high temperature when supplying bath water, even if hot water other than bath water supply is used at the same time, it is safe because high temperature water will not be suddenly dispensed.

Further, according to the configuration having the second characteristic, when the water level in the bathtub is low enough to prevent circulation, the hot water heated to the bath set temperature is directly supplied to the bathtub, so hot water cannot be supplied at the bath set temperature. Things are going smoothly.

Further, according to the configuration having the third feature, when reheating, the high temperature water heated through the bypass passage is mixed with circulating water and buffered in temperature before being led to the bathtub, so that it does not overheat during reheating. There is no inconvenience caused by water flowing into the bathtub.

Furthermore, according to the configuration having the fourth feature, during automatic bath hot water supply operation and reheating operation, hot water flowing through the circulation passage is delimited by the ejector part of the connection unit, and is guided to the bathtub in a mild state. It will be destroyed. Similarly, the bathtub water circulates through the connection unit due to the ejector effect, and the temperature is equalized by the bathtub stirring action.

Further, according to the configuration having the fifth characteristic in paragraph iii, during automatic bath water supply operation, the temperature of the hot water dropped from the hopper and the bath set temperature are compared, and if the difference is within an appropriate certain range, the bath temperature is If the heating temperature of the hot water for hot water supply is set to the bath set temperature itself, and if the difference is large enough to exceed a certain range, the bath temperature will be set to such a temperature that the result of hot water supply approaches the bath set temperature. Since the hot water heating temperature for hot water supply is adjusted, it can be done in a short time and at the bath setting of 7.
! It is possible to fill hot water at a temperature close to A degree. Therefore, it only takes a short time to reheat the water after supplying hot water.

Furthermore, according to the configuration having the sixth characteristic, in addition to the effect of the configuration having the fifth characteristic, the high temperature water heated by the heat exchanger during reheating operation can be directly led to the bathtub. It mixes with circulating water to provide mild reheating.

Further, according to the configuration having the seventh feature, the same effect as the configuration having the fifth feature can be performed.

Further, according to the configuration having the eighth feature, the same effect as in the case of the configuration having the sixth feature can be performed.

<Embodiment> FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention, and FIG. 2 is a control flowchart thereof.

20 is a bathtub, and 21 is a connection unit provided at a connection between the bathtub and the circulation passage 22. Through this connection unit 21, the circulation outlet 20a and the circulation inlet 201 of the bathtub 20 are directly communicated with each other. 22a is a suction port of an outgoing pipe of the circulation passage 22, and 22b is a discharge port of a return pipe of the circulation passage 22. This discharge port 22b and the connecting unit 21 are configured into a double-tubular ejector, and are faced into the bathtub 20. Further, a dropping hopper 23, which will be described later, is connected to the vicinity of the suction port 22a of the outgoing pipe of the Aii circulation passage 22 of the connection unit 2.

A circulation pump P is provided in the circulation passage 22, and a bypass passage 24 is provided branching off from the circulation passage 22. This bypass passage 24 passes through a heat exchange coil 26 of a heat exchanger 25 and joins the circulation passage 22 again. The bypass passage 25 is provided with a passage opening/closing valve (2) for reheating.

A water inlet pipe 27 and a hot water outlet pipe 28 are connected to the heat exchanger 25, and the hot water outlet pipe 28 is branched to form a bath hot water supply path 29. Bath hot water supply path 29 is a passage opening/closing valve for bath hot water supply■2
Then, hot water is poured into the dropping hopper 23.

30 is a burner of the heat exchanger 25. 3I is heat exchanger 2
The first temperature sensor detects the hot water temperature within 32
is a second temperature sensor provided in the outgoing pipe of the circulation passage 22. Further, 33 is a water level sensor that detects the water level of the bathtub 20.

40 is a controller with a built-in microcomputer, which performs predetermined control operations by receiving commands from a remote control unit 41 and inputting information from the first and second temperature sensor 3L 32, water level sensor 33, etc. The command is output to the circulation pump P, the illumination opening/closing valve 2, the burner 30, etc. In addition to the main operation switch, the remote control unit 41 includes
An automatic bath water supply switch, reheating switch, automatic operation switch, etc. are provided, as well as a bath temperature setting device, a hot water supply temperature setting device, a bathtub water level setting device, etc.

Next, control by the controller 40 will be explained.

Now, if the bath automatic hot water supply switch is off (step (a)) and the reheating switch is on (step (b)), in this case, first, the passage on-off valve v1 of the bypass passage 24 and the passage of the bath hot water supply passage 29 are The VA ring pump P is driven with the on-off valve v2 in the idle state, the bath water is circulated through the circulation passage 22 without passing through the heat exchanger 25, the bath temperature is detected, and the bath temperature T is the bath set temperature. Reheating is started when the temperature is lower than T and S. That is, the passage opening/closing valve (2) of the bypass passage 24 is open, the passage opening/closing valve (v2) of the bath hot water supply path 29 is closed, the pump P is driven, and the hot water supply setting of the heat exchanger 25 is set to T. S
is switched to the highest level (step (c)). The bathtub water circulates through the circulation passage 22, a part of which flows into the bypass passage 24, is heated by the heat exchanger 25, and returns to the circulation passage 2.
2, where it is temperature-buffered and further passed through the circulation passage 2.
When discharging from the second discharge port 22b, an ejector effect is produced, and the hot water in the connection unit 21 is discharged into the bathtub 20 together. Therefore, mild reheating is possible. Moreover, the hot water in the bathtub 20 is also circulated through the connection unit 21, and the stirring effect in the bathtub 20 has the effect of making the temperature of the bathtub uniform.

When the bath temperature T reaches the bath set temperature 'T'ys (step (d)), the passage opening/closing valve v1 is closed,
Pump P is stopped, reheating is completed, and heat exchanger 25
hot water setting T. S returns to the original setting value (Step (Bot)
).

- If the bath automatic hot water supply switch is on, it is first determined whether the bath water level is above the set water level (step (to)), and if it is lower than that, the passage opening/closing valve of the bath water supply path 29 is determined. ■2 is open, passage opening/closing valve of bypass passage 24 ■1
is closed (step (1-)). Then, it is determined whether or not the water level of the bathtub is at the pump P circulation possible water level (step (H)), and if it is below the pump circulation possible water level, the pump P is stopped (step (S)). In this case, the hot water dropped from the hopper 23 flows into the bathtub 2° through the connection unit 21.

When the water level of the bathtub becomes equal to or higher than the pump circulating water level, the pump P is also driven (step (N)). As a result, hopper 2
3 is sucked in from the suction port 22a of the circulation passage 22 together with the hot water from the bathtub 2o, passes through the circulation passage 22, and is discharged from the discharge port 22b of the circulation passage 22 into the bathtub 20.
flows into.

The temperature at which hot water for bath hot water supply should be heated is determined as follows. In other words, RLF circulates when hot water is supplied to the bath! t22
The second temperature sensor 32 detects the temperature T of the hot water flowing through the bath, and the difference ΔT between this detected temperature T and the bath set temperature "rFS"
Calculate (step).

ΔT=Tr! , T, and when the difference Δ'F is within a certain range α, the set heating temperature T of hot water for bath water supply. , is the set bath temperature TFS, and when the detected temperature T is a low temperature below the certain range α, the set heating temperature T of hot water for bath water supply. , the bath setting temperature 'r1. higher, the detection l, 1 s 1 ■゛'r is higher than the above-mentioned certain range α/l! In case A, the set heating temperature of hot water for bath water supply is set to be lower than the bath set temperature of 1.8. The value of α is determined experimentally based on the size of the bathtub, the size of the bathtub 20, etc. Also, the bath temperature setting] ゛4. The temperature to be increased and the temperature to be decreased are also determined experimentally depending on the size of the bathtub, the size of the bathtub 20, etc. In the example, the lower limit of a certain range is (α), the lower limit is 2 as a part, 1+!A degrees e1"rs+-α when the bath set temperature is set higher than 1' F S, and rs+-α is when lowered. The temperature is Tys-α.Of course, α in each case is set to a level that does not cause discomfort due to the temperature difference.

In the case of the embodiment, the burner 30 also turns on and off the first crystal water for bath hot water supply.
Taking into account the 5 factors such as hysteresis in l, the hysteresis temperature is set to 1, and the burner-on temperature 'F08 is set to be lower than the burner-off temperature T+) by 'F1' than the burner-off temperature. 1. is made to match the set heating temperature T of hot water for bath water supply.

However, returning to Fig. 2, if the temperature difference Δ1゛ is constant 1
・Determine if it is in the n concave circle (step (o)), - If it is within a certain range, set the burner off temperature 'T'OFF, bath set temperature TFS, step (wa)), detected temperature i"
is higher than a certain range, the burner off temperature T
. Set FF to 'l'0FF to 'FS-α, step (force) to supply hot water in the direction of lowering the bathtub temperature, and if the detected temperature T is low below a certain range,
Burner off temperature 1゛. , is set as TUFF"TFS+α, and hot water is supplied to raise the temperature of the bathtub.

If the water level in the bathtub does not reach the pump circulating water level, the burner off temperature "rOFF" is brought to the bath set temperature T□ (step (wa)).

And the burner-on temperature 'rON ToN-T OFF T + TI: Hysteresis temperature and 4ru (step (ri)).

Like this '1゛. 8 and 'I'' OFF, +ti
f The hot water temperature 'F1.f' detected by the first temperature sensor 31 of the heat exchanger 25. However, when the burner-on temperature reaches 'rON' or higher (step), the burner 30
is turned on (step (S)), and the hot water temperature is also ’1
゛. When the burner is turned off (step (2)), the burner 30 is turned off.

Hot water is supplied to the bath in this step (a), and when the water level of the bathtub reaches the set water level, the hot water supply ends (step (e)).

In addition, when supplying bath water, the passage opening/closing valve V of the bypass passage 24
, can be opened to supply bath water while heating a portion of the hot water. This case is effective when the temperature of the drop from the ompper 23 is low.

FIG. 3 is an overall configuration diagram showing a second embodiment of the present invention, and FIG. 4 shows its control flow.

In FIG. 3, a portion +A that performs the same function as the first embodiment described above is indicated by the same symbol -J.

In this example, the connection unit 21 in the first embodiment is not provided, and the circulation passage 22 is directly connected to the bathtub 20. Further, in this embodiment, the dropping hopper 50 is connected to the circulation passage 22 via a three-way valve (2). A float switch 51 is provided in the +IIF drop-in hopper 50 to detect at least a first level and a second level higher than the first level. When the bath hot water supply operation starts, l! is placed in the hopper 50! ! Once the water has been poured to the second level, the circulation pump (2) starts operating via the flow controller 51.

Also, during bath water supply by driving the circulation pump P, the hopper 5
When the water level in 0 falls to the first level, the driving of the circulation pump P is stopped and dry operation of the pump is prevented.

Control by the controller 40 will be explained.

The bath automatic hot water supply switch is currently off (step off))
When the reheating switch is on (step), the three-way valve ■3 is first switched to the circulation side, the circulation pump P is driven, and the bath temperature 'rF measured by the temperature sensor 32 becomes the bath set temperature T'. When lower than F S, the inter-passage valve closes V,
is also opened, and the hot water setting 'r'as of the heat exchanger 25 is also switched to the highest setting (step (ha)). A portion of the circulating water from the bathtub 20 is heated through the bypass passage 24, joins again, and flows into the bathtub. The temperature buffering effect due to the merging is the same as in the first embodiment described above.When the bath set temperature is reached (
Step (in)), pump P is stopped, valve ■1 is closed, and hot water setting Tos is also returned to the original setting value (step (in)).
teeth)).

On the other hand, when the bath automatic hot water supply switch is on, it is first determined whether the bathtub water level detected by the water level detection sensor 33 is higher than the set water level (step (to)), and if it is lower than that, valve ■1 is turned on. Closed, valve 2 is opened, the passage is switched so that the three-way valve V3 is connected to the dropping hopper 50 side, and when the hot water reaches the second level in the hopper 50, the pump P is driven (step (and) ). As a result, the hot water in the heat exchanger 25 is transferred to the bath hot water supply path 29, the hopper 50,
It flows into the bathtub 20 through the three-way valve V3 and the circulation passage 22. And the temperature r of the hot water dropped from the hopper 50
fc? A constant temperature of 1゛4 detected by the n degree sensor 32 and exposed to the wind. Δ゛F is calculated (step (c)).

Then, it is determined whether the difference ΔT is within a certain range α or not. As in the case of the first embodiment described above, each of the subsequent steps (nu), (ru), (and ),(circle)
, (ka), (yo), (ta), kure). In this embodiment, the temperature of the hot water detected by the temperature sensor 32 is the temperature of the hot water itself dropped from the hopper 50, and in the first embodiment, the temperature of the mixed water of the dropped hot water and the water from the bathtub is This is different from what was detected by sensor 32.

FIG. 5 is a block diagram showing a main part of still another embodiment of the present invention, which is a modification of the second embodiment. In this example, two valves v are used instead of the three-way valve ■3 in the second embodiment.
4, ■ 5. A similar path switching is performed.

The rest is the same as the second embodiment. Of course, according to this embodiment, hot water can be dropped from the hopper 50 and bath water can also be circulated.

<Effects> The present invention has the above configuration, and according to the configuration of claim 1, a large capacity of hot water close to the bath set temperature can be supplied to the bath without providing a mixing pulp as in the conventional case.
You can fill the bath with hot water in a short time and at a temperature close to the set temperature. Therefore, the subsequent reheating naturally takes only a short time.

Furthermore, if there is a large difference between the bath set temperature and the bath water supply temperature, the hot water heating temperature for bath water supply is corrected and adjusted accordingly, making it possible to correct the bathtub temperature while supplying bath water. Also, even when hot water is being supplied to the bath, the heating setting of the heat exchanger is not switched to the maximum temperature, so
Even when hot water is supplied from the heat exchanger to a place other than the bath at the same time, the inconvenience of sudden hot water being dispensed is eliminated.

According to the second aspect of the present invention, hot water is supplied at the bath set temperature during the initial stage of bath water supply when the water level is low, so hot water can be supplied at a preferred temperature from the beginning.

Furthermore, according to the structure of claim 3, when reheating a bath, the high-temperature water heated through the bypass passage is mixed with the V8 ring water and buffered in temperature before being led to the bathtub, so that the superheated water suddenly There will be no inconvenience such as water flowing into the bathtub.

Further, according to the configuration of claim 4, the hot water flowing through the circulation passage is mixed with the hot water in the connection unit at the ejector portion of the connection unit and guided to the bathtub, so that a mild introduction of hot water is achieved. Moreover, the ejector effect allows the bathtub water to be circulated directly through the connection unit, so that the temperature inside the bathtub can be equalized.

Moreover, according to the structure of claim 5, substantially the same effect as the effect of the structure of claim 1 is produced, and the bath can be filled with hot water close to the bath set temperature in a short time, and subsequent reheating can also be done in a short time. Furthermore, since the setting of the heat exchanger is not switched to MAX even when hot water is being supplied to the bath, there is no inconvenience that high-temperature water is suddenly supplied even during simultaneous use.

Moreover, according to the structure of claim 6, the same effect as that of claim 3 can be achieved.

Moreover, according to the configuration of claim 7, the same effects as those of claims 1 and 5 can be achieved.

Furthermore, according to the structure of claim 8, the same point as in claims 3 and 6 is obtained.
It has a great effect.

In addition, it is also possible to heat the water in the hot water instead of supplying hot water to the bath.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of the first embodiment of the present invention, Fig. 2 is a control 11 flowchart thereof, Fig. 3 is an overall configuration diagram of the second embodiment of the invention, and Fig. 4 is the control. FIG. 5 is a block diagram showing a main part of another embodiment of the present invention, and FIGS. 6 and 7 are block diagrams of conventional equipment, respectively. 20: Bathtub 21: Connected to 1 Unit 22: Circulation passage 1 path 23: Drop 1ΔMipo, Bath 2.1: Bypass passage 1 passage 25: To 7, exchanger 29: Bath hot water supply path 3I, 32: Temperature sensor 33: Water (☆Sensor 40 ” -I N') II -・':;41
:Remote control unit 5():Drop hopper 51:F-D-l-switch 1):Circulation pump V,, V,,■3,v4,■,:Valve output 1! jJi Noritz Co., Ltd.

Claims (8)

[Claims] (1) A circulation passage with a circulation pump placed in the middle, a bypass passage that branches off from the circulation passage, passes through a heat exchanger and joins the circulation passage again, and a reheating passage provided in the bypass passage. A passage opening/closing valve, a dropping hopper for bath hot water supply connected to the incoming pipe side from the bathtub of the circulation passage, a bath hot water supply path to the dropping hopper, and a passage opening/closing valve for bath hot water supply provided in the middle thereof. and when the bathtub water level rises to a water level that can be circulated by hot water supply during bath automatic hot water supply operation, the circulation pump is driven to circulate the hot water from the drop hopper together with the bathtub water through the circulation passage and send it to the bathtub. The temperature of the circulating water is detected, and if the detected temperature is within a certain range including the bath set temperature, the hot water heating temperature for bath hot water supply is set to the bath set temperature, and the detected temperature falls below the certain range. In this case, the hot water heating temperature for bath hot water supply is set higher than the bath set temperature, and when the detected temperature exceeds the predetermined range, the hot water heating temperature for bath hot water supply is set lower than the bath set temperature. A bath kettle device characterized by: (2) The bathtub device according to claim 1, wherein the circulation pump is stopped while the bathtub water level is below the circulating water level, and hot water is supplied by setting the hot water heating temperature for bath hot water supply to the bath set temperature. (3) During the bath reheating operation, the passage opening/closing valve of the bypass passage is opened and the passage opening/closing valve of the bath hot water supply passage is closed;
Claim 1: The bathtub water is circulated through the circulation passage by a circulation pump, and a part of the water is guided into the bypass passage and heated.
Or the bathtub device according to 2. (4) providing a connection unit that communicates the circulation outlet and circulation inlet of the bathtub at the connection between the circulation passageway and the bathtub, and locating the inlet of the outgoing pipe and the outlet of the return pipe of the circulation passageway within the unit; A dropping hopper is connected to the vicinity of the outgoing pipe suction port of the connecting unit, and the discharge port of the return pipe is a double-tube-shaped ejector comprising the connecting unit and facing into the bathtub. 3. The bathtub device according to 3. (5) A circulation passage with a circulation pump placed in the middle, a bypass passage that is branched from the circulation passage, passes through a heat exchanger and joins the circulation passage again, and a reheating passage provided in the bypass passage. It has a passage opening/closing valve, a dropping hopper for bath hot water supply connected to the circulation passage via a three-way valve, a bath hot water supply path to the dropping hopper, and an opening/closing valve for bath hot water supply provided in the middle thereof, During automatic bath water supply operation, the on-off valve of the bypass passage is closed, the on-off valve for bath hot water supply is opened, the three-way valve is switched to the drop hopper side, and the hot water from the drop hopper is circulated to the circulation passage by a circulation pump. and sends the circulating water to the bathtub, and detects the temperature of the circulating water, and if the detected temperature is within a certain range including the bath set temperature, the hot water heating temperature for bath hot water supply is set to the bath set temperature, and the detected temperature is set to the bath set temperature. If the detected temperature is below the certain range, the hot water heating temperature for bath hot water supply is set higher than the bath set temperature, and if the detected temperature is above the certain range, the hot water heating temperature for bath hot water supply is set higher than the bath set temperature. A bath kettle device characterized in that it is configured to be set low. (6) During bath reheating operation, open the bypass passage on-off valve, close the bath water supply on-off valve, switch the three-way valve to the circulation passage side, and circulate the bath water to the circulation passage with the circulation pump. 6. The bathtub device according to claim 5, wherein a part of the bathtub is heated by guiding it to a bypass passage. (7) Instead of providing a three-way valve, the drop-in hopper is connected to the circulation passage via the drop-in opening/closing valve, and
An on-off valve for bath water circulation is provided in the circulation passage upstream of the connection position of the drop hopper, and during automatic hot water supply operation, the drop on-off valve and the hot water supply on-off valve are opened, and the on-off valve for bath water circulation and the bypass passage are opened. 6. The bathtub device according to claim 5, wherein the on-off valve is configured to be closed. (8) When reheating the bath, open the on-off valve for bath water circulation and the on-off valve for the bypass passage, close the drop-in on-off valve and the on-off valve for hot water supply, and circulate the bath water to the circulation passage with the circulation pump. , a part of which is guided into a bypass passage to be heated.