JP2000193311A - Bath heater and bathroom heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a bathroom heater to an existing bath heater while reducing the piping cost by sharing the piping between bath heating and bathroom heating and to take an effective countermeasure against dead water on the bathroom heater side. SOLUTION: A hot water supply apparatus 1 for bath having hot water filling and extra firing function is coupled with a bathtub 3 through hot water supply pipe 6 and return pipe 7 for extra firing and the supply pipe 8 and return pipe 9 of a hot water type bathroom heater 4 are coupled with the hot water supply pipe 6 and return pipe 7. When a hot water filling or poring mode of the bathtub 3 is set by a control circuit 12, hot water is supplied from the hot water supply apparatus 1 for bath through the hot water supply pipe 6. When an extra firing mode is set, extra firing is performed using the hot water supply pipe 6 and return pipe 7 coupling the hot water supply apparatus 1 and the bathtub 3. When a bathroom heating mode is set, hot water is returned from the hot water supply pipe 6 through the supply pipe 8 for heating and the hot water return pipe 7 back to the hot water supply apparatus 1 for bath. When the hot water filling or extra firing mode conflicts with the bathroom heating mode, the hot water filling or poring mode or the extra firing mode is performed preferentially.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath in which one bath water heater is used to supply hot water and add hot water to a bath tub, to perform reheating, and to additionally provide a bath in which the bath tub is installed. The present invention relates to a device for heating the inside of a bathroom and taking measures against water in the bathroom heating circuit.

[0002]

2. Description of the Related Art As shown in FIG. 4, a hot water supply pipe 25 and a return pipe 26 are provided between a bath water heater 20 and a bathtub 22 as dedicated pipes in a conventional bath water heater. The pipes 25 and 26 are also used for filling hot water in the bathtub 22, keeping heat, filling hot water, and the like. Normally, the temperature of the hot water flowing in the bath piping is about 42 ° C. when hot water and hot water is supplied, and about 50 ° C. to 60 ° C. when reheating is standard. The piping circuit has a circulation port 2 on the bathtub 22 side.
3 is open to the atmosphere. In the figure, 21 is a bathroom, 2
4 is a heat exchanger, 27 is a circulation pump.

On the other hand, as shown in FIG. 5, a heating pipe of a hot water type bathroom heater is connected between a hot water supply heater 30 and a bathroom heater 33 by an outgoing pipe 35 and a return pipe 36, and the hot water flowing through the heating pipe. Is about 80 ° C., and a closed circuit (or closed circuit) system is used as a standard for the piping circuit. In the case of a heating pipe, it is necessary to maintain a closed circuit system and prevent hot water from leaking to the bathtub 32 side. In the figure, 31 is a bathroom, 34 is a heat exchanger, and 37 is a circulation pump.

[0004] As described above, in the conventional bath heating and bathroom heating, it is standard to provide independent dedicated pipes due to differences in the operating temperature and the piping circuit system. There is currently no system for operating the heater.

[0005] In addition, if the water in the pipes of the bath water heater 20 or the like contains dirt or the like, there is a possibility that germs and the like will propagate and the scale will accumulate if left for a long time. In particular, since there is a possibility that germs and the like may propagate in the sealed place and the staying place, the bath water heater 20 is basically configured such that there is no stagnation place in the equipment. In addition, every time the bath is automatically operated, water in the equipment and piping is purged of water,
Always keep the inside of the piping clean. On the other hand, such a purge is not required in the bathroom heating circuit because it is a closed circuit.

[0006]

As described above, in the conventional bath hot water supply and heating, since the bath piping and the heating piping are each dedicated piping, it is necessary to install two systems of piping in the bathroom. In addition, the installation cost of piping is high. Also, in existing houses, there are cases where it is not possible to lay pipes by penetrating the wall anew.Therefore, when only bathroom pipes are installed in the bathroom, the bathroom using a substantially hot water type bathroom heater is used. There is a disadvantage that heating cannot be performed.

Further, there is a problem that the pipes for the bath and the heating cannot be shared for the following reasons. (1) There is no unitized system in which one system pipe is branched in two directions to take out required hot water. (2) A control method on the side of the bath water heater and the hot water supply heater at the time of supplying hot water temperatures having different use temperatures from the bath piping has not been established. For example, a control method in a case where a hot water filling operation of a bath (such as automatic hot water filling) and a hot water type bathroom heater are simultaneously operated. (3) When a bath pipe and a heating pipe are shared, dust in the bath pipe may enter the heating device and block the heat exchanger and the on-off valve.

[0008] (4) The heater is used less frequently than the bath, and the water is blocked and stays in the bathroom heater 33 and the heating pipe for a long time, and may become dead water (dead water). In that case, various germs and the like proliferate, which is not preferable for hygiene). (5) There is no established method for purging water in the heating machine and the heating pipe to keep the inside of the equipment clean.

[0009] A first object of the present invention is to provide a bath heating and bathroom heating device that shares a pipe for heating and a bath in bath heating and bathroom heating, and a second object is to provide a bath heating and bathroom heating device. It is an object of the present invention to effectively solve the water problem caused by the death of a heater having a closed circuit configuration, which is a problem when a heating pipe is shared.

[0010]

In order to achieve the above object, according to the present invention, in a bath heating and bathroom heating apparatus, hot water is supplied between a bath water heater having a hot water filling and reheating function and a bathtub. In a bath heating device connected by a hot water feed pipe and a return pipe that is also used for reheating, a hot water type bathroom heater is installed in a bathroom, and the bathroom heater and the hot water flow pipe are heated in a bathroom or a part close to the bathroom. When the hot water supply mode to the bathtub is set by connecting the outgoing pipe and the heating return pipe, hot water is supplied from the bath water heater into the bathtub via the hot water outgoing pipe, and the reheating mode is set. When reheating is performed using the hot water supply pipe and the hot water return pipe connecting the bath water heater and the bathtub, when the bathroom heating mode is set,
Opening between the bath water heater and the bathroom heater to heat the bathroom,
When the hot water filling or reheating mode conflicts with the bathroom heating mode, a control circuit that always gives priority to the hot water filling or reheating mode side is provided.

Further, in the invention according to claim 2,
In the control circuit according to the first aspect of the present invention, a priority circuit for switching to a bathroom heating mode at the same time as the stop of the operation is added when the operation is performed with priority given to the filling of the bathtub or the reheating mode.

Further, in the invention according to claim 3,
In the control circuit according to the first aspect, when the hot water mode and the bathroom heating mode compete with each other, a simultaneous operation circuit that simultaneously performs hot water and bathroom heating is added.

Further, in the invention according to claim 4,
In the control circuit according to the first aspect, a simultaneous operation circuit for simultaneously performing the reheating and the bathroom heating is added when the reheating mode and the bathroom heating mode conflict with each other.

Further, in the invention according to claim 5,
In the control circuit according to claim 1, when a warming mode of hot water in the bath tub is operated and the bathroom is heated at that time,
Once the bathroom heating operation is stopped, the hot water in the bath tub is circulated in the reheating circuit and the temperature of the hot water at this time is detected, and if this temperature is lower than the set temperature, it rises to the set warming temperature It is characterized by adding a heat retention operation circuit for performing reheating operation.

Further, in the invention according to claim 6,
In the control circuit according to claim 1, the forward side to the bathroom heater is opened at regular time intervals, the return side is opened to the bathtub side, and the pump in the bath water heater is operated to drive the bathroom heater from the bath water heater. A water purging circuit is provided in which water is passed through a circuit leading to a bathtub via the bath, and a water purging circuit for purging water into the bathtub in the bathroom heating circuit is added.

Further, in the invention according to claim 7,
The control circuit according to claim 1, wherein a hot water mode or a reheating mode for supplying hot water which is insufficient in the bathtub is set, and when starting the operation, an opening side of a bathroom heating circuit is opened in advance and a return side. To the bathtub side, and before entering hot water or reheating, pass the hot water or reheating water from the bathroom heater into the bathtub to purge the water in the bathroom heating circuit into the bathtub. It is characterized by being added.

[0017]

When the bath heating mode is set, hot water of about 42 ° C. is supplied from the bath water heater to the bath tub via the hot water supply pipe, and the bath is filled. Then, when the bathtub reaches a certain amount of water, the hot water supply stops. At this time, if the water temperature is equal to or lower than the set water temperature, the reheating mode automatically operates. When the temperature of hot water in the bathtub is low and the reheating mode is set, reheating is performed until the temperature of the hot water rises to the set temperature. or,
When hot water in bathtub became short, hot water (additional hot water)
Mode works. These operations are examples of operation of a known fully automatic bath water heater.

Next, when the bathroom heating mode is set when the bathtub is not automatically operated, high-temperature water of about 80 ° C. is circulated from the bath water heater into the bathroom heater to heat the bathroom. . This heating is also a known operation example.

Next, in the above operation example, if the bathroom heating mode is set during the filling or reheating, the bathroom heating operation is in the standby mode until the filling or reheating is completed, and the filling or reheating is performed. When the heating is completed, the bathroom heating operation starts automatically. On the other hand, if the hot water or reheating mode is set during the bathroom heating operation, the bathroom heating operation is temporarily interrupted, the hot water or reheating operation is started, and automatic operation is performed when the hot water or reheating is completed. The bathroom heating operation is restarted.

All of the above are examples of operation in which the bathing or reheating of the bathtub is given priority to the heating of the bathroom. However, when the simultaneous operation mode is set, the bathtub is being filled or reheated. Even bathroom heating is done at the same time. At this time, since the amount of heat that can be extracted from the hot water sent from the bath water heater is constant, there is a possibility that a problem of insufficient amount of heat (flow rate) may occur. Therefore, depending on the set temperature of the boiling, for example, the bathroom heater side is set to the weak operation in the initial operation, and automatically switched to the strong operation when the reheating mode is entered. According to this simultaneous operation control mode, the bathroom is also warm when the bath is heated, so that bathing can be performed immediately.

Next, the dead water is purged periodically or in advance in the hot water or reheating mode, by operating the bath water heater (pump only), and the bath water heater → hot water supply pipe →
Branch section → heating pipe → bathroom heater → heating return pipe → hot water pipe → bathtub and purge. Alternatively, when the bathroom heating mode is set, purging is performed in the above line before starting this operation.

Next, a hot water warming mode is set, and if a bathroom heating operation is being performed at this time, the operation is temporarily interrupted.
In the same manner as reheating, the hot water in the bathtub is circulated in the bath water heater and the water temperature is detected.If the water temperature is lower than the set room temperature, reheating is performed until the set room temperature is reached. Restart the heating operation.

Next, when the bath mode is set and the bathroom heating is in operation at that time, the bathroom heating operation is temporarily interrupted to perform hot water supply, and then the operation is resumed while the bathroom heating is being performed. Pour hot water into the bathtub to make hot water. At this time, the bathroom heater is switched to strong or weak operation according to the set temperature.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION A bath water heater used in the present invention comprises a heat exchanger for hot water for producing hot water of about 80 ° C.,
It has bath heat exchangers that produce hot water at about 42 ° C to 80 ° C, each of which operates independently. Further, the bath water heater and the bathtub are connected by a hot water supply pipe and a return pipe for reheating. On the other hand, the bathroom heater is attached to the upper part of the ceiling or the side wall of the bathroom, and the inlet side of the heat exchanger in the bathroom heater is branched at a position close to the entrance pipe and the bathroom in the reheating circuit, The exit side is connected to the return pipe in or near the bathroom. Therefore, the number of pipes extended from the bath water heater installed outdoors is one each for going and returning, and the bathroom is divided into a bathtub side and a bathroom heater side.

Further, a switching valve for controlling the flow is attached to each of the branching portion and the connecting portion, and the switching valve is controlled by a control circuit according to each mode. The control circuit is installed in the bath water heater. This control circuit can be remotely operated by a remote controller attached to a bathroom or a kitchen.

[0026]

1 shows an embodiment of a bath heating and bathroom heating apparatus according to the present invention, FIG. 2 shows an example of a bath water heater, and FIGS. 3 (a) and 3 (b) show switching valves (switching) in each control. An example of opening and closing the unit is shown. In FIG. 1, 1 is a bath water heater,
2 is a bathroom, 3 is a bathtub, 4 is a bathroom heater, 5 is a circulation port provided in the bathtub 3, 6 is a hot water pipe as a reheating circuit connecting the bath water heater 1 and the circulation port 5, 7 is Return pipe. Reference numeral 8 denotes a heating return pipe branched from the hot water supply pipe 6 to reach the entrance of the bathroom heater 4, and 9 denotes a heating return pipe connected to the return pipe 7 from the exit of the bathroom heater 4. In the example, both the branch and the knot are inside the bathroom 2, but they may be outside. The heating outgoing pipe 8 and the return pipe 9 are connected to the bathroom 2.
Is connected to the bathroom heater 4 through the outside, but may be piped so as to pass through the interior of the bathroom 2. In addition, in the flow path of the heating hot water, a tank or the like for expanding and replenishing the heating water is provided as necessary.

As shown in FIG. 2, the bath water heater 1 has a heat exchanger 1a for hot water supply and a heat exchanger 1b for bath incorporated therein. In FIG. 2, 1c is a water supply port, 1d is a hot water supply pipe connection port, 1e is a gas supply port, 1f is a hot water outgoing pipe connection port, 1g is a hot water return pipe connection port, and 1h is a drain port.

In the bath water heater 1 shown in FIG. 2, when the bathroom heater 4 is operated independently, the heat exchanger 1b is driven to flow high-temperature water of about 80 ° C. and to heat through the pipe 6. The water is sent from the outgoing pipe 8 to the bathroom heater 4 and returned to the heating return pipe 9.
Heat exchanger 1b in bath water heater 1 via return pipe 7
Return to

In FIG. 1, reference numeral 10 denotes a remote control for bathtub heating and heating operation, 11 denotes a signal line, 12 denotes a control circuit, and FIG.
(A) In (b), a is a switching valve attached to a heating outgoing pipe 8 branched from the outgoing pipe 6, b is a switching valve attached to the outgoing pipe 6 downstream of the branching section,
a 'is the inlet side of the three-way valve, b' is the return inlet side of the return pipe, and c 'is the return outlet.

Next, each operation mode will be described. When the bath heating mode is set on the remote controller 10, the switching valves a and a 'are closed, and the b, b' and c 'are opened.
The heat exchanger 1 a of the bath water heater 1 is driven to supply hot water of about 42 ° C. into the bathtub 3. Then, when the inside of the bathtub 3 reaches a certain amount of water, hot water supply is stopped. At this time, if the water temperature is equal to or lower than the set water temperature, the reheating mode automatically operates.

When the water temperature in the bathtub 3 is lowered and the reheating mode is set, the switching valves a and a 'are closed, the b, b' and c 'are opened, and the heat exchanger 1b is opened. Is driven to circulate warm water heated to about 50 ° C. to 60 ° C. in the bathtub 3.

Next, if the bathroom heating mode is set when the bathtub 3 is not automatically operated, the switching valves b and b 'are closed.
a, a 'and c' are opened, and about 80 ° C. from the heat exchanger 1b.
The high temperature water enters the bathroom heater 4 via the outgoing pipe 6 → 8 and the return pipe 9 → 7, and returns to the return pipe 9 → 7 → heat exchanger 1b to heat the bathroom.

In the case of conflict If the bathroom heating mode is set during hot water filling or reheating, the control circuit 12 is operated and the bathroom heating operation is in the standby mode until the hot water, hot water or reheating is completed. When the hot water, hot water or reheating is completed, the bathroom heating operation is automatically started. On the other hand, bathing during bathroom heating operation,
When the hot water or reheating mode is set, the bathroom heating operation is temporarily interrupted, and the hot water, hot water or reheating operation is started, and automatically when the hot water, hot water or reheating is completed. Then, the bathroom heating operation is restarted. The opening / closing of the switching valve at the time of this conflict is the same as that at the time of hot water filling, hot water supply, reheating, and bathroom heating.

Simultaneous operation The above is an operation example in which the bathing, bathing or reheating of the bathtub 3 is given priority over the heating of the bathroom. However, when the simultaneous operation mode is set, the hot water is not supplied to the bathtub 3. Bathroom heating is performed at the same time even during stretching, hot water or reheating. At this time, since the pipe between the bath water heater 1 and the bathroom 2 is one for each round trip, there is a problem of insufficient heat quantity (flow rate). For example, since hot water of about 42 ° C. is supplied during hot water filling, hot water of 42 ° C. also circulates on the bathroom heating side at this time,
On the bathtub 3 side, the boiling may be delayed. Therefore,
By setting the bathroom heater 4 to a weak operation only at the beginning of the operation and a strong operation immediately before the boiling, the inside of the bathroom 2 becomes warm when the bath is heated, so that immediate bathing is possible. During the simultaneous operation, the switching valves for hot water and hot water are opened a, b, a ', b' open and c 'closed, and for reheating, a, b, a', b ', c'. Everything is open.

・ Purge of dead water Purging of dead water is performed periodically by a bath water heater (pump only).
1 is operated, and as shown in FIG.
c 'is closed and a, a' and b 'are opened, and the hot water
→ Branch → Heating pipe 8 → Bathroom heater 4 → Heating return pipe 9
→ Purging with hot water return pipe 7 → bathtub 3 Alternatively, when the bathroom heating mode is set, purging is performed in the above line before starting this operation. Alternatively, when the hot water filling or reheating mode is set, the purging is performed in advance.

Heating operation When the warming mode of hot water is set and the bathroom heating operation is being performed at this time, the heating operation is temporarily interrupted, and the hot water in the bathtub 3 is supplied to the bath water heater 1 in the same manner as the reheating. Then, if the water temperature is lower than the set temperature, reheating is performed until the set temperature is reached, and when this is completed, the heating operation is automatically restarted.

When the hot water mode is set, hot water is supplied into the bathtub 3 in the same manner as the hot water filling. If the bathroom heating was operating at that time, the bathroom heating was temporarily interrupted, hot water was supplied, and then restarted, or the switching valves b and c 'were closed, and a,
The return hot water is poured into the bathtub 3 while heating the bathroom while controlling a 'and b' to be open, and used as hot water. At this time, the bathroom heating is switched to strong or weak operation according to the set temperature.

[0038]

As described above, according to the present invention, the pipes for the bath and the bathroom are commonly used up to or near the bathroom.
The following effects are obtained. 1. The installation cost of piping can be reduced by half. 2. In existing houses, bathroom heating can be retrofitted to bath piping. 3. When the bath and the heating operation conflict, the bath side is given priority, so there is no obstacle to bathing. 4. Even if pipes are shared, water measures are taken to prevent death,
No worries about water-related troubles.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an example of a bath water heater used in the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a control example (operation example).

FIG. 4 is an explanatory view of a conventional bath heating device.

FIG. 5 is an explanatory view of a conventional bathroom heating device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bath water heater 2 bathroom 3 bath tub 4 bathroom heater 5 circulation port 6 hot water return pipe 7 hot water return pipe 8 heating return pipe 9 heating return pipe 10 remote control 11 signal line 12 control circuit

Claims (7)

[Claims] 1. A bath heating device comprising a bath water heater having a hot water filling and reheating function and a hot water supply pipe for both hot water supply and reheating and a return pipe connected to a bathtub, wherein a hot water type bathroom heater is installed in the bathroom. Then, the bathroom heater and the hot water pipe are connected by a heating pipe and a heating return pipe in or near a bathroom, and when the hot water filling mode to the bathtub is set, the hot water pipe from the bath water heater is set. When hot water is supplied into the bathtub via the reheating mode, the reheating is performed using the hot water return pipe and the hot water return pipe connecting the bath water heater and the bathtub, and the bathroom heating mode is set. In the case where the bath water heater and the bathroom heater are opened to perform bathroom heating, and when the hot water or reheating mode and the bathroom heating mode conflict, a control circuit that always gives priority to the hot water or reheating mode side is provided. Bath room Heat and bathroom heating system. 2. The control circuit according to claim 1, further comprising a priority circuit for switching to a bathroom heating mode at the same time as the operation is stopped, when the operation is prioritized for filling the bathtub or reheating the bath. And bathroom heating system. 3. The bath heating and bathroom heating apparatus according to claim 1, further comprising a simultaneous operation circuit for simultaneously performing the filling and the bathroom heating when the hot water mode and the bathroom heating mode conflict with each other. 4. The bath heating and bathroom heating apparatus according to claim 1, further comprising a simultaneous operation circuit for simultaneously performing reheating and bathroom heating when the reheating mode and the bathroom heating mode conflict with each other. 5. The control circuit according to claim 1, wherein the mode for keeping warm of hot water in the bathtub is activated, and when the bathroom is being heated at that time, the bathroom heating operation is temporarily stopped and the heating is performed in the reheating circuit. A bath that circulates the hot water in the bathtub and detects the temperature of the hot water at this time, and if this temperature is lower than the set temperature, adds a heat retention operation circuit that performs reheating operation until the temperature rises to the set temperature. Heating and bathroom heating equipment. 6. The bath water heater according to claim 1, wherein a forward side to the bathroom heater is opened at regular time intervals, a return side is opened to the bathtub side, and a pump in the bath water heater is operated. A bath heating / bathroom heating device comprising a water purging circuit for purging water into a bathtub through a bath heater through which water is passed through a circuit from a bathroom heater to a bathtub. 7. The control circuit according to claim 1, wherein a hot-water mode or a reheating mode for supplying insufficient hot water in the bathtub is set, and when starting the operation, the forward side of the bathroom heating circuit is set in advance. Opening, opening the return side to the bathtub side, and before entering hot water or reheating, pass hot water or reheating water from the bathroom heater into the bathtub to purge dead water in the bathroom heating circuit into the bathtub. Bath and bathroom heaters with a dead water purge circuit.