JPH03260549A - Bath equipment with reheating device - Google Patents

Abstract

PURPOSE:To prolong the lifetime of a circulation pump and to relax the limitation on the set heights of a bathtub and the main body of an appliance by supplying hot water to a forward pipe of a reheating circulation pipeline by an automatic hot water supplying operation for a prescribed time and by extracting air from inside of the reheating circulation pipeline by this operation. CONSTITUTION:Since hot water in a bathtub does not circulate when there is air in a forward pipe 2 of a reheating circulation pipeline 1, a water flow switch S provided in the front half part 3a of a backward pipe 3 detects the stop of the circulation and turns non-operative. When the non-operative state of the water flow switch S continues for a prescribed time (e.g. about five minutes), a solenoid valve V1 for changing over pipelines is switched to be opened by an air extracting instruction from an electronic control device G, so as to make the front half part 3a of the backward pipe 3 communicate with a bypass communication pipe 5. Since a two-line hot water supply pipeline is formed by making a hot water supply pipe 6 communicate with a part on the circulation pump P side of the forward pipe 2, hot water is supplied from the two pipelines, the forward pipe 2 and the backward pipe 3 of the reheating circulation pipeline 1 and thereby the air existing in the reheating circulation pipeline 1 is extracted quickly. Solenoid valves V1 and V2 are switched by a reheating instruction from the electronic control device G and thereby a closed reheating pipeline is formed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a reheating device that circulates and heats hot water in a bathtub, and supplies fresh hot water from a water heater to the bathtub through the reheating device. Regarding the bath device, especially when there is air in the reheating circulation pipe during reheating operation, the air can be automatically removed.

[Conventional technology]

In a bath device equipped with a reheating device, if there is air in the suction side piping of the circulation pump in the reheating circulation pipe during reheating operation, the height is limited to a height at which the circulation pump can self-prime.

That is, when the bathtub is installed at a lower position than the bathtub, there is an inconvenience that the distance is limited to the self-priming height, and in the conventional technology, no measures have been taken to deal with this inconvenience.

[Problem to be solved by the invention]

Conventionally, as illustrated in FIG. 2, in the installation relationship between the bathtub A and the appliance body, when the bathtub A is below the appliance body (for example, in the case of a bathtub on the first floor), the center of the bath adapter E is There is an inconvenience that the distance l (in FIG. 2) from the to the main body of the device is limited to, for example, 1.3 m in consideration of air intrusion.

In view of such problems with the conventional technology, the present invention is designed to remove air in the reheating circulation pipe as a preparation for reheating operation by removing it in advance by automatic hot water supply operation, and then restart reheating. To provide a bath device equipped with a reheating device for the purpose of extending the life of a circulation pump and easing restrictions on the installation height of the bathtub and the appliance body by starting operation.

[Means to solve the problem]

In order to achieve the above object, a bath device equipped with a reheating device of the present invention includes a reheating device that forcibly circulates hot water in the bathtub with a circulation pump to heat and raise the temperature, and a bathtub device that heats the bathtub through the reheating device. In a bath equipment equipped with a hot water supply device that supplies fresh hot water, when performing reheating operation, if the water flow switch installed in the reheating circulation pipe does not operate after a certain period of time, it is assumed that there is intruding air and the reheating circulation pipe is switched off. The present invention is characterized by providing an operation program that returns to reheating operation after air is removed from the reheating circulation pipe by automatic hot water supply operation to the outgoing pipe of the route.

The series of air bleeding operations described above is performed by controlling the circulation pump and the line switching valve by an electronic control device incorporating an operation program based on the detection of the presence or absence of air by the water flow switch.

[For production]

In the bath equipment equipped with the reheating device of the present invention having the above-mentioned tank bottom, when there is air in the reheating circulation pipe during the reheating operation, the water flow provided in the reheating circulation pipe is When this is detected and the water flow switch is not activated for a certain period of time, the automatic hot water supply operation starts, and hot water is supplied to the outgoing pipe of the reheating circulation pipe for a certain period of time. When the air in the heating circulation pipe is removed and air removal is completed by automatic hot water supply operation for a certain period of time, the original reheating operation is resumed and reheating operation is continued.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bath apparatus equipped with a reheating apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1, A is a bathtub, and both ends of a reheating circulation pipe 1 are connected to the bathtub A via a bath adapter E provided at the bottom of the bathtub A, and the reheating circulation pipe 1 is provided in the middle. The circulation pump P separates the outgoing pipe 2 and the returning pipe 3, and the returning pipe 3
A heat exchanger 4a for the bathtub 4 is installed in the middle of the bath, and the return pipe 3 is divided into a front half 3a and a rear half 3b, and the hot water in the bathtub A is reheated by a circulation pump P, and the circulation pipe 1 is connected to the return pipe 2. Return pipe from the side 3
A reheating device WIB is provided at the bottom of the bathtub A, which heats the hot water with a heat exchanger 4a and raises the temperature of the hot water in the bathtub A by forcing the hot water to circulate toward the side.

The reheating circulation pipe 1 of the reheating device FB is provided with a bypass communication pipe 5 that bypasses the circulation pump P and communicates the forward pipe 2 with the front half 3a of the return pipe 3. The first half 3a of the return pipe 3 and the bypass communication pipe 5 are connected to the branch part 3C on the side of the pipe 3 during hot water supply, and the first half 3a of the return pipe 3 is connected during reheating.
and a pipe line switching solenoid valve V for blocking the bypass communication pipe 5, and a branch part 2 on the outgoing pipe 2 side of the bypass communication pipe 5.
Connect the hot water supply pipe 6 to the outgoing pipe 2 closer to the circulation pump P than a,
Connection part 6a between the hot water supply pipe 6 and the outgoing pipe 2 near the circulation pump P
When hot water is being supplied, the hot water supply pipe 6 and the outgoing pipe 2 near the circulation pump P are connected, and when reheating, the hot water supply pipe 6 and the outgoing pipe 2 near the circulation pump P are connected. Moreover, the bypass communication pipe 5 is equipped with a pressure sensor 7 for detecting the water level in the bathtub A. In addition, a water flow switch S is installed between the branch part 3c of the bypass communication pipe 5 in the first half of the return pipe 3 of the reheating circulation pipe 1 and the heat exchanger 4a of the bath pot 4 (in the middle of the first half of the return pipe 3). In addition to issuing hot water supply and boiling water commands during reheating based on the water flow detection of the water flow switch S, it also controls the flow of air in the reheating circulation pipe l during reheating.
It is connected to the pipe switching solenoid valves V, , V, etc. via the electronic control device G, and in particular, during reheating operation, if the water flow switch S is inactive for a certain period of time, air will flow into the reheating circulation pipe. This means that the water heater 6 opens and operates the switching solenoid valve ■8 so that an automatic hot water supply operation for removing air from the outgoing pipe 2 of the reheating circulation path l is performed.
Hot water is supplied from the system, and when the air removal operation for a certain period of time is completed, the system is controlled to immediately return to reheating operation.

The bath pot 4 has a gas burner 4b that heats hot water passing through a heat exchanger 4a.
is supplied with fuel gas through a gas supply pipe 8 equipped with a main solenoid valve V1, a main solenoid valve ■, and a gas governor valve V, and combustion air is forcibly supplied from an air supply fan F1. It is a type of instant water heater.

The hot water supply device C that supplies fresh hot water to the bathtub A uses a forced air type instantaneous water heater similar to the bath pot 4 described above. That is, a water supply pipe 12 equipped with a water governor valve V is connected to the inlet side of the heat exchanger 11, a hot water outlet pipe 13 is connected to the outlet side, and a gas burner 14 is provided to heat the cold water passing through the heat exchanger 11.
This gas burner 14 has a former solenoid valve ■7 and a proportional control valve V6.
, fuel gas is supplied through a gas supply pipe 15 equipped with a switching solenoid valve V9, etc., and combustion air is forcibly supplied from an air supply fan F2, thereby configuring a forced air type instantaneous water heater. are doing. The hot water outlet pipe 13 is connected to one inlet of the automatic mixing faucet 16, a bypass pipe 17 branched from the water supply pipe 12 is connected to the other water inlet of the automatic mixing faucet 16, and the outlet of the automatic mixing faucet 16 is 7. connected to the hot water supply pipe 6 via a storage tank 18; Branch pipe 19 from hot water supply pipe 6
It is also equipped with a manual hot water tap 20 to enable hot water to be supplied to the sink. In addition to the mixing type instantaneous water heater of the embodiment, the water heater C may be an instantaneous water heater or a hot water storage type water heater with a hot water supply temperature control function. Also,
Instead of the storage tank 18 of the embodiment, the overflow pipe may be omitted and a vacuum breaker may be provided in the middle of the hot water supply pipe 6.

The operation of the bath equipment is controlled by an electronic control unit NG, which includes detection sensors, electromagnetic valves V, V, etc., and water flow switches S installed in each part.
The S circulation pump P is connected, and also sets the water supply temperature, water supply water level, boiling temperature, etc. to the required values, as well as setting values and commands input from the bath remote control 9 and hot water supply remote control 10 that command these operations. Based on this, the circulation pump P and each electromagnetic valve V, , V, etc. are controlled to operate the bath system.

In the above configuration, when heating the hot water in the bathtub A by the reheating device B, when the reheating switch of the bath remote control 9 is turned on, the magnetic valve V for switching the pipe is activated by a command from the electronic control device G. , (as shown in Figure 1) to shut off the first half 3a of the return pipe 3 and the bypass communication pipe 5, and close the pipe switching solenoid valve ■2 (as shown) to connect the hot water supply pipe 6 and Shut off the circulation pump P side of the outgoing pipe 2, start the circulation pump P, and transfer the hot water in the bathtub A to the bath adapter E-outgoing pipe 2.
- Circulation pump P - First half 3a of return pipe 3 - Heat exchanger 4a -
Forced circulation is carried out along the route from the rear half 3b of the return pipe 3 to the bath adapter E to the bathtub A.
If there is air inside, the hot water in the bathtub will not circulate, so the water flow switch S provided in the front half 3a of the return pipe 3 will detect this and will not operate, so the water flow switch S will not operate for a certain period of time (for example, minutes), the air bleeding command from the electronic control device G switches and opens the pipe switching solenoid valve ■1 (moves to the left in the figure) to connect the first half 3a of the return pipe 3 and the bypass communication pipe 5. , Switch and open the pipe switching solenoid valve ■2 (
The hot water supply pipe 6
The hot water is from the circulation pump P side of the outgoing pipe 2 and the circulation pump P-
One side from the branch part 3c is the front half part 3a of the return pipe 3 - the heat exchanger 4
a - rear half of return pipe 3 3b - bath adapter E → to bathtub A,
In addition, the other side is the bypass delivery pipe 5 - branch part 2a - outgoing pipe 2 -
The hot water flows from the bath adapter E to the bathtub A, hot water is supplied from the outgoing pipe 2 and the returning pipe 3 of the reheating circulation pipe 1, and the air in the reheating circulation pipe 1 is quickly removed. When this automatic hot water supply operation completes air bleeding for a certain period of time, an additional heating command is issued from the electronic control device G to the solenoid valves V, V for switching the pipes.
! is switched on and closed to form the above-mentioned reheating pipe, and at the same time, when the circulation pump P is activated and the water flow switch is turned on, fuel gas is sent to the gas burner 4b of the bath pot 4 to ignite and burn it, returning to the original reheating operation. The hot water in the bath ljA is heated to raise its temperature. This reheating operation is automatically stopped by detecting the temperature of the water in the bathtub A and receiving a command from the electronic control unit G, and can also be stopped manually using the bath remote control 9. In addition, in the reheating operation, if there is no air in the reheating circulation pipe 1, the water flow switch S immediately detects this and enters the reheating operation, and of course does not perform the air bleeding.

[Effect of the invention 2 As explained above, in a bath device equipped with a reheating device, when there is air in the reheating circulation pipe during reheating operation, after air is removed by hot water supply operation, Since the original reheating operation is started, air suction operation of the circulation pump is prevented, so the life of the circulation pump is extended. Here, even if the bathtub is located at a lower level than the bath device, the suction side lift is sufficiently ensured without being limited by the self-priming height, so there is an effect that the height dimension can be increased within the capacity range.

[Brief explanation of drawings]

FIG. 1 is a developed sectional view showing an embodiment of a bath apparatus equipped with a reheating device of the present invention, and FIG. 2 is an explanatory view showing an example of installing a bathtub. A... Bathtub, B... Reheating device, C... Hot water supply device, 1... Reheating circulation pipe, S... Water flow switch, 2
... Outgoing pipe, 3... Returning pipe.

Claims (1)

[Claims] A reheating device (B) that forcibly circulates the hot water in the bathtub (A) using a circulation pump (P) to heat and raise the temperature, and the reheating device (
B) In a bath device equipped with a hot water supply device (C) that supplies fresh hot water to the bathtub (A) through a water heater, a water flow switch (S) is installed in the reheating circulation pipe (1) for reheating operation. If it does not work after a certain period of time, the reheating circulation pipe (
A feature is that an operation program is provided in which air is removed from the outgoing pipe (2) of the reheating circulation pipe (1) by automatic hot water supply operation to the outgoing pipe (2) of 1), and then the operation returns to the reheating operation. Bath equipment equipped with a reheating device.