JPH0470541B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a reheating operation method in an automatic bath device with a water heater for home use.

[Prior Art] An automatic bath device with a water heater is configured as shown in FIG. 5, for example.

That is, in FIG. 5, reference numeral 1 denotes a main body of the appliance, which houses a heat exchanger 2 for hot water supply and a heat exchanger 3 for reheating. The bathtub 13 and the reheating heat exchanger 3 installed at a position away from the appliance main body 1 are as follows:
They are connected via an outgoing pipe 12 and a return pipe 11, and a pump 4 is installed in the middle of the return pipe 11.
A pressure sensor 5 and a water flow switch 6 are installed in the pipe on the suction side of the pump, and a circulation reheating pipe is constituted by a return pipe 11, a pump 4, a heat exchanger 3, and an outgoing pipe 12. 10 is a solenoid valve disposed in the return pipe 11.

A water supply pipe 16 and a hot water supply pipe 17 are connected to the hot water supply heat exchanger 2, a flow sensor 14 is provided in the middle of the water supply pipe 16 to form a hot water supply pipe, and this hot water supply pipe is further connected to a branch pipe 18. by hoppa 1
5, and a solenoid valve 7 is installed at the outlet of this branch pipe 18. The lower part of the hopper 15 is connected to the return pipe 11 of the circulation reheating pipe through the solenoid valve 8, so that water (hot water) can be supplied from the hot water supply heat exchanger 2 to the reheating pipe. There is. In addition, 19
is a bypass pipe provided so that hot water is supplied to the bathtub from both the outgoing pipe 12 and the return pipe 11 of the reheating pipe when water (hot water) is supplied, and a solenoid valve 9 is provided in the middle of the bypass pipe.

In addition, in this type of automatic bath equipment, opening and closing of various solenoid valves, driving of pumps, control of burners, etc. are all automatically controlled by a microcomputer control device, and a remote controller (hereinafter referred to as remote control) (not shown) is used. ), set the desired water level and boiling temperature, and turn on the operation switch.The hot water supply heat exchanger 2 obtains hot water close to the set temperature and fills the bathtub, bringing the water level in the bathtub to the set water level. When this temperature reaches the set temperature, the pressure sensor 5 detects this and automatically stops filling the hot water, and then the pump 4 is driven and the reheating heat exchanger performs reheating operation up to the set hot water temperature.

In addition, the remote control for this type of automatic bath equipment is equipped with a reheat operation switch, and when the reheat operation switch is turned on while there is hot water (water) in the bathtub, the pump 4
The reheating operation is performed by driving the reheating heat exchanger until the set water temperature is reached.

[Problem to be solved by the invention]

By the way, in the automatic bath device, the reheating operation is performed when there is hot water (water) in the bathtub, but the conventional device has the following problems.

In other words, when filling the water automatically,
As shown in Figure 2, inside the device 1 and the circulation outgoing pipe 1
2. The return pipe 11 is also filled with water, but when the bathtub is emptied afterwards, if the appliance 1 is above the bathtub, water will be filled inside the appliance 1 and the circulation outgoing pipe 12, as shown in Figure 3. The return pipe 11 also becomes air, and if water is poured into the bathtub in this state, the inside of the piping and the equipment above the water level of the bathtub become air, as shown in FIG.

Therefore, when the reheating operation switch is turned on in the state shown in Figure 4, there is air in the piping, so a waiting time is required for the pump to draw in the bathtub water and circulate it properly, and the air is turned on. There is a problem that noise is generated due to crowding.

The present invention aims to improve the problems of the prior art as described above, and to provide a reheating operation method that can always perform normal reheating operation under any conditions when the reheating operation switch is turned on. It is.

[Means to solve the problem]

In order to achieve the above object, the present invention constantly monitors the water level in the bathtub using a pressure sensor even when the appliance is stopped, regardless of whether the operation switch on the remote control side or the automatic operation switch is on or off. If the water level has never fallen below the circulation fitting, turning on the reheating operation switch will immediately start reheating operation, but if it is detected that the water level in the bathtub has fallen below the circulation fitting even once, the reheating operation switch will be turned on. When turned on, control is performed so that the air in the piping is removed by the pouring operation, and then the reheating operation is started.

[Effect]

As mentioned above, the present invention constantly monitors the water level in the bathtub using a pressure sensor regardless of whether the automatic operation switch is turned on or off, that is, even when the equipment is stopped, and the water level never drops below the circulating fitting. When the reheating operation switch is turned on, the reheating operation starts immediately. However, if the water level of the bathtub has fallen below the circulation fitting even once, when the reheating operation switch is turned on, the pipes will be reheated by pouring water. Since the reheating operation starts after removing air from the inside, the pump can always return to normal operation without running idle.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In the present invention, as shown in FIG. 1, the water level in the bathtub is constantly monitored by the pressure sensor 5 even when the device is not operating. Once it detects that the water level in the bathtub has fallen below the bathtub's circulation fitting, it will perform a pouring operation to bleed air from the piping, no matter how the water level in the bathtub changes. After that, perform a refiring operation. That is, when the reheating operation switch is then turned on, the solenoid valves 7, 8, and 9 are opened and the pump 4 is driven to pump a certain amount of air into the outgoing pipe 12 and the return pipe 11 (while the pipes are empty). After that, the solenoid valves 7, 8, and 9 are closed and the pump 4 is stopped, and the solenoid valve 10 is opened and the pump 4 is driven to supply heat for reheating. Reheating operation via exchanger 3 is performed.

In addition, as described above, the water level in the bathtub is constantly monitored by the pressure sensor 5, and when the water level in the bathtub has never fallen below the circulation fitting, the solenoid valve 10 is opened when the reheat operation switch is turned on. At the same time, the pump 4 is driven to immediately perform reheating operation.

〔Effect of the invention〕

As described above, according to the present invention, the water level in the bathtub is constantly monitored by the pressure sensor even when the device is stopped, and if the water level in the bathtub even once falls below the position of the circulation fitting, the air After draining, reheating operation is performed, and reheating operation is started immediately only when the water level never drops below the circulation fitting, so there is no longer a waiting state until the pump draws bath water as in the past, and there is no need to wait in any case. However, normal reheating operation can always be performed.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the reheating operation method according to the present invention. FIGS. 2 to 4 are explanatory views showing the appliances in different states and the presence or absence of air in the piping, and FIG. 5 is an explanatory view showing an example of the configuration of an automatic bath apparatus with a water heater. 1... Appliance body, 2... Heat exchanger for hot water supply, 3...
...Heat exchanger for reheating, 4...Pump, 5...Pressure sensor, 6...Water switch, 7, 8, 9, 10...
... Solenoid valve, 11 ... Circulation return pipe, 12 ... Outgoing pipe, 13 ... Bathtub, 14 ... Flow sensor, 15
... Hotsupa, 16 ... Water supply pipe, 17 ... Hot water pipe,
18...branch pipe, 19...bypass pipe.

Claims (1)

[Claims] 1 The appliance body is equipped with a hot water supply heat exchanger and a reheating heat exchanger, and when the automatic operation switch is turned on, hot water is filled from the appliance body to the bathtub via the circulation reheating pipe, and the bathtub is filled with hot water. The water level is detected by a pressure sensor installed in the circulation reheating pipe and the set water level is set.
In an automatic bath system with a water heater that automatically stops at a set water temperature and also boils the hot water in the bathtub to the set temperature when the reheat operation switch is turned on, the pressure sensor monitors the water level in the bathtub when the equipment is operated. This is done even when the bathtub is stopped, and if the water level in the bathtub never falls below the circulation fitting, turning on the reheating operation switch immediately starts the reheating operation, but it detects even once that the bathtub water level has fallen below the circulation fitting. Then, when the reheating operation switch is turned on afterwards, the reheating operation in an automatic bath device with a water heater is controlled so that the air in the piping is removed by pouring water and then the reheating operation is started. Method.