JP2721543B2 - Method of removing air from piping when filling hot water in automatic bath equipment with water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides hot water to a bath tub from an appliance body via an outgoing pipe and a return pipe of a circulation reheating line, and The water level is detected by a pressure sensor arranged in the pouring water passage,
The present invention relates to a method for removing air in a pipe at the time of hot water filling in an automatic bath apparatus with a water heater, which automatically stops the hot water when detecting that the bathtub water level has reached a set water level.

[Conventional technology]

FIG. 4 shows a conventional example of an automatic bath apparatus with a water heater. This apparatus includes a heat exchanger 2 for hot water supply and a heat exchanger 3 for additional heating in an appliance body 1, branches a tapping pipe of the heat exchanger 2 for hot water supply, and connects the branched tapping pipe to a vacuum breaker 4. ,Check valve
5,6, connected to the circulation reheating line in the bath tub via the pouring solenoid valve 7, the circulation reheating line has a reheating solenoid valve 8, a pressure sensor 9 and a pump 10; The hot water is supplied by a reheating solenoid valve 8
Is closed and the pouring solenoid valve 7 is opened to perform the operation through one of the circulation reheating lines.

That is, conventionally, the supplementary heating solenoid valve 8 is closed and the pouring solenoid valve 7 is opened to open the bathtub through the forward pipe 11 of the circulation supplementary heating pipeline.
13 is poured into the bath, and during that time, the bathtub water level including the air is detected by the pressure sensor 9, and when the pressure sensor 9 detects that the bathtub water level has risen above the bathtub circulation port and the detection pressure has increased,
The pouring solenoid valve 7 is closed once, the supplementary heating solenoid valve 8 is opened, and the pump 10 is driven to release air from the circulation supplementary heating pipe.
Thereafter, the pump 10 is stopped, the supplementary heating electromagnetic valve 8 is closed, and the pouring electromagnetic valve 7 is opened to fill the bathtub through the outgoing pipe 11 of the circulation supplementary heating pipeline. This is for accurately detecting the bathtub water level by the pressure sensor 9.

In the prior art, as described above, the hot water is supplied only through one of the circulation additional heating pipes. In order to prevent erosion, the hot water is supplied only at the hot water supply capacity of the hot water supply heat exchanger 2 or less. Therefore, there is a problem that a long time is required for filling with hot water.

The present inventor and the like, in order to improve such problems of the prior art, to fill the bath tub via both the forward pipe 11 and the return pipe 12 of the circulation reheating line Suggested.

FIG. 3 is a water system diagram of an automatic bath apparatus with a water heater which can be filled with water through the outward pipe and the return pipe.

In FIG. 3, 1 is an appliance body, 2 is a heat exchanger for hot water supply, 3 is a heat exchanger for recirculating reheating, 4 is a vacuum breaker, 5 and 6 are check valves, 7 is a pouring solenoid valve, 9 is Pressure sensor, 1
0 is a pump, 11 is an outgoing pipe of a circulation reheating line, 12 is a return pipe, 13 is a bathtub, 14 is a flow rate sensor disposed on a water supply pipe, and 15 is disposed on an outlet side of a heat exchanger for hot water supply. In the flow control valve, a branch tapping pipe is connected to the top of the circulation supplementary heating pipe without disposing an electromagnetic valve.

[Problems to be solved by the invention]

If hot water is filled using the apparatus shown in FIG. 3, it should be possible to use both the outgoing pipe 11 and the return pipe 12 of the circulation additional heating pipe to pour hot water. However, actually, the outgoing pipe 11 side and the return pipe
Even if the tip resistance on the 12 side is almost the same, there is a case where pouring can be performed only on one side.

That is, when the inside of the circulation additional heating pipe is initially empty, and when hot water is supplied from the branch tapping pipe, it is assumed that a large amount of water flows to the outward pipe 11 side due to some factor (there may be a large flow to the return pipe side. The cause is unknown). Then, a water level difference occurs between the outgoing pipe 11 side and the return pipe 12 side, and the water level difference causes the outgoing pipe 11 side.
When the flow rate is restricted, the flow rate on the return pipe side inevitably decreases, and finally the flow rate becomes zero and air is sucked in. Therefore, there is a problem that this phenomenon continues forever unless the pouring operation is stopped.

The above-mentioned problems are caused when the flow rate control valve 15 is throttled due to the capacity limitation of the water heater, or when the flow rate is limited by the wax thermostat, and the height from the connection point with the branch tapping pipe to the bathtub circulation port. This is likely to occur when h is large.

The present invention solves the above-mentioned problems, and in any case, a method for removing air in a pipe when filling with hot water, in which pouring can be performed using both the forward pipe and the return pipe of the circulation reheating line. Is to be provided.

[Means for solving the problem]

According to the first aspect of the present invention, the flow rate of water flowing through the hot water supply unit is set at a minimum flow rate x at which the air purging of the circulation reheating line can be performed when the filling of the hot water via the forward pipe and the return pipe of the recirculation reheating pipe is started.
Detects whether it is more than or less than /min.In the following cases, stop pouring once, equalize the water level between the outgoing pipe and the return pipe, perform pouring again, and continue pouring as it is above It is characterized by the following.

The invention according to the second aspect is characterized in that, when the filling of the hot water via the outgoing pipe and the return pipe of the circulation reheating pipe is started, the flow rate flowing to the water heater is the minimum flow rate x at which the air purging of the circulation reheating pipe can be performed.
It detects whether it is over / min or less, ignores the water control of the hot water supply circuit when it is below, opens the flow control valve, flows a flow of x / min or more for a predetermined time, returns it to the normal water control flow, and In this case, the pouring is continued as it is.

[Action]

According to the first aspect of the present invention, when it is detected that the flow rate flowing to the water heater is equal to or less than the minimum flow rate x / min at which the air purge can be performed, pouring is temporarily stopped, and the water levels of the outgoing pipe and the return pipe are equalized. Since the molten metal is poured again after that, when the molten metal is poured again, there is no difference in water level, and the filling can be performed via both pipes.

According to the second aspect of the present invention, when it is detected that the flow rate flowing to the water heater is equal to or lower than the minimum flow rate x / min at which the air purge can be performed, the water control of the hot water supply circuit is ignored, and the flow rate control valve is opened to open the flow rate control valve at x / min. Since the above flow is returned to the normal water control flow after flowing for a predetermined time, the water control of the hot water supply circuit is ignored.
By flowing a flow rate of x / min or more, the air in the pipe is evacuated, and thus the filling through both pipes can be performed.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS.

 FIG. 1 is a flowchart according to the first aspect of the invention.

As shown in FIG. 1, after starting pouring, the flow rate sensor
The flow rate flowing through the hot water supply heat exchanger 2 is detected by 14 and it is determined whether the flow rate is equal to or less than the minimum flow rate required for air purging (for example, 14 / min in the case of a water heater having the capability of No. 16). Then, in the following cases, pouring is stopped once, the water levels of the outgoing pipe and the return pipe are equalized, and then pouring is performed again. After that, the next flow (RET) set on the remote control
Move to. In the case of 14 / min or more, pouring is continued without stopping pouring.

 FIG. 2 is a flowchart according to the second aspect of the invention.

As shown in FIG. 2, after starting pouring, the flow rate sensor
The flow rate flowing to the hot water supply heat exchanger 2 is detected by 14 and the flow rate is determined to be the minimum flow rate required for air purging (for example, 14 / m
in) Judgment is made below, and in the following cases, the water control of the hot water supply circuit set on the remote controller is ignored (for example, the set temperature is ignored), and the water control valve 15 is opened to the maximum to 14 / min.
After the above-mentioned hot water is flown and a predetermined time (for example, one minute) has elapsed, the control returns to the normal water control set on the remote controller, and shifts to the next flow. In the case of 14 / min or more, pouring continues without ignoring the water control.

〔The invention's effect〕

As described above, according to the present invention, when pouring from one of the outgoing pipe and the return pipe of the recirculating reheating line due to some cause, this is detected and the cause is detected. In other words, there is an effect that hot water can be filled through both pipes.

[Brief description of the drawings]

FIG. 1 is a flow chart showing the invention of the first item, FIG. 2 is a flow chart showing the invention of the second item, and FIG. 3 is a water system diagram showing an example of an automatic bath apparatus to which the present invention is applied. FIG. 4 is a water system diagram showing an example of a conventional automatic bath apparatus. 2 ... Heat exchanger for hot water supply, 3 ... Heat exchanger for recirculation heating, 7
...... Pouring solenoid valve, 9 ... Pressure sensor, 10 ... Pump, 11
… Outgoing pipe of circulation reheating line, 12… Return pipe, 13… Bathtub, 14… Flow sensor, 15… Flow control valve.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomoaki Oka 312, Kamiyama, Matsuda-machi, Ashigara-gun, Kanagawa Prefecture (72) Inventor Tatsuya Wada 328, Kamesugada-cho, Hodogaya-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Shuichi Onodera Kanagawa Prefecture 3158-1 Fukami, Yamato-shi (72) Inventor Hironori Nozaki 4- 15-18 Fukamidai, Yamato-shi, Kanagawa 102 Kanai Heights 102 (56) References JP-A-1-95251 (JP, A) JP-A-63- 259348 (JP, A)

Claims (2)

(57) [Claims] 1. A hot water bath is filled from an appliance body to a bath tub via an outgoing pipe and a return pipe of a circulation reheating line, and a water level in the bath tub is provided by a pressure sensor disposed in a pouring water passage. Detect
In an automatic bath apparatus with a water heater that automatically stops the filling when detecting that the bathtub water level has reached the set water level, filling the filling via the outgoing pipe and the return pipe of the circulation reheating line is performed. When started, the flow rate to the water heater is the minimum flow rate x / m that can perform air purging of the circulation reheating line
Detecting whether it is less than or more than in, temporarily stop pouring in the following cases, equalize the water level between the outgoing pipe and the return pipe, perform pouring again, and continue pouring as it is above A method for removing air from piping when filling hot water in an automatic bath apparatus with a water heater. 2. A hot water bath is filled from an appliance body to a bath tub via an outgoing pipe and a return pipe of a circulation reheating line, and a water level in the bath tub is provided by a pressure sensor disposed in a pouring water passage. Detect
In an automatic bath apparatus with a water heater that automatically stops the filling when detecting that the bathtub water level has reached the set water level, filling the filling via the outgoing pipe and the return pipe of the circulation reheating line is performed. When started, the flow rate to the water heater is the minimum flow rate x / m that can perform air purging of the circulation reheating line
In the following case, the water control of the hot water supply circuit is ignored, the flow control valve is opened, the flow of x / min or more is flowed for a predetermined time, and then the normal water control flow is returned. A method of removing air from a pipe when filling a hot water in an automatic bath apparatus with a water heater, wherein pouring is continued as it is.