JPH0745971B2 - Automatic bath equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

2. Description of the Related Art An automatic bath device of this type is disclosed in Japanese Examined Patent Publication No. 4-57940, in which the hot water can be poured from the water heater to the bath and the water level in the bath is equivalent to that of the bath. Pressure is monitored by a semiconductor sensor,
When the detected water pressure drops below the set water level by a predetermined water level and the water level below the water drop level continues for a certain period of time, water is automatically replenished from the water filling circuit to the bathtub.

Therefore, when the water level in the bathtub falls to a certain level lower than the set water level, water can be automatically replenished,
The water level in the bathtub is constantly maintained at the set water level. In addition, in the case where the state of descending to the falling water level continues for a certain time,
Since the water refilling operation is executed, it is possible to prevent the operation due to the chattering of the output of the semiconductor sensor due to the waving of the water surface in the bathtub.

However, according to this prior art, the condition in which the water level in the bathtub is drastically lowered, such as when a bather leaves the bathtub or when a large amount of hot water in the bathtub is pumped out, etc. However, the refilling operation is not executed unless this state continues for a certain period of time. The present invention has been made in view of the above point, "providing a water filling circuit (11) for supplying water from the water heater (1) to the bathtub (B), and the water level in the bathtub (B) is higher than the set water level. In the automatic bath device that executes the water refilling operation when the water level drops, it is possible to perform the water refilling operation according to the degree of the water level drop in the bathtub (B), and The task is to reduce the waiting time.

[0004]

[Technical Means] A technical means of the present invention for solving the above-mentioned problem is to provide a pressure sensor (S) for detecting a pressure corresponding to a water level in a bath (B), and to detect the pressure sensor (S). Water pressure
(H) and the set pressure (H ₀ ) corresponding to the set water level above
(dh) is calculated, and if this pressure difference (dh) is greater than the set value α, the water refilling operation is executed immediately.
Waiting time to execute water refilling operation as (dh) becomes smaller
The water replenishment control device (C) was set so that (T ₀ ) could be set longer ”.

[0005]

The above technical means operates as follows. Bathtub
The water level in (B) is monitored by the pressure sensor (S). Then, in the water replenishment controller (C), the differential pressure (dh) between the detected water pressure (H) from the pressure sensor (S) and the set pressure (H ₀ ) is calculated. When the pressure difference (dh) is equal to or higher than the set value α, the water replenishment operation is executed immediately, and when the pressure difference is equal to or lower than the set value α, as the pressure difference (dh) decreases, the waiting time (T ₍₀ ) is controlled to be set to be long, and this water refilling operation is executed.

Therefore, when the differential pressure (dh) is large, the rehydration operation is immediately executed when this condition is met. or,
When this differential pressure (dh) is small, the waiting time (T ₀ ) is set long. Note that this waiting time (T ₀ ) is set inversely proportional to the value of the differential pressure (dh), so when the water level in the bathtub (B) is close to the set pressure (H ₀ ), this The waiting time (T ₀ ) is significantly longer.

As described above, the waiting time (T ₀ ) until the water supply operation is started is set according to the degree of decrease in the water level in the bathtub.

[0008]

[Effect] The waiting time (T ₀ ) until the rehydration operation is started is
Since it is set according to the degree of decrease in the water level in the bathtub, it is possible to prevent the inconvenience that the waiting time for the water supply operation becomes longer than necessary.

[0009]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. In the case of the automatic bath device of the embodiment, the water heater (1)
A hot water filling circuit (11) via the heat exchanger (10) and a circulation heating circuit (21) via the heat exchanger (20) for reheating are formed between the bath device and the bathtub.

A circulation pump (P) is inserted in the circulation heating circuit (21) to enable forced circulation. The hot water outlet pipe from the heat exchanger (10) is connected to the suction side of the circulation pump (P). Therefore, this tap pipe and circulation heating circuit (2
Part of 1) becomes the water filling circuit (11), and when filling the bathtub (B), the circulation pump (P) is put into the operating state and the water filling circuit inserted in this water filling circuit (11). Open the valve (12). As a result, hot water of a predetermined temperature heated by the heat exchanger (10) is directly filled in the bathtub (B) through the water filling circuit (11),
The amount of water filling is measured by the flow rate type (Q), and when this measured value reaches a set value, the water filling valve (12) is closed to stop the water filling operation.

Now, the water level in the bathtub (B) changes to the set pressure (H
It is set to the set water level corresponding to ₀ ). After this, the water pressure corresponding to the water level in the bathtub (B) is detected by the pressure sensor (S) provided in the circulation heating circuit (21). This detected water pressure (H)
Is input to the water replenishment controller (C), and the operation of waiting time (T ₀ ) until the water replenishment operation is started is executed. or,
The water filling valve (12) and the circulation pump (P) are controlled according to the calculated value. In this embodiment, the amount of water supplied to the bathtub (B) by one refilling operation is set to the set amount (V).

The control operation of the water replenishment controller (C) will be described with reference to the flow chart shown in FIG. When the water refilling control is activated, the pressure sensor (S) detects the detected water pressure (H) corresponding to the water level in the bath (B), and this and the set pressure (H
₀ ) and the differential pressure (dh) is calculated and stored.

In the next step, the differential pressure (dh) is compared with the set value α, and when the differential pressure (dh) is larger than the set value α, the water refilling operation is immediately executed. As a result, water is replenished until the measured value of the flow rate type (Q) reaches the set amount (V) .When the replenishment of the set amount (V) is completed, the filling valve (12) is closed and the differential pressure (dh) is calculated. Return to step (31) of. If the differential pressure (dh) is less than the set value α, the waiting time (T ₀ )
Calculated by (32), this value is set as a function of differential pressure (dh).

In this embodiment, the waiting time (T ₀ ) is set to be about 0.1 second to 5 minutes. Then, after this waiting time (T ₀ ) is stored, the timer (A) is reset and the elapsed time of this timer is
When it becomes (T ₀ ), the water replenishing operation from step (33) to step (34) is executed.

After that, when the replenishment of the set amount (V) is completed,
Water filling valve (12) is closed and differential pressure (dh) calculation step (31)
Return to. If the differential pressure (dh) is large, the set water level will not be reached by replenishing the water once, and thus the replenishing operation will be executed a plurality of times. It goes without saying that the arithmetic expression of the waiting time (T ₀ ) can be variously set according to the actual condition of the device.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an embodiment of the present invention.

FIG. 2 is a flowchart showing the control operation of the main part of the water replenishment controller (C).

[Explanation of symbols]

(1) ・ ・ ・ ・ Water heater (B) ・ ・ ・ ・ Bathtub (11) ・ ・ ・ ・ Water filling circuit (S) ・ ・ ・ ・ Pressure sensor (H) ・ ・ ・ ・ Detected water pressure (H ₀ ) ・・ ・ ・ Set pressure (dh) ・ ・ ・ ・ Differential pressure (T ₀ ) ・ ・ ・ ・ ・ ・ Waiting time (C) ・ ・ ・ ・ Water replenishment controller

Claims (1)

[Claims] 1. A water filling circuit (11) for supplying hot water from the water heater (1) to the bathtub (B) is provided so that the water supply operation is executed when the water level in the bathtub (B) drops below the set water level. In the automatic bath equipment, the pressure sensor (S) that detects the pressure corresponding to the water level in the bathtub (B) is provided, and the detected water pressure (H) of the pressure sensor (S) and the set pressure ( H ₀ ), the differential pressure (dh) is calculated, and if this differential pressure (dh) is greater than or equal to the set value α, the water refilling operation is executed immediately, and if it is less than or equal to the set value α, the differential pressure (dh) is An automatic bath system equipped with a water replenishment controller (C) that sets the waiting time (T ₀ ) until the water refilling operation becomes longer as it gets smaller.