JPH02267459A - Method of controlling tab water level in automatic bath device - Google Patents

Abstract

PURPOSE:To enable hot water to be dropped up to a set water level at a less number of times of hot water supply by a method wherein after a predetermined hot water supply is carried out in a bath tub, an amount of hot water corresponding to a water level difference between a target water level and the water level after second dropping multiplied by a sectional area is dropped into the bath tub. CONSTITUTION:After a predetermined hot water supply operation is carried out to detected a reference water level (a bath adapter level) LB, a hot water of a specified amount q1 is dropped into a bath tub 2 in response to a flow rate sensor 15, an increased amount of water h1 is detected by a pressure sensor 9 so as to calculate a means bath tub section area S1=q1/h1 at this water level. A water level difference between this water level and the target water level LS0 is expressed as h2=(HS0-h1), so that a bath tub sectional area is kept constant and a hot water of amount q2=(HS0-h1)q1/h1 is dropped into the bath tub. However, since the bath tub 2 has a wider upper part, an actual water level increasing amount h20 is detected by the pressure sensor 9 so as to calculate a means bath tub sectional area S2=q2/h20 at this water level. A height from this water level to the target water level LS0 is of h3=(h2-h20), so that a hot water of amount q3=h3q2/h20 is dropped into the bath tub, resulting in that the water level reaches the target water level LS0.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to a method for controlling the filling of hot water in an automatic bathing device.

[Background technology]

In conventional automatic bath equipment, as shown in the flowchart in Figure 5, the position of the reference water level (bath adapter) is detected by repeatedly dropping a small amount (10!I) of hot water and determining the circulation. After detecting the reference water level, pour hot water into the bathtub little by little and detect whether the water level has risen above the set water level, and the water level exceeds the set water level set at a certain distance from the reference water level. Repeatedly adding equal amounts of hot water until the end. When the water level exceeds the set water level, hot water supply is stopped, and the hot water in the bathtub is refilled until the set temperature is reached.

[Problem to be solved by the invention]

With conventional automatic bath equipment, as mentioned above, after memorizing the standard water level, the same amount of hot water is poured into the bathtub several times little by little and the water level is compared with the set water level, so the water reaches the set water level. The sequence for accumulating is complicated.

In particular, in order to supply hot water to the set water level, it was necessary to repeatedly pour small amounts of hot water over and over again, which took a long time to supply.

However, the present invention was made in view of the conventional example of soft soil, and its purpose is to make it possible to drop hot water to a set water level with fewer hot water supply times, and to improve the accuracy of water level. The purpose of the present invention is to provide a method for controlling hot water filling.

[Means to solve the problem]

For this reason, the method for controlling hot water filling in an automatic bath device of the present invention is as follows:
After performing a predetermined hot water supply operation in the bathtub, a certain amount of hot water is poured into the bathtub, the amount of rise in the water level is detected, the cross-sectional area of the bathtub at that water level is determined from the amount of water and the amount of rise in the water level, and the target water level at that water level is determined. A further amount of hot water corresponding to the product of the water level difference between The method is characterized in that the cross-sectional area of the bathtub at the water level is determined, and an amount of hot water corresponding to the product of the cross-sectional area and the water level difference between the target water level and the water level after the second pouring is further poured into the bathtub.

[Effect]

In the present invention, the cross-sectional area of the bathtub is determined by pouring a certain amount of hot water into the bathtub, and the amount of hot water up to the target water level is poured all at once, so the number of times hot water is poured is small and the sequence can be simplified.

Moreover, even if the amount of hot water that reaches the target water level is poured in, if the water level does not reach the target water level due to the spread above the bathtub, the water level will be lowered to a level closer to the target water level after pouring hot water up to the target water level. Since the next amount of water to be dropped is determined using the cross-sectional area of the bathtub, it is possible to quickly approach the target water level and improve water level accuracy.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, in which 1 is an automatic bath device, 2 is a bathtub having a substantially constant cross-sectional area, and 3 is a bathtub having a substantially constant cross-sectional area.
4 is a reheating circuit, and 4 is a hot water supply circuit. Reheating circuit 3 is
An outgoing path 6a connects the pump 10 to the bath adapter 5 of the bathtub 2 via the bath heat exchanger 7, and the bath adapter 5.
to the pump 10, and an outgoing path 6b.
A pressure sensor 9 and a water flow switch 8 are provided in the middle of the return path 6b, and a thermistor 21 is provided in the middle of the return path 6b.

The hot water supply circuit 4 includes a flow rate sensor 22, a thermistor 17, a hot water supply heat exchanger 11, a flow rate adjustment valve 18, a thermistor 19,
Reheating circuit 3 via flow rate adjustment valve 14, flow rate sensor 15, vacuum breaker 20, shutoff valve 12, and check valve 13
It is connected to the. Reference numeral 16 denotes a branch hot water supply path that branches off from the middle of the hot water supply circuit 4 and reaches an appropriate hot water supply point. Further, a control section (not shown) of the automatic bath device 1 includes a microcomputer, and performs various calculations, judgments, controls, storage, and the like.

The flow rate sensor 15 detects the flow rate of hot water supplied from the hot water supply circuit 4 into the bathtub 2 through the reheating circuit 3, and the flow rate detection signal is sent to a control section (not shown). The control unit integrates this flow rate value and calculates the water volume (11
fjE flow rate).

Moreover, the pressure sensor 9 indirectly detects the water level in the bathtub 2 as water pressure. The relationship between the output P of this pressure sensor 9 and the amount of water 1 is shown in FIG. Pressure sensor 9
The output P increases until the outgoing path 6a is filled with hot water (amount of hot water supplied until the outgoing path 6a is filled with hot water; ρl),
After filling the outward journey 6a with hot water, the bus adapter level LB
Until the water level reaches (the amount of water when the hot water reaches the bath adapter level LB; j2) shows a constant value P1, and the output P at the set water level changes from the output Pl at the bath adapter level LB.
It increases proportionally up to 2. Note that ρ3 is the amount of water when the set water level is reached.

Next, the hot water filling operation by the automatic bath device with the above configuration is performed in the third stage.
This will be explained according to the flowchart shown in the figure and the explanatory diagram shown in FIG.

First, when the automatic switch is turned on, the shutoff valve 12 is opened, and hot water of a fixed amount Qo (for example, 101) is repeatedly dropped into the bathtub 2 from the hot water supply circuit 4.

Each time qo of hot water is poured in, the shut-off valve 12 is closed, the pump 10 is operated, and the water flow switch 8 performs a circulation determination to determine the presence or absence of residual water, and after the circulation determination, the pump 10 is stopped. In the circulation determination, if there is hot water in the bathtub 2 that is equal to or higher than the bath adapter level LB, it is determined that there is water, and if the hot water is equal to or lower than the bath adapter level LB, it is determined that there is no water. If this circulation judgment is “J without water, Q again”
If o hot water is dropped and the circulation judgment is "water present", the circulation judgment is made in the same way again. In this way, when it is determined that "water is present" twice in the circulation judgment (that is, the water flow switch 8 detects twice that the water level exceeds the bus adapter level LB), the pump 10 is stopped and qo of hot water is supplied. finish. Furthermore, the number of times the Qo has been dropped so far is determined, and if the number of times the Qo has been dropped is less than n times < nqo is determined to be equal to the water level below the bath adapter 5, for example 13 times), the remaining water in the bathtub 2 is Assume that there is water. On the other hand, if it is n times or more, the water level at that time (at the position of the bus adapter 5) is memorized and the reference water level L
Let it be B. The target water level LSo is assumed to be at the height of (so) based on this reference water level (bus adapter level) LB, for example, Hso = 350 m.

After detecting the reference water level LB in this way, the shutoff valve 12 is opened and a fixed amount of ql (for example, 401) of hot water is dropped into the bathtub 2.The shutoff valve 12 is then closed and the pump 10 is operated to reheat the bath water. 3 to expel the air in the circulation circuit 3. At the same time, the amount of water level rise h due to the amount of water in 91
1 is detected by the pressure sensor 9. Thereby, the cross-sectional area (average) of the bathtub at this water level S, = q/h t is determined. The water level difference between this water level and the target water level LSo is h
2 = (Hso ht), so if the cross-sectional area of the bathtub is constant, q2 = (Hso ht) If ql/ht of water is poured into the bathtub, the water level will be the target water level LS.

reach. Therefore, the shutoff valve 12 is opened and q2 of hot water is dropped into the bathtub 2. However, since the bathtub 2 is actually wider at the top, the water level does not reach the target water level LSo. The actual water level rise due to circulation and expulsion of air and the dropping of 92 hzo
is detected by the pressure sensor 9. And the cross-sectional area of the bathtub (average) at the water level raised by dropping q2
Find S=qa/haa. The height from the current water level to the target water level LSo is hi = (h211ao), so if the cross-sectional area of the bathtub is also constant, q3 = hs Q2
/hz.

When the amount of hot water is dropped, the water level reaches the target water level LS0. At this time, the water level actually rises only by hso (<h3), and a water level difference of h4 occurs between the target water level LSo. However, since this water level difference h4 is a small error (for example, if the first and second errors are each 0.2, the total is 0.2X0.2 =
The result is 0.04, and the error is within 4%. ), the pouring of hot water ends here, and the water level at this time is set as the set water level LS. In addition, if the distance H to the desired set water level LS is set a little larger than the distance H to the target water level LS, the water level when q is dropped and the desired set water level L
It is also possible to set the difference with S to 0.

After this, the amount of water Qsot (= q1 + q2 + (13)) required to supply hot water from the standard water level LB to the set water level is memorized, and from the second time onwards when filling hot water, refilling water, etc., the amount of water Qsot (= q1 + q2 + (13)) required to supply hot water from the standard water level LB to the set water level is Tot's hot water is poured all at once.

However, this does not prevent the above operation from being repeated each time hot water is supplied.Also, in the above example, the setting operation ended when q3 of hot water was poured, but the above steps can be repeated further to achieve a higher set water level. There is no problem in bringing it close to the water level.

〔Effect of the invention〕

According to the present invention, in short, a certain amount of hot water is poured into the bathtub to determine the cross-sectional area of the bathtub, and the amount of hot water up to the target water level is poured in at once, so the number of times hot water is poured is reduced and the sequence can be simplified. Moreover, even if the amount of hot water that reaches the target water level is poured in, if the water level does not reach the target water level due to the spread above the bathtub, the water level will be lowered to a level closer to the target water level after pouring hot water up to the target water level. Since the next amount of water to be dropped is determined using the larger cross-sectional area of the bathtub, the target water level can be quickly approached and the water level accuracy can be improved.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing an embodiment of the present invention, Fig. 2 is a graph showing the relationship between the output of the pressure sensor and the amount of water, Fig. 3 is a flowchart during hot water supply as above, and Fig. 4 is an explanation of the same as above. FIG. 5 is a flowchart of a conventional example. 2... Bathtub 3... Reheating circuit 4... Hot water supply circuit 9... Pressure sensor 15... Flow rate sensor diagram

Claims (1)

[Claims] (1) After performing the specified hot water supply operation in the bathtub, drop a certain amount of hot water into the bathtub, detect the amount of rise in the water level, calculate the cross-sectional area of the bathtub at that water level from the amount of water and the amount of rise in the water level, and calculate the water level. further dropping into the bathtub an amount of hot water corresponding to the product of the water level difference from the target water level and the cross-sectional area of the bathtub, and detecting the amount of increase in the water level due to the second pouring;
The cross-sectional area of the bathtub at the water level is determined from the amount of water poured in for the second time and the amount of rise in the water level, and an amount of hot water corresponding to the product of the cross-sectional area and the difference in water level from the target water level at the water level after the second pouring is added to the bathtub. A method for controlling hot water filling in an automatic bath device, characterized in that: