JPH02169952A - Bath boiler provided with hot water supply function - Google Patents

Abstract

PURPOSE:To measure exactly a standard water pressure and make it possible to effect exact hot water supply in a bath tub by projecting the end section of a hot water supply circuit into a bath tub and bending the section near the tip of the end section upwards into the bath tub. CONSTITUTION:The tip end section of a hot water filling circuit 17 is bent upwards in a bath tub 2 to form an upright section 49. Accordingly if a valve 4 inserted into the hot water filling circuit 17 is closed and water is filled up to the riser section 49 at the downstream end of the circuit 17, the air that is much lighter than water does not enter downwards into the upright section 49 filled with water so that the filled water does not leak into the bath tub 2. Consequently a reference water-pressure PO that is measured by a water pressure gauge 34 for the filled water which does not leak out is exact. After this the standard water pressure PO which is measured exactly is utilized to proceed the filling operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bath kettle, and particularly to a bath kettle equipped with a hot water filling function.

[Prior art and its problems] AI is used to automatically stop the hot water filling operation when the hot water in the bathtub reaches a certain level.
We have already proposed a bathtub with a configuration roughly shown in Figure 5. An on-off valve (4) and a water pressure gauge (34) are provided in this order.

In this device, when a hot water filling switch (not shown) is turned on, an on-off valve (4) is opened, and hot water is supplied from a water pump (not shown) provided in a water heater (5) to the bathtub (2) side. The water flows and the filling operation progresses.

Compared to natural circulation type bathtubs, forced circulation bathtubs equipped with water pumps and high-temperature heaters do not require the installation heights of the bathtub (2) and bathtub (A) to be exactly the same. In this type of bathtub, the installation positions of the bathtub (2) and the bathtub (A) are shifted from each other in the height direction and are uneven for each appliance installed. That is, for each appliance to be installed, the water pressure gauge (34) installed in the bathtub (A) and the bathtub (
2) is shifted in the height direction, and the difference in height between the two is not constant.

Therefore, even if the different installed bathtubs (2) are filled with hot water to the same water level due to the uneven height difference between the bathtub (2) and the water pressure gauge (34), , the output of the water pressure gauge (34) is not constant, that is, even if the water in the bathtub (2) has reached the water level at which the water is filled, the water pressure gauge (34)
does not necessarily give a signal that the water has been filled.

In order to solve this problem, in the above-mentioned bathtub, the hot water filling circuit (17) is connected to an opening (hereinafter referred to as the spout (28)) that opens into the side wall of the bathtub (2) when the hot water is completely filled. The water pressure corresponding to the difference in water head between the installed equipment and the bathtub (2
) is always constant regardless of the magnitude of the height difference, and the water pressure corresponding to the water head difference is used to determine the completion state of hot water filling.

In other words, at the beginning of filling with hot water when hot water starts being supplied from the water heater (5), the water is filled up to the spout (29) of the drying circuit (17) that is open on the side wall of the bathtub (2). When water is supplied and the flow path between the spout (29) and the on-off valve (0 is filled with water, the on-off valve (4) is closed and the on-off valve (0) is filled with water.
A control device installed in the device sets the water in a state where water is confined in the wave path on the downstream side of 0, and controls the water pressure detected by the water pressure gauge (34) after this state is established (hereinafter referred to as reference water pressure (PO)). to be memorized. Then, the above reference water pressure (P0) is determined by the water pressure gauge when it is assumed that filling water is supplied into the bathtub (2) and the water level in the bathtub rises to the spout (2e) of the hot water filling circuit (17). (34) is equal to the water pressure to be detected.

Then, the on-off valve (4) is opened again to continue the filling operation, and when the spout (28) is immersed in the filling water in the bathtub (2), it will rise as the filling operation continues. The detected water pressure (P) of the water pressure gauge (34) and - the above reference water pressure (P0)
(P-P0) (this water pressure difference is always constant regardless of the height difference between the bathtub (2) and the installed bath pot (A)). Determine the water level.

Then, when the water surface of the hot water has reached the level where the hot water has been filled,
Water pressure (P-PQ) corresponding to the water head difference between the water outlet (29) of the hot water filling circuit (17) open in the bathtub (2) and the water surface.
) reaches a preset hot water filling completion value, a signal from the water pressure gauge (34) that detects this stops the appliance operation. This completes the hot water filling operation.

However, the above-mentioned method has a problem in that the water level tends to deviate from the proper position when the water is completely filled, making it difficult to fill the water accurately.

This is because in the above case, it is difficult to accurately detect the reference water pressure (po).

That is, in the above case, as shown in FIG.

The spout (
29) is oriented horizontally, the reference water pressure (P
0), when the on-off valve (4) is closed and the flow path between this and the water spout (28) is filled with water, water flows from the water spout (2S) facing in the horizontal direction. Air enters the channel, and water in the L channel replaces the intruding air into the bathtub (2).
It gradually leaks inside.

If the horizontal piping section (L) following the L flow side of the water outlet (29) is short, the water filling the horizontal piping section (L) will leak relatively quickly into the bathtub (2). Therefore, when reading the standard water pressure (P0) in which the control device built into the equipment reads the water pressure detected by the water pressure gauge (34), the vertical piping that connects from the horizontal piping section (L) to the water pressure gauge (34) on the upstream side thereof. Water has begun to drain up to part (51).

and - a vertical piping section (5) connected to the water pressure gauge (34);
Water started to drain until 1). The water pressure detected by the water pressure gauge (34) later is determined by the water pressure at the water outlet (17) at the tip of the hot water filling circuit (17).
The water pressure detected by the water pressure gauge (34) when the water is full to 29) does not match the appropriate reference water pressure (P0). Therefore, the water pressure determined using this incorrect reference water pressure (P0) Naturally, the fully tensioned state also lacks accuracy.

From this, even if you decide that hot water filling is complete and stop the hot water filling operation, the actual water level in the bathtub (2) will deviate from the appropriate water level, and hot water will not be filled accurately. It is not.

[Technical Problem] The present invention is characterized by a hot water filling circuit (17) connected to the side wall of the bathtub (2), an on-off valve (4) inserted into the hot water filling circuit (17), and a valve on the downstream side thereof. A water pressure gauge (34) is provided, and the water that starts flowing into the hot water filling circuit (17) at the beginning of the hot water filling operation is discharged from the downstream end of the hot water filling circuit that opens into the above-mentioned on-off valve (4) and the bathtub (2). When the water inlet (29) is filled with water, the on-off valve (4) is closed, and after the valve is closed, a water pressure gauge (34) is installed.
Equipped with an automatic hot water filling function that determines when hot water filling is complete based on the difference between the standard water pressure (P0) detected by the water pressure meter (P0) and the water pressure detected by the water pressure gauge (34) at the time of hot water filling and stops the hot water filling operation. Accurate hot water that does not deviate from the appropriate water level when filling the bath pot 1! The technical problem is to be able to accurately measure the reference water pressure (P0) in order to perform the surface measurement.

[Means] The technical means of the present invention for solving the above problem is as follows: ``The tip of the hot water filling circuit (17) is made to protrude into the bathtub (2), and the tip of the hot water filling circuit (17) is is bent upward to form a rising portion (49).''

[Operation] According to the above technical means, the tip of the hot water filling circuit (17) is bent upward in the bathtub (2) to form a rising portion (49).

Therefore, when the on-off valve (4) inserted into the hot water filling circuit (17) is closed and water is filled up to the rising portion (43) at the downstream end, the air, which is much lighter than water, will move to the rising portion filled with water. (49) The above-mentioned filled water does not enter the bath #f! (2) There will be no leakage inside.

Therefore, if there is no leakage, the reference water pressure (P0) that is measured by the water pressure gauge (30) for the charged water will also be accurate.

Thereafter, using the accurately measured reference water pressure (P0), the hot water filling operation is performed in the same manner as that shown in FIG. 5 described above.

[effect] The present invention has the following unique effects.

Since the reference water pressure (P0) can be measured accurately, the time of completion of hot water filling determined using the reference water pressure (P0) is also accurate, and the water level in the bathtub (2) when the hot water filling operation is completed. will not deviate from its proper position, allowing for accurate filling of hot water.

[Example] Next, the embodiments of the present invention described above will be described in detail with reference to the drawings.

The embodiment shown in FIG. 1 is an example in which the present invention is applied to a bathtub equipped with a forced circulation reheating circuit.

The reheating circuit (3) formed to circulate between the bathtub (2) and the bath heat exchanger (30) includes a heating circuit located upstream of the bath heat exchanger (30). Switching valve (37)
A circulation pump (P) is inserted.

Further, the upper and lower flow passages of both the switching valve (37) and the circulation pump (P) are connected by a communication passage (33), and a water pressure gauge (30 and its Upstream on-off valve (
4) is provided. Further, in this embodiment, a valve (41) is provided in the flow path leading from the downstream end of the communication flow path (33) to the switching valve (37) inserted into the reheating circuit (3).

On the other hand, in the hot water supply circuit (15) formed on the downstream side of the hot water supply heat exchanger (13), a hot water filling valve (11) and a backflow prevention system 21 (12) are installed in this order from the downstream side. The downstream end of the hot water supply circuit (15) is connected to the switching valve (37) inserted into the above-mentioned reheating circuit (3). Then, when the switching valve (37) is switched, the switching valve (37) 4 circulation pump (P) → flow path connecting to the bathtub (2) and the bathtub (2) → switching valve (37) → circulation pump C
P) Kamikaze heat exchanger (30) → reheating circuit (3) connected to the bathtub (2) can be opened alternatively.

In this embodiment, the downstream flow path of the circulation pump (P) when filling hot water is the hot water filling circuit (which connects the circulation pump (P) → the communication flow path (33) → the bathtub (2)). 17
), circulation pump (P) - bath heat exchanger (30) -> auxiliary hot water filling circuit (19) that connects to the bathtub (2), and the wood that flows during hot water filling described later is this hot water filling circuit (
17) and the auxiliary hot water filling circuit (18), the hot water is supplied to the bathtub (2) side. Furthermore, the flow path (18) that connects the downstream end of the connecting flow path (33) constituting the hot water filling circuit (17) to the bathtub (2) is connected to the hot water filling circuit (17) and the reheating circuit (3). The shared flow path (18) serves as a part of the reheating circuit (3) during reheating and a part of the hot water filling circuit (17) during reheating. It is designed to be configured.

Furthermore, the downstream end of the hot water filling circuit (17) described above is connected to the bathtub (
2), and the vicinity of the tip of the protrusion is bent upward to form a rising part (49), and the opening (88) located at the end of the rising part (4S) is It is facing upward. And - the opening part (
68) corresponds to the spout (29) described in the technical means section.

The detailed structure of the vicinity of the opening (68) constituting the spout (29) is shown in Figure 3, and the bathtub (2)
A piping fitting (59) is inserted into a through hole (6S) bored in the side wall of the pipe. The piping fitting (59) is a water discharge pipe (49).
), and a suction and discharge water W (38) that constitutes the upstream end of the reheating circuit (3) when reheating and the downstream end of the hot water filling circuit (17) when filling the hot water, and the piping. The tightening screwed onto the outer periphery of the rear end of the metal fitting (59) is loose) (5
8) and the flat fIN (57) sandwich the side wall of the bathtub (2).

When the flat cylinder (57) is attached, L2
The tip of the suction and discharge water pipe (3 days) protrudes further forward from the through hole (5B) bored in the center of the flat cylinder (57), and the protruding tip has an L-shape. pipe(
55) are screwed together and installed.1. The above-described rising portion (4B) is formed by the vertically rising portion of the L-shaped pipe (55). Further, the opening (68) located at the tip of the curvilinear pipe (55) faces upward.

Further, an opening (53) is formed in the lower side wall of the flat cylinder (57) for pouring water into the bathtub, and
The outer periphery of the cross-shaped pipe (55) protruding from the center of the flat cylinder (57) into the bathtub is covered with a cover (52) having a wire mesh (54).

When detecting the reference water pressure (P0), which will be described later, the opening (68) constituting the water spout (29) → the water intake and discharge pipe (3)
B) → The flow path connected to the water pressure gauge (34) mentioned above is filled with hot water, and the reference water pressure (P0) is measured based on the height difference between the opening (68) and the water pressure gauge (34). That's what I do.

In this device, the instrument operation is controlled by a control device such as a microcomputer, and the instrument control operation will be explained according to the flowchart in FIG.

(2) First, flag F, which is used to determine whether or not this is the first hot water filling operation after installing the appliance, is set to "0".

01 Next, wait for the hot water filling reswitch (not shown) to be turned on (see reference numeral (90) in the drawing).

■When the hot water filling switch is turned on, the flag F is set to ``0''.
'', that is, whether or not this is the first hot water filling operation after installing the appliance. If the flag F is "0" and it is determined that this is the first hot water filling operation after installing the appliance, the flag F is set to "1" and the on-off valve (4) is opened. ) (drawing numbers (91), (92)
reference).

(40 Next, the subroutine (93) described on the left side of Figure @2 is executed, and the switching valve (37) is switched to the hot water filling state where the hot water supply circuit (15) is connected to the circulation pump (P) side ( (solid line in Figure 1).

At the same time, the hot water filling valve (11) is opened and the circulation pump (P) is operated.

As a result, the hot water supplied from the hot water supply circuit (15) is transferred from the switching valve (37) to the circulation pump (P) to the communication flow path (3).
3) → Hot water filling circuit (17) that connects to the bathtub (2) mountain pass, and auxiliary hot water filling circuit (19) that connects from the circulation pump (P) to the bathtub (2) via the bath heat exchanger (30) The water begins to be supplied to the bathtub (2) through the .

(Yu) When the execution of the above subroutine (93) is completed, the first waiting time (TI) required for the flow path connecting from the on-off valve (4) to the bathtub (2) to be filled with hot water has elapsed. After that, the on-off valve (4) which was in the open state is closed. Therefore, in this state, the opening (88) located at the downstream end of the on-off valve (4) (in this case, the water spout ( 2
9) is filled with hot water. Then, after closing the on-off valve (0) so that the pressure of the circulation pump (P) does not apply to the water pressure gauge (30), the water pressure read from the water pressure gauge (34) is transferred to the microcontroller that constitutes the control device. This is stored in a specific memory in the computer and used as the reference water pressure (P0) (see drawing numbers (i34) and (95)).

This reference water pressure (P0) is determined by the difference in height between the opening (68) that functions as the water outlet (29) of the hot water filling circuit (17) and the water pressure gauge (34), the atmospheric pressure as Pz, and the density as Pz. 92 If the acceleration of gravity is g, the standard water pressure (P0) = Pz-p
It becomes gh. The on-off valve (4) is in a closed state.
In the above state in which the flow path from the water outlet to the water outlet (29) is filled with water, the portion up to the rising portion (49) formed by the L-shaped pipe (55) is filled with water. Therefore, air with an extremely small specific gravity does not enter downward into the water that accumulates in the vertically standing L-marked section (49), and the air that fills the above-mentioned tension circuit (17) does not penetrate downward. leakage into the bathtub (2) is completely prevented.

9) Next, open the on-off valve (4) again and close the on-off valve (4).
and a hot water filling circuit (17) that connects to the bathtub (2).

The hot water filling operation proceeds using two wave paths from the bath heat exchanger (30) side to the auxiliary 7μ filling circuit (19) connected to the bathtub (2). Then, after waiting for the second waiting time (T2) to elapse, the on-off valve (4) is closed, and then '4:
The pressure of the t1 ring pump (P) is not applied to the water pressure gauge (34), and in this state, the detected water pressure of the water pressure gauge (34) is determined. If the water pressure detected by the water pressure gauge (34) does not exceed the preset water pressure at the time of completion of filling, that is, the water pressure corresponds to the difference in head between the spout (28) and the water level at completion of filling. If the water pressure detected by the water pressure gauge (34) is lower than i1, which is the addition of the reference water pressure (P0) described above, (i
'! If the filling completion level has not been reached), the opening/closing valve (4) is opened again to proceed with the filling operation using the two flow paths. On the other hand, if the water pressure detected by the water pressure gauge (34) reaches the above value and the water filling is completed, the circulation pump (P) is stopped and the water filling valve (11) is closed to perform the water filling operation. (see drawing numbers (8B) to (100)).

Next, a case will be described in which the hot water filling operation is the second or subsequent hot water filling operation after the appliance is installed.

When determining the value of flag F immediately after turning on the hot water filling switch (at step number (91) in the drawing), if the value of flag F is "1" and the hot water filling operation is not performed for the second time or later. If it is confirmed that the above standard water pressure (
The hot water filling valve (11
) is executed, and a subroutine (83) is executed.
By using the reference water pressure (P0) detected during the first water filling operation and written into a specific memory, the steps following the drawing number (96), that is, the steps following the above "■" are executed. be done.

In addition, when reheating the bath pot of the above embodiment, the switching valve (37) is switched from the hot water filling state to set the reheating circuit (3) to the established reheating state, and in this state. Circulation pump CP) drive and reheating gas burner (31
It is sufficient to perform the combustion operation in 3).

In the case of the above example, by checking the elapse of the waiting time (T1), water is filled in the flow path connecting from the on-off valve (4) inserted in the communication flow path (33) to the bathtub (2). However, the water flow counter (l0) that measures the amount of hot water supplied from the hot water supply circuit (15) determines whether or not the flow path is filled with water.
You can also do it.

Even if the bath heat exchanger (30) side auxiliary hot water filling circuit (
18) was made to allow hot water to flow through it, but a solenoid valve was inserted adjacent to the upstream side of the bath heat exchanger (30), and when the reference water pressure (P0) was detected, water only flowed to the communication flow path (33). may be allowed to flow.

Further, in the above embodiment, the present invention was applied to a forced circulation type bathtub, but the present invention also provides a method for pumping boiling water into the bathtub (2) when the bathing water cools down. Needless to say, it can also be applied to a so-called high-temperature dip-type bath that raises the temperature of water.In this case, as shown in Fig. 4, an on-off valve (
4) and the water pressure gauge (34) downstream thereof,
The tip of the hot water filling circuit (17) may be made to protrude into the bathtub (2) and the protrusion may be bent upward.

In addition, in the above embodiment, the circulation pump (P) and the bath 4,
By directly connecting the heat exchanger (30) for simple explanation of the drawings, Fig. 1 is a piping diagram of the embodiment of the present invention, Fig. 2
Figure 3 shows the water outlet (28
), and FIG. 4 is an explanatory diagram of the second embodiment.

FIG. 5 is an explanatory diagram of the prior art, and in the figure (15)...
Hot water supply circuit (2) - Bathtub (3) - Reheating circuit (4) Fist - On-off valve (30) - Bath heat exchanger (33) Umbrella - Communication channel (34) -・・Water pressure gauge (P0) dispute ・・Standard water pressure

Claims (1)

[Claims] Hot water filling circuit (17) connected to the side wall of the bathtub (2)
And the on-off valve (4) inserted into this hot water filling circuit (17)
and a water pressure gauge (34) on the downstream side of the water pressure gauge (34), so that the water filling circuit (17) at the beginning of the filling operation releases the water into the on-off valve (4) and the bathtub (2). When the space between the water spout (2e) at the downstream end of the circuit is filled with water, the on-off valve (4)
), and after the valve is closed, the reference water pressure (P0) detected by the water pressure gauge (34) and the water pressure gauge (34) at the time of completion of filling the water.
4) In a bathtub equipped with an automatic hot water filling function that determines the completion point of hot water filling from the difference in water pressure detected and stops the hot water filling operation, the tip of the hot water filling circuit (17) is connected to the bathtub ( 2) A bathtub equipped with a hot water filling function in which a rising portion (49) is formed by projecting inward and bending the vicinity of the tip of the hot water filling circuit (17) upward.