JPH03156249A - Hot water feeding device - Google Patents

Abstract

PURPOSE:To enable a remained water to be detected even if its volume is low and to enable an efficient hot water feeding operation to be carried out by a method wherein a releasing bath water sensing circuit is formed at the bottom part of a bath tub and a bath water sensing means is arranged in the sensing circuit. CONSTITUTION:Since a passage 21 is communicated and connected to the bottom wall of a bath tub 2, a remain water in the bath tub 2 if a little bit of water remains there is sucked by a circulation pump P and circulated in an additional firing circuit 3. A water flow switch 31 is turned ON and the presence of remained water can be judged. In the event that the remained water is present, the circulation pump P is stopped, a changing-over valve 25 is changed over to cause the additional firing circuit 3 to be shielded. In addition, a hot water feeding valve 11 is opened to supply hot water to the hot water feeding valve 11, a passage 22 and the bath tub 2 so as to start a hot water feeding operation. The hot water feeding operation is promoted while a water level in the bath tub 2 is being checked by a water level meter 34 arranged in the passage 21. When the water level in the bath tub 2 reaches a target water level and a hot water feeding completion signal is outputted from the water level meter 34, the hot water feeding level 11 is closed with a signal and then the hot water feeding operation is stopped.

Description

[Detailed Description of the Invention] [Industrial Application Field and Summary of the Invention] The present invention relates to a hot water filling device, and even when a small amount of water is present in a bathtub, the presence or absence of the small amount of water can be detected. This makes it possible to perform an appropriate and efficient thirst operation.

[Prior Art and Problems] For example, there is a hot water filling device shown in FIG. 4 that supplies hot water to a bathtub and performs a filling operation.

The reheating circuit (3) is formed to return from the side wall of the bathtub (2) to the reheating heat exchanger (30) and back to the side wall of the bathtub (2). 30), a three-way valve (37) and a circulation pump (p).
, a water pressure gauge (34), and a water flow switch (31) are inserted in this order from the upstream side.

In addition, the hot water supply circuit (15) drawn out downstream from the hot water heat exchanger (13) of the appliance body (1) is connected to the three-way valve (37) inserted into the above-mentioned reheating circuit (3). Continued. Then, when the three-way valve (37) is switched, the first circuit (60) connected to the hot water supply circuit (15) → three-way valve (37) → circulation pump (P) → bathtub (2) and the hot water supply circuit (15
) to the bathtub (2) directly via the three-way valve (37), and further from the bathtub (2) to the three-way valve (3
7) and the bath 4f again via the circulation pump (ρ)! The reheating circuit (3) which returns to (2) can be opened alternatively. In addition, in the following, the hot water supply heat exchanger (the hot water supply circuit (15) drawn out from the hot water tank 13), the three-way valve (37), the second circuit (61), and the circuit connected to the bathtub (2) are connected to the hot water filling circuit (13). !7).

With this one, when you turn on the hot water filling switch (50),
First, determine whether there is residual water in the bathtub (2),
''-2 An operation is performed to determine whether the turning on of the hot water filling switch (50) is an operation intended to replenish hot water to the bathtub (2) or an operation intended to fill hot water from the beginning. That is,
The three-way valve (37) is maintained in the state shown by the solid line in the figure to establish the reheating circuit (3), and the circulation pump (P) is operated 1 ON at a certain time. At this time, the water flow switch (31) is turned on and the bathtub (2) is turned on.
), it is determined that the turning on of the hot water filling switch (50) is an operation intended to replenish bathing water. Also, when the water flow switch (31) is turned on (when the water in the bathtub circulates in the reheating circuit (3)), the water pressure gauge (34) → water flow switch [31
)→Since the first circuit (60) connected to the bathtub (2) is filled with water, the water pressure in the bathtub can be detected by the water pressure gauge (34) via the circuit. After that, the three-way valve (37
), and hot water is supplied to the bathtub (2) while determining the water level in the bathtub based on the water pressure in the bathtub detected by the water pressure gauge (30) to proceed with the hot water replenishment operation.

On the other hand, when the water filling switch (50) is turned on to operate the circulation pump (P), the water flow switch (31) is turned on.
If it is detected that there is no residual water in the bathtub (2) while it is in the FF state, the operation of the hot water refill switch (50) is not intended to refill the bath water, but to fill the bath water from the beginning. It determines that it is a thing and takes the corresponding action. That is, the three-way valve (37) is switched to open the hot water supply circuit (1).
5) connects the circulation pump (P) to the bathtub (2), fills the connected channel with water and bleeds air from the channel. After that, by turning off the three-way valve (37) again, the hot water filling circuit (17) is established, and in this state, the water pressure gauge in the above flow path where air is removed while filling hot water is set. (At step 30, the water filling operation proceeds while monitoring the water level in the bathtub.

Further, when a reheating switch (not shown) is turned on, the water in the bathtub is forcibly circulated and reheated within the reheating circuit (3).

However, in the above conventional system, when the water level in the bathtub is lower than the upstream end opening (32) of the reheating circuit (3) that opens on the side wall of the bathtub (2), the hot water filling switch (50) is operated. When trying to circulate the water in the bathtub in the reheating circuit (3), the bath water will not circulate in the reheating circuit (3). That is, if there is residual water in the bathtub at a level lower than the opening (32), there is a problem in that it is not possible to detect the presence or absence of the residual water.

In addition, in the above-mentioned conventional type, when the water flow switch (31) is turned on,
・Water in the bathtub is detected when the water is turned OFF, but the water flow switch (31) does not necessarily need to be provided, and the water pressure in the bathtub detected by the water pressure gauge (30) is used to determine the presence or absence of residual water and the amount of water. Also in this case, as mentioned above, when the amount of residual water in the bathtub (2) is extremely small, the presence or absence of this cannot be detected.

The present invention has been made in view of the above points, and includes a hot water filling circuit (17) piped from the r appliance body (1) to the bathtub (2).
A bathing water detection means such as a water flow switch or a water pressure gauge is provided to detect residual water in the bathtub (2), and the output of the bathing water detection means is applied to the appliance body (1) to control hot water filling. The object of the present invention is to enable a hot water filling device to detect even a small amount of residual water in a bathtub (2), thereby enabling efficient lagoon filling work.

[Level L] The technical means of the present invention to solve the above problem is to form a bathing water detection circuit that is open to the bottom of the bathtub (2), and to arrange a bathing water detection means in the circuit. It is.

[Effect] The above technical means works as follows.

The bathing water detection means for detecting residual water in the bathtub (2) is installed in the bathing water detection circuit that opens to the bottom of the bathtub (2), so even if there is a small amount of water remaining in the bathtub (2), If the residual water is present, the residual water is detected by the bathing water detection means disposed in the path 8 via the residual water detection circuit from the open part located in the above-mentioned space.

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

Bath 4F! (2) Even if the amount of residual water is extremely small, it can be detected. The detection accuracy is improving.

[Examples] Next, embodiments of the present invention marked P will be described with reference to the drawings.

As shown in Fig. 1, the Jk'T of the reheating heat exchanger (30) heated by the reheating burner (38) and the bathtub (2).
The outgoing path (2) of the reheating circuit (3) is formed to circulate in the
1), a water flow switch (31), a water pressure gauge (34), and a 4-ring pump (P) are inserted in this order from the upstream side. Moreover, the outgoing path (2) of the reheating circuit (3)
1) and the return path (22) on the bathtub (2) side are connected to the bathtub (2).
) is opened in the recessed part (41) formed at the bottom of the return path (2
The discharge port (24) of 2) is located in the body of the concave portion (41),
The inflow ports (23) of the outgoing path (21) open at the bottoms of the recesses (41). And a heat exchanger for reheating (30
) and a circulation pump (P) 't5t.
1), a cutoff valve (25) is disposed on the downstream side of the circulation pump (P) in the outgoing path (21), and the cutoff valve (25)
A drain pipe (26) branched from the bottom wall of the appliance body (1) and equipped with an automatic drain valve (29) drains water 1 (
B). In addition, a hot water supply circuit (75) drawn from the hot water heat exchanger (13) heated by the hot water burner (18) is connected to the downstream side of the reheating heat exchanger (30). There is a hot water filling valve (11) in the hot water supply circuit (75).
is inserted.

The details of the recessed part (41) are as shown in FIG. 2, and a drainage port (33
) opens and the drain plug (42) is pulled out! ! It is possible to fit in. The drain port (33) opens at the center of the bottom of the recessed portion (41), and the inlet port (23) opens at the outer periphery thereof. Inside the recessed part (41), there is a certain distance (
A cylindrical body (40) having a discharge port (2
The hot water discharged from the bathtub (2) passes through the interval (C).
) is discharged.

A filter (36) is provided at the E end of the cylinder (44).
) is crowned from the L direction, and a drain plug (42) is attached to the tip of a 4ih (47) that protrudes from the center of the filter (3B) in the f direction. The length of the shaft (47) is set to a predetermined length, so that when the drain plug (42) closes the drain port (33), the filter (3B) is attached to the outer periphery of the upper end of the cylindrical body (44). The flange portion (35) extends substantially into contact with the flange portion (35). Although this filter (36) is a metal disk having a large number of through holes as shown in the figure, it may also be a synthetic resin plate or sheet made of a porous material.

When performing hot water filling work in the hot water filling apparatus of the above embodiment, it is sufficient to turn on the hot water filling switch (50) disposed on the bathroom wall.

When the hot water filling switch (50) is turned on, it operates in the same manner as the conventional one described above, and first, the task of determining the presence or absence of residual water in the bathtub (2) begins.

That is, the auxiliary valve (43) inserted in the return path (22) of the reheating circuit (3) is opened and the vJFf valve (25) is maintained in the state shown in Fig. 1 to establish the reheating circuit (3). In this state, the circulation pump (P) is driven.

Then, since the outward path (21) is connected to the bottom wall of the bathtub (2) as described above, if there is any residual water in the bathtub (2), the residual water will flow through the circulation pump ( P) and circulates within the reheating circuit (3),
As a result, the water flow switch (31) is turned on and the presence of the residual water can be determined.

If l2 residual water is present, a circulation pump (
At the same time as stopping the switching valve (25), the reheating circuit (3) is cut off, and then the hot water filling valve (11) is stopped.
), thereby opening the hot water tank Jr (II) → return trip (
22) → Supply hot water to the bathtub (2) and start the hot water filling operation. During the hot water filling operation, the outward path (2
The water level in the bathtub (2) is detected by the water pressure gauge (34) installed in the bathtub (2) as the water filling operation progresses.
) When the internal water level reaches the target water level and a corresponding hot water filling completion signal is output from the water pressure gauge (34), the hot water filling valve (11) is closed by this signal to stop the hot water filling operation rh.

On the other hand, if it is determined that there is no residual water in the bathtub (2) because the water flow switch (31) remains OFF when the circulation pump (P) is driven, then the auxiliary valve inserted in the return path (22) (43) in closed position E;
1) is opened for a certain period of time, and the hot water filling valve (!1) → reheating heat exchanger (30) → vJ replacement valve (25) → circulation pump (P
)→Water pressure gauge (34)→Fill the channel that connects to the bathtub (2) with water and bleed air from the channel, and by venting the air, the water pressure gauge (30) can determine the level of the wood inside the bathtub (2). Thereafter, the switching valve (25) is switched, and the auxiliary valve (43) on the return path (22) is opened, and the hot water filling operation proceeds in the same manner as described above.

In the -1L χ example, the water flow switch (31) and water pressure gauge (34) that detect the presence or absence of water in the bathtub and its water level correspond to the bathing water detection means described in the technical means described above. In addition, the outgoing path (21) equipped with the water flow switch (31) and water pressure gauge (34) corresponds to the bathing water detection circuit equipped with the bathing water detection means described in the technical means section. .

Moreover, in the above embodiment, the outgoing path (21) of the reheating circuit (3)
The presence or absence of water in the bathtub (2) was determined by the water flow switch (31) installed in the water flow switch (31).
1) is not necessarily necessary, the water pressure gauge (34) detects the bath! The presence or absence of residual water may be determined based on the water pressure in the fJ (2). In such a case, if the installation position l of the appliance body (1) is relatively low relative to the bathtub (2), the circulation pump ( The presence or absence of residual water in the bathtub (2) and its contents can be detected without driving the bathtub (2). That is, if there is even a small amount of residual water in the bathtub (2), this water pressure will naturally be transmitted to the water pressure gauge (34) of the appliance body (1), which is located at a lower installation position t, and the water pressure gauge This allows the water level in the bathtub to be detected.

Furthermore, in the above embodiment, since the water pressure gauge (34) was arranged on the outgoing path (21) drawn out from the bottom wall of the bathtub (2),
If the bathtub (2) is filled with water under conditions where there is residual water, the water level can be immediately determined using the water pressure gauge (30). There is an advantage that the amount (volume) of water can be immediately determined during the filling operation.

In the above embodiment, when draining the water in the bathtub (2), the drain valve (42) is opened by pulling up the shaft (47). ) to establish a circuit that connects the bathtub (2) → circulation pump (P) → switching valve (25) → drain pipe (26), and in this state, open the automatic drain valve (2 days) and turn on the circulation pump (P). ), the water in the bathtub can be automatically drained from the drain pipe (26).

×, In this one, a drain pipe (26) was formed downstream of the circulation pump (P), but as shown by the imaginary line in Fig. 1,
The drain pipe (28) is connected to a circulation pump (P) and a water flow switch (
It is also possible to branch from between 31) and in such a case, ?
Automatic drain valve [2] without operating JIIEM pump (P)
9] The water in the bathtub will drain naturally just by opening it. When the hot water filling work is completed, the automatic drain valve E (29) is opened for a short period of time, and the presence or absence of residual water in the bathtub (2) is determined based on the output of the water flow switch (31).

In addition, if the installation position of the appliance body (1) with respect to the bathtub (2) is to some extent low, opening the automatic drain valve (29) will cause
Even if the circulation pump (P) is not driven at all, the bathtub (2)
On the other hand, if the appliance body (1) is located at a certain level higher than the bathtub (2), the circulation pump (ρ) and Drainage operation using a drain pipe (26) formed on the downstream side is essential.

Furthermore, in the above embodiment, the water pressure gauge (34) and water flow switch (31) were inserted in the outgoing path (21), but these were inserted in the incoming path (21).
22).

The second embodiment shown in FIG. 3 is an application of the present invention to a hot water filling device using a high-temperature hot-water heater.
13) is connected to the bottom wall of the bathtub (2). A hot water filling valve (!1) and a water pressure gauge (34) are installed in the hot water filling circuit (!7), and the presence or absence of water in the bathtub and its water level are detected by the output of the water pressure gauge (34).

In this second embodiment, the water pressure gauge (3
The output of step 4) is judged to confirm the presence or absence of residual water in bath 411 (2) and its water level. In this case, the water filling circuit (34) equipped with the water pressure gauge (34) is
17) itself constitutes the bathing water detection circuit described in the technical means section.

In addition, in the second embodiment, when automatically draining the wood in the bathtub (2), as shown by the imaginary line in Fig. 3, the water pressure gauge (34) is branched from the upstream side. Drain pipe (2
Insert the automatic drain valve (29) into B) and close this automatic drain valve (
28) can be automatically opened and closed by a control circuit built into the appliance, and the hot water filling circuit (17) can be connected to the bathtub (2).
) Pull out the manual drainage circuit (39) from the part that connects to
If a manual drain plug (not shown) is installed in this, manual drainage can be performed. In this case, there is no advantage of forming separate openings for draining water and filling the bathtub in the bathtub (2).

[Brief explanation of the drawing]

Fig. fjS1 is an explanatory diagram of the tjS1 embodiment of the present invention, Fig. 2 is a detailed explanatory diagram of the concave portion (41) formed in the substitute part of the bathtub (2), and Fig. 3 is an explanatory diagram of the second embodiment. FIG. 4 is an explanatory diagram of a conventional example, in which (1)
・Appliance body (2)...Bathtub (17)...Hot water filling circuit

Claims (1)

[Claims] [1] A hot water filling circuit (17) piped from the appliance body (1) to the bathtub (2), and a water flow switch, water pressure gauge, etc. that detects residual water in the bathtub (2). In a bath water filling device which is provided with a bath water detection means and performs hot water filling control by applying the output of the bath water detection means to the appliance main body (1), a bath water detection circuit opened to the bottom of the bathtub (2). A hot water filling device comprising: a circuit formed with a bath water sensor and a bath water detecting means disposed in the circuit. [2] The hot water filling device according to claim 1, wherein the hot water filling circuit (17) itself constitutes a bathing water detection circuit.