JPH03160271A - Bathtub hot water additional heating device - Google Patents

Abstract

PURPOSE:To prevent the overflow of hot water or water in a bathtub by driving a circulation pump and detecting the overflow of water with a flow switch when water is in said bathtub and controlling the water supply to the bathtub from a hot water supply heat exchanger with a control device. CONSTITUTION:When a hot water injection switch 50A is cast, a microcomputer 49 switches over a three way valve 35 so as to drive a circulation pump 36. When water is present in a bath tub 45 from the beginning, an additional heating flow switch FS is turned on. As a result, the microcomputer 49 halts the circulation pump 36 and forces an indicator 56 to indicate the level of remaining water, and halts the water supply to the bathtub 45 simultaneously. When the hot water injection switch 50A is cast, the three way valve 35 is switched over to an additional heating state, and the circulation pump 36 is arranged to operate. At the same time, if an attempt is made to confirm that the additional heating flow switch FS remains in an off state, then, hot water is supplied to the bathtub 45. This construction makes it possible to supply hot water and prevent the over flow of water in the bathtub 45 even when water is present in the bathtub 45.

Description

[Detailed description of the invention] (A) Industrial application field This invention supplies hot water from a hot water supply heat exchanger to a bathtub, and circulates the hot water in the bathtub to a reheating heat exchanger to heat the bathtub. The present invention relates to a bathtub hot water reheating device.

(Explanation) Conventional technology This type of bathtub hot water supply system is known, for example, from Japanese Patent Application Laid-open No. 60-16
As disclosed in Publication No. 4164, a predetermined amount of hot water at a predetermined temperature from a hot water supply heat exchanger is supplied to a bathtub, and the hot water in the bathtub is circulated to a reheating heat exchanger so that it can be kept at a predetermined temperature. ing.

(C) Problems to be Solved by the Invention By the way, in the conventional device described above, when a predetermined amount of water is supplied from the hot water supply heat exchanger to the bathtub while water remains in the bathtub, water overflows from the bathtub. I was worried. So,
In the method disclosed in Japanese Utility Model Application Publication No. 62-156753, a water level switch is provided in the bathtub, and when the water level switch detects water in the bathtub, water is not supplied from the hot water heat exchanger to the bathtub. I have to. However, in this system, a circulation circuit including a circulation pump connects the indoor bathtub and the heat exchanger for reheating the outdoor heat source device, and when heating the water in the bathtub, the water level switch of the bathtub and the heat source are connected. This has the disadvantage that it requires electrical wiring to be connected to the control device of the device, making installation work complicated.

This invention was made in view of the above facts,
To make it possible to restrict water supply from a hot water supply heat exchanger to a bathtub when there is water in the bathtub without providing a water level switch in the bathtub.

(2) Means for Solving the Problems This invention includes a heat source device having a hot water supply heat exchanger and a reheating heat exchanger, and a hot water supply device having a solenoid valve and connecting the hot water supply heat exchanger and the bathtub. It has a circuit, a circulation pump, and a flow switch, and has a circulation circuit that connects the bathtub and the reheating heat exchanger, and an operation means, and when the operation means is operated, the circulation bomb is operated, and the flow switch causes the water to flow. This configuration includes a control device that opens a solenoid valve to supply a predetermined amount of hot water or water to the bathtub when the flow switch does not detect running water, and limits the water supply to the bathtub when the flow switch detects running water.

(E) Effect If there is water in the bathtub, the flow switch detects running water when the circulation bomb is operated, so the control device restricts the water supply from the hot water heat exchanger to the bathtub, Moreover, since the flow switch can be provided in the circulation circuit on the heat source device side, there is no need to connect the bathtub and the heat source device with wiring.

(to) Example Hereinafter, embodiments of the present invention shown in the drawings will be described.

FIG. 1 shows a bathtub hot water reheating device according to an embodiment of the present invention. In FIG. 1, (1) is a heat source device, (2
〉 is a heat exchanger for hot water supply, (3) is a heat exchanger for reheating, <4)
(5) is a burner that heats these heat exchangers (2) and (3), (6) is a burner fan that supplies combustion air to burners (4) and (5), and (7) is a burner fan (6) A damper is installed in the ventilation path (8) of the burner (4) to adjust the amount of air to the burner (4) appropriately by regulating the amount of air to the burner (4). The original solenoid valves (11 and 12) installed in the pipe (9) are gas branch pipes (1) that supply gas fuel to the burners (4) and (5), respectively.
3) (14) is the main solenoid valve and proportional control valve provided in the gas branch pipe <11>, (15) and (16) are the main solenoid valve and proportional control valve provided in the gas branch pipe (11).
2> The bath shut-off valve and the bath gas governor, (
17) is a water supply pipe that is connected to the water pipe (19) via a connection member (18) with a drainage valve and supplies water to the hot water heat exchanger (2), and (20) 4 is installed in the water supply pipe (19). The flow switch for hot water supply (21) is the heat exchanger for hot water supply (2
) is the hot water supply pipe connected to the outlet of the hot water supply branch pipe (2
2) (23>).(24A) and (24A) and (23>).
24B) is a high-limit thermostat installed in the hot water supply heat exchanger (2) and the reheating heat exchanger (3), respectively.
5) is connected to the hot water supply branch pipe (23) via a connecting member (26) with a drain valve, and has a faucet (27) at the end thereof; (28) and (29) are hot water supply branch pipes (22). The solenoid valve and hopper mechanism installed in the hopper, (30〉 is the hopper, (31〉 is the float switch installed in the hopper (30〉), and (32) is the bar flow connected to the top of the hopper (30) pipes, (33) and (34) are the reheating outgoing pipe and refiring return pipe connected to the reheating heat exchanger <3), (35) and (36) are the reheating outgoing pipe (33). The three-way valve and circulation pump (FS) are equipped with a return pipe for reheating (3
4) is a circulation flow switch installed, (37) is a connecting pipe that connects the bottom of the hopper (30) and the three-way valve (35>), and (38) has one end connected to the drain hole of the circulation pump (36). and the other end is connected to the connecting member (39), and (40) is an on-off valve attached to the drain pipe (38), which is connected to the reheating outgoing pipe (33) and the reheating return pipe (33). The pipe (34) is connected to the adapter (46) of the bathtub (45) via the connecting members (41, 42) and external piping (43, 44).
) (26) (39) (41) (42) are all heat source devices (
1), and a hollow bar flow pipe (32) is also led out under the heat source device (1).
is a flow rate detector installed in the hot water supply branch pipe (22), (48
) is the hot water temperature detector installed in the reheating return pipe (34〉), (
S) is a control device.

As shown in Fig. 2, the control device (S) has a microcomputer (hereinafter referred to as microcomputer) (49), and on the input side of the microcomputer (49) are a hot water pouring switch (50A) and a hot-burning switch (50B). , temperature setting device (51A) (51B
), hot water setting device (52), hot water flow switch (20
), high limit switch (24A) (24B>, flow switch for reheating (FS), float switch (31)
, a flow rate detector (47), and a hot water temperature detector (48).Furthermore, a burner fan (6), a damper (7), and a solenoid valve (10) are installed on the output side of the microcomputer (49). ,
A burner control circuit (53) that drives the main solenoid valve (13), bath stop valve (15), and proportional control valve (14), and a hot water supply control circuit that drives the solenoid valve (28) and three-way valve (35). (54), a bomb control circuit (55) for starting and stopping the circulation pump (36), and a display (56).

Next, the operation of the above-described embodiment device will be explained.

When the faucet (27) is opened, the microcomputer of the control device (S)
9) checks the flow of water in the water supply pipe (17) based on the signal from the hot water supply flow switch (20), and turns on the burner control circuit (5).
3) to perform combustion in the burner (4>).In addition, the temperature detected by the sensors (not shown) installed on the inlet and outlet sides of the hot water heat exchanger (2>) and the temperature setting device (51A Based on the set temperature TA determined by ).In this way, the amount of combustion in the hot water supply heat exchanger (2) is controlled.
) The hot water heated to approximately the set temperature is sent to the usage section via the hot water supply pipe (21), the hot water supply branch pipe (23), and the hot water supply outer pipe (25).

When the pouring switch (50A) is turned on, the microcomputer (4
9>, as shown in FIG. 3, switches the three-way valve (35) in the direction of the dashed arrow to operate the circulation bomb (36).

If there is no water in the bathtub (45), water will not flow into the reheating outflow pipe (34) and the reheating flow switch (FS) will remain disabled, so the microcomputer (49) will switch on the solenoid valve (28). > is opened, the three-way valve (35) is switched in the direction of the solid arrow, and the burner (4) is operated in the same way as when hot water is supplied from the faucet (27). The hot water heated to almost the set temperature is distributed to the hot water pipe (21), the hot water supply branch pipe (22), the hopper (30), the connecting pipe (37), the three-way valve (35), the reheating outgoing pipe (33), and the outside. Piping (4
3>, water is supplied to the bathtub (45). When the microcomputer (49) confirms that a predetermined amount of hot water (set by the hot water amount setting device (52)) is supplied based on the signal from the flow rate detector (47), the solenoid valve (28) closes and the burner (4) and The circulation bomb (36>) stops. On the other hand, if there is water in the bathtub (45>) from the beginning, the reheating flow switch (FS") is turned on, so the microcontroller <49> stops the circulation bomb (36).
The display (56) will display the remaining amount, and water will not be supplied to the bathtub (4S).
When the reheat switch (50B) is turned on, the microcomputer (4
9) switches the three-way valve (35) in the direction of the dashed arrow to operate the circulation bomb (36). Then, when the reheating flow switch (FS) is activated, the microcomputer (49) operates the burner (5). Therefore, water in the bathtub (45) is circulated to the reheating heat exchanger (3) and heated. Such reheating operation continues until the temperature detected by the hot water temperature detector (48) reaches the temperature set by the temperature setting device (51B). According to this embodiment, when the pouring switch (50A) is turned on, the three-way valve (35) is switched to the state at the time of forced heating, the circulation pump (36) is operated, and the flow switch for forced heating (FS ) remains off, then hot water is supplied to the bathtub (45), so hot water is supplied even though there is water in the bathtub (45〉), and the bathtub (45〉) is still turned off.
45) can prevent water from overflowing. Moreover, the bathtub (
Since the presence or absence of water in the bathtub (45) is detected by the circulation circuit in the heat source device (1) without installing a water level sensor in the bathtub (45), the heat source device (1) and the bathtub (45) can be connected by electrical wiring. There is no need to do this, and the installation work can be done easily.

(g) Effects of the invention Since this invention is constructed as described above, when there is water in the bathtub, a predetermined amount of hot water or water is supplied from the hot water supply heat exchanger to the bathtub, and the water in the bathtub does not overflow. Not only can water be prevented from coming out, but the presence or absence of water in the bathtub can be detected by the shield ring circuit on the heat source device side, and the installation work can be simplified by eliminating electrical wiring between the heat source device and the bathtub.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a bathtub hot water reheating device showing an embodiment of the present invention, FIG. 2 is a block diagram of a control device, and FIG. 3 is a flowchart for explaining the operation of the control device. (1>... Heat source device, (2>... Heat exchanger for hot water supply, (3>... Heat exchanger for reheating, (28)... Solenoid valve, (36)... Circulation Bomb, (50A)...
Pouring switch (operation means), (FS)...flow switch for reheating, (S)...control device.

Claims (1)

[Claims] (1) A heat source device having a hot water supply heat exchanger and a reheating heat exchanger, a hot water supply circuit having a solenoid valve and connecting the hot water supply heat exchanger and the bathtub, a circulation pump and a flow switch. , has a circulation circuit that connects the bathtub and the reheating heat exchanger, and an operating means, and when the operating means is operated, the circulation pump is operated, and when the flow switch does not detect running water, the solenoid valve is opened. A bathtub hot water reheating device characterized by comprising a control device that supplies a fixed amount of hot water or water to the bathtub and limits the water supply to the bathtub when a flow switch detects running water.