JP3098646B2 - 1-can 2-circuit bath water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-can, two-circuit bath water heater that heats a heat exchanger for hot water supply and a heat exchanger for bath circulation heating with the same burner.

[0002]

2. Description of the Related Art Conventionally, a heat exchanger for hot water supply and a heat exchanger for bath circulation heating are heated by the same burner, and after a bath is heated, a circulating pump is intermittently provided at predetermined temperature measurement intervals. While operating for a predetermined time to detect the bathtub water temperature,
A so-called pre-pump, which has a heat retention function configured to reheat if the detected temperature is equal to or lower than the heat retention set temperature.
There was a two-circuit bath water heater combined with a can.

[0003] As disclosed in Japanese Utility Model Publication No. 3-54365, there is a burner in which the combustion is controlled in accordance with a set temperature for hot water supply to be used during the heat keeping operation.

[0004]

However, the one-can, two-circuit bath / bath water heater of the above construction still has the following problems.

That is, if the hot water supply side is used during the pre-pump, the hot water supply heat exchange section and the bath circulation heating heat exchange section are heated by the same burner. With the operation of the heat exchanger, the temperature of the bath circulating heating was increased even though the temperature of the bath water was sufficiently high, and as a result, additional heating was sometimes performed.

On the other hand, in a two-can, two-circuit type bath / bath water heater, a large number of fins are stored in a large number of fins attached to a heat absorbing tube of a heat exchange section for bath circulation during boiling and reheating of bath water. Therefore, if the circulating pump is stopped immediately after the bathtub water temperature reaches the set temperature, the bathtub water may stay in the heat absorbing tube, and the heat of the fins may be transmitted to the staying water to cause boiling. Therefore, in order to prevent post-boiling, a so-called post pump is used in which the circulating pump is operated for a predetermined time to circulate the bath tub water to prevent the heat absorption tube from being heated after the bath water reaches a predetermined temperature. Was.

However, since the heat exchange unit for hot water supply and the heat exchange unit for bath circulation heating use different burners, the heat exchange unit for hot water supply may affect the heat exchange unit for bath circulation heating. Although it is effective because there is no, the one-can two-circuit system is configured so that the hot water supply heat exchange unit and the bath circulation heating heat exchange unit are heated by the same burner as described above. If the hot water supply side is used while performing the post pump, the heat exchange unit for the hot water supply is heated up to the heat exchange unit for bath circulation as with the pre-pump, and the temperature reaches the set temperature. , And will have to refire. Therefore, it was difficult to adopt a configuration in which a post pump is used in a bath can / bath water heater of a one-can two-circuit type.

An object of the present invention is to provide a one-can, two-circuit bath water heater that can solve the above problems.

[0009]

According to the present invention, a heat exchange unit for hot water supply and a heat exchange unit for bath circulation heating are heated by the same burner, and are intermittently operated at predetermined temperature detection intervals by a time measuring means. The temperature of the bathtub water is measured while operating the circulation pump for a predetermined time, and if the detected temperature is equal to or lower than the set temperature, a one-can-two-circuit bath / bath water heater having a heat retention function configured to reheat the water. If the temperature of the bath tub is detected to be higher than the set temperature during the warm-up operation, the circulation pump is immediately stopped, and at the same time, the timing of the next temperature measurement interval is started, starting from the time when the circulation pump is stopped. It is intended to provide a one-can, two-circuit bath water heater combined with a water heater.

[0010] Further, the present invention does not perform the operation of the circulation pump when the heat exchange unit for hot water is operating when a predetermined temperature detection interval is measured after the stop of the circulation pump, and the operation of the heat exchange unit for hot water supply is not performed. The operation of the circulation pump is stopped and the operation of the circulation pump is started to detect the temperature of the bathtub water.If the heat exchange unit for hot water supply is operated during the operation of the circulation pump for measuring the temperature of the bathtub water, the circulation is performed. It is also characterized in that the operation of the pump is immediately stopped, the operation of the heat exchange unit for hot water supply is stopped, and the operation of the circulation pump is started to detect the temperature of the bathtub water.

[0011] The present invention also provides a one-can-two-circuit type bath-cooker / hot-water supply device in which a heat exchanger for hot water supply and a heat exchanger for bath circulation heating are heated by the same burner. Except when the heat exchange unit and the heat exchange unit for bath circulation heating are operating simultaneously, after finishing the bath heating or reheating, the circulation pump is operated for a predetermined time to circulate the bath water. In addition, when the heating of the bath or the reheating is completed during the simultaneous operation, the circulation pump is immediately stopped without operating the circulation pump.

Further, according to the present invention, when the heat exchange unit for hot water supply is operated while the circulation pump is operated for a predetermined time after the completion of the heating or the additional heating, the circulation pump is stopped immediately. It is also characterized by the fact that

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the accompanying drawings.

FIG. 1 conceptually shows the overall structure of a one-can, two-circuit bath / bath water heater A according to the present invention.
Reference numeral 1 denotes a can body, which includes a hot water supply heat exchange unit a and a bath circulation heating heat exchange unit b.

The heat exchange part a for hot water supply and the heat exchange part b for bath circulation heating are constructed by mounting a number of fins 2 arranged in common to the heat absorption pipe 3 for hot water supply and the heat absorption pipe 4 for bath. ing.

In the lower part of the can 1, a heat exchange unit a for hot water supply is provided.
And a heat exchange part for bath circulation heating b are arranged in common, and a heat exchange part a for hot water supply and a heat exchange part b for bath circulation heating are heated by the same burner 5. . 7
And 8 are a solenoid valve and a proportional valve attached to the fuel supply path 6 to the burner 5, respectively, and F is a fan for sending air to the burner 5.

Further, a bath tub water inlet 4 of the heat absorbing tube 4 for a bath is provided.
a, the tub water outlet 4b is connected to a circulating flow path 10 to which a circulating pump P is attached in the middle, and the tub 9
Is in communication with 10a is an inflow circulation channel for supplying hot water from the can 1 to the bath 9; 10b is an outflow circulation channel for supplying hot water from the bath 9 to the can 1; 33 is a bath temperature detector;
Is a bath water flow switch.

On the other hand, a water supply pipe 12 is connected to the water inlet 3a of the heat absorption pipe 3 for hot water supply, and a hot water supply pipe 13 is connected to the outlet 3b. And in the middle of the hot water supply endothermic tube 3,
A boiling prevention detector 16 is provided.

A water supply side water amount detector 14 and a water supply temperature detector 15 are attached to the water supply pipe 12 from the upstream side.
A heat exchanger temperature detector 17 and a vacuum breaker 18 are attached to 13 from the tap hole 3b side.

Further, the water supply pipe 12 and the hot water supply pipe 13 are connected via a mixing valve 19 to supply hot water at an appropriate temperature by mixing water and hot water in the mixing valve 19 or to supply the hot water to the bathtub 9. be able to.

When the can 1 side of the mixing valve 19 is closed, the supplied water does not pass through the can 1 and the hot water supply pipe 13a on the downstream side of the mixing valve 19 of the hot water supply pipe 13 and Water can be directly supplied to the circulation channel 10 side. 20 is a water quantity valve, 21 is a hot water supply temperature detector.

The hot water supply pipe 13a is connected to the mixing valve 1
9. Branching at the position after the water quantity valve 20
The first branch flow path 22 further branches via a bath-side water amount detector 23, a bath-side solenoid valve 24, and a flow pressure regulating valve 25, and a second branch flow path 26 and a third branch flow A path 27 is formed.

The second branch flow path 26 and the third branch flow path
27 is connected to the outflow circulation channel 10b and the inflow circulation channel 10a of the circulation channel 10, respectively. 28 and 29 are check valves attached to the second branch flow path 26 and the third branch flow path 27, respectively.

As described above, one can 2 in this embodiment
The circuit type bath / bath water heater A has a first branch flow path 22 downstream of the mixing valve 19 and a hot water supply pipe 13 and a circulation flow path.
10 and other water faucet devices, such as a shower, etc., in addition to the bathtub 9, and the water pressure regulating valve 25 is attached to the first branch flow path 22. The hot water supply to the plug device and the bathtub 9 and the amount of hot water to be distributed to the hot water beam can be adjusted.

The second branch flow path 26 and the third branch flow path 27
So that in the case of hot water, the third branch flow path
Since hot water can be directly supplied from the outflow circulation flow path 10b into the bathtub 9 from the outflow circulation flow path 10b and from the second branch flow path 26 via the circulation pump P, the hot water can also be supplied into the bathtub 9 from the inflow circulation flow path 10a. The supply amount of hot water can be doubled, and the time for hot water can be shortened.

The one-tank, two-circuit bath / bath water heater A in the present embodiment has a heat retaining function. These controls are carried out by controlling the normal hot water supply and hot water supply as well as by the bath / bath water heater. The control is performed by the control unit 30 disposed in A.

As shown in FIG. 2, the control unit 30 comprises input / output interfaces 40, 41, a microprocessor 42, and a timer 43, and the hot water supply side water amount detector 14, which is input to the input interface 40, and the water supply temperature detector. 15. Based on a detection signal from the bath-side water amount detector 23 and the like, and an instruction signal such as a hot water temperature setting from an operation panel 35 to be described later, the solenoid valve 7, the proportional valve 8, the fan F, and the circulation pump are output from the output interface 41. A drive signal is output to P, mixing valve 19, water amount valve 20, and the like to control all functions of bath water heater A.

The above-mentioned heat retention function is performed by inputting a predetermined temperature detection interval t to a timer 43 incorporated in the control unit 30 in advance, and operating the circulation pump P intermittently for a predetermined time at each such temperature detection interval t. The bath temperature is detected by the bath temperature detector 33 while performing a so-called pre-pump, and when the temperature is lower than the set temperature by a predetermined value or more, the control unit 30 drives the circulation pump P and the heat exchanger 1 to drive. The hot water in the bathtub 9 is heated to a set temperature, that is, additional heating is performed, so that the set temperature is always maintained.

In this embodiment, in addition to the above-mentioned temperature detection interval t, the timer 43 enables the continuous use time of the hot water supply side immediately before the pre-pump to be measured, and also measures the independent interval t ₂ when using the hot water supply. I have to. The function of the timer 43 will be described later in detail.

In FIG. 1, reference numeral 35 denotes an operation panel, which is provided with switches such as a hot water temperature setting switch and a heat keeping operation switch in addition to an operation switch, and is attached to a wall or the like near the bathtub 9 and is also used as a bath water heater. A can be remotely controlled. The operation panel 35 is connected to the control unit 30 described above.
In FIG. 1, 31 is a frame rod, and 32 is a spark plug.

In the 1-can 2-circuit type bath / bath water heater A having the above-described structure, the gist of the present invention is that, in addition to the above-described basic structure, the temperature of the bath tub is equal to or higher than the set temperature during the warm-up operation. Is detected, the circulation pump P is immediately stopped, and at the same time, the time measurement of the next temperature detection interval t is started from the time when the circulation pump P is stopped.

When the hot water supply heat exchange unit a is operating when a predetermined temperature detection interval t is counted after the circulation pump P is stopped, the circulation pump P is not operated, and the hot water supply heat exchange unit a is not operated. Is stopped and the operation of the circulation pump P is started to detect the bathtub water temperature, and the hot water supply heat exchange unit a is operated during the operation of the circulation pump P for measuring the bathtub water temperature. In this case, the operation of the circulation pump P is immediately stopped, the operation of the heat exchange unit a for hot water supply is stopped, and the operation of the circulation pump P is started to detect the bathtub water temperature.

Except when the hot water supply heat exchanging unit a and the bath circulation heating heat exchanging unit b are operating at the same time, the circulation pump P is turned off after the bath has been heated or refired. It is configured to operate for a predetermined time to circulate the bathtub water, to heat the bath during the simultaneous operation, or to stop the recirculation pump P immediately when the reheating is completed, without operating the circulation pump P. It is also characterized in that the circulation pump P is immediately stopped when the hot water supply heat exchange unit a is operated while the circulation pump P is operated for a predetermined time after the heating or the reheating is completed. Having.

In this embodiment, the above operation is controlled by the control unit 30.
This will be described below with reference to the flowchart shown in FIG.

That is, the warming switch is turned on by the operation panel 35 to perform warming operation (101). When the control unit 30 determines that the warming operation is being performed (102), the timer of the control unit 30 is activated.
43 measures the temperature measurement interval t (103). Here, the temperature measurement interval t is the time when the heat retention operation is started or the driving of the circulation pump P for temperature measurement is stopped, and then the circulation pump P
Indicates the time to drive, which is 8 minutes in this embodiment.

The timer keeps counting until the temperature detection interval t elapses (104). When the temperature detection interval t elapses (105), the control unit 30 determines whether the hot water supply heat exchange unit a is operating. (106), if not working (107)
Then, the circulation pump P is driven to detect the temperature of the bath water (108). This is a so-called pre-pump. In this embodiment, the driving time (pre-pump) of the circulation pump P is set to 60 seconds.
At (109), the operation of the circulation pump P is continued until 60 seconds elapse, and the bathtub water temperature is detected while the bathtub water is circulating (110).

After the elapse of 60 seconds (111), it is determined whether or not the bath water temperature is lower than the set temperature (112). If a value exceeding the set temperature is detected (113), the circulation pump P is turned on. Stop immediately (114). Then, at the same time, the timer 43 of the control unit 30 starts measuring the temperature measurement interval t until the next pre-pump is performed (115).

On the other hand, if the detected value is lower than the set temperature (11
6) The circulation pump P is driven, and the burner 5 is ignited to perform additional heating (117).

Then, additional heating is continued until the temperature reaches a predetermined temperature (118). When it is detected that the temperature has reached the predetermined temperature (119),
Stop heating by burner 5 and end reheating (120)
.

Even if the reheating is completed, unless the operation of the hot water supply heat exchange unit a is detected (121), the circulating pump P is continuously driven (122) to perform a so-called post pump. Therefore, it is possible to prevent the post-boiling of the bathtub water staying in the heat absorbing tube 4 of the heat exchange section b for bath circulation heating.

Further, the post pump is performed (123), and when the control unit 30 determines that a predetermined time (10 seconds in this embodiment) has elapsed (124), the circulating pump P is stopped (114).

In the above-described operation flow, after the first temperature detection interval t has elapsed (105), if the heat exchange unit a for hot water supply is operating (125), in this embodiment, the timer of the control unit 30 is controlled in this embodiment. by 43, so that measures a temperature measuring interval t ₂ independent during hot water use.

That is, in the present embodiment, the independent interval t ₂ when using hot water is set to 60 minutes, and during this interval t ₂ , the circulation pump P is continuously operated while detecting the operating state of the hot water supply heat exchange unit a. Standby without driving (12
6). Then, past the interval t ₂ (127), in order to prevent excessive temperature drop of the bath water, the hot water supply heat exchanger a is to perform the fired additionally be in operation (11
7)

When the operation of the hot water supply heat exchange unit a is detected (130) during the operation of the circulation pump P for 60 seconds during the pre-pump operation (130), the circulation pump P is immediately stopped (131). Then, the system waits until the operation of the hot water supply heat exchange unit a stops (132), stops the operation of the hot water supply heat exchange unit a (107), and starts the pre-pump again (108).

Then, when it is detected that the hot water supply side is used and the hot water supply heat exchanging section a is activated during the additional heating (133), the additional heating is terminated if the temperature reaches a predetermined temperature (1).
34), the circulation pump P is stopped immediately (135). If the set temperature has not yet been reached, reheating is continued (136).

As described above, when the reheating is completed while the hot water supply heat exchange unit a and the bath circulation heating heat exchange unit b are operating at the same time, (137) the circulation pump P is not operated, That is, the circulation pump P is immediately stopped without performing the post pump (135).

By controlling the operation during the warming operation in the one-tank, two-circuit bath / bath water heater A as described above, when the pre-pump or the post-pump is performed on the bath side, the hot water side is used. Even if the hot water supply heat exchanging section a is activated, unnecessary reheating is not performed as a result,
The bathtub water temperature does not suddenly rise during bathing and does not give a bather discomfort.

The one-can, two-circuit bath / bath water heater of the present invention is not limited to the one shown in FIG. 1, but, for example, a bath / bath water heater B having the structure shown in FIG. 4 is used. You can also.

This is the same as the bath water heater A shown in FIG.
, The mixing valve 19 of the hot water supply pipe 13 and the water quantity valve 20
And a second branch branched at a position of the first branch flow path 22 after passing through a bath-side water amount detector 23, a bath-side solenoid valve 24, and a flow pressure regulating valve 25. Channel 26 and third
The branch flow path 27 is removed.

That is, the hot-water filling function as one function on the bath side is eliminated.

[0051]

According to the present invention, when a pre-pump and a post-pump are performed in a one-can, two-circuit bath / bath water heater, the bath tub water is supplied with the operation of the hot water supply heat exchange unit using the hot water supply side. No needless reburning.

Therefore, even though the bathtub water temperature is appropriate, the bathtub water temperature is not suddenly increased during the bathing by being heated with the required heat amount on the hot water supply side, so that comfortable bathing is prevented. Never do.

A one-pump, two-circuit bath / hot-water heater can be provided with a post-pump which is not generally employed, and is provided with a post-boiler bath which stays in a heat-absorbing tube of a heat exchange section for bath circulation heating. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the overall configuration of a one-can, two-circuit bath / bath water heater according to the present invention.

FIG. 2 is an explanatory diagram of a control unit provided in the bath / bath water heater.

FIG. 3 is a flowchart showing the operation and control of the bath / bath water heater.

FIG. 4 is an explanatory view showing the overall configuration of a modification of the bath / bath water heater.

[Description of sign]

 a Heat exchange unit for hot water supply b Heat exchange unit for bath circulation heating P Circulation pump 5 Burner

Continuation of the front page (72) Inventor Hiroshi Miura 431-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Prefecture Inside of Nippon Yupro Corporation (72) Inventor Kazuhisa Higashida 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo In-company (72) Inventor Shoji Inoue 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Totoki Co., Ltd. (56) References JP-A-4-236054 (JP, A) JP-A-1- 142347 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24H 1/00 604

Claims (5)

(57) [Claims] 1. A hot water supply heat exchange section (a) and a bath circulation heating heat exchange section (b) are heated by the same burner (5), and a predetermined temperature detection interval (t) is measured by a timer. The temperature of the bathtub water is measured while operating the circulation pump (P) intermittently for a predetermined time every time, and if the detected temperature is lower than the heat retention set temperature, additional heating is performed. If the bath water temperature above the set temperature is detected during the warm-up operation, the circulation pump (P) is immediately stopped, and at the same time the circulation pump (P) is stopped. A one-tank, two-circuit bath-tank hot-water supply system characterized in that the timing of the next temperature measurement interval (t) is started. 2. After the circulation pump (P) is stopped, when a predetermined temperature detection interval (t) is measured and the hot water supply heat exchange unit (a) is operating, the circulation pump (P) is operated. The operation of the hot water supply heat exchange unit (a) stops and the circulation pump (P)
2. The one-tank two-circuit bath / bath water heater according to claim 1, wherein the temperature of the bathtub is detected by starting operation of the bathtub. 3. A circulating pump for measuring the temperature of bath water.
(P) If the hot water supply heat exchange section (a) is activated during operation, the operation of the circulation pump (P) is immediately stopped and the hot water supply heat exchange section
3. The one-tank, two-circuit bath / bath water supply according to claim 1 or 2, wherein the operation of (a) is stopped and the circulation pump (P) is started to detect the bathtub water temperature. Machine. 4. A one-can, two-circuit bath / bath water heater configured to heat the hot water supply heat exchange section (a) and the bath circulation heating heat exchange section (b) with the same burner (5). Except when the heat exchange unit for hot water supply (a) and the heat exchange unit for bath circulation heating (b) are operating at the same time, the circulation pump Operate (P) for a predetermined time to circulate bath water, and if the bath heating or reheating is completed during simultaneous operation, stop immediately without operating the circulation pump (P). A one-can, two-circuit bath water heater combined with a water heater. 5. After finishing the heating or reheating,
5. The circulating pump (P) according to claim 4, wherein the circulating pump (P) is immediately stopped when the hot water supply heat exchange section (a) is activated while the circulating pump (P) is operated for a predetermined time. 1-can 2-circuit bath water heater.