JP3258453B2 - 1 can 2 circuit bath kettle - 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 kettle capable of sufficiently heating a bath at the time of hot water supply and having improved hot water supply characteristics.

[0002]

2. Description of the Related Art Conventionally, in a one-can, two-circuit bath kettle, when a request is made to use the bath while the hot water is used alone, a so-called undershoot, in which the outlet temperature of the hot water is reduced once and then returned to the set temperature. When the bath side is stopped after that, a so-called overshoot phenomenon occurs in which the tapping temperature on the hot water supply side once rises and then returns to the set temperature, resulting in deterioration of tapping characteristics.

[0003] In order to prevent such deterioration of tapping characteristics, there is one disclosed in Japanese Utility Model Laid-Open No. 3-247951.

[0004] As shown in FIG.
And the bath-side can body 52 share the fins 53, and a switching servo valve 54 (bath circulation amount adjusting device) for adjusting the amount of hot water circulated to the bath-side can body 52 is provided in the bath circuit 55. Bodies 51,52
A gas proportional valve 56 (capacity adjustment device) is provided to adjust the heat absorption of the target, and the target heat absorption is calculated in advance when shifting from single use of the hot water supply side to simultaneous use and when shifting from simultaneous use to single use of the hot water supply side. A capacity control means 57 for driving the gas proportional valve 56 for a predetermined time based on the target heat absorption amount, and at the same time, a switching servo valve 54 for the predetermined time to drive the bath It is characterized in that bath circulation amount control means 58 for controlling the circulation amount of bath water is provided.

In the drawing, reference numeral 59 denotes a circulation pump, 60 denotes a burner, 61 denotes a gas solenoid valve, 62 denotes a bath-side water amount sensor, 63 denotes a hot-water supply outlet temperature sensor, 64 denotes a hot-water supply water sensor, 65 denotes an incoming water temperature sensor, 66 is bath water temperature sensor, 67 is bath bypass waterway,
68 is an operation panel, and 69 is a control device.

With the configuration of the one-can, two-circuit bath kettle B as described above, the bath-side use is stopped when the bath-side use is requested while the hot-water supply side is used alone and during the simultaneous use. So that the hot water supply characteristics do not deteriorate.

[0007]

However, in the bath circuit 55, the above-mentioned one-can, two-circuit bath kettle B is provided with a water passage between the circulation pump 59 and the bath-side water amount sensor 62 and a bath bypass water passage 67. A switching servo valve 54 as a bath circulation amount adjusting device is provided at the branch point, and the valve 54 is driven by the bath circulation amount control means 58 for a predetermined time to control the bath circulation amount of the bath water.

Accordingly, the bath bypass circuit 67 is provided in the bath side circuit.
And the switching servo valve 54 must be provided, which has resulted in an increase in the cost of the bathtub as a whole.

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

[0010]

SUMMARY OF THE INVENTION According to the present invention, a bath heat absorption tube and a hot water supply heat absorption tube are provided in a can body, and the bath heat absorption tube and the bathtub are connected to each other through a circulation flow path provided with a circulation pump. In the connected and connected one-can two-circuit bath kettle, the combustion amount calculating means for calculating the number of required hot water supply, the sum of the predetermined number of required bath-side number and the required number of hot water supply, and the maximum number are compared. A comparison unit, and a circulation amount determining unit that determines a circulation amount of the hot water after the comparison by the comparison unit. When the hot water supply side and the bath side are used simultaneously, the circulation amount of the bath water is determined by the circulation amount determination unit. The present invention relates to a one-can, two-circuit bath kettle characterized by shifting to a simultaneous use combustion mode in which the combustion capacity is increased when it is determined that the gas has reached a predetermined flow rate.

Further, according to the present invention, when it is determined by the circulation amount determining means that the bath water reaches a predetermined instantaneous flow rate, the mode is shifted to a simultaneous use combustion mode in which the combustion capacity is increased, and It is also characterized in that when it is determined by the amount determination means that the circulating pump has been driven for a predetermined period of time, a transition is made to a simultaneous use combustion mode in which the combustion capacity is increased.

Further, the present invention provides a simultaneous use combustion mode in which a water flow switch is attached to the circulation flow path, and when the circulation amount determination means determines that the water flow switch has been turned ON, the combustion capacity is increased. When the water flow switch is attached to the circulation flow path and the circulation amount determination means determines that the water flow switch has been turned on and that a predetermined time has elapsed since the circulation pump was driven, the combustion capacity is changed. Shifting to the simultaneous use combustion mode, and installing a water flow switch in the circulation flow path,
When the hot water supply side and the bath side are used at the same time, by the comparing means, the sum of the hot water supply request number and the predetermined bath side request number,
Comparing with the maximum number of bath kettles, if the sum of the required number of hot water supply side and bath side is smaller than the maximum number of bath kettles,
When the circulation pump is turned on and the circulation amount determination means determines that the water flow switch has been turned on and when it has been determined that the circulation pump has been driven and a predetermined time has elapsed, a transition is made to a simultaneous use combustion mode in which the combustion capacity is increased. Then, when the sum of the required number of hot water supply side and bath side is larger than the maximum number of bath kettles, the ON / OFF of the circulation pump is controlled to adjust the bath circulation amount of the bath water, and When the circulation amount determination means determines that the water flow switch has been turned ON and when it has been determined that the circulation pump has been driven and a predetermined time has elapsed, a transition is made to a simultaneous use combustion mode in which the combustion capacity is increased.

[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.

In FIG. 1, reference numeral 10 denotes a number of fins arranged side by side.
11 is shared, and a plurality of heat absorption tubes for bath
Numeral 12 is a can body of a one-can, two-circuit bath kettle A having a plurality of heat absorbing tubes 13 for hot water supply attached to a lower portion.

A burner 14 for heating the can 10 is disposed below the can 10, and an electromagnetic valve 16 and a proportional valve 17 are provided in a fuel supply path 15 to the burner 14. Installed.

The heat absorbing tubes 12 and 12 for the bath are connected to each other through a U-shaped bent tube portion 18, while the heat absorbing tubes 13 and 13 for the hot water supply are connected to each other through a U-shaped bent tube portion 19. ing.

Further, the bath endothermic pipes 12 and 12 are connected to a bathtub 22 via a circulation flow path 21 in which a circulation pump 20 is mounted on the way.

A circulation pump 20 is provided in the circulation passage 21.
A water flow switch 1, a bath water amount detector 2, and a bath water temperature detector 3 are mounted on the downstream side of.

On the other hand, a water supply pipe 24 is connected to a water inlet 23 of the heat absorption pipes 13 for hot water supply, and a hot water supply pipe 26 is connected to a water outlet 25.
Are connected.

The water supply pipe 24 is provided with a water amount detector 27 and a water supply temperature detector 29, while the water supply pipe 26 is provided with a water supply temperature detector 30.

In FIG. 1, C indicates a control device, and a water amount detector 27, a hot water temperature detector 30, and a water temperature detector.
The control of the solenoid valve 16, the proportional valve 17, and the circulating pump 20 is performed based on the detection signal of the fuel cell 29. The combustion amount calculating means 4, the comparing means 5, the pump controlling means 6, , Burner control means 7, circulation amount determination means 8 and the like.

R is a remote controller such as an operation switch or a bath switch, which can give a desired operation instruction by remote control.

A 1-can 2-circuit bath kettle A having such a configuration
By using a single can body 10 by burning the burner 14,
Not only can the bathtub 22 be refired, but also hot water can be supplied to a shower or kitchen through the hot water supply pipe 26.

In this embodiment, when the hot water supply side and the bath side are used at the same time in the one-can, two-circuit bath kettle A having the above-described configuration, the number of hot water supply requests F ₁ is determined by the water amount detector 27 and the hot water supply temperature setting. Heater 28, water supply temperature detector 29 or hot water supply temperature detector 3
0, based on the detection signal of the hot water supply temperature setting unit 28, based on the calculated value, ON / OFF control of the circulation pump 20, and the bath water amount detector 2 detects that the bath water has reached a predetermined flow rate. Later, the mode shifts to the simultaneous use combustion mode in which the combustion amount of the burner 14 is increased.

That is, as shown in FIG. 2, the combustion amount calculating means 4 of the control device C calculates the water supply side feedforward combustion amount FF from the water supply temperature T _C , the hot water supply set temperature T _S , and the water supply side water amount Q _1. Further, the hot water supply side feedback combustion amount FB is calculated from the hot water supply temperature T _H and the hot water supply set temperature T _S, and the two are added to obtain the required number of hot water supply F ₁ (required combustion amount).

On the other hand, the required number F ₂ of the bath side is usually set to a predetermined value (No. 7 in the present embodiment) in accordance with the overall capacity of the bath kettle. Number F ₁ , F
Sum of ₂ and maximum number F _MAX of bath kettle A (maximum combustion capacity)
Are compared by the comparison means 5 in the control device C. In addition,
In this embodiment, the maximum number is 24.

The required number F ₁ , F of the hot water supply side and the bath side
_If the sum of ₂ is smaller than the maximum number F _MAX , the circulation amount determination means 8 determines that the bath water has reached a predetermined flow rate, and then shifts to the simultaneous use combustion mode, where the burner control means 7
Thus, the combustion is performed by increasing the capacity to the required number.

On the other hand, the larger hot water requirements scale number F _1, if the sum of the required scale number F _1, F ₂ of the hot water supply side and the bath side is greater than the maximum scale number F _MAX, the pump control means 6 The circulation pump 20 is turned ON / OFF to perform intermittent operation to adjust the circulation amount of the bath water, and when the circulation amount determination means 8 determines that the bath water has reached a predetermined flow rate, the mode shifts to the simultaneous use combustion mode. The burner control means 7 performs maximum load combustion.

Therefore, while the bath is being heated, it is possible to supply a predetermined temperature and a predetermined amount of hot water from a desired hot water destination through a hot water supply pipe while sufficiently responding to the required number F ₁ of the hot water supply side. , It is possible to prevent deterioration of the tapping characteristics such that an undershoot phenomenon occurs on the hot water supply side.

Further, since the combustion amount in the simultaneous use combustion mode is appropriate for the circulation amount of the bath water, the hot water supply side absorbs excessive heat and immediately after the simultaneous use of the hot water supply side and the bath side. In addition, there is no danger of hot water flowing out of the hot water supply side, which is safe.

Here, the ON / OFF control of the circulating pump 20 will be described with reference to FIGS.

As shown in FIG. 3, when taking a shower while reheating, etc., a water amount detector 27, a hot water temperature setting device 28, a water temperature detector 29 or a heat exchanger outlet temperature detector.
Hot water required scale number F number ₁ is given No. computed by 30 detection signal
(In the present embodiment, No. 19), a sufficiently heated bath water can be supplied to the bathtub 22.
Is continuously operated.

However, when the required number F _{1 of} hot water supply reaches a predetermined number which is the capacity limit of the bathtub A, the duty ratio of the circulation pump 20 is changed, and the circulation pump 20 is changed according to the duty ratio. Is controlled.

That is, the number of hot water supply requests F ₁ is
Hot water temperature setting unit 28, feed water temperature detector 29 or the hot water temperature detector 30 calculates the detection signal of the hot water temperature setting unit 28 (in this embodiment, No. 19) hot water required scale number F ₁ is predetermined scale number than When the duty ratio is high, as shown in FIG. 4, when the duty ratio is high, the operation cycle of the circulation pump 20 is set to be longer than the OFF time while the ON period is longer than the OFF time.
Control is performed such that the ON period of the circulation pump 20 is shorter than the OFF period.

The cycle of the ON / OFF operation of the circulation pump 20 is preferably 0.1 Hz to 3 Hz. If the cycle is too short, the circulation flow rate decreases, and the amount of water discharged in the bathtub 22 decreases. This causes a shortage of circulation in the interior, causing a problem that the temperature distribution is not uniform and gives a bather discomfort. On the other hand, if the cycle is too long, the difference between the flow rates (during stoppage and during outflow) becomes large, which may cause a temperature change on the hot water supply side.

Further, in this embodiment, the ON / OFF duty ratio of the circulation pump 20 is set to 0% in an arbitrary cycle.
Can be selected in a wide range up to 100%, it is possible to segment small in spite can be delicate hot water supply control to put the hot water required scale number F _1.

Further, the pump rotation speed of the circulation pump 20 is turned on.
Duty ratio of OFF is 100% until a predetermined value of the hot-water required scale number F _1, from exceeding a predetermined value can body to the maximum output is determined as the inverse proportionally reduced value by calculating the duty ratio You can also.

Further, the operation pattern of the circulation pump 20 is as follows.
The remote controller R, the other operation switch S, to prepare a plurality of add-fired switches _{S 1, S 2, S 3} , it may be selected freely operation pattern in accordance with the preference of the user.

The remote controller R is provided with a hot water supply temperature setting device 28, which can be set arbitrarily.

Further, in the storage device of the control device C, and based on one of the bath circulation operation pattern to store the duty ratio of the circulating pump 20, if the hot water supply demand scale number F ₁ becomes maximum (No. 19) Alternatively, the duty ratio may be set to 0, that is, the circulation pump 20 may be completely stopped. (See FIG. 3) Here, the operation of the present embodiment will be described with reference to the flowchart shown in FIG. The operation of the control device C is shown in FIG.

When the bath switch is pressed while the hot water supply side is used alone (100), the controller C turns on the bath switch (101).
The input is detected (102), and the required numbers F ₁ and F of the hot water supply side and the bath side are detected.
The sum of ₂ is calculated (103). At this time, if the ON input is not detected (104), the hot water supply side alone operation is continued.

The calculated value is compared with the maximum number F _MAX (105). If the calculated value is smaller than the maximum number F _MAX (106), the circulation pump 20 is driven to circulate the bath water. (1
07).

[0043] The water flow switch 1 mounted on the circulation flow path 21, when determining the circulation of the bathwater (108), then the circulation rate is determined whether or not reached a predetermined instantaneous flow rate Q ₂ (109), reaching if not (110), reaches repeated determination, the circulation amount is shifted to a predetermined instantaneous reach flow Q ₂ (111) concurrent combustion mode (112).

Then, the combustion capacity of the burner 14 is increased in accordance with the required number of combustion volumes to heat the hot water supply side and the bath side.
(113).

If the bath switch is pressed during the simultaneous use combustion mode and an OFF input is determined (114), the operation returns to the hot water supply side alone operation again (115). Continued (116).

By the way, the required number of hot water supply side and bath side
When comparing the calculated value of the sum of F ₁ and F ₂ with the maximum number F _MAX
(105) If the operation value is larger than the maximum number F _MAX (11
7) As described above, controlling the ON / OFF of the circulation pump 20 (118) while adjusting the circulation amount of the bath water
20 is driven (119).

The calculated value is the maximum number F _MAX
As in the case smaller than, the water flow switch 1 mounted on the circulation flow path 21, when determining the circulation of the bathwater (120), the circulation amount is determined whether or not reached a predetermined instantaneous flow rate Q ₂ (12
1) If not reached (122), the determination is repeated until it is reached. A circulation amount reaches the predetermined instantaneous flow rate Q ₂ (123), the process proceeds to the simultaneous use combustion mode (124), to heat the hot water supply side and a bath side combustion capacity of the burner 14 as the maximum load combustion
(125).

Also in this case, if the bath switch is pressed and the OFF input is determined during the simultaneous use combustion mode,
(126), the operation returns to the hot water supply side alone operation again (127),
Until then, the simultaneous use combustion mode has continued (128)
.

When the circulation of the bath water is determined by the water flow switch 1 (108) (120), if the circulation cannot be detected,
(129) (130), ON water flow switch 1 until a predetermined time T ₁
While repeating the same routine to perform detection (131), when unable ON detected the predetermined time T ₁ is elapsed (132)
The circulation pump 20 is stopped for safety (133).

FIG. 6 is a flowchart according to another embodiment of the present invention.

In this embodiment, in the flow chart shown in FIG. 5, it is determined whether or not the circulation amount has reached a predetermined instantaneous flow rate Q ₂ at a stage before shifting to the simultaneous use combustion mode (109) (121). Alternatively, for example, a timer means provided in the control unit C, and the circulation pump 20 is driven to determine whether the predetermined time T ₂ has elapsed (134) (135), so as to shift to the simultaneous use combustion mode I have.

[0052] In this embodiment, as in the previous embodiment, while heating the bath side able to meet fully the requirements scale number F ₁ of the hot water supply side, at a predetermined temperature and a predetermined amount through a hot water supply pipe water Can be discharged from a desired tapping destination.
Then, when the bath-side operation is performed, it is possible to prevent the deterioration of the tapping characteristics such that the undershoot phenomenon occurs on the hot water supply side.

Further, since the combustion amount in the simultaneous use combustion mode is appropriate for the circulation amount of the bath water, the hot water supply side absorbs excessive heat and immediately after the simultaneous use of the hot water supply side and the bath side. In addition, there is no danger of hot water flowing out of the hot water supply side, which is safe.

[0054]

As described above, according to the present invention,
In a one-can, two-circuit bath kettle in which a bath heat absorption tube and a hot water supply heat absorption tube are arranged in a can body, and the bath heat absorption tube and the bathtub are connected to each other through a circulation flow path equipped with a circulation pump. After the comparison by the combustion amount calculating means for obtaining the required number, the sum of the predetermined required number of the bath side and the required number of hot water supply, and the maximum number, A circulation amount determining means for determining a circulation amount of the hot water, when the hot water supply side and the bath side are used at the same time, when it is determined that the circulation amount of the bath water has reached a predetermined flow rate by the circulation amount determination means. By switching to the simultaneous use combustion mode, which increases the combustion capacity, it can meet the required number of hot water supply side while heating the bath while keeping the bath circulation path simple. be able to.

Therefore, a predetermined temperature and a predetermined amount of hot water can be discharged from a desired hot water destination through the hot water supply pipe.

Further, when the bath-side operation is performed, it is possible to prevent the deterioration of the tapping characteristics such that the undershoot phenomenon occurs on the hot-water supply side.

Further, since the combustion amount in the simultaneous use combustion mode is appropriate for the circulation amount of the bath water, the hot water supply side absorbs excessive heat and immediately after the simultaneous use of the hot water supply side and the bath side. In addition, there is no danger of hot water flowing out of the hot water supply side, which is safe.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the overall configuration of a one-can, two-circuit bath kettle according to the present invention.

FIG. 2 is a block diagram showing control of combustion in the bath kettle.

FIG. 3 is an explanatory diagram showing a relationship between a required number of hot water supply side of the bath kettle and a duty ratio of a circulation pump.

FIG. 4 is an explanatory diagram of ON / OFF operation of a circulation pump.

FIG. 5 is a flowchart showing a control operation of combustion in a one-can, two-circuit bath kettle according to the present invention.

FIG. 6 is a flowchart showing a control operation of combustion in a one-can, two-circuit bath kettle according to another embodiment of the present invention.

FIG. 7 is an explanatory diagram of the overall configuration of a conventional one-can, two-circuit bath kettle.

[Explanation of symbols]

A 1-can 2-circuit bath kettle C controller F ₁ Number of hot water supply requests T ₂ Predetermined time 10 Can body 12 Heat absorption pipe for bath 13 Heat absorption pipe for hot water supply 14 Burner 20 Circulation pump 21 Circulation flow path 22 Bathtub

Continued on the front page (72) Inventor Masahiro Hattori 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Inside of Nippon Yupro Corporation (72) Inventor Hiroshi Miura 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo In-company (72) Inventor Katsunori Tanaka 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Totoki Co., Ltd. (56) References JP-A-6-185809 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) F24H 1/10 301 F24H 1/00 604

Claims (6)

(57) [Claims] A heat absorbing tube for bath (12) and a heat absorbing tube for hot water supply (13) are disposed in a can (10), and a circulation pump (12) is connected to the heat absorbing tube for bath (12) and a bathtub (22). In a one-can, two-circuit bath kettle, which is connected and connected via a circulation flow path (21) equipped with a 20), a combustion amount calculating means (4) for obtaining a required number of hot water supply (F ₁ ) ; The required number (F ₂ ) and the number of hot water supply required (F ₁ )
And a comparison means (5) for comparing the sum of the hot water and the maximum number (F _MAX ). After the comparison by the comparison means (5) , the circulation amount of the bath water is determined.
Circulating amount determining means (8), and when the hot water supply side and the bath side are used at the same time, the circulating amount determining means
According to (8), it is determined that the bath water circulation amount has reached the predetermined flow rate.
Simultaneous use combustion mode that increases combustion capacity when specified
A one-can, two-circuit bath kettle characterized by a shift to . 2. A bath water is supplied by the circulation amount determining means (8).
When it is determined that the constant instantaneous flow rate (Q ₂ ) has been reached, the combustion capacity
2. The one-can, two-circuit bath kettle according to claim 1, wherein the mode shifts to a simultaneous use combustion mode in which the power is increased . 3. The circulation pump according to claim 1, wherein
It is determined that the predetermined time (T ₂ ) has elapsed after the drive of the pump (20)
Shift to simultaneous use combustion mode to increase combustion capacity
1 can 2-circuit bathtub according to claim 1, characterized in that. 4. A water flow switch (1) is provided in said circulation channel (21).
And the circulation amount determination means (8)
If it is determined that the switch (1) is ON, the combustion capacity
2. The one-can, two-circuit bath kettle according to claim 1, wherein the mode shifts to a simultaneous use combustion mode in which the temperature of the bath is increased . 5. A water flow switch (1) is provided in said circulation channel (21).
And the circulation amount determination means (8)
(1) ON detection and when the circulation pump (20) is driven
Combustion capacity is increased when it is determined that the time (T ₂ ) has elapsed.
2. The one-can, two-circuit bath kettle according to claim 1, wherein the mode shifts to a simultaneous use combustion mode . 6. A water flow switch (1) is provided in said circulation channel (21).
When using the hot water supply side and the bath side at the same time,
According to (5), the number of hot water supply requests (F ₁ ) and the required
Compare the sum with the number (F ₂ ) and the maximum number of bath kettles (F _MAX ).
The sum of the required number (F ₁ ) (F ₂ ) of the hot water supply side and the bath side
If the number is smaller than the maximum number (F _MAX ), turn on the circulation pump (20).
ON and the circulation amount determination means (8)
Flow switch (1) ON detection and the circulation pump (20)
If it is determined that the predetermined time (T ₂ ) has elapsed, the combustion
Shift to the simultaneous use combustion mode, which increases the capacity, and the sum of the required number (F ₁ ) (F ₂ ) of
If the number is larger than the maximum number (F _MAX ),
When ON / OFF is controlled to adjust the bath circulation of bath water
Both, by the circulation amount determination means (8), the water flow switch (1)
Is detected and the circulation pump (20) is driven for a predetermined time (T ₂ )
If it is determined that the time has passed, increase the combustion capacity
Claims: Shifting to a simultaneous use combustion mode.
The 1-can 2-circuit bath kettle according to 1.