JPH0610558B2 - Water heater - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hot water supply device, and more specifically, a hot water supply passage from a water heating heat exchanger heated by a burner is provided with a first hot water supply passage and a second hot water supply passage. A water supply temperature sensor for detecting a water supply temperature (T ₁ ) in the water supply path by connecting a mixed water supply path branched from the water supply path to the heat exchanger to the second hot water supply path. A hot water temperature sensor for detecting the hot water temperature (T ₂ ) from the hot water, and a hot water temperature sensor for detecting the hot water temperature (T ₃ ) in the second hot water passage downstream of the connection point of the hot water supply passage are provided. Regarding water heaters.

[Conventional technology]

In the hot water supply device as described above, for example, the first hot water supply passage or the second hot water supply passage is used as a bath hot water supply passage, and a function of automatically stopping the bath hot water supply when the amount of hot water supplied to the bath reaches a predetermined amount is provided. It is necessary to grasp the amount of hot water supplied to the first hot water supply passage or the amount of hot water supplied to the second hot water supply passage.

However, in the case where the hot water supply from the first hot water supply passage and the hot water supply from the second hot water supply passage are selectively possible, the first hot water supply passage is detected by detecting the amount of water supplied from the water supply passage to the heat exchanger. It is possible to grasp the amount of hot water supplied to the heat exchanger and to detect the sum of the amount of water supplied to the heat exchanger and the amount of shunt water supplied to the mixed water supply channel.
The amount of hot water supplied to the hot water supply passage (the amount of hot water supply in the second hot water supply passage on the downstream side of the connection point of the mixed water supply passage) can be grasped.
In the case of enabling simultaneous hot water supply from the hot water supply passage and the hot water supply from the second hot water supply passage, if the diversion ratio to the first hot water supply passage and the second hot water supply passage is uncertain, the first hot water supply passage or It was necessary to directly attach a flow rate sensor to the hot water supply amount to the second hot water supply passage.

[Problems to be Solved by the Invention]

However, in order to attach the flow rate sensor to the hot water supply passage through which the hot water flows, there is a constraint that a special flow rate sensor having a corresponding heat resistance must be used.

The object of the present invention is to enable simultaneous hot water supply from the first hot water supply path and the second hot water supply path, by utilizing the detection information of temperature sensors provided in various places for hot water temperature control,
The point is that the amount of hot water supplied to the first hot water supply passage or the amount of hot water supplied to the second hot water supply passage can be accurately grasped only by detecting the flow rate on the water supply side.

[Means for Solving the Problems]

The hot water supply device according to the present invention is characterized in that a hot water supply passage from a water heating heat exchanger heated by a burner is branched into a first hot water supply passage and a second hot water supply passage, and a water supply passage to the heat exchanger is branched. The mixed water supply passage is connected to the second hot water supply passage, the inlet water temperature sensor for detecting the water supply temperature (T ₁ ) in the water supply passage, the outlet water temperature sensor for detecting the outlet water temperature (T ₂ ) from the heat exchanger In a configuration in which a mixed hot water temperature sensor that detects a hot water temperature (T ₃ ) in the second hot water supply passage downstream of a connection point of the mixed water supply passage is provided, the amount of water supplied to the heat exchanger (S ₁ ) , And a water amount detecting means for detecting the divided water supply amount (S ₂ ) to the mixed water supply passage, and each of the sensors and the detection information of the water amount detecting means (T
₁ ), (T ₂ ), (T ₃ ), (S ₁ ), (S ₂ ) are input and the amount of hot water supplied to the first hot water supply channel (Q ₁ ) or the mixed water supply channel A calculation means for calculating the hot water supply amount (Q ₂ ) in the second hot water supply passage on the downstream side of the connection point is provided, or the split water supply amount (S ₂ ) to the mixed water supply passage (8) is calculated. A water amount detecting means for detecting is provided, and the detection information (T ₁ ), (T ₂ ), (T ₃ ), (S ₂ ) of each of the above-mentioned sensors and the water amount detecting means is inputted and the following (d) formula is given. Based on This is because the calculation means for calculating the hot water supply amount (Q ₂ ) in the second hot water supply passage on the downstream side of the connection point of the mixed water supply passage is provided, and the operation and effect are as follows.

[Action]

In other words (see Fig. 2), the water supply temperature in the water supply channel (6) is
T ₁ , hot water temperature from the heat exchanger (2) is T ₂ , hot water temperature in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8) is T ₃ , and If the amount of water supplied to the heat exchanger (2) is S ₁ and the amount of divided water supply to the mixed water supply channel (8) is S ₂ , the amount of heat carried from the mixed water supply channel (8) to the second hot water supply channel (3B) Is S
₂ · T ₁

Then, the hot water supply amount from the heat exchanger (2) to the first hot water supply passage (3A) is Q
If the value is ₁ , the heat quantity carried from the heat exchanger (2) to the second hot water supply passage (3B) is (S ₁
-Q ₁ ) ・ T ₂ .

However, the heat capacity of the hot water in the second hot water supply passage (3B) downstream of the connection point of the mixed water supply passage (8) is (S ₁ + S ₂ -Q ₁ ) ・ T ₃
However, the amount of heat possessed is the amount of heat S ₂ · T ₁ carried in from the mixed water supply channel (8) and the amount of heat carried in from the heat exchanger (2) to the second hot water supply channel (3B) (S ₁ -Q ₁ ) ・Since it is the sum with T ₂ , S ₂ · T ₁ + (S ₁ −Q ₁ ) · T ₂ = (S ₁ + S ₂ −Q ₁ ) · T ₃ holds, and from this equation, Is obtained.

That is, even in the simultaneous hot water supply state from the first hot water supply passage (3A) and the second hot water supply passage (3B), the detection information (T ₁ ), (T ₂ ), (T ₃ ), the amount of water supplied to the heat exchanger (2) (S ₁ ) detected by the water amount detection means, and the amount of divided water supply (S ₂ ) to the mixed water supply channel (8) Hot water supply channel (3A)
The amount of hot water supplied (Q ₁ ) can be calculated and grasped.

The amount of hot water supplied to the second hot water supply passage (3B) (Q ₂ ) (the amount of hot water supplied to the second hot water supply passage (3B) downstream of the connection point of the mixed water supply passage (8)) is expressed by the following formula (b). Q ₂ = S ₁ + S ₂ −Q ₁ − (b) If the above equations (a) and (b) are simultaneous equations and the simultaneous equations are solved, the first equation is similarly obtained. Hot water supply channel (3A) and second hot water channel (3B)
Even in the simultaneous hot water supply condition from and, the detection information (T ₁ ), (T ₂ ), (T ₃ ), (S ₁ ), (S
_{From 2} ), it is possible to calculate and grasp the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8).

In short, if each temperature sensor and the detection information (T ₁ ), (T ₂ ), (T ₃ ), (S ₁ ), (S ₂ ) of the water amount detecting means are input, the first hot water supply passage (3A ) And the second hot water supply passage (3B) at the same time, the hot water supply to the first hot water supply passage (3A) from the heat balance relationship expressed by the above formulas (a) and (b) as an example. The amount (Q ₁ ) and the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8) can be calculated and grasped.

Furthermore, if the simultaneous equations of the above equations (a) and (b) are solved,
Equation (d) is obtained, If this equation (d) is used, the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8) is detected by the detection information (T ₁ ) of each temperature sensor. It can be calculated and grasped only by detecting the branched water supply amount (S ₂ ) to the mixed water supply channel (8) in addition to (T ₂ ), (T ₂ ), and (T ₃ ).

[Effects of the Invention] As a result of the above, even in the case of enabling the simultaneous hot water supply from the first hot water supply passage and the second hot water supply passage, the detection information of the temperature sensor is used to detect only the flow rate on the water supply side. Since the amount of hot water supplied to the first hot water supply passage or the amount of hot water supplied to the second hot water supply passage can be accurately grasped and the fluid can be detected on the water supply side, a special flow rate sensor having heat resistance must be used. It is possible to avoid the conventional restrictions such as, and it is advantageous in terms of manufacturing and manufacturing cost.

〔Example〕

 Next, an embodiment will be described with reference to FIG.

A general hot water supply passage (first hot water supply passage) (3A) that connects the hot water supply passage (3) from the heat exchanger (2) for heating water heated by the gas burner (1) to the general hot water tap (4), and a bathtub The first mixture branched from the hot water supply passage (second hot water supply passage) (3B) connected to (5) and the general hot water supply passage (3A) branched from the water supply passage (6) to the heat exchanger (2). Water supply
In addition to connecting (7), the hot water supply passage for bath (3B) is also connected to the second mixed water supply passage (8) branched from the water supply passage (6).

The fuel gas supply passage (9) for the gas burner (1) is provided with a gas valve (10) for connecting and disconnecting the fuel gas supply and a gas amount adjusting valve (11) for adjusting the fuel gas supply amount to provide general hot water supply. In the passage (3A) and the bath hot water supply passage (3B), the first and second flow rate adjusting valves (1) are provided on the downstream side of the connection points of the mixed water supply passages (7) and (8).
2), (13), and the first and second mixed water supply channels (7), (8)
The first and second mixed water amount adjusting valves (14), (15) are installed in the chamber.

(16) is a vacuum break valve that prevents backflow of bath water, and
Reference numeral (17) is a check valve for preventing a backflow caused by the supply of the mixed water from the first mixed water supply passage (7).

Operation control is executed by the control device (18), but the control device
The sensors that give various information to (18) include the first water quantity sensor (1) that detects the water supply quantity (S ₁ ) to the heat exchanger (2).
9), the second water flow sensor (20) that detects the split flow water supply amount (S ₂ ) to the second mixed water supply channel (8), the water supply temperature in the water channel (6)
From the connection point of the incoming water temperature sensor (21) that detects (T ₁ ), the outgoing hot water temperature sensor (22) that ignores the outgoing hot water temperature (T ₂ ) from the heat exchanger (2), and the first mixed water supply channel (7) General hot water supply passage (3
The first mixed hot water temperature sensor (2) that detects the hot water temperature (T ₄ ) in A)
3), and second for detecting the hot water temperature (T ₃ ) in the bath hot water supply passage (3B) on the downstream side of the connection point of the second mixed water supply passage (8)
A mixed hot water temperature sensor (24) is provided.

Further, as a remote controller for giving an operation command to the control device (18), a main controller (25) installed near the general hot water tap (4) and a bath side controller (26) installed in a bathroom are provided. .

The control device (18) executes operation control as described in (a) to (c) below.

(a) Single general hot water supply When the first water quantity sensor (19) detects the start of water supply due to the opening of the general hot water tap (4), the gas valve is based on the detection of the start of water supply.
Open the (10), ignite the gas burner (1), and open the general hot water supply passage (3
Start hot water supply to A). The first flow rate adjusting valve (12) is normally kept fully open.

And the set hot water temperature that is fixedly set inside the device
(T _SX ) (for example, 80 ° C), the detected water supply amount (S ₁ ) of the first water amount sensor (19) that changes depending on the opening of the general hot water tap (4), and the detected water temperature (T ₁ ) of the incoming water temperature sensor (21) ) Based on the gas burner
Adjust the gas amount adjusting valve (11) so that the combustion amount (G) of (1) is the value G = S ₁ · (T _SX −T ₁ ) obtained by the following equation, and adjust the outlet temperature sensor (22). Detected hot water temperature (T ₂ ) and set hot water temperature
Based on the deviation between the (T _SX), so as to match the detected hot water temperature (T ₂₎ the set hot water temperature (T _SX), adding the correction with respect to the gas amount adjusting valve control described above.

Further, in parallel with this, the detected hot water temperature (T ₄ ) of the first mixed hot water sensor (23) is made to match the set hot water temperature (T _SA ) of the general hot water supply side designated by the main controller (25). , First
By adjusting the mixed water amount adjusting valve (14), the mixed water supply amount from the first mixed water supply passage (7) to the general hot water supply passage (3A) is adjusted, whereby the hot water supply temperature from the hot water tap (4) is generally adjusted. Keep the hot water temperature (T _SA ) set on the hot water supply side.

In the adjustment control of the gas amount adjustment valve (11) based on the equation G = S ₁ · (T _SX −T ₁ ), if the calculated combustion amount (G) exceeds the set upper limit value (GM), 1 Adjust the first flow rate adjusting valve (12) by throttling so that the detected water supply amount (S ₁ ) of the water amount sensor (19) becomes a value that satisfies the following formula S ₁ = GM / (T _SX −T ₁ ). This prevents overcapacity.

(b) Single-bath hot water supply Bath hot water is provided with an additional heating mode for supplying high-temperature water for bath water heating to the bathtub (5) and a pouring mode for supplying hot water for hot water filling to the bathtub (5). However, in any mode, when the bath-side controller (26) gives a bath hot water supply command, the second flow rate adjusting valve (13) is opened and the gas valve is opened.
Open (10) to ignite the gas burner (1),
Start hot water supply to B).

When the designated mode from the bath controller (26) is the pouring mode, the gas amount adjusting valve (11) is set so that the combustion amount (G) of the gas burner (1) becomes the set upper limit value (GM). The second flow rate adjusting valve (so that the detected water supply amount (S ₁ ) of the first water amount sensor (19) becomes a value that satisfies the following equation S ₁ = GM / (T _SX −T ₁ ) 13) together with the adjusting, based on the deviation between the detected hot water temperature (T ₂₎ and the set tapping temperature of hot water temperature sensor (22) (T _SX), detected hot water temperature (T ₂₎
To match the set hot water temperature (T _SX ).
Correction was made to the flow rate control valve control, and in parallel with this, the hot water temperature (T ₃ ) detected by the second mixed hot water temperature sensor (24) was commanded from the bath controller (26) for hot water filling. Set hot water temperature
The second mixed water amount adjusting valve (15) is adjusted to match (T _SB ), and the mixed water supply amount from the second mixed water supply passage (8) to the bath hot water supply passage (3B) is adjusted. , While keeping the hot water supply temperature to the bathtub (5) to the set hot water supply temperature for hot water filling (T _SB ),
In this pouring mode, the hot water supply capability of the device is fully exerted.

On the other hand, when the designated mode from the bath controller (26) is the additional heating mode, the second mixed water amount adjusting valve (15) is kept closed, and the supply amount of the hot water for bath water heating is increased. From the viewpoint of safety, the first water amount sensor is controlled so that it is controlled to a predetermined amount.
Based on the detection information of (19), with the opening of the second flow rate adjusting valve (13) regulated to a predetermined safety opening, the predetermined hot water temperature
A value obtained by the following equation for the combustion amount (G) of the gas burner (1) with respect to the set reheating temperature (T _SY ) (for example, 93 ° C) that is fixedly set inside the device together with (T _SX ) G = S with adjusting ₁ · (T _SY -T ₁₎ to as gas volume control valve (11), detecting hot water temperature (T ₂₎ and the set additionally焚温of the hot water temperature sensor (22)
Based on the deviation between the (T _SY), sets the detection hot water temperature (T ₂₎ to match the add焚温degree (T _SY), the correction was added to gas amount adjusting valve control described above, whereby, bathtubs Set the hot water supply temperature to (5) to the set heating temperature (T _SY ).

In addition, these single bath hot water supply (pouring mode and reheating mode)
Then, in preparation for opening the general hot water tap (4) (start of simultaneous hot water supply described later), the hot water temperature detected by the first mixed hot water temperature sensor (23) (T
₄ ) Adjusts the first mixed water flow rate adjustment valve (14) so that it matches the set hot water temperature (T _SA ) on the general hot water supply side, but the general hot water supply side mixing control is performed in parallel, but the general hot water tap (4) is opened. Unless it is plugged, actual water supply from the first mixed water supply passage (7) to the general hot water supply passage (3A) does not occur.

(c) Simultaneous hot water supply with bath hot water and general hot water When the general hot water tap (4) is opened in the single bath hot water supply state, the hot water supplied from the heat exchanger (2) (set hot water temperature (T _SX )) Or, part of the set heating temperature (T _SY ) hot water will be diverted to the general hot water supply passage (3A) side, and the split hot water and the water supplied from the first mixed water supply passage (7) The mixed hot water is supplied to the general hot water tap (4), while the first mixed hot water temperature sensor (2
General hot water supply that adjusts the first mixed water volume adjustment valve (14) so that the detected hot water temperature (T ₄ ) in 3) matches the set hot water supply temperature (T _SA ) on the general hot water supply side specified by the main controller (25) By continuing the side mixing control from the single bath hot water supply state, the hot water supply temperature from the hot water tap (4) is kept at the set hot water supply temperature (T _SA ) of the general hot water supply side.

Also, unless there is a cancellation of the bath hot water supply command from the bath controller (26), the hot water temperature control in the pouring mode or the reheating mode is performed with the second flow rate adjusting valve (13) kept open. Continuously continues from the single bath hot water supply state, whereby the hot water supply temperature to the bathtub (5) is kept at the hot water supply set temperature for hot water filling (T _SB ) or the set reheating temperature (T _SY ).

That is, as described above, the bath hot water supply and the general hot water supply in the pouring mode or the additional heating mode are simultaneously performed while keeping the respective hot water supply temperatures at the respective predetermined temperatures.

On the other hand, when the bath hot water supply command is given during the execution of the single general hot water supply, the bath hot water supply of the above item (b) is started and executed at that time, and then the simultaneous hot water supply in the same form as described above is performed. An example is given.

Note that when simultaneous hot water supply is started, the heat exchanger water supply amount (S ₁ ) increases compared to the previous single hot water supply state, but in the case of simultaneous hot water supply in the pouring mode, the combustion amount (G) is set. With the upper limit value (GM), the second flow rate is adjusted so that the detected water supply amount (S ₁ ) of the first water amount sensor (19) becomes a value that satisfies the formula S ₁ = GM / (T _SX −T ₁ ). A state in which the bath-side hot water supply amount is limited by the throttle adjustment of the second flow rate adjusting valve (13) because the water supply amount control for adjusting the adjusting valve (13) is executed (in other words, a general hot water supply is given priority) Thus, the excessive increase of the water supply amount (S ₁ ) of the heat exchanger is avoided, whereby the excess capacity is prevented and the simultaneous hot water supply is performed in a state where the hot water supply capacity of the device is fully utilized without waste.

In the case of simultaneous hot water supply in the additional heating mode, the second flow rate adjustment valve
Even though the opening of (13) is regulated to a predetermined safe opening, the equation G = S ₁ · (T _SY −T ₁ ) is required to increase the water supply amount (S ₁ ) of the heat exchanger by simultaneous hot water supply. Combustion amount calculated by
When (G) exceeds the set upper limit (GM), the combustion amount (G)
With the setting upper limit value (GM) set, the first water sensor (19)
Water supply to further regulate the second flow rate control valve (13) beyond the specified safe opening so that the detected water supply amount (S ₁ ) of is a value that satisfies the formula S ₁ = GM / (T _SY −T ₁ ). Amount control is performed to prevent overcapacity due to excessive increase in heat exchanger water supply amount (S ₁ ) in the state where priority is given to general hot water supply as in the case of simultaneous hot water supply in the pouring mode described above. .

Further, in the simultaneous hot water supply state, if the detected water supply amount (S ₁ ) of the first water amount sensor (19) is still excessive even if the second flow rate adjusting valve (13) is adjusted to be fully closed, the second flow amount When the regulating valve (13) is closed (bath hot water supply is stopped), the detected water supply amount (S ₁ ) of the first water amount sensor (19) is expressed by the formula S ₁ = GM / (T
_SX- T ₁ ) (in the pouring mode), or the formula S ₁ =
GM / (T SY -T ₁₎ Run the aperture adjustment of _{(additionally} fired in mode) first flow rate adjusting valve so that the pouring satisfying the (12), thereby preventing ability over.

The controller (18) includes an operation unit (18A) that executes the basic operation control described in (a), (b), and (c) above, as well as the amount of hot water supplied to the bathtub (5) in the pouring mode (Q ₂ ) is sequentially calculated and grasped, and is calculated by the calculation unit (18B) that calculates the integrated value (ΣQ ₂ ) of the calculated hot water supply amount (Q ₂ ) from the start of pouring, and the calculation unit (18B). A value stop execution unit (18C) is provided to give a bath hot water supply stop command to the operating unit (18A) when the accumulated hot water supply amount (ΣQ ₂ ) reaches the amount of hot water specified by the bath controller (26). Thus, when the amount of hot water reaches the designated amount, the bath hot water supply in the pouring mode is automatically stopped.

In the calculation unit (18B), each temperature sensor (21), (22), (2
Input the detection information (T ₁ ), (T ₂ ), (T ₃ ) of ₄ ) and the detection information (S ₁ ), (S ₂ ) of the first and second water amount sensors (19), (20). Then, based on the formula (C) below The amount of hot water supplied to the bathtub (5) (Q ₂ ) is calculated sequentially, so that even if simultaneous hot water supply with the normal hot water is interrupted during the execution of the pouring mode, the hot water is supplied to the general hot water supply side. The accumulated hot water supply amount (ΣQ ₂ ) to the bathtub (5) can be accurately obtained with the minutes corrected.

In addition, each temperature sensor (21), (2
2) and (24) are used to calculate the hot water supply amount (Q ₂ ) to the bathtub (5) based on the formula (c) above, so that the hot water supply passage (3B) in which hot water flows The amount of hot water supplied to the bathtub (5) (Q ₂ ) only by detecting the flow rate on the water supply side by the first and second water amount sensors (19), (20) without providing a special heat-resistant flow rate sensor.
As described above, it is possible to accurately grasp whether or not there is simultaneous hot water supply, thereby reducing the device cost and improving the reliability in terms of durability.

[Another embodiment]

 Next, another embodiment will be described.

(A) As shown in FIG. 2, the hot water supply passage (3) from the water heating heat exchanger (2) heated by the burner (1) is connected to the first hot water supply passage (3A) and the second hot water supply passage (3B). ) And a water supply channel (6) to the heat exchanger (2)
The mixed water supply channel (8) branched from the second hot water supply channel (3B) is connected, and the water temperature sensor (21) for detecting the water temperature (T ₁ ) in the water channel (6) as a temperature sensor, Heat exchanger (2)
Hot water temperature sensor (22) that detects the hot water temperature (T ₂ ) from the water, and the _second hot water temperature sensor downstream from the connection point of the mixed water supply channel (8).
Each of the mixed hot water temperature sensors (24) for detecting the hot water temperature (T ₃ ) in the hot water supply passage (3B) is provided, and the water supply amount (S ₁ ) to the heat exchanger (2) and the mixed water supply passage (8 ), The amount of hot water supplied to the first hot water supply passage (3A) (Q ₁ ) is grasped in the basic configuration in which the water amount detecting means (19), (20) for detecting the amount of divided water supply (S ₂ ) are provided. If necessary, each temperature sensor (21), (22), (24) of the previous term,
Also, the detection information (T ₁ ), (T ₂ ), of the water amount detection means (19), (20),
Input (T ₃ ), (S ₁ ), (S ₂ ) and the following formula (a) or various modified formulas of the formula (a) (for example, based on the following formula (a ′)) A calculation means for calculating the hot water supply amount (Q ₁ ) to the first hot water supply passage (3A) may be provided.

(Ii) Further, in the above-mentioned basic configuration, the hot water supply amount (Q) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8)
₂ ), it is necessary to know the temperature sensor (21), (22), (24), and the water amount detection means (19), (20) detection information (T ₁ ), ( Enter (T ₂ ), (T ₃ ), (S ₁ ), (S ₂ ), and enter the following (a).
Based on simultaneous equations of equation and (b), or various modified equations of the simultaneous equations (for example, equation (c) below) The second hot water supply passage downstream of the connection point of the mixed water supply passage (8)
A calculation means for calculating the hot water supply amount (Q ₂ ) in (3B) may be provided.

(Iii) In addition, enter only the divided water supply amount (S ₂ ) to the mixed water supply channel (8) as the water amount information and based on the following equation (d). The second hot water supply passage downstream of the connection point of the mixed water supply passage (8)
A calculation means for calculating the hot water supply amount (Q ₂ ) in (3B) may be provided.

(B) As a water amount detection means, a water amount sensor (19) that detects the amount of water (S ₁ ) supplied to the heat exchanger (2), and a water supply passage (8) upstream of the branch point of the mixed water supply passage (8) ( 6) is provided with a water amount sensor (20 ′) (shown by a broken line in FIG. 2) for detecting the water supply amount (S ₀ ), and a difference (S ₀ ) between detection values of these water amount sensors (19) and (20 ′) is provided. -Diversion water supply (S ₂ ) from S ₁ ) to mixed water supply channel (8)
May be detected, and the specific configuration of the water amount detecting means can be modified in various ways.

(C) In the configuration shown in FIG. 2, the hot water supply target of each of the first hot water supply passage (3A) and the second hot water supply passage (3B) may be any, and the first hot water supply passage (3A) is used as a bath hot water supply passage. And, the second hot water supply passage (3B)
May be used as a general hot water supply passage and vice versa.

(D) The purpose of calculating the hot water supply amounts (Q ₁ ) and (Q ₂ ) is not limited to grasping the amount of hot water filling the bathtub, and may be any purpose.

(E) Further, by inputting the detection information of each temperature sensor and the water amount detecting means, the amount of hot water supplied to the first hot water supply passage (3A) (Q ₁ ) or the mixed water supply passage (8) from the heat balance relation. Various forms and configurations can be adopted for the specific calculation form for calculating the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) downstream of the connection point and the specific configuration of the calculation means.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures and methods of the accompanying drawings by the description.

[Brief description of drawings]

FIG. 1 is a device configuration diagram showing an embodiment of the present invention. Second
The figure is a schematic diagram illustrating another embodiment of the present invention. (1) …… Burner, (2) …… Heat exchanger, (3) …… Hot water supply channel, (3
A) …… first hot water supply channel, (3B) …… second hot water supply channel, (6) …… water supply channel, (8) …… mixed water channel, (19), (20) …… water quantity detection means,
(21) …… Inlet water temperature sensor, (22) …… Outlet water temperature sensor, (2
4) …… Mixed water temperature sensor, (S ₁ ) …… Heat exchanger water supply amount, (S
₂ ) …… Diversion water supply amount, (T ₁ ) …… Water supply temperature, (T ₂ ) …… Outlet temperature, (T ₃ ) …… Hot water temperature, (Q ₁ ), (Q ₂ ) …… Hot water supply amount.

Claims (6)

[Claims] 1. A hot water supply passage (3) from a water heating heat exchanger (2) heated by a burner (1) is provided with a first hot water supply passage (3A) and a second hot water supply passage.
(3B) and the mixed water supply passage (8) branched from the water supply passage (6) to the heat exchanger (2) is connected to the second hot water supply passage (3B),
Inlet water temperature sensor (21) for detecting the water supply temperature (T ₁ ) in the water supply channel (6), outlet water temperature sensor (22) for detecting the outlet water temperature (T ₂ ) from the heat exchanger (2), Hot water temperature (T) in the second hot water supply passage (3B) downstream of the connection point of the mixed water supply passage (8)
₃ ) is a hot water supply device provided with a mixed hot water temperature sensor (24), the amount of water supplied to the heat exchanger (2) (S ₁ ), and the split water supply to the mixed water supply channel (8) A water amount detecting means (19), (20) for detecting the amount (S ₂ ) is provided, and the respective sensors (21), (22), (2
4), and detection information of the water amount detection means (19), (20)
Input (T ₁ ), (T ₂ ), (T ₃ ), (S ₁ ), (S ₂ ), and supply the amount of hot water (Q ₁ ) to the first hot water supply passage (3A) from the heat balance relation, or , The second hot water supply passage (3) downstream of the connection point of the mixed water supply passage (8)
A hot water supply apparatus provided with a calculation means for calculating the hot water supply amount (Q ₂ ) in B). 2. The calculation means is based on the following equation (a). The hot water supply apparatus according to claim 1, wherein the hot water supply amount (Q ₁ ) to the first hot water supply passage (3A) is calculated. 3. The calculation means is based on the following equation (a ′), which is a modification of the equation (a). The hot water supply apparatus according to claim 2, wherein the hot water supply amount (Q ₁ ) to the first hot water supply passage (3A) is calculated. 4. The calculation means is based on simultaneous equations of the following equations (a) and (b). The hot water supply apparatus according to claim 1, wherein the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8) is calculated. 5. The calculation means calculates Q ₁ from the equations (a) and (b).
Based on the following formula (C), which is a modified formula that omits The hot water supply apparatus according to claim 4, wherein the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8) is calculated. 6. A hot water supply passage (3) from a water heating heat exchanger (2) heated by a burner (1) is provided with a first hot water supply passage (3A) and a second hot water supply passage.
(3B) and the mixed water supply passage (8) branched from the water supply passage (6) to the heat exchanger (2) is connected to the second hot water supply passage (3B),
Inlet water temperature sensor (21) for detecting the water supply temperature (T ₁ ) in the water supply channel (6), outlet water temperature sensor (22) for detecting the outlet water temperature (T ₂ ) from the heat exchanger (2), Hot water temperature (T) in the second hot water supply passage (3B) downstream of the connection point of the mixed water supply passage (8)
₃ ) is a hot water supply device provided with a mixed hot water temperature sensor (24), which is provided with water amount detection means (20) for detecting the split supply water amount (S ₂ ) to the mixed water supply passageway (8), Each sensor (21),
(22), (24), and detection information of the water amount detection means (20)
Input (T ₁ ), (T ₂ ), (T ₃ ), (S ₂ ), and A hot water supply apparatus provided with a computing means for calculating the hot water supply amount (Q ₂ ) in the second hot water supply passage (3B) on the downstream side of the connection point of the mixed water supply passage (8).