JP2522130B2 - How to determine the use of other plugs for a water heater with an automatic bath drop function - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining whether or not a hot-water tap other than the automatic drop is used in a water heater with a bath automatic drop-down function capable of automatically dropping a bath in addition to general hot water. Regarding

[0002]

2. Description of the Related Art A conventional method for determining the use of another plug of a water heater with a bath automatic dropping function will be described with reference to FIG. FIG. 2 is a simplified diagram showing an example of a water heater with an automatic bath drop function. The water supplied through the water inlet pipe 1 enters the heat exchanger 2 and is heated, and is discharged to the hot water outlet pipe 3. Then, the hot water supply pipe 3 is branched into the general hot water supply pipe 4 and the automatic bath drop pipe 5, and the general hot water supply and the automatic bath drop are performed, respectively. A water supply amount sensor 6 is provided in the water inlet pipe 1, and a water drop sensor 7 is provided in the bath automatic water drop pipe 5. In such a water heater, conventionally, it is determined whether or not another plug is used during the automatic bath drop (whether the hot water supply run is opened or closed on the general hot water supply side) by the water amount detected by the water supply amount sensor 6 and the drop water amount sensor 7. The amount of water detected by the controller was compared with a controller (not shown), and when the amount of dropped water <the amount of supplied water, it was determined that the other plug was used.

[0003]

However, the bypass pipe 8 for mixing is connected to the water supply amount sensor 6 of the water inlet pipe 1.
When branching from the upstream side and connecting to the hot water outlet pipe 3, there is water that goes through the bypass pipe 8 to the drop water amount sensor 7 side without passing through the water supply amount sensor 6, so However, there is a problem that the other plug usage cannot be simply determined by the above method. In addition, the necessity of other plug use judgment,
This is especially important for water heaters that have a mechanism that prioritizes general hot water supply when there is general hot water supply during the automatic bath drop.

Therefore, the present invention solves the drawbacks of the conventional method of determining the use of the other plug of the water heater with the automatic bath drop function, and even when the mixing bypass pipe is provided on the way, the other plug is used during the automatic bath drop. It is an object of the present invention to provide a method for determining the use of other plugs of a water heater with a bath automatic drop-in function that can reliably determine the presence or absence of a bath.

[0005]

In order to achieve the above object, the method of determining the use of the other plug of the water heater with the automatic bath drop function according to the present invention is to use the heat exchanger 43 to supply the water supplied through the water inlet pipe 41. was tapped into the hot water pipe 44 without heating or heating, by branching the said output Phyllanthus emblica 44 generally hot water supply pipe 60 side and the bath automatic darken tube 70 side, allow also automatically bath darken in addition to the general water heater In addition, a water heater with an automatic bath drop function, in which the mixing bypass pipe 50 is connected to the hot water outlet pipe 44 from a position upstream of the water supply amount sensor 46 of the water inlet pipe 41 so that water can be mixed. in a method for determining the presence or absence of use of other water tap 61 except darken the automatic, the controller 90
In the bath automatic drop operation, drop the unheated water.
While the bath is being dropped, the mixing control valve 51 of the bypass pipe 50 is closed, and the amount of water detected by the water supply amount sensor 46 provided in the water inlet pipe 41 and the bath automatic drop pipe 70 are provided. Comparison with the amount of water detected by the drop water amount sensor 73
However, the amount of water detected by the water supply amount sensor 46 drops.
When the amount of water is larger than the amount of water detected by the water amount sensor 73,
It is determined that the other hot water tap 61 is used and the bath is automatically dropped.
Temporarily stop the running operation and prioritize the temperature control of general hot water
It is characterized by causing.

[0006]

According to the features of the present invention, the bath is automatically dropped.
A bath where only unheated water was dropped during the operation
The controller 90
The mixing control valve 51 of the bypass pipe 50 is closed.
The water supply amount sensor 46 provided in the water inlet pipe 41 detects
Amount of water to be dropped and the drop provided in the automatic bath drop pipe 70.
The amount of water detected by the trapped water amount sensor 73 is compared.
It And the amount of water detected by the water supply sensor 46 drops
When the amount of water is larger than the amount of water detected by the water amount sensor 73
Is judged to be using the other hot water tap 61, and the bath is automatically turned off.
The run-in operation is temporarily stopped, and hot water supply
The temperature control of hot water is given priority. Of course, the water supply sensor 46
The amount of water discharged falls and the amount of water detected by the water amount sensor 73
If it is the same as, it is determined that the other hot water tap 61 is not used.
The bath is warmed down and the operation is continued. The present invention
According to the above, the mixing bypass pipe 50 is connected to the water intake pipe 41.
Branches from the upstream side of the water supply amount sensor 46 to the hot water outlet pipe 44 side
In the water heater connected to the
Even if the other hot water tap 61 is used, the other tap
It is possible to make a reliable decision on the use and prioritize general hot water supply.
It Therefore, the general hot water supply is opened during the operation of dropping the bath
Even if it is started, it is possible to
You can do hot water.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is an overall configuration diagram of a water heater with an automatic bath drop function that implements the method of the present invention.

The bath water of the bathtub 10 is circulated from the circulation fitting 11 through the bath return pipe 31, to the bath heat exchanger 23 by the circulation pump 21, and through the bath outgoing pipe 32 from the circulation fitting 11 into the bath 10. Return to. The bath return pipe 31 and the bath return pipe 32 form a circulation path. The bath return pipe 3 leading to the bath heat exchanger 23 on the downstream side of the circulation pump 21.
1 is provided with a bath water quantity switch 26, and the bath burner 2 is provided only when the quantity of water passing through the water quantity switch 26 is above a certain level.
2 is ignited. 27 is a bath temperature sensor. 28 is a blower fan.

Reference numeral 43 is a heat exchanger for hot water supply, 42 is its burner, and 48 is its blower fan. The supplied water enters the hot water supply heat exchanger 43 through the water inlet pipe 41 and is heated or discharged to the hot water outlet pipe 44 without being heated. The water inlet pipe 41 is provided with a water governor 45, a water supply amount sensor 46, and a water inlet temperature sensor 47. Also, the tap pipe 44
A hot water temperature sensor 49 is provided in the. On the other hand, a bypass pipe 50 for mixing is branched from an upstream side of the water supply amount sensor 46 of the water inlet pipe 41 and connected to the hot water outlet pipe 44. Reference numeral 51 is a mixing control valve. The hot water supply pipe 44 and the general automatic hot water supply pipe 60 and the automatic bath drop pipe 70 are provided downstream of the point where the bypass pipe 50 is connected.
It has been branched to. At the end on the side of the general hot water supply pipe 60, one to a plurality of general hot water supply taps (currants) 61 are provided.
On the other hand, the water sent to the bath automatic drop pipe 70 is
It is sent to the bath return pipe 31 via the drop-in valve 71 and the three-way switching valve 72 so that it can be automatically dropped into the bathtub 10. The automatic bath drop pipe 70
A drop water amount sensor 73 is provided at. Fuel gas is supplied to each of the burners 22 and 42 through a gas pipe 80. Of course, the liquid fuel may be supplied and the burner for the liquid fuel may perform combustion. Reference numeral 90 denotes a controller, which has a built-in microcomputer, receives information from a sensor of each part of the device and a command from a remote controller (not shown), and issues a predetermined operation command to each part of the device.

Now, for example, when a bath warming (lowering the temperature) drop operation switch on the remote controller is turned on, the controller 90 turns on the bath automatic drop switch to open the drop valve 71 and switch between three directions. The valve 72 is switched to the bath side. Then, the mixing control valve 51 is closed. Of course burner 42 because the bath lukewarm darken is operated is placed in a stopped state of combustion. All the water that has entered the water inlet pipe 41 is not heated through the hot water supply heat exchanger 43 , that is, is not heated.
The cold water in the state comes out to the tap pipe 44. Of course, when the automatic drop operation of the hot water at a constant temperature is performed, the burner 42 is burned, and the combustion is controlled so that the hot water discharge temperature becomes the drop temperature.

When the hot water supply tap 61 on the general hot water supply pipe 60 side is opened during the automatic bath drop and the hot water supply is started, the controller 90 stops the automatic bath drop and gives priority to the general hot water supply. In this case, it is necessary to determine whether or not the general hot water supply is started during the automatic bath hot water supply, and this determination method will be described below.

Now, while the operation switch for automatically dropping the bath is on, the controller 90 controls the water inlet pipe 4
The amount of water detected by the water supply amount sensor 46 provided in No. 1 and the amount of water detected by the drop water amount sensor 73 provided in the bath automatic drop pipe are input, and both are compared. Since the mixing control valve 51 is closed during the operation of automatically dropping the bath, when a hot water tap on the side of the general hot water supply pipe 60 other than the automatic dropping is used, a small amount of water corresponding to the amount of other plugs is used for the automatic dropping pipe 70. It will flow. Therefore, if the water amount detected by the water supply amount sensor 46> the water amount detected by the drop water amount sensor 73, the controller 90 determines that the other plug is used. In this case, the automatic dropping is temporarily stopped and the general hot water supply is given priority. To be given priority means that the hot water supply is adjusted to reach the temperature set as the general hot water supply. On the other hand, the amount of water detected by the water supply amount sensor 46 = the amount of dropped water sensor 7
If the amount of water detected is 3, it is determined that no other plug is used, and the dropping is continued.

[0013]

According to the method of judging the use of the other plug of the water heater with the automatic bath drop function according to the first aspect of the present invention, the water supply amount sensor 46 of the water inlet pipe 41 is provided.
The bypass pipe 50 for mixing from the upstream position
An automatic bath drop that is connected to the tap pipe 44 to allow mixed water
For water heaters with a built-in function,
It is a method to determine whether or not the other hot water tap 61 is used.
Then, by the controller 90
In the bath, the bath was made warm by dropping unheated water.
During the filling, the mixing control valve 51 of the bypass pipe 50 is closed, and the water amount detected by the water supply amount sensor 46 provided in the water inlet pipe 41 and the drop water amount sensor 7 provided in the bath automatic drop pipe 70 are detected.
Third detection to compare the amount of water, the water supply amount sensor 46
The amount of water detected falls and the amount of water detected by the water amount sensor 73
If it is larger than the amount, it is determined that the other hot water tap 61 is used.
Automatically stop the automatic bath drop operation, and
One since the temperature control of the general hot water so that priority is given, Mi
A water supply amount sensor for the water intake pipe 41 is provided with the bypass pipe 50 for mixing.
A supply branched from the upstream of 46 and connected to the tap pipe 44 side
In the hot water dispenser, another hot water tap while the bath is warmed down
Make sure to use other stoppers even if 61 is used
It is possible to determine and give priority to general hot water supply. Therefore the wind
When general hot water supply is started during operation
However, be sure to supply general hot water at the specified set temperature.
Can be.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a water heater with an automatic bath drop function in which the method of the present invention is implemented.

FIG. 2 is a diagram illustrating a conventional example.

[Explanation of symbols]

10 Bathtub 41 Water inlet pipe 43 Hot water supply heat exchanger 44 Hot water outlet pipe 46 Water supply amount sensor 47 Water inlet temperature sensor 49 Hot water temperature sensor 50 Bypass pipe 51 Mixing control valve 60 General hot water pipe 61 General hot water tap 70 Bath automatic drop pipe 71 Drop valve 73 Water drop sensor 90 controller

Claims (1)

(57) [Claims] 1. A water supplied through the water inlet pipe 41 is heated by the heat exchanger 43 or by hot water to hot water pipe 44 without heating, generally hot water supply pipe 60 side and the bath automatically darken tube said output Phyllanthus emblica 44 By branching to the side of 70 , not only general hot water supply but also automatic dropping of the bath can be performed, and the mixing bypass pipe 50 is provided from a position upstream of the water supply amount sensor 46 of the water supply pipe 41. A method for determining whether or not a hot water tap 61 other than the automatic drop function is used in a water heater with a bath automatic drop function that is connected to the hot water supply pipe 44 and is capable of mixing water by a controller 90.
In the bath automatic drop operation, drop the unheated water.
While the bath is being dropped, the mixing control valve 51 of the bypass pipe 50 is closed, and the amount of water detected by the water supply amount sensor 46 provided in the water inlet pipe 41 and the bath automatic drop pipe 70 are provided. Comparison with the amount of water detected by the drop water amount sensor 73
However, the amount of water detected by the water supply amount sensor 46 drops.
When the amount of water is larger than the amount of water detected by the water amount sensor 73,
It is determined that the other hot water tap 61 is used and the bath is automatically dropped.
Temporarily stop the running operation and prioritize the temperature control of general hot water
A method of determining the use of other plugs of a water heater with an automatic bath drop function, which is characterized by being able to do so.