JP3185412B2 - Water heater with mist heating 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 hot water supply apparatus, and more particularly to a hot water supply apparatus capable of exhibiting a mist heating function.

[0002]

2. Description of the Related Art Conventionally, there has been provided an apparatus for performing hot water heating in addition to bath heating using an apparatus having a high-temperature water circulation heating piping system such as a bath kettle apparatus. However, there has not been provided any device that also performs mist heating using a water heater that only supplies hot water unilaterally.

[0003]

When the inventors tried to add a mist heating function to a general hot water supply function using a water heater, when the mist heating operation was simultaneously performed during the hot water supply operation, the mist was ejected. Also, the temperature of the mist becomes the hot water supply set temperature, so that there is a problem that unless the hot water supply operation itself is performed at a high temperature, the heating effect by the mist cannot be substantially obtained. This is because mist heating requires the ejection of mist at about 80 ° C, and below that, the heating effect cannot be expected much.

Accordingly, the present invention solves the above-mentioned problems,
It is an object of the present invention to provide a hot water supply apparatus with a mist heating function that can perform a normal hot water supply operation and a mist heating operation freely as well as a normal hot water supply operation as well as the mist heating operation alone.

[0005]

Means for Solving the Problems To achieve the above object, a hot water supply device with mist heating function of the present invention comprises: a water inlet pipe;
A heat exchanger for heating water from the inlet pipe, a tapping pipe for tapping hot water heated by the heat exchanger, a mixing pipe connected in the middle of the tapping pipe, and a connection point of the mixing pipe. A mist heating pipe branched from an upstream tapping pipe, a check valve provided in a tapping pipe between a branch point of the mist heating pipe and a connection point of the mixing pipe, and at least mist heating and hot water supply. And a control unit for adjusting the flow control valve of the water mixing pipe so that the heat exchanger performs a constant high-temperature hot water supply and the temperature after mixing with the hot water supply set temperature during the simultaneous operation. I have.

[0006]

According to the feature of the present invention, when simultaneous operation of hot water supply and mist heating is performed, high temperature water of a certain temperature is discharged from the heat exchanger to the hot water pipe by the control unit, and the high temperature water is discharged. A part of the mist flows into the mist heating pipe, and is sprayed from the mist nozzle at the end. On the other hand, the high-temperature water that has flowed without branching the tapping pipe to the mist heating pipe side is temperature-controlled by water from the mixing pipe that is adjusted and supplied by the control unit, and becomes hot water at the set hot-water supply temperature to supply hot water. Provided. When only mist heating is operated, of course, constant high-temperature water is supplied from the heat exchanger. Also in the case of the hot water supply operation alone, the above-mentioned constant high-temperature water is supplied, and the hot water supply set temperature is adjusted by the water from the water mixing pipe. However, of course, in the case of hot water supply alone, hot water at the set hot water supply temperature may be discharged from the heat exchanger from the beginning.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the drawings. FIG. 1 is an overall configuration diagram of a device in which a hot water supply device and a bath kettle device are combined according to an embodiment of the present invention, and FIG. 2 is a flowchart illustrating a control operation performed by a control unit during a simultaneous operation of a mist heating operation and a hot water supply operation. .

On the hot water supply device side, a water inlet pipe 10, an instantaneous heat exchanger 20, a hot water pipe 30, a mist heating pipe 40 branched from the hot water pipe 30, and a hot water pipe branched from the water inlet pipe 10. A water mixing pipe 50 serving as a bypass pipe connected to 30, a general hot water supply pipe 60 connected to the tip side of the tapping pipe 30, and an automatic bath water supply pipe 70 are provided. The water inlet pipe 10 is provided with an incoming water flow rate sensor 11 and an incoming water temperature sensor 12, a burner 21 is provided for the instantaneous heat exchanger 20, and a mist heating pipe 40 branches off from the hot water pipe 30. A tapping temperature sensor 31 is provided upstream of the point, and a check valve 32 is provided between a point where the mist heating pipe 40 branches and a point where the mixing pipe 50 is connected.
Is provided, and a hot water supply control valve 33 and a mixed water temperature sensor 34 are provided downstream from a point where the mixed water pipe 50 is connected. The backflow prevention valve 32 prevents water and the like that have joined from the mixing pipe 50 from flowing back into the mist heating pipe 40 side. The mist heating pipe 40 is provided with an electromagnetic on-off valve 41 and a mist nozzle 42 at the end, and the water mixing pipe 50 is provided with a flow control valve 51.

The general hot water supply pipe 60 is provided with a hot water supply curl (not shown) at its end. In addition, the bath automatic hot water supply pipe 70
There is a flow sensor 71 that detects the automatic hot water supply amount, a drop valve
A three-way valve 76 connects the two passages 74 and 75 via a hopper 73 to a bath reheating circuit 80 on the side of the bath kettle device.

On the side of the bath kettle apparatus, the bath reheating circuit 80 is provided between a bathtub 81 and a reheating heat exchanger 82, and a circulation pump 83 and the like are provided on the way.

Reference numeral 90 denotes a control unit of the apparatus, which inputs information from each sensor based on a command from a remote control 100 for a hot water supply apparatus or a remote control 110 for a bath pot apparatus, and issues a predetermined control command to each member. Output. The remote controller 100 for the hot water supply device is provided with a mist heating operation switch and a bath automatic hot water supply operation switch, and is provided with a set temperature adjustment knob for hot water supply operation. The bath automatic hot water supply operation switch can also be provided on the remote control 110 for the bath kettle device.

An example of the control of the water heater by the control unit 90 is as follows.
A case where the mist heating operation and the hot water supply operation are performed simultaneously will be described with reference to the flowchart of FIG. now,
The hot water supply operation is carried out and the remote control 10 is turned on by opening the unillustrated curan of the general hot water supply pipe 60 or turning on the automatic bath water supply operation switch of the remote controllers 100 and 110.
0 mist heating operation switch is on (S
1) Yes, the mist heating pipe by the control unit 90
The solenoid on-off valve 41 is opened (S2), and the heat exchanger 20 is opened.
The amount of combustion of the burner 21 is adjusted so that the hot water from the furnace becomes hot water of 80 ° C. (S3). Adjustment of the combustion amount of the burner 21 is performed by the control unit 90 calculating the required heat quantity from the incoming water temperature by the incoming water temperature sensor 12, the predetermined constant hot water outlet temperature of 80 ° C. and the incoming water amount by the incoming water flow rate sensor 11, The fuel supply can be controlled by controlling a fuel supply regulator (not shown) to the burner 21 so that the amount of fuel to be supplied is controlled. As a result, the water from the water inlet pipe 10 is heated by the heat exchanger 20 to high-temperature water at 80 ° C., and is discharged to the hot water outlet pipe 30. Then, a part thereof branches and flows into the mist heating pipe 40 and is sprayed from the mist nozzle 42 as a high-temperature mist. The heating by spraying the high-temperature mist can be performed, for example, on a bathroom.

Further, the control unit 90 controls the mixed water temperature sensor 34.
And temperature control is performed by adjusting the flow control valve 51 of the mixing pipe 50 so that the detected temperature becomes the preset hot water supply temperature (S4, S5).

The callan of the general hot water supply pipe 60 is closed,
And when the mist heating operation switch is turned on while the bath automatic hot water supply operation switch is off, that is,
Even in the case of the mist heating operation alone, the control unit 90 controls the combustion amount of the burner 21 so that the electromagnetic on-off valve 41 of the mist heating pipe 40 is opened and the hot water from the heat exchanger 20 is a high-temperature hot water of 80 ° C. Adjust Of course, hot water does not flow through the tap water pipe 30, the general hot water supply pipe 60, and the automatic bath water supply pipe 70 downstream of the branch point of the mist heating pipe 40, so that no water flows through the water mixing pipe 50, and the flow control valve 51 Is also not adjusted. On the other hand, when the mist heating operation switch is in the off state, the callan of the general hot water supply pipe 60 is opened,
When the bath automatic hot water supply operation switch is turned on, similarly, the control unit 90 adjusts the combustion amount of the burner 21 so that the hot water from the heat exchanger 20 becomes hot water at 80 ° C. The flow control valve 51 is adjusted to adjust the set hot water supply temperature. But,
In the case of this hot water supply operation alone, software of the control unit 90 may be set up so that hot water at the set hot water supply temperature is discharged from the heat exchanger 20 from the beginning.

[0015]

According to the present invention, there is provided the above construction.
According to the hot water supply device with mist heating function described in the above, since the hot water supplied to the mist heating pipe can always be high-temperature water, even during simultaneous operation with the hot water supply operation, it is possible to ensure effective mist heating It can be carried out. Of course, even in the hot water supply operation during the simultaneous operation with the mist heating operation, the set hot water supply temperature can be reliably obtained by adjusting the mixed water. As a result of these effects, the mist heating function can be added to the hot water supply device without any trouble.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an apparatus in which a hot water supply apparatus and a bath kettle apparatus according to an embodiment of the present invention are combined.

FIG. 2 is a flowchart illustrating a control operation performed by a control unit during a simultaneous operation of a mist heating operation and a hot water supply operation.

[Explanation of symbols]

 10 Inlet pipe 20 Instantaneous heat exchanger 30 Hot water pipe 32 Check valve 40 Mist heating pipe 50 Water mixing pipe 51 Flow control valve 90 Control unit

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroki Ohara 32nd Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Pref. (72) Inventor Saichiro Hato 32nd Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Pref. 72) Inventor Masami Tani, 32, Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture, Japan (72) Inventor Isao Aoki 32, Akashi-cho, Chuo-ku, Kobe, Hyogo, Japan Noritsu, Ltd. (58) Cl. ⁷ , DB name) F24H 1/10 301 F24H 1/10 302

Claims (1)

(57) [Claims] 1. A water inlet pipe, a heat exchanger for heating water from the water inlet pipe, a hot water pipe for hot water heated by the heat exchanger, and a mixed water pipe connected in the middle of the hot water pipe. A mist heating pipe branched from a tapping pipe upstream of a connection point of the mixing pipe, and a backflow provided at a tapping pipe between a branch point of the mist heating pipe and a connection point of the mixing pipe. The prevention valve and at least during the simultaneous operation of mist heating and hot water supply, make the heat exchanger perform a constant high-temperature hot water supply, and adjust the flow control valve of the water mixing pipe so that the temperature after water mixing becomes the hot water supply set temperature. A hot water supply device with a mist heating function, comprising: a control unit.