JPH0759985B2 - Fully automatic bath kettle with heating function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention shares a heat exchanger and a circulation pump in a heating circuit and a bath heating circuit, and performs heating or a bath heating function by switching a flow path. About full automatic bath kettle.

[Prior art]

Conventionally, a heating circuit and a bath heating circuit are connected to a heating circuit having one heat exchanger and one circulation pump via a switching valve, and the switching valve is operated to switch the flow path to use a circulation pump. There is known a bath pot with a heating function (for example, see Japanese Patent Laid-Open No. 60-33448) that heats or reheats a bath by forcibly circulating it.

In such a bath with heating function, when adding an automatic drop function to automatically fill the bath with hot water, connect the drop hot water supply passage to the pipe between the switching valve and the suction side of the circulation pump, Hot water was supplied to the bathtub via a circulation pump and a heating circuit.

[Problems to be Solved by the Invention]

However, in the conventional bathtub with a heating function having the automatic dropping function, since the dropping hot water supply passage is connected to the pipe line between the switching valve and the suction side of the circulation pump, the circulation pump and the heating circuit are provided. In addition, there is a problem that heating operation cannot be performed while hot water is being supplied to the bathtub after being dropped.

An object of the present invention is to solve the above problems and to add an automatic dropping function to a fully automatic bath kettle with a heating function that shares a heat exchanger and a circulation pump in a heating circuit and a bath heating circuit to perform heating operation and automatic dropping. It is to provide a fully-automatic bathtub with a heating function that can perform both and at the same time.

[Means for Solving the Problems]

In order to achieve the above object, the fully automatic bath heater with a heating function of the present invention connects a heating circuit and a bath reheating circuit to a heating circuit having a heat exchanger and a circulation pump via a switching valve, and a switching valve is provided. In the fully-automatic bathtub with heating function that performs heating operation or bath reheating operation by switching the flow path by operation and forcibly circulating with the circulation pump, the drop hot water supply pipe line is the bath return pipe line via the three-way switching valve. The first bypass passage and the second bypass passage are branched from the outlet side of the three-way switching valve, the first bypass passage is connected to the bath return pipeline, and the second bypass passage is connected to the bath outgoing pipeline. In addition to being connected, a check valve is provided in the first bypass passage to allow flow only from the outlet side of the three-way switching valve to the bath return pipeline, and the second bypass passage is provided with a bath outlet pipe from the outlet side of the three-way switching valve. Allow distribution only to the road It is provided with a check valve.

[Action]

In the fully-automatic bathtub with heating function of the present invention configured as described above, hot water is dropped from the hot water supply pipe line through the three-way switching valve and the first bypass line and the second bypass line during the drop-in operation.
Since the hot water is supplied to the bypass passage and the hot water is supplied to the bathtub from the first bypass passage and the bath return pipeline from the second bypass passage, respectively, the drop operation and the heating operation can be performed at the same time. is there.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

The fully automatic bathtub 1 with a heating function has a heat exchanger 2, a burner 3 and a combustion fan 4 arranged below the heat exchanger 2, and an ignition plug 191 and a frame rod 192 are provided above the burner 3. And are installed.

The heat exchanger 2 is connected to a hot water outlet passage 21 in which a heating temperature sensor 14 and a high limit switch 15 are arranged, and an inlet passage 22 in which a circulation pump 5 and a water flow switch 13 are arranged. The outlet passage 21 is at the inlet of the first three-way switching valve 61, and the inlet passage 22
Are respectively connected to the outlets of the second three-way switching valve 62.

A heating return pipe 72 is connected to one inlet of the second three-way switching valve 62 via an expansion tank 8 having a water level detection electrode 81, and the other inlet is connected to a third three-way switching valve via a pipe 18. It is connected to 63 outlets.

The heating outflow conduit 71 is connected to one outlet of the first three-way switching valve 61, and the bath outflow conduit 91 is connected to the other outlet.

The bath return pipe 92 having the bath temperature sensor 11 and the water level sensor 12 is connected to one inflow port of the third three-way switching valve 63, and the drop hot water supply pipe line 205 is connected to the other inflow port.

A first bypass passage 16 that connects the pipe 18 connected to the outlet of the third three-way switching valve 63 and the bath return pipe 92 is provided,
A check valve 160 is installed in the first bypass line 16 to flow only from the line 18 to the bath return line 92.

In addition, a second bypass passage 17 that connects the pipeline 18 and the bath-outlet pipeline 91 is provided, and a check valve 170 that allows only the pipe 18 to flow into the bath-outlet pipeline 91 is installed in the second bypass passage 17. Has been done.

Further, a third bypass passage 73 is provided which connects the heating outward pipe 71 and the heating return pipe 72, and an orifice 74 is provided in the third bypass passage 73.

The drop hot water supply pipe line 205 has the drop hot water supply pipe line 204 having a drop water amount sensor 213 via the backflow prevention device 50.
Is connected to the drop water outlet pipe 204, the water heater 1
It is branched from the hot water outlet pipe line 202 of 00.

The water heater 100 has a heat exchanger 200, a burner 300 and a combustion fan 40 arranged below the heat exchanger 200, and an ignition plug 219 and a frame rod 229 are provided above the burner 300. There is.

The heat exchanger 200 includes an incoming water temperature sensor 208 and an incoming water amount sensor.
Inlet 201 with 209 and high limit switch
210, a temperature fuse 211, and a hot water outlet temperature sensor 212 are arranged, and a hot water outlet 202 extending to a hot water supply place is connected.

The burner 3 of the fully-automatic bathtub 1 with a heating function has a capacity switching valve 31, and a gas line 37 allows a main solenoid valve 36 provided on the gas main pipe 30 via a proportional control valve 32 and a solenoid valve 33. The burner 300 of the water heater 100 has the capacity switching valves 301 and 302, and is connected to the original solenoid valve 36 via the proportional control valve 35 and the solenoid valve 34 by the gas pipeline 303.

Backflow prevention device 50 connected to the drop-out tap line 204
Is provided with a drop solenoid valve 500 on the inflow side and a backflow preventive chamber 510 accommodating the first check valve 520 on the outlet side thereof, and an outlet from the backflow preventive chamber 510 is provided by a pipe 531. 2 Check valve 532 is connected.

Further, the valve seat 540 that is opened and closed by the first check valve 520 is a check valve.
It is provided in 510 and communicates with the hopper 550. The drainage channel of the hopper 550 is communicated with the drainage pipeline 502 through the drainage solenoid valve 560, and the drainage pipeline 502 is the outflow side pipeline of the second check valve 532. 50
It is connected to 1 and communicates with the drop hot water supply pipe 205.

Next, the operation will be described. In the heating operation (see arrow F ₁ ), the low-temperature water returning from the radiator (not shown) passes from the heating return pipe 72 through the expansion tank 8 to the second three-way switching valve. Reach one of the 62 inlets.

By switching the second three-way switching valve 62, the heating return pipe line 72 is connected to the water inlet line 22, and the low temperature heating water is sent to the heat exchanger 2 and heated by the circulation pump 5 to become high temperature hot water, and the hot water discharge route. twenty one
Flow into the first three-way switching valve 61 from the outlet of the first three-way switching valve 61 by switching the first three-way switching valve 61.
It flows to 71 and is sent to the radiator.

As shown by the arrow F ₂ , during the bath reheating operation, the bath return pipe 92 to the third three-way switching valve 63 and the pipe
18, second three-way switching valve 62, circulation pump 5, water inlet 22, heat exchanger 2, hot water outlet 21, first three-way switching valve 61, bath outgoing pipe 91
A reheating circuit from the bath to the bathtub 10 is formed.

At this time, by providing the check valve 170 in the second bypass passage 17, it is possible to prevent the flow from the bath-going pipeline 91 to the bath-return pipeline 92 and prevent the occurrence of a short cycle that bypasses the bathtub 10. You can

As shown by an arrow F ₃ , the circuit at the time of dropping into the bathtub 10 has a dropping hot water outlet pipe 204 branched from the hot water outlet pipe 202 of the water heater 100, a backflow prevention device 50, a hot water dropping pipe 205, After passing through the three-way switching valve 63, the pipe 18 is branched into the first bypass passage 16 and the second bypass passage 17.

The first bypass passage 16 having the check valve 160 branched from the pipe 18 is communicated with the bathtub 10 from the bath return pipe 92, and the second bypass passage 17 having the check valve 170 is the bath outgoing pipe 91. It is connected to the.

Therefore, during the drop-in operation, the high-temperature hot water from the drop-in hot water supply conduit 205 is supplied to the bathtub 10 from both the bath outgoing conduit 91 and the bath return conduit 92, and from the second three-way switching valve 62. The circulation pump 5, the water inlet 22, the heat exchanger 2, the hot water outlet 21, and the first three-way switching valve 61 are separated from the heating circuit of the fully-automatic bath kettle 1 with a heating function. It enables simultaneous operation.

Furthermore, when dropping hot water, dropping hot water outlet pipe 20
Since it is dropped from 4 through the backflow prevention device 50 and is discharged to the hot water supply pipe 205, in the backflow prevention device 50, the backflow prevention chamber
Hot water in 510 flows from the valve seat 540 opened and closed by the first check valve 520 into the hopper 550 and is stored therein.

It is necessary to discharge the water in the hopper 550 when the dropping operation is completed, and during the drainage operation from the hopper 550, the drainage provided in the drainage channel from the hopper 550 as shown by the arrow F _4. The solenoid valve 560 is opened, and the drainage line 502 is connected to the outflow side pipe line 501, the drop hot water supply pipe line 205, the third three-way switching valve 63, the pipe line 18, the second three-way switching valve 62, the circulation pump 5, the water inlet line 22, and the heat. The hopper 55 is inserted into the bathtub 10 from the flow passage formed by the exchanger 2, the hot water outlet 21, the first three-way switching valve 61, and the bath outflow conduit 91.
Drain hot water in 0.

At this time, since the check valve 160 is provided in the first bypass passage 16, it is possible to prevent suction of hot water in the bathtub 10 through the bath return pipe passage 92.

As mentioned above, during the drainage operation from the hopper 550,
Since tap water pressure or pump pressure is not applied to the water in the hopper 550, it is necessary to forcibly discharge it with the circulation pump 5, so the second three-way switching valve 62 to the circulation pump 5,
The heating circuit of the fully automatic bath kettle 1 with a heating function up to the water inlet 22, the heat exchanger 2, the hot water outlet 21, and the first three-way switching valve 61 is used.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

During the drop-in operation, hot water is dropped from the hot-water supply line to the first bypass line and the second bypass line through the three-way switching valve, and the bath return line from the first bypass line and the bath-going line from the second bypass line. Since the hot water is supplied to the bathtub via each of them and the circulation pump and the heat exchanger are not used, the drop operation and the heating operation can be performed at the same time.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention. 1 ... Fully automatic bath pot with heating function, 2 ... Heat exchanger, 5 ...
… Pump, 16 …… First bypass line, 17 …… Second bypass line, 61 …… First three-way switching valve, 62 …… Second three-way switching valve, 63
…… Third three-way switching valve, 71 …… Heating return line, 72 …… Heating return line, 91 …… Bath going line, 92 …… Bath return line,
160,170 ... Check valve, 205 ... Drop-in hot water supply pipe line.

Claims (1)

[Claims] 1. A drop-in hot water supply pipe line in a fully automatic bath kettle with a heating function that shares a heat exchanger and a circulation pump with a heating circuit and a bath heating circuit, and performs heating operation or bath heating operation by switching flow paths. Is connected to a bath return pipe via a three-way switching valve, and a first bypass path and a second bypass path each having a check valve are branched from the outlet side of the three-way switching valve to connect the first bypass path. A fully automatic bath kettle with a heating function, characterized in that it is connected to the bath return conduit and the second bypass conduit is connected to the bath outgoing conduit.