JPH05302752A - Automatic drainage and additional boiling type hot water supplying apparatus - Google Patents

Abstract

PURPOSE:To cause an additional boiling type hot water supplying apparatus to have functions of automatic hot water feeding, additional hot water, keeping hot water temperature, replacing hot water feeding and drainage. CONSTITUTION:A heat exchanger 2 is installed inside a boiler 1 for a hot water supplying apparatus. A bath tub 3 and a heat exchanger 2 are connected by an upper circulation pipe 4 and a lower circulation pipe 5 having a circulation pump 6 fixed thereto. The first three-way valve 7 and the second three-way valve 9 are arranged with the circulation pump 6 held therebetween in the midway of the upper circulating pipe 4, and the first three-way valve 7 is connected at one end thereof to a hot water feeding pipe 8 of the hot water supplying apparatus. The second three-way valve 9 is connected at one side to a drain pipe 10 and at the same time one end of the lower circulation pipe 5 is connected to a lower bottom part of a bath tub 3. An automatic hot water feeding, adding of hot water, keeping of hot water temperature, replacing of the hot water feeding and drainage are carried out under each of the operations of the operation switch, the hot water feeding switch and the drainage switch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to hot water beam, reheating,
The present invention relates to a water heater that automatically performs each drainage operation.

[0002]

2. Description of the Related Art A reheating heat exchanger is provided in a can for storing hot water for hot water supply, and a bathtub and a reheating heat exchanger are connected by an upper and lower circulation pipes equipped with a circulation pump. A circulation pump circulates between the heat exchanger for reheating and the bath to reheat it, and also connects the hot water supply pipe branched from the hot water discharge pipe of the can body with a three-way valve provided in the middle of the circulation pipe. There is known a water heater that has both a hot water reheating function and a hot water supplying function for supplying hot water from a can body.

Further, in this kind of water heater, a water level switch is attached to the circulation pipe, the operation of the three-way valve is automated, and after hot water is supplied to the bathtub and heated at a constant water level, the hot water supply is stopped and followed. A fully automatic water heater that keeps you warm by the heating function is also known as a high-end model.

[0004]

SUMMARY OF THE INVENTION The present invention further enhances the latter high-end model (high-priced product) of the above-mentioned prior arts, and does not remove the drain plug one by one, but operates the switch to operate the bathtub. This is to answer the customer's request to replace the hot water when it becomes dirty and to drain the water at the end of bathing.

[0005]

In order to solve the above-mentioned problems, the present invention provides a reheating heat exchanger 2 for exchanging heat with the hot water of the can body 1 inside the can body 1 for storing hot water for hot water supply. Provided,
A vertical circulation pipe 4 is provided between the heat exchanger 2 for reheating and the bath 3.
And the lower circulation pipe 5 is connected to the lower bottom portion of the bathtub 3, and the upper and lower circulation pipes 4 and 5 on the suction side of the circulation pump 6 are provided with the first three-way valve 7. The hot water supply pipe 8 of the can body 1 is connected to the first three-way valve 7, the second three-way valve 9 is provided between the circulation pump 6 of the upper circulation pipe 4 and the bath 3, and the drain pipe 10 is connected to the second three-way valve. This is an automatic drainage and reheating type hot water supply device that is connected to the valve 9 and switches the second three-way valve 9 to the drainage pipe 10 to operate the circulation pump to drain the water.

A drainage port 3a is provided at the bottom of the bathtub 3, and a drainage pipe 11 connected to the drainage port 3a is connected to the second three-way valve 9.
It is an automatic drainage and reheating type hot water supply device that can be combined with the drainage pipe 10 connected to the above to simplify the drainage facility.

Further, a bathtub 3 is provided in the middle of the upper and lower circulation pipes 4 and 5.
With a water level switch 12 that detects when the water is full and when it is empty, and a thermistor 13 that detects the temperature of the hot water It was done.

[0008]

When the hot water supply device according to the present invention is in operation, the inside of the can body 1 is filled with high-temperature hot water, and when the hot water beam switch is turned on, the first three-way valve 7 is switched to circulate upward from the hot water supply pipe 8. When the open circuit of the pipe 4 is opened, the hot water of the can body 1 is sent to the bathtub 3, and when the water level switch 12 detects an appropriate water level in the bathtub 3, the first
The three-way valve 7 is switched, and the circulation circuit of the reheating heat exchanger 2 is opened.

When the circulation pump 6 is operated in this state, the hot water in the bathtub 3 can be circulated and boiled up by the upper and lower circulation pipes 4 and 5 to the reheating heat exchanger 2. At this time, the circulation pump 6 is operated such that the thermistor 13 detects the temperature of the circulating hot water and repeats the ON-OFF operation at any time. Further, the increase / decrease of hot water in the bathtub 3 can be detected by the water level switch 12, and the switching of the first three-way valve 7 is performed at any time, so that a required amount of hot water is supplied from the hot water supply pipe 8.

Next, when the hot water in the bathtub 3 is to be drained, the lower circulation pipe 5 is connected to the lower bottom portion of the bathtub 3. Therefore, when the drain switch is turned on, the second three-way valve 9 is switched to the upper circulation pipe. Since the route 4 is switched to the drain pipe 10, the hot water in the bathtub is drained by operating the circulation pump 6.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described below with reference to the drawings showing an embodiment. Reference numeral 1 is a can body of a water heater, which is a water supply pipe 14 directly connected to a water pipe.
The hot water that has been supplied more and heated to a high temperature by the burner is tapped by the tap pipe 15. Reference numeral 2 denotes a heat exchanger for reheating which is installed in the can body 1 in a coil shape, and communicates with a tub 3 provided at a distant position through upper and lower circulation pipes 4 and 5, and one end of the lower circulation pipe 5. Is connected to the lower bottom of the bathtub 3.

Reference numeral 6 is a circulation pump provided in the middle of an upper circulation pipe 4 which constitutes a going pipe to the bathtub 3, and hot water in the bathtub 3 is fed from a lower circulation pipe 5 which constitutes a return pipe to the reheating heat exchanger 2 And is circulated from the upper circulation pipe 4 to the bathtub 3, and the hot water in the can body 1 reheats the hot water in the bathtub 3.

Reference numeral 7 is a reheating heat exchanger 2 and a circulation pump 6.
In the first three-way valve provided in the middle of the upper circulation pipe 4 between, the first three-way valve 7 is connected to the hot water supply pipe 8 that branches from the hot water discharge pipe 15 through the mixing plug 16 to mix hot water and water. The hot water having an appropriate temperature flows from the hot water supply pipe 8 to the upper circulation pipe 4 by the switching of the first three-way valve 7, and the hot water is sent to the bathtub 3 by the circulation pump 6.

As for the mounting position of the first three-way valve 7, if it is on the suction side of the circulation pump 6, it is mounted on the reheating heat exchanger 2 side of the lower circulation pipe 5 connected to the reheating heat exchanger 2. In some cases, the hot water supply operation is the same.

Reference numeral 9 is a second three-way valve provided in the upper circulation pipe 4 between the circulation pump 6 and the bath 3 and has one side connected to the drain pipe 10. A drain pipe 11 is connected to a drain port 3a provided at the bottom of the bathtub 3, and both drain pipes 10 and 11 are joined to simplify the drain facility.

Reference numeral 12 is a water level switch for detecting whether the bath water is full or empty, which is attached to the lower circulation pipe 5 in the embodiment. When the empty water or the water level is detected, the first three-way valve 7 is connected to the hot water supply pipe. Switch to the 8 side to send hot water to the bathtub 3, and when full, switch to the reheating heat exchanger 2 side to perform the reheating operation.

Reference numeral 13 denotes a thermistor provided in the middle of the circulation pipe, which controls ON / OFF of the circulation pump 6 in order to control the temperature of the circulating hot water to an arbitrary temperature.

As shown in the time chart of FIG. 2, the burner operation / circulation pump 6 is operated by operating the operation switch 17.
Operate driving. In addition, when the water level switch 12 is detecting empty water, the hot water beam operation switches the first three-way valve 7 to the side of the hot water supply pipe 8 to supply the hot water of the can body 1 to the bathtub 3, and when the full water is detected, the first The three-way valve 7 switches to the circulation path of the reheating heat exchanger 2. When the thermistor 13 detects a low temperature, the circulation pump 6 is operated to reheat the hot water in the bathtub, and when a high temperature is detected, the circulation pump 6 is stopped to maintain the heat.

In the hot water replacement operation, the hot water replacement switch 18 is turned on, the second three-way valve 9 is switched to the drain pipe 10 side, and the circulation pump 6 is operated to drain hot water from the bathtub. Next, when the water level switch 12 detects a decrease in the water level, the first three-way valve 7 is switched to the hot water supply pipe 8 side, hot water is removed, and after full water is detected, the operation is the same as that of hot water.

On the other hand, for drainage operation, the drainage switch 19 is turned on.
Then, the second three-way valve 9 is switched to the drain pipe 10 side to operate the circulation pump 6, and when the water becomes empty, the second three-way valve 9 is switched to the circulation path side, the circulation pump 6 is turned off, and the operation switch 17 is turned off. Circuit configuration.

[0021]

The present invention has the above-described structure and operation. The lower circulation pipe 5 is connected to the lower bottom of the bath 3 while the upper circulation pipe 4 is intermediate between the circulation pump 6 and the bath 3. When the drain switch 19 is turned on while the circulation pump 6 is operating, the second three-way valve 9 is switched to the drain pipe 10 side, so that the hot water in the bathtub is drained from the upper circulation pipe 4. Tube 1
There is an advantage that it can be drained without draining the drain plug etc.

The drain pipe 11 connected to the drain port 3a
And the drainage pipe 10 connected to the second three-way valve 9 are merged and integrated, so that there is an advantage that the drainage facility can be simplified.

If a water level switch 12 for detecting when the bathtub 3 is full and when it is empty and a thermistor 13 for detecting the hot water temperature are provided in the middle of the circulation pipe, hot water and hot water are supplied to the bathtub 3. -It is convenient because it can automatically perform all the heat retention and drainage operations.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a time chart diagram for explaining the operation of the present invention.

[Explanation of symbols]

 1 can body 2 heat exchanger for reheating 3 bathtub 4 upper circulation pipe 5 lower circulation pipe 6 circulation pump 7 first three-way valve 8 hot water supply pipe 9 second three-way valve 10 drain pipe 11 drain pipe 12 water level switch 13 thermistor

Claims (3)

[Claims] 1. A reheating heat exchanger 2 for exchanging heat with the hot water of the can body 1 is provided inside a can body 1 for storing hot water for hot water supply, and between the reheating heat exchanger 2 and the bathtub 3. Is connected to the upper and lower circulation pipes 4 and 5 via the circulation pump 6, the lower circulation pipe 5 is connected to the lower bottom portion of the bathtub 3, and the upper and lower circulation pipes 4 and 5 on the suction side of the circulation pump 6 are connected to A three-way valve 7 is provided, the hot water supply pipe 8 of the can body 1 is connected to the first three-way valve 7, and a second three-way valve 9 is provided between the circulation pump 6 of the upper circulation pipe 4 and the bathtub 3 for drainage. An automatic drainage-and-fired water heater that connects a pipe 10 to a second three-way valve 9, switches the second three-way valve 9 to a drain pipe 10, and operates a circulation pump to drain water. 2. A drainage port 3a is provided at the bottom bottom of the bathtub 3,
An automatic drainage and reheating type hot water supply device, in which the drainage pipe 11 connected to the drainage port 3a is joined to the drainage pipe 10 connected to the second three-way valve 9. 3. The automatic drainage according to claim 1, further comprising a water level switch 12 for detecting when the bathtub 3 is full and empty, and a thermistor 13 for detecting hot water temperature, provided in the middle of the upper and lower circulation pipes 4, 5. An additional hot water heater.