JPS5942602Y2 - water heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water supply device for quickly obtaining desired hot water in a bathtub.

BACKGROUND ART Conventionally, in order to boil a bath in a general household, water is supplied into a closed bathtub, and then the water in the bathtub is circulated and heated using a combustion device to obtain the desired hot water.

However, with such a method, it takes time to supply water into the aquarium, and if monitoring is neglected, water may overflow from the bathtub.

Also, because the bathtub is heated by circulation, there is a significant temperature difference between the hot water in the upper and lower parts of the bathtub, making it difficult to mix and obtain properly hot water, resulting in wasted water due to overboiling.

In view of the above-mentioned conventional circumstances, the present invention is designed to supply water while heating it into the bathtub, and to circulate and heat the hot water again to obtain hot water at a predetermined temperature.
To provide a hot water supply device that quickly provides desired hot water in a bathtub and eliminates wastage of hot water due to overboiling or the like.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, 1 is a bathtub installed in a bathroom, 2 is an upper circulation pipe that penetrates the upper side wall of the bathtub 1 and is fixed watertightly;
3 is a lower circulation pipe fixed to the lower part of the side wall of the bathtub 1;
4 is a main body of the water heater, 5 is a second combustor (hereinafter referred to as a central combustor) disposed within the main body 4 of the water heater, and 6 is a tubular second combustor provided corresponding to the upper part of the combustor 5. 2 heat exchanger (hereinafter referred to as central heat exchanger), 7 is a box-shaped heat receiving tank provided above the heat exchanger 6, and one upper end of the central heat exchanger 6 and the upper circulation pipe 2 are connected in communication. Ru.

Reference numeral 8 denotes a howling hot water storage tank provided around the upper part of the combustor 5, and one lower end of the central heat exchanger 6 and the lower circulation pipe 2 are connected in communication.

9 is a heat shield plate for forming a combustion space around the central heat exchanger 6 between the heat receiving tank 7 and the hot water storage tank 8; 9A is a heat shield plate 9;
This is an exhaust port installed in a part of the

On the other hand, 10 is a first combustor (hereinafter referred to as an outer combustor);
1 is an outer heat exchange cylinder provided on the combustor 10 side;
It has a discharge hole A.

12 is this exhaust hole 11A and the exhaust port 9. Exhaust duct communicating with A and penetrating the bathroom wall and opening to the outside, 13
is the first heat exchanger (
The lower end of the heat exchanger (hereinafter referred to as an external heat exchanger) is connected to 15 water supply pipes via 14 pressure reducing valves.

16 is a communication pipe that connects the other upper end of the external heat exchanger 13 and the heat receiving tank 7, and 17 is a flow path selection device provided in the middle of the communication pipe 16, the operation of which will be described later.

A flow switch 18 is interposed between the external heat exchanger 13 and the selection device 17 in the middle of the communication pipe 16.

19 is a hot water supply pipe extending from the selection device 17, and 20 is a hot water tap provided at the tip of this hot water supply pipe 19.

21 is a fuel tank, 22 is a fuel supply device that communicates with this fuel tank 21 and supplies a certain amount of fuel to each of the combustors 5 and 10, and 23 is an electric blower, with one end of the air blower 23A open to the outside on the intake side. The ducts are connected to an air blowing duct 23B on the exhaust side.

On the other hand, numeral 28 is a first water level detector which operates by detecting a water head difference H at a low position in the bathtub 1, i.e. the water level h' at which the amount of hot water stored is insufficient for bathing, and is electrically interlocked with the selection device 17. However, until the water level in the hot water tank 1 becomes high, both combustors 5.1
When hot water is supplied by combustion operation of 0 and the water level reaches h',
It is configured to stop the combustion operation of both combustors 5.10 and stop the hot water supply.

Reference numeral 25 denotes a combustion controller, and its switching operation controls the two combustors 5.10 to operate simultaneously or one of them.

Here, the selection device 17 is equipped with a 17A check valve, and normally connects the external heat exchanger 13 and the hot water supply pipe 19, and depending on the operation of the combustion controller 25, connects the external heat exchanger 13 to the central heat exchanger. It has a function of communicating with the exchanger 6 alone or with both the hot water supply pipe 19 and the central heat exchanger 6.

26 is a temperature sensor provided at a predetermined position of the heat receiving tank 7, which is electrically linked to the fuel supply device 22 and the electric blower 23;
Controls the combustor 5.

29 is a second valve which is activated by detecting a high position in the bathtub 1, that is, a water level h" (water head difference H") at which the amount of hot water stored is suitable for bathing.
The water level detector is electrically interlocked with the combustion controller 25, and is configured to perform combustion operation on only the central combustor 5 and heat the central heat exchanger 6 when the hot water level reaches h''. There is.

The operation of the water heater having the above configuration will be explained.

Now, when the hot water tap 20 is opened, the pressure reducing valve 1 is opened in conjunction with this.
4 opens, water at a constant pressure flows from the water supply pipe 15 to the external heat exchanger 1.
3 and reaches the flow switch 18, which is activated to operate the combustor 10.

Therefore, the water flowing through the external heat exchanger 13 is heated and raised in temperature, and hot water can be drawn from the hot water tap 20.

When the hot water tap 20 is closed, the pressure reducing valve 14 is closed and the flow switch 18 stops the operation of the combustor 10.

Next, the combustion controller 25 is operated and the two combustors 5.10
to be burned at the same time.

As soon as the combustor 10 fires, the selection device 17 connects the external heat exchanger 13 only to the central heat exchanger 6.

On the other hand, the water flowing through the external heat exchanger 13 is simultaneously heated and becomes hot water, which travels into the heat receiving tank 7 via the communication pipe 16.

The hot water that flows into the heat receiving tank 7 passes through the central heat exchanger 6 and is further heated to become high-temperature hot water, reaches the hot water storage tank 8, flows into the bathtub 1 from the lower circulation pipe 3, and the water level h'-
The hot water is stored with a uniform high temperature distribution at t, and the first water level detector 28 detects this and the selection device 17 is activated, clearly cutting off the communication between the exchangers 6 and 13 and moving both the combustor 5°. 10 combustion and hot water supply.

This amount of stored hot water is not appropriate for both the amount and temperature of hot water for bathing, especially when the water temperature is set to a high temperature.

Therefore, the existing hot water tap 30 is opened to replenish water into the bathtub 1.

When the water level in the bathtub 1 reaches h', the second water level detector 25 is activated, and the combustion controller 25
Burn only.

Therefore, hot water in the bathtub 1 is circulated between the central heat exchanger 6 and the bathtub 1 and heated.

When the temperature inside the bathtub 1 reaches a predetermined temperature, the temperature sensor 2
6 operates to stop the fuel supply device 22 and the blower 23, thereby stopping combustion in the combustor 5.

When the temperature of the water in the bathtub 1 becomes low, the temperature sensor 27 automatically starts combustion in the combustor 5 again.
This keeps the temperature of the water inside constant.

Therefore, according to this embodiment, although the amount and temperature of hot water in the bathtub 1 vary depending on the person, it is possible to always obtain a constant hot water temperature at a constant amount set by the "kidori h", and depending on the dilution You can get the amount of hot water and the temperature.

The present invention includes a first heating heat exchanger that heats water from a water source, and a second heating heat exchanger that is interposed in the bathtub hot water circulation path that reheats the hot water in the flow path of the heat exchanger. a combustion controller that burns both or only one of the heating combustors of each heat exchanger; a first and second water level detector that detects different values of the amount of hot water stored in the bathtub; and a temperature detection value for detecting the temperature, and when the first water level detector detects the first predetermined water level, the operation of each combustor is stopped, water from the water source is supplied into the bathtub, and the second water level is supplied to the bathtub. The configuration is configured such that when the water level detector detects the second predetermined water level, the heating combustor of the second heating heat exchanger is controlled based on the temperature sensor.
High-temperature hot water can be supplied into the bathtub while the water is heated by two combustors, and water can be supplied to quickly fill the bathtub with the desired amount of hot water, making it possible to supply water to conventional bathtubs. There is no need to monitor the water supplied to the bathtub unlike in bathtubs that boil the water after the bath, and there is no need to worry about overboiling the water, reducing the time spent bathing and reducing waste of hot water. It can be prevented.

In particular, the present invention has the flexibility to maintain a constant water temperature.

[Brief explanation of the drawing]

The figure is a sectional view showing an example of a water heater according to the present invention. 1...Bathtub, 5.10...Combustor, 6
...Second heat exchanger, 13...First heat exchanger, 17...Distribution route selection device, 28.29
......First and second water level detector, 25...
Combustion controller, 26...Temperature detector.

Claims (1)

[Scope of utility model registration request] a first heating heat exchanger that heats water from a water source; and a second heating heat exchanger that is interposed in a circulation path for hot water in the bathtub that reheats hot water in a flow path of the heat exchanger. a combustion controller that burns both or only one of the heating combustors of the heat exchanger, first and second water level detectors that detect different values of the amount of hot water stored in the bathtub, and detects the temperature of the hot water stored in the bathtub. and a temperature detection value, and when the first water level detector detects the first predetermined water level, the operation of each combustor is stopped, water from the water source is supplied into the bathtub, and the second water level detector 2. A hot water supply apparatus, characterized in that, when the temperature sensor detects a second predetermined water level, the heating combustor of the second heating heat exchanger is controlled based on the temperature sensor.