JPH0644897B2 - Water heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device for supplying hot water for beverages at home, office and the like.

2. Description of the Related Art Since tap water in recent years contains a large amount of free chlorine, it has a odor of chlorine (chlorine odor), and also contains carcinogenic trihalomethanes that are secondary to free chlorine. , It is not delicious and has a problem in health. Therefore, the conventional hot water supply device releases free chlorine in water to the atmosphere by continuing the boiling time for several minutes to remove the chlorine odor in tap water. It is also known that water is circulated and boiled using a heat pump, and activated carbon or the like is provided in a part of the circulation path to remove the odor of chlorine.

However, there is a limit to the removal of free chlorine by the above-mentioned method of sustaining boiling, and it has not been possible to remove free chlorine sufficiently and in a short time. In addition, there is a problem that steam is continuously discharged from the water heater when it is boiled for a long time. On the other hand, in the case of using a heat pump and activated carbon or the like, there is a problem that the removal of trihalomethane generated when the water temperature rapidly rises by the heat pump cannot be sufficiently performed by the activated carbon or the like.

The present invention solves such a problem, and can efficiently remove a large amount of chlorine odor in hot water and supply a delicious and healthy hot water with very little chlorine odor during pouring. An object of the present invention is to provide a hot water supply device that can be used.

Means for Solving the Problems To achieve the above object, the present invention provides a hot water storage container, a heater for heating water in the hot water storage container, and an electric motor driven by a motor for pumping hot water in the hot water storage container. A pump,
It is located at the opening of the circulation path that guides the hot water to the water injection port, the circulation path that circulates the hot water in the hot water storage container by driving the electric pump before boiling at the set temperature, and the opening of the circulation path to the hot water storage container. A hot water supply device having a hot water diffusing section filled with a filler for removing free chlorine in hot water.

Function As described above, the hot water is circulated by driving the electric pump before boiling at the set temperature, and the hot water is diffused and discharged through the hot water diffusing section filled with the filler. That is, due to the circulation action of hot water that drives the electric pump at the most suitable temperature for removing free chlorine, the decomposition or adsorption action of the filler, and the release action to the atmosphere by diffusion and outflow of hot water, the chlorine odor and trohalomethane It is possible to remove efficiently and to pour out delicious hot water.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is an exterior main body of a hot water supply apparatus, in which a hot water storage container 2 having an inner diameter of 50 mm and a depth of 180 mm for storing hot water is provided. Reference numeral 3 is an inner plug attached so as to seal the mouth of the hot water storage container 2. Reference numeral 4 denotes an upper lid attached so that the upper portion of the entire exterior 1 can be opened and closed. A check valve 5 penetrates the inside plug 3 to communicate with the inside of the hot water storage container 2 and the atmosphere. Reference numeral 6 is a motor provided at the bottom between the exterior main body 1 and the hot water storage container 2. An electric pump 7 is driven by a motor 6, and its suction port 8 communicates with the bottom of the hot water storage container 2. Reference numeral 9 is a discharge port of the electric pump. Hot water is pumped upward through a discharge pipe 10 and is poured through a switching valve 11 to a cup or the like from a water injection port 12 or again through a circulation route 13. The hot water storage container 2 is circulated. Reference numeral 14 denotes a heater for heating, which is mounted on the lower side surface of the hot water storage container 2 to heat the water in the hot water storage container. 1
Reference numeral 5 is a starting portion for driving the motor 6, which is composed of a switch and a variable resistor, and which is pushed by the push button 16 to move the rod
It works via 7. Reference numeral 18 is a compression type spring, and this spring 18 constantly biases the rod 17 so as to push it upward. Reference numeral 19 denotes a changeover valve switch for operating the changeover valve 11, which can be freely changed over from the outside of the exterior main body 1, and can switch between the water injection route and the circulation route. A temperature detector 20 detects the water temperature in the hot water storage container 2, and when the set temperature is reached, the electric pump 7 is operated to circulate the water in the circulation path 13. Reference numeral 21 denotes a hot water diffusing portion provided at an opening portion of the circulation path 13 to the hot water storage container 2 and for diffusing hot water, and a plurality of small holes are provided toward the hot water storage container 2. A filler 22 is filled in the hot water diffusion portion 21 and is made of one or both of fibrous aluminum and activated carbon.

Next, the operation of the above configuration will be described. When the hot water in the hot water storage container 2 is stored, when pouring the hot water, the push button 16 is pushed down to turn on the switch of the starting unit 15, and further pushing down changes the resistance to change the supply voltage, The motor 6 is energized. When the motor 6 is energized, the electric pump 7 operates, sucking hot water from the suction port 8 of the electric pump 7,
From the discharge port 9, through the discharge pipe 11 and the switching valve 12. At this time, if the valve is opened to the water injection path side by the changeover valve switch 19, hot water is poured out from the water injection port 12. At this time, if the valve is opened in the circulation path 13, the hot water flows into the hot water storage container 2 again through the circulation path 13 and the hot water diffusion portion 21.

On the other hand, the heater 14 is heated at the same time as being energized, and when the temperature of the hot water in the hot water storage container 2 reaches 100 ° C., the temperature detector 2
When 0 is activated, the power supply to the heater 14 is interrupted. Also,
The heater 14 is also capable of continuous heating by operating a switch that keeps heating even when the temperature of the hot water reaches 100 ° C. Now, add 1000 ml of ultrapure water to the initial free chlorine concentration of 2 ppm, and add chlorine water to the hot water storage container 2
Store inside. At the same time as energizing the hot water supply device, the push button 16 is pushed down and the electric pump 7 is operated to circulate the hot water through the circulation path 13 at a flow rate of 50 cc / sec.
The change in free chlorine concentration in the hot water at this time is shown in FIG.
The free chlorine concentration was quantified according to the residual chlorine item of the water purification test method and the DPD method. The vertical axis is the residual rate of free chlorine, and the horizontal axis is the time during which the hot water is boiling. After the hot water reached 100 ° C., the heater 14 was continuously heated to continue boiling.
It takes about 8 minutes for the water to boil.
In the figure, a is a case where nothing is filled in the hot water diffusion part 21, b is a case where 1 g of fibrous aluminum is filled in the hot water diffusion part 21, and c is a case where 1 g of activated carbon is filled in the hot water diffusion part 21. Is. As is clear from the figure, the chlorine removal rate is better when fibrous aluminum and activated carbon are filled.

By the way, in the embodiment of the present invention, since the electric pump 7 is used instead of the conventional heat pump, the hot water can be circulated before the boiling depending on the set temperature (the temperature detector 2
If the set temperature of 0 is set to 80 ° C., for example, circulation will be performed at 80 ° C.). That is, the free chlorine can be removed before the temperature at which the trihalomethane rapidly increases and when the activity of the filler 22 is maintained. Also, the filler 2
Coupled with the hot water diffusing action of the hot water diffusing section 21 filled with 2, it is possible to effectively remove free chlorine and reduce the generation of trihalomethanes. It should be noted that when hot water is circulated at 80 ° C., the circulating sound is shorter than when it is circulated from the beginning (water temperature), and the circulating sound is not harsh. Moreover, it is possible to remove free chlorine almost in the same way as when it is circulated from the beginning.

EFFECTS OF THE INVENTION As is apparent from the above embodiments, according to the present invention, the circulating action by driving the electric pump before the boiling of the hot water at the set temperature, the decomposition or adsorption action by the filler, and the diffusion and outflow of the hot water in the atmosphere. The free chlorine component in the hot water can be removed efficiently and the generation of carcinogenic trohalomethane can be reduced at the same time, so a healthy tasty hot water with little chlorine component can be supplied at the time of pouring. Is what you can do.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the hot water supply apparatus of the present invention,
The figure is a characteristic diagram showing changes in free chlorine concentration in hot water. 2 ... Hot water storage container, 7 ... Electric pump, 11 ... Switching valve, 12 ... Water injection port, 13 ... Circulation path, 14 ... Heater, 15 ... Starting part, 19 ... Switching valve switch, 2
1 ... hot water diffusion part, 22 ... filling material.

Claims (1)

[Claims] 1. A hot water storage container, a heater for heating water in the hot water storage container, an electric pump driven by a motor for pumping the hot water in the hot water storage container, and a water injection path for introducing the water to a water injection port. A circulation path that circulates the hot water in the hot water storage container by driving the electric pump before boiling due to temperature, and a filler that is located at the opening of the circulation path to the hot water storage container and that removes free chlorine in the hot water inside A hot water supply device having a filled hot water diffusion unit.