JP3047129B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot water supply apparatus with improved hot water pouring ability.

[0002]

2. Description of the Related Art A conventional electric hot water supply apparatus has a configuration as shown in FIG. That is, as shown in FIG.
A container 2 for storing hot water is provided therein, a heater 3 is provided at a lower portion of the container to heat water 4 in the container, and a suction channel 6 and a pumping channel 7 for communicating the water 4 from the bottom 2 a of the container to the inlet 5. In this configuration, the water is pumped out by a water pump 8 installed on the way.

[0003]

In the above-described conventional hot water supply apparatus, air bubbles are generated in the pump chamber for a while after the hot water in the container boils, and the air bubbles generated by the pump decrease due to the air bubbles. It has the drawback that pumping is impossible.

[0004] For this purpose, a method of preventing the generation of air bubbles in the pump chamber by providing small rotating blades in the pump chamber is conceivable, but its effect is not sufficient.

It is an object of the present invention to provide a water heater in which the generation of air bubbles in the pump chamber can be almost completely prevented and extremely good water can be supplied. It is.

According to the present invention, the inside of the vessel becomes supersaturated before and after the temperature of the water reaches the boiling point due to the heating by the heater, and when the pump is operated in such a state, the pressure in the pump chamber decreases. Therefore, it is considered that a large amount of bubbles are generated, and the supersaturation state is alleviated to prevent the generation of bubbles in the pump chamber.

That is, the hot water supply apparatus of the present invention achieves the object by alleviating the supersaturated state by ventilating the air or steam in the upper part of the container in the exterior body and the air outside the container using a blower. did.

Here, it is preferable that the ventilation by the blower be performed only for a desired time before and after the temperature of the water in the container reaches the boiling point.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.
1 is an exterior body, 2 is a hot water storage container, 3 is a heater for heating the water 4 contained in the hot water storage container 3, 5 is a water storage port, 6 and 7 are a suction path and a pumping path, respectively, and 8 is a pump. Fig. 6
Is basically the same as the conventional example shown in FIG.

Reference numeral 9 denotes an escape port provided on the lid 10 or the like for releasing boiling steam. A water stop valve 11 is provided on the way to prevent water or hot water from leaking out even if the hot water supply device falls down. Reference numeral 12 denotes an air pump. When the pump 12 operates, air in the exterior body 1 is supplied to the container 2 through the air passage 13. In addition, 14 is a check valve and the water and hot water in the container 2 are pump 1
2 is prevented from entering.

In this embodiment, the pump 12 is operated when the temperature of the hot water reaches a boiling point by detecting a temperature sensor for controlling a heater for adjusting the temperature of the hot water in the container. The overheated state is removed by forcibly releasing the vapor in the upper part of the container by the function of the pump 12, and the supersaturated state in the container and the like is alleviated.
Therefore, good pumping is always performed and, of course, no hot water supply is impossible.

Here, the operation of the air pump 12 may be performed in conjunction with the operation of the pump 8 instead of at the time of overheating by the temperature sensor. In this case, of course, normal hot water supply can be performed if the pump is not supersaturated when the pump is in operation, and normal hot water can be supplied by the operation similar to that described above by the operation of the air pump if the pump is in the supersaturated state.

FIG. 2 is a diagram showing a second embodiment of the present invention. This embodiment is an example in which the blowing means is attached to the lid. That is, the air passage 16 and the air pump 15 are provided in the lid 10.

In this embodiment, the operation of the blower pump 15 causes the outside air to flow in from the blower passage 16 and discharge the steam in the water heater from the outlet 9 or the steam pump 15 discharges the steam in the water heater to escape. Outside air flows in through the port 9. As a result, the generation of air bubbles in the water pump is prevented, and good hot water is supplied.

Also in this embodiment, the air pump can be operated at the time of overheating or at the time of operating the water pump.

In the third embodiment, an air pump is directly connected to a water pump, and the air pump is operated simultaneously with the driving of the water pump.

FIG. 3 is an enlarged view of a part of the pump according to the third embodiment. In this figure, reference numeral 20 denotes a motor, and a rotating magnet 22 is fixed to a motor shaft 21. Further, a magnet 24 and an impeller 25 are rotatably mounted with a partition plate 23 interposed therebetween. On the other hand, the shaft 26 is connected to a diaphragm pump 30 via an eccentric cam 27, an eccentric shaft 28, and a connecting rod 29.

In the third embodiment, the pump having the above structure is arranged below the container. When the motor 20 is driven to operate the water pump for supplying hot water, the impeller 25 is driven by the magnetic coupling. At the same time as the shaft 26 is rotated, the diaphragm 31 is moved up and down in FIG.
The diaphragm pump is operated by changing the volume of the diaphragm pump.
In other words, the vertical movement of the diaphragm 31 causes the intake valve 33 to open when the diaphragm 31 rises, and sucks air from the outside through the intake port 34. The intake valve 33 closes due to the lowering of the diaphragm, the exhaust valve 35 opens and the exhaust port 36 opens. Send out more. In the drawing, 37 is a pump housing, 38 is a fixed diaphragm, and 39 is a fixed valve.

As described above, for example, as in the embodiment of FIG. 1, air and water vapor in the upper part of the container are sent out of the water heater, and the generation of air bubbles in the pump chamber is performed by the same operation as in the first and second embodiments. I can hold it down.

In this embodiment, since the pump and the air pump are substantially directly connected to each other, the present invention is not applied to the operation of the air pump based on temperature detection, but to a method in which the air pump operates when the pump is operated. Will achieve the purpose.

In the first embodiment and the second embodiment of the above embodiment, the ventilation mechanism, that is, the air only when the temperature of the upper part in the container 2 has reached the boiling point and the pump 8 is operated. -The pump 13 or 19 may be activated. In this way, even if the upper part in the container has reached the boiling point, the ventilation mechanism does not work unless the pump is operated, so that the temperature does not decrease due to ventilation,
A slight loss of energy can be prevented. Similarly, even when the water pump is operated, the ventilation device does not operate unless the temperature in the upper portion of the container has reached the boiling point at that time.

4 and 5 show the ventilation timing. FIG. 4 shows the case where the overheating temperature is detected and the air pump is operated.

As shown in this figure, when the temperature of the hot water exceeds the boiling temperature, the heater is turned off and at the same time the ventilation (air pump) is turned on.

On the other hand, FIG. 5 shows a case in which the operation of the water pump and the operation of the ventilation means such as the air pump are linked, and the air pump is turned on at the same time when the water pump is turned on.

[0025]

According to the present invention, the supersaturated state in the container is alleviated by ventilating the air and steam in the upper part of the container with the air outside the container, and the generation of air bubbles in the pump chamber can be almost completely prevented. Hot water was made possible. In addition, since ventilation is limited to only before or after the boiling point of water temperature or during hot water supply, there is almost no effect of ventilation on other things. Also, the operation of the ventilation means can be manufactured by a simple modification of the conventional one such that the temperature measurement for adjusting the water temperature of the conventional water heater can be used as it is.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of a second embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of a third embodiment of the present invention.

FIG. 4 is a diagram showing ventilation timing in the present invention.

FIG. 5 is a diagram showing another ventilation timing according to the present invention.

FIG. 6 is a sectional view of a conventional hot water supply device.

[Explanation of symbols]

1 Hot water supply unit exterior body, 2 containers, 3 heaters, 8
Pump, 9 Spill water, 12 Air pump, 13
Air duct.

Claims (3)

(57) [Claims] 1. An exterior body, a container for storing hot water provided in the body, a heater for heating water in the container, a pump for pumping hot water in the container to a water inlet, and a space in an upper part of the container. A hot water supply device, comprising: a blower provided to ventilate the air and steam and air outside the container, wherein the blower is disposed in a lid that can be opened and closed with respect to the main body. 2. An exterior body, a container for storing hot water provided in the body, a heater for heating water in the container, a pump for pumping hot water in the container to a water inlet, and a space in an upper part of the container. Blower means provided for ventilating the air and steam of the container and air outside the container, wherein the blower means is directly connected to the water pump so that the blower means operates simultaneously with the operation of the pump. A hot water supply device characterized by the following. 3. The hot water supply apparatus according to claim 1, wherein said ventilating mechanism is activated when the temperature in the upper portion of said container reaches a boiling point.