JP3596538B2 - Electric water heater - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric water heater mainly used in a general household or office, and more particularly to an electric water heater provided with a water storage tank in addition to a water heater container.
[0002]
[Prior art]
Conventionally, this type of electric water heater, as is often used in ordinary households, heats water contained in a water heater container by heating means to boil the water, keeps it at a constant temperature, and turns on a pump when necessary. It is driven to draw hot water out of the body and use it. Water was supplied to the kettle container by opening the lid covering the kettle container and adding water.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional configuration, water may be supplied to the kettle container at a predetermined amount or more, and after the kettle is finished, an unnecessarily large amount of heat is kept, and power is wasted. In addition, when supplying water to the kettle container, it is necessary to open the lid and pour the water into the hot water, so that attention must be paid to splashing of the hot water.
[0004]
The present invention solves the above-described problems, and reduces the power consumption by heating and keeping only a necessary amount of water in a water heater container without water being supplied to the water heater container in a predetermined amount or more, and further reduces the work time when water is supplied. An object of the present invention is to provide an electric water heater that is easy to operate.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned conventional problems, the electric water heater of the present invention is provided with a water storage tank provided adjacent to a water heater container, and the water heater container is connected to the water storage tank by a water supply path, and according to the capacity of the water heater container. A configuration in which water is supplied from the water storage tank, the water is supplied to the water heater container by a predetermined amount or more, and before reaching a water level that overflows outside the body, water overflows from a water overflow portion of a water supply receiver provided in the water supply tank into the water storage tank. It was done.
[0006]
This reduces the power consumption by heating and keeping only the required amount of water in the water heater container without storing the water in the water heater container in a predetermined amount or more, and storing the remaining amount in the water storage tank. If it is removable, the water supply work is safe and easy by carrying only the water storage tank and supplying water from the tap.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 is a water heater containing water, heating means for heating the water in the water heater, a water storage tank for supplying water to the water heater, and one end of the water heater. A connected water supply channel, an inlet serving as an opening for supplying water from the water storage tank to the water supply channel, a water pumping channel for pumping water from the water storage tank, and a water supply provided in the middle of the water pumping channel. A pump and a pumping section for pumping water from the water supply pump to guide the water to the inlet, and in the middle of the water from the water pump to the water inlet, providing a flooding section capable of overflowing water pumped in the water pump. Because of this, the pressure in the pumping channel is released and the water overflows from the overflow section of the water supply receiver before the water overflows outside the body, so that only a required amount of water is supplied to the water heater container without water being supplied to the water heater container in a predetermined amount or more. Heating Kept warm, except amount required to reduce power consumption by stockpiling in the water storage tank, also water is safe and easy by performing in the water storage tank.
[0008]
According to the second aspect of the present invention, in particular, in the configuration according to the first aspect, the water overflowing from the overflow section is pumped up again by the pumping passage, so that the water overflowing from the overflow section of the water supply receiver is supplied to the inside of the water storage tank. The water is pumped down again and circulated in the water storage tank to prevent water from flowing out of the vessel.
[0009]
According to a third aspect of the present invention, in the configuration according to the first or second aspect, a water supply receiver having an overflow portion for guiding water to an inlet and allowing water to overflow, and supplying the water in the water storage tank with the water. A pumping channel for pumping water to a receiver, and a pumping channel outlet on the water supply receiving side of the pumping channel is open to the atmosphere, so that the portion to be exposed to the atmosphere is easily enlarged and the overflow capacity is increased even when the pumping amount is increased. Can be increased, and the water can be efficiently guided from the pumping passage to the inlet by the water supply receiver.
[0010]
According to a fourth aspect of the present invention, in particular, in the configuration according to the third aspect, since the water receiver is provided in the water storage tank, the water overflowing from the overflow part of the water receiver flows down into the water storage tank. Prevents water from flowing out of the body.
[0011]
According to a fifth aspect of the present invention, in particular, in the configuration according to the third or fourth aspect, the overflow portion of the water supply receiver is disposed below the level of overflow of the electric water heater outside the body (hereinafter abbreviated as the body). Thus, it is possible to prevent the water level in the vessel from being higher than the overflow water level (the water level that overflows to the outside of the vessel when the water level exceeds the water level). Therefore, it is possible to prevent the water from flowing out of the body from the highest point of the outlet path or the steam port for leading the hot water out of the body from the water heater, for example, due to a failure of the water supply pump during water supply.
[0012]
According to a sixth aspect of the present invention, in the configuration according to any one of the third to fifth aspects, the water supply port to the water heater container is an electric water heater positioned below a full position of the water heater container. Is located below the full position of the water heater container, so that when water is heated at the full position, steam enters from the water supply port and enters the water storage tank through the water supply channel, and the inside of the water storage tank becomes cloudy. To prevent.
[0013]
According to a seventh aspect of the present invention, in the configuration according to any one of the first to sixth aspects, the water storage tank is provided with an electric water heater having an air vent hole, so that the internal pressure in the water storage tank at the time of water supply decreases. It prevents the speed at which water is supplied to the kettle container from decreasing.
[0014]
According to an eighth aspect of the present invention, in the configuration of any one of the first to seventh aspects, an electric water heater having a bent portion forming a water trap by storing water in a water supply channel is provided, thereby providing a water heater container. This prevents the steam generated inside from entering the water supply port, passing through the water supply passage, entering the water storage tank, and fogging the water storage tank.
[0015]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
(Example 1)
First Embodiment A first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, water 2 contained in a kettle 1 is heated to a predetermined temperature by a heating element 3 which is a heating means provided at the bottom of the kettle 1. The water 2 heated to a predetermined temperature is guided to the outside of the body from the outlet 12 through the outlet 11 by the pump 10 as the outlet. The upper opening of the water heater container 1 is covered with a lid 5, and the lid 5 is provided with a steam port 5a for guiding the steam generated in the water heater container 1 to the outside of the body.
[0017]
When the water 2 in the kettle 1 drops to a certain amount, the water 2 contained in the water storage tank 20 provided with the kettle 1 passes through the pumping channel 24 and passes from the pumping channel outlet 25 according to a signal from the control unit 4. The water is poured into the water supply receiver 27, passes through the water supply passage 21 from the inlet 26 provided at the bottom of the water supply receiver 27, and is automatically added to the water supply port 22 by a fixed amount. The added water 2 is intermittently or continuously poured to a predetermined amount.
[0018]
A water supply pump 23 as a water pumping means is provided in the water pumping path 24. The water supply pump 23 includes a water supply pump case 23a and a water supply pump driving means 23b. An impeller or the like for sending out the water 2 is stored in the water supply pump case 23a. The water supply pump driving means 23b is a power generation device such as a motor. The power of the water supply pump driving means 23b is transmitted in a non-contact manner by coupling between a magnet built in the impeller or the like and a magnet connected to the motor. The power may be transmitted using a gear or the like.
[0019]
The water storage tank 20 is detachable from the water heater container 1. The drive of the pump 10 and the water supply pump 23 is performed by a control unit 4 which is a control unit. The control unit 4 supplies water to a required amount according to the water amount detected by the water level sensor 13 provided in the water heater vessel 1 or the outlet path 11. The pump 23 is driven.
[0020]
The drive unit 4 may drive the water supply pump 23 for a fixed time according to the amount of water. In addition, the water supply receiver 27 may be integrally formed as a part of the water storage tank 20.
[0021]
With the above-described configuration, only the required amount of water is immediately stored in the water heater 1 for water heating and heat retention, and the water tank 2 as a spare tank stores the water 2 to be heated in the future, thereby reducing power consumption. In addition, since the water supply is performed in the water storage tank 20, there is no need to pay attention to hot water or steam.
[0022]
In addition, the water is pumped by the water supply pump 23 and guided to the inlet 26, and the overflow section 27a that can overflow the water pumped in the water pump 24 is provided on the way from the water pump 24 to the inlet 26. It is possible to prevent the water from being supplied to the water heater container 1 by a predetermined amount or more. That is, when water is supplied from the water storage tank 20 to the kettle 1, the water level sensor 13 normally detects that the water 2 has been supplied to the full position 1 a and stops the water supply pump 23. Even when the water level is erroneously detected or the water supply pump 23 does not stop due to an abnormality in the control unit 4, etc., when the amount of water in the water heater vessel 1 reaches or exceeds the overflow part 27a of the water supply receiver 27, the water 2 is stored from the overflow part 27a. Since the water overflows into the tank 20a, no more water is supplied to the water heater container 1.
[0023]
Further, a water supply receiver 27 having an inlet 26 provided at the inlet of the water supply channel 21 and communicating with the water supply channel 21 at the bottom and having an overflow portion 27a capable of overflowing water, and a water supply receiver 27 A pumping passage 24 for pumping water is provided. The pumping passage outlet 25 on the water supply receiver 27 side of the pumping passage 24 is configured to be open to the atmosphere. It is easy to increase the open portion of the pump, so that even if the pumping amount is increased, the overflow capacity can be increased, and water can be efficiently guided from the pumping passage to the inlet.
[0024]
Further, since the water overflowing from the overflow portion 27a is pumped up again by the water pumping channel 24, the water overflowing from the overflow portion 27a of the water supply receiver 27 flows down into the water storage tank 20, is pumped up again, and is circulated in the water storage tank 20. To prevent water from flowing out of the vessel.
[0025]
In addition, since the water supply receiver 27 is provided in the water storage tank 20, the water overflowing from the overflow portion 27a of the water supply receiver 27 flows down into the water storage tank 20, thereby preventing the water from flowing out of the container.
[0026]
Also, by setting the position of the overflow portion 27a below the position where the water overflows outside the vessel, that is, below the highest point of the outlet channel 11 or the steam port 5a, the discharge of the water 2 from the outlet port 12 or the steam port 5a can be performed. Since the water can be prevented from being supplied and the water is supplied from the water storage tank 20, it is not necessary to pay attention to the splash of hot water or steam.
[0027]
(Example 2)
Second Embodiment A second embodiment of the present invention will be described with reference to FIG. The difference from the first embodiment is that the water supply port 22 connected to the side surface of the water heater 1 of the water supply channel 21 is provided below the full position 1a of the water heater 1.
[0028]
As described above, according to the present embodiment, the water supply port 22 to the water heater container is located below the full water position 1a of the water heater container, so that water is supplied to the full water position 1a, and the water 2 is boiled in the water heater container 1 or When the temperature is kept warm, since the water supply port 22 is below the water level of the water 2, the steam filled in the water heater container 1 passes through the water supply passage 21, enters the water storage tank 20, and cloudes the inside of the water storage tank 20. Can be prevented.
[0029]
(Example 3)
Third Embodiment A third embodiment of the present invention will be described with reference to FIG. The difference from the already described embodiment lies in the configuration in which an air vent hole 28 is provided on the top surface or the side surface above the water filling position 20a of the water storage tank 20.
[0030]
As described above, according to the present embodiment, since the water storage tank 20 is provided with the air vent hole 28, when water is supplied from the water storage tank 20 to the water heater container 2, as the water level in the water storage tank 20 decreases, the air vent hole 28 When the air flows into the water heater vessel 2 from below, the internal pressure in the water storage tank 20 is reduced, and the speed at which the water 2 flows from the inlet 26 to the water supply channel 24 can be prevented from being reduced.
[0031]
(Example 4)
Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIG. A different point from the already described embodiment is that a bent portion 29 is provided in the water supply passage 21 so as to be bent in a U-shape so as to be located below the water supply port 22 to form a trap for storing the water 2.
[0032]
As described above, according to the present embodiment, water is stored in the water supply passage 21 and the bent portion 29 forming the water trap is provided, so that the water is supplied from the water storage tank 20 to the water heater container 1 and the water supply is stopped. In addition, since the water 2 is stopped in a state where water 2 is stored in the bent portion 29, the water supply channel 21 is closed, and even if the steam filled in the water heater container 1 enters from the water supply port 22, the steam passes through the bent portion 29. Therefore, the water does not flow into the water storage tank 20.
[0033]
【The invention's effect】
As described above, according to the present invention, the power consumption is reduced by heating and maintaining the temperature in the water heater, and the user can easily perform the water supply work by performing the water supply in the water storage tank, and the water can be easily and externally provided. It is possible to provide an electric kettle in which water hardly leaks.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an electric water heater according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view of an electric water heater according to Embodiment 2 of the present invention. FIG. 3 is a side sectional view of an electric water heater according to Embodiment 3 of the present invention. FIG. 4 is a side sectional view of an electric water heater according to a fourth embodiment of the present invention.
1 kettle container 2 water 3 heating element (heating means)
5 Lid 7 Water supply receiver 20 Water storage tank 21 Water supply channel 22 Water supply port 23 Water supply pump 24 Pumping channel 25 Pumping channel outlet 27a Overflow section 29 Bent section

Claims (8)

A water heater container for storing water, heating means for heating water in the water heater container, a water storage tank for supplying water to the water heater container, a water supply channel having one end connected to the water heater container, An inlet, which is an opening for supplying water from the tank to the water supply channel, a water pump for pumping water from the water storage tank, and a water supply pump provided in the middle of the water pump, comprising: An electric water heater provided with a water overflowing portion that pumps water and guides the water to the inlet, and on the way from the water pump to the water inlet, can overflow water pumped in the water pump. 2. The electric water heater according to claim 1, wherein the water overflowing from the overflow section is pumped up again by the pumping channel. A water supply receiver having an overflow portion that guides water to the inlet and allows water to overflow, and a pumping path that pumps water in the water storage tank to the water supply receiver. The electric kettle according to claim 1 or 2, wherein the outlet of the water pump is open to the atmosphere. The electric water heater according to claim 3, wherein the water supply receiver is provided in the water storage tank. The electric water heater according to claim 3 or 4, wherein the overflow portion of the water supply receiver is disposed below a level of overflow water outside a body (hereinafter abbreviated as a body) of the electric water heater. The electric water heater according to any one of claims 3 to 5, wherein a water supply port to the water heater container is located below a full position of the water heater container. The electric water heater according to any one of claims 1 to 6, wherein the water storage tank has an air vent hole. The electric water heater according to any one of claims 1 to 7, further comprising a bent portion that stores water in the water supply channel and forms a water trap.

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