JP3632435B2 - Instantaneous electric water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water supply path for supplying water, an instantaneous heating means having a heater, a hot water supply path for guiding water heated by the heating means to a water outlet, and a water flow detection means for detecting water flow. And an instantaneous electric water heater comprising a controller that takes in the signal of the water flow detection means and controls the heating means.
[0002]
[Prior art]
A conventional instantaneous electric water heater heats water supplied by a water supply channel by an instantaneous heating means, guides the heated water to a water outlet through a hot water supply channel, and supplies it to a user.
[0003]
[Problems to be solved by the invention]
In the conventional instantaneous electric water heater, it is necessary to increase the heating capacity of the heater in order to ensure the water discharge temperature and the water discharge flow rate necessary for obtaining a sufficient feeling of use. Therefore, if it is installed in an existing general household, the electrical equipment is changed, and as a result, the construction cost and the increase in the electricity cost may be burdened by the user. On the other hand, with an instantaneous electric water heater that can be installed as it is in existing household electrical equipment, it is not possible to obtain a sufficient water discharge flow rate to obtain a sufficient water discharge temperature, and to obtain a sufficient water discharge flow rate. Can not get enough water discharge temperature.
[0004]
The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to obtain a sufficient feeling of use even though it can be installed in an existing general household without changing the electrical equipment. It is another object of the present invention to provide an instantaneous electric water heater having a significant water-saving and power-saving effect and an effect of preventing water scattering during use.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in an instantaneous electric water heater that heats water supplied by a water supply channel by an instantaneous heating means, guides the heated water to a water outlet through a hot water supply channel, and supplies the water to a user. Even if it is installed in an existing general household, it is equipped with a bubble mixing means for forcibly mixing bubbles into the water and a controller that takes in the signal of the water flow detection means and controls the bubble mixing means. Even though it can be installed without changing the electrical equipment, it is possible to obtain a sufficient feeling of use, and furthermore, it has a significant water-saving and power-saving effect, and can prevent water scattering during use.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an instantaneous electric water heater showing an embodiment of the present invention. A water supply path 2 for supplying water to the main body 1 is connected to a heat exchanger 5 as a heating means having a heater 6 via a water flow switch 3 as a water flow detection means and a constant flow valve 4 as a flow restriction means. . The water heated by the heat exchanger 5 is discharged to the outside of the main body 1 through the hot water supply passage 10, but the hot water supply passage 10 is connected to the hot water tap 12 outside the main body 1 and discharged to the user. Here, the hot water supply passage 10 is provided with a bubble mixing portion 7 and is connected via an air supply passage 9 to an air pump 8 which is a bubble mixing means. The controller 11 reads a signal from the water flow switch 3 and controls energization of a motor that drives the heater 6 and the air pump 8.
[0007]
In the present embodiment, the heating means has a heater, but various applications such as a sheathed heater and a ceramic heater can be considered as the type of heater, and an electromagnetic induction type can be considered as another method. In addition, although an air pump is used as the bubble mixing means, various applications such as a compressor and an air fan are conceivable. Moreover, although the water flow switch is used as the water flow detection means, various applications such as a pressure switch are conceivable.
[0008]
In the above configuration, the operation of this embodiment will be described.
[0009]
First, when the user opens the hot water tap 12, water is supplied from the water supply path 2 to the main body 1 and flows into the heat exchanger 5. The water flow switch 3 provided in the water supply path 2 detects water flow, and the controller 11 reads the signal. The controller 11 starts energizing the motor that drives the heater 6 and the air pump 8 in conjunction with the water flow signal. With this energization, the heater 6 generates heat and heats the water flowing into the heat exchanger 5 and discharges it to the hot water supply passage 10. In addition, when the air pump 8 is driven, air is mixed into the heated water in the hot water supply passage 10 in the form of bubbles from the bubble mixing portion 7 provided in the hot water supply passage 10 through the air supply passage 9. Water is discharged from the hot water tap 12 connected to the outside of the main body 1 to the user. Moreover, the constant flow valve 4 provided in the water supply path 2 prevents the discharge water temperature from being lowered due to excessive water flow. The above operation is continued during use. Here, the air pump 8 can mix sufficient air even when the pressure in the hot water supply passage 10 is high, and can increase the flow rate of water discharged from the hot water tap 12. As a result, the momentum of water related to the feeling of use can be further increased, and as a result, a feeling of use that can be satisfactorily satisfied even with a small amount of water compared to the conventional method can be obtained. It can be kept low, leading to power saving. Furthermore, it can be easily installed without major changes to existing electrical equipment in ordinary households.
[0010]
Next, when the user finishes the use and closes the hot water tap 12, the water discharge from the hot water tap 12 stops and the supply of water that has been continuously supplied to the water supply channel 2 stops, so the water flow switch 3 detects the water stop, The controller 11 reads the signal. The controller 11 stops energization of the motor that drives the heater 6 and the air pump 8 in conjunction with the water stop signal. When the energization is stopped, the heater 6 immediately stops generating heat and prevents the water in the heat exchanger 5 from being boiled and aired. Further, when the air pump 8 is stopped, the flow of air mixed in the form of bubbles from the bubble mixing part 7 into the hot water supply path 10 through the air supply path 9 is stopped.
In this embodiment, (1) a so-called first stop type in which a hot water tap is connected to the outlet side of the main body has been described, but a so-called main stop type (2) hot water tap connected to the inlet side of the main body is provided separately from the main body. Although the system is used, it is considered that the present embodiment can be applied to the one integrated with the main body (3) the hot water tap provided with a shower or a bubble mixing portion.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an instantaneous electric water heater according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main body 2 ... Water supply path 3 ... Water flow switch (water flow detection means)
4 ... Constant flow valve (flow restriction means)
5 ... Heat exchanger (heating means)
6 ... Heater 7 ... Bubble mixing part 8 ... Air pump (bubble mixing means)
9 ... Air supply path 10 ... Hot water supply path 11 ... Controller 12 ... Hot water tap

Claims (2)

A water supply path for supplying water; an instantaneous heating means having a heater; a hot water supply path for leading water heated by the heating means to a water outlet; a water flow detection means for detecting water flow; and In an instantaneous electric water heater comprising a controller that takes in the signal of the water detection means and controls the heating means,
An instantaneous electric water heater comprising: a bubble mixing means for forcibly mixing bubbles in water; and a controller for taking in a signal from the water flow detection means and controlling the bubble mixing means . 2. The instantaneous electric water heater according to claim 1 , further comprising a flow restriction means .

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