JP2753131B2 - Electric water heater - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric water heater capable of displaying a flow rate or a temperature of hot water.

2. Description of the Related Art In a conventional electric water heater, when a user discharges a liquid in a container, an operation knob is operated to drive an electric pump, and when it is determined that an appropriate discharge amount has been reached, an operation knob is operated. Is returned to 0 to stop driving the electric pump.

Problems to be Solved by the Invention However, in this configuration, the amount of hot water to be discharged is determined by a unit amount, and it is inconvenient when hot water with an accurate discharge amount is required. For example, when trying to make instant noodles quickly, simply putting water from an electric water heater into a pot and putting dry noodles resulted in too much or too little hot water to be discharged. Ramen taste is not constant. Therefore, in practice, it is necessary to add hot water measured in the unit of measure and dried ramen into a pan and reheat the pan.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electric water heater that can obtain hot water with an accurate discharge amount.

Means for Solving the Problems To achieve the above object, the present invention provides a heating means for heating a liquid in a container, an electric pump for pumping the liquid, and a flow rate for detecting the flow rate when the liquid is pumped. A sensor and a display means for displaying the output of the flow rate sensor are used. The flow rate sensor is an electric water heater that uses a float that is turned by the inflow of liquid and that detects the number of revolutions of the float by the measurement means.

A heating means for heating the liquid in the container; an electric pump for pumping the liquid; a flow sensor for detecting the flow rate when the liquid is pumped; a temperature sensor for measuring the temperature of the liquid; An operation knob for adjusting, and display means for displaying a liquid temperature display and a discharge amount display, the display means being capable of switching between a liquid temperature display and a discharge amount display by operation of the operation knob. Container.

An electric water heater having a casing provided with a guide body protruding at the center of the inner bottom surface, having a float in the casing, and forming a liquid inlet and an outlet of the casing at right angles to each other. Things.

According to the first aspect of the invention, when the electric pump is operated to pump and discharge the liquid in the container, the flow rate sensor operates to detect the flow rate of the liquid, and the display means displays the flow rate. That is, the user can obtain an accurate amount of liquid by looking at the display on the display means.

According to the second invention, it is possible to switch and display the flow rate of the liquid according to the first invention and the temperature of the liquid, so that the electric water heater is more convenient for the user. .

According to the third aspect of the invention, the float can be easily swirled, and the liquid can be accurately detected even at a low flow rate.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes an exterior body of an electric water heater, which has a container 2 for storing a liquid such as water therein. Reference numeral 3 denotes an upper lid provided so as to seal the opening of the container 2 when closed, and is configured to open and close the upper part of the exterior body 1. Container 2
A heating means 4 for heating the liquid stored in the container 2 is mounted on the lower bottom surface of the container 2. An electric pump 5 and a flow sensor 6 are provided at the bottom between the exterior body 1 and the container 2. The electric pump 5 pumps hot water from the bottom of the container 2 to the spout 8 through the flow rate sensor 6 and the discharge pipe 7. The flow sensor 6 detects the flow rate of the pumped liquid. Reference numeral 9 denotes a temperature detecting thermistor mounted on the lower side surface of the container 2 to detect the temperature of the liquid stored in the container 2. An electric pump 5 is provided above the container 2.
A flow control unit 10 composed of a start switch for driving the liquid crystal display and a variable resistor for controlling the flow rate of the liquid, and a changeover switch 11 for switching between temperature display and flow display in conjunction with the flow control unit 10 are provided. 12 is the flow control unit 10 and the changeover switch
This is an operation knob for operating the unit 11, and is provided to protrude from the front head of the exterior body 1. The flow control unit 10 and the changeover switch 11 are also provided in the forehead of the exterior body 1.

Next, the configuration of the flow sensor 6 will be described with reference to FIG. Reference numeral 14 denotes a casing of the flow sensor 6, which has a guide body 15 protruding at the center of the inner bottom surface. Also casing
A float 16 is sealed in the interior of the casing 14 and floats when the casing 14 contains liquid. Also
17 is a fluid inlet provided on the lower side surface of the casing 14, 18
Is a fluid outlet provided at the upper center of the casing 14. The inlet 17 and the outlet 18 are provided at right angles to each other. Reference numerals 19 and 19 'denote light-emitting elements and light-emitting elements provided at the upper and lower portions of the casing 14, respectively.

Hereinafter, the operation of the flow sensor 6 will be described. When the liquid flows from the inlet 17, the float 16 floats on the surface of the liquid and revolves around the guide 15 in the casing 14 together with the liquid. The liquid is discharged from the outlet 18 while performing a swirling motion. In this case, the light emitting element 19 and the light receiving element 19 'are repeatedly turned on and off in synchronization with the turning movement of the float 16. By detecting the number of on / off times, the flow rate of the liquid can be measured.

Next, a control configuration will be described based on FIGS. 3 and 4. FIG. The forehead 20 provided on the upper surface of the exterior body 1 has a container 2
A display means 21 for displaying the temperature or the discharge amount of the liquid inside is provided together with the operation knob 12. Then, the temperature of the liquid in the container 2 is detected by the temperature detecting thermistor 9,
This signal is output to the temperature measurement circuit 22. Temperature measurement circuit
22 converts this signal to a digital signal,
Output to 11. On the other hand, the flow signal of the liquid detected by the flow sensor 6 is integrated by the discharge amount measuring means 23 (a counter circuit in the embodiment), and the integrated value of the liquid flow, that is, the information of the discharge amount is similarly sent to the changeover switch 11. Can be Selector switch
11 is always set to the temperature measurement circuit 22 side, and the temperature signal is sent to the display means 21. When the user operates the operation knob 12 to turn on the variable resistor that constitutes the flow control unit 10, the changeover switch 11 switches to the measurement unit 23 side, and the display unit 21 displays a signal indicating the discharge amount. Output.
24 is a pump drive circuit for driving the electric pump 5.

The operation will be described below. The liquid stored in the container 2 is heated by the heating means 4. The temperature of the liquid is detected by the temperature detecting thermistor 9, and is displayed on the display means 21 provided on the front head 20 on the upper surface of the exterior main body 1 via the changeover switch 11 from the temperature measuring circuit 22. The user can determine whether or not the temperature appropriate for cooking has been reached by looking at the displayed temperature. If this temperature has reached an appropriate value, the user operates the operation knob 12 to adjust the resistance value of the variable resistor constituting the flow control unit 10, activates the pump drive circuit 24, and operates the electric pump 5. Drive. When the electric pump 5 is driven, the liquid stored in the container 2 is supplied to the flow sensor 6.
-The water is pumped through the pumping pipe 7 and discharged from the outlet 8. At this time, the amount of liquid to be dispensed is displayed on the display means 21 as follows. That is, when the liquid passes through the flow rate sensor 6, the inlet portions provided at right angles to each other
A swirling flow is formed from 17 to the outlet 18. Float 16
Riding around the guide body 15 in the casing 14 rides on this swirling flow. The light emitting element 19 and the light receiving element 19 '
The on / off operation is repeated according to the turning motion of 16, and this signal is sent to the measuring means 23. The measuring means 23 integrates this signal and outputs a signal indicating the discharge amount which is an integrated value of the liquid flow rate, and the display means 21 displays this information. In this way, the user can know the discharge amount of the liquid being discharged from the spout 8 every moment, and when the required amount is reached, the operation can be ended by returning the operation knob 12 to 0. .

By using the above embodiment, the forehead of the exterior body 1
20, it is possible to display both hot water temperature information and flow rate information,
The forehead 20 can be made smaller. In the flow rate sensor 6 of the embodiment, the inlet portion 17 and the outlet portion 18 are provided so as to be perpendicular to each other, and the float 16 is
, The float 16 can be easily turned by the liquid passing therethrough, and the friction due to sliding is small and the load is light, so that it can be detected very accurately even at a low flow rate.

Effect of the Invention As described above, according to the electric water heater of the first invention, the discharge amount of the liquid is integrated and displayed on the display means, and the required amount can be obtained accurately. Further, since the flow rate is measured by detecting the number of rotations of the float as a flow rate sensor by a measuring means, the discharge amount of the liquid can be easily measured by a flow rate sensor having a simple configuration. Further, according to the electric water heater of the second invention, by using the electric water heater configured to switch between the display of the temperature of the liquid and the display of the discharge amount, the temperature information and the flow rate information can be changed by operating the operation knob. It switches automatically and becomes more convenient.

Furthermore, according to the electric water heater of the third aspect of the invention, the guide body of the casing and the inlet / outlet configuration provided at right angles to each other allow the float to easily swirl by the liquid passing therethrough, In addition, since the friction due to sliding is small and the load is light, it can be detected very accurately even at a low flow rate.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electric water heater according to an embodiment of the present invention,
FIG. 2 is a longitudinal sectional view showing the flow rate sensor, FIG. 3 is an external perspective view of the electric water heater, and FIG. 4 is a block diagram showing the control circuit. 2 ... container, 4 ... heating means, 5 ... electric pump, 6 ...
... Flow sensor, 10 ... Switch, 12 ... Operation knob, 16 ... Float, 21 ... Display means, 23 ... Measurement means.

Claims (3)

(57) [Claims] 1. A heating means for heating a liquid in a container, an electric pump for pumping the liquid, a flow sensor for detecting a flow rate of the liquid when the liquid is pumped, and a display means for displaying an output of the flow sensor. An electric water heater, wherein the flow rate sensor uses a float which is turned by the inflow of liquid, and a rotation speed of the float is detected by a measuring means. 2. A heating means for heating a liquid in a container, an electric pump for hot and cold the liquid, a flow rate sensor for detecting the flow rate of the liquid when pumping the liquid, a temperature sensor for measuring the temperature of the liquid, An operation knob for adjusting the discharge amount, and display means for displaying the temperature of the liquid and the display of the discharge amount are provided, and the display means can switch between the display of the temperature of the liquid and the display of the discharge amount by the operation of the operation knob. Electric water heater. 3. A casing provided with a guide body protruding at the center of the inner bottom surface, a float is provided in the casing, and a liquid inlet and an outlet of the casing are formed at right angles. An electric water heater as described.