JP2008289576A - Electric kettle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric kettle capable of actively improving the quality of liquid to a quality suitable for brewing tea, etc. by effectively adjusting the pH value of the liquid. <P>SOLUTION: The electric kettle includes a container 3 for storing the liquid 2; heating means 6 for heating the liquid in the container 3; temperature detecting means 7 for detecting the temperature of the liquid 2; control means 8 for controlling the heating means 6 according to the temperature detected by the temperature detecting means 7; and pH value increasing means 10 for executing a pH value increasing course for the liquid 2 by heating the liquid by the heating means 6 by a prescribed amount of heat after reaching the boiling point of the liquid. The pH value increasing course for the liquid 2 is configured to adjust the amount of heat according to the amount of the liquid heated. In this way, the pH value of the liquid is effectively increased at least by a prescribed value by heating the liquid with the heating means 6 by the prescribed amount of heat after reaching the boiling point and by releasing a dissolved component such as carbon dioxide, so that the liquid in the container 3 can be improved to be suitable for brewing tea, etc. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric water heater which is used in offices and homes and which improves liquid quality by boiling liquid.

  Conventionally, in this kind of electric water heater, there is one that extends heating after boiling to remove impurities such as chalk (for example, see Patent Document 1).

There is also an electric water heater that can provide delicious water with less chlorine component by lowering the temperature of the steam by providing boiling maintenance means and maintaining the boiling for a long time while reducing the amount of steam generated ( For example, see Patent Document 2).
JP-A-5-154050 Japanese Patent No. 3141706

  However, the conventional electric water heater removes impurities such as liquid chalk contained in the container, but does not improve the liquid quality suitable for extraction of tea or the like. In order to extract tea etc. deliciously, the subject that it was necessary to improve liquid quality more actively occurred.

  The present invention solves the above-mentioned conventional problems, and effectively adjusts the pH value of liquids such as water, hot water, and beverages contained in containers, and actively improves the liquid quality suitable for extraction of tea and the like. An object of the present invention is to provide an electric water heater that can be used.

  In order to solve the above-described conventional problems, an electric water heater of the present invention includes a container that contains a liquid, a heating unit that heats the liquid in the container, a temperature detection unit that detects the temperature of the liquid in the container, and a temperature A control means for controlling the heating means in accordance with the temperature detected by the detection means, and a pH value increasing means for executing a course for increasing the pH value of the liquid by heating a predetermined heating amount by the heating means after reaching the boiling point of the liquid. In the course of increasing the pH value of the liquid, the heating amount is adjusted according to the amount of liquid to be heated.

  Thus, after reaching the boiling point, the heating means is further heated by a predetermined heating amount according to the liquid volume, and the dissolved component such as carbon dioxide gas is released to effectively increase the pH value above a certain value, and the liquid in the container is made tea. The liquid quality suitable for extraction can be improved.

  The electric water heater of the present invention can effectively adjust the pH value of the liquid stored in the container according to the amount of liquid, and can positively improve the liquid quality suitable for extraction of tea or the like.

  According to a first aspect of the present invention, there is provided a container for storing a liquid, a heating means for heating the liquid in the container, a temperature detection means for detecting the temperature of the liquid in the container, and heating according to the temperature detected by the temperature detection means. A control means for controlling the means, and a pH value increasing means for executing a course of increasing the pH value of the liquid by heating a predetermined heating amount by the heating means after reaching the boiling point of the liquid, The electric water heater is designed to adjust the heating amount according to the amount of liquid to be heated. As a result, after reaching the boiling point, the heating means is further heated by a predetermined heating amount according to the liquid amount, and dissolved components such as carbon dioxide gas are released to effectively increase the pH value above a certain value, and the liquid in the container is made tea. The liquid quality suitable for extraction can be improved. Accordingly, when a beverage such as tea is added, the extraction of tea components can be promoted and a delicious beverage can be provided by improving the liquid quality suitable for the extraction.

  In the second invention, in particular, in the first invention, in the course of increasing the pH value of the liquid, the heating amount is changed according to the amount of the additional liquid, thereby adding the minimum amount of heating according to the amount of the additional liquid. In addition, the amount of power consumed and the amount of steam generated at the time of boiling can be minimized and the liquid quality can be improved effectively.

  According to a third aspect of the present invention, there is provided a container for storing a liquid, a heating means for heating the liquid in the container, a temperature detection means for detecting the temperature of the liquid in the container, and heating according to the temperature detected by the temperature detection means. A control means for controlling the means, a pH value increasing means for performing a course of increasing the pH value of the liquid by heating the liquid by a predetermined heating amount after reaching the boiling point of the liquid, and a pH for detecting the pH value of the liquid in the container An electric water heater equipped with a value sensor. As a result, while the pH value is detected by the pH value sensor, the liquid in the container can be heated until the pH value becomes a constant value, and the optimum pH for extraction of tea or the like regardless of the liquid quality or liquid volume. Hot water adjusted to the value can be provided.

  In a fourth aspect of the invention, in particular, in the third aspect of the invention, the course of increasing the pH value of the liquid is controlled by adjusting the amount of heating in accordance with the pH value of the liquid, so that the pH value detected by the pH value sensor Since heating is performed until the predetermined pH value is reached while adjusting the heating amount, it is possible to provide hot water adjusted to a pH value optimum for extraction of tea or the like regardless of the liquid quality or the liquid amount.

  In the fifth aspect of the invention, in particular, in the third or fourth aspect of the invention, in the course of increasing the pH value of the liquid, the heating is terminated when the rate of change of the pH value becomes a certain value or less, whereby the pH value by heating The heating is terminated in a state where the rise in the pressure is close to saturation, and the liquid quality can be improved effectively while minimizing the energy consumption due to heating and the generation of steam due to boiling.

  In the sixth invention, in particular, in any one of the third to fifth inventions, the pH value sensor can be detected regardless of the amount of liquid in the container by being installed at the bottom of the container. .

  In the seventh aspect of the invention, in particular, in any one of the third to sixth aspects of the invention, the liquid pH value increasing course may be performed for tea, coffee, etc. by continuing heating to the pH value set for each menu. Hot water adjusted to an optimal pH value preset for each beverage can be provided.

  In the eighth invention, in particular, in any one of the third to seventh inventions, by providing a pH value display means for displaying the pH value of the liquid, the user can easily know the degree of change in the liquid quality. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 and 2 illustrate an electric water heater according to Embodiment 1 of the present invention.

  As shown in FIG. 1, this electric water heater includes a body 1, a bottomed cylindrical container 3 for storing a liquid (water) 2, an upper frame 4 placed above the body 1, and an upper opening of the container 3. A lid 5 that covers the opening and closing part, a heating means 6 for heating and keeping the liquid 2 in the container 3, a temperature detection means 7 such as a thermistor for detecting the temperature of the liquid in the container 3, and a temperature detection means A control unit 8 for controlling the heating unit 6 according to the temperature detected by the unit 7, and a pH value for executing a course of increasing the pH value of the liquid 2 by further heating the heating unit 6 by a predetermined heating amount after reaching the boiling point of the liquid 2. And increasing means 10. In the course of increasing the pH value of the liquid, the heating amount is adjusted according to the amount of liquid to be heated. The liquid amount is detected from the temperature increase gradient of the liquid temperature to be heated. Details will be described later.

  Here, the arrangement position of the heating means 6 is not particularly limited, such as the bottom of the container 3, the side surface, or the liquid 2. Here, the heating means 6 is a heating wire heater composed of a main heater 6a and a heat retaining heater 6b, the area of the heating part of the heater is 140 square centimeters, and the heater input is 835W for the main heater 6a and 75W for the heat retaining heater 6b, for a total of 910W. did.

  Further, the pH value increasing means 10 is provided with a dedicated key for selecting switching of pH value increase in an operation section (described later) on the upper frame 4.

  Next, the operation of the electric water heater in this embodiment will be described.

  In the illustrated electric water heater, as is generally well known, the lid 5 is opened and the liquid 2 is put into the container 3, and the liquid 2 is heated and kept warm. Thus, it can be appropriately discharged from the discharge port 12b through the outlet pipe 12a.

  The liquid 2 is heated by the heating means 6, and after the boiling is detected by the temperature detecting means 7, when the pH value increasing course is selected by the pH value increasing means 10, the liquid 2 is further heated by the heating means 6 with a constant heating amount. And kept at a constant temperature (60 ° C. to 98 ° C.).

  FIG. 2 shows the relationship between the heating time and the temperature of the liquid 2 when the electric water heater is heated in this embodiment. At the time of boiling water, the main heater 6a and the heat retaining heater 6b are used to boil the water at a constant heating amount. Therefore, until the boiling point is reached, the temperature rise gradient Δθ / ΔT of the liquid 2 in the container 3 is in inverse proportion to the liquid amount and constant. It becomes the value of. Thus, by detecting the amount of liquid, the boiling state continues by heating at a heating amount corresponding to the liquid amount of the liquid after the boiling detection, and the carbon dioxide dissolved in the liquid 2 is proportional to the amount of heat applied. Release is promoted.

  That is, the property of the liquid 2 shifts to the alkali side, and when the liquid 2 is used, when a beverage such as tea, tea, or coffee is added, the extraction power increases, and a delicious beverage can be provided. In addition, when cooking a boiled food using the liquid 2 shifted to the alkali side, there is an effect that the time for boiling is quick and well boiled.

  Further, in the course of increasing the pH value of the liquid in the present embodiment, when the additional liquid is supplied, the temperature of the added liquid is detected by detecting the temperature increase gradient Δθ / ΔT, and heating is performed according to the additional liquid amount. I try to change the amount. As a result, the required minimum amount of heating is added according to the amount of additional liquid, and the amount of power consumed and the amount of steam generated during boiling can be minimized to effectively improve the liquid quality.

(Embodiment 2)
3 to 6 illustrate an electric water heater according to the second embodiment of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 3, the electric water heater includes a pH value sensor 13 that detects the pH value of the liquid 2 at the inner bottom of the container 3. This is different from the first embodiment and the other is the same.

  With this configuration, the pH value of the liquid 2 in the container 3 can be heated to a constant value while detecting the pH value by the pH value sensor 13, and tea or the like can be extracted regardless of the liquid quality or the liquid amount. Hot water adjusted to an optimum pH value can be provided.

  In the present embodiment, the pH value sensor 13 is provided on the inner bottom of the container 3, but is not particularly limited.

  In the course of increasing the pH value of the liquid in the present embodiment, the heating amount is adjusted according to the pH value of the liquid 2. As a result, heating is performed until the predetermined pH value is reached while adjusting the amount of heating to the liquid 2 based on the pH value detected by the pH value sensor 13, so that tea or the like can be extracted regardless of the liquid quality or amount. Hot water adjusted to an optimum pH value can be provided.

  FIG. 4 shows the relationship between the heating amount of the electric water heater in this embodiment and the pH value. The liquid pH value increasing course in this embodiment detects the change rate ΔH / ΔT of the pH value. The heating is terminated when the change rate ΔH / ΔT of the pH value becomes a certain value or less. As a result, heating can be terminated in a state where the increase in pH value due to heating is close to saturation, and liquid quality can be improved effectively while minimizing energy consumption due to heating and generation of steam due to boiling. .

  FIG. 5 shows the operation unit 9 of the electric water heater in the present embodiment, and the operation unit 9 is provided with a menu display means 18. In the present embodiment, a menu is selected by a key operation (for example, a selection key) of the operation unit 9, and heating is continued to a pH value set for each menu. Thereby, the hot water adjusted to the optimal pH value preset for every drink, such as tea and coffee, can be provided. The operation unit 9 is provided with a dedicated key 10a for selecting switching of pH value increase as the pH value increasing means 10 described above.

  FIG. 6 is provided with pH value display means 19 for displaying the pH value on the operation unit 9 of the electric water heater in the present embodiment. Thereby, the pH value detected by the pH value sensor 13 is displayed on the pH value display means 19. Therefore, the user can easily know the degree of change in liquid quality.

  As described above, the electric water heater according to the present invention can effectively adjust the pH value of the liquid stored in the container according to the amount of liquid, and can positively improve the liquid quality suitable for extraction of tea or the like. Therefore, the present invention can be applied not only to so-called pots, but also to devices that can be used for boiling water, that is, devices that are intended for heating / cooking mainly contained items such as rice cookers, heat-retaining cookers, and water heaters.

Vertical sectional view of the electric water heater in Embodiment 1 of the present invention Relationship diagram showing the relationship between heating time and liquid temperature of the electric water heater The longitudinal cross-sectional view of the electric water heater in Embodiment 2 of this invention Relationship diagram showing the relationship between the heating amount and pH value of the electric water heater (A) Perspective view showing the operation part of the electric water heater (b) Enlarged plan view of the operation part showing the menu display means of the electric water heater The enlarged plan view of the operation part which shows the pH value display means of the electric water heater

Explanation of symbols

2 Liquid 3 Container 6 Heating means 7 Temperature detecting means 8 Control means 9 Operating section 10 pH value increasing means 13 pH value sensor 18 Menu display means 19 pH value display means

Claims (8)

A container for storing liquid, a heating means for heating the liquid in the container, a temperature detection means for detecting the temperature of the liquid in the container, and a control means for controlling the heating means in accordance with the temperature detected by the temperature detection means And a pH value increasing means for executing a course of increasing the pH value of the liquid by heating a predetermined heating amount by the heating means after reaching the boiling point of the liquid, the pH value increasing course of the liquid depending on the amount of liquid to be heated Electric water heater that adjusts the amount of heating. The electric water heater according to claim 1, wherein the course of increasing the pH value of the liquid changes a heating amount according to the amount of the additional liquid. A container for storing liquid, a heating means for heating the liquid in the container, a temperature detection means for detecting the temperature of the liquid in the container, and a control means for controlling the heating means in accordance with the temperature detected by the temperature detection means And a pH value increasing means for executing a course of increasing the pH value of the liquid by heating a predetermined heating amount by the heating means after reaching the boiling point of the liquid, and a pH value sensor for detecting the pH value of the liquid in the container. Electric water heater. The electric water heater according to claim 3, wherein in the course of increasing the pH value of the liquid, the heating amount is adjusted according to the pH value of the liquid. The electric water heater according to claim 3 or 4, wherein, in the course of increasing the pH value of the liquid, the heating is terminated when the rate of change of the pH value becomes a certain value or less. The electric water heater according to any one of claims 3 to 5, wherein the pH value sensor is installed at the bottom of the container. The electric water heater according to any one of claims 3 to 6, wherein in the course of increasing the pH value of the liquid, heating is continued to a pH value set for each menu. The electric water heater according to any one of claims 3 to 7, further comprising pH value display means for displaying the pH value of the liquid.

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