JP5195252B2 - Electric water heater - Google Patents

Description

  The present invention relates to an electric water heater.

  Conventionally, in this type of electric water heater, after the power supply to the main body is shifted from the commercial power supply to the backup power supply, the hot water temperature display is a predetermined temperature display when the commercial power supply ends. It was made to maintain time (for example, refer patent document 1).

According to such a conventional electric water heater, flickering of the hot water temperature display is prevented by maintaining the temperature display when the supply of the commercial power is completed for a predetermined time after shifting to the power supply by the backup power supply. It is possible to eliminate a sense of incongruity and improve usability.
Japanese Patent No. 3606248

  However, in the configuration of the conventional electric water heater, the user is not necessarily near the main body when the hot water is locked during power supply by the backup power source, so the probability that the user actually sees the temperature display is low, and consumption As a power reduction measure, the temperature display is updated by the display means every predetermined time, so that the latest liquid temperature is not always displayed. On the contrary, when the hot water lock is released, since the user actually sees the temperature display, it is necessary to always display the latest liquid temperature. For this reason, when the hot water lock is released at the timing immediately before the update when the latest liquid temperature is not displayed at the time of the hot water lock and the temperature display is updated at the next update, the hot water temperature display is switched to the latest The display is updated to the liquid temperature.

  In other words, it is an operation that changes the temperature of the water in the container of the electric kettle. Therefore, there is a problem that the user actually sees switching of the temperature display, there is a sense of incongruity regarding the hot water temperature display during power supply by the backup power source, and the usability is not good.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an electric water heater that prevents flickering of hot water temperature display during power supply by a backup power source, eliminates a sense of incongruity, and improves usability. .

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 source that heats the container, a temperature detection unit that detects the temperature of the liquid, and the temperature detection unit. Display means for displaying the detected temperature of the liquid, control means for controlling the display means and the heating source, a pump for discharging the liquid in the container to the outside of the container, and a hot water lock for releasing A lock release switch; a hot water switch for driving the pump when the hot water lock is released; and a backup power source for supplying power to the control means when commercial power is not supplied. While power is being supplied from the power source to the control means, the temperature table by the display means until a predetermined time elapses after the hot water lock is released by the lock release switch. The temperature display when the hot water lock is released with the lock release switch is maintained and the power consumption of the backup power source can be reduced while the power is supplied by the backup power source. It is possible to improve usability by eliminating the uncomfortable feeling that the hot water temperature display is switched when the lock is released.

  The electric water heater of the present invention does not update the temperature display by the display means for a predetermined time, and maintains the temperature display when the hot water lock is released by the lock release switch when the hot water is locked during power supply by the backup power source. , Flickering of hot water temperature display can be prevented, and discomfort can be eliminated.

  1st invention is a display which displays the temperature of the said liquid detected by the container which accommodates the liquid, the heating source which heats the said container, the temperature detection means which detects the temperature of the said liquid, and the said temperature detection means Means, control means for controlling the display means and the heating source, a pump for discharging the liquid in the container to the outside of the container, a lock release switch for releasing the hot water lock, and the hot water lock is released. A hot water switch for driving the pump when the power is being supplied, and a backup power supply for supplying power to the control means when commercial power is not being supplied, while supplying power to the control means from the backup power supply, The temperature display by the display means is not updated until a predetermined time elapses after the hot water lock is released by the lock release switch, and the outlet The temperature display when the lock is released is maintained so that the power consumption of the backup power supply can be reduced while power is being supplied from the backup power supply. Ease of use can be improved.

  The second aspect of the invention is the display means of the first aspect of the invention, in which the elapsed time since the hot water lock is released by the lock release switch is displayed, and after the hot water lock is released by the lock release switch. Since the elapsed time can also be known, the convenience and functionality of the display means can be improved.

  In particular, the third aspect of the invention includes storage means for storing the temperature of the liquid when the hot water lock is released by the lock release switch of the first or second invention, and the hot water lock is released by the lock release switch. When the temperature of the liquid detected by the temperature detecting means changes by more than a predetermined temperature from the temperature stored in the storage means during a period after a predetermined time elapses, the temperature display by the display means is updated. For example, by adding water immediately after releasing the hot water lock with the lock release switch, if there is a change over a predetermined temperature, the display is updated even if the predetermined time has not passed, The convenience of the display means can be improved.

  In the fourth aspect of the invention, in particular, when the hot water lock is released by the lock release switch of the third aspect of the invention, if no temperature data is stored in the storage means, the temperature by the display means can be obtained even if a predetermined time has not elapsed. The display is updated.For example, when the temperature of the liquid detected by the temperature detection means varies immediately before releasing the hot water lock with the lock release switch and there is no temperature data, the input from the lock release switch is Immediately after acceptance, when the temperature detected by the temperature detecting means is stable and temperature data is obtained, the display is updated even if the predetermined time has not elapsed, thereby avoiding the state of no temperature display for a predetermined time. it can.

  The fifth aspect of the invention is particularly provided with an amount detecting means for detecting the amount of liquid in the container of the fourth aspect of the invention, and during a predetermined time, according to the amount of liquid detected by the amount detecting means, by the display means. The temperature display is corrected, and it is possible to correct the temperature display by the display means during the predetermined time when the temperature display is maintained when the hot water lock is released with the lock release switch. Appropriate temperature display according to the amount of water inside can be performed.

In the sixth invention, in particular, the temperature display by the display means of any one of the first to fifth inventions is performed by blinking, and the energization time to the display means is shortened and the power consumption is reduced. be able to.

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

(Embodiment 1)
FIG. 1 is a schematic diagram showing a configuration of an electric water heater according to the first embodiment of the present invention.

  In FIG. 1, 1 is a power plug for supplying commercial power, 2 is a container for storing a liquid to be heated, 3 is a heating source for heating the container 2 comprising two heaters of 925 W and 75 W, 4 Is a temperature detection means for detecting the temperature of a liquid such as water in the container 2, 5 is a display means for displaying the temperature of the liquid in the container 2, and 7 is a temperature control control of the liquid in the container 2. The temperature selection input means 6 for changing the set temperature is based on the temperature control temperature of the liquid in the container 2 selected by the temperature selection input means 7 and a lock release switch 16 to be described later. The control means 17 for controlling 3 is a backup power supply composed of a primary battery for supplying power to the control means 6 when commercial power is not supplied.

  Note that the liquid in the container 2 is discharged from the discharge port 13 through the pipe 12 by the pump 11 regardless of whether commercial power is supplied, and 15 is for driving the pump 11 when unlocked. The hot water switch 16 is a lock release switch for releasing the hot water lock.

  When the hot water switch 15 is turned on while the hot water lock is released, the pump 11 is driven. Reference numeral 8 denotes elapsed time measuring means for measuring an elapsed time after the hot water lock is released by the lock release switch 16 while power is being supplied by the backup power source 17.

  The operation and action of the electric water heater in the present embodiment configured as described above are as follows.

  When the power plug 1 is inserted into an indoor outlet (not shown) and commercial power is supplied, first, the temperature of the liquid in the container 2 is detected by the temperature detecting means 4, and the detected temperature is low. The control means 6 controls the heating source 3 to start heating the liquid in the container 2. When the detected temperature is high, the control means 6 controls the heating source 3 to keep the liquid in the container 2 warm. At this time, the control means 6 controls the display means 5 to display the temperature of the liquid detected by the temperature detection means 4.

  Here, when the commercial power supply is not supplied due to the power plug 1 being unplugged or the like, the control means 6 turns off the power supply to the heating source 3 and stops heating or keeping the temperature of the liquid in the container 2. Then, after the commercial power is not supplied, the backup power supply 17 can operate, and the power is supplied, and the control means 6 continues to display the temperature detected by the temperature detection means 4 on the display means 5. . However, after the commercial power supply is stopped, the temperature display that displays the temperature detected by the temperature detecting means 4 on the display means 5 is a measure to reduce the power consumption of the backup power supply 17 during the hot water lock. It is performed every predetermined time (in this embodiment, 30 seconds). Here, when the hot water lock is released by the lock release switch 16 while the hot water is locked after the commercial power is not supplied, the hot water lock is released.

At this time, the elapsed time measuring means 8 measures the elapsed time after the hot water lock is released by the lock release switch 16, and the display temperature is maintained until a predetermined time (5 seconds in the present embodiment) elapses. The temperature display when the hot water lock is released is maintained, and after 5 seconds, the display unit 5 can update the temperature display.

  As described above, according to the present embodiment, for a predetermined time (5 seconds) after the hot water lock is released, the commercial power supply is maintained by maintaining the display of the temperature when the hot water lock is released. Since the temperature display is updated about every 30 seconds after the supply hot water is locked, the power consumption of the backup power source 17 can be reduced, and the temperature by the display means 5 immediately after the hot water lock is released. There is no sense of incongruity that the display changes.

  If the display means 5 displays not only the temperature of the liquid but also the time measured by the elapsed time measuring means 8, the user can unlock the lock release switch 16 in addition to the temperature of the liquid in the container 2. Thus, the elapsed time after releasing the hot water lock can be known, and the state of the liquid in the container 2 can be easily imagined, and the convenience of display can be improved.

(Embodiment 2)
FIG. 2 is a schematic diagram showing a configuration of an electric water heater according to the second embodiment of the present invention. In addition, about the same component as the electric water heater in the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted and only a different part is demonstrated.

  The difference from the first embodiment is that a storage means 9 for storing the temperature when the hot water lock is released is newly provided to maintain the temperature display when the hot water lock is released. When the temperature detected by the temperature detecting means 4 rises or falls from the temperature stored in the storage means 9 by a predetermined temperature (20 ° C. in this embodiment) or more, the temperature display update for a predetermined time is prohibited. In addition, the temperature display is updated by the display means 5.

  With such a configuration, even if a liquid is added to the container 2 immediately after the hot water supply lock is released while power is being supplied by the backup power supply 17, the control means 6 immediately responds to the temperature of the liquid after the liquid is added. Display can be performed by the display means 5 and the convenience of display can be improved.

  Further, when power is being supplied by the backup power source 17 and the temperature display is maintained immediately after the hot water lock is released, if the temperature data is not stored in the storage means 9, the temperature display is displayed by the display means 5. You may make it update. By doing so, for example, when the temperature detected by the temperature detection means 4 fluctuates and temperature data is not fixed, the hot water supply lock is released and the hot water lock is released while the backup power supply 17 is supplying power. If the temperature detected by the temperature detecting means 4 is stable and the temperature data is determined while maintaining the temperature display immediately after the temperature display, it is possible to avoid the state where there is no temperature display. The convenience and function of display can be improved.

(Embodiment 3)
FIG. 3 is a schematic diagram showing a configuration of an electric water heater according to the third embodiment of the present invention. In addition, about the same component as the electric water heater in the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted and only a different part is demonstrated.

  The difference between the present embodiment and the first embodiment is that the container 2 is based on the rising gradient of the temperature detected by the temperature detection means 4 when the liquid in the container 2 is heated by the heating source 3. An amount detecting means 10 for detecting the amount of liquid in the inside is provided, and the control means 6 is maintaining the temperature display immediately after the hot water lock is released and the hot water lock is released while the backup power supply 17 is supplying power. The temperature display by the display unit 5 is corrected according to the amount of liquid detected by the amount detection unit 10.

  Specifically, when the amount of liquid is small, the display temperature is corrected to be low, and when the amount of liquid is large, the display temperature is corrected to be high.

  With the above-described configuration, it is possible to display an appropriate temperature according to the amount of liquid in the container 2 immediately after the hot water supply lock is released while power is being supplied by the backup power source 17. The amount detection means 10 in the present embodiment detects the amount of liquid in the container 2 based on the temperature detected by the temperature detection means 4, but detects the amount of liquid in the container 2 by a different method. The same effect can be obtained with the configuration.

  In each of the above embodiments, the temperature is continuously displayed on the display means 5, but may be displayed by blinking (for example, 1 second ON, 1 second OFF). In particular, in the latter case, since the lighting time of the display means 5 is reduced, power consumption can be reduced.

  As described above, the electric water heater according to the present invention displays the temperature display when the hot water lock is released for a predetermined time after the hot water lock is released with the lock release switch when the hot water is locked while the power is supplied by the backup power source. Maintaining it prevents flickering of hot water temperature display, eliminates the sense of incongruity, and improves usability, so many home appliances including built-in type water heaters, etc. It can also be applied to devices that display liquid temperature.

The schematic diagram which shows the structure of the electric water heater in Embodiment 1 of this invention. The schematic diagram which shows the structure of the electric water heater in Embodiment 2 of this invention. The schematic diagram which shows the structure of the electric water heater in Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power plug 2 Container 3 Heating source 4 Temperature detection means 5 Display means 6 Control means 7 Temperature selection input means 8 Elapsed time measurement means 9 Storage means 10 Quantity detection means 11 Pump 16 Lock release switch 17 Backup power supply

Claims (6)

A container containing liquid, a heating source for heating the container, temperature detecting means for detecting the temperature of the liquid, display means for displaying the temperature of the liquid detected by the temperature detecting means, and the display means And a control means for controlling the heating source, a pump for discharging the liquid in the container to the outside of the container, a lock release switch for releasing the hot water lock, and the pump when the hot water lock is released. A hot water switch for driving, and a backup power source that supplies power to the control means when commercial power is not supplied, and the hot water is supplied by the lock release switch while power is being supplied from the backup power source to the control means. Until the predetermined time has passed since the lock was released, the temperature display by the display means is not updated, and the hot water lock is released by the lock release switch. Electric kettle which is adapted to maintain the temperature display when. The electric water heater according to claim 1, wherein the display means displays an elapsed time after the hot water lock is released by the lock release switch. Storage means for storing the temperature of the liquid when the hot water lock is released by the lock release switch, and the temperature detection means is configured to wait until a predetermined time elapses after the hot water lock is released by the lock release switch. The electric water heater according to claim 1 or 2, wherein the temperature display by the display means is updated when the detected temperature of the liquid changes by a predetermined temperature or more from the temperature stored in the storage means. The temperature display by the display means is updated even if the predetermined time has not passed when the temperature data is not stored in the storage means when the hot water lock is released by the lock release switch. Electric water heater. 5. The apparatus according to claim 4, further comprising an amount detection means for detecting the amount of liquid in the container, wherein the temperature display by the display means is corrected according to the amount of liquid detected by the amount detection means during a predetermined time. Electric water heater. The electric water heater according to any one of claims 1 to 5, wherein the temperature display by the display means is blinked.

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