JP2007000329A - Electric water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provider an electric water heater which drastically shortens the boiling time of water while a power source breaking motion is avoided. <P>SOLUTION: The electric water heater is equipped with a thermal insulation control section 8 which has two sorts of control temperatures of a first prescribed temperature and a second prescribed temperature which is lower than the above, a liquid addition sensing means 9 which senses the existence of the liquid addition at the time of the warm tone control, an automatic heating control means 10 which moves the warm tone control at the second prescribed temperature to the same at the first prescribed temperature to heat the liquid when the liquid addition is sensed, and an avoidance control means 13 which controls the rate of current application to a heating means 5, wherein the heating is executed by the continuous current application for a prescribed time from the start of the heating by the automatic heating control means 10 and the heating is executed by controlling the rate of the current application by the avoidance control means 13 after the passage of the prescribed time. Thereby, the heating can be executed by both the continuous current application and the rate of the current application control so that the efficient water boiling can be executed and the maneuverability is improved by drastically shortening the boiling time of water while the power source breaking motion is avoided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric water heater that learns the use situation of a user and automatically performs temperature control of hot water based on the learned result.

  Conventionally, this kind of electric water heater learns the actual usage of the user, and based on the learning data, the hot water temperature maintenance operation desired by the user is stopped during the use time, and the hot water heating operation is stopped during the non-use time Or it is suppressing (for example, refer patent document 1).

According to this electric water heater, since the heating operation to the hot water is automatically stopped or suppressed during the non-use time period, the energy-saving automatic operation can be performed without trouble and with high accuracy.
JP 2003-284644 A

  However, in the conventional configuration, during heating of the liquid when shifting from the non-use time zone to the use time zone, the energization is always performed by the fixed on / off duty control in order to avoid the power breaker operation. . For this reason, when it is not necessary to avoid the operation of the power breaker, the heating time becomes long 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 shortens a water heater time as much as possible while avoiding a power breaker operation.

  In order to solve the conventional problem, the electric water heater of the present invention has at least two control temperatures of a first predetermined temperature and a second predetermined temperature lower than the first predetermined temperature. A heat retention control unit that learns the usage pattern of the battery, selects one of the two control temperatures based on the learned result, and controls energization of the heating means based on the selected control temperature; and a second predetermined temperature The liquid addition detecting means for detecting the presence / absence of liquid addition at the time of temperature control and the addition of the liquid based on the signal input from the liquid addition detecting means, from the second predetermined temperature to the first predetermined temperature. The automatic heating control means for heating the liquid by the heating means by shifting to the temperature control control, and the avoidance control means for controlling the energization rate to the heating means by the input of the automatic heating control means, the automatic heating control means After starting heating Time was heated by continuous current, is to heat by controlling the duty factor by the after a predetermined time elapses avoidance control means.

  This makes it possible for the water heater operation to avoid the power breaker operation to be continuously energized by the automatic heating control means for a predetermined time from the start of the water heater, and to be heated by the power supply rate control by the avoidance control means after the predetermined time has elapsed. This makes it possible to shorten the time for boiling the water as much as possible, while making it possible to make the kettle more efficiently and to improve usability.

  The electric water heater of the present invention can reduce the time for water heating as much as possible while avoiding the operation of the power breaker, can make the water heater more efficient and is easy to use.

  The first invention has at least two control temperatures of a first predetermined temperature and a second predetermined temperature lower than the first predetermined temperature, learns the usage pattern of the user, Based on the selected control temperature, one of the two control temperatures is selected, and a heat retention control unit that controls the energization of the heating means based on the selected control temperature, and detects whether or not liquid is added during temperature control at the second predetermined temperature. When the addition of the liquid is detected based on the liquid addition detection means to be performed and a signal input from the liquid addition detection means, the temperature is controlled from the second predetermined temperature to the temperature control at the first predetermined temperature to heat the liquid. Automatic heating control means for heating by means, and avoidance control means for controlling the energization rate to the heating means by input of the automatic heating control means, and heating by continuous energization for a predetermined time after the start of heating by the automatic heating control means The specified time has elapsed By using an electric water heater that controls the energization rate by the avoidance control means and heats it, the water heater operation that avoids the power breaker operation is continuously energized by the automatic heating control means for a predetermined time from the start of the water boiling, and is avoided after the predetermined time has elapsed. Heating can be performed by energization rate control by the control means, and the time for boiling the water can be shortened as much as possible while avoiding the power breaker operation, so that more efficient boiling can be performed and the usability is improved.

  According to the second invention, in particular, in the first invention, the predetermined time is changed and set according to the power watt of the other electric device, so that the power watt of the other device used by the user in combination is set. Since it is possible to set the predetermined time by calculating from the total wattage, it is possible to perform boiling in an optimum time, and it is not necessary for the user to be aware of the combined use with other devices, and the usability can be improved.

  The third aspect of the invention is particularly optimal in the first aspect of the invention because the predetermined time is determined based on the electrical characteristics of the power breaker, so that the predetermined time can be set according to the electrical characteristics of the power breaker. Water heating can be performed in time, and the user does not need to be aware of the operation of the power breaker when used in combination with other devices, thereby improving usability.

  According to a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, from the second predetermined temperature to the first predetermined temperature at which liquid addition is detected based on a signal input from the liquid addition detecting means. When the control is switched to the temperature control at, temperature control is performed at the second predetermined temperature by including additional non-detection heating control means for heating the liquid to a third predetermined temperature higher than the first predetermined temperature by the heating means. If the addition of water to the extent that automatic boiling does not occur at the time of control is not detected, when the temperature is changed from the second predetermined temperature to the temperature control at the first predetermined temperature, the liquid is made to be lower than the first predetermined temperature. By raising the temperature to a high third predetermined temperature, the heat retention and stabilization time at the first predetermined temperature can be shortened, and the user does not need to be aware of the operation of the power breaker when used in combination with other devices. Can do well.

  According to a fifth aspect of the invention, in particular, in any one of the first to third aspects of the invention, by having continuous energization display means for displaying that the energization is continued for a predetermined time after the heating is started by the automatic heating control means. Since the user can be informed that continuous energization is being performed for a predetermined time after the start of heating, the user can avoid the combined use with other devices in advance and can prevent the overcurrent from being used in advance. .

  In a sixth aspect of the invention, in particular, in any one of the first to fifth aspects of the invention, the avoidance control heating display means for displaying that heating is performed to control the energization rate after a predetermined time has elapsed by the avoidance control means. It is possible to inform the user that heating is in progress to control the energization rate after elapse of a predetermined time, so it is necessary to avoid the combined use with other devices unless it is an electric device with particularly high electric energy. Eliminates and improves usability.

  The seventh invention has mode change input means for changing the heating control mode in any one of the first to sixth inventions, and mode change input means during continuous heating of the liquid by the automatic heating control means. Even when receiving a signal from, the control of continuous energization to the heating means is continued until the predetermined time has elapsed, so that the user can change the heating control mode without being aware of the combined use with other devices. In addition, if the kettle is continued at that time, the kettle can be carried out in an optimum time, and the usability can be improved.

  The eighth invention has mode change input means for changing the heating control mode, particularly in any one of the first to sixth inventions, and from the mode change input means during heating of the liquid by the avoidance control means. Even when a signal is received, the control of the energization rate to the heating means is continued, so that the user can change the heating control mode without being aware of the combined use with other devices, which improves usability. can do.

  The ninth invention has a temperature selection input means for changing the first predetermined temperature in any one of the first to eighth inventions, and the temperature is selected during continuous heating of the liquid by the automatic heating control means. Even when a signal from the input means is received, the control of continuous energization to the heating means is continued until the predetermined time has elapsed, so that the user can adjust the set temperature without being aware of the combined use with other devices. Changes can be made and usability can be improved.

  The tenth invention has temperature selection input means for changing the first predetermined temperature, particularly in any one of the first to eighth inventions, and the temperature selection input means while the liquid is heated by the avoidance control means. By continuing to control the power supply rate to the heating means when receiving a signal from the user, the user can change the set temperature without being aware of the combined use with other devices. At that time, if the kettle is continued, the kettle can be carried out in an optimum time, and the usability can be improved.

  In an eleventh aspect of the invention, in particular, in any one of the first to tenth aspects of the invention, based on a signal input from the liquid addition detection means, when no addition of liquid is detected, it is displayed that no liquid is added. By having the liquid addition non-display means, the user can be informed that no liquid has been added during the low temperature heat retention, and it can be predicted that the liquid will not be heated until boiling the next time when shifting to the high temperature heat retention setting. Therefore, combined use with other devices can be avoided in advance, and usability can be improved.

  In a twelfth aspect of the invention, in particular, in any one of the first to tenth aspects of the invention, when addition of a liquid is detected based on a signal input from the liquid addition detection means, the fact that a liquid has been added is displayed. By having the liquid addition indication means, the user can be informed that the liquid has been added during the low temperature heat retention, and predict whether or not to heat up to boiling when the next high temperature heat retention setting is entered. Therefore, the combined use with other devices can be avoided in advance, and the effect of preventing overcurrent use can be obtained.

  In a thirteenth aspect of the invention, in particular, in any one of the first to twelfth aspects of the invention, by having heating display means for displaying that the liquid is being heated by the automatic heating control means, It is possible to judge whether or not heating is being performed by continuous energization when shifting from a low temperature insulation temperature to a high temperature insulation setting in the operating time zone, and it is possible to avoid the combined use with other devices in advance, making it easy to use Can be improved.

  In a fourteenth aspect of the invention, in particular, in any one of the first to thirteenth aspects, the non-use time zone is provided by including a heating display means for displaying that the liquid is being heated by the additional undetected heating control means. It is possible to determine whether or not heating is in progress to control the energization rate when shifting from the low temperature heat retention temperature to the high temperature heat retention setting in the operating time zone. Avoidance can improve usability.

  In a fifteenth aspect of the invention, in particular, in any one of the first to thirteenth aspects of the invention, by having a heating display means for displaying that the liquid is being heated by the automatic heating control means or the additional undetected heating control means. It is possible to determine whether or not heating is being performed when shifting from a low temperature keeping temperature in a non-use time zone to a high temperature heat keeping setting in a use time zone, and an effect of preventing overcurrent use can be obtained. The effect of making the user easily informed of the driving situation can be obtained.

  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 to 3 show an electric water heater according to Embodiment 1 of the present invention.

  In FIG. 1, 1 is an electric water heater body, 2 is a container for storing a liquid to be heated, 3 is a temperature detection means for detecting the temperature of the liquid in the container 2 attached to the container 2, and 4 is for pumping hot water in the container 2. The discharge means 5 for discharging by means of 5 is a heating means comprising two heaters of 925 W and 75 W, 6 is a use detection means for detecting the actual use of hot water in the container 2 by means of inputs from the heating means 5 and the discharge means 4, 7 Is a storage means for inputting the output from the use detection means 6 at a predetermined cycle (in this embodiment, 20 minutes), and sequentially storing it in a plurality of storage areas, and 8 is a heat retention mode and a boiling mode. In the heat retention mode, there are at least two types of heat retention: a first predetermined temperature (98 ° C. which is a set temperature by the user in the present embodiment) and a second predetermined temperature (60 ° C. in the present embodiment). Thermal insulation control with temperature Then, based on the input from the storage means 7, one of the two heat retention temperatures is selected, and the 75 W heater of the heating means 5 is selected based on the relationship between the input from the temperature detection means 3 and the selected heat retention temperature. The temperature is controlled by turning on and off, and when the water in the container 2 becomes lower than (selected heat retention temperature-5 ° C.) based on the input from the temperature detection means 3 during the heat retention mode, the mode is switched to the boiling mode and heated. When the 925 W heater of means 5 is turned on and boiling is detected, the mode shifts to the heat retention mode. 9 is whether or not there is an addition of water that does not fall below 60 ° C. during the temperature control of the liquid in the container 2 at 60 ° C. (in this embodiment, the time during which the hot water temperature decreases by 5 ° C. is less than 10 seconds) Based on the signal input from the liquid addition detection means 9, the liquid addition detection means 10 detects whether or not the liquid addition is detected, and when the addition of the liquid is detected, the control proceeds from the second predetermined temperature to the temperature control at the first predetermined temperature. In the automatic heating control means for heating the liquid by the heating means 5, specifically, when the heat retention control unit 8 shifts from 60 ° C. to 98 ° C., the input from the liquid addition detection means 9 causes the 60 When the addition of water is detected during the heat retention control at 0 ° C., the operation mode shifts to the automatic boiling mode, and the hot water in the container 2 is heated to boiling by the 925 W heater of the heating means 5. 11 is a boiling setting input means for turning on the 925 W heater of the heating means 5, and 12 is 60 ° C. in response to an input from the liquid addition detection means 9 when the heat insulation control unit 8 shifts from 60 ° C. to 98 ° C. If the addition of water is not detected during the heat retention control, the hot water in the container 2 is moved to the third predetermined temperature (98 ° C., which is the set temperature by the user regardless of the amount of water in this embodiment) by the 925 W heater of the heating means 5. The additional non-detection heating means 13 is added to the function of the automatic heating control means 10 to the function of the automatic heating control means 10, and 13 is 925 W of the heating means 5 by the input from the automatic heating control means 10 or the additional non-detection heating means 12. It is an avoidance control means for controlling the energization rate to the heater (in this embodiment, 15 seconds on and 15 seconds off).

  The operation of the electric water heater configured as described above will be described in more detail with reference to FIG.

  With reference to FIG. 2, control contents of the use detection unit 6, the heat retention control unit 8, the liquid addition detection unit 9, and the automatic heating control unit 10 will be described.

  As shown in FIG. 2, when the electric water heater is turned on, the mode is switched (STEP 1) to the heat retention mode (STEP 2), the boiling mode (STEP 4) or the automatic boiling mode (STEP 3). The usage detection means 6 detects the actual usage of hot water in the container 2 and uses the discharge status by the discharge means 4 and the presence / absence of the boiling operation by the boiling setting input means 11 in units of 20 minutes ( (STEP9, STEP11) Writing into the corresponding area of the storage means 7 (STEP10, STEP12). However, the usage status is written in the unit time zone from 1 to area 72 with 20 minutes as the unit time, including the unit time zone including the discharge time and boiling operation time, and the unit time zone before and after that as the usage time. Assume that bands are stored separately as non-use time. Then, until 24 hours elapses after the reset is released (STEP 13), the heat retention control unit 8 adjusts the temperature of the hot water in the container 2 by 98 ° C. heat retention (STEP 25), that is, 98 ° C. automatic boiling. Based on the temperature (STEP 26), the heat-retaining mode (STEP 27) is maintained or shifted to the boiling mode (STEP 28). If 24 hours have passed since the reset was released (STEP 13), the thermal insulation control unit 8 reads out the accumulated use result of the corresponding area up to the previous day from the storage means 7 (STEP 14), and according to the actual use of the corresponding time zone (STEP 15). If it is a non-use time zone, 60 ° C. heat retention (STEP 16), and if it is a use time zone and the previous time zone is not 60 ° C. heat insulation (STEP 21), 98 ° C. heat insulation control (STEP 25) is performed.

  By the way, while the heat retention control unit 8 is kept at 60 ° C. (STEP 16), the liquid addition detecting means 9 detects whether water has been added to the container 2 (STEP 17), the addition of water is detected, and the water temperature is 60. If it falls below the 60 ° C. automatic boiling temperature, which is 5 ° C. lower than the temperature holding temperature (STEP 18), a signal is output to the heat holding control unit 8 so as to shift to the boiling mode (STEP 20). (STEP 18) A 60 ° C. warming water addition flag is set (STEP 19), and a signal is output to the automatic heating control means 10.

  When the automatic heating control means 10 detects that the actual usage in the corresponding time zone is used (STEP 15) and the previous time zone is 60 ° C. thermal insulation (STEP 21), the automatic heating control means 8 detects the liquid addition detecting means 9. After detecting that water has been added during the 60 ° C. heat retention (STEP 22) based on the input from, after outputting a signal to the liquid addition detection means 9 so as to clear the 60 ° C. heat retention during water addition flag (STEP 23) When shifting to the automatic boiling mode (STEP 24), the operation of the heat retention control unit 8 is stopped until boiling is detected. If no addition of water is detected during the heat retention at 60 ° C. (STEP 22), the operation proceeds to 98 ° C. A signal is output to the heat retention control unit 8 as described above (STEP 27).

  The automatic heating control means 10 turns on the 925 W heater of the heating means 5 in the automatic boiling mode (STEP 3) and heats the hot water in the container 2 until it boils. When boiling is detected (STEP 5), it shifts to the heat retention mode. (STEP 6) A signal is output to the heat retention control unit 8 so as to start the operation. In addition, when the heat retention control unit 8 shifts to the boiling mode (STEP 4), the 925 W heater of the heating means 5 is turned on to heat the water in the container 2 until it boils, and when boiling is detected (STEP 7), the flow proceeds to the heat retention mode. (STEP 8).

  Furthermore, the energization control to the heater in STEP24 and STEP27 will be described in more detail based on FIG. FIG. 3 shows the relationship among the automatic heating control means 10, the additional undetected heating means 12, and the avoidance control means 13.

  When the heat retention control unit 8 shifts from the non-use time zone to the use time zone, that is, from 60 ° C. heat retention to 98 ° C. temperature control, the automatic heating control means 10 receives a signal input from the liquid addition detection means 9, In the automatic boiling mode that shifts when the addition of water that does not fall below 60 ° C. is detected during the 60 ° C. heat retention, the 925 W heater of the heating means 5 is turned on and the hot water in the container 2 is heated until it boils. At this time, the automatic heating control means 10 performs continuous energization heating for a predetermined time (1 minute and 30 seconds in the present embodiment) after the start of heating, and after 1 minute and 30 seconds has elapsed, the avoidance control means 13 causes 15 seconds. The relay is turned OFF (STEP 63) or ON (STEP 64) by intermittent energization (STEP 60, STEP 61, STEP 62) that is ON for 15 seconds, and in the mode branch (STEP 65), in the automatic boiling mode (STEP 66), heating is performed until boiling is detected (STEP 66) In STEP 68), in the automatic temperature control mode (STEP 67), the water temperature is heated to 99 ° C. (STEP 69), and when the heating is completed, a signal is output to the heat retention control unit 8 so as to shift to the heat retention mode.

  In this embodiment, heating is performed up to 99 ° C. regardless of the amount of water. However, by detecting the amount of water, the heating end temperature is changed depending on the water amount detection result, such as 99 ° C. or 98 ° C., depending on the amount of water. You may let them.

  Although the continuous energization time is 1 minute 30 seconds, it may be any continuous energization time such as 2 minutes or 3 minutes depending on the electrical characteristics of the power breaker and the wattage of the heater.

  The energization ratio is 15 seconds on and 15 seconds off. However, depending on the contact life of the relay and the electrical characteristics of the power breaker, any energization ratio such as 10 seconds on 10 seconds off, 30 seconds on 15 seconds off, etc. good.

  In the present embodiment, the first predetermined temperature is 98 ° C., but there may be another temperature such as 85 ° C., and the second predetermined temperature at this time may be 60 ° C. or lower. This temperature varies depending on the configuration. In addition, the first predetermined temperature is single at 98 ° C., but the second predetermined temperature is also 60 ° C. as well as 98 ° C., 85 ° C., 70 ° C., but 85 ° C., 70 ° C., 60 ° C., 55 ° C. A plurality of units such as “° C.” can be provided and can be selected by the user. If there are a plurality of first predetermined temperatures, the temperature control end temperature may be set according to each set temperature.

  In addition, since the learning memory contents are accumulated for two weeks, even in the unit time zone that has been divided from the usage time in the past, it is changed to the non-use time if it is not used for two weeks.

  Also, depending on the availability of the storage area of the microcomputer, in this embodiment, the number of areas is set to 72 in units of 20 minutes, but the actual number of usage for 24 hours is stored by setting the number of areas to 144 in units of 10 minutes. Any number may be used.

  Further, in this embodiment, if it is detected that water is added so as not to fall below 60 ° C. during the heat retention at 60 ° C., the hot water in the container 2 is changed when the temperature control is controlled from 60 ° C. to 98 ° C. However, if it is detected that water has been added, it is possible to heat to boiling immediately, and when shifting from 60 ° C. to 98 ° C. temperature control, only heating is performed and boiling may not be performed.

  Further, in the present embodiment, the case where a backup battery such as a rechargeable battery is used is not particularly described. However, the use detection means 6 continuously detects the actual use of hot water in the container 2 even during the backup. If the learning storage contents can be stored by the storage means 7, it is possible to continuously store the actual usage during the backup.

  In addition, in this embodiment, the time for the hot water temperature to drop by 5 ° C. is set to less than 10 seconds as the threshold value for detecting the addition of water, but this threshold value varies depending on the material and size of the container 2. Therefore, in this case, a threshold value suitable for the container 2 may be set.

  Further, in this embodiment, there is one threshold value for water addition detection regardless of the amount of water, but a plurality of threshold values may be provided depending on the amount of water if there is room in the capacity of the microcomputer.

  In addition, by having continuous energization display means for displaying that a predetermined time is continuously energized after the start of heating by the automatic heating control means 10, the user is informed that the energization is continuously energized for a predetermined time after the start of heating. In addition, by having the avoidance control heating display means for displaying that the heating is controlled to control the energization rate after elapse of a predetermined time by the avoidance control means 13, heating is performed to control the energization rate after elapse of the predetermined time. The user can be notified of this.

  With the configuration as described above, the heat retention control is performed in accordance with the life pattern based on the actual usage of the user or the usage pattern desired by the user, and the container 2 moves from the non-use time zone to the use time zone. When heating the hot water inside, the operation of the power breaker is automatically avoided, while the time for boiling the water can be shortened as much as possible, and the usability can be improved.

(Embodiment 2)
Next, an electric water heater according to Embodiment 2 of the present invention will be described with reference to FIGS.

  In the present embodiment, although already described based on FIG. 1 in the first embodiment, the additional undetected heating means 12 is provided. This is because the function of the automatic heating control means 10 is such that when the heat retention control section 8 shifts from 60 ° C. to 98 ° C., the water added during the heat retention control at 60 ° C. by the input from the liquid addition detection means 9. If addition is not detected, the hot water in the container 2 is heated to a third predetermined temperature by the 925 W heater of the heating means 5 (in this embodiment, the set temperature by the user is 99 ° C., which is 98 ° C. + 1 ° C. regardless of the amount of water). The function to heat up to is added.

  In FIG. 2, the transition to the entrusted temperature control mode (STEP 41) is added as a mode branch (STEP 1) after the power is turned on. (STEP 15), according to a signal that the additional non-detection heating means 12 inputs from the liquid addition detection means 9 when shifting from the non-use time period to the use time period, that is, from 60 ° C. heat retention to 98 ° C. heat retention control (STEP 21). When the addition of water that does not fall below 60 ° C. is not detected during the 60 ° C. heat retention (STEP 22), the operation of the heat retention control unit 8 is stopped at the same time as the transition to the automatic temperature control mode (STEP 44). In addition, in the automatic temperature control mode (STEP 41), the additional undetected heating means 12 turns on the 925 W heater of the heating means 5 to heat the hot water in the container 2 to 99 ° C. (STEP 42), and then shifts to the heat retention mode (STEP 42). (Step 43) A signal is output to the heat retention control unit 8 to start the operation.

  In this embodiment, heating is performed up to 99 ° C. regardless of the amount of water. However, by detecting the amount of water, the heating end temperature is changed depending on the water amount detection result, such as 99 ° C. or 98 ° C., depending on the amount of water. You may let them.

  With the above configuration, if there is no addition of water that does not fall below the low temperature holding temperature during the non-use time zone, the hot water in the container 2 is raised to a temperature higher than the heat holding temperature when shifting to the use time zone. By raising the temperature, the time for keeping the temperature stable can be shortened after shifting to 98 ° C., and when there is no need for boiling, the hot water in the container 2 is not boiled, so there is also an energy saving effect. Usability can be improved.

(Embodiment 3)
4 and 5 show an electric water heater according to Embodiment 3 of the present invention. Since the main configuration is the same as that of the first embodiment, only different parts will be described.

  In the present embodiment, as shown in FIG. 4, mode change input means 14 for inputting a heating control mode change (cleaning mode in the present embodiment) and a first predetermined temperature (98 ° C. in the present embodiment, The temperature selection input means 15 for switching the set temperatures of the two heat retention temperatures of 85 ° C., the boiling setting input means 11, the mode change input means 14, and the temperature selection input means 15, the hot water in the container 2 is heated by the heating means 5. Is newly provided with post-input detection control means 16 for adjusting the temperature of the liquid or boiling it.

  The operation of the electric water heater configured as described above will be described in more detail with reference to FIG. FIG. 5 shows the relationship among the heating means 5, mode change input means 14, temperature selection input means 15, and post-input detection control means 16.

  This embodiment is different from the first embodiment in that the hot water in the container 2 is continuously energized for 1 minute 30 seconds or intermittently energized 15 seconds on 15 seconds off (STEP 60, When heating is performed by turning the relay OFF (STEP 63) or ON (STEP 64) in STEP 61 and STEP 62), if there is an input from the mode change input means 14 (STEP 80), the mode transition is performed (STEP 81). Even after branching (STEP 82), the mode is changed to the cleaning mode (STEP 85), or when the set temperature is changed from 98 ° C. to 85 ° C. or 85 ° C. to 98 ° C. (STEP 81). By inputting a signal to the heating means 5 by the control means 16 after detecting the input, In the boiling mode (STEP 66), until boiling (STEP 67), in the cleaning mode (STEP 85), until the cleaning mode is completed (STEP 86), or in the automatic temperature control mode (STEP 67) for 1 minute and 30 seconds during continuous energization Until continuous energization is completed or when the automatic temperature control mode is set to 98 ° C., 99 ° C. (STEP 69), and 85 ° C. to 86 ° C. (STEP 84). Is heated by turning the relay off (STEP 63) or ON (STEP 64) by intermittent energization (STEP 60, STEP 61, STEP 62) of 15 seconds on and 15 seconds off.

  In this embodiment, the cleaning mode is selected as the mode change. However, a strong decoloring mode in which the decoloring operation is forcibly performed by intermittent energization of the heater for about 6 minutes after the completion of boiling, or a program automatically after the completion of boiling. It is possible to perform a low temperature heat retention control only for a set time, or a timer water heater mode for performing heater energization cutoff control.

  In addition, intermittent energization is continued until boiling once, but the user intentionally switches the mode, so if measures for the power breaker are not required, the intermittent energization is not continued when the mode is switched. It may be changed to energization or may be changed so as to increase the energization rate and continue intermittent energization.

  With the configuration as described above, it is assumed that there is a mode transition such as switching of the set temperature and transition to the cleaning mode while hot water in the container 2 is automatically heated by intermittent energization in order to avoid the operation of the power breaker. However, since the operation of the power breaker is automatically avoided, the user does not need to be aware of the combined use with other devices, and the usability can be improved.

(Embodiment 4)
6 and 7 show an electric water heater according to Embodiment 4 of the present invention. Since the main configuration is the same as in the first and third embodiments, only different parts will be described.

  In the present embodiment, as shown in FIG. 6, whether or not water is added that does not fall below 60 ° C. during the 60 ° C. heat retention control is displayed by input from the liquid addition detection means 9 (LCD display in this embodiment). This means that a water addition presence / absence display means 17 is newly provided.

  The operation of the electric water heater configured as described above will be described in more detail with reference to FIG. FIG. 7 shows the relationship between the liquid addition detection means 9 and the water addition presence / absence display means 17 of the electric water heater.

  In the present embodiment, the difference from the third embodiment is that the addition of water to the extent that it does not fall below 60 ° C. is detected by the liquid addition detecting means 9 during the non-use time 60 ° C. heat retention (STEP 90). By inputting a signal to the LCD, it is displayed that the addition of water to the extent that it does not fall below 60 ° C. is detected during the 60 ° C. heat retention in the non-use time zone (STEP 91).

  In the present embodiment, the LCD is used as the water addition presence / absence display means, but an LED, sound, or the like may be used.

  With the above configuration, by recognizing the presence or absence of water that does not fall below the low temperature holding temperature in the non-use time zone, it is predicted whether or not to heat up to boiling when moving to the next high temperature holding setting. Therefore, it is possible to avoid the overcurrent use by avoiding the combined use with other devices in advance.

(Embodiment 5)
FIG. 8 shows an electric water heater according to the fifth embodiment of the present invention. Since the main configuration is the same as that of the first embodiment, only different parts will be described.

  In the present embodiment, as shown in FIG. 8, the automatic heating control means indicates that the hot water in the container 2 is being heated by the heating means 5 when the temperature is controlled from 60 ° C. to 98 ° C. 10 or a heating display means 18 for displaying (LED in this embodiment) by inputting a signal from the additional undetected heating means 12 is provided.

  The operation and action of the electric water heater configured as described above will be described in more detail with reference to FIG.

  The present embodiment differs from the first embodiment in that the automatic heating control means 10 or the additional non-use time zone is shifted from the non-use time zone to the use time zone, that is, from 60 ° C. heat retention to 98 ° C. heat insulation control. In response to the input from the detection heating means 12, the fact that the heating means 5 is heating the hot water in the container 2 is displayed by inputting a signal to the LED to indicate that the hot water is being heated. In this embodiment, the LED is used, but an LCD, a voice, or the like may be used.

  Moreover, although it may display with the same LED when boiling is necessary or not, it may be displayed with separate LEDs.

  With the configuration as described above, it is possible to determine whether or not heating is being performed when shifting from the low temperature keeping temperature in the non-use time zone to the high temperature keeping setting, and an effect of preventing overcurrent use is obtained. In addition, the user can easily be informed of the driving situation.

  As described above, the electric water heater according to the present invention can shorten the water heater time as much as possible while avoiding the operation of the power breaker, can make the water heater more efficient and is easy to use, so the built-in type water heater It can also be applied to products that require energy-saving power, such as standby power consumption, such as many home appliances.

Block diagram of electric water heater in Embodiments 1 and 2 of the present invention Flowchart for explaining the control contents of the use detecting means, the heat retention control unit and the automatic heating control means in the electric water heater The flowchart explaining the control content of the heat retention control part and the avoidance control means in the electric water heater Block diagram of an electric water heater in Embodiment 3 of the present invention Flowchart for explaining the control contents of the heating means, mode change input means, temperature selection input means and post-input detection control means in the electric water heater Block diagram of electric water heater in Embodiment 4 of the present invention Flowchart for explaining control contents of liquid addition detection means and water addition presence / absence display means in the electric water heater Block diagram of electric water heater in Embodiment 5 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Temperature detection means 4 Discharge means 5 Heating means 6 Use detection means 7 Storage means 8 Thermal insulation control part 9 Liquid addition detection means 10 Automatic heating control means 11 Boiling setting input means 12 Additional non-detection heating means 13 Avoidance control means 14 Mode change input Means 15 Temperature selection input means 16 Control means after input detection 17 Water addition presence / absence display means 18 Heating display means

Claims (15)

It has at least two control temperatures of a first predetermined temperature and a second predetermined temperature lower than the first predetermined temperature, learns the usage pattern of the user, and performs two types of control based on the learned result A heat retention control unit that selects one of the temperatures and controls the energization of the heating unit based on the selected control temperature; and a liquid addition detection unit that detects whether or not a liquid is added at the second predetermined temperature during temperature control. When the addition of the liquid is detected based on the signal input from the liquid addition detecting means, the automatic heating is performed so that the temperature is controlled from the second predetermined temperature to the first predetermined temperature and the liquid is heated by the heating means. A control means and an avoidance control means for controlling the energization rate to the heating means by the input of the automatic heating control means, and after the start of heating by the automatic heating control means, heating is performed by continuous energization for a predetermined time. After that avoidance control hand Electric kettle for heating by controlling the duty factor by. 2. The electric water heater according to claim 1, wherein the predetermined time is set by changing according to the electric power watts of other electric devices. The electric water heater according to claim 1, wherein the predetermined time is determined based on an electrical characteristic of the power breaker. Based on a signal input from the liquid addition detecting means, when the liquid addition is not detected and the temperature control is switched from the second predetermined temperature to the first predetermined temperature, the liquid is heated from the first predetermined temperature by the heating means. The electric water heater according to any one of claims 1 to 3, further comprising additional undetected heating control means for heating to a higher third predetermined temperature. The electric water heater according to any one of claims 1 to 3, further comprising continuous energization display means for displaying that the energization is continuously performed for a predetermined time after the heating is started by the automatic heating control means. The electric water heater according to any one of claims 1 to 5, further comprising an avoidance control heating display means for displaying that heating for controlling the energization rate after a predetermined time has elapsed by the avoidance control means. There is a mode change input means for changing the heating control mode. During continuous heating of the liquid by the automatic heating control means, the control of continuous energization to the heating means is continued even when a signal is received from the mode change input means. The electric water heater according to any one of claims 1 to 6, wherein the electric water heater is continued until it becomes. A mode change input means for changing the heating control mode is provided, and the control of the energization rate to the heating means is continued even when a signal is received from the mode change input means while the liquid is heated by the avoidance control means. Item 7. An electric water heater according to any one of Items 1 to 6. A temperature selection input means for changing the first predetermined temperature is provided. During continuous heating of the liquid by the automatic heating control means, control of continuous energization to the heating means is performed for a predetermined time even when a signal is received from the temperature selection input means. The electric water heater according to any one of claims 1 to 8, wherein the electric water heater is continued until a lapse of time. A temperature selection input means for changing the first predetermined temperature is provided, and while the liquid is heated by the avoidance control means, the control of the power supply rate to the heating means is continued even when a signal is received from the temperature selection input means. The electric water heater according to any one of claims 1 to 8. The electricity according to any one of claims 1 to 10, further comprising a liquid addition non-display means for displaying that no liquid is added when no liquid addition is detected based on a signal input from the liquid addition detection means. Water heater. The electricity according to any one of claims 1 to 10, further comprising a liquid addition presence display means for displaying that a liquid has been added when the addition of a liquid is detected based on a signal input from the liquid addition detection means. Water heater. The electric water heater according to any one of claims 1 to 12, further comprising a heating display means for displaying that the liquid is being heated by the automatic heating control means. The electric water heater according to any one of claims 1 to 13, further comprising heating display means for displaying that the liquid is being heated by the additional undetected heating control means. The electric water heater according to any one of claims 1 to 13, further comprising a heating display means for displaying that the liquid is being heated by the automatic heating control means or the additional undetected heating control means.

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