JP4591200B2 - Electric hot water storage container - Google Patents

Description

  The present invention relates to an electric hot water storage container that heats and heats a content liquid and then retains the hot water to store it for use, and is used, for example, in an electric pot for home use.

  Electric pots are widely used in homes, workplaces, cafeterias, etc., and are highly dependent on homes. They are used during normal usage hours, that is, when hot water is poured out due to user lifestyle. In particular, leave the power on, except for replacement of the content liquid, and keep it warm, except during start-up during re-boiling operation during use and initial boiling due to replenishment of the content liquid. Is in a standard use state.

On the other hand, the warming temperature desired by the user varies depending on the presence of energy-saving thinking and the application, but due to the overwhelming relationship with the demand for high-temperature use, it is generally a high-temperature warming temperature such as 95 ° C that can be re-boiled quickly. Pre-set warming temperature is displayed to the user, such as a warming temperature of about 85 ° C that can be rapidly re-boiled, and a warming temperature of about 70 ° C that is not very inconvenient but takes a little time to re-boil, and has a high energy-saving effect. A rotation method can be selected and set by operating a heat retention selection key (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-245041

  By the way, while it is rare for each user to use a plurality of electric pots for each purpose in parallel, the purpose of use for each user is almost specified, but usually boiling water such as coffee is suitable. From applications to applications where hot water of about 60 degrees suitable for extracting milk and gyokuro for babies is suitable, there is a large gap in the temperature that the user wants, and for each application that is also conscious of energy saving Various hot water temperatures are desired, and the selection and setting method of the heat insulation temperature as described above cannot meet the various needs of users.

  Therefore, it is conceivable to increase the number of selections of the heat insulation temperature. However, in order to increase the number of heat insulation temperatures that can be displayed to the user, it is necessary to display this on the current narrow operation panel, especially on multiple types of displays on the narrower liquid crystal display. It is difficult to see and easy to select and set.

  An object of the present invention is to provide an electric hot water storage container that can respond to various needs for users by increasing the number of heat insulation temperatures selected without inconvenience of use based on the above points.

The electric hot water storage container of the present invention heats the content liquid in the hot water storage container to perform boiling, and in the electric hot water storage container to be used while keeping warm, the heat retention selection means for selecting and setting the heat retention temperature, the display means, By operating the heat insulation selection means, from the normal display state on the display means, the upper limit heat insulation temperature that can be selected, the lower heat insulation temperature including the heat insulation state, and the heat insulation temperature between them, related to the heat insulation temperature selection Switch to the display of the specified heat retention temperature, change the displayed heat retention temperature or state continuously or step by step, and select the display temperature at that time by no operation even after a predetermined time has passed. The main feature is that the display means is provided with a control means for performing heat insulation control as the heat insulation temperature and returning to the normal display.

In such a configuration, if there is an operation of the heat retention selection means to keep the temperature after boiling, the control means displays the normal display on the display unit, a specific heat retention temperature, for example, the currently set warmth temperature, or the current set temperature. The display is switched to the display of the warming temperature that has been changed by one selection operation from the warming temperature that has been selected, depending on the previous change, the selection start status from the currently set warming temperature, and depending on the subsequent change, Shows the user the selection continuation status from the initial selection that has changed, and keeps warming without any limitation due to display space, with continuous or step-by-step changes such as numeric display and character display at one place of the warming temperature or warming state. Since the temperatures are sequentially selected and there is no selection operation until a predetermined time elapses from the previous selection operation, the heat retention control is performed at the display heat retention temperature at that time. Here, “ predetermined time has elapsed” refers to the case where the temperature control is performed with the selected heat retention temperature displayed at the time when the predetermined time has elapsed without selection being performed after one or more selection operations as the set heat retention temperature.

There are at least one type of operation of the heat insulation selection means, that is, an up direction setting operation or a down direction setting operation. When the display temperature that can be selected by the up direction setting operation changes in the up direction and reaches the upper temperature keeping temperature, the lower temperature keeping temperature is reached. In a further configuration, the display temperature that can be selected is changed in the down direction depending on the down direction setting operation, and the change from the upper temperature holding temperature is repeated when the lower temperature holding temperature is reached.
If the heat insulation selection means has at least one of the up direction setting operation and the down direction setting operation, the user is notified whether the operation by the heat insulation selection means is the up direction setting operation or the down direction setting operation. In addition, it is easy to set a target according to the announced change rate in the up or down direction, and the change situation up to that point can be predicted.

After the display temperature has been changed by the operation of the heat insulation selection means, no operation other than the heat insulation temperature selection is accepted until there is a setting of the selected heat insulation temperature.
After the selection operation is activated and the display temperature changes once by the operation of the heat insulation selection means, the control is not stable until the selected heat insulation temperature is set and the selected condition is satisfied. Can be prevented.

  Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.

  According to the electric hot water storage container of the present invention, based on the operation of the heat retention selection means, the normal display of the display unit can be sequentially switched to display of continuous or stepwise changes in the heat retention temperature including the heat retention state. Since the heat insulation temperature can be selected, it is possible to meet the various needs of the user in a narrow display space, and since the selectable heat insulation temperature is not displayed at the same time, it is difficult to see the display including other displays and operations. And various operations are not confused.

  Hereinafter, an electric hot water storage container according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7 to provide an understanding of the present invention. In addition, the following description and illustration show the specific example of this invention, and do not limit the technical scope of this invention.

  The electric hot water storage container of the present embodiment is an example of an electric pot for home use. As shown in FIG. 1, the content liquid in the hot water storage container 1 is heated by a heater 2 to perform boiling, While using it. Specifically, it is desirable that the hot water storage container 1 has a heat insulating structure from the viewpoint of heat insulation, and a stainless steel vacuum double container is employed in the present embodiment. The heater 2 is applied to the single bottom portion 1c where the vacuum space 4 of the hot water storage container 1 is not formed so that the content liquid can be efficiently heated. Under the control of energization by the control circuit 5 as shown in FIG. The water is heated and kept warm. The content liquid can be used by pouring out the hot water storage container 1. However, for convenience of use, the electric pump 6 or the manual pump 7 can be used for pouring through the pouring path 8. However, a so-called electromagnetic induction heating method in which the content liquid is heated by causing the hot water storage container 1 to generate heat by electromagnetic induction may be employed. Further, the heater 2 uses a heater 2a for boiling water and a heater 2b for heat insulation, which have different heating capacities, and the control circuit 5 starts initial boiling and reboiling early with the water heater 2a having a high heating capacity, Using the heater 2b having a low heating capacity, the temperature is kept at the set temperature by simple control that repeatedly turns on when the temperature falls below the set temperature and turns off when the temperature exceeds the set temperature. However, the present invention is not limited to this, and various controls such as changing the duty ratio, changing the energization capacity, and simultaneously energizing the water heater 2a and the warming heater 2b can be adopted.

  More specifically, the hot water storage container 1 is accommodated in the outer case 12 to form the container 3, and the heater 2, the electric pump 6, and the pouring path 8 are accommodated between the hot water storage container and the outer case 12. Yes. The outer case 12 is configured such that a synthetic resin bottom member 12a and a synthetic resin shoulder member 12b are connected by a metal body 12c made of a steel plate, a stainless steel plate or the like. A fitting 13 is attached from below to the opening edge 12b1 of the bottom of the shoulder member 12b fitted to the upper end of the body 12c by welding to the shoulder around the mouth 1a of the hot water storage container 1 and screwed. 14 is screwed from above and connected. The bottom member 12a applied to the lower end of the body portion 12c from below is attached to the bottom portion of the hot water storage container 1 by connecting with a connection fitting (not shown). A synthetic resin cover ring 15 is provided covering the opening 1b of the hot water storage container 1 from above the opening edge 12b1 at the bottom of the shoulder member 12b, and screwed from above with a screw (not shown) of the opening edge 12b1 of the shoulder member 12b. It is. Seal packings 16 and 17 are sandwiched and sealed between the cover ring 15 and the shoulder member 12b and the mouth portion 1a of the hot water storage container 1, respectively. A bottom cover 18 made of synthetic resin is fitted into the inspection opening 12a1 of the bottom member 12a so as to be detachable using a plurality of claws 18a provided on the outer periphery, and is screwed with a single screw (not shown), A rotating seat 19 is fitted to the bottom lid 18 so as to be rotatable. The container body 3 is placed on a stationary surface by the rotating seat body 19, and in the stationary state, the container body 3 is reciprocally rotated within a range substantially close to 360 ° to change the direction.

  The pouring path 8 extends laterally from the electric pump 6 connected from below through the portion where the heater 2 is cut out to the single bottom portion 1c of the hot water storage container 1 to the lower part between the body portions of the hot water storage container 1 and the outer case 12. The body part 3 is formed with a shoulder member 12b between the torso and rises to the base of the projecting part 20 to the front end of the upper body 3 and passes through the water stop part 21 at the time of falling or tilting forward located in the projecting part 20. It has a spout 8a that reaches the tip of the overhang 20 and bends downward and protrudes downward. The overhanging portion 20 where the water stop portion 21 and the spout 8a are located is provided in front of the upper end portion of the trunk portion 12c of the outer case 12, and the overhang portion 20, the shoulder member 12b, and the trunk portion 12c of the outer case 12 The lower surface of the overhanging portion 20 is formed from below by a pipe cover 22 that is sandwiched between them.

  Since the rising portion of the pouring channel 8 maintains the same liquid level as in the hot water storage container 1, a liquid amount display portion 8d formed of a transparent tube is provided, and a liquid amount display window (not shown) provided in the body portion 12c of the outer case 12 is provided. Appearance makes it possible to display the liquid volume externally. Although not shown, the liquid amount display window of the outer case 12 is provided with a scale indicating the remaining amount corresponding to the change in the liquid level indicated by the liquid amount display portion 8d. A flow rate sensor 25 including a screw 25a and a rotation sensor 25b for detecting the rotation of the screw 25a is provided between the liquid amount display portion 8d and the water stop portion 21 of the dispensing channel 8, and the rotation of the screw 25a by the flow rate sensor 25 is provided. By detecting the presence / absence of the liquid and the number of revolutions, it is possible to detect the presence / absence of the content liquid, the flow rate of the content liquid at that time, and the like. A filter 27 made of a metal mesh is attached from above to the outlet 26 of the content liquid to which the electric pump 6 of the hot water storage container 1 is connected so that foreign matter is not poured out together with the content liquid.

  A hollow lid 31 made of synthetic resin is provided at the upper end of the vessel body 3, and a hinge pin 33 at the rear portion of the lid body 31 is detachably attached to a bearing portion 32 provided at the rear portion of the shoulder member 12b. 33 is supported so that it can be opened and closed. The lid 31 in the closed state is fitted with a supply / discharge opening 1d formed by the shoulder member 12b of the container body 3 from above to close the opening 1d, and is made of a metal provided on the lower surface of the cover 31. The inner lid 34 fits into the opening 11d of the hot water storage container 1 continuing to the opening 1d through the cover ring 15, and the seal packing 35 mounted on the outer periphery of the inner lid 34 is pressed against the upper edge 11d1 of the opening 11d of the hot water storage container 1 Thus, the hot water storage container 1 is sealed. The bearing portion 32 has a forward opening portion 32a to which the hinge pin 33 can be attached and detached at a half-open position where the lid body 31 is disengaged from the opening 11d of the hot water storage container 1 and the opening 1d of the vessel body 3. The lid 31 can be attached to and detached from the container 3 by attaching and detaching. The opening portion 32a of the bearing portion 32 is always closed by a stopper 36 having a closing behavior by the bias of the spring 36b, and is not opened without a downward movement operation by the operation portion 36a of the stopper 36. 31 inadvertent removal and falling off can be eliminated. The stopper 36 does not interfere with the reception of the hinge pin 33 by retraction against the spring 36b, and the lid 31 can be mounted without requiring the operation of the stopper 36. A steam passage 37 for releasing the steam in the hot water storage container 1 to the outside through the lid body 31 is provided with a water stop valve 37c for preventing the content liquid from flowing out through the steam passage 37 when the container body 3 falls, and a water stop valve 37c. If the content liquid still flows out, the accumulating portion 37d is provided to delay the outflow to the outside by accumulating it or detouring it.

  The lid 31 includes a steam passage 37 that discharges steam generated in the hot water storage container 1 to the outside, and a bellows type manual pump 7. The pressure plate 41 is exposed on the upper surface of the lid 31. Each time a pressing operation is performed against the restoring spring 42, air is sent into the hot water storage container 1 to pressurize the content liquid so that the liquid can be pushed out and poured out into the spout 8 a through the spout 8. The steam passage 37 communicates between the inlet 37a of the inner lid 34 and the outlet 37b on the upper surface of the lid 31 and discharges the steam generated in the hot water storage container 1 to the outside. The manual pump 7 has a switching valve 38 for switching the steam passage 37 from the manual pump 7 to the air supply passage to the hot water storage container 1 in conjunction with the pressing operation by the bias of the spring 39 and returning to the steam passage 37 by restoration. is doing.

  When the lid body 31 is closed at the front part of the lid body 31, the lid body 31 is locked in a closed state by being elastically engaged with a locking portion 411 provided in the opening 1 d of the container body 3 by the bias of the spring 412. A lock member 43 is provided, and when the lock member 43 is moved backward against the spring 412 by operating the operation lever 44 pivotally supported by the shaft 44a at the front portion of the cover body 31, the lock of the cover body 31 to the closed state is released. can do. For example, the operation lever 44 releases the lock when the front end 44b is pushed down with a thumb, and when the tail end 44c that is raised at that time is lifted with an index finger or the like, the front part of the unlocked lid 31 is lifted, so that the lid 31 is moved back. It can be opened to the final position that is tilted and stable.

  An operation panel 52 as shown in FIG. 3A is provided on the upper surface of the overhanging portion 20 and a seal name plate 51 made of a resin sheet as shown in FIG. On the operation panel 52, for example, as shown in the figure, the hot water supply key 53 for driving the electric pump 6 and the hot water supply key 53 are disabled so that the hot water supply, that is, the pouring cannot be performed, and the hot water supply is released. A lock / release key 54, a heat setting selection key 55 consisting of an up setting operation key 55a for selecting the temperature to be kept after boiling of the content liquid, and a down setting operation key 55b, boiling the content liquid again during the heat retention, and removing the chalk Re-boiling / calf removal key 56, heater 2 is turned off, so-called thermos warming using the heat insulation function of hot water storage container 1 is selected, and the time to switch to warming after the initial boiling is reserved with the required time from the current time In addition to the thermos heat retention / timer key 57 for setting and the cooking timer key 58 for cooking, the set heat retention temperature, the current temperature, etc. are displayed with numbers and characters. Crystal display unit 59, lightweight cup key 60 for setting the amount of liquid to be dispensed according to the application, hot water lock lamp 54a for displaying hot water lock / unlock by turning on / off, boiling lamp 61, heat retention lamp 62, thermos heat retention A lamp 63 and the like are provided. For these operations and display, as shown in FIG. 1, the operation box 52 has an upper wall of the overhanging portion 20 of the shoulder member 12b that is recessed and formed integrally, and the upper opening is sealed by the seal nameplate 51. An operation board 64 is installed in 163. The operation board 64 is equipped with electrical elements such as switches that respond to the operation on the operation panel 52 and a display tool for controlling the display. The inside of the body 3, that is, the bottom of the hot water storage container 1 and the exterior case are mounted. The operation of the electric pot is controlled by cooperating with a power source / control board 65 installed between the bottom portion of 12 and the control circuit 5 such as a microcomputer. As shown in FIG. 2, the operation panel 52 is bidirectionally connected to the control circuit 5, the flow rate sensor 25 and the temperature sensor 101 are connected to the input unit, and the heaters 2 and drivers 71 and 72 of the pump 6 are connected to the output unit. ing.

  As shown in FIG. 3 (a), the liquid crystal display unit 59 displays a thermos bottle heat-retaining, power-saving, chill removal, metered hot water supply, combined use of temperature and remaining time, etc. in conjunction with various setting operations. ing. Further, the up setting operation key 55a and the down setting operation key 55b of the heat retention selection key 55 are set to the timer values set by the key operations for selecting numerical values such as various timer settings and measuring cup settings. It is also used to increase and decrease the measurement value and to decrease the measurement value.

  Here, an example of the control related to the selection of the heat insulation temperature by the control circuit 5 will be described based on the flowchart shown in FIG. 5. When the power is turned on, the control start is determined in step ST1 in FIG. In addition to displaying that the boiling operation is performed by turning on the boiling lamp 61 and performing boiling water as shown in FIG. 4, the liquid crystal display unit 59 as a display unit displays characters of temperature 90, numerical display, and setting characters. The display indicates to the user that the heat retention temperature is initially set to 90 ° C. Next, in step ST3, a timer for seeing a predetermined condition for the heat insulation selection, for example, the passage of a predetermined time such as 5 seconds, is started. In steps ST4 and 5, the operation of the heat insulation selection key 55 as the heat insulation selection means is performed before the timer is finished. Otherwise, the process proceeds to step ST6, and it is assumed that the heat insulation selection is confirmed, and the set temperature 90 ° C. displayed in FIG. 4 (a) is not changed and set to the character and numerical value display of the temperature 25 in FIG. 4 (b). The display is switched to the normal display for displaying the hot water temperature at that time, for example, 25 ° C. In this state, various controls are performed in accordance with the progress of the setting mode and control such as boiling water and heat retention, and when the boiling is finished and switched to the heat retention control, the content liquid becomes stable at the set temperature 90 ° C. . As shown in FIG. 3B, the normal display at this time is a normal display indicating that the current hot water temperature is 90.degree.

  In step ST3 at the start, or in step ST8 while repeating various controls, during normal display including during boiling and during warming as shown in FIG. 3B, etc., as shown in FIG. When the operation is performed, the process proceeds to step ST9, and the normal display on the liquid crystal display unit 59 is switched to the setting confirmation display of the heat insulation temperature as shown in FIG. In this display, the user is notified and confirmed that the set temperature of the heat retention is 90 ° C. by displaying the setting character, the character of temperature 90, and the numerical value display. Next, in step ST10, a timer for checking the confirmation condition for the heat insulation selection is started, and in step ST11-13, each time the heat insulation selection key 55 is operated until the timer is finished, the timer is restarted and the temperature 90 is restarted. In addition to changing the numerical display of the character and numerical display in a predetermined direction to 95 or the like in a predetermined direction, the setting character display blinks to confirm that the heat retention temperature is being selected. When the timer is terminated without the operation of the heat insulation selection key 55 by repeatedly informing the user and prompting the user to select the heat insulation temperature, the heat insulation temperature finally selected and displayed in step ST14 is determined and set as the selected heat insulation temperature. As shown in FIG. 3 (h), the liquid crystal display unit 59 is switched to the normal display, that is, the hot water temperature display state in FIG. 3 (b) is restored.

  However, the final conditions for selecting the heat insulation temperature include the time immediately after the selection operation and the time when the predetermined time has elapsed, and at the time immediately selected, the set heat insulation temperature is set while maintaining the heat insulation temperature as the set heat insulation temperature. It also includes cases where it can be updated. Further, the selected heat retention temperature may be determined by operating the hot water supply lock / release key 54 described above and set as the set heat retention temperature reflected in the heat retention control.

  The heat insulation temperature that can be selected by the heat insulation selection key 55 is set to the lower temperature maintenance temperature of about 95 ° C. to 98 ° C. that can be used for re-boiling or used for pouring before hot water sencha. It is suitable for baby milk melting, gyokuro extraction, etc., and it is possible to set various warming temperatures that change continuously or stepwise between them, with the minimum warming temperature being around 60 ° C, which can suppress the propagation of germs. Desirably, it is practical to change the temperature step by step by about 5 ° C from the viewpoint that the temperature setting that changes continuously by 1 ° C is not effective in increasing the number of set temperatures. It can be said that it is preferable.

  In addition, in order to select the heat retention temperature with continuous or stepwise change from the lower limit heat retention temperature and the upper limit heat retention temperature as described above and to set the final selection state, the change is made in a change order in one direction of increase / decrease. Therefore, selection and setting can be achieved smoothly without confusion. It is also convenient if one of the change procedures can be selected depending on whether the selected heat retention temperature to be selected with respect to the current set temperature is the up side or the down side. Therefore, in this embodiment, as shown in FIG. 3, the heat retention selection key 55 is a combination of the up setting operation key 55a and the down setting operation key 55b, and the change direction of the selected heat retention temperature is determined to be the up direction or the down direction. The temperature can be selected and changed in the selected direction. However, since the selection may not be completed when the temperature limit in the selected change direction is reached, it is preferable to repeat the rotation of the temperature change until the setting is completed, and the repetition is selected. While maintaining the direction of change is preferable in order to avoid confusion, the present invention is not limited to this.

  Furthermore, the heat insulation temperature that can be selected may include the thermos heat insulation state in which the temperature is lowered to a region below the lower limit heat insulation temperature, or less than the lower heat insulation temperature while being heated by the heater 2 instead of or in addition to the thermos heat insulation. It may include an energy-saving mode that lowers the temperature. In these cases, the selection cannot be indicated by the heat retention temperature, but may be performed by character display as shown in FIG. 3 (f), and the rotation order is a heat retention that is lower than the lower limit temperature 60 ° C. of the selected heat retention temperature. Therefore, if the permutation is lower than the lower limit temperature, it is preferable as the selection order of the heat retention, and the thermos warming may be lower than the quasi thermos warming.

  As described above, in this embodiment, when the heat selection key 55 is operated to keep the temperature after boiling, the control circuit 5 displays the normal display that is a very small part of the liquid crystal display unit 59. As a specific heat retention temperature related to temperature selection, the display is switched to the display of the currently set heat insulation temperature, which is the reference for the heat insulation temperature selection, and the start status of the selection from the currently set heat insulation temperature is shown to the user, and the liquid crystal With a continuous or stepwise change such as numerical display or character display at one place on the display unit 59, many heat retention temperatures can be selected in sequence without limitation by the display space, and the final condition is determined from the previous selection operation. Since there is no selection operation until it is satisfied, the heat retention control set to the finally selected heat retention temperature is performed. The switching from the normal display by operating the heat retention selection key 55 is the heat retention temperature changed by one selection operation from the currently set heat retention temperature, and the selection continuation status from the initial selection changed by one selection operation. It is also possible to select or set the subsequent heat insulation temperature while notifying the user. As a result, based on the operation of the heat insulation selection key 55, the normal display on a limited part of the liquid crystal display unit 59 can be switched to the display of continuous or stepwise change of the heat insulation temperature including the heat insulation state. Since various warming temperatures and warming states can be selected, it is possible to meet a variety of user needs in a narrow display space, and the selectable warming temperatures and warming states are not displayed at the same time. The display is difficult to see, and the selection and various operations are not confused.

  Moreover, as shown above, the display space for the hot water display at that time can be switched during the selection and setting of the heat insulation temperature as described above, and there is one display section for selecting and setting the hot water temperature and the heat insulation temperature. In particular, a simple 7-segment display is shared by the numerical display.

  In the example shown in FIG. 6, instead of the previous heat retention selection key 55, a heat retention selection dial 155 that is rotated is provided around the hot water supply key 53, and the operation for rotating the index 155 a to the high temperature side is the up setting operation key. The control circuit 5 handles the up setting operation corresponding to the case of 55a, and the control circuit 5 handles the down setting operation corresponding to the case of the rotation to the low temperature side using the down setting operation key 55b. In this case, even if two keys such as the up setting operation key 55a and the down setting operation key 55b are not provided, the display processing can be performed by displaying the high temperature side and the low temperature side by changing the thickness of characters and arrows, both of them. There is. However, it is necessary to detect the rotation direction and the rotation amount of the heat retention selection dial 155 by a sliding resistance, an encoder, or the like. The up setting operation key 55a and the down setting operation key 55b are necessary for the up / down operation of other setting values, but the operation member is reduced by one for selecting the heat retention temperature. Of course, it is possible to use either the up setting operation key 55a or the down setting operation key 55b in selecting the heat retention temperature.

  In the example shown in FIG. 7, since the selection method of a large number of heat retention temperatures by switching and displaying the set temperature and the selected heat retention temperature as described above is achieved in a very space-saving manner, A display unit 201 using 7 segments and a display unit 202 using 7 segments displaying hot water temperature and remaining time are provided in the liquid crystal display unit 59, and the set warming temperature and warming state can be determined according to the hot water temperature. And the remaining time can be displayed at all times, making it easy to check each, while easily selecting and setting the heat insulation temperature as a related display change operation in the display unit 201, the selection, The setting operation and control can be performed in the same manner as in the previous example. Although the display unit 201 is displayed in a smaller space than the display unit 202, it is easier to operate if the display unit 201 is larger than the display unit 202 when a liquid crystal pixel display is used to select and set the heat retention temperature.

  Further, as a control, after the display temperature is changed by operating the heat retention selection key 55, operations other than the heat retention temperature selection are not accepted until the selected heat retention temperature is set. As a result, after the selection operation is effectively performed by the operation of the heat insulation selection key 55 and the display temperature is once changed, the control is not stabilized until the selected heat insulation temperature is set and the selected heat insulation temperature is set. It is possible to prevent interruption and control failure.

  In addition, after the display temperature is changed by operating the heat retention selection key 55, the heating can be stopped until the selected heat retention temperature is set. If the temperature is changed, the newly set heat retention temperature is unknown, so that the heating is temporarily stopped to avoid waste and inconvenience of excessive heating. Instead, if there is a change in the display temperature due to the up direction setting operation, heating is continued, and after a change in the display temperature due to the down direction setting operation, the heating is stopped until the selected heat retention temperature is set. It can also be controlled. According to this, if there is a constant change in temperature due to the up operation direction setting operation, the heat insulation temperature will be increased thereafter, so that it will not be disadvantageous for raising the hot water temperature by continuing heating, and setting it down After the display temperature is changed due to the operation, the heat insulation temperature is reduced depending on the setting of the selected heat insulation temperature, avoiding waste and disadvantage when heating is unnecessary corresponding to the subsequent decrease in temperature. It will be possible to respond by heating.

  Moreover, the release function of the hot water supply lock / release key 54 corresponds only to the hot water supply lock, and if a release function for the operation of selecting heat insulation is necessary, a dedicated key or a dual-purpose key can be provided to cope with it. May be.

  The present invention can be applied to an electric pot, and the user can freely set the heat retention temperature.

It is sectional drawing which shows one example of the electric pot which concerns on embodiment of this invention. It is a block connection diagram of the control circuit of the electric pot of FIG. The top view which shows the operation panel of the electric pot of FIG. 1 is shown to (a), and it is explanatory drawing which shows the procedure of selection operation of the heat retention temperature in an operation panel in order of (b)-(h). It is explanatory drawing which shows the example of a switching control of the display state of the liquid crystal display part at the time of power-on of the electric pot of FIG. It is a flowchart which shows the control example regarding selection and setting of the heat retention temperature of the electric pot of FIG. It is a front view of the operation panel which shows the modification of the heat retention selection operation part of the electric pot of FIG. It is a front view of the operation panel which shows another example of the display part of the hot water temperature of the electric pot of FIG. 1, and the display part which performs selection operation of the display of setting heat retention temperature, and heat retention temperature.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage container 2 Heater 3 Body 4 Vacuum space 5 Control circuit 6, 7 Pump 8 Outlet 8a Outlet 12 Outer case 25 Flow rate sensor 52 Operation panel 55 Insulation selection key 155 Insulation selection dial 55a Up setting operation key 55b Down setting operation Key 58 LCD unit 201, 202 Display unit

Claims (4)

In an electric hot water storage container that heats the liquid in the hot water storage container and performs boiling,
By selecting the warming selection means for selecting and setting the warming temperature, the display means, and the warming selection means, the upper limit warming temperature that can be selected from the normal display state on the display means, the lower warming temperature including the warming state, Switch to the display of the specific heat retention temperature related to the heat insulation temperature selection among the heat insulation temperatures between them, change the displayed heat insulation temperature or the heat insulation state continuously or step by step, and the predetermined time has elapsed Even if there is no operation, the electric hot water storage container is characterized by comprising control means for controlling the temperature of the display temperature at that time as the selected temperature, and returning the display means to normal display. In an electric hot water storage container that heats the liquid in the hot water storage container and performs boiling,
By selecting the warming selection means for selecting and setting the warming temperature, the display means, and the warming selection means, the upper limit warming temperature that can be selected from the normal display state on the display means, the lower warming temperature including the warming state, Switch to the display of the specific heat retention temperature related to the heat insulation temperature selection among the heat insulation temperatures between them, change the displayed heat insulation temperature or the heat insulation state continuously or step by step, and the predetermined time has elapsed Even if there is no operation, the display means is provided with a control means for performing the heat insulation control with the display temperature at that time as the selected heat insulation temperature and returning to the normal display,
There are at least one type of operation of the heat insulation selection means, that is, an up direction setting operation or a down direction setting operation. When the display temperature that can be selected by the up direction setting operation changes in the up direction and reaches the upper temperature keeping temperature, the lower temperature keeping temperature is reached. The hot water storage is characterized in that the display temperature that can be selected depending on the down direction setting operation changes in the down direction and changes from the upper temperature holding temperature when the lower temperature holding temperature is reached. container. In an electric hot water storage container that heats the liquid in the hot water storage container and performs boiling,
By selecting the warming selection means for selecting and setting the warming temperature, the display means, and the warming selection means, the upper limit warming temperature that can be selected from the normal display state on the display means, the lower warming temperature including the warming state, Of the insulation temperatures between them, the specific insulation temperature related to the insulation temperature selection
Switch to display, change the displayed heat insulation temperature or state continuously or step by step, and keep the display temperature at that point as the selected heat retention temperature when there is no operation after a predetermined time. And the display means has a control means for returning to the normal display.
The electric hot water storage container characterized in that the specific heat retention temperature is a current heat retention temperature or a heat retention temperature obtained by changing the current heat retention temperature by one selection operation . In an electric hot water storage container that heats the liquid in the hot water storage container and performs boiling,
By selecting the warming selection means for selecting and setting the warming temperature, the display means, and the warming selection means, the upper limit warming temperature that can be selected from the normal display state on the display means, the lower warming temperature including the warming state, Switch to the display of the specific heat retention temperature related to the heat insulation temperature selection among the heat insulation temperatures between them, change the displayed heat insulation temperature or the heat insulation state continuously or step by step, and the predetermined time has elapsed Even if there is no operation, the display means is provided with a control means for performing the heat insulation control with the display temperature at that time as the selected heat insulation temperature and returning to the normal display,
An electric hot water storage container characterized in that, after the display temperature is changed by the operation of the heat insulation selection means, the operation other than the heat insulation temperature selection is not accepted until the selected heat insulation temperature is set .

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