JP3543782B2 - Electric hot water storage container - Google Patents

Description

[0002]
TECHNICAL FIELD OF THE INVENTION
[0003]
The present invention relates to an electric hot water storage container used as an electric pot or the like, and more particularly, to a hot water supply passage provided with flow rate measuring means for measuring a hot water supply flow rate, and displaying a flow rate measured by the flow rate measuring means as a hot water supply amount. The present invention relates to an electric hot water storage container indicated in FIG.
[Prior art]
[0004]
Description of the Related ArtElectric water storage containers including a water heater, a heating means for heating the water container, and an electric pump for supplying hot water in the water container through a hot water supply passage have been well known in the related art. In the electric hot water storage container having such a structure, by providing a flow rate sensor for measuring the flow rate of hot water in the hot water supply passage, the flow rate of hot water is displayed on the liquid crystal display device, or a preset hot water supply amount is measured by the flow rate sensor. A system in which a fixed amount of hot water is supplied has been well known.
[0005]
In addition, an electric hot water container is provided with a weight sensor, the weight sensor measures a decrease in the amount of hot water stored in the inner container as a hot water supply amount, and the hot water supply amount is displayed on a display unit. I have.
[Problems to be solved by the invention]
[0006]
However, in the type in which the amount of hot water is measured by the flow rate sensor, there is a fact that the time until hot water reaches the flow rate sensor provided in the middle of the hot water supply passage varies depending on the internal capacity. For example, as shown in FIG. 8, the distance between the water level L ₁ when the amount of hot water in the inner container is large and the flow sensor 25 is D ₁ , and the water level L ₂ and the flow sensor 25 when the amount of hot water is low is If the distance was set to D _2, since the D ₁ << D _2, after the start of driving of the electric pump, hot water flow sensor 25 is of so that the difference occurs in the time to reach.
[0007]
Further, even after the hot water reaches the flow sensor 25, the hot water is not discharged from the outlet of the hot water supply passage 5 until the hot water is filled in the passage 5 'on the downstream side of the flow sensor 25. Not done.
[0008]
Further, the signal output from the flow rate sensor 25 becomes unstable until the hot water supply via the hot water supply passage 5 becomes steady.
[0009]
Unless the above factors are considered, there is a problem that the flow rate measured by the flow rate sensor 25 cannot be accurately displayed as the hot water supply amount.
[0010]
In the case of displaying the amount of hot water using the weight sensor, there is a problem that it is difficult to accurately measure the amount of hot water when a small amount of hot water is supplied unless the measurement accuracy of the weight sensor is increased.
[0011]
The present invention has been made in view of the above points, and an object of the present invention is to enable accurate display of a hot water supply amount at an early stage of hot water supply.
[Means for Solving the Problems]
[0012]
In the invention of claim 1, as means for solving the above-mentioned problems, an inner vessel for water heater, a heating means for heating the inner vessel, and an electric pump for supplying hot water in the inner vessel via a hot water supply passage. And a display unit for displaying a hot water supply amount, wherein the straight pipe portion in the hot water supply passage is provided with a flow rate measuring means for measuring a hot water supply flow rate. After the first signal output from the measuring means, the time for obtaining the pump discharge amount corresponding to the capacity of the passage on the downstream side of the flow rate measuring means has elapsed since the first signal output. In the meantime, the hot water supply amount display on the display unit is configured to be a display indicating “no hot water supply amount”.
[0013]
With the above-described configuration, in the early stage of hot water supply (that is, at the start of driving of the electric pump), there is a difference depending on the amount of hot water until the first signal output from the flow rate measuring means is obtained. This difference can be nullified by setting the amount display to a display representing "no hot water supply". In addition, during a period from the time when the first signal output from the flow rate measuring unit is output to the time when the pump discharge amount corresponding to the capacity of the downstream passage of the flow rate measuring unit elapses, the display unit is used. By making the hot water supply amount display a display indicating “no hot water supply amount”, the hot water supply amount display indicates “no hot water supply amount” while hot water is not actually discharged through the hot water supply passage. As a result, a hot water supply amount display that is not affected by errors in the hot water supply amount at the beginning of hot water supply can be performed.
[0014]
In the invention according to claim 2, as means for solving the above problems, an inner vessel for water heater, a heating means for heating the inner vessel, and an electric pump for supplying hot water in the inner vessel through a hot water supply passage. And a display unit for displaying a hot water supply amount, wherein the hot water supply passage is provided with a flow rate measuring means for measuring a hot water supply flow rate. After the first signal output and before the first set time elapses from the time when the first signal output is output, the hot water supply amount display on the display unit is changed to “hot water supply”. No amount is displayed, and after the first set time elapses and before the second set time set in advance, the actual hot water supply flow rate is reduced. Unit time preset regardless of It constitutes a hot water supply amount calculated based on the set flow rate or to display on the display unit.
[0015]
With the above-described configuration, in the early stage of hot water supply (that is, at the start of driving of the electric pump), there is a difference depending on the amount of hot water until the first signal output from the flow rate measuring means is obtained. This difference can be nullified by setting the amount display to a display representing "no hot water supply". In the period from when the first signal is output from the flow rate measuring means to when the first preset time elapses, the display of the hot water supply amount on the display unit indicates “no hot water supply”. As a result, while the hot water is not actually being poured out through the hot water supply passage, the hot water supply amount display will be a display indicating "no hot water supply amount", and the error of the hot water supply amount at the beginning of the hot water supply Can be displayed without being affected by the temperature. Further, even after the first set time has elapsed and hot water supply has actually started, there is a period during which the output signal from the flow rate measuring means is not stable. Instead, the hot water supply amount calculated based on the preset flow rate per unit time is displayed, and the hot water supply amount display that is not affected by the instability of the output signal from the flow rate measuring means can be performed.
[0016]
As in the third aspect of the present invention, in the electric hot water storage container according to the second aspect, the first set time is a time at which a pump discharge amount corresponding to a capacity of a passage on a downstream side of the flow rate measuring means is obtained. In this case, when the first set time has elapsed, the passage downstream of the flow rate measuring means is filled with hot water, so that the hot water starts to be poured out through the hot water supply passage, and the actual hot water supply start timing is determined. be able to.
[0017]
As in the fourth aspect of the present invention, in the electric hot water storage container according to any one of the second to third aspects, after the second set time has elapsed, the electric hot water storage container is based on the flow rate measured by the flow rate measuring means. When the display unit is configured to display the hot water supply amount, after the second set time at which the output signal of the flow measurement unit is stabilized, the hot water supply amount display is performed based on the flow rate measured by the flow measurement unit. As a result, an accurate hot water supply amount display can be obtained.
[0018]
In the invention according to claim 5, as means for solving the above-mentioned problems, an inner vessel for water heater, a heating means for heating the inner vessel, and an electric pump for supplying hot water in the inner vessel via a hot water supply passage. And a display unit for displaying a hot water supply amount, wherein the hot water supply passage is provided with a flow rate measuring means for measuring a hot water supply flow rate. After the first signal output and before the first set time elapses from the time when the first signal output is output, the hot water supply amount display on the display unit is changed to “hot water supply”. While it is configured so as to indicate that there is no amount, fixed water supply setting means for setting the amount of hot water supplied by the electric pump to a predetermined amount, and hot water supply only by the set amount of hot water set by the fixed water supply setting means. The electric port While attached to the quantitative hot water supply control means for controlling the driving of the flop, the lower limit of configured and the setting hot water supply amount to provide a lower limit value of the set hot water supply amount by the quantitative hot water supply setting means, from the flow measuring means It is configured so that it is equal to or greater than a predetermined value regardless of the signal output.
[0019]
With the above-described configuration, in the early stage of hot water supply (that is, at the start of driving of the electric pump), there is a difference depending on the amount of hot water until the first signal output from the flow rate measuring means is obtained. This difference can be nullified by setting the amount display to a display representing "no hot water supply". In the period from when the first signal is output from the flow rate measuring means to when the first preset time elapses, the display of the hot water supply amount on the display unit indicates “no hot water supply”. As a result, while the hot water is not actually being poured out through the hot water supply passage, the hot water supply amount display will be a display indicating "no hot water supply amount", and the error of the hot water supply amount at the beginning of the hot water supply Can be displayed without being affected by the temperature. In addition, by providing the lower limit value to the set hot water supply amount when performing the fixed hot water supply, the fixed hot water supply can be performed in a region where a stable hot water supply amount is obtained, and the flow rate from the flow rate measuring unit which is a hot water supply amount having a large error can be obtained. A value larger than a predetermined value irrespective of the signal output can be set as the lower limit of the set hot water supply amount, and a fixed amount of hot water supply not affected by an error can be obtained.
[0020]
As in the invention of claim 6, in the electric hot water storage container according to claim 5, the first set time is a time at which a pump discharge amount corresponding to a capacity of a passage on a downstream side of the flow rate measuring means is obtained. In this case, when the first set time has elapsed, the passage downstream of the flow rate measuring means is filled with hot water, so that the hot water starts to be poured out through the hot water supply passage, and the actual hot water supply start timing is determined. be able to.
BEST MODE FOR CARRYING OUT THE INVENTION
[0021]
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0022]
As shown in FIGS. 1 and 2, this electric hot water storage container has a container body 1 provided with an inner container 3 for storing hot water, a lid 2 for opening and closing the container body 1, and a heating device for heating the inner container 3. It comprises an electric heater 4 as a means, a hot water supply passage 5 for supplying the hot water in the inner container 3 to the outside, and an electric pump 6 for sending out the hot water through the hot water supply passage 5.
[0023]
The container body 1 includes an outer case 7 made of a synthetic resin that forms an outer surface, the inner container 3 that forms an inner peripheral surface, and a ring made of a synthetic resin that connects the outer case 7 and the inner container 3. It comprises a shoulder member 8 and a bottom plate 9 made of synthetic resin, which constitutes a bottom surface.
[0024]
The inner container 3 is formed of a vacuum double structure having a vacuum space between a stainless steel bottomed cylindrical inner cylinder 10 and a stainless steel outer cylinder 11, and the bottom has an outer peripheral portion. Except for this, a single plate portion 3a constituted by only the bottom portion of the inner cylinder 10 is formed. The electric heater 4 (for example, a mica heater formed by holding a heating element on a mica plate) is attached to the lower surface of the single plate portion 3a. At the upper end of the inner container 3, a small-diameter water supply port 3b formed by drawing the upper end of the inner cylinder 10 is formed. Reference numeral 12 denotes a temperature sensor that functions as hot water temperature detecting means for detecting the temperature of the inner container 3 (in other words, hot water temperature), and 13 denotes a full water level display unit that displays the full water level of the inner container 3.
[0025]
The lid 2 includes an upper plate 14 made of a synthetic resin and a lower plate 15 made of a synthetic resin having an outer peripheral edge joined to the upper plate 14, and is provided at a rear portion of the shoulder member 8. It is supported on a hinge receiver 16 via a hinge pin 17 so as to be openable and closable and detachable.
[0026]
The lid 2 is provided with an air pump 18 that is driven by manual operation so that hot water can be supplied through the hot water supply passage 5 even when the power is not connected. The air pump 18 is of a bellows type disposed in a cylindrical concave portion 19 formed substantially at the center of the lid 2, and is pressurized by a pressing operation via a pressing plate 20. Air is blown into the inner container 3, and hot water in the inner container 3 is pushed out to the outside through the hot water supply passage 5 by the pressure of the pressurized air. Reference numeral 21 denotes a steam discharge passage, and reference numeral 22 denotes a falling water stop valve provided in the middle of the steam discharge passage 21.
[0027]
A metal cover member 23 is fixed to the lower plate 15 of the lid 2, and the outer peripheral edge of the cover member 23 is connected to the water supply port 3 b of the inner container 3 when the lid 2 is closed. A seal packing 24 to be pressed is provided.
[0028]
The electric pump 6 is disposed at a position below the inner container 3 in the middle of the hot water supply passage 5, and a straight pipe portion below the full water level display unit 13 of the inner container 3 in the hot water supply passage 5. 5 a is provided with a flow rate sensor 25 which functions as a flow rate measuring means for measuring the flow rate of hot water passing through the hot water supply passage 5.
[0029]
As shown in FIGS. 3 and 4, the flow rate sensor 25 is provided with a transparent glass tube 26 provided in a straight pipe portion 5 a in the middle of the hot water supply passage 5, and is rotatably supported in the glass tube 26. A rotating body 27 and an optical sensor 28 for detecting the number of rotations of the rotating body 27.
[0030]
The rotating body 27 is rotated by loosely fitting a boss 27a to a rotating shaft 30 which is rotatably supported by bearings 29, 29 provided vertically above and below the glass tube 26 in the hot water supply passage straight pipe portion 5a. As shown in FIG. 5, three driving blades 31, 31, 31, which receive the pressure of the hot water passing through the hot water supply passage 5, and are located above the driving blades 31, 31, 31, as shown in FIG. The light sensor 28 includes a pair of light-shielding blades 32, 32 for blocking irradiation of light from the light-emitting element 28a of the optical sensor 28 to the light-receiving element 28b. The light-shielding blades 32, 32 are square blades that are erected at right angles to the outer periphery of the boss 27a.
[0031]
The light sensor 28 is configured to irradiate light from the light emitting element 28a to the light receiving element 28b at a position outside the glass tube 26 and at a position avoiding the boss 27a in the rotating body 27. The number of rotations of the rotating body 27 can be measured by measuring the number of times that the light irradiation from the light emitting element 28a to the light receiving element 28b is blocked by the light shielding blades 32, 32 in. The light emitting element 28a and the light receiving element 28b are attached to the outer periphery of the glass tube 26, and are held in a box-shaped sensor holder 33 closed by a detachable sensor cover 34. In the present embodiment, the light shielding blades 32, 32 of the rotating body 27 are always positioned between the light emitting element 28a and the light receiving element 28b of the optical sensor 28.
[0032]
In FIG. 1, reference numeral 35 denotes an operation panel unit having various switches described later, 36 denotes a switch board, and 37 denotes a power supply board provided with a drive power supply circuit for driving the electric pump 6.
[0033]
As shown in FIG. 2, the operation panel unit 35 includes a hot water supply switch 38, an unlock switch 39, a boiling / descaling / good night timer switch 40, a heat retention selection switch 41, a fixed hot water supply / kitchen timer switch 42, and a set amount change. Switches 43 and 44, a hot water supply indicator light 45, a boiling indicator light 46, a heat retention indicator light 47, and a liquid crystal display device 48 functioning as a display unit for displaying the amount of hot water supply are provided.
[0034]
The set amount change switches 43 and 44 are operated when changing the time setting at the time of time adjustment, and act as fixed hot water supply setting means for setting the amount of hot water supplied by the electric pump 6 to a predetermined amount. It is also operated when changing the setting of.
[0035]
At the time of normal hot water supply and fixed hot water supply, the various switches and various indicator lamps are operated and displayed as follows.
[0036]
(1) When the normal hot water supply lock release switch 39 is pressed, the hot water supply indicator 45 is turned on, and when the hot water supply switch 38 is pressed, normal electric hot water supply is enabled.
[0037]
(2) Fixed hot water supply When the fixed hot water supply / kitchen timer switch 42 is pressed once, the set amount change switches 43 and 44 light up. When the hot water amount is set by the set amount change switches 43 and 44, the lock release switch 39 is turned on. When the lock release switch 39 is illuminated, the hot water supply switch 38 illuminates, and when the hot water supply switch 38 is pressed, the fixed quantity hot water supply amount displayed on the time / quantity display section 47a of the liquid crystal display section 47 is automatically displayed together with the hot water supply. When the value is reduced to 0 ml, the hot water supply is automatically stopped. During this time, the hot water supply switch 39 is kept pressed. By doing so, the switch operation at the time of fixed-quantity hot water supply is performed in one direction navigated in the order of the fixed-quantity hot water supply / kitchen timer switch 42 → set amount change switches 43 and 44 → lock release switch 39 → hot water supply switch 38, resulting in an operation error. Can be reduced.
[0038]
FIG. 6 is a block diagram showing a configuration of a control system in the electric hot water storage container according to the present embodiment. A microcomputer unit (hereinafter, referred to as a microcomputer) 49 includes the various switches 38 to 44, the temperature sensor 12 and A signal from the flow sensor 25 is input, various arithmetic processes are performed, and the results are output to the electric heater 4, the electric pump 6, the liquid crystal display device 48, and the buzzer 50 as control signals.
[0039]
The microcomputer 49 has, in addition to the various control functions described above, a function as fixed-rate hot water supply setting means for setting the hot water supply amount by the electric pump 6 to a predetermined amount, and supplies hot water by the set hot water supply amount set by the fixed hot water supply setting means. A function as a fixed-quantity hot water supply control means for controlling the drive of the electric pump 6 so as to perform the first signal output from the flow rate sensor 25 from the start of the drive of the electric pump 6, and first set time ts ₁ (e.g., 0.75 seconds) set in advance from the time the signal output there was between until elapses, the hot water supply amount display in the liquid crystal display device 48 to "no hot water amount" indications indicating (e.g., "0" display) the function of the said first set time ts ₁ (e.g., 0.75 seconds) even after the lapse of a second predetermined time that is set in advance ts ₂ ( For example, 0.5 seconds) Until elapse, a function of displaying the hot water supply amount calculated based on the preset flow rate per unit time on the liquid crystal display device 48 irrespective of the actual hot water flow rate, and the second setting After a lapse of time ts ₂ (for example, 0.5 seconds), the liquid crystal display device 48 has a function of displaying a hot water supply amount based on the flow rate measured by the flow rate sensor 25.
[0040]
Next, control at the time of starting hot water supply in the electric hot water storage container having the above configuration will be described with reference to a flowchart shown in FIG.
[0041]
When the hot water supply switch 38 is turned on in step S1, the drive of the electric pump 6 is started to start the hot water supply operation. However, as described above, the hot water reaches the flow rate sensor 25 depending on the amount of hot water and the flow rate is increased. Since a difference occurs in the time until the signal is output from the sensor 25, in order to invalidate the difference, it is determined in step S2 whether or not the signal has been initially input from the flow rate sensor 25. Here, after waiting for an affirmative determination (in other words, waiting for the first signal input), counting of the output signal from the flow sensor 25 is started in step S3. Note that even if there is a signal input from the flow sensor 25, it is necessary to consider the influence of disturbance or the like. Therefore, in step S4, it is confirmed that three signals from the flow sensor 25 have been input, and in step S5 In, a timed timer built in the microcomputer 49 for displaying the amount of hot water supply at the beginning of hot water supply is started.
[0042]
Then, in step S6, it is determined whether or not a _first set time ts1 (for example, 0.75 seconds) has elapsed. If the determination is affirmative, the process proceeds to step S7, where the flow rate sensor 25 Is stopped, and the signal count number counted so far is reset. That is, from the start of driving of the electric pump 6 to the first input of a signal from the flow rate sensor 25 and from the first input of the signal to the lapse of a _first set time ts ₁ (for example, 0.75 seconds). Means that "0" is displayed on the liquid crystal display device 48. Note that the first set time ts ₁ is a time during which a pump discharge amount corresponding to the capacity of the passage on the downstream side of the flow sensor 25 is obtained. In this way, at the time the first set time ts ₁ has elapsed full hot water on the downstream side of the passage of the flow sensor 25, through the hot water passage 5 will be pouring hot water is started, the actual Hot water supply start time can be determined.
[0043]
Next, if it is determined in step S8 that 1.00 seconds have elapsed, then in step S9, the hot water supply amount 10 ml is displayed on the liquid crystal display device 48, and if it is determined in step S10 that 1.25 seconds have elapsed, step S8 is performed. In S11, the hot water supply amount of 20 ml is displayed on the liquid crystal display device 48. That is, until the second set time ts ₂ (for example, 0.5 seconds) elapses after the signal count number is reset in step S7, the preset unit time per unit time is independent of the actual hot water supply flow rate. The hot water supply amount (for example, 10 ml and 20 ml) calculated based on the set flow rate (for example, 10 ml / 0.25 seconds) is to be displayed on the liquid crystal display device 48. In this way, even after the actual hot-water supply in the first set time ts ₁ has elapsed is started, the output signal from the flow sensor 25 there is a time period not stable, in that period, in fact Irrespective of the hot water supply flow rate, the hot water supply amount calculated based on the preset flow rate per unit time (for example, 10 ml / 0.25 seconds) is displayed, and the output signal from the flow rate sensor 25 is stabilized. It is possible to display the hot water supply amount that is not affected by the absence.
[0044]
Next, in step S12, counting of the output signal from the flow sensor 25 is started, and in step S13, the amount of hot water corresponding to the number of output signals from the flow sensor 25 is displayed on the liquid crystal display device 48.
[0045]
Thereafter, when it is determined in step S14 that the hot water supply switch 38 has been turned off, the two-second timer built in the microcomputer 49 is started in step S15, and the hot water supply amount display of the liquid crystal display device 48 flashes.
[0046]
If it is determined in step S17 that the hot water supply switch 38 has been turned ON before it is determined in step S19 that two seconds have elapsed, the hot water supply amount is continuously displayed in step S18, and thereafter, the process returns to step S1.
[0047]
On the other hand, if it is determined in step S19 that 2 seconds have elapsed in the state where it is determined in step S17 that the hot water supply switch 38 has not been turned ON, the process proceeds to step S20, where the buzzer 50 notifies the end of hot water supply. In S21, the hot water supply amount is lit and displayed.
[0048]
Next, in step S22, a 20-second timer built in the microcomputer 49 is started, and before it is determined in step S25 that 20 seconds have elapsed, if it is determined in step S23 that the hot water supply switch 38 has been turned ON, In step S24, the hot water supply amount display is changed to 0, and thereafter, the process returns to step S1.
[0049]
On the other hand, if it is determined in Step S25 that 20 seconds have elapsed while it is determined in Step S23 that the hot water supply switch 38 has not been turned on, the hot water supply lock state (that is, the hot water supply switch 38 is turned on in Step S26). Even if the electric pump 6 is not driven), the process returns to step S1.
[0050]
In the above embodiment, the first signal output from the flow rate sensor 25 has been performed since the start of driving of the electric pump 6, and the first preset signal has been set since the first signal output was performed. Until the set time ts ₁ (for example, 0.75 seconds) elapses, “0” is displayed on the liquid crystal display device 48, but “0” is displayed instead of “0”. Another display (for example, a picture display or the like) representing "no hot water supply" may be used.
[0051]
By the way, in each of the above embodiments, an optical sensor type flow sensor is used as the flow measuring means, but a propeller type, an electric pump interlocking type, a magnetic sensor type, or the like may be used.
【The invention's effect】
[0052]
According to the first aspect of the present invention, an inner vessel for water heater, a heating means for heating the inner vessel, an electric pump for supplying hot water in the inner vessel via a hot water supply passage, and a display for displaying an amount of hot water supply In the electric hot water storage container provided with a flow rate measuring means for measuring a hot water supply flow rate in a straight pipe portion in the hot water supply passage, an initial signal output from the flow rate measuring means from the start of driving of the electric pump is provided. After the first signal output, and before the time when the pump discharge amount corresponding to the capacity of the passage on the downstream side of the flow rate measuring means elapses from the time when the first signal output is performed, the display unit. At the beginning of hot water supply (i.e., at the start of driving of the electric pump), the time until the first signal output from the flow rate measuring means is present. Depending on the amount of hot water The resulting difference is invalidated, and while the hot water is not actually discharged through the hot water supply passage, the hot water supply amount display is made to indicate "no hot water supply". There is an effect that the hot water supply amount display which is not affected by the error of the water supply can be performed. In addition, at the time when the pump discharge amount corresponding to the capacity of the passage on the downstream side of the flow rate measuring means has elapsed, hot water is filled in the passage on the downstream side of the flow rate measuring means, and the hot water is discharged through the hot water supply passage. Is started, and the actual hot water supply start timing can be determined.
[0053]
According to the invention of claim 2 , an inner vessel for water heater, a heating means for heating the inner vessel, an electric pump for supplying hot water in the inner vessel via a hot water supply passage, and a display for displaying a hot water supply amount A hot water supply passage, wherein the hot water supply passage is provided with a flow rate measuring means for measuring a hot water supply flow rate, after the first signal output from the flow rate measuring means from the start of driving of the electric pump. In the period from when the first signal is output to when a first set time set in advance elapses, the hot water supply amount display on the display unit is a display indicating “no hot water supply amount”. In the early stage of hot water supply (that is, at the start of driving of the electric pump), the difference caused by the amount of hot water during the time until the first signal output from the flow rate measuring means is nullified, and the hot water supply passage is provided. Actually through Because while never water is dispensed and as the hot water supply amount display is a display representing a "no hot water amount", there is an effect that can be performed hot water supply quantity display which is not affected by the error of the hot water supply amount in hot water early. After the first set time elapses and before the second set time elapses, the preset set flow rate per unit time regardless of the actual hot water supply flow rate The hot water supply amount calculated on the basis of the above is displayed on the display unit, and even after the first set time has elapsed and the hot water supply has actually started, the output signal from the flow rate measuring means is output. Although there is a time period not stable, in that period, since the hot water supply amount calculated based on the set flow rate per preset unit time regardless of the actual hot-water supply flow rate is to be displayed, the flow rate measuring means There is an effect that the hot water supply amount display which is not affected by the instability of the output signal from the controller can be performed.
[0054]
As in the third aspect of the present invention, in the electric hot water storage container according to the second aspect, the first set time is a time at which a pump discharge amount corresponding to a capacity of a passage on a downstream side of the flow rate measuring means is obtained. In this case, when the first set time has elapsed, the passage downstream of the flow rate measuring means is filled with hot water, so that the hot water starts to be poured out through the hot water supply passage, and the actual hot water supply start timing is determined. be able to.
[0055]
As in the fourth aspect of the present invention, in the electric hot water storage container according to any one of the second to third aspects, after the second set time has elapsed, the electric hot water storage container is based on the flow rate measured by the flow rate measuring means. When the display unit is configured to display the hot water supply amount, after the second set time at which the output signal of the flow measurement unit is stabilized, the hot water supply amount display is performed based on the flow rate measured by the flow measurement unit. As a result, an accurate hot water supply amount display can be obtained.
[0056]
According to the fifth aspect of the present invention, an inner vessel for water heating, a heating means for heating the inner vessel, an electric pump for supplying hot water in the inner vessel via a hot water supply passage, and a display for displaying an amount of hot water supply A hot water supply passage, wherein the hot water supply passage is provided with a flow rate measuring means for measuring a hot water supply flow rate, after the first signal output from the flow rate measuring means from the start of driving of the electric pump. In the period from when the first signal is output to when a first set time set in advance elapses, the hot water supply amount display on the display unit is a display indicating “no hot water supply amount”. In the early stage of hot water supply (that is, at the start of driving of the electric pump), the difference caused by the amount of hot water during the time until the first signal output from the flow rate measuring means is nullified, and the hot water supply passage is provided. Actually through Because while never water is dispensed and as the hot water supply amount display is a display representing a "no hot water amount", there is an effect that can be performed hot water supply quantity display which is not affected by the error of the hot water supply amount in hot water early. A fixed-quantity hot-water supply setting means for setting a hot-water supply amount by the electric pump to a predetermined amount; and a fixed-quantity hot-water supply control means for performing drive control of the electric pump so as to supply hot water by the set hot-water supply amount set by the constant-quantity hot water supply setting means. And the lower limit of the set hot water supply amount by the fixed hot water supply setting means is provided, so that the lower limit is set to the set hot water supply amount when performing the fixed hot water supply, so that the fixed hot water supply is stabilized. There is also an effect that the hot water supply can be performed in a region where the amount can be obtained. Further, the lower limit value of the set hot water supply amount is configured to be equal to or more than a predetermined value irrespective of the signal output from the flow rate measuring means, and the signal output from the flow rate measuring means which is a hot water supply amount having a large error. Since the lower limit of the set hot water supply amount can be set to a value larger than the determined value regardless of the above, there is also an effect that a fixed amount of hot water supply not affected by the error can be obtained.
[0057]
As in the invention of claim 6, in the electric hot water storage container according to claim 5, the first set time is a time at which a pump discharge amount corresponding to a capacity of a passage on a downstream side of the flow rate measuring means is obtained. In this case, when the first set time has elapsed, the passage downstream of the flow rate measuring means is filled with hot water, so that the hot water starts to be poured out through the hot water supply passage, and the actual hot water supply start timing is determined. be able to.
[Brief description of the drawings]
[0058]
FIG. 1 is a longitudinal sectional view of an electric hot water storage container according to an embodiment of the present invention.
FIG. 2 is a plan view of an operation panel unit in the electric hot water storage container according to the embodiment of the present invention.
FIG. 3 is an enlarged vertical sectional side view of a flow rate sensor in the electric hot water storage container according to the embodiment of the present invention.
FIG. 4 is an enlarged cross-sectional plan view of a flow rate sensor in the electric hot water storage container according to the embodiment of the present invention.
5A and 5B show a rotating body which is a component of a flow rate sensor in the electric hot water storage container according to the embodiment of the present invention, wherein FIG. 5A is a side view, and FIG.
FIG. 6 is a block diagram of a control system in the electric hot water storage container according to the embodiment of the present invention.
FIG. 7 is a flowchart showing the contents of control at an early stage of hot water supply in the electric hot water storage container according to the embodiment of the present invention.
FIG. 8 is an explanatory diagram for explaining a relationship between a flow sensor and a water level in a hot water supply passage.
[Explanation of symbols]
[0059]
1 is a container body, 2 is a lid, 3 is an inner container, 4 is a heating means (electric heater), 5 is a hot water supply passage, 6 is an electric pump, 25 is a flow rate measuring means (flow rate sensor), 38 is a hot water supply switch, 48 Is a liquid crystal display, and 49 is a microcomputer.

Claims (6)

A water heater for heating the inner container; a heating means for heating the inner container; an electric pump for supplying hot water in the inner container via a hot water supply passage ; and a display unit for displaying a hot water supply amount . The straight pipe section is an electric hot water storage container provided with a flow rate measuring means for measuring a hot water supply flow rate, after the first signal output from the flow rate measuring means from the start of driving of the electric pump. During the period from the time when the first signal is output until the time when the pump discharge amount corresponding to the capacity of the passage on the downstream side of the flow rate measuring means elapses, the hot water supply amount display on the display unit is displayed as “ An electric hot water storage container characterized in that the display indicates "no hot water supply". An inner container for water heating, heating means for heating the inner container, an electric pump for supplying hot water in the inner container via a hot water supply passage, and a display unit for displaying an amount of hot water supply; Is an electric hot water storage container provided with flow rate measuring means for measuring the hot water supply flow rate, after the first signal output from the flow rate measuring means from the start of driving of the electric pump, the first During a period from when the signal is output to when a first set time set in advance elapses, the hot water supply amount display on the display unit is configured to be a display indicating “no hot water supply amount”, and After the elapse of the first set time and before the elapse of the preset second set time, the preset flow rate per unit time is set regardless of the actual hot water supply flow rate. The calculated amount of hot water is displayed on the display unit. Electrical hot water storage vessel you characterized by being configured to Shimesuru so. 3. The electric hot water storage container according to claim 2, wherein the first set time is a time at which a pump discharge amount corresponding to a capacity of a passage on a downstream side of the flow rate measuring means is obtained. Wherein in after a second set time, any of the claims 2 and 3, characterized by being configured to perform hot water supply amount displayed on the display unit based on the flow rate measured by the flow measuring means electric hot water storage containers or one claim. An inner container for water heating, heating means for heating the inner container, an electric pump for supplying hot water in the inner container via a hot water supply passage, and a display unit for displaying an amount of hot water supply; Is an electric hot water storage container provided with flow rate measuring means for measuring the hot water supply flow rate, after the first signal output from the flow rate measuring means from the start of driving of the electric pump, the first During a period from when the signal is output to when a first set time set in advance elapses, the hot water supply amount display on the display unit is configured to be a display indicating “no hot water supply amount”. A fixed-quantity hot-water supply setting means for setting the amount of hot water supplied by the electric pump to a predetermined amount, and a fixed-quantity hot-water supply control means for performing drive control of the electric pump so as to supply hot water only by the set hot water supply amount set by the fixed-quantity hot water setting means With The lower limit of the configured and the setting hot water supply amount to provide a lower limit value of the set hot water supply amount by the quantitative hot water supply setting means, configured to determined value above and irrespective of the signal output from the flow rate measuring means that electric hot water storage container be characterized in that it was. 6. The electric hot water storage container according to claim 5, wherein the first set time is a time at which a pump discharge amount corresponding to a capacity of a passage on a downstream side of the flow rate measuring means is obtained.

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