JP2003302102A5 - - Google Patents

Description

[Title of the Invention] Water heater
[Claim of claim]
1. A container for containing a liquid, a heating means for heating the liquid, and a water cut detection means for detecting that the water supply from the water pipe is stopped, wherein the water cut detection means A water heater configured to heat the liquid in the container by the heating means when it is detected that the water supply from the water supply system is stopped, and thereafter keeping the temperature at a predetermined temperature.
2. When the water supply detecting means detects that the water supply from the water pipe is stopped, the heating means heats the liquid in the container, and after a predetermined time has elapsed, the heating means is turned off.Keep warm to the specified temperature after returning from water supplyClaim 1ToWater heater as described.
3. The method according to claim 1, wherein the predetermined temperature is a temperature at which the heat is normally kept.Or 2Water heater as described.
4. The predetermined temperature is set to a temperature different from the temperature usually kept warm.ToWater heater as described.
5. A hot water storage amount detecting means for detecting the amount of liquid in a container, and the amount of water detected by the hot water storage amount detecting means is smaller than a predetermined amount, the water cut detection means detects a water cut-off. Even if it does not heat by the heating meansAdd the liquid to the container when it returns from water supply and heat itThe water heater according to any one of claims 1 to 4, which is configured.
6. The apparatus according to claim 6, further comprising discharge means for discharging the water in the container, wherein the discharge means can discharge the water in the container even in the state where the water supply detection means detects water supply failure. Item 14The hot water supply apparatus according to any one of the above.
7. A cartridge for containing a liquid, a heating means for heating the liquid, a water purification cartridge, and a cartridge detection means for detecting the presence or absence of the water purification cartridge, wherein the cartridge is not attached A water heater configured to heat a liquid when detected by a detection means and thereafter keep the liquid at a predetermined temperature.
8. When the cartridge detection means detects that the water purification cartridge is not attached, the liquid is heated, and then the heating means is turned off., And after detecting that the cartridge has been installed, keep the temperature at the specified temperatureThe hot water supply apparatus according to claim 7, which is configured to
9. A storage amount detection means for detecting the amount of liquid in the container, and if the amount detected by the storage amount detection means is smaller than a predetermined amount, the water purification cartridge is not attached Even if detected by cartridge detection means, heating is not performedAdd a liquid to the container and heat it when it detects that the cartridge is attachedThe hot water supply apparatus of Claim 7 or 8 which comprised it.
Detailed Description of the Invention
[0001]
Field of the Invention
The present invention relates to a hot water supply device connected to a water pipe.
[0002]
[Prior Art]
Heretofore, this type of water heater has been disclosed in Japanese Patent Application Laid-Open No. 2001-263819 as an electric water heater with a water purifier. FIG. 11 is described in the above-mentioned publication.TraditionalElectric water heater with water purifierBlock diagram ofIs an indicator of
[0003]
In FIG. 11, a hot water storage container2If the water level detection means 13 detects the amount of hot water in the water level and detects that the hot water is less than a certain value, the water supply valve 14 is opened to supply clean water to the hot water storage container 2. If it is not confirmed that there is a rise in water, the control means 6 judges that the water is not supplied, turns the heater 4 off, and makes a notification of water supply out using a display unit, a buzzer or the like (not shown).
[0004]
[Problems to be solved by the invention]
However, in the conventional configuration, heating is turned off when water shortage is detected, and there is a problem that various bacteria propagate in the hot water storage container while water shortage is detected.Moreover, when there is no cartridge for water purification and water can not be supplied to the inside of the container and normal operation can not be performed, there is a problem that various bacteria propagate in the container.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned conventional problems, the present invention is to kill the bacteria in the container by performing heating by the heating means when the water cut detection means detects the water cut-off.In addition, when it is detected that the cartridge for water purification is not attached, the liquid is heated to prevent propagation of bacteria in the container.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 comprises a container for containing a liquid, a heating means for heating the liquid, and a water cut detection means for detecting that the water supply from the water pipe is stopped, the water cut detection means When it is detected that the water supply from the water pipe has stopped, the liquid in the container is heated by the heating means, and then the container is kept at a high temperature by keeping the temperature at a predetermined temperature. The bacteria can be kept warm and killed, and the bacteria can be prevented from propagating in the container in the boiling water.
[0007]
In the invention according to claim 2, particularly in claim 1, when the water supply detection means detects that the water supply from the water pipe is stopped, the heating means performs heating of the liquid in the container, and predetermined After a lapse of time, turn off the heating meansKeep warm to the specified temperature after returning from water supplyIn addition to killing the bacteria in the container, power consumption can be reduced.
[0008]
The invention according to claim 3 is particularly claimed1 orIn (2), by setting the predetermined temperature to a temperature at which heat is normally kept, not only the propagation of bacteria in the container can be prevented but also hot water can be used immediately when the water supply is restored.
[0009]
The invention according to claim 4 is particularly claimed1In the above, by setting the predetermined temperature to a temperature different from the temperature for keeping warm normally, for example, when it is lower than the temperature for keeping warm normally, it is possible to reduce the power consumption at the time of keeping warm.
[0010]
The invention according to claim 5 is particularlyIn claims 1 to 4A storage amount detecting means for detecting the amount of liquid in the container, and if the amount detected by the storage amount detection means is smaller than a predetermined amount, the heating means is detected even when water supply is detected by the water supply detection means Do not heat byAdd the liquid to the container when it returns from water supply and heat itWith the configuration, wasteful consumption of power can be suppressed when the amount of residual water in the container is small.
[0011]
The invention according to claim 6 is particularlyIn claims 1 to 4The discharge means is provided to discharge the water in the container, and the water discharge detection means can discharge the water in the container even in the water cut-off state even in the water discharge detection means even in the water discharge detection means. The hot water remaining in the container can be discharged, and the usability can be improved.
[0012]
The invention according to claim 7 relates to a container for containing a liquid, a heating means for heating the liquid, a cartridge for water purification, and a cartridge detection means for detecting the presence or absence of the cartridge.WhenWhen the cartridge detection means detects that the cartridge is not attached, the liquid is heated, and then the liquid is kept at a predetermined temperature, so that there is no cartridge and water is contained in the container. Even when water can not be supplied and normal operation can not be performed, it is possible to prevent bacteria from propagating in the container.
[0013]
The invention according to claim 8 particularly heats the liquid when the cartridge detection means detects that the cartridge is not attached according to claim 7.Predetermined time has elapsedAfter, turn off the heating meansAnd keep it at the specified temperature after detecting that the cartridge is attachedIn addition to preventing the propagation of bacteria in the container, power consumption can be reduced.
[0014]
Claim9In particular, the invention described inIn claim 7 or 8The storage amount detecting means for detecting the amount of liquid in the container, and when the amount detected by the storage amount detection means is smaller than a predetermined amount, the cartridge detection means that the cartridge is not attached Do not heat even if detectedAdds liquid to the container and heats it when detecting that the cartridge is attached atWith the configuration, wasteful consumption of power can be suppressed when the amount of residual water in the container is small.
[0015]
【Example】
Example 1
Hereinafter, Example 1 of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a water pipe, 2 is a branch valve, 3 is a water stop valve. Reference numeral 4 denotes a water heating unit of a water heater housed in the kitchen unit 5, and there is a container 6 for putting water inside. The connection pipe 7 branched from the water pipe 1 by the branch plug 2 is attached to the inlet of the water purification cartridge 9 via the water supply valve 8. A water amount detection sensor 11 is connected to the outlet of the water purification cartridge 9, and a switching valve 10 is connected to the end of the sensor.
[0016]
The water amount detection sensor 11 serves as a water supply detection means for detecting water supply failure, and detects the amount of water passing through. When water passes, the internal blades rotate and a magnet is attached to the rotation shaft to pass the magnet By detecting the number of times with a Hall IC and counting the number of pulses from the Hall IC, the amount of passing water is detected.
[0017]
The container 6 is in contact with a main heater 12 constituting heating means for heating water, an auxiliary heater 13 for keeping the heated water warm, and a temperature sensor 14 comprising a thermistor or the like for detecting the water temperature of the container 6 There is. Furthermore, a pump 15 is attached which is a part of a drainage means for guiding the water in the container 6 to the upper part of the kitchen unit 5.
[0018]
Furthermore, a full water detection sensor 16 for detecting full water is also attached to the top of the container 6. In the present embodiment, the full amount of water in the container 6 is 2000 ml. A faucet 17 provided at the upper part of the kitchen unit 5 communicates with the hot water pipe 18 for introducing hot water in the container, the water pipe 19 connected when the switching valve 10 is off, and the upper part of the container 6 And the steam pipe 20 are stored.
[0019]
Reference numeral 24 denotes a hot water storage amount detection means, and the hot water storage capacity is displayed on the operation unit 22 based on the detection result. The method of detecting the storage water volume is calculated from the driving time of the pump 15 and the amount of water detected by the water amount detection sensor 11, and the details will be described later. Reference numeral 25 denotes a backup means for backing up the detection amount of the hot water storage amount detection means 24 at the time of a power failure.
[0020]
The operation part 22 is provided on the outer surface of the water faucet 17, and the lock release switch 33, the hot water discharge switch 35, and the like for performing the operation of the drainage means described above are provided therein. The details will be described with reference to FIG.
[0021]
In FIG. 2, first, when the purified water is to be discharged, when the purified water switch 31 is pressed, the purified water LED 32 is turned on, and the water supply valve 8 is turned on. When the water supply valve 8 is turned on, the tap water passes through the water purification cartridge 9 and the switching valve 10 is turned off. Once the water purification switch 31 is pressed, the water purification LED 32 is turned off, the water supply valve 8 is turned off, and the water from the water pipe 19 is stopped.
[0022]
Next, the operation of the discharge means for pouring hot water will be described. When the lock release switch 33 is pressed, the lock release LED 34 lights up. If the hot water discharge switch 35 is pressed within the 10 seconds, the pump 15 is driven only while the hot water discharge switch 35 is pressed, and the hot water in the container 6 is discharged through the hot water pipe 18. When the hot water discharge switch 35 is released, the lock release LED 34 is turned off about 10 seconds after that, the pump 15 is turned off, and the hot water discharge from the hot water pipe 18 is inhibited.
[0023]
Next, the details of the hot water amount display example will be described with reference to FIG. The hot water amount 1 LED 36, the hot water amount 2 LED 37, and the hot water amount 3 LED 38 change in accordance with the amount of stored hot water detected by the stored hot water amount detecting means 24 and the detected temperature of the temperature sensor 14.
[0024]
When the temperature detected by the temperature sensor 14 is less than 90 ° C., the hot water quantity 1 LED 36 blinks as shown in FIG. 3 (a). When the temperature detected by the temperature sensor 14 is 90 ° C. or more, the temperature changes according to the amount of stored hot water estimated by the stored amount of hot water detection means 24. When the amount of stored hot water estimated by the amount of hot water storage detecting means 24 is less than 500 ml, as shown in (b), the hot water amount 1 LED 36 is lit and the amount of water detected by the hot water storage amount detecting means 24 is less than 1000 ml, As shown in (c), the hot water amount 1 LED 36 and the hot water amount 2 LED 37 are turned on and detected by the hot water amount detection means 24.The amount of waterIn the case of 1000 ml or more, as shown in (d), the hot water amount 1 LED 36, the hot water amount 2 LED 37, and the hot water amount 3 LED 38 become lighting display.
[0025]
Next, the actual operation will be described with reference to FIGS. 1 to 3. When the power is turned on, after the switching valve 10 is turned on, the water supply valve 8 is turned on. When the water supply valve 8 is turned on, water passes through the water purification cartridge 9 from the water pipe 1 and then is stored in the container 6 by the switching valve 10. When the passing water amount reaches 400 ml by the water amount detection sensor 11, the water supply valve 8 and the switching valve 10 are turned off and the water storage in the container 6 is stopped. Thereafter, the main heater 12 and the auxiliary heater 13 are turned on to heat the water in the container 6.
[0026]
Since the temperature detected by the temperature sensor 14 is less than 90 ° C. on the display of the operation unit 22 at that time, the hot water quantity 1 LED 36 blinks as shown in FIG. 3A. Thereafter, when the temperature detected by the temperature sensor 14 reaches 90 ° C. or more, as shown in FIG. 3B, the hot water quantity 1 LED 36 is turned on. Furthermore, when the temperature detected by the temperature sensor 14 reaches 95 ° C. or more, the switching valve 10 and the water supply valve 8 are turned on again to store water again in the container 6. When the passing water amount reaches 100 ml by the water amount detection sensor 11, the water supply valve 8 and the switching valve 10 are turned off to stop the water storage in the container 6. Here, the hot water storage amount estimated by the hot water storage amount detecting means 24 is combined with the previous hot water storage amount,
400 ml + 100 ml = 500 ml
It becomes. Further, as shown in FIG. 3 (c), the hot water quantity 1 LED 36 and the hot water quantity 2 LED 37 become lighting display. Here, even if a power failure occurs, the backup means 25 stores the hot water storage amount estimated by the hot water storage amount detection means 24.
[0027]
When the power is restored from the power failure, it is returned by the backup means 25 and the stored hot water amount estimated by the hot water storage amount detecting means 24 is reset to 500 ml. When the temperature detected by the temperature sensor 14 reaches 95 ° C., the switching valve 10 and the water supply valve 8 are turned on to store 100 ml of water in the container 6. When such a water supply operation is repeated 15 times, the amount of stored hot water estimated by the stored hot water amount detecting means 24 is
400 ml + 100 ml x 15 times = 1900 ml
It becomes. When the thermistor detection temperature reaches 95 ° C. and the water storage sensor 16 detects 2000 ml of the amount of stored water in the container 6 by 100 ml of water in the container 6, the switching valve 10 and the water supply valve 8 are turned off, End the water storage operation. At the same time, the hot water storage amount estimated by the hot water storage amount detecting means 24 is reset to 2000 ml. Thereafter, when the temperature detected by the temperature sensor 14 reaches 95 ° C., the main heater 12 and the auxiliary heater 13 are turned off. As shown in FIG. 3 (d), the display of the operation unit 22 at that time shows that the hot water 1 LED 36, the hot water 2 LED 37, and the hot water 3 LED 38 are lit. When the temperature detected by the temperature sensor 14 detects less than 95 ° C., the auxiliary heater 13 is turned on to keep the hot water in the container 6 at a high temperature.
[0028]
When the lock release switch 33 is pressed during the repeated boiling operation or heat retention state as described above, the lock release LED 34 is turned on, and when the hot water switch 35 is pressed within 10 seconds, the pump 15 is driven and the inside of the container 6 is The hot water of hot water is let out through hot water pipe 18. At this time, the amount of residual water is judged as follows. In the case of this embodiment, since the hot water discharge capacity of the pump 15 is configured to be 2400 ml in one minute, the hot water discharge rate per second is
2400 ml / 60s = 40 ml/ S
As, it memorizes, it calculates from the pouring quantity per unit second where the drive time of pump 15 is remembered. For example, if it takes 30 seconds for hot water to be poured out,
30s × 40 ml = 1200 ml
The storage amount estimated by the storage amount detection means 24 is, in the case of full water,
2000 ml-1200 ml = 800 ml
It becomes. Then, as shown in FIG. 3 (c), the hot water quantity 1 LED 36 and the hot water quantity 2 LED 37 turn on and display. In addition, when the amount of stored hot water estimated by the stored hot water amount detecting means 24 becomes less than 1000 ml, the water storage in the container 6 is performed every 100 ml until the full water detecting sensor 16 detects full water. At the same time, heating of the container 6 by the main heater 12 and the auxiliary heater 13 is also performed.
[0029]
In the above operation, when the water storage operation is performed in the container 6 or when the water purification water is discharged by the operation of the water purification switch, the water amount detection means 11 detects the flow of water. If the water amount detection means 11 does not continuously detect the flow of water for a predetermined time (10 seconds in this embodiment), the tap water is detected even though the water discharge operation is being performed. Water supply 1 LED 36 and hot water amount 3 LED 38 are alternately blinked to indicate that the water supply has been stopped and the lock is released.buttonSwitch 33 and hot waterbuttonThe acceptance of the switch 35 is prohibited. (Hereinafter, this state is referred to as a water supply detection state.) Subsequently, the operation of the water supply detection state will be described with reference to FIG.
[0030]
When water supply failure is detected, the water supply valve 8 and the switching valve 10 are first turned off in step s1. Then, the temperature detected by the temperature sensor 14 is measured (step s2), and if the temperature T1 is less than 90 ° C., the process shifts to s3 to turn on both the main heater 12 and the auxiliary heater 13 and shifts to step s7. Do.
[0031]
If it is determined in step s2 that the detected temperature T1 is 90 ° C. or more, the process proceeds to step s4, and the detected temperature T1 is determined again. If T1 is less than 95 ° C., the process proceeds to step s5 and the main heater 12 is turned off. The auxiliary heater 13 is turned on to shift to step s7. If it is determined in step s4 that the detected temperature T1 is 95 ° C. or more, the process proceeds to step s6, both the main heater 12 and the auxiliary heater 13 are turned off, and the process proceeds to step s7.
[0032]
In step s7, it is checked whether or not the clean water switch 31, which is a switch for discharging clean water, has been pressed. If the clean water switch 31 is not pressed, the process returns to step s2. On the other hand, if it is detected that the clean water switch 31 is pressed, it returns from the water cut detection state, turns on the water supply valve 8, and starts the flush operation of clean water. .
[0033]
That is, in the water cut detection state, the heating operation is performed so that the detection temperature T1 of the temperature sensor 14 maintains about 95 ° C. until the clean water switch 31 is pressed. It is possible to prevent the propagation of bacteria in the container 6 while detecting water supply failure.
[0034]
In the present embodiment, the main heater 12 and the auxiliary heater 13 are operated to maintain heat retention at about 95 ° C. during detection of water loss, but the heat retention temperature is not limited to 95 ° C. If the temperature is 60 ° C. or higher, the proliferation of bacteria can be suppressed, and the consumption of the amount of power required to maintain the heat retention can be reduced as the heat retention temperature is lowered. It goes without saying that the same effect can be obtained by controlling the on / off of only the auxiliary heater 13 without using the main heater 12 for the heater.
[0035]
Moreover, although it was set as the structure which performs water supply detection using the water quantity detection sensor 14 in a present Example, it does not restrict to this, For example, by the storage water quantity detection means 24 which detects the amount of hot water storage in a container It is also possible to detect water outage from the change in the amount of stored water, and it is also possible to detect water outage using a sensor that detects the sound and vibration of the water pipe.
[0036]
In the present embodiment, 2000 ml of full water in the container 6 and 100 ml of water supplied once into the container 6 are used, but the amount of water is not limited to these.
[0037]
Moreover, although it was set as the structure which prohibits the hot water pouring operation while water supply failure was detected, the lock was released.Button switchAnd hot waterButton switchIt is also possible for the hot water remaining in the container 6 to be expelled and to improve the usability by making it possible to discharge the hot water, even if the water is underflowing.
[0038]
Further, in the present embodiment, the display during the detection of water supply failure is a display by alternately blinking the hot water quantity 1 LED 36 and the hot water quantity 3 LED 38, but this is not limited thereto. For example, the clean water LED 32 is blinked to prompt an operation for recovery. The configuration can also improve the operability. Further, by providing an LED dedicated to detecting water supply, it is possible to make the display contents easy to understand and improve the usability.
[0039]
Moreover, although it was set as the structure which detects the storage amount detection means 24 combining the drive time of the water content detection sensor 11 and the pump 15, and the full water detection sensor 16 in this embodiment, it does not restrict to this, For example, A hole is provided in a part of the bottom, a pressure sensor is arranged to close the hole, a structure for detecting water pressure applied to the pressure sensor, or a float is placed in the container 6, and the height of the float is detected. The same effect can be obtained as a configuration for determining the amount of stored water.
[0040]
(Example 2)
A second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a flowchart showing the operation of the water supply detection state in the second embodiment.
[0041]
When water supply failure is detected, the water supply valve 8 and the switching valve 10 are first turned off in step s1. Then, the temperature detected by the temperature sensor 14 is measured (step s2), and if the temperature T1 is less than 90 ° C., the process shifts to s3 to turn on both the main heater 12 and the auxiliary heater 13 and shifts to step s7. Do.
[0042]
If it is determined in step s2 that the detected temperature T1 is 90 ° C. or more, the process proceeds to step s4 to determine the detected temperature T1 again. If T1 is less than 95 ° C., the process proceeds to step s5 and the main heater 12 is turned off to assist The heater 13 is turned on to shift to step s7. If it is determined in step s4 that the detected temperature T1 is higher than 95 ° C., the process proceeds to step s8.
[0043]
Here, if measurement of elapsed time (hereinafter referred to as clocking) has not been started, the process shifts to step s9 to start clocking and then to step s6. On the other hand, if clocking has already been started in step s8, the process moves directly to step s6. In step s6, both the main heater 12 and the auxiliary heater 13 are turned off, and the process proceeds to step s7.
[0044]
In step s7, it is checked whether or not the clean water switch 31, which is a switch for discharging clean water, has been pressed. If the water purification switch 31 is not pressed, the process proceeds to step s10, and if 5 minutes or more have elapsed from the start of clocking, the process proceeds to step s11 and both the main heater 12 and the auxiliary heater 13 are turned off. , S7, and on the other hand, if 5 minutes or more have not passed or if the timing has not started, the process returns to step s2. When it is detected that the clean water switch 31 has been pressed in s7, the state returns from the water cut detection state, the water supply valve 8 is turned on, and the flush operation of the clean water is started.
[0045]
That is, until the clean water switch 31 is pressed, the heating operation to maintain the detected temperature T1 of the temperature sensor 14 at about 95 ° C. is performed for a minimum of 5 minutes. The main heater 12 is used to keep the temperature high and prevent the growth of bacteria in the container 6 while detecting water loss, and after performing a heating operation to maintain approximately 95 ° C for at least 5 minutes, the main heater 12 By turning off both the heater and the auxiliary heater 13, the power consumed by the heating means can be greatly reduced.
[0046]
In the present embodiment, control is performed to keep the temperature at about 95 ° C. for at least 5 minutes, but the minimum time to keep at high temperature is not limited to 5 minutes, and is sufficient to prevent propagation of bacteria. It goes without saying that it is good if it is time.
[0047]
(Example 3)
A third embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a flowchart showing the operation in the water supply detection state in the third embodiment, and the same steps as those in the first embodiment are assigned the same step numbers.
[0048]
The present embodiment is largely different from the first embodiment in that steps s12 and s13 are added. By the steps s12 and s13, when the hot water remaining in the container 6 detected by the hot water storage amount detecting means 24 is less than 200 ml, the main heater 12 and the auxiliary heater 13 are turned off to stop heating.
[0049]
As a result, when the amount of residual water in the container 6 is small, even if heating and heat retention are performed, clean water is added when returning from water cut, and heating must be performed again, and wasteful heating operation of water shortage is performed. It is possible to eliminate power consumption.
[0050]
In the present embodiment, the remaining water amount of 200 ml is the boundary at which the heating operation is performed, but it is not necessary to be limited to 200 ml. For example, by making the remaining water amount 0 ml as the boundary, when even a little hot water remains in the container By heating, it becomes possible to further suppress the propagation of bacteria.
[0051]
(Example 4)
A fourth embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram of the hot water supply apparatus in the fourth embodiment.
[0052]
The present embodiment is largely different from the first embodiment in that the cartridge detection means 40 for detecting the presence or absence of attachment of the water purification cartridge 9 is provided. The cartridge detection means 40 is constituted by a switch or the like, and when the water purification cartridge 9 is properly attached, the switch constituting the cartridge detection means 40 is turned on to recognize that the water purification cartridge 9 is attached, When this switch is turned off, it is determined that the water purification cartridge 9 is not attached. When it is detected that the water purification cartridge 9 is not attached, a display is made to blink the hot water amount 2 LED 37 of the operation unit 22. Hereinafter, an operation when it is detected that the water purification cartridge 9 is not attached by the cartridge detection means 40 will be described with reference to FIG.
[0053]
FIG. 8 is a flowchart showing an operation when it is detected that the water purification cartridge 9 is not attached.
[0054]
If it is detected that the water purification cartridge 9 is not attached, the water supply valve and the switching valve are first turned off in step s51. Then, the temperature detected by the temperature sensor 14 is measured (step s52), and if the temperature T1 is less than 90 ° C., the process proceeds to s53, both the main heater 12 and the auxiliary heater 13 are turned on, and the process proceeds to step s57. Do.
[0055]
If it is determined in step s52 that the detected temperature T1 is 90 ° C. or higher, the process proceeds to step s54 to determine the detected temperature T1. If T1 is less than 95 ° C., the process proceeds to step s55 and the main heater 12 is turned off to assist The heater 13 is turned on to shift to step s57. If it is determined in step s54 that the detected temperature T1 is 95 ° C. or more, the process proceeds to step s56, both the main heater 12 and the auxiliary heater 13 are turned off, and the process proceeds to step s57.
[0056]
In step s57, it is detected whether the water purification cartridge 9 is attached. If it is not attached, the process returns to step s52, and if it is detected that it is attached, the normal operation is resumed.
[0057]
That is, until the water purification cartridge 9 is properly attached, the heating operation is performed so that the detection temperature T1 of the temperature sensor 14 maintains about 95 ° C. The hot water in the container 6 is kept high by this heating operation. It becomes possible to prevent bacteria from propagating in the container 6.
[0058]
In the present embodiment, the main heater 12 and the auxiliary heater 13 are operated to maintain heat retention at about 95 ° C. when the water purification cartridge is not attached, but the heat retention temperature is limited to 95 ° C. Generally, if the temperature is 60 ° C. or higher, the growth of bacteria can be suppressed, and the consumption of the amount of power required to maintain the heat retention can be reduced as the heat retention temperature is lowered. Moreover, also about a heater, the same effect is acquired also by on-off control of only the auxiliary heater 13 without using the main heater 12. FIG.
[0059]
Also, while detecting that the water purification cartridge 9 is not attached, the lock release switch 33 and the hot water discharge switch 35 are received, and by making the hot water discharge possible, the hot water remaining in the container 6 can be hot water dischargeable. It is also possible to improve.
[0060]
Further, in the present embodiment, the display when the water purification cartridge 9 is not attached is indicated by the blinking of the water amount 2 LED 37. However, the present invention is not limited to this. By making the configuration prompting the attachment, the display contents can be easily understood, and the usability can be improved.
[0061]
(Example 5)
A fifth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a flowchart showing an operation when it is detected that the water purification cartridge 9 is not attached in the fifth embodiment.
[0062]
If it is detected that the water purification cartridge 9 is not attached, the water supply valve 8 and the switching valve 10 are first turned off in step s51. Then, the temperature detected by the temperature sensor 14 is measured (step s52), and if the temperature T1 is less than 90 ° C., the process proceeds to s53, both the main heater 12 and the auxiliary heater 13 are turned on, and the process proceeds to step s57. Do.
[0063]
If it is determined in step s52 that the detected temperature T1 is 90 ° C. or more, the process proceeds to step s54 to determine the detected temperature T1 again. If T1 is less than 95 ° C., the process proceeds to step s55 and the main heater 12 is turned off to assist The heater 13 is turned on to shift to step s57. If it is determined in step s54 that the detected temperature T1 is 95 ° C. or more, the process proceeds to step s58.
[0064]
Here, if the measurement of time lapse (hereinafter referred to as clocking) has not been started, the process shifts to step s59 to start clocking and then to step s56. On the other hand, if clocking has already been started in step s58, the process directly proceeds to step s56. In step s56, both the main heater 12 and the auxiliary heater 13 are turned off, and the process proceeds to step s57.
[0065]
In step s57, it is detected whether the water purification cartridge 9 is attached. If not attached, the process proceeds to step s60, and if 5 minutes or more have elapsed from the start of clocking, the process proceeds to step s61, both the main heater 12 and the auxiliary heater 13 are turned off, and the process returns to s57. If 5 minutes or more have not elapsed or time counting has not started, the process returns to step s52. On the other hand, when it is detected that the water purification cartridge is attached at s57, the normal operation returns.
[0066]
That is, until the water purification cartridge is properly attached, the heating operation is performed such that the temperature T1 detected by the temperature sensor 14 is maintained at about 95 ° C. for at least 5 minutes. The main heater 12 and the auxiliary heater 13 are both heated after keeping the hot water at a high temperature, preventing the growth of bacteria in the container 6, and performing a heating operation to maintain about 95 ° C for at least 5 minutes. By turning off, the power consumed by the heating means can be greatly reduced.
[0067]
In the present embodiment, control is performed to keep the temperature at about 95 ° C. for at least 5 minutes, but the minimum time to keep at high temperature is not limited to 5 minutes, and is sufficient to prevent propagation of bacteria. It goes without saying that it is good if it is time.
[0068]
(Example 6)
A sixth embodiment of the present invention will be described with reference to the drawings. FIG. 10 corresponds to the sixth embodiment.TheIt is a flowchart which shows operation | movement when it detects that the water-purifying cartridge 9 is not attached, and attaches | subjects the same step number to the part similar to Example 4. FIG.
[0069]
The present embodiment is largely different from the fourth embodiment in that steps s62 and s63 are added. By the steps s62 and s63, when the amount of hot water remaining in the container 6 detected by the storage water amount detecting means 24 is less than 200 ml, both the main heater 12 and the auxiliary heater 13 are turned off to stop heating. It has become.
[0070]
As a result, when the amount of residual water in the container 6 is small, even if heating and heat retention are performed, clean water is added to the container 6 when the water purification cartridge is attached, and heating must be performed again. It is possible to eliminate unnecessary heating operation while power is not attached and to reduce power consumption.
[0071]
In the present embodiment, the remaining water amount of 200 ml is the boundary at which the heating operation is performed, but it is not necessary to be limited to 200 ml. For example, by making the remaining water amount 0 ml as the boundary, when even a little hot water remains in the container By heating, it becomes possible to further suppress the propagation of bacteria.
[0072]
【Effect of the invention】
As described above, according to the present invention, by performing the operation of heating the liquid in the container even during water cut detection, the inside of the container is always kept at high temperature to kill the bacteria, and the bacteria in the container under the shutoff water. It can prevent breeding.
Brief Description of the Drawings
FIG. 1 is a block diagram of a hot water supply apparatus according to a first embodiment of the present invention.
FIG. 2 is a view showing an operation unit of the hot water supply apparatus in the first embodiment of the present invention.
(A) A diagram showing the display of the operation unit when the temperature detected by the temperature sensor of the water heater in the first embodiment of the present invention is less than 90 ° C.
(B) Similarly, a diagram showing the display of the operation unit when the temperature detected by the temperature sensor of the hot water supply device reaches 90 ° C. or more and the amount of stored hot water estimated by the stored hot water amount detecting means is less than 500 ml.
(C) The figure which shows the operation part display in case the amount of water which the hot-water-storage-amount detection means of a hot-water supply apparatus detected is less than 1000 ml.
(D) Similarly, a diagram showing the operation unit display when the hot water storage device is full and the heat retention state is achieved.
FIG. 4 is a flowchart showing an operation at the time of water supply detection in the first embodiment of the present invention.
FIG. 5 is a flowchart showing an operation at the time of water supply detection in the second embodiment of the present invention.
FIG. 6 is a flowchart showing an operation at the time of water supply detection in Embodiment 3 of the present invention.
FIG. 7 is a block diagram of a hot water supply apparatus according to a fourth embodiment of the present invention.
FIG. 8 is a flow chart showing the operation without the water purification cartridge in the fourth embodiment of the present invention.
FIG. 9 is a flow chart showing the operation without the water purification cartridge in the fifth embodiment of the present invention.
FIG. 10 is a flowchart showing the operation without the water purification cartridge in the sixth embodiment of the present invention
[Fig. 11] A block diagram showing a conventional water heater and electric water heater
[Description of the code]
1 water pipe
6 containers
9 water purification cartridge
11 Water level detection sensor (water supply detection means)
12 Main heater (heating means)
13 Auxiliary heater (heating means)
15 Pump (discharge means)
22 Operation unit
24 Hot water storage amount detection means
40 Cartridge detection means