JPH0449406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to improvements in boiling type electric pots.

[Technical background of the invention and its problems] In conventional electric pots, water is supplied into the pot, the water is raised to a predetermined boiling temperature of, for example, 92°C, and the water heating control is stopped when this temperature reaches 92°C. It was designed to cause the temperature to change to the heat retention operation.
In this way, conventional electric pots boil the water in the pot to a predetermined high temperature without boiling it. However, it is known that tea and coffee taste better if boiled water is used. For this reason, it is desired to develop an electric pot that can boil the water inside the pot, but in this case, if the pot were to have a sealed structure, the pressure inside the pot would become high, which would be extremely dangerous. For this reason, a structure is required to allow the steam inside the pot to escape.
However, in addition to this structure, boiling water also generates steam, so you need to be careful if you have small children or babies around. For this reason, when a boiling operation is to be performed, it is necessary for the user to be sure of the recognition and start the operation, and it is necessary to prevent the boiling operation from being easily performed due to an erroneous operation. For this reason, the inventors of the present invention have considered making the start operation during the boiling operation a little more complicated, but this poses a problem in that it becomes difficult to remember the operating procedure and it becomes troublesome to handle.

[Purpose of the Invention] This invention has been made in view of the above points, and it is possible to slightly complicate the start operation during the boiling operation to prevent the boiling operation from being easily performed due to an erroneous operation. To provide a boiling type electric kettle whose operation at the start of operation can be easily understood, safety can be improved, and handling is simple.

[Summary of the Invention] The present invention includes a water heater for controlling the boiling of water in a pot, a water temperature detector for detecting the temperature of water in the pot, a start switch for starting water heating control in the pot, and a boiling operation instruction. When both the boiling switch and the start switch are turned on, the water heater starts to be energized, and the water temperature detector starts detecting the water temperature, and based on this detected water temperature, the water heater is turned on. A boiling control means that continues until the water in the pot boils and stops energization after boiling, and is provided in the vicinity of a start switch and a boiling switch, respectively, and blinks before operating the corresponding switch, It is equipped with a start indicator and a boiling water indicator that are lit continuously after operation.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a cylindrical case forming an outer cylinder of the pot, and a support plate 2 is attached to the upper opening of the case 1. As shown in FIG. This support plate 2 has a large opening 3 in the center, and a stepped portion 4 is formed around the periphery of this opening 3. A tank 5 formed in a cylindrical shape with a bottom and forming an inner cylinder of the pot is housed inside the case 1.
This tank 5 has a flange 6 on the periphery of the opening at the upper end, and this flange 6 abuts on the step portion 4 via a packing 7. An upper cover 8 is provided on the upper surface side of the support plate 2, and the upper cover 8 is rotatably attached to the support plate 2 via a pin 9. A lock button 13 is provided on the upper lid 8 on the opposite side of the pin 9 so as to be able to move forward and backward. It engages with the joint receiving portion 15. The lock button 13 is biased leftward in the figure by a spring 16, and this biasing force maintains the engagement between the engagement pawl 14 and the engagement receiving portion 15. Then, by moving the lock button 13 in the right direction in the figure against the spring 16, the engagement pawl 14 and the engagement receiving portion 1 are engaged.
5 can be released from the engagement.

An inner cover 18 is provided inside the upper cover 8, and an annular groove 19 is formed on the outer peripheral surface of the inner cover 18. A pair of locking bodies 2 are provided on the upper lid 8 facing each other.
0 and 21 are provided, and these locking bodies 20 and 21 engage with the annular groove 19. One locking body 2
0 is fixed to the upper lid 8, but the other locking body 2
1 is supported so that it can move forward and backward. This locking body 21
has an integral knob 22 and is biased leftward in the drawing by a spring 23, and this biasing force maintains the engagement between the locking body 21 and the annular groove 19. Then, by pinching the knob 22 and moving the locking body 21 in the right direction in the figure against the spring 23, the engagement between the locking body 21 and the annular groove 19 can be released, and this release allows cleaning, etc. The inner cover 18 can be removed from the upper cover 8 at any time.
A packing 25 is attached to the periphery of the lower end opening of the inner lid 18, and this packing 25 is in airtight contact with the flange 6 of the tank 5. Further, a steam cylinder 24 is integrally formed in the center of the upper surface of the inner lid 18 to protrude, and the upper end surface of this steam cylinder 24 is exposed flush to the upper surface of the upper lid 8 through the packing 17, and a plurality of passages are formed on this exposed surface. Pores 26 are provided. A safety valve mechanism 27 is provided inside the steam cylinder 24, and the safety valve mechanism 27 will be described in detail.
A partition plate 8 is attached to the opening at the lower end of the steam cylinder 24, and an opening 29 is formed in the center of the partition plate 28. Below the partition plate 28 is a valve holder 3.
0 is provided, and this valve holder 30 has a tapered surface 3
1, and a valve body 33 formed in the shape of a truncated cone and made of rubber or the like is housed in the recess 32. A movable plate 34 is provided on the upper surface of the partition plate 28 facing the opening 29,
The movable plate 34 is pressed downward by the biasing force of the spring 10 and comes into pressure contact with the partition plate 28, and has an escape port 11 in the center that forms a communication section that communicates the inside of the tank 5 with the atmosphere. The relief port 11 faces the valve body 33 at a distance. Note that 12 is a protective cover that covers the outer periphery of the valve holder 30.

A water heater 35 and a heat-retaining heater 96 formed in the shape of a strip are wound around the outer periphery of the lower end of the tank 5, and a water temperature detector 36 made of, for example, a negative characteristic thermistor and a heat-retaining thermoswitch are installed in the middle.
TRS is installed. A lead-out pipe 37 is attached to the lower end of the tank 5, and the leading end of the lead-out pipe 37 is inclined obliquely upward and projects to the outside of the front side of the case 1. An opening/closing valve mechanism 38 is provided at the protruding end portion, and the opening/closing valve mechanism 38 will be described in detail.
An operating shaft 40 is inserted into the
First and second valve bodies 41 and 42 made of an elastic material such as rubber are attached to each of the valve bodies 0 . The operating shaft 40 is urged leftward in the figure by a spring 43, and this urging force causes the first and second valve bodies 4 to
1 and 42 elastically abut against the peripheral wall of the valve port 39, thereby closing the valve port 39 in a fluid-tight manner. The second valve body 42 integrally has a cylindrical thin wall portion 45 on its periphery, and this thin wall portion 45 is elastically deformed to spread around its outer periphery due to the biasing force of the spring 43, so that the thin wall portion 45 is elastically deformed around the valve port 39. Close to the wall. Therefore, when the operating shaft 40 is operated to move rightward in the figure against the spring 43, the first
The second valve body 41 is separated from the peripheral wall of the valve port 39, and then, with a slight delay, the second valve body 42 is separated from the peripheral wall of the valve port 39, and the valve port 39 is opened. Then, when the operating shaft 40 moves to the left in the drawing due to the biasing force of the spring 43, contrary to the above, first the second valve body 42 comes into contact with the peripheral wall of the valve port 39, and then the first
The valve body 41 contacts the peripheral wall of the valve port 39. Therefore, there is no case where only one of the valve bodies 41, 42 comes into contact with the peripheral wall of the valve port 39 and the other does not, and both valve bodies 41, 42 always come into contact with the peripheral wall of the valve port 39. 39 is reliably closed, and even if the second valve body 42, which comes into direct contact with high-temperature water, deteriorates relatively early, the first valve body 41 can prevent the valve port 39 from being closed. Since it can be maintained, there is an advantage that water will not leak from the valve port 39.

A support fitting 48 is provided on the lower end surface of the tank 5, and a saucer 49 and a controller case 50 are attached to the lower end of the support fitting 48. The saucer 49 is inclined in one direction, and a discharge port 5 is provided at a part of the lower end of the inclination.
1 is formed, and a discharge pipe 52 is connected to this discharge port 51. A control component 53 is provided inside the controller case 50, and a large number of lead wires 54 led out from the control component 53 are connected to the controller case 50.
It is pulled out to the outside of the controller case 50 through a packing 55 provided around the lower end of the controller case 50. A terminal 56 electrically connected to the heaters 35, 96, water temperature detector 36, and thermoswitch TRS is provided on the lower end surface of the tank 5, and the lead wires 54 are connected to the terminal 56. A leg body 60 formed in an annular shape is attached to the lower end opening of the case 1, a bottom plate 61 is provided inside the leg body 60, and a set screw 62 is threaded from the bottom plate 61 to the controller case 50. By tightening this set screw 62, the flange 6 of the tank 5 is attached to the packing 7.
The packing 55, into which the lead wires 54 are inserted, is compressed to seal the inside and outside of the controller case 50.

An overturning switch mechanism 68 is provided on the upper surface of the bottom plate 61, and this overturning switch mechanism 68 is connected to the tapered surface 6.
The base 64 includes a truncated conical recess 63 having a diameter of 3a, a truncated conical weight 65 housed in the recess 63, and a micro switch 69 attached to the upper end surface of the base 64. The micro switch 69 has a push button 66 that protrudes elastically, and the push button 66 opens and closes the energizing circuit for the heaters 35 and 96 by pushing and retracting the push button 66. A movable operation plate 67 is provided on the upper surface of the recess 63, and the push button 66 faces the weight 65 with the operation plate 67 in between.

A transparent water level pipe 70 communicating with the upper and lower ends of the tank 5 is vertically provided on the outside of the side surface of the tank 5.
This water level pipe 70 protrudes to the outside of the front side of the case 1. A decorative panel 71 is attached to the front surface of the case 1, and as shown in FIG. 2, the decorative panel 71 consists of a display section 72 in the upper half and a cover section 73 in the lower half. A vertically long measuring window 74 is formed in the display section 72, and a transparent measuring cover 75 is attached to the measuring window 74 from the inside with screws 76, and the water level pipe 70 is disposed facing inside the measuring cover 75. By visually observing the water level pipe 70 through the metering window 74 and through the metering cover 75, the tank 5
It is now possible to know the amount of water inside.
Further, an operation board 78 is attached to the inside of the display section 72 with screws 79, and a start/cancel switch 80a, a timer switch 80b, a boiling switch 80c, and each of these switches 80a to 80c are operated on this operation board 78. Operation buttons 81a, 81b, 81c and display elements (LEDs) 82a to 82o that display the control status thereof are arranged in a concentrated manner. And each operation button 8
1a to 81c and display elements 82a to 82o face the front surface of the display section 72 through notch holes 83..., 84... formed in the display section 72. In each of the display elements 82a to 82o, 82a is a display element for displaying boiling water, and this display element 82a is provided in the vicinity of the boiling switch 80c. Further, 82b is a display element for displaying a start, and this display element 82b is provided in the vicinity of the start/cancel switch 80a. Further, 82c is a display element for indicating completion of boiling;
d is a display element for displaying a normal water boiling state, 82e is a display element for displaying a heat retention display, and display elements 82f to 82of are for displaying a timer setting.

A cover portion 73 in the lower half of the decorative plate 71 protrudes forward and covers the opening/closing valve mechanism 38. A pouring button 90 is provided inside the tip of this cover portion 73, and this pouring button 90 is rotatably supported via a pin 91 and biased clockwise in the figure by a spring 92. , also has a protrusion 93 on one side, and this protrusion 93
is opposed to and abuts on the operating shaft 40 of the opening/closing valve mechanism 38. By rotating this pouring button 90 counterclockwise in the figure using the pin 91 as a fulcrum against the spring 92, the operation shaft 40 is moved to the right in the figure and the valve port 39 is opened. tank 5
The water inside can be poured out through a spout 95.

FIG. 3 shows a control circuit for controlling the boiling type electric pot according to the present invention, and this control circuit is housed in the controller case 50. The control circuit includes a central processing unit (CPU), random access memory (RAM), read-only memory (ROM), various I/O ports, a clock signal generator, an A/D conversion circuit, etc. A microcomputer 100 is provided, and connected to the microcomputer 100 is a stabilized power supply circuit 101 which is composed of a power transformer, a full-wave rectifier circuit, a transistor, a resistive element, etc., which are well-known as power supplies. Further, the micro switch 69 and the normally open contact RL1a of the water heater relay RL1 are connected in series to the commercial AC power supply 101a, for example.
The 670W water heater 35 is connected, and a series circuit of the heat retention heater 96 and the thermoswitch TRS is connected via the micro switch 69 and the normally open contact RL2a of the heat retention heater relay RL2 in series. Each of the above relays RL1, RL
2 has one end connected to the positive terminal of the full-wave rectifier circuit in the stabilized power supply circuit 101, and the other end connected to the microcomputer 100, so that its operation is controlled by signals from the microcomputer 100. There is. The water temperature detector 36 includes a Zener diode ZD and resistors R1 to R4.
and a reference voltage circuit 1 consisting of a capacitor C.
02 to the microcomputer 100. The microcomputer 100 is also connected to the start/cancel switch 80 via diodes D1, D2, and D3, respectively.
a, a timer switch 80b and a boiling switch 80c are connected. Further, the display section 72 is connected to the microcomputer 100 via resistors R5 to R9. The display elements 82a to 82o are connected to the display section 72 in a matrix circuit, and are selectively controlled to turn on or blink by the microcomputer 100.

The microcomputer 100 has a power supply 101
When power is turned on and a voltage is output to the stabilized power supply 101, an interrupt is generated at regular intervals according to a command from the CPU, and the interrupt process shown in FIG. 4 is performed. That is, when this process starts, other interrupts are first prohibited. Each time an interrupt occurs, each display element (hereinafter referred to as LED) 82a to 8
2o to a predetermined number, for example, LEDs 82a to 82e,
The lights are turned on alternately in groups of 82f to 82j and 82k to 82o. Following this LED lighting process, the timer function performs a counting operation. This counting operation is performed by one each time each interrupt is performed. For example, when the boiling switch 80c is operated, the time required to accept the start/cancel switch 80a is 10 seconds, and the time for accepting the start/cancel switch 80a is 10 seconds. It is used to count the energization time to the heater 35, timer setting time, etc. Next, check whether the water temperature detected by the water temperature detector 36 is 110°C or higher,
If the temperature is 110℃ or higher, it is determined that the water is boiling and the dry cooking set flag is set, then the boiling water is displayed.
The LED 82a and the start display LED 80b are blinked. Further, if the temperature is lower than 110°C, the boiling water display LED 82a and the start display LED 80b are immediately blinked. Next, start/cancel switch 80a, timer switch 8
0b, the state of the boiling switch 80c is captured. If the start/cancel switch 80a is on, it is checked whether the boiling switch 80c has already been turned on, and if it is, the start display LED 82b is switched from flashing to continuous operation, and the boiling switch is turned on. If 80c is not turned on, the boiling water display LED 82a is turned off, and the start display LED 82b is switched from blinking to continuous operation. Next, it is determined by reading from the RAM whether the start/cancel switch 80a was on at the time of the previous interrupt, and if it was on at the time of the previous interrupt, the interrupt is permitted and the process is terminated.

However, if it was off last time, it checks whether the electric pot is currently in operation. If the switch is in the operating state, the switch operation is determined to be a cancellation operation and a cancellation process is performed, and if it is not in the operating state, it is determined to be a start operation and the operation is started. Furthermore, if the previous start/cancel switch 80a is off, then a check is made to see if the timer switch 80b is on. Then, if the timer switch 80b is on, the count of the timer function is cleared, the timer function is set again, and interrupts are permitted, and this process ends. Further, if the timer switch 80b is off, then the boiling switch 80b is turned off.
Check whether c is on. If the switch 80c is turned on, the boiling water display LED 82a is switched from a blinking operation to a continuous lighting operation, and then the count of the timer function is cleared and the boiling operation is processed. Then, interrupts are permitted and this processing is terminated.

Further, the microcomputer 100 is a fifth
Main control processing shown in FIGS. 8 to 8 is performed. First, in FIG. 5, microcomputer 100 reads the states of start/cancel switch 80a, timer switch 80b, and boiling switch 80c, and issues commands to these switches according to the states. This process first allows interrupts, performs initialization, and checks the empty cooking set flag.
If this flag is set, it is determined that dry cooking is occurring, and each LED 82a to 82o is flashed. The reason why we set the dry cooking temperature to 110℃ is because the temperature at boiling will never exceed 100℃.
Furthermore, this was done with consideration to the reliability of operation. In the dry cooking state, the state of the start/cancel switch 80a is also taken in, and if this switch is on, the energy saving/warming operation shown in FIG. 7 is controlled. On the other hand, if it is not in the dry cooking state, the state of the timer switch 80b is read. If this switch 80b is in the on state, the timer setting control shown in FIG. 8 is performed, and if this switch 80b is in the off state, the start/cancel switch 80a is
Take in the state of. If the start/cancel switch 80a is on, the control shown in FIG. 7 is performed, and if it is off, the water temperature is detected by the water temperature detector 36.
Check whether the temperature is below 85℃. If the water temperature is higher than 85°C, the control shown in FIG. 7 is carried out, and if it is below 85°C, the next state of the boiling switch 80c is taken. And this switch 8
If 0c is off, this process is returned to the initialization described above, and if this switch 80c is on, it is checked whether 10 seconds have passed since this switch 80c was turned on, and if 10 seconds have elapsed. If the start/cancel switch 80a is operated before the lapse of 10 seconds, the boiling control shown in FIG. 6 will be performed, and if 10 seconds have elapsed, the control will be returned to the initialization.

The boiling control shown in FIG. 6 is first initialized and the kettle heater relay RL1 is turned on. Subsequently, the water temperature T ₀ in the tank 5 at the time of start is detected based on the signal from the water temperature detector 36 . The internal clock then uses the count function to count the energization time until the water temperature rises by 10°C. and water temperature T
When the temperature reaches T ₀ +10℃, the rate of change in temperature rise is determined from the starting temperature T ₀ and the counted energization time, and from this rate of change, the current temperature of the water in the tank 5 is determined.
That is, the time t ₀ required for the water to boil from T ₀ +10°C is calculated, and the water heater is thereafter energized for the time t ₀ . Thereafter, the water supply heater 35 continues to be energized until this energization time elapses or unless a cancellation operation is performed using the start/cancellation switch 80a. When this energization time has elapsed, the kettle heater relay RL1 is turned off, the boiling completion display LED 82b is turned on, and the boiling water display LED 82a is turned off. and control the seventh
Move to figure. It should be noted that if cancellation occurs during the elapse of the energization time, the control returns to the initialization in the process shown in FIG. 5 described above.

The energy saving and heat retention control shown in FIG. 7 starts with the timer switch 80b and boiling switch 80
Check whether c is turned on. If the timer switch 80b is on, the control shifts to FIG. 8, and even if the timer switch 80b is off, the boiling switch 80
If c is on, the process shifts to the 10 second wait process shown in FIG. When the timer switch 80b and the boiling switch 80c are both in the OFF state, it is next checked whether the water temperature in the tank 5 is below 85°C. If the temperature is not lower than 85°C, the heat retention display LED 82d is turned on, the kettle heater relay RL1 is turned off, and the heat retention heater relay RL2 is turned on, thereby transitioning from the boiling operation to the heat retention operation. In addition, if the water temperature is below 85℃, it is determined that water has been replenished midway through, and the heater relay RL2 is turned off, and the boiling completion display LED8 is turned off.
2b is turned off, the normal kettle display LED 82c is turned on, and the kettle heater relay RL1 is turned on. Next, there is a cancellation using the start/cancel switch 80a, or the water temperature in the tank 5 is 96.5℃.
Is there more than that, or is the timer switch 80b on?
Furthermore, it sequentially checks whether the boiling switch 80c is on or not, and if there is a cancellation, it moves to the initialization of the process shown in FIG. If the switch 80b is on, the process shifts to the process shown in Figure 8, and if the boiling switch 80c is on, the process goes to 10 in Figure 5.
Shift to wait seconds, and switch 80
If c is off, the process returns to the start of turning off the heat-retaining heater relay RL2.

The timer setting process shown in FIG. 8 first turns off the water heater relay RL1, then sets the timer time, and if the start operation by the start/cancel switch 80a is not performed within 10 seconds after this setting, the process will continue. Return to the initialization shown in Figure 5, and then press the start/cancel switch 8 within 10 seconds.
When the start operation with 0a is performed, the timer setting display is displayed until the set timer time elapses.
Turn off the LEDs 82f to 82o one by one. If there is a cancellation operation during the timer operation, the process returns to the initialization process shown in FIG. 5, and when the timer setting time has elapsed, the process shifts to the process shown in FIG. 7.
Note that the timer switch 80b is turned off when the timer time elapses, and the boiling switch 80b is turned off.
c is turned off when boiling control is completed.

In the apparatus of the present invention configured as described above, when water is poured into the tank 5 and the power is turned on, the boiling water display LED 82a and the start display LED 82 first flash, and then the boiling water switch 80 is turned on.
c and prompts the user to operate the start/cancel switch 80a. In this state, when the boiling switch 80c is operated, the boiling water display LED 82a is switched from a blinking operation to a continuous lighting operation. However, in this state, only the start display LED 82b blinks to prompt the start/cancel switch 80a to be operated next. In this state, if you operate the start/cancel switch 80a within 10 seconds, the start display will be displayed.
The LED 82b switches from a blinking state to a continuous lighting state, and the kettle heater relay RL1 is turned on to start supplying electricity to the kettle heater 35, thereby starting a boiling operation. Moreover, if only the start/cancel switch 80a is operated without operating the boiling switch 80c, the boiling water display LED 82a will be turned off.
And the start display LED 82b switches from blinking operation to continuous lighting operation. Also for normal kettle display
The LED 82d lights up and the water heater relay RL1 is turned on to start supplying electricity to the water heater 35, thereby starting the normal water heating operation. At the same time as the start, the water temperature detector 36 starts detecting the water temperature T ₀ in the tank 5. Then, during boiling operation, the energization time count operation starts, and when the water temperature rises by 10℃, the water temperature at the start time T ₀ and 10℃
The rate of change in water temperature rise is determined from the energization time until the water temperature rises, and from that rate of change, the energization time to the water heater 35 required for the water in the tank 5 to boil is t ₀
Calculate. In this manner, during the boiling operation, the energization time until boiling is calculated from the rate of increase in water temperature, and the energization of the water heater 35 is controlled based on the energization time. When this time period has elapsed, water heater relay RL1 is turned off, power supply to the water heater 35 is stopped, and the boiling completion display is activated.
LED82c lights up and LED8 is used to indicate boiling water.
2a goes out. After that, the heat-retaining heater relay RL2 is turned on and the heat-retaining operation is performed. Also,
In the case of normal water boiling operation, when the water temperature reaches 96.5° C., power supply to the water boiling heater 35 is stopped, and power supply to the warming heater 96 is started, thereby shifting to the heat retention operation.

To start the boiling operation in this way, it is necessary to turn on the boiling switch 80c and then turn on the start/cancel switch 80a within 10 seconds, so the user must be aware that the boiling operation will be performed. If the switch is not operated, the boiling operation will not start, and there is no risk of starting the boiling operation mistakenly as a normal water boiling operation. Therefore, the boiling operation is not started unintentionally, and safety can be improved. Moreover, when the boiling operation is started, the boiling water display LED 8
2a and the start display LED 82b blink to prompt the operation of the boiling switch 80c and start/cancel switch 80a, and when the boiling switch 80c is operated in this state, the boiling water display
Only the LED 82a switches to continuous lighting, and the start display LED 82b continues to blink to prompt the next operation, so the LED 82a,
By blinking 82b, the procedure for operating the switch during boiling operation can be easily understood and handling becomes simple. Note that if you directly operate the start/cancel switch 80a while the LEDs 82a and 82b are flashing, the water boils normally, so in this case the boiling water display LED 82a turns off.
The start display LED 82b lights up continuously, indicating that the next switch operation is unnecessary, and the operation can be easily understood in this case as well.

[Effects of the Invention] As detailed above, according to the present invention, by making the start operation during the boiling operation a two-step operation, it is possible to prevent the boiling operation from being easily performed due to an erroneous operation. The blinking display makes it easy to understand the operation at the start of boiling, improves safety, and provides a boiling type electric kettle that is easy to handle.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is an overall sectional view, FIG. 2 is an exploded perspective view of the display section, FIG. 3 is a circuit configuration diagram, and FIGS. 4 to 8 are FIG. 4 is a flowchart showing the control process of the microcomputer, FIG. 4 is a flowchart showing interrupt processing, FIG. 5 is a flowchart showing main processing, and FIG. 6 is a flowchart showing boiling processing.
Figure 7 is a flowchart of normal water boiling and warming process, Figure 8
The figure is a flowchart of timer setting processing. 5...Tank, 35...Kettle heater, 36...Water temperature detector, 80a...Start/cancel switch, 8
0c...boiling switch, 82a...display element for boiling water display, 82b...display element for start display,
96...Warmth retention heater, 100...Microcomputer, RL1...Kettle heater relay.

Claims (1)

[Claims] 1. A water heater for boiling and controlling the water in the pot, a water temperature detector for detecting the water temperature in the pot, a start switch for starting water heating control in the pot, and a boiling switch for instructing boiling operation. By turning on both the boiling switch and the start switch, the water heater starts to be energized, and the water temperature detector starts detecting the water temperature, and based on the detected water temperature, the water heater starts to energize. A boiling control means that continues until the water in the pot boils and stops the electricity supply after boiling, and a boiling control means that is provided in the vicinity of the start switch and the boiling switch, respectively, and is blinking before the corresponding switch is operated. A boiling type electric kettle characterized by being equipped with a start indicator and a boiling water indicator that are continuously lit after operation.