JPH0321697Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a water heater equipped with a boiling heater.

[Conventional technology and problems]

Conventionally, various types of water heaters are known.
One equipped with a reboiling command switch and a boiling indicator light is known.

In known water heaters, the switch and indicator light are mounted on the body of a case surrounding the outer periphery of the container. Therefore, it is necessary to form a special space in the case to house the switch and the indicator light, resulting in a problem that the case becomes thicker in diameter. In addition, if the indicator light is attached to the body of the case, when the water heater is placed on a tabletop, the indicator light is located at a low position and cannot be easily seen, and the operability is also not good. There's a problem.

[Means for solving problems]

The present invention provides a water heater that solves the above-mentioned problem, and the means for this purpose is to connect the vicinity of the bottom of the container 3 equipped with the boiling heater 5 to the water inlet 13 via the pumping channel 14, A shoulder member 7 that connects the exhaust port 26a of the air pump 26 to the vicinity of the top of the container and surrounds the outer periphery of the mouth of the container 3.
The beak part 9 covers the water inlet 13 by
In a water heater comprising: the beak portion 9;
At least one of a reboil command switch 51 or a timer set switch 52 and a boiling or heat retention indicator light 49 or a water shortage or timer operation indicator light 50 are installed in the pocket portion 48 formed by recessing the outer surface of the boiler. At least one indicator light is provided inside the pocket portion 48;
The lid piece 57 that closes the switch is provided with actuating pieces 69 and 70 that enable the switch to be operated, and transparent parts 71 and 72 that allow the indicator light to be seen through; the actuating piece 6
9 and 70 are formed by portions surrounded by substantially horseshoe-shaped grooves 67 and 68 formed in the lid piece 57, and the transparent parts 71 and 72 are formed by the window holes 6 formed in the lid piece 57.
5, 66, and the cut grooves 67, 6 are formed by the display sheet 64 attached to the outer surface of the lid piece 57.
8 and window holes 65 and 66.

〔Example〕

An embodiment of the present invention will be described in detail below based on the drawings.

As shown in FIGS. 1 to 3, the water heater consists of a container body 1 and a lid body 2.

The container body 1 includes a bottomed cylindrical container 3 made of a thin stainless steel plate or the like with an open top, and a cylindrical case 4 made of a thin metal plate or the like surrounding the outer periphery of the container 3 at intervals. The container 3 is equipped with an electric boiling heater 5 on the outer periphery near the bottom, and has a water pumping port 6 near the bottom of the container 3 (bottom bottom surface or bottom peripheral surface). A shoulder member 7 is attached to the upper part of the container body 1, and the shoulder member 7 is integrally molded from synthetic resin, connects the upper ends of the container 3 and the case 4, and has a pivot portion of the lid body 2, which will be described later, on the back side. 8 and a beak part 9 on the front part, a decorative member 10 is connected to the lower part of the beak part 9, and a transparent window part 11 extending in the vertical direction is formed in the decorative member 10. are doing. On the other hand, a bottom member 12 made of synthetic resin is attached to the bottom of the container body 1.

The water pumping port 6 of the container 3 is communicated with a water filling port 13 opened at the lower part of the beak 9 of the shoulder member 7 via a pumping channel 14. In the illustrated example, the lower end of the liquid level display tube 15 arranged corresponding to the window 11 is connected via an elbow tube 17 to a mouth tube 16 fixed to the water pumping port 6 of the container 3 by welding or the like. There is. Further, the upper end of the liquid level display tube 15 is connected to a spout 18 that holds the water inlet 13 via an elbow tube 19, and the spout 18 and the water inlet 13 are covered by the beak 9. ing. In the illustrated example, a valve chamber 20 is provided between the elbow tube 19 and the upper end of the liquid level display tube 15.
is formed, and a valve body 21 is inserted into the valve chamber. A narrow passage is formed between the outer periphery of the valve body 21 and the inner periphery of the valve chamber 20 by ribs in the radial direction. When the hot water is forced into the pumping channel 14, the hot water is sent to the spout 18 through the narrow passage formed by the ribs and is discharged from the water inlet 13. On the other hand, when the air pot falls over, the valve body 21 moves within the valve chamber 20 and closes the end opening of the elbow tube 19, so that the hot water in the container 3 flows into the pumping channel 1.
This prevents a large amount of water from leaking from the water inlet 13 via the water inlet 13 through the water injection port 13.

The lid main body 2 is formed into a hollow block body by a synthetic resin bowl-shaped base 22 that is loosely fitted into the shoulder member 7, and a head 23 that covers the upper part of the base 22. is pivotally supported on a pivot portion 8 of the shoulder member 7 via a pivot shaft 8a. Therefore, the axis 8a
The lid main body 2 is rotatable about the fulcrum, and thereby the upper opening of the container main body 1 can be opened and closed. Note that a locking/disengaging mechanism 25a is provided on the front side of the lid body 2, and the lid body 2 is connected to and disconnected from the shoulder member 7 while the lid body 2 is attached to the container body 1.

A bellows-type air pump 26 is installed on the base 22 of the lid body 2, and the cylindrical lower edge of the air pump is fixed to the base 22, and the periphery of the actuating member 24 is fixed to the cylindrical upper edge. . The actuating member 24 forms a guide cylinder part 24b that projects into the air pump, and a valve cylinder 25 is slidably inserted into the guide cylinder part 24b. The lower end of the valve cylinder 25 is the base 2
A switching valve 27 made of an elastic body is provided at the insertion end of the valve 27, which is made of an elastic body and expands to a large diameter below the exhaust port 26a. Inside the air pump 26, a pump return member 28 made of a compression coil spring is interposed between the base 22 and the operating member 24, and is always biased in a direction to push up the operating member 24 and expand the air pump 26. are doing.
The valve cylinder 25 is provided with a locking part 29 that is locked in an extended state with respect to the guide cylinder part 24b, and the switching valve 27 is connected to the exhaust port 2 when the air pump 26 is expanded.
6a.

An actuation button 31 is slidably inserted into an opening cylindrical portion 30 located above the actuation member 24 and opened in the head 23 . When the locking pawl 32 formed on the outer peripheral edge of the lower end of the operating button 31 is engaged with the lower edge of the opening cylindrical portion 30, the top surface of the operating button 31 is substantially flush with the top surface of the head 23. , the actuation button 31 does not protrude upward any further. There is a receiving part 33 at the bottom of the operation button 31.
is formed, and a button return member 34 made of a compression coil spring having a spring constant smaller than that of the pump return member 28 is interposed between the receiving portion 33 and the bottom of the valve barrel 25, and the button return member 34 is made of a compressed coil spring with a spring constant smaller than that of the pump return member 28, and the button return member 34 is arranged such that the operating button 31 is always held upward. It is energizing.
In this state, the intake valve 35 made of an elastic body and attached to the lower end of the receiving part 33 is positioned at a distance above the upper opening edge of the guide cylinder 24b.

The exhaust port 26a is communicated with an air supply port 37 that opens near the top of the container 3 via an air supply path 36. Further, the air supply path 36 is communicated with an outside air port 39 opened in the head 23 via a steam path 38 . In the illustrated example, an air passage member 40 that forms the valve chamber of the switching valve 27 is attached to the lower surface of the base 22, and the air passage member 40 provides a port 41 located at the lower center of the valve chamber. 41 and defines the air supply passage 36 communicating with the valve chamber, while defining a branch passage 42 extending from the port 41 to the steam passage 38. The branch road 42 is
It is communicatively connected to the cylindrical portion 22a formed in the base 22 via the tubes 38a and 38b, and furthermore, the cylindrical portion 22
A is communicatively connected to the cylindrical portion 39a forming the outside air port 39 via the pipe material 38c, thereby forming the steam path 38 from the branch path 42 to the outside air port 39.

A protection plate 43 made of a thin stainless steel plate or the like is provided to cover the flow path member 40 and the tubes 38a, 38b from below, and is fixed to the bottom of the base 22 with screws. In the figure, reference numeral 44 denotes a handle that is disposed across the top of the lid body 2 and whose both ends are pivotally connected to the container body 1.

Thermistors 45 and 46 as temperature detectors are installed near the opening and at the bottom of the container 3, respectively.
is provided.

Further, a water amount detection section 47 is provided at a position of the liquid amount display cylinder 15 corresponding to a liquid amount shortage. The water amount detection section 47 includes a pair of electrodes 47a and 47b that sandwich the liquid amount display cylinder 15 from the outer circumferential side, and electrically insulates both the electrodes 47a and 47b, respectively. , 47b are covered and surrounded by a cylindrical shield body.

On the other hand, as shown in FIGS. 4 to 6, a pocket section 48 is formed by recessing the outer surface of the beak section 9, and the pocket section 48 has a boiling and heat-retaining indicator made of a light emitting diode. A light 49, a water shortage and timer operation indicator light 50 also made of light emitting diodes, a boiling command switch 51, and a timer set switch 52 are installed inside. These indicator lights 49 and 50 and switches 51 and 52 are installed in advance on an insulating board 53.
is inserted into the pocket portion 48. In the example,
A bottom rib 54 that supports the substrate 53 from below is provided at the bottom of the pocket portion 48, and side ribs 54 that support the substrate 53 from both sides are provided on both sides of the pocket portion 48.
5 is provided, and a lid piece 57 is fitted into the opening step 56 of the pocket portion 48. A locking pawl 58 is provided protruding from one end of the bottom surface of the lid piece 57, and the locking pawl 58 is locked in a locking hole 59 of the pocket portion 48. Lid piece 57
A cylindrical boss 60 is protruded near the other end of the bottom surface, and the boss 60 is inserted through a hole 61 in the base plate 53 to face a hole 62 formed in the bottom wall 48a of the pocket portion 48. A screw 63 is screwed onto the cylindrical boss 60 through the hole 62 from the back side of the cylindrical boss 60. A display sheet 64 is attached to the outer surface of the lid piece 57.
Incidentally, the bottom wall 48a has an opening (not shown) for passing a lead wire therethrough.

As shown in FIG. 7, the lid piece 57 has a window hole 65 at a position corresponding to the boiling and heat retention indicator light 49, and a window hole 66 at a position corresponding to the water shortage and timer operation indicator light 50. has been established. Further, the lid piece 57 is provided with a substantially horseshoe-shaped kerf 67 at a position corresponding to the reboiling command switch 51, and a substantially horseshoe-shaped kerf 68 at a position corresponding to the timer set switch 52, Operating pieces 69 and 70 are formed in the portions surrounded by 67 and 68, respectively. That is, the actuating pieces 69 and 70 are each elastically deformable,
When the operating pieces 69 and 70 are pushed into the pocket portion 48 from the outside, the respective switches 51 and 52 are activated.

As shown in FIGS. 8 and 9, the display sheet 64 has a second film 6 on a first film 64a.
The cover piece 57 is made of a laminated film laminated with 4b and an adhesive layer 64c formed on the back side.
will be affixed to. Therefore, this display sheet 64 is
Transparent sections 71 and 72 are provided at positions corresponding to the window holes 65 and 66, respectively, by cutting out only the second film 64b, and annular cutting is performed by cutting out only the second film 64b at positions corresponding to the actuating pieces 69 and 70, respectively. Sections 73 and 74 are provided, and the portions surrounded by the annular cut-outs 73 and 74 form operation display sections 75 and 76, respectively. Therefore,
When the boiling and heat retention indicator light 49 lights up or flashes,
The lighting or blinking state is displayed from the outside on the sheet 64.
Also, when the water shortage and timer operation indicator light 50 turns on or flashes, the lighting or blinking state can be visually recognized from the outside through the transparent part 72 of the display sheet 64. It is. Further, when the operation display section 75 or 76 of the display sheet 64 is pressed from the outside with a finger or the like, the operation piece 69
or 70 is elastically deformed to push the boiling command switch 51 or the timer set switch 52, thereby operating the same switch 51 or 52.

Next, the control circuit will be explained based on FIG.
ROM79, RAM80, input/output port 81,
82, 83, 84, 85, 86, 87, etc., including a water shortage detection circuit 88, a power frequency synchronization pulse generation circuit 89, a temperature comparison circuit 90, an indicator light drive circuit 91, an alarm drive circuit 92, and a heater power control circuit. It is connected to the circuit 93 and the like.

The water amount shortage detection circuit 88 includes the water amount detection section 47
The electrodes 47a and 47b and the shield body 47c constituting the microcomputer 77 are connected to an oscillation circuit 94, a switching circuit 95, and a common terminal (not shown) via lead wires, respectively. is connected to.

The power frequency synchronous pulse generation circuit 89 has a base connected to a step-down transformer 96 (output voltage is, for example, AC12V), and a collector connected to
The collector side of the transistor connected to the Vcc power supply is connected to an external interrupt signal input terminal 82 serving as an input port of the microcomputer 77. That is, every time the voltage waveform of the AC power supply 97 crosses the zero point, a pulse signal p having the same period and phase as the voltage waveform is generated, and this is sent to the external interrupt signal input terminal 82.
The configuration is such that the data is input to the microcomputer 77 via the microcomputer 77.

The temperature comparison circuit 90 compares the detection outputs from the thermistors 45 and 46 with a set value, and
It outputs a signal to the line in response to the temperature detected by 5 and 46. For example, the allowable overheating temperature when the water runs out is 110°C, the boiling operation stop temperature is 97°C, and the temperature when the heating power is turned off is 110°C. 90℃,
A set value such as 80° C. is input in advance as the automatic boiling start temperature, and a predetermined signal from the temperature comparison circuit 90 is input to the microcomputer 77 via the input port 83.

The indicator light drive circuit 91 activates the boil/warm indicator light 49 or the water shortage/timer based on the signal output from the output port 86 of the microcomputer 77 depending on each operating state such as boiling, keeping warm, water supply alarm, timer operation, etc. The operation indicator light 50 is turned on and off.

The alarm drive circuit 92 causes an alarm 98 consisting of a piezoelectric buzzer or the like to emit a sound based on a signal output from the output port 86 of the microcomputer 77 in accordance with each operating state such as boiling, keeping warm, water supply alarm, timer operation, etc. .

The heater power control circuit 93 connects the collector of a transistor connected via a resistor to a heater control signal output terminal 87 serving as an output port of the microcomputer 77 to a trigger terminal of a bidirectional switching element via a resistor, and switching element,
It is connected in series with the heater 5 to which an AC power source 97 is supplied, and controls the bidirectional switching element on/off based on the heater control signal q from the heater control signal output terminal 87, thereby controlling the heater 5. It is configured to allow current from the AC power source 97 to flow for a predetermined period of time.

Next, the operation of the water heater according to the above embodiment will be explained.

When the water runs out, the container 3 is overheated, so
When the lower thermistor 46 detects 110°C or higher,
The pair of indicator lights 49 and 50 both flash, the alarm 98 emits an alarm to notify of an abnormality, and the power to the heater 5 is turned off.

If the lower thermistor 46 does not exceed 110°C, it is determined whether the timer is operating. That is, for example, when the user turns on the timer set switch 52 to go to bed, the timer set switch 52 is turned on for a predetermined period of time (for example, 6
time) The heater 5 is turned off, and the water shortage and timer operation indicator light 50 lights up. After a predetermined time has elapsed or when the timer set switch 52 is turned off, the heater 5 is immediately turned on.

When the timer is not operating, it is determined whether the amount of water in the container 3 is insufficient. That is, the oscillation circuit 94
For example, when the water level in the container 3 is lower than the water level detection unit 47 in a state where 4 MHz electrical vibration is constantly emitted, the pair of electrodes 47
As the capacitance between a and 47b becomes smaller, the coupling between the oscillation circuit 94 and the switching circuit 95 becomes looser, so the switching circuit 95 outputs a signal indicating water shortage, and based on this, the microcomputer 77 issues an alarm command. is output, the alarm 98 sounds, and the water shortage and timer operation indicator light 50 blinks. At this time, the heater 5 is turned off.

When water is replenished into the container 3 and the water level in the container 3 becomes higher than the water amount detection section 47, the pair of electrodes 47
The capacitance between a and 47b increases, and the coupling between the oscillation circuit 94 and the switching circuit 95 becomes tighter, so the signal indicating water shortage from the switching circuit 95 is stopped, and the alarm command from the microcomputer 77 is stopped. Therefore, the alarm 98 stops sounding and the blinking of the water shortage and timer operation indicator light 50 also stops.

When the boiling command switch 51 is turned on, or
When the upper thermistor 45 does not detect a temperature of 97° C. or higher, the boiling and heat retention indicator light 49 flashes to indicate that the boiling operation is in progress, and the heater 5 generates 100% heat to perform the predetermined boiling operation.

A predetermined time (for example, 20 minutes) after energizing this heater 5
When the time has elapsed, both the boiling and heat retention indicator light 49 and the water shortage and timer operation indicator light 50 flash.
The alarm 98 issues an alarm to warn that the boiling operation time has exceeded, and turns off the heater 5.

When it is determined that the water temperature in the container 3 is falling and the lower thermistor 46 detects that it is less than 80°C, the heater 5 generates heat of, for example, 5% of the maximum output (30W) and performs a predetermined heat-retaining operation. The boiling and heat retention indicator light 49 lights up to indicate that the heat retention operation is in progress.

Since water is not poured while the water in the container 3 is being boiled, the air pump 26 is not operated. When the pump is not in operation, the pump return member 28 extends and pushes up the actuating member 24, as shown in the second figure, and the valve cylinder 2, which is locked by the locking portion 29, is
5 is raised, and the switching valve 27 closes the exhaust port 26a of the air pump. Therefore, air supply port 3
The boiling steam that entered the air supply path 36 from the exhaust port 2
The air does not enter the air pump 26 from the air 6a. In this state, the switching valve 27 opens the port 41 of the branch passage 42 to open communication between the air supply passage 36 and the steam passage 38, so that boiling steam entering the air supply passage 36 passes through the steam passage 38. It is discharged into the outside air from the outside air port 39. Therefore, the pressure generated when the water in the container 3 boils is suitably reduced by the path from the air supply port 37 to the outside air port 39 via the steam path 38.

On the other hand, while the hot water in the container 3 is kept at a predetermined temperature after boiling, the hot water can be poured by the air pump 26. That is, the air pump 26
When air is pumped into the container 3 by operating the
The water is poured out from the water inlet 13 through the water inlet. The air pump 26 is operated by pushing the operating button 31 into the open cylindrical portion 30 of the head 23. When the air pump is operated, as shown in the third figure, when the operating button 31 is lowered against the button return member 34, the locking pawl 32 comes into contact with the operating member 24, and the operating member 24 is simultaneously lowered against the pump return member 28 to compress the air pump 26. At this time, the intake valve 35 is connected to the intake opening 24 formed at the upper part of the guide cylinder portion 24b of the actuating member 24.
On the other hand, the valve cylinder 25 is lowered via the button return member 34, and the switching valve 27 is closed to the exhaust port 26.
a is opened, and the port 41 of the branch path 42 is closed. Therefore, the air discharged from the exhaust port 26a due to the compression of the air pump 26 flows through the steam path 3.
8 and does not leak out, and is suitably fed under pressure into the container 3 through the air supply port 37 via the air supply path 36. Note that when repeatedly operating the air pump 26, the operating button 31 is released from the pushing force, and the operating button 31 is returned to the air pump 2 by the button return member 34.
When the air pumps 6 are returned to their original positions by the pump return members 28, the intake valves 35 unblock the intake openings 24a, so outside air is sucked into the air pumps 26 through the clearances between the respective members.

In the above embodiment, the beak 9 is provided with two indicator lights: a boiling/warm-keeping indicator 49 and a water temperature deficiency/timer operation indicator 50; however,
In the present invention, at least one of the two indicator lights 49 and 50 may be provided. Further, the indicator light 49 may have only one function of indicating boiling or keeping warm, and the indicator light 50 may also have only one function of indicating water shortage or tamper operation.

Similarly, in the embodiment, the beak 9 is provided with two switches, the boiling command switch 51 and the timer set switch 52, but the present invention provides for the provision of at least one of the two switches. It is also possible to have one.

[Effect of idea]

As a result of the above-described structure, the present invention utilizes the dead space of the beak 9 when installing a boiling command switch and a boiling indicator light, and stores these switches and indicators in the pocket 48 formed in a recess in the beak 9. A lid piece 5 that houses a light and covers the pocket portion 48.
7 is provided with an operating piece 69 or 70 and a see-through portion 71 or 72, so there is no drawback such as the case becoming thicker than in conventional water heaters.

In addition, since these switches and indicator lights are provided on the beak 9 located at a high position on the front of the water heater, the switches can be easily operated when the water heater is placed on a table. This is excellent because the indicator light can be easily seen.

In particular, according to the present invention, each switch 51, 52
The actuating pieces 69, 70 are formed by portions surrounded by substantially horseshoe-shaped grooves 67, 68 formed in the lid piece 57, and the transparent parts 7 of each indicator lights 49, 50
1 and 72 are formed by window holes 65 and 66 formed in the lid piece 57. Therefore, the actuating piece and the indicator light do not protrude from the outer surface of the beak 9, and the beak 9 can be opened by the flat lid piece 57. It is possible to form a smooth and smart shape without any unevenness. A display sheet 64 is attached to the outer surface of the lid piece 57.
Since the cut grooves and window holes are covered with the above-mentioned cut grooves and window holes, the appearance can be maintained without exposing these cut grooves and window holes to the outside, and furthermore, the display sheet 64 is provided with a display explaining the position of the operation part, etc. By keeping
It is possible to omit the complicated process of directly printing these indications on the case of the water heater, and furthermore, by pasting the indication sheet 64 on the lid piece 57, the cut grooves 67 forming the actuating pieces 69, 70 can be removed. ，
68 and the transparent part 7 forming the indicator lights 49 and 50
1 and 72 in a watertight manner, and the electrical components inside the pocket portion 48 can be reliably protected from troubles caused by water leakage, which is a particularly remarkable effect.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a longitudinal sectional view of the pump when it is not in operation, Figure 3 is a longitudinal sectional view of the pump when it is in operation, Figure 4 is a longitudinal sectional view of the beak showing the main parts, and Figure 5 is the same as in Figure 4. - Line sectional view, Figure 6 is an exploded sectional view of the same essential parts, Figure 7 is a plan view of the lid piece, Figure 8 is a plan view of the display sheet, Figure 9 is an enlarged partial cross-sectional view of the display sheet, FIG. 10 is a block diagram. 1... Container body, 2... Lid body, 3... Container,
4... Case, 5... Boiling heater, 9... Beak, 13... Water inlet, 14... Pumping channel, 47...
Water amount detection section, 48... Pocket section, 49... Boiling and heat retention indicator light, 50... Insufficient water amount and timer operation indicator light, 51... Boiling command switch, 52...
...Timer set switch, 53... Board, 57
... Lid piece, 64 ... Display sheet, 65, 66 ...
Window hole, 67, 68... Cut groove, 69, 70... Actuation piece, 71, 72... Transparent part, 75, 76... Operation display part.

Claims (1)

[Scope of utility model registration request] The vicinity of the bottom of the container 3 equipped with the boiling heater 5 is communicated with the water inlet 13 via the pumping channel 14, the exhaust port 26a of the air pump 26 is communicated with the vicinity of the top of the container, and the outer periphery of the mouth of the container 3 is In a water heater having a beak 9 that covers the water inlet 13 with a surrounding shoulder member 7, a reboiling command switch is provided in a pocket 48 formed by recessing the outer surface of the beak 9. 51 or a timer set switch 52, and at least one indicator light among a boiling or heat retention indicator light 49 or a water shortage or timer operation indicator light 50; a lid piece for closing the pocket portion 48; 57 is provided with actuating pieces 69 and 70 that enable the switch to operate, and transparent parts 71 and 72 that allow the indicator light to be seen through; the actuating piece 6
9 and 70 are formed by portions surrounded by substantially horseshoe-shaped grooves 67 and 68 formed in the lid piece 57, and the transparent parts 71 and 72 are formed by the window holes 6 formed in the lid piece 57.
5, 66, and the cut grooves 67, 6 are formed by the display sheet 64 attached to the outer surface of the lid piece 57.
8 and window holes 65 and 66;