JPH0443166Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a siphon-type coffee maker used to make coffee, and more specifically to a siphon-type coffee maker that uses an electric heater to heat liquid. It is.

(Prior Art) The present applicant has developed a system in which the liquid in the container member is heated by an electric heater, and the hot water in the container member can be pumped into the siphon container by the steam pressure generated from the liquid. The company has developed a siphon-type coffee maker and has already applied for utility model registration (Utility Model Application No. 1986-86428, name: Coffee siphon-type electric pot). This siphon-type coffee maker, which has already been filed, is constructed by detachably attaching the siphon container to the liquid supply port of the container body, which is equipped with an electric heater at the bottom of the container member.When brewing coffee, the electric heater is energized. heating the liquid in the container member to increase the pressure in the container member,
After pumping hot water (boiling water) into a siphon container using the steam pressure and extracting coffee ingredients in the siphon container, the switch is manually turned off to stop power supply to the electric heater,
The extracted coffee is returned to the container after waiting for pressure reduction (steam condensation) within the container.
In addition, when brewing coffee, the flavor of the coffee deteriorates if the extraction time of the coffee components in the siphon container is prolonged, so the electricity to the electric heater should be stopped immediately after the hot water is pumped into the siphon container. Delicious coffee can be made by brewing coffee in the siphon container for only the time necessary for the pressure within the container member to naturally reduce.

(Problem to be solved by the invention) However, in the siphon-type coffee maker of the earlier application, after the hot water heated in the container member is pumped into the siphon container, when the power supply to the electric heater is stopped, However, the switch must be manually turned off, which is cumbersome, so there is room for improvement. In addition, when making coffee using this type of siphon-type coffee maker, in order to make delicious coffee, it is necessary to turn on the electricity to the electric heater immediately after pumping up the hot water heated in the container member into the siphon container. It is preferable to turn it off, but in the case of the previously applied siphon type coffee maker, it is not possible to turn it off.
Since turning off must be done manually, the timing of filling the siphon container must be carefully monitored. If you overlook the timing of heating the water, the flavor of the coffee will deteriorate, and if you forget to turn it off, the electric heater will continue to generate heat.

The invention of the present application was made in view of several improvements in the siphon-type coffee maker of the earlier application mentioned above, and after the hot water in the container member is heated into the siphon container, it is automatically transferred to the electric heater. In addition to making it possible to stop the electricity supply, the coffee returned to the container member after extraction of the coffee components is prevented from cooling down, and a mechanism for performing these functions is provided in the existing member (handle). It is an object of the present invention to provide a siphon-type coffee maker that can effectively utilize existing members.

(Means for Solving the Problems) As a means for solving the above problems, the invention of claim 1 of the present application provides an electric heater for boiling water at the bottom of the container member and a handle having a hollow interior. A siphon-type coffee maker comprising: a container body having a container body; and a siphon container capable of sealing a liquid supply port of the container body and pumping up liquid in the container member by steam pressure generated in the container member. An outside air communication path is formed at a suitable location in the container body and the siphon container to communicate the inside of the container member with the outside air when the liquid supply port is closed by the siphon container, and the container is provided in the hollow interior of the handle. a valve device that detects a boiling state within the member and closes the outside air communication passage;
The present invention is characterized by providing a switch that is operated to stop energizing the electric heater due to the operation of closing the outside air communication passage by the valve device, and a lead wire that leads from the switch to the electric heater. .

Further, the invention of claim 2 of the present application provides, in the above-mentioned wallet coffee maker of claim 1, a micro switch that is directly turned off by the operation of closing the outside air communication passage of the valve device as a switch for stopping the energization to the electric heater. It is characterized by the adoption of

Furthermore, the invention according to claim 3 of the present application is provided in the siphon-type coffee maker according to claim 1 above,
It detects the temperature of boiling steam generated inside the container member as a switch that stops the power supply to the electric heater.
It is characterized by the use of a thermo switch that can be turned off.

Furthermore, the invention according to claim 4 of the present application includes a container body having an electric heater for boiling water at the bottom of the container member and a handle having a hollow interior, the liquid supply port of the container body being able to be sealed; In a siphon-type coffee maker equipped with a siphon container capable of pumping up liquid in the container member by steam pressure generated within the container member, the liquid supply port is provided by the siphon container at an appropriate location between the container body and the siphon container. an outside air communication passage that communicates the inside of the container member with outside air in a closed state, and a valve device that opens and closes the outside air communication passage in the hollow interior of the handle; a detection device for detecting, a valve closing operation device for closing the valve device upon receiving a boiling state detection signal from the detection device, and a valve closing operation device for closing the valve device based on the boiling state detection signal emitted from the detection device; The electric heater is characterized by being provided with a switch that is operated to stop energization of the electric heater, and a lead wire that leads from the switch to the electric heater.

Moreover, the device of claim 5 of the present application is the device of claim 1 above.
The siphon-type coffee maker according to item 1, 2, 3, or 4 is characterized in that a heat-retaining container having a heat-retaining effect is used as the container member.

(Function) In the siphon-type coffee maker of each device of claims 1 to 5 of the present application, when the temperature of the liquid in the container member is raised to a boiling state by being heated by the electric heater, the temperature of the liquid in the container member is raised to a boiling state. When the condition is detected, the valve device closes the outside air communication passage, and the switch is automatically turned off to stop power supply to the electric heater. Note that when the outside air communication path is closed with the valve device, the steam pressure inside the container member increases, and the hot water inside the container member is pumped up into the siphon container, and the coffee components are extracted in the siphon container. When the steam in the container member is cooled and condensed by the outside air and the pressure inside the container member is reduced, the coffee in the siphon container is returned into the container member.

The container body has a hollow handle, and the valve device, the switch, and lead wires leading from the switch to the electric heater are provided in the hollow part of the handle. So,
The handle becomes a member for attaching these components (valve device, switch, lead wire), and each component (valve device, switch, lead wire) is installed in a state where they are not exposed to the outside.

Further, in the siphon-type coffee maker according to the invention of claim 1, when the liquid in the container member is raised to a boiling state, the valve device closes and the switch for energizing the electric heater is turned off. but
OFF operation is performed.

In the siphon-type coffee maker of the invention as claimed in claim 2, the switch (micro switch) for controlling energization to the electric heater is directly controlled by the valve device when the valve device performs the operation of closing the outside air communication passage.
OFF operation is performed.

In the siphon-type coffee maker of the invention as claimed in claim 3, the switch (thermo switch) for controlling energization to the electric heater controls the temperature of the boiling steam in the container member after the valve device closes the outside air passage. Detected and turned off.

Further, in the siphon-type coffee maker according to the fourth aspect of the present invention, the switch for supplying electricity to the electric heater is turned off based on a signal from a detection device that detects a boiling state within the container member.

Further, in the siphon type coffee maker according to claim 5, since a heat-retaining container is employed as the container member, the coffee returned into the container member after coffee extraction is kept warm as it is.

(Effect of the invention) In the siphon-type coffee maker according to claims 1 to 5 of the present application, when the liquid in the container member is heated by the electric heater and boils, the valve is activated by detecting the boiling state. Since the switch is automatically turned OFF by operation, there is no need to manually turn off the power supply to the electric heater, making it easier to use, and when the water in the container material boils, it automatically switches to the electric heater. Since the electricity is turned off, there is no need to monitor the timing of hot water in the siphon container in order to make delicious coffee.Moreover, the coffee extraction time in the siphon container becomes longer due to the delay in turning off the switch (the flavor deteriorates). This also has the effect of preventing the problem of the electric heater continuing to generate heat due to forgetting to turn off the switch.

In addition, since the valve device, the switch, and the lead wires leading from the switch to the electric heater are provided in the hollow part of the handle of the container body, the existing handle can be used to connect these components (valve device, switch, lead wires, etc.). )
It can also be used as a mounting member for installing the handle, and the hollow part of the handle can be effectively used as an installation space for each of the components (valve device, switch, lead wire). Even if the handle has a handle, there is an effect that these members are not exposed to the outside of the handle, resulting in a good appearance.

Furthermore, in the siphon-type coffee maker according to the invention of claim 5 of the present application, the container member has a heat-retaining function, so that the coffee returned to the container member after extracting the coffee components in the siphon container is kept warm. It has the effect of

(Embodiments) To explain some embodiments of the present invention shown in Figs. 1 to 15, Figs. 1 to 5 show the first embodiment of the present invention, and Figs. 6 to 9 show the first embodiment of the invention. 10 to 12 show a siphon-type coffee maker according to the second embodiment, FIGS. 10 to 12 show the third embodiment, and FIGS. 13 to 15 show the fourth embodiment.

The siphon-type coffee maker of the first embodiment shown in FIGS. 1 to 5 has an electric heater 9 for boiling water on the bottom surface of a container member 3 for storing liquid, and furthermore, an electric heater 9 for boiling water is provided on the bottom surface of a container member 3 for storing liquid. The container body 1 includes a container body 1 to which a member 4 and a bottom member 5 are attached, and a siphon container 2 which is detachably attached to a liquid supply port 11 of the container body 1.

The container members 3 of the container body 1 are each made of a stainless steel plate, and have a bottom plate 3c near the bottom of a double wall consisting of an outer case 3a and an inner case 3b, and are vacuum insulated to create a vacuum between the double walls 3a and 3b. It has a double wall structure.

The electric heater 9 for boiling water provided on the lower surface of the bottom plate of the container member 3 may be switchable for boiling water and keeping warm.

The shoulder member 4 provided on the upper part of the container member 3 is formed into an annular shape, and a stopper insertion hole 41 is formed in the center of the shoulder member 4, and the bottom of the stopper insertion hole 41 is connected to a supply hole. It is a liquid inlet 11. A spout 42 is formed on the front side of the shoulder member 4, and a handle 6 having a length reaching the outer surface of the bottom member 5 is provided on the rear side of the shoulder member 4. This handle 6 is
The inside is made into a hollow S over its entire length.

A power plug insertion port 51 is provided on the side surface of the bottom member 5.

The siphon container 2 is a large-sized coffee extraction chamber 2.
A glass siphon container body 21 is formed by integrally connecting an elongated pipe-shaped pumping tube 23 to the bottom of the container body 21.
, a filter 24 provided at the bottom of the coffee extraction chamber 22 , a lid 25 provided at the upper opening of the coffee extraction chamber 22 , and a siphon container body 21
and a container holding member 26 for holding the container.

The container holding member 26 has a stopper insertion hole 4 at the bottom of an annular body 27 that holds the bottom outer periphery of the coffee extraction chamber 22.
1 and a handle 29 extending upward from the outer side of the annular body 27.
It is formed by providing A gasket 30 is interposed between the annular body 27 and the outer circumferential surface of the coffee extraction chamber 22 to maintain airtightness between the two. The pumping tube 23 of the siphon container body 21 extends downward through the center of the stopper 28 of the container holding member 26.

This siphon container 2 can be attached to the container main body by fitting the plug part 28 into the plug insertion hole 41.
will be installed on the At this time, the lower end of the pumping pipe 23 has reached near the bottom inside the container member 3. Incidentally, when the siphon container 2 is attached, the gasket 28a of the stopper portion 28 closes the mouth edge of the liquid supply port 11.

This siphon-type coffee maker is formed with an outside air communication passage 7 that communicates the inside of the container member 3 with outside air when the siphon container 2 is attached (when the liquid supply port is sealed). This outside air communication path 7 is connected to the container holding member 2.
6, a hole 71 provided in the bottom wall 28b of the plug portion 28, a cavity 72 in the plug portion 28, a hole 73 provided in the side wall 28c of the plug portion 28, and a hole 74 provided in the side wall 43 of the shoulder member 4. An air passage 75 formed laterally in the upper extension part 61 of the handle 6 and a discharge port 76 (FIG. 2) provided in the side wall 62 of the upper handle extension part 61 form a series of passages. The air passage 75 in the handle upper extension part 61 becomes a part of the hollow S in the handle 6. And this air passage 7
5 is provided with a valve seat 77 that is opened and closed by a valve member 32 of a valve device to be described next. This outside air communication path 7 is for preventing the pressure inside the container member 3 from increasing before the liquid (water) inside the container member 3 boils when heated by the electric heater 9. The generated steam can be released into the outside air through the outside air communication path 7.

A valve device 31 is provided in the outside air communication passage 7 and operates to detect the vapor temperature of the liquid in the container member 3 and shut off the outside air communication passage 7 when the liquid in the container member 3 boils. This valve device 31 includes a valve member 32 that is installed laterally in an air passage 75 in a handle upper overhang 61 and opens and closes a valve seat 77.
and the valve member 32 in the opening direction (leftward in the illustrated state).
The valve member 32 is configured to include a coil spring 33 that biases the valve member 32 in the closing direction (rightward in the illustrated state). The coil spring 34 that biases the valve member 32 in the closing direction is made of a shape memory alloy that changes its shape suddenly at a specific temperature, and at temperatures below the specific temperature, the coil spring 33 biasing the valve member 32 in the opening direction is biased. It has a property that the elastic force is small, and when the temperature of the vapor generated when the liquid in the container member 3 boils is detected, the elastic force becomes suddenly larger than that of the coil spring 33 on the biasing side in the opening direction. Therefore, when the inside of the air passage 75 is lower than the deformation temperature of the shape memory alloy coil spring 34, the valve member 32 is moved to the left-hand opening state by the coil spring 33 on the opening direction biasing side (FIGS. 1 and 2). The steam generated inside the container member 3 can be freely released into the outside air through the outside air communication passage 7, and when the liquid inside the container member 3 reaches a boiling state, When high-temperature steam that is generated flows through the air passage 75, and the shape-memory alloy coil spring 34 detects the high-temperature steam, the elastic force of the shape-memory alloy coil spring 34 increases rapidly, and the coil spring 34 is biased in the opening direction. The valve member 32 resists the coil spring 33 of
The valve is moved in the closing direction (rightward movement direction) to maintain the valve in the closed state (Fig. 3).

The valve member 32 has its valve closing operation direction (rightward).
A protruding rod 35 is provided that protrudes further outward toward the air passage 75 through the partition wall 75a of the air passage 75. This protruding rod 35 is used to turn off a switch 10A for controlling power supply to the electric heater 9, which will be described next.

A switch 10A for controlling the supply of electricity to the electric heater 9 is provided at an outward position within the handle upper extension portion 61 (which forms part of the hollow S within the handle 6). The switch 10A is a micro switch in this first embodiment. This micro switch 10A is maintained in the ON state when the valve member 32 is in the valve open state (leftward movement state), and when the valve member 32 is operated in the valve closing direction, as shown in FIG. The protruding rod 35 of the valve member 32
Press the switch lever 10Aa with the tip of the switch to turn it OFF.
The condition is maintained. Incidentally, FIG. 5 shows the electric circuit of the siphon-type coffee maker of the first embodiment, and in the figure, reference numeral 8 designates a pilot lamp.

Further, in the vicinity of the installation position of the micro switch 10A, after the micro switch 10A is turned off by the valve closing operation of the valve member 32, the valve member 3
An OFF maintaining member 13 for maintaining the micro switch 10A in the OFF state even when the micro switch 2 returns to the open state, and an OFF releasing member 16 for releasing the OFF maintained state by the OFF maintaining member 13 are provided. ing. The OFF maintaining member 13 is formed of a plate spring, and a protruding locking portion 14 for holding the switch lever 10Aa of the micro switch 10A in the OFF state is formed on the plate spring. As shown in FIG. 3, when the switch lever 10Aa of the micro switch 10A is pressed by the valve member 32 and turned OFF, the tip of the switch lever 10Aa becomes a plate spring (OFF maintenance member). 13 is bent to climb over the locking portion 14, and the switch lever 10Aa is locked to the locking portion 14. When the switch lever 10Aa is locked to the locking portion 14, even if the valve member 32 operates in the opening direction and the pressing force on the switch lever 10Aa is released as shown in FIG. It remains held by the locking portion 14, and therefore the microswitch 10A is maintained in the OFF state. The OFF release member 16 is formed in the form of a push button, and is attached to the upper part of the handle 61.
It is installed so that it can be pressed from the outside of the side wall 63 of. When the push button portion 17 of this OFF release member 16 is pushed in as shown by a chain line 16' in FIG. When the leaf spring 13 is bent outward, the switch lever 10
When Aa is released from the lock, the switch lever 10Aa automatically returns to the ON position as shown by a chain line 10Aa'.

The switch 10A and the electric heater 9 provided on the lower surface of the container member bottom plate 3c are connected by a lead wire R, and this lead wire R is led from the switch 10A through the hollow S portion of the handle 6 to the electric heater 9. .

To explain how to use and function the siphon-type coffee maker of the first embodiment, when using this coffee maker, first fill water into the container member 3, and then set the siphon container 2 into the container body 1. . At this time, the outside air communication path 7
The temperature inside the air passage 75 is lower than the deformation temperature of the coil spring 34 made of a shape memory alloy, the valve member 32 is maintained in the left-hand valve open position, and the micro switch 10A is in the ON state. .
When a power plug (not shown) is connected to the plug insertion port 51, the electric heater 9 for boiling water is energized and the liquid in the container member 3 is heated. When the liquid is heated, steam is generated, but the valve member 32
Until the valve is closed, the steam is released to the outside through the outside air communication passage 7, and the pressure inside the container member 3 does not increase. When the liquid in the container member 3 is heated to a boiling state and high-temperature steam flows through the air passage 75 of the outside air communication passage 7, the high-temperature steam is detected and the shape-memory alloy coil spring 34 deforms and expands to release its elasticity. The force increases rapidly, operating the valve member 32 in the rightward valve closing direction, thereby blocking the outside air communication passage 7 and turning off the micro switch 10A (FIG. 3). At this time, the power supply to the electric heater 9 is stopped, but steam is still actively generated from the boiling water, and the pressure inside the container member 3 is increased due to the outside air communication path 7 being cut off. The hot water in the container member 3 is then pumped up into the coffee extraction chamber 22 through the pumping pipe 23, where the coffee components are extracted. When the pressure inside the container member 3 is reduced due to steam condensation due to natural cooling, the coffee extracted in the coffee extraction chamber 22 is sucked into the container member 3 through the pumping pipe 23. Further, when the temperature inside the air passage 75 of the outside air communication passage 7 becomes lower than the deformation temperature of the coil spring 34 made of a shape memory alloy, the elastic force of the coil spring 34 is rapidly attenuated, and the valve material 32 moves in the left-hand valve opening direction. It operates. At that time, the switch lever 10Aa by the valve member 32
The pressing force on the switch lever 1 is released, but the switch lever 1
0Aa is maintained in the OFF state by the OFF maintaining member 13, so that the electric heater 9 is not inadvertently energized. The coffee returned into the container member 3 is not easily cooled down because the container member 3 has a vacuum-insulated double wall structure. Note that the electric heater 9 may be one that can be switched between boiling water and keeping it warm, and the coffee inside the container member 3 may be kept warm by the keep-warm heater. Further, when the coffee in the container member 3 is kept warm only by the heat insulation effect of the container member 3, the temperature of the coffee gradually decreases over time,
When you want to heat the coffee inside, remove the siphon container 2 from the container body 1 and press the OFF release member 16 to release the lever held by the OFF maintaining member 13, and the switch lever 10 will be activated.
Aa automatically returns to the ON position, and the electric heater 9 is energized to reheat the coffee in the container member 3.

As described above, according to the siphon-type coffee maker of the first embodiment, when the liquid in the container member 3 is raised to a boiling state during coffee extraction,
Since the micro switch 10A is automatically turned off by the valve device 31 that detects this and operates, there is no need to stop the power supply to the electric heater 9 (switch OFF operation) after boiling the water. In addition, there is no need to monitor the timing of boiling water, and problems such as turning the switch on too late (reducing the flavor of the coffee) or forgetting to turn it off can be eliminated.

Also, with this saifon style coffee maker,
Since the valve device 31, the switch 10A, and the lead wire R are provided in the hollow S portion of the handle 6, the handle 6 can be connected to these members (valve device 31, switch 10A, and lead wire R).
0A, lead wire R) can be used as a mounting member.
In addition, the hollow S portion of the handle is connected to each member (valve device 31,
It can be effectively used as an installation space for the switch 10A, lead wire R), and each component (valve device 3
1. Since the switch 10A and lead wire R) are not exposed to the outside of the handle, the appearance does not deteriorate even if these members are provided.

In the second embodiment of the siphon-type coffee maker shown in FIGS. 6 to 9, a flexible cover 78 such as a rubber film is provided on the outside of the protruding rod 35 of the valve member 32 installed in the air passage 75. The steam flowing through the outside air communication path 7 is connected to the micro switch 10.
This prevents it from flowing to the A side. Further, in this second embodiment, as shown in FIG. 9, a manual switch 80 for controlling the electric heater 9 on and off is provided separately from the micro switch 10A. Further, the micro switch 10A is configured to operate when the valve device 31 is opened.
The OFF state is maintained, and when the valve device 31 is closed (when the valve member 32 is right-handed closed as shown in FIG. 8).
It is now in the ON state. In FIG. 9, reference numeral 81 is a relay coil that is excited when the micro switch 10A is turned on, and 82 is a relay contact that is turned on when the relay coil 81 is in an excited state. In the second embodiment of the siphon-type coffee maker, when the manual switch 80 is turned on, the electric heater 9 is energized and the liquid in the container member 3 is heated, and the liquid in the container member 3 is brought to a boiling state. Then, the elastic force of the shape memory alloy coil spring 34 increases and closes the valve member 32 (eighth
figure). At this time, the micro switch 10A is turned ON by the valve member 32, and the relay 81 is energized, thereby operating the manual switch 80 via the relay contact 82 to turn it OFF.
When this manual switch 80 is turned off, the electric heater 9 with a large resistance value almost stops energizing (generating heat), and then when the temperature inside the air passage 75 falls below the deformation temperature of the coil spring 34 made of a shape memory alloy. , the valve member 32 opens, the micro switch 10A turns off, the relay 81 demagnetizes, and the relay contact 82 turns off. still,
When reheating the coffee in the container member 3,
Simply turn on the manual switch 80. In this way, even in the case of the second embodiment, when the inside of the container member 3 reaches a boiling state, the power supply to the electric heater 9 is automatically stopped.

In the third embodiment of the saifon type coffee maker shown in FIGS. 10 to 12, the electric heater 9
A thermoswitch 10B is used as a switch to control the energization. This thermoswitch 10B has a built-in reversing spring 10Ba made of bimetal, which maintains the ON state at low temperatures (Fig. 10), and turns OFF when a high temperature exceeding the reversing operating temperature of the reversing spring 10Ba is detected. (Figure 11). Also, this reversal spring 10Ba
When the switch is in the OFF state (the state shown in FIG. 11), it remains in the OFF state unless operated from the outside. And this reversal spring 10Ba
is adapted to return to the ON state shown in FIG. 10 by pressing a push button 89 from the outside in the OFF state. Further, in this third embodiment, an outside air communication passage 7 that is opened and closed by a valve device 31 is formed in the stopper portion 28 of the siphon container 2. The valve member 32 of the valve device 31 is installed vertically in the outside air communication path 7, biased from below by a coil spring 34 made of a shape memory alloy, and biased from above by a normal coil spring 33. . In this valve device 31, when the temperature inside the outside air communication passage 7 becomes higher than the deformation temperature of the coil spring 34 made of a shape memory alloy, the elastic force of the coil spring 34 made of a shape memory alloy increases and the valve member 32 is moved upwardly. The valve is biased in the direction of dynamic valve closing. Moreover, inside the plug part 28, the inside of the container member 3 and the thermoswitch 1 are connected.
An air passage 83 is provided that communicates with the 0B installation section. A valve 84 for opening and closing the passage is provided in the middle of the air passage 83 and is biased in the valve closing direction by a coil spring 85. Incidentally, FIG. 12 shows an electrical circuit diagram of this third embodiment.
In the siphon-type coffee maker of the third embodiment, when the electric heater 9 is energized and the liquid in the container member 3 is brought to a boiling state, the high-temperature steam first causes the coil spring 34 made of a shape memory alloy to have an elastic force. increases and closes the outside air communication passage 7, and the steam pressure that rises accordingly opens the valve 84 in the air passage 73, and the high-temperature steam hits the thermoswitch 10B, turning the reversing spring 10Ba OFF.
As a result, power supply to the electric heater 9 is stopped. Furthermore, when re-energizing the electric heater 9, the reversing spring 10Ba is activated by pressing the push button 89.
It returns to the ON state and the electric heater 9 is energized.

13 to 15 show a fourth embodiment of a siphon-type coffee maker. 1st
3 and 14 correspond to FIGS. 2 and 3 of the first embodiment, respectively, and FIG. 15 corresponds to FIG. 13 and 1.
4 is an electrical circuit diagram of the siphon-type coffee maker shown in FIG. 4. In the coffee maker of the fourth embodiment, a detection device (in this embodiment, a thermistor 36a and a comparator 36b as shown in FIG. A permanent magnet 38 is provided at the tip of the protruding rod 35 of the valve member 32, and the permanent magnet 3
An electromagnetic coil 39 is provided at a position spaced outward by an appropriate distance from the detection device 36.
When a boiling detection signal is issued, the switch 40 for energizing the electromagnetic coil 39 is turned on, and the switch 10C for energizing the electric heater 9 is turned on.
A relay circuit 45 for OFF operation is provided. In this fourth embodiment, a permanent magnet 38 and an electromagnetic coil 39 provided on a valve member 32 constitute a valve closing operating device 37 within the scope of the utility model registration claims. In FIG. 15, reference numeral 47 is a rectifier that converts alternating current into direct current. On the front side of the valve member 32, there is a first coil spring (normal one not made of shape memory alloy) 34' that biases the valve in the valve closing direction.
A second coil spring 33 is provided on the rear side of each of the valves to bias the valve in the valve opening direction. The second coil spring 33 has a larger elastic force than the first coil spring 34', so that the valve member 32 is normally maintained in an open state (when the electromagnetic coil 39 is not energized). The siphon-type coffee maker of the fourth embodiment operates as follows. That is, when the liquid in the container member 3 boils due to heating by the electric heater 9, the detection device 36 detects the boiling state and activates the relay circuit 45. Power switch 40
At the same time, the switch 10C for energizing the electric heater 9 is turned off. Electromagnetic coil 3
9 is energized and the electromagnetic coil 39 is excited, the permanent magnet 38 is attracted, the valve member 32 is closed, and the outside air communication path 7 is cut off. When the liquid in the container member 3 boils in this way, the detection device 3 detects it.
6 is detected, the valve member 32 is closed, and the container member 3
The internal pressure increases and the siphon action starts, and at the same time, the electricity supply to the electric heater 9 is automatically stopped.

Incidentally, each of the siphon-type coffee makers of the second to fourth embodiments also has a valve device 3 in the hollow S portion of the handle 6.
1, switches (10A to 10C), and lead wires R, and have the same effect as in the first embodiment.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the siphon-type coffee maker according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken from FIG. 1, and FIGS. 3 and 4 are state change diagrams of FIG. 2, respectively. , FIG. 5 is an electric circuit diagram of the siphon-type coffee maker shown in FIG. 1, FIG. 6 is a partial longitudinal sectional view of the siphon-type coffee maker according to the second embodiment of the present invention, and FIG. - sectional view, FIG. 8 is a state change diagram of FIG. 7, FIG. 9 is an electric circuit diagram of the siphon-type coffee maker of FIG. 6, and FIG. 10 is a siphon-type coffee maker according to the third embodiment of the present invention. Fig. 11 is a state change diagram of Fig. 10, Fig. 12 is a partial vertical sectional view of
The figure is an electric circuit diagram of the siphon-type coffee maker shown in FIG. 10, FIG. 13 is a partial sectional view (corresponding to FIG. 2) of the siphon-type coffee maker according to the fourth embodiment of the present invention, and FIG. FIG. 13 is a state change diagram (corresponding to FIG. 3), and FIG. 15 is an electric circuit diagram of the siphon-type coffee maker of FIG. 13. 1...container body, 2...siphon container, 3...
...Container member, 7...Outside air communication path, 9...Electric heater, 10A...Micro switch, 10B...Thermoswitch, 11...Liquid supply port, 31...Valve device, 32...Valve member, 34... ...Shape memory alloy coil spring, 36...Detection device, 37...Valve closing operation device.

Claims (1)

[Claims for Utility Model Registration] 1. An electric heater 9 for boiling water at the bottom of the container member 3
The container body 1 has a handle 6 with a hollow S inside, and the liquid supply port 11 of the container body 1 can be sealed, and the liquid in the container member 3 can be pumped out by the steam pressure generated in the container member 3. A siphon-type coffee maker comprising a siphon container 2 that can be raised, the container body 1
An outside air communication path 7 is formed at a suitable location of the siphon container 2 to communicate the inside of the container member 3 with outside air when the liquid supply port 11 is closed by the siphon container 2, and a hollow S of the handle 6 is formed. Inside, there is a valve device 31 that detects a boiling state in the container member 3 and closes the outside air communication passage 7, and a valve device 31 that closes the outside air communication passage 7 and stops energizing the electric heater 9 due to the operation of the valve device 31 to close the outside air communication passage. Switches 10A, 10 operated to stop
A siphon-on type coffee maker characterized in that a lead wire R is provided which leads from the switches 10A and 10B to the electric heater 9. 2 As a switch that stops energizing the electric heater 9, it is directly activated by the operation of closing the outside air communication passage of the valve device 31.
The siphon-on type coffee maker according to claim 1, characterized in that it employs a micro switch 10A that is turned off. 3 A thermoswitch 10 that is turned off by detecting the temperature of boiling steam generated within the container member 3 as a switch that stops the power supply to the electric heater 9
The siphon-type coffee maker according to claim 1, characterized in that B is adopted. 4 Electric heater 9 for boiling water at the bottom of the container member 3
The container body 1 has a handle 6 with a hollow S inside, and the liquid supply port 11 of the container body 1 can be sealed, and the liquid in the container member 3 can be pumped out by the steam pressure generated in the container member 3. A siphon-type coffee maker comprising a siphon container 2 that can be raised, the container body 1
An outside air communication path 7 is formed at a suitable location of the siphon container 2 to communicate the inside of the container member 3 with outside air when the liquid supply port 11 is closed by the siphon container 2, and a hollow S of the handle 6 is formed. A valve device 31 that opens and closes the outside air communication passage 7, a detection device 36 that detects a boiling state inside the container member 3, and a valve device 31 that receives a boiling state detection signal from the detection device 36 is provided inside.
a valve closing operation device 37 that closes the valve; a switch 10C that is operated to stop energizing the electric heater 9 based on a boiling state detection signal issued from the detection device 36; A siphon-on type coffee maker characterized by being provided with a lead wire R guided to the electric heater 9. 5. The siphon-type coffee maker according to claim 1, 2, 3, or 4, characterized in that the container member 3 is a heat-retaining container having a heat-retaining effect.