JPS6232489Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electric heating pot.

Normally, electric heating pots boil water until it reaches a temperature of 90 to 95 degrees Celsius, and then maintain this temperature thereafter. This temperature is suitable for making hot drinks such as coffee and tea, and for brewing tea.

By the way, the temperature of the hot water used to dissolve powdered milk for infants is 50 to 55 degrees Celsius in order to dissolve it uniformly without destroying the nutrients.
However, for sterilization, it is necessary to cool the boiled water to the above temperature. For this reason, when breastfeeding with powdered milk, use boiling water or boiling water in a conventional thermos at 50-55℃ each time.
You have to take the time to cool it down. However, during infancy, the intervals between feedings are short, and breastfeeding is necessary even during the night, so if you are breastfeeding with powdered milk,
Preparing hot water for powdered milk was a huge burden for mothers.

In view of these circumstances, the present invention is capable of selectively heating and keeping hot water at a desired temperature, such as the above-mentioned hot water suitable for dissolving the powdered milk, in addition to conventional boiling water, and also eliminates the need for hot water at the desired temperature. The aim is to provide an electric heat-retaining pot that can be obtained after boiling the water.

The present invention consists of a heater circuit that heats water until it becomes boiling water and then keeps it at a predetermined temperature, and a heater circuit that heats water until it becomes boiling water and then keeps it warm at a predetermined temperature lower than the predetermined temperature as necessary. It is characterized by having a heater circuit connected so that the heater can be shared by a changeover switch.

Specifically, this invention has a heater for temperature increase, a heater for heat retention, and a heater that turns off when the temperature exceeds T ₁ .
A temperature switch for high temperature heating that turns on when the temperature drops to T ₂ (T ₁ > T ₂ ), a manual reset temperature switch for heating at an appropriate temperature that turns off when the temperature reaches approximately the same as the above temperature T ₁ , and A temperature switch for maintaining high temperature that turns on and off within the range of temperature T ₁ and temperature T ₂ , a temperature switch for maintaining appropriate temperature that turns on and off in a temperature range lower than the above temperature T ₂ , and the temperature increasing heater. a first changeover switch for switching and connecting the temperature switch for high temperature heating and the temperature switch for proper temperature heating; and a first switch for switching between the temperature switch for high temperature heat retention and the temperature switch for proper temperature heat retention for the heat retention heater. and a second changeover switch for connecting the first changeover switch and the second changeover switch so that the first changeover switch connects the temperature switch to the high temperature heating temperature switch. When the temperature increasing heater is energized, the second changeover switch energizes the heat retention heater via the high temperature heat retention temperature switch, while the first changeover switch energizes the heat retention heater through the appropriate temperature heating temperature switch. When the temperature increasing heater is energized, the second changeover switch is configured to energize the temperature retaining heater via the appropriate temperature retaining temperature switch.

FIGS. 1 and 2 are a cutaway view of essential parts and an electric circuit diagram, respectively, of an embodiment of an electric heat-retaining pot according to the present invention.

On the bottom surface of the heat-resistant inner container 1, an annular temperature increasing heater 2, a heat retaining heater 3, and temperature switches 4 and 6 for detecting the temperature of the bottom surface of the container 1 are arranged. Furthermore, temperature switches 5 and 7 are arranged on the outer surface of the container 1. The temperature switch 4 and the temperature switch 6 are two-pole changeover switches 8 for the temperature rising heater 2.
They are connected so that they can be switched and energized at one switching section. Further, the temperature switch 5 and the temperature switch 7 are connected to the heat-retaining heater 3 so that they can be switched and energized by the other switching section of the changeover switch 8. Of course, the temperature raising heater 2 used has a larger capacity than the temperature retaining heater 3.

The temperature switch 4 is a high-temperature heating temperature switch that turns off at an operating temperature of, for example, 95 to 100°C, and returns at a return temperature of 85°C to control energization of the heater 2. The temperature switch 6 is a manual reset type temperature switch for heating at an appropriate temperature, which turns off at an operating temperature of, for example, 95 to 100°C. Such a temperature switch is
A well-known combination of a temperature-sensitive magnetic material, a permanent magnet, a spring mechanism, etc. is used. As an example, a manual return type will be explained with reference to FIG.

In FIG. 3, a temperature-sensitive magnetic body 63 is fixed to a heat-receiving part that is to be brought into contact with the detected part, and a permanent magnet 64 is provided so as to be able to attract and separate from this temperature-sensitive magnetic body 63. The magnet 64 is fixed to the movable plate 62, and the magnet 64 is attached between the movable plate 62 and the heat receiving part with a force smaller than the attractive force that acts between the temperature-sensitive magnetic body 63 and the magnet 64 when they exhibit ferromagnetism. 64 is a temperature-sensitive magnetic material 63
A coil spring 65 is provided that acts to move the object away from the object. When the temperature of the heat receiving section reaches the operating temperature, the temperature sensitive magnetic body 63 becomes paramagnetic, the magnet 64 moves downward together with the movable plate 62, and this is transmitted by the operating rod 61.

Referring to FIG. 1, in this embodiment, a temperature switch is constructed in which when the bottom surface of the container 1 reaches approximately 100 DEG C., the operating rod 61 moves downward to open the contact 66. The displaced magnet 64 can be returned to the position shown in FIG. 3 by the connecting rod 9 after the temperature has decreased.

On the other hand, the temperature switch 5 is set within the range of the operating temperature and the return temperature of the temperature switch 4, for example, 90 to 95°C.
This is a high-temperature heat retention temperature switch that controls turning on and off the power supply to the heater 3. Also temperature switch 7
is a temperature switch for keeping the temperature at an appropriate temperature, which controls on/off the power supply to the heater 3 in a temperature range lower than the return temperature of the temperature switch 4, for example, 50 to 55°C, which is suitable for melting powdered milk. As such a temperature switch, for example, a well-known one that is a combination of a temperature-sensitive magnetic material, a permanent magnet, and a reed switch is used.

As shown in FIG. 4, the changeover switch 8 is operated by moving the operating lever 10 protruding from a square-shaped window 11 provided in the outer cylinder of the bottle to the left and right as shown by solid lines and dashed-dotted lines in the figure. Can be switched. When the temperature is set to the terminal b-b' side, that is, to the appropriate temperature side, the temperature switch 6 which is in the OFF state can be reset by pushing down the operating lever 10 to displace the connecting rod 9 as necessary. . 12 is a spring for returning the operating lever.

In this way, when the changeover switch 8 is set to the a-a' side, the high temperature heating temperature switch 4 is connected to the temperature raising heater 2, the high temperature keeping temperature switch 5 is connected to the keeping warm heater 3, and the high temperature circuit is connected. It is formed. The temperature of the water put in container 1 is low at first, and switch 4 and switch 5 are both turned on and heater 2 is turned on.
Heating is performed by the heater 3 and the heater 3. When the water temperature rises and exceeds 90°C, first switch 5 is turned off, and then switch 4 is turned off. After that, if the water temperature slowly decreases, turn on the high-temperature insulation temperature switch 5.
The water temperature is maintained at 90 to 95° C. by controlling the power supply to the heater 3 by turning it on and off. Further, water is replenished as hot water is used, and when the water temperature drops below 85°C, the switch 4 is reset and turned on, and heating is performed by the heaters 2 and 3. That is, once the water temperature rises to 95 to 100°C, temperature control by only the warming heater 3 is continued, and power is supplied to the temperature rising heater 2 only when the water temperature drops to 85°C or less.

When the changeover switch 8 is set to the contact b-b' side in such a heat-retaining state, unless the temperature switch 6, which has already been turned off, is not reset, the temperature switch 7 will turn on and off the power to the heater 3. The temperature is kept at 50-55℃. Also, when pouring boiled water or hot water that has been sterilized by boiling and cooled into the container 1, the temperature switch 7 can continue to keep the water warm without resetting the temperature switch 6. Changeover switch 8
If you pour cold water into the container 1 while the temperature is on the b-b' side, or if you want to redo boiling sterilization because the temperature was kept at 50 to 55°C for a long time, reset the operating lever 10 to return the temperature switch 6. Heater 2
energize. The temperature at the bottom of container 1 is approximately
When the temperature reaches 100°C, the temperature switch 6 turns off and cuts off the power supply to the heater 2.The temperature switch 6 remains in that state unless it is reset, and from then on, the heater 3 is controlled by the on/off control of the temperature switch 7.
maintained at 50-55°C.

In the above manner, changeover switch 8 is set to a-
If it is set to the a' side, it becomes a pot that makes conventional hot water and keeps it warm, and if the changeover switch 8 is set to the b-b' side, it becomes a pot that makes hot water suitable for dissolving powdered milk after sterilizing it by boiling and keeps it warm. be able to. Moreover, if the changeover switch 8 is on the b-b' side, even after the temperature has changed to the keep-warm state, if necessary, you can reset the temperature switch 6 with the operation lever 10 and the water will be heated to boiling water and then heated to 55 to 55℃. It is possible to perform operations to maintain the heat retention state.

Of course, the present invention is not limited to the embodiments, and in particular, the heat retention temperature can be set arbitrarily by selecting a temperature switch.

As is clear from the above explanation, according to the present invention, one heating pot can be used by setting the heating temperature for boiling water or hot water suitable for dissolving powdered milk, so that the heating temperature can be set to suit those who prefer it. If set, it is possible to provide an economical and convenient electric heat-retaining pot that can appropriately boil water even when in a heat-retaining state.

[Brief explanation of the drawing]

Fig. 1 is a cutaway view of essential parts showing an embodiment of the invention, Fig. 2 is an electric circuit diagram, Fig. 3 is a sectional view showing an example of a manual reset type temperature switch used in the invention, and Fig. 4. 2 is a front view of the operating lever portion in FIG. 1. FIG. 1... Inner container, 2... Temperature increasing heater, 3... Heat retention heater, 4, 6, 7... Temperature switch, 5...
Manual reset type temperature switch, 61... Operating rod, 62
... Contact, 63 ... Temperature-sensitive magnetic material, 64 ... Permanent magnet, 8 ... Changeover switch, 9 ... Connection rod, 10
...Operation lever.

Claims (1)

[Scope of utility model registration request] Heaters for increasing temperature, heaters for keeping warm, and temperature
It turns off when T ₁ or more, and the temperature T ₂ (however, T ₁ > T ₂ )
A temperature switch for high-temperature heating that turns on when the temperature drops to a temperature that is approximately equal to the above temperature T ₁ , a manual reset type temperature switch for moderate temperature heating that turns off when the temperature reaches approximately the same as the above temperature T ₁ , and a temperature switch that turns off when the temperature reaches approximately the same as the temperature T ₁ above. Temperature switch for high temperature insulation that turns on and off at _T2
a temperature switch for keeping the temperature at an appropriate temperature that is turned on and off in a lower temperature range; a first changeover switch for switching and connecting the temperature switch for high temperature heating and the temperature switch for heating to an appropriate temperature with respect to the temperature increasing heater; , a second changeover switch for switching and connecting the high temperature heat retention temperature switch and the appropriate temperature heat retention temperature switch to the heat retention heater, the first changeover switch and the second changeover switch; so that when the first changeover switch energizes the temperature increasing heater via the high temperature heating temperature switch, the second changeover switch operates the temperature keeping temperature switch through the high temperature keeping temperature switch. While the heater is energized, the first
When the temperature increase heater is energized via the appropriate temperature heating temperature switch with the changeover switch, the second
An electric heat-retaining pot characterized in that the changeover switch is configured to energize the heat-retaining heater via the temperature switch for keeping the temperature at an appropriate temperature.