JPS637152Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention is equipped with a heating device for electric pots and various other liquid containers, especially a water heater and a warming heater, so that boiling water is performed by a high heat source and keeping warm is performed by a low heat source. It relates to a heating device.

Conventional technology Conventionally, water heaters and heat-retaining heaters are wound around a belt-shaped core body in the length direction like a two-thread screw, and wrapped around the side of a container with this core body wrapped inside a belt-shaped holder. ing. Therefore, even if the wrapping position of the heater is set to the lowest position on the side circumference of the container, the water heater, although it is a high heat source, has a height of approximately 40 mm from the lowest edge of the side circumference of the container, similar to the low heat source heater. It reaches up to the top. On the other hand, the maximum amount of decrease in the content liquid reaches the lower end of the liquid lift pipe even when the liquid is only poured out by the pump, and the liquid level becomes lower than the uppermost part of the heater wrapping part. If we consider evaporation and loss when the residual liquid continues to be heated, the liquid level will further decrease. The area where the heater wraps, which is above the liquid level, reaches above the liquid level in the container, resulting in dry cooking.When the water heater, which is used as a high heat source, is activated, the container, seal packing, and other incidental materials may become discolored or cause deterioration.

Purpose This invention is to create a liquid container that can eliminate the above-mentioned drawbacks of the conventional method by wrapping the water heater and the heat-retaining heater separately, thereby making the mounting position of the water heater for high heat source sufficiently low on the container. The object of the present invention is to provide a heating device.

Structure/Function Therefore, this invention is characterized in that a water heater is attached to the lowest part of the side surface of the container, and a heat-retaining heater is attached above the water heater at a height corresponding to the inner end of the pouring path.

A thin metal wire is used for the heater, which is wrapped around a belt-shaped core, but since the water heater and the warming heater are separate units that are individually attached to the outside of the container, each heater has its own core. On the other hand, the pitch is at least half that of the conventional alternate winding of both heaters, and the necessary capacity can be obtained even if the width of the winding core is reduced to about half.

Therefore, at least the vertical dimension of the water heater can be reduced.

In addition, the water heater can be installed at the lowest part of the side of the container, and the critical liquid level at which the container starts to dry is lowered to a position below the same liquid level as the inner end height of the spouting channel. To prevent the hot water heater, which is a high heat source, from boiling the water dry, and to make it easier to heat the entire water by causing active convection in the liquid inside. on the other hand,
The heat retention heater is installed at the top of the water heater and at a height corresponding to the bottom of the inner end of the spouting channel.
It is possible to keep the temperature of the area from which the liquid content is poured out by pumping with top priority.

Embodiment To explain the first embodiment shown in FIGS. 1 to 4, a liquid container 1 has an inner container 2 made of a metal with good thermal conductivity such as aluminum, and an outer container made of metal such as stainless steel or iron plate. It is covered with a case 3, and a water heater 4 is installed at the bottom of the side circumference of the inner container 2.
Further, a heat-retaining heater 5 is wrapped around the upper part of each of the heat-retaining heaters 5. A synthetic resin dish-shaped shoulder member 6 is attached to the upper end of the outer case 3, and the mouth of the inner container 2 is connected to the bottom opening of the shoulder member 6 through a seal packing 7. At the rear of the shoulder member 6, a lid body 8 made of synthetic resin that covers the upper part of the shoulder member 6 is pivotally supported by a shaft 9 so as to be openable and closable. The lid body 8 has a built-in bellows pump 11 for pouring out the liquid content, which is pressed by a pressing plate 10 exposed on the top surface of the lid body 8 .

At the mouth of the inner container 2, there is an air supply path 12 that guides compressed air from the pump 11 into the inner container 2, and an air supply path 12 that guides the liquid content that is about to be pushed out by the air supplied into the inner container 2 to the outside. An inner lid 14 having a pouring passage 13 is detachably attached. The air supply path 12 and the outlet path 13 are formed and attached to a synthetic resin head 16 fixed to the upper center surface of the metal inner lid 14. The spouting passage 13 is formed by communicating within the head 16 a liquid lift pipe 13a hanging down inside the inner container 2 and a spouting pipe 13b projecting from the head 16 to one side of the upper part of the container 1. The liquid to be poured out is made to flow into a telescopic low spout guide section 17 provided therein. 18 is a locking member that keeps the lid 8 closed.

At the front of the inner container 2, connect the upper and lower ends 1
9, 20 liquid level pipes 21 are installed vertically, and the lower connection 2
The heat retaining heater 5 and the kettle heater 4 are located above and below the 0 section. Each of the heaters 4 and 5 is wound around separate strip-shaped cores 22 and 23, respectively, and is further held in separate strip-shaped holders 24 and 25 via an insulating plate, and is wound around the outer periphery of the inner container 2. . The heaters 4 and 5 are wound by wrapping the band-shaped holders 24 and 25 around the outer periphery of the inner container 2, and fastening the respective end tabs 24a and 25a together with one or several screws 26. There is.

A thermostat 27 for temperature control, a temperature-sensitive reed switch 28, a temperature fuse 29 for safety, and a timer 30 that starts energization at an arbitrary set time are arranged in the space between the bottoms of the inner container 2 and the outer case 3. The electrical elements are connected as shown in FIG.

The liquid level pipe 2 is attached to the synthetic resin base 17a of the low spout guide section 17 attached to the front surface of the exterior case 3.
a transparent window 31 that allows 1 to be observed from the outside;
Pilot lamp display windows 32, 33, and 34 are provided to display the operation of the timer 30, as well as the boiling state and the keeping-warm state, respectively, and an operation knob 30a of the timer 30 is arranged next to the timer operation display window 32. In the circuit of FIG. 4, numerals 35, 36, and 37 are pilot lamps for the above-mentioned display. A magnetic power supply connecting portion 38 is provided at the rear and lateral position of the exterior case 3, so that a magnetic plug 40 of a power cord 39 can be electromagnetically connected. 41
Reference numeral 42 indicates an outer case bottom plate mounting bracket attached to the lower surface of the bottom of the inner container 2 by spot welding, etc., 43 indicates an auxiliary metal fitting, and 43 screws 44 to the auxiliary metal fitting 42 to attract the outer case bottom plate 45 to the lower end of the outer case 3. This is the bottom cover plate that stabilizes it.

The timer 30 is used to set, for example, the time to start energization, and the timer 30 is used to set the time when the energization starts.
is connected to the NO terminal side so that the heater circuit can be energized, while the switch 46 is connected to the NO terminal side while the switch 46 is not returned to the time-up position, so that the own stepping motor 47 and operation indicator lamp 35 can be energized. Do it like this.

When the heater circuit is energized, the thermostat 27 is in the ON state as shown in FIG. 4 while the content liquid 48 is below the set temperature, and short-circuits the heat retention heater 5 and the heat retention display pilot lamp 37. Therefore, the water heater 4 and the water boiling display pilot lamp 36 are energized, and the water is boiled using a high heat source and the lamp is displayed.

When the content liquid 48 reaches the set temperature, the thermostat 27 is turned off, and the insulating heater 5 and lamp 3 are turned off.
Release the short-circuit condition of 7. For this reason, both the water boiling heater 4 and the heat retention heater 5 in series are energized, and the heater resistance increases so that both heaters 4 and 5 are in a low heat generation state, and the temperature can be maintained within the set temperature range by the temperature sensitive reed switch 28. It will be done. At this time, both lamps 36 and 37 are lit to indicate the heat retention state.

When the content liquid 48 becomes lower than the set temperature again, the thermostat 27 is turned on, and the state returns to the water boiling state using the water heater 4.

Even when the maximum content liquid 48 is poured out by the pump 11 and the liquid level drops to the position shown in FIG. 4. An empty cooking condition for the inner container 2 due to the upper part does not occur.

Even if the content liquid 48 is pumped out all at once to the liquid level shown in FIG. 1, the drop in the liquid level can usually be observed externally through the window 31 and the liquid level tube 21, so the content liquid 48 cannot be replenished. However, in the unlikely event that you do not notice the drop in the liquid level immediately or forget to replenish it temporarily, and the liquid content 48 evaporates and the liquid level falls further, the liquid level by the height h will decrease. It takes a considerable amount of time for this to occur, and in most cases, by then a drop in the liquid level has been confirmed and the content liquid has been replenished.

In the second embodiment shown in FIG. 5, a thermostat 27 is used as a switch for switching between the water boiling heater 4 and the warming heater 5, so that one of the heaters is exclusively used for boiling water and keeping the water warm. In this case, it is suitable when it is not desirable for the water heater 4 located at the lowest position of the container to also be used as a heat source for keeping the contents uniformly warm.

In addition, the water boiling heater 4 and the heat retention heater 5 are as follows.
As shown in FIG. 6, it can also be held in one holder 51 and attached to the side of the container, in which case the effort required to attach the heater is halved.

Effects According to this invention, a water heater is installed at the lowest part of the side of the container, and a heat-retaining heater is installed above it at a height corresponding to the inner end of the spouting path, making it possible to reduce the vertical dimension. The water heater can be installed at the lowest part of the side of the container, and the critical liquid level at which the container starts to become empty can be lowered to a position below the same liquid level as the height of the inner end of the spouting channel. In addition to making it difficult for the hot water heater, which is a high heat source, to cause dry cooking, by causing active convection in the liquid content, it is easier to heat the water to the entire amount, and as a result, efficient heating can be achieved. can.

On the other hand, the heat retention heater is installed at the upper part of the water heater and at a height corresponding to the lower inner end of the spouting channel, so the area where the liquid content is poured out by the pump can be kept warm with top priority. It is possible to obtain a poured content liquid at a predetermined temperature no matter when the liquid is poured until it reaches a liquid level that can be poured.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of an electric pot showing the first embodiment, Fig. 2 is a front view with some parts removed, Fig. 3 is a cross-sectional bottom view, Fig. 4 is an electric circuit diagram, and Fig. 5 is a schematic diagram of the electrical pot. FIG. 6 is an electric circuit diagram showing two embodiments; FIG. 6 is a partial sectional view of the third embodiment; 2... Inner container, 4... Water heater, 5... Heat retention heater, 22, 23... Band-shaped core, 24, 25
...Band-shaped holder, 3...Exterior case.

Claims (1)

[Scope of claim for utility model registration] (1) A water heater is attached to the lowest part of the side of the container,
1. A device for heating the content of a liquid container, characterized in that a heat-retaining heater is attached to the upper portion thereof and at a height corresponding to the inner end of the pouring path. (2) The device for heating the contents of a liquid container according to claim 1, wherein the water heater is attached to the lowermost end of the periphery of the container. (3) The device for heating the contents of a liquid container according to claim 1, wherein the container to which the heater is attached is an inner container housed in an outer case.