JPS6342477Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a plug-in thermostat for use in electric hot plates, etc., which has two heaters on the heating plate. Conventional electric hot plates, for example, are used because food can be easily cooked on the tabletop, and cleaning after use can be easily done by removing the plug-in thermostat.
The cooking surface is uniformly heated regardless of the amount of food to be cooked, and since the heater is not located over the entire heating plate, the temperature directly above the heater is higher than other parts. For this reason, two heaters are installed in order to equalize the temperature distribution on the cooking surface, but as mentioned above, even when the amount of food to be cooked is small, the two heaters are electrically heated and some parts of the heater radiate heat unnecessarily. The drawback is that it wastes power. The present invention has been devised to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a plug-in thermostat that can arbitrarily change the temperature suitable for the amount of food to be cooked, partial heating, and temperature keeping. An embodiment of the present invention will be described below with reference to the drawings. The configuration of the embodiment is as shown in FIGS. 1 and 2,
Reference numeral 1 denotes a heating plate to which two heaters, an inner heater 6 and an outer heater 6, are attached by brazing or casting. 3 is a cover 5 that covers the side of the heating plate 1 with a plug-in thermostat.
It is installed on the outside of the heater 6, and constitutes a connecting part between the terminals of the two heaters 6, 6 and a plug-in thermostat 2, which will be described later. Reference numeral 4 denotes a handle that also serves as a leg, and is provided opposite to the side surface of the cover 5. Reference numeral 2 denotes a plug-in thermostat which is inserted into the plug-in thermostat receiver 3 and connected to the two heaters 6, 6 to control the energization.A thermosensitive rod 7 for detecting the temperature of the heating plate 1 is protruded from the outside, and the opposing part A power cord 10 is provided on the top, and a temperature control knob 8 and a switching knob 9 are provided on the top surface. This plug-in thermo 2 has a second
The circuit is constructed and provided as shown in the figure. The heating plate 1 shown by the chain line has an inner heater 6 and an outer heater 6, and the plug-in thermometer 2 has one end of the single-pole switch 12 on the power supply side, its contact 11, and the connection part 1.
7. A series circuit connected to the power supply side in the order of the outer heater 6, the contact 14 of the bipolar switch 13 and the switch 16 thermally responsive to its common terminal through the connection 18, and the power supply side of the unipolar switch 12 of the series circuit. A parallel circuit is formed in which the inner heater 6 is connected to the contact 14 side via the connection part 19, and a circuit is also provided to connect the contact 11 side of the unipolar switch 12 and the other contact 15 of the bipolar switch 13. be. The operation of this embodiment is to connect the power cord 10 of the plug-in thermostat 2 to the power source, insert the plug-in thermostat 2 into the plug-in thermostat receiver 3, and connect the desired heating plate 1,
The set temperature is set using the temperature control knob 8 and the power is turned on. Further, the switching knob 9 is used to operate a single pole switch 12 and a bipolar switch 13 having contacts 14 and 15 to switch the electric power of the inner and outer heaters 6, 6, and the operation thereof is as shown in the table below.

[Table] In the operation shown in the above table, the inner and outer heaters 6 and 6 are connected in parallel and energized, so the temperature of the heating plate 1 is heated more uniformly. The temperature inside is high and can create a temperature difference towards the outside. In operation, by connecting the inner and outer heaters 6, 6 in series, the current conductivity is reduced and the heating plate 1 can be brought to a temperature suitable for keeping warm. In operation, the inner and outer heaters 6, 6 are not energized. The switch 16 detects the abnormally high temperature of the heating plate 1 by plugging it into the thermosensitive rod 7 for temperature detection of the thermometer 2.
A switch 16 that detects the heat and responds to heat shuts off the power. According to the present invention, in a plug-in thermostat that can be freely inserted into a heating plate having two heaters, one end of a single-pole switch and its contact, the heater,
A series circuit connected to the power supply side in the order of the contacts of the bipolar switch and the switch that responds thermally to its common terminal, and a parallel circuit connected to the power supply side of the unipolar switch of the series circuit, another heater, and the contact side of the bipolar switch. In addition, by providing a circuit that connects the contact side of the single-pole switch and the other contact of the bipolar switch, it is possible to arbitrarily switch the energization to the two heaters of the heating plate using those circuits of the plug-in thermometer. It has the effect of allowing you to arbitrarily select a temperature that suits the amount of food to be cooked, a temperature that is suitable for partial heating, and a temperature that is suitable for keeping warm.It is also energy saving, highly safe, and easy to use.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a plug-in thermostat and an electric hot plate showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram of the plug-in thermostat. 1...Heating plate, 2...Plug-in thermo, 6,
6... Heater, 11... Contact, 12... Single pole switch, 13... Bipolar switch, 14... Contact,
15...Other contacts.

Claims (1)

[Scope of utility model registration request] In the plug-in thermostat 2, which can be inserted into the heating plate 1 having two heaters 6, 6, the contact 11 of the single-pole switch 12, the contact 14 of the heater 6, the double-pole switch 13, and their common terminal are connected to both ends of the power supply. The series circuit to be connected and the single pole switch 12 of the series circuit
A parallel circuit is formed by connecting the power supply side of the heater 6 to the contact 14 side of the bipolar switch 13, and a circuit connecting the contact 11 side of the unipolar switch 12 to the other contact 15 of the bipolar switch 13 is provided. , A plug-in thermostat characterized in that the circuits of the plug-in thermostat 2 can arbitrarily switch the supply of electricity to the two heaters 6, 6 of the heating plate 1.