JPS631951Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] The present invention relates to improvements in electric pots.

[Technical background of the invention and its problems]

Conventional electric warming pots heat the supplied water, and when the water reaches a specified temperature, they stop heating and switch to a warming mode to keep the water warm.
A water level gauge is provided to inform users of the amount of hot water remaining in the pot. This water level gauge is connected to the inside of the pot and indicates the water level inside the pot.

However, with conventional water level gauges, it is difficult to see the water level, and the amount of hot water remaining cannot be confirmed unless you look carefully. For this reason, there was a risk that the water boiling operation would be performed without checking the amount of remaining hot water. Therefore, it is desirable to be notified of the need for water supply when the amount of remaining hot water is low.

[Purpose of invention]

This invention was made based on the above circumstances,
The purpose is to provide an electric pot that can notify you of water supply when the amount of hot water remaining is low and water supply is required.

[Summary of the idea]

In this invention, when the amount of remaining hot water decreases to a predetermined amount, the hot water amount reduction detector installed in the pot detects that the ambient temperature has fallen below the temperature of the hot water, and operates to detect a decrease in hot water amount, and responds to this operation. This electric pot uses a water supply alarm to notify the user of water supply.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a sectional view of an electric pot according to the present invention. In Figure 1, 1
is the exterior case for the electric pot, 2 is the hot water tap button 3
4 is a handle, and 5 is a spout.
Furthermore, a heat insulating container 6 is inserted inside the case 1. Furthermore, on the outer peripheral surface of this heat insulating container 6,
A water heater H1 with a relatively large calorific value, e.g. 670W, and a relatively small calorific value, e.g. 50W.
A heat-retaining heater H2 is provided in contact with the heat-retaining heater H2.
Note that these heaters H1 and H2 are connected in parallel as will be described later, and are provided in the heat insulating container 6 covered with an insulating material. This electric kettle is configured such that when the hot water tap button 3 is pressed with an appropriate pressure, the water (hot water) stored in the heat insulating container 6 flows out from the tap hole 5 through the hot water outlet pipe 7.

Now, the heat-retaining container 6 is provided with a water boiling thermoswitch S1, a heat-retaining thermoswitch S2, and a thermoswitch S3 for detecting a decrease in the amount of hot water on its side and bottom surfaces. The thermometer S1 for boiling water is turned off when the water temperature in the heat insulating container 6 reaches the boiling set temperature, and its on temperature is set to, for example, a low temperature that is not heated (the temperature of the water that has just been supplied). . The heat-retaining thermometer S2 is turned on when the temperature is below the lower limit of the heat-retaining temperature, which has a certain range set to a lower value than the set temperature of the water boiler, and is turned off when the temperature is higher than the upper limit. In addition, these water boiling thermos S
1 and the heat-retaining thermometer S2 may be installed on the bottom surface of the heat-retaining container 6 and on the side surface of the heat-retaining container 6 above the position where the water boiling heater H1 and the heat-retaining heater H2 are provided.

The thermometer S3 for detecting a decrease in the quantity of hot water is turned off at a temperature slightly lower than the water boiling set temperature and higher than the upper limit of the heat retention temperature, and turned on at a temperature slightly lower than the lower limit of the heat retention temperature. This Thermo S3 is used when the amount of remaining hot water decreases and water supply becomes necessary (for example, 0.8~
It is provided on the outer surface of the heat-insulating container 6 at a position corresponding to the water level of 0.3).

Furthermore, a water boiling indicator lamp L1, a heat retention indicator lamp L2, and a water supply alarm indicator lamp L3 are provided at the bottom of the case 1.

FIG. 2 is a circuit diagram of the water supply notification circuit in this pot. A series circuit of a thermometer S1 for boiling water and a heater H1 for boiling water is connected to the AC power supply e via a temperature fuse F. The thermometer S1 for boiling water has a resistor R1 and a heat retention indicator lamp L2.
The series circuits are connected in parallel. Further, a series circuit including a water boiling indicator lamp L1 and a resistor R2 is connected in parallel to the water boiling heater H1. Further, a series circuit of a heat-retaining thermostat S2 and a heat-retaining heater H2 is connected to the AC power supply e.

Now, a series circuit consisting of a thermometer S3 for detecting a decrease in the amount of hot water, a resistor R3, and a water supply alarm indicator lamp L3 is connected to the thermometer S1 for boiling water.

Next, the operation of the pot configured as described above will be explained. Open the lid 2 and pour water into the heat-insulating container 6 until the water level becomes as shown in FIG. Then, when you close the lid 2 and turn on the power e,
A current flows through the water supply notification circuit as shown in FIG. Here, the water boiling thermometer S1 is in a closed state (ON) because the temperature of the water contained in the heat insulating container 6 is low. Therefore, a current i1 flows through the water boiling thermometer S1 and the water boiling indicator lamp L1, so that the water boiling indicator lamp L1 lights up, and a current i2 flows through the water boiling thermometer S1 and the water boiling heater H1, so that the water boiling heater H1 generates heat. Further, since the heat-retaining thermometer S2 is in the ON state, a current i3 flows through the heat-retaining thermometer S2 to the heat-retaining heater H2, causing the heat-retaining heater H2 to generate heat. Note that since the internal resistances R1 to R3 of each lamp L1 to L3 are larger than the resistance value of each heater H1 and H2, no current flows through the lamps L2 and L3. In this way, the water in the heat insulating container 6 is heated and its temperature increases. When the water temperature reaches the set water boiling temperature, the water boiling thermometer S1 is turned off as shown in FIG. In addition, Thermo S for heat retention
2 is turned off at the upper limit of the heat retention temperature before the water boiler reaches the set temperature. Thermo S3 for detecting decrease in hot water amount
is turned off at a temperature slightly lower than the water boiling set temperature at which the water heating thermometer S1 is turned off. Therefore, when the water temperature becomes equal to or higher than the set water boiling temperature, a current i4 flows through the water supply notification circuit as shown in FIG. 4. Note that this current i4 is a small current because the resistance value R2 of the heat retention indicator lamp L2 is large, and the water heater H1 does not generate heat. Then, the heat retention indicator lamp L2 lights up to indicate the heat retention operation. Then, when the water temperature decreases and becomes below the lower limit of the heat retention temperature, the heat retention thermometer S2 is turned on and power is supplied to the heat retention heater H2 to perform heat retention.
As a result, when the water temperature reaches the upper limit value of the heat retention temperature, the heat retention thermometer S2 is turned off and the power supply to the heat retention heater H2 is stopped. In this way, the water temperature in the pot is maintained at the warm temperature by performing the heat retention operation.

Now, when the user presses the hot water tap button 3 to let the hot water heated and kept warm as described above flow out from the hot water tap 5 and use it for a desired purpose, the water level will drop. Then, when this water level becomes lower than the position where the thermometer S3 for detecting a decrease in the amount of hot water is provided, the ambient temperature of the thermometer S3 for detecting a decrease in the amount of hot water becomes lower than the lower limit of the heat retention temperature. As a result, the thermometer S3 for detecting a decrease in the amount of hot water is turned on. Therefore, when the amount of hot water falls below a predetermined amount, a current i5 flows through the water supply alarm circuit, the thermometer S3 for detecting a decrease in the amount of hot water, and the water supply alarm display lamp L3, as shown in FIG. As a result, a message is displayed indicating that the amount of hot water has decreased and water supply is required. Therefore, when water is supplied, the thermometer S3 for detecting a decrease in the amount of hot water is turned off, the water supply notification lamp L3 is turned off, and the water heater H1 and the heat retention heater H are turned off again.
2 generates heat and performs the action of boiling water.

In this way, in this circuit, when the amount of hot water in the heat insulating container 6 decreases to a predetermined amount of remaining hot water, the thermometer S3 for detecting a decrease in the amount of hot water turns on and lights up the water supply alarm indicator lamp L3, so that the amount of remaining hot water is reduced. It is possible to notify you when the water is running low and there is a need to supply water. Since this notification is made by lighting the water supply notification display lamp L3, the user can see the water supply notification at a glance.

In addition, a buzzer may be used instead of the water supply alarm display lamp L3, and the water supply alarm display lamp L3 may be replaced with a buzzer.
3 and a buzzer may be used together. Alternatively, the thermometer S3 for detecting a decrease in the amount of hot water may be used as a switching element, and in response to this switch, a microcomputer may digitally notify water supply, or a voice synthesis LSI may be used to notify water supply.

Note that it is better to install the water boiling thermometer S1 on the side of the pot rather than on the bottom, since its main function is to detect when the water temperature in the pot reaches the set water boiling temperature.

The heat-retaining thermometer S2 is preferably installed at the bottom of the pot rather than the side, since the amount of hot water remaining in the pot will at least perform the heat-retaining action.

Further, the thermometer S3 for detecting a decrease in the amount of hot water may be provided not only on the outer surface of the heat-retaining container 6 but also on the inner surface of the heat-retaining container 6 with a waterproof structure.

[Effect of idea]

According to the present invention, when the amount of remaining hot water decreases and the water level becomes lower than the installation position of the thermometer for detecting a decrease in the amount of hot water, the thermometer for detecting a decrease in the amount of hot water is turned on and the water supply alarm display lamp is lit. To provide an electric pot that can notify you of water supply when the amount of water becomes low and water supply becomes necessary.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the electric pot according to the present invention, Fig. 2 is a configuration diagram of a water supply alarm circuit in the pot of the present invention, and Figs. 3 to 5 are operation of the circuit shown in Fig. 2. FIG. S1... Thermoswitch for boiling water, S2... Thermoswitch for keeping warm, S3... Thermoswitch for detecting decrease in amount of water, L1... Water boiling indicator lamp, L2
...Warmth indicator lamp, L3...Water supply alarm indicator lamp, H1...Kettle heater, H2...Warmth heater.

Claims (1)

[Claims for Utility Model Registration] (1) A water heater with a relatively large calorific value that heats the water in the pot, and a water heater that detects the water temperature in the pot and turns on when the water temperature is low. A water boiling thermoswitch that starts energization and turns off when a desired water boiling temperature is reached to stop energization to the water heater, and a heat retention heater with a relatively small calorific value that heats the water in the pot to keep it warm. Then, the temperature of the water in the pot is detected, and when the water temperature is lower than the lower limit of the heat retention temperature, which has a certain range set to a lower value than the water boiling temperature, the water temperature is turned on to start energizing the heat retention heater, and when the water temperature is higher than the upper limit. A thermoswitch is provided at a height corresponding to a predetermined amount of hot water remaining in the pot, and the thermoswitch is installed at a height corresponding to a predetermined amount of hot water remaining in the pot, and the thermoswitch is installed at a height corresponding to a predetermined amount of hot water remaining in the pot. The system is comprised of a hot water amount reduction detector that detects a drop in hot water temperature when the water temperature drops and performs a hot water amount reduction detection operation, and a water supply alarm that performs a water supply alarm operation in response to the hot water amount reduction detection operation of the hot water amount reduction detector. An electric pot characterized by: (2) The electric pot according to claim 1, wherein the thermoswitch for boiling water is provided on the side of the pot. (3) The electric pot according to claim 1, wherein the heat-retaining thermoswitch is provided on the bottom of the pot. (4) An electric pot according to claim (1) of the utility model registration, which uses a thermoswitch as a hot water quantity reduction detector. (5) The hot water quantity reduction detector is provided in the side of the pot.Claim No. (1) of the utility model registration
Electric pot as described in section.