Electric pot having improved relay installation position

Patent metadata

Field	Value
Publication number	US-11311136-B2
Application number	US-201916704178-A
Country	US
Kind code	B2
Filing date	Dec 5, 2019
Priority date	Dec 14, 2018
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

An electric pot may have an improved relay installation position. The electric pot may include a supporter and a pot main body provided with a heater driven to provide heat through an electric connection with connection terminals. The supporter may include a relay part that optionally switches between a connection of the power supply to a third connection terminal and a disconnection of the power supply to the third connection terminal.

First claim

What is claimed is:

1. An electric pot, comprising:
a supporter that includes a first power module provided at an upper end of the supporter and configured to receive electrical power from a power supply, the first power module includes first to fourth connection terminals;
a pot main body that is detachably coupled to the upper end of the supporter, and the pot main body includes:
a second power module including fifth to seventh connection terminals, and the second power module configured to receive electrical power from the first power module through the fifth connection terminal while being electrically connected with the first connection terminal, and
a heater to provide heat based on an electrical connection with the third and fourth connection terminals; and
a controller to receive electrical power from the pot main body,

wherein the supporter includes:
a relay circuit that selectively switches between a connection of the power supply to the third connection terminal and a disconnection of the power supply to the third connection terminal based on the second connection terminal being electrically connected with the sixth connection terminal,
a buck converter that receives alternating current power from the power supply and that converts magnitude of a voltage of the received alternating current power, and
a first voltage regulator that controls magnitude of a voltage from the buck converter to a predetermined first voltage, and
wherein the first voltage regulator and the seventh connection terminal are commonly connected to a first ground.

2. The electric pot of claim 1 , wherein the pot main body includes:
an insulation-type switched mode power supply (SMPS) that is connected to the fifth connection terminal and that rectifies electrical power supplied to the second power module,
a second voltage regulator that controls magnitude of a voltage of electrical power rectified by the insulation-type SMPS to a predetermined second voltage, and the second voltage regulator is connected to a second ground that is different from the first ground,
a switch that selectively changes between a first state and a second state based on a signal from the controller, and a part of the switch is connected to the second ground, and
a photocoupler that controls an electrical connection between the sixth connection terminal and the first ground based on the first state of the switch.

3. The electric pot of claim 2 , wherein when the controller controls the switch to be in the first state and the first power module is electrically connected to the second power module, the photocoupler is to electrically connect the sixth connection terminal and the first ground, and
wherein when the controller controls the switch to be in the second state and the first power module is electrically connected to the second power module, the photocoupler is to prevent an electrical connection between the sixth connection terminal and the first ground.

4. The electric pot of claim 3 , wherein when the photocoupler is to electrically connect the sixth connection terminal and the first ground, the relay circuit is to provide the connection of the power supply and the third connection terminal, and
when the photocoupler is to prevent the electrical connection between the sixth connection terminal and the first ground, the relay circuit is to provide the disconnection of the power supply to the third connection terminal.

5. The electric pot of claim 2 , wherein the photocoupler includes a light-emitting element connected to the switch, and a light-receiving element connected between the sixth connection terminal and the first ground.

6. The electric pot of claim 5 , wherein the light-emitting element and the light-receiving element are electrically insulated from each other, the light-emitting element is to transmit a light-receiving-element-control signal to the light-receiving element based on the first state of the switch, and the light-receiving-element-control signal is to be transmitted from the light-emitting element to the light-receiving element using light as a medium.

7. The electric pot of claim 2 , wherein the switch includes a collector and an emitter, the collector is connected to the photocoupler, and the emitter is connected to the second ground.

8. The electric pot of claim 2 , wherein when the first power module is electrically connected to the second power module, the first voltage regulator is to provide alternating current power to the fifth connection terminal through the first connection terminal, and the insulation-type SMPS is to rectify the alternating current power provided to the fifth connection terminal into direct current power.

9. The electric pot of claim 2 , wherein the second voltage regulator is to provide a voltage to the controller, and the controller is to operate based on the voltage received from the second voltage regulator.

10. The electric pot of claim 2 , wherein a voltage value of the predetermined first voltage is greater than a voltage value of the predetermined second voltage.

11. The electric pot of claim 2 , wherein the relay circuit, the buck converter, and the first voltage regulator are mounted on a first printed circuit board provided on the supporter, and
the insulation-type SMPS, the second voltage regulator, the switch and the photocoupler are mounted on a second printed circuit board provided on the pot main body.

12. The electric pot of claim 1 , wherein the pot main body includes:
a switched mode power supply (SMPS) that is connected to the fifth connection terminal and that rectifies electrical power provided to the second power module,
a second voltage regulator that controls magnitude of a voltage of electrical power rectified by the SMPS to a predetermined second voltage, and
a switch to selectively change between a first state and a second state, the switch in the first state is to connect the sixth connection terminal and the first ground based on a signal from the controller, wherein the second voltage regulator is to provide a voltage to the controller, the controller is to operate based on a voltage received from the second voltage regulator, and the controller is to control the switch.

13. The electric pot of claim 12 , wherein when the controller controls the switch to be in the first state and the first power module is electrically connected to the second power module, the relay circuit is to provide the connection of the power supply to the third connection terminal, and
when the controller controls the switch to be in the second state and the first power module is electrically connected to the second power module, the relay circuit is to provide the disconnection of the power supply to the third connection terminal.

14. The electric pot of claim 12 , wherein the switch includes a collector and an emitter, the collector is connected to the sixth connection terminal, and the emitter is connected to the first ground.

15. The electric pot of claim 12 , wherein when the first power module is electrically connected to the second power module, the first voltage regulator is to provide alternating current power to the fifth connection terminal through the first connection terminal, and the SMPS is to rectify the alternating current power provided to the fifth connection terminal into direct current power.

16. The electric pot of claim 12 , wherein a voltage value of the predetermined first voltage is greater than a voltage value of the predetermined second voltage.

17. The electric pot of claim 12 , wherein the relay circuit, th

Assignees

• Lg Electronics Inc

Inventors

• Jang Ho Yong
• Kim Donghyun
• Yoon Sehwa

Classifications

• H05K1/181

  associated with surface mounted components · CPC title

• H02M3/24

  by static converters · CPC title

• Y10S220/912

  Cookware, i.e. pots and pans · CPC title

• A47J27/2105 Primary

  of the cordless type, i.e. whereby the water vessel can be plugged into an electrically-powered base element · CPC title

• A47J27/21058

  Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water (A47J27/21158 takes precedence) · CPC title