Temperature control device

• US 9,629,205 B2
• Filed: 06/06/2014
• Issued: 04/18/2017
• Est. Priority Date: 12/22/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Tamura, Hikaru
• Primary Examiner(s): Wan, Quang
• Application Number:
  US14/297,887
• Publication Number:
  US 20140284324A1
• Time in Patent Office: 1,047 Days
• Field of Search: 219710, 219711, 219712, 219713, 219714, 219702, 219715, 219716, 219756, 219762, 219620, 219621, 219622, 219627, 219635, 219660, 219667, 219432, 219433, 219434, 219435, 219436, 219386, 99DIG 14, 99451, 374149
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H05B 6/6402 Aspects relating to the microwave cavity
• CPC Class Codes: H05B 6/645 using temperature sensors
• CPC Class Codes: H05B 6/66 Circuits

Abstract

A temperature control device which can control the temperature of an object to be processed even after supply of radio waves or electromagnetic waves from a high-frequency heating apparatus is stopped. The temperature control device includes a temperature sensor detecting the temperature of the object to be processed heated by radio waves generated from the high-frequency heating apparatus, a signal processing circuit comparing the temperature detected by the temperature sensor with a standard temperature, a rechargeable battery charged by electric energy generated by reception of the radio waves by an antenna, a charging circuit controlling charging of the rechargeable battery, and a heater supplied with electric power from the rechargeable battery to heat the object to be processed so that the temperature thereof gets closer to the standard temperature, in accordance with a comparison result by the signal processing circuit.

Claims

1. A temperature control device comprising:

a temperature sensor configured to detect a temperature of an object heated by a radio wave;

a signal processing circuit configured to compare the temperature of the object with a standard temperature;

an antenna configured to generate electric energy by reception of the radio wave;

a rechargeable battery charged by the electric energy;

a charging circuit configured to control charging of the rechargeable battery;

a heater configured to heat the object in accordance with a comparison result by the signal processing circuit;

a first protective material covering the signal processing circuit, the rechargeable battery, and the charging circuit; and

a second protective material covering the first protective material, the temperature sensor, the heater, and the antenna,

wherein the second protective material transmits the radio wave more than the first protective material,

wherein the temperature sensor is configured to detect a temperature of the heater, and

wherein the heater is controlled by the signal processing circuit in accordance with the temperature of the heater.

2. The temperature control device according to claim 1, wherein the first protective material comprises at least one selected from the group consisting of a carbon material, a ferrite material, and a carbonyl iron material mixed into a synthetic rubber.

3. The temperature control device according to claim 1, wherein the second protective material comprises at least one selected from the group consisting of a carbon material, a ferrite material, and a carbonyl iron material mixed into an urethane.

4. The temperature control device according to claim 1, wherein the second protective material comprises one of a synthetic resin and ceramic.

5. The temperature control device according to claim 1, wherein a thickness of a first layer formed of the first protective material is thicker than a thickness of a second layer formed of the second protective material.

6. The temperature control device according to claim 1, wherein the first protective material comprises a radio wave absorption material.

7. The temperature control device according to claim 1, further comprising a filler between the first protective material and the second protective material.

8. The temperature control device according to claim 1, wherein the radio wave is generated from a high-frequency heating apparatus.

9. A temperature control device comprising:

a temperature sensor configured to detect a temperature of an object heated by a radio wave;

a signal processing circuit configured to compare the temperature of the object with a standard temperature;

an antenna configured to generate electric energy by reception of the radio wave;

a rechargeable battery charged by the electric energy;

a charging circuit configured to control charging of the rechargeable battery;

a heater configured to heat the object in accordance with a comparison result by the signal processing circuit;

a first protective material covering the signal processing circuit, the rechargeable battery, the charging circuit, the temperature sensor, and the heater; and

a second protective material covering the first protective material and the antenna,

wherein the second protective material transmits the radio wave more than the first protective material,

wherein the temperature sensor is configured to detect a temperature of the heater, and

wherein the heater is controlled by the signal processing circuit in accordance with the temperature of the heater.

10. The temperature control device according to claim 9, wherein the first protective material comprises at least one selected from the group consisting of a carbon material, a ferrite material, and a carbonyl iron material mixed into a synthetic rubber.

11. The temperature control device according to claim 9, wherein the second protective material comprises at least one selected from the group consisting of a carbon material, a ferrite material, and a carbonyl iron material mixed into an urethane.

12. The temperature control device according to claim 9, wherein the second protective material comprises one of a synthetic resin and ceramic.

13. The temperature control device according to claim 9, wherein a thickness of a first layer formed of the first protective material is thicker than a thickness of a second layer formed of the second protective material.

14. The temperature control device according to claim 9, wherein the first protective material comprises a radio wave absorption material.

15. The temperature control device according to claim 9, further comprising a filler between the first protective material and the second protective material.

16. The temperature control device according to claim 9, wherein the radio wave is generated from a high-frequency heating apparatus.