REFRIGERATOR

• US 20100236269A1
• Filed: 11/05/2008
• Published: 09/23/2010
• Est. Priority Date: 11/06/2007
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kamisako, Toyoshi, Tsujimoto, Kahoru, Ueda, Yoshihiro, Mamemoto, Tosiaki, Kakita, Kenichi, Adachi, Tadashi, Horii, Katsunori, Mori, Kiyoshi
• Application Number:
  US12/741,718
• Publication Number:
  US 20100236269A1
• Time in Patent Office: Days
• US Class Current: 62/331
• CPC Class Codes: A23B 7/0425 the material not being transported through or in the apparatus, with or without shaping, e.g. in the form of powder, granules or flakes A23B7/05 takes precedence
• CPC Class Codes: A23B 7/055 with direct contact between the food and the chemical, e.g. liquid nitrogen, at cryogenic temperature
• CPC Class Codes: A23B 7/144 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
• CPC Class Codes: A23L 3/364 with packages or with shaping in form of blocks or portions
• CPC Class Codes: A23L 3/375 with direct contact between the food and the chemical, e.g. liquid nitrogen, at cryogenic temperature
• CPC Class Codes: B05B 5/0255 spraying and depositing by electrostatic forces only
• CPC Class Codes: B05B 5/0533 Electrodes specially adapted therefor; Arrangements of electrodes
• CPC Class Codes: B05B 5/057 Arrangements for discharging liquids or other fluent material without using a gun or nozzle
• CPC Class Codes: B05B 7/0012 Apparatus for achieving spraying before discharge from the apparatus
• CPC Class Codes: F25D 17/042 Air treating means within refrigerated spaces air conditioning in general F24F
• CPC Class Codes: F25D 2317/0413 by humidification
• CPC Class Codes: F25D 2317/04131 Control means therefor
• CPC Class Codes: F25D 2600/02 Timing
• CPC Class Codes: F25D 2700/12 Sensors measuring the inside temperature
• CPC Class Codes: F25D 2700/14 Sensors measuring the temperature outside the refrigerator or freezer
• CPC Class Codes: F25D 29/00 Arrangement or mounting of control or safety devices

Abstract

A refrigerator that sprays a mist using an atomization apparatus includes an atomization state determination unit that determines an atomization state of an atomization unit. An operation of the atomization unit is controlled according to a signal determined by the atomization state determination unit. Thus, an appropriate amount of mist spray is performed according to the atomization state, so that improved spray accuracy can be attained.

Claims

1. A refrigerator comprising:

a heat-insulated storage compartment;

an atomization unit configured to spray a mist into said storage compartment;

an atomization state determination unit configured to determine an atomization state of said atomization unit; and

a control unit,

wherein said atomization unit is configured to finely divide water adhering to said atomization unit and spray the finely divided water into said storage compartment as the mist, and

said control unit is configured to control an operation of said atomization unit according to a signal determined by said atomization state determination unit.

2. The refrigerator according to claim 1,

wherein said atomization state determination unit is configured to determine that said atomization unit performs proper spray when a signal detected by said atomization state determination unit is in a specified range determined in advance, and determine that said atomization unit does not perform proper spray when the detected signal is not in the specified range.

3. The refrigerator according to claim 1,

wherein said atomization unit includes:

a voltage application unit configured to generate a potential difference; and

an output detection unit, and

said atomization state determination unit is configured to determine the atomization state of said atomization unit according to a signal of an applied current that is applied to said voltage application unit, the applied current being detected by said output detection unit.

4. The refrigerator according to claim 1,

wherein said atomization unit includes:

a voltage application unit configured to generate a potential difference; and

an output detection unit, and

said atomization state determination unit is configured to determine the atomization state of said atomization unit according to a signal of an applied voltage that is applied to said voltage application unit, the applied voltage being detected by said output detection unit.

5. The refrigerator according to claim 3,

wherein energization of said voltage application unit is stopped when said atomization state determination unit determines that said atomization unit does not perform proper spray.

6. The refrigerator according to claim 5,

wherein said atomization state determination unit is configured to determine the atomization state again, when at least a predetermined time has elapsed after said atomization state determination unit determines that said atomization unit does not perform proper spray.

7. The refrigerator according to claim 1, further comprising

a determination timing setting unit configured to set a timing at which said atomization state determination unit operates,

wherein said atomization state determination unit is configured to determine the atomization state of said atomization unit according to a signal from said determination timing setting unit, and

said control unit is configured to control the operation of said atomization unit according to a result of the determination by said atomization state determination unit.

8. The refrigerator according to claim 7,

wherein said determination timing setting unit is configured to set a determination timing at which said atomization state determination unit determines the atomization state of said atomization unit, when an environment in said storage compartment including said atomization unit is estimated to change.

9. The refrigerator according to claim 7,

wherein said determination timing setting unit is a damper that adjusts an amount of air to said heat-insulated storage compartment, and

said atomization state determination unit is configured to determine the atomization state of said atomization unit when said damper switches from open to closed or from closed to open.

10. The refrigerator according to claim 7,

wherein said determination timing setting unit is a compressor that cools said storage compartment, and

said atomization state determination unit is configured to determine the atomization state of said atomization unit when said compressor switches from on to off or from off to on.

11. The refrigerator according to claim 9, further comprising

an outside air temperature detection unit configured to detect an outside air temperature of a main body of said refrigerator,

wherein said determination timing setting unit is changed according to the outside air temperature detected by said outside air temperature detection unit.

12. The refrigerator according to claim 10, further comprising

an outside air temperature detection unit configured to detect an outside air temperature of a main body of said refrigerator,

wherein said determination timing setting unit is changed according to the outside air temperature detected by said outside air temperature detection unit.

13. The refrigerator according to claim 11,

wherein, when the outside air temperature detected by said outside air temperature detection unit is equal to or higher than a predetermined temperature, said atomization state determination unit is configured to determine the atomization state of said atomization unit at a determination timing set by said determination timing setting unit, the determination timing being a timing when said damper that adjusts the amount of air to said heat-insulated storage compartment switches from open to closed or from closed to open.

14. The refrigerator according to claim 12,

wherein, when the outside air temperature detected by said outside air temperature detection unit is equal to or lower than a predetermined temperature, said atomization state determination unit is configured to determine the atomization state of said atomization unit at a determination timing set by said determination timing setting unit, the determination timing being a timing when said compressor that cools said storage compartment switches from on to off or from off to on.

15. The refrigerator according to claim 1,

wherein said atomization unit is an electrostatic atomization apparatus that includes:

an atomization electrode for applying a voltage to water supplied to a nozzle tip; and

a counter electrode, and sprays a fine mist into said storage compartment,

said atomization state determination unit is an atomization amount determination unit configured to determine an atomization amount of the fine mist sprayed from said electrostatic atomization apparatus,

said refrigerator further comprises;

a voltage application unit configured to apply a high voltage between said atomization electrode and said counter electrode; and

a water supply unit configured to supply water to said electrostatic atomization apparatus, and

said control unit is configured to adjust the atomization amount of said electrostatic atomization apparatus according to a signal from said atomization amount determination unit.

16. The refrigerator according to claim 15,

wherein said atomization amount determination unit includes a discharge current detection unit configured to detect a current when said voltage application unit discharges, and

said control unit includes a control circuit that controls the voltage of said voltage application unit according to a signal detected by said discharge current detection unit.

17. The refrigerator according to claim 16,

wherein the voltage applied between said atomization electrode and said counter electrode by said voltage application unit is forcibly decreased when the current detected by said discharge current detection unit is higher than a first value that is an upper limit of a proper range.

18. The refrigerator according to claim 16,

wherein the voltage applied between said atomization electrode and said counter electrode by said voltage application unit is forcibly increased when the current detected by said discharge current detection unit is lower than a third value that is a lower limit of a proper range.

19. The refrigerator according to claim 15,

wherein said atomization amount determination unit includes a discharge current detection unit configured to detect a current when said voltage application unit discharges, and

said control unit includes a control circuit that controls an amount of water supplied by said water supply unit according to a signal detected by said discharge current detection unit.

20. The refrigerator according to claim 19,

wherein said water supply unit includes a water pump, and

said control circuit controls an amount of water conveyed by said water pump.

21. The refrigerator according to claim 19,

wherein said water supply unit includes an on-off valve that opens and closes a water flow path, and

said control circuit controls the opening and closing of said on-off valve.

22. The refrigerator according to claim 19,

wherein the amount of water supplied to said electrostatic atomization apparatus by said water supply unit is decreased when the current detected by said discharge current detection unit is higher than a first value that is an upper limit of a proper range.

23. The refrigerator according to claim 19,

wherein the amount of water supplied to said electrostatic atomization apparatus by said water supply unit is increased when the current detected by said discharge current detection unit is lower than a third value that is a lower limit of a proper range.

24. The refrigerator according to claim 16,

wherein said electrostatic atomization apparatus is stopped when the current detected by said discharge current detection unit is higher than a second value that is higher by a predetermined value than an upper limit of a proper range.

25. The refrigerator according to claim 16,

wherein said electrostatic atomization apparatus is stopped when the current detected by said discharge current detection unit is lower than a fourth value that is lower by a predetermined value than a lower limit of a proper range.

26. The refrigerator according to claim 15,

wherein said atomization electrode is cooled to cause ambient air to form dew condensation to thereby generate water.

27. The refrigerator according to claim 1,

wherein said atomization unit is an electrostatic atomization apparatus that includes:

an application electrode for applying a voltage to a liquid;

a counter electrode disposed facing said application electrode; and

a voltage application unit configured to apply a high voltage between said application electrode and said counter electrode, and generates a fine mist into said storage compartment,

said atomization state determination unit is an ozone amount determination unit configured to determine an ozone generation amount when said electrostatic atomization apparatus sprays the fine mist,

said refrigerator further comprises

a water supply unit configured to supply a liquid to said electrostatic atomization apparatus, and

said control unit is configured to control said electrostatic atomization apparatus according to a signal from said ozone amount determination unit.

28. The refrigerator according to claim 27,

wherein said ozone amount determination unit includes a discharge current detection unit configured to detect a current when said voltage application unit discharges, and

said control unit includes a control circuit that controls said voltage application unit according to a signal detected by said discharge current detection unit.

29. The refrigerator according to claim 28,

wherein the voltage applied between said application electrode and said counter electrode by said voltage application unit is forcibly decreased when the current detected by said discharge current detection unit is higher than a first value that is an upper limit of a proper range, and

the voltage applied between said application electrode and said counter electrode by said voltage application unit is forcibly increased when the current detected by said discharge current detection unit is lower than a third value that is a lower limit of the proper range.

30. The refrigerator according to claim 27,

wherein said ozone amount determination unit includes a discharge current detection unit configured to detect a current when said voltage application unit discharges, and

said control unit includes a control circuit that controls said water supply unit according to a signal detected by said discharge current detection unit.

31. The refrigerator according to claim 30,

wherein said water supply unit includes a water pump, and

said control unit is configured to control an amount of water conveyed by said water pump.

32. The refrigerator according to claim 30,

wherein said water supply unit includes an on-off valve that opens and closes a water path, and

said control unit is configured to control the opening and closing of said on-off valve.

33. The refrigerator according to claim 30,

wherein an amount of liquid supplied to said electrostatic atomization apparatus by said water supply unit is decreased when the current detected by said discharge current detection unit is higher than a first value that is an upper limit of a proper range, and

the amount of liquid supplied to said electrostatic atomization apparatus by said water supply unit is increased when the current detected by said discharge current detection unit is lower than a third value that is a lower limit of the proper range.

34. The refrigerator according to claim 28,

wherein said electrostatic atomization apparatus is stopped when the current detected by said discharge current detection unit is higher than a second value that is higher by a predetermined value than an upper limit of a proper range.

35. The refrigerator according to claim 28,

wherein said electrostatic atomization apparatus is stopped when the current detected by said discharge current detection unit is lower than a fourth value that is lower by a predetermined value than a lower limit of a proper range.

36. The refrigerator according to claim 27,

wherein said ozone amount determination unit includes an ozone concentration detection unit configured to detect an ambient ozone concentration of said electrostatic atomization apparatus.

37. The refrigerator according to claim 36,

wherein said control unit includes a control circuit that controls said voltage application unit or said water supply unit so that the ozone concentration is in a predetermined range, according to a signal detected by said ozone concentration detection unit.