Sorption refrigeration appliance

• US 6,276,159 B1
• Filed: 06/29/2000
• Issued: 08/21/2001
• Est. Priority Date: 09/20/1995
• Status: Expired due to Term

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Pfister, Dennis M., Byrd, Charles M.
• Primary Examiner(s): DOERRLER, WILLIAM CHARLES
• Application Number:
  US09/607,154
• Time in Patent Office: 418 Days
• Field of Search: 623/31, 622/383, 624/97, 624/80, 624/81, 621/01
• US Class Current: 62/331
• CPC Class Codes: F25B 17/08 the absorbent or adsorbent being a solid, e.g. salt F25B17/12 takes precedence
• CPC Class Codes: F25B 2333/005 the generator or boiler uses electromagnetic energy in the form of microwaves for desorbing the sorbate from the sorbate/sorbent compound
• CPC Class Codes: F25B 35/04 using a solid as sorbent
• CPC Class Codes: F25B 39/026 specially adapted for sorption type systems
• CPC Class Codes: F25B 49/046 Operating intermittently
• CPC Class Codes: F25D 23/12 Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
• CPC Class Codes: H01L 23/427 Cooling by change of state, e.g. use of heat pipes by liquefied gas H01L23/445
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05B 6/701 using microwave applicators
• CPC Class Codes: H05B 6/74 Mode transformers or mode stirrers
• CPC Class Codes: H05B 6/802 for heating fluids methods of heating fluids in conventional microwave ovens H05B6/687
• CPC Class Codes: H05B 6/808 Microwave heating adapted for vending machines
• CPC Class Codes: H05K 7/20363 Refrigerating circuit comprising a sorber

Abstract

A combination heating and cooling apparatus which comprises a compartment into which an item to be heated or cooled may be placed; an electromagnetic wave generator; wherein during a first mode of operation of the apparatus, the electromagnetic waves are directed into the compartment to heat the item; at least one sorber having a housing defining an enclosure; a sorbate/sorbent compound located within the enclosure; a waveguide for coupling electromagnetic waves generated by the electromagnetic wave generator to the sorber; wherein electromagnetic waves transmitted by the electromagnetic wave generator are propagated through the enclosure to desorb the sorbate from the sorbate/sorbent compound; a condenser connected to the sorber; an evaporator connected to both the condenser and the sorber and positioned in heat exchange relation with the compartment; and a controllable valve interposed between the condenser and the evaporator; wherein sorbate which is desorbed in the sorber is condensed in the condenser and then, during a second mode of operation of the apparatus, controllably released into the evaporator to create a cooling effect and cool the item, after which the sorbate is drawn back into the sorber.

Claims

1. A combination heating and cooling apparatus, comprising:

a compartment, wherein an item to be heated or cooled is disposed within the compartment during use;

an evaporator coupled to the compartment, wherein a sorbate within the evaporator is configured to absorb heat from the compartment such that the sorbate is evaporated and the item is cooled during use;

a sorbent disposed within a sorber, wherein the evaporated sorbate is adsorbed on the sorbent during use; and

an electromagnetic energy source configured to generate electromagnetic energy during use, wherein the electromagnetic energy source is coupled to the sorber and the compartment such that the generated electromagnetic energy is directed to the compartment to heat the item or to the sorber to desorb the sorbate from the sorbent during use.

2. The apparatus of claim 1, wherein the evaporator is coupled to the compartment such that the evaporator surrounds a portion of the compartment.

3. The apparatus of claim 1, wherein the evaporator is in fluid communication with the sorber.

4. The apparatus of claim 1, further comprising a condenser in fluid communication with the sorber and the evaporator, and wherein the condenser is configured to condense the sorbate during use.

5. The apparatus of claim 1, further comprising a controllable valve in fluid communication with the evaporator, and wherein the controllable valve is configured to control an amount of sorbate which is provided to the evaporator during use.

6. The apparatus of claim 1, further comprising a movable metallic shutter configured to selectively allow the generated electromagnetic energy to be directed to the compartment or to be directed the sorber during use.

7. The apparatus of claim 1, wherein the sorbent in a metal halide salt.

8. The apparatus of claim 1, wherein the sorbent is strontium bromide and the sorbate is ammonia.

9. The apparatus of claim 1, wherein the sorber comprises a hollow outer conductor and an inner conductor coaxial with the outer conductor, the inner and outer conductors being sized and spaced to form a waveguide for the electromagnetic energy.

10. The apparatus of claim 9, wherein the inner conductor extends substantially the length of the outer conductor and the sorbent is positioned between the inner and outer conductors.

11. The apparatus of claim 1, further comprising a waveguide configured to couple the electromagnetic energy source to the sorber and to the compartment.

12. The apparatus of claim 11, wherein the waveguide comprises a first section positioned adjacent the compartment, and wherein the compartment comprises a window through which electromagnetic energy may be transmitted from the first section to the compartment.

13. The apparatus of claim 1, wherein the desorption of the sorbate from the sorbent is primarily isothermal.

14. A combination heating and cooling apparatus, comprising:

a compartment, wherein an item to be heated or cooled is disposed within the compartment during use;

an evaporator coupled to the compartment, wherein a sorbate within the evaporator is configured to absorb heat from the compartment such that the sorbate is evaporated and the item is cooled during use;

a sorbent disposed within a sorber, wherein the evaporated sorbate is adsorbed on the sorbent during use;

an electromagnetic energy source configured to generate electromagnetic energy during use, wherein the electromagnetic energy source is coupled to the sorber and the compartment such that the generated electromagnetic energy is directed to the compartment to heat the item or to the sorber to desorb the sorbate from the sorbent during use; and

a microcontroller configured to control the electromagnetic energy source during use.

15. The apparatus of claim 14, further comprising a movable metallic shutter configured to selectively allow the generated electromagnetic energy to be directed to the compartment or to be directed the sorber during use.

16. The apparatus of claim 15, wherein the microcontroller is further configured to control the movable metallic shutter during use.

17. The apparatus of claim 15, wherein the microcontroller is configured to position the movable metallic shutter during use such that the sorbent is desorbed from the sorbent while the apparatus is not being used to heat or cool the item such that the sorbent adsorbs sorbate immediately upon evaporation of the sorbate.

18. The apparatus of claim 14, further comprising a condenser in fluid communication with the sorber and a controllable valve, wherein the controllable valve is in fluid communication with the evaporator, and wherein the microcontroller is further configured to control the controllable valve during use such that the sorbate is selectively discharged into the evaporator.

19. A combination heating and cooling apparatus, comprising:

a compartment, wherein an item to be heated or cooled is disposed within the compartment during use;

an evaporator coupled to the compartment, wherein a sorbate within the evaporator is configured to absorb heat from the compartment such that the sorbate is evaporated and the item is cooled during use;

a sorbent disposed within a sorber, wherein the evaporated sorbate is adsorbed on the sorbent during use, and wherein a first portion of the sorber extends into the compartment; and

an electromagnetic energy source configured to generate electromagnetic energy during use, wherein the electromagnetic energy source is coupled to the compartment such that the generated electromagnetic energy is directed to the compartment to heat the item and to the first portion of the sorber to desorb the sorbate from the sorbent during use.

20. The apparatus of claim 19, wherein the directed electromagnetic energy is effective to simultaneously heat the item and desorb the sorbate from the sorbent.

21. The apparatus of claim 19, wherein a size and a position of the first portion of the sorber is determined by a dispersion of microwaves in the compartment during use, and wherein the dispersion of microwaves in the compartment is estimated by a numerical modeling technique.

22. The apparatus of claim 19, wherein the evaporator is coupled to the compartment such that the evaporator surrounds a portion of the compartment.

23. The apparatus of claim 19, wherein the evaporator is in fluid communication with the sorber.

24. The apparatus of claim 19, further comprising a condenser in fluid communication with the sorber and the evaporator, and wherein the condenser is configured to condense the sorbate during use.

25. The apparatus of claim 19, further comprising a controllable valve in fluid communication with the evaporator, and wherein the controllable valve is configured to control an amount of sorbate which is provided to the evaporator during use.

26. The apparatus of claim 19, wherein the sorbent in a metal halide salt.

27. The apparatus of claim 19, wherein the sorbent is strontium bromide and the sorbate is ammonia.

28. The apparatus of claim 19, wherein the sorber comprises a hollow outer conductor and an inner conductor, and wherein the inner conductor comprises a second portion extending, coaxially within the outer conductor.

29. The apparatus of claim 28, wherein the first portion of the sorber extended into the compartment comprises a first portion of the inner conductor extending from the second portion of the inner conductor.

30. The apparatus of claim 29, wherein the first portion of the inner conductor is perpendicular to the second portion of the inner conductor.

31. The apparatus of claim 19, wherein the desorption of the sorbate from the sorbent is primarily isothermal.

32. A combination heating and cooling apparatus, comprising:

a compartment, wherein an item to be heated or cooled is disposed within the compartment during use;

an evaporator coupled to the compartment, wherein a sorbate within the evaporator is configured to absorb heat from the compartment such that the sorbate is evaporated and the item is cooled during use;

a sorbent disposed within a sorber, wherein the evaporated sorbate is adsorbed on the sorbent during use, wherein the sorber is disposed within the compartment; and

an electromagnetic energy source configured to generate electromagnetic energy during use, wherein the electromagnetic energy source is coupled to the compartment such that the generated electromagnetic energy is directed to the compartment to heat the item and to the sorber to desorb the sorbate from the sorbent during use.

33. The apparatus of claim 32, wherein the directed electromagnetic energy is effective to simultaneously heat the item and desorb the sorbate from the sorbent.

34. The apparatus of claim 32, wherein a size and a position of the sorber disposed within the compartment is determined by a dispersion of microwaves in the compartment during use, and wherein the dispersion of microwaves in the compartment is estimated by a numerical modeling technique.

35. The apparatus of claim 32, wherein the evaporator is coupled to the compartment such that the evaporator surrounds a portion of the compartment.

36. The apparatus of claim 32, wherein the evaporator is in fluid communication with the sorber.

37. The apparatus of claim 32, further comprising a condenser in fluid communication with the sorber and the evaporator, and wherein the condenser is configured to condense the sorbate during use.

38. The apparatus of claim 32, further comprising in fluid communication with the evaporator, and wherein the controllable valve is configured to control an amount of sorbate which is provided to the evaporator during use.

39. The apparatus of claim 32, wherein the sorbent in a metal halide salt.

40. The apparatus of claim 32, wherein the sorbent is strontium bromide and the sorbate is ammonia.

41. The apparatus of claim 32, wherein the sorber comprises a non-metallic housing and an inner conductor located within the non-metallic housing, and wherein generated electromagnetic energy directed to the sorber is received by the inner conductor during use, re-radiated by the inner conductor, and propagated through the sorber to desorb the sorbate from the sorbent during use.

42. The apparatus of claim 32, wherein the compartment comprises a chamber, and wherein the sorber is disposed within the chamber, and wherein an electromagnetic wave-transparent cover is secured over the chamber to form a sealed enclosure, and wherein the generated electromagnetic energy is propagated through the cover and into the sorber to desorb the sorbate from the sorbent during use.

43. The apparatus of claim 32, wherein the desorption of the sorbate from the sorbent is primarily isothermal.

44. A system, comprising:

a refrigerator having a cooling compartment and a freezing compartment;

an ice maker configured to freeze a volume of water to provide ice during use;

a microwave oven having a cooking chamber;

an evaporator coupled to the refrigerator and the ice maker, wherein a sorbate is disposed within the evaporator;

a sorber, wherein a sorbent is disposed within the sorber; and

an electromagnetic wave generator coupled to the cooking chamber and the sorber, wherein the electromagnetic wave generator is configured to provide electromagnetic energy to the cooking chamber to heat an item disposed within the cooking chamber during use and to provide electromagnetic energy to the sorber to desorb a sorbate adsorbed on the sorbent during use.

45. The system of claim 44, wherein the system comprises at least two evaporators.

46. The system of claim 44, wherein the system comprises at least two sorbers.

47. A method of selectively heating and cooling an item, comprising:

positioning the item in a compartment;

directing electromagnetic energy into the compartment such that the item is heated;

evaporating a sorbate in an evaporator, wherein the evaporation of the sorbate cools the item;

adsorbing the sorbate onto a sorbent, wherein the sorbent is disposed within a sorber; and

directing electromagnetic energy to the sorber such that the sorbate is desorbed.

48. The method of claim 47, wherein directing electromagnetic energy into the compartment and directing electromagnetic energy to the sorber are performed simultaneously.

49. The method of claim 47, further comprising condensing the desorbed sorbate in a condenser, wherein the condenser is in fluid communication with the sorber, and wherein the sorber is in fluid communication with the evaporator.

50. The method of claim 47, further comprising controlling an amount of sorbate in the evaporator by using a controllable valve, wherein the controllable valve is in fluid communication with the evaporator.

51. The method of claim 47, further comprising:

generating electromagnetic energy using an electromagnetic energy source; and

controlling the electromagnetic energy source using a microcontroller, and wherein said microcontroller is coupled to the electromagnetic energy source.