Personal Cooling System
First Claim
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1. A personal cooling system comprising:
- a garment including a cooling fluid circulation path to carry a cooling fluid throughout the garment, the circulation path being thermally coupled to a fluid flow path;
a pump that maintains a fluid flow of a working fluid through a fluid flow path, the pump also maintaining flow of the cooling fluid through the cooling fluid circulation path;
an evaporator that operates in the critical flow regime of the working fluid and generates a compression wave that shocks the maintained fluid flow in the fluid flow path, thereby changing the pressure of the maintained fluid flow to cool the fluid;
a heat exchanging mechanism to transfer heat from the system.
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Abstract
A personal cooling system operates by pumping liquid through a garment. Because the personal cooling system pumps liquid, the compression system that generates the cooling power does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the cooling system operates in the critical flow regime in which the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to an increased pressure.
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Citations
20 Claims
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1. A personal cooling system comprising:
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a garment including a cooling fluid circulation path to carry a cooling fluid throughout the garment, the circulation path being thermally coupled to a fluid flow path; a pump that maintains a fluid flow of a working fluid through a fluid flow path, the pump also maintaining flow of the cooling fluid through the cooling fluid circulation path; an evaporator that operates in the critical flow regime of the working fluid and generates a compression wave that shocks the maintained fluid flow in the fluid flow path, thereby changing the pressure of the maintained fluid flow to cool the fluid; a heat exchanging mechanism to transfer heat from the system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A personal cooling system comprising:
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a garment including a cooling fluid circulation path thermally coupled to a fluid flow path; a pump that maintains a fluid flow of a compressible working fluid through a fluid flow path and through the cooling fluid circulation path; and an evaporator that effects a phase change in the compressible working fluid, wherein the evaporator establishes a compression wave in the compressible working fluid by passing the compressible working fluid from a high pressure region to a low pressure region, the velocity of the fluid being greater than or equal to the speed of sound in the compressible working fluid, the compressible working fluid being cooled during a phase change, the cooled working fluid cooling the cooling fluid in the fluid circulation path, thereby cooling the user of the personal cooling system. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification