Khanh H Dinh

US Patent:

6742284, Jun 1, 2004

Filed:

Jan 8, 2002

Appl. No.:

10/041255

Inventors:

Khanh Dinh - Gainesville FL

Assignee:

Advanced Dryer Systems, Inc. - Alachua FL

International Classification:

F26B 332

US Classification:

34514, 34 86, 34515, 34218, 165909

Abstract:

The invention is a drying system and a method for its use, the drying system having a container containing a product to be dried and a dryer. The dryer includes an inlet for providing the drying air, a drying air pathway, and a furnace for heating the drying air. The drying air flows through a supply route to the container, where the drying air dries the product and is converted into a return air. The return air flows through a return route back to the dryer. The return air flows through a return air pathway and a heat exchanger which intersects the return air pathway and the drying air pathway. The heat exchanger transfers heat from the return air to the drying air. The return air is exhausted through an outlet. In a preferred embodiment, the container is a tobacco barn and the product is tobacco.

US Patent:

6745830, Jun 8, 2004

Filed:

Jan 22, 2003

Appl. No.:

10/348816

Inventors:

Khanh Dinh - Gainesville FL 32605

Assignee:

Khanh Dinh - Gainesville FL

International Classification:

F28F 2700

US Classification:

165274, 16510425

Abstract:

A heat pipe loop includes a first heat pipe section having a first temperature and a second heat pipe section having a second temperature higher than the first temperature. The first heat pipe section is a condenser and the second heat pipe section is an evaporator. A vapor line connects an upper portion of the first heat pipe section with an upper portion of the second heat pipe section. A liquid line connects a lower portion of the first heat pipe section with a lower portion of the second heat pipe section. In one embodiment, the first heat pipe section is disposed at a first elevation and the second heat pipe section is disposed at a second elevation higher than the first elevation. A pump directs liquid from the first heat pipe section to the second heat pipe section through the liquid line.

US Patent:

8262263, Sep 11, 2012

Filed:

Nov 16, 2008

Appl. No.:

12/271897

Inventors:

Khanh Dinh - Gainesville FL, US

International Classification:

F21V 29/00

US Classification:

362373, 362294, 16510421, 16510433

Abstract:

In one aspect, a cooling device for an LED chip mounted on a heat sink includes an enclosed tube in contact with the heat sink. The tube includes a vacuum section surrounded by a plurality of cooling fins and a liquid-filled section surrounded by a plurality of cooling fins. The liquid-filled section is in contact with the heat sink. In another aspect, an apparatus includes a heat sink, an LED chip mounted on the heat sink, and an enclosed tube in contact with the heat sink. The tube includes a vacuum section surrounded by a plurality of cooling fins and a liquid-filled section surrounded by a plurality of cooling fins. The liquid-filled section is in contact with the heat sink.

US Patent:

20090126387, May 21, 2009

Filed:

Nov 16, 2008

Appl. No.:

12/271896

Inventors:

Khanh Dinh - Gainesville FL, US

Assignee:

Dinh Research LLC - Gainesville FL

International Classification:

F25D 21/00
F25B 1/00

US Classification:

62272, 62498

Abstract:

In one aspect, a dehumidifier is provided for installation in an air duct of an HVAC system. The air duct has air flowing therethrough controlled by a blower of the HVAC system. The dehumidifier includes an enclosure, which includes a compressor connected to an evaporator and a condenser. The evaporator has a first air flow rate for the air flowing therethrough. The condenser has a second air flow rate for the air flowing therethrough, wherein the second air flow rate is higher than the first air flow rate. In another aspect, the evaporator has a first air impingement surface area for the air flowing therethrough. The condenser has a second air impingement surface area for the air flowing therethrough, wherein the air impingement surface area is larger than the first air impingement surface area. Another aspect is drawn to a system wherein a dehumidifier is installed in an air duct.

US Patent:

20130067939, Mar 21, 2013

Filed:

Sep 14, 2012

Appl. No.:

13/616914

Inventors:

Khanh Dinh - Gainesville FL, US

International Classification:

F25B 27/00

US Classification:

62 79, 622386

Abstract:

An apparatus is configured to receive an incoming air stream from within an enclosure and to exhaust an outgoing air stream into the enclosure, the incoming and outgoing air streams flowing in a flow direction. The apparatus comprises an evaporator, a compressor, a condenser, and a heat exchanger. The heat exchanger has a heat extraction portion and a heat depositing portion, wherein the heat extraction portion is disposed in an air stream outside of the enclosure and wherein the heat depositing portion is disposed downstream of the evaporator with respect to the flow direction. A method includes receiving an incoming air stream from within an enclosure in a dryer apparatus, the apparatus including an evaporator, a compressor, and a condenser. A heat exchanger is operably connected to the dryer apparatus to transfer sensible heat from an air stream outside of the enclosure to a location downstream of the evaporator.

US Patent:

53334701, Aug 2, 1994

Filed:

May 9, 1991

Appl. No.:

7/698165

Inventors:

Khanh Dinh - Alachua FL

Assignee:

Heat Pipe Technology, Inc. - Alachua FL

International Classification:

F25J 100
F28D 1502
F25B 504

US Classification:

62333

Abstract:

An air conditioning system uses heat-pipes in combination with a cooling coil to increase either the dehumidification capacity or the efficiency and capacity of an air-conditioning system. In the dehumidification mode, the secondary cooling coil is inactive, and the heat pipes operate as a heat exchanger between the warm return air and the cold supply air of the air conditioning system to precool the return air and reheat the supply air, increasing the latent capacity of the main cooling coil. In the efficiency and capacity boosting mode, the secondary cooling coil is activated by introducing a portion of the cooling fluid from the air-conditioning system. This results in a neutralization of the effect of the heat pipes as well as an increase in effective heat-exchange area between the cooling fluid and the air, therefore produces an increase in the capacity of the system. In the case of a direct expansion system, the evaporation temperature and pressure of the air-conditioning system are increased by the augmentation of the heat-exchange capacity of the evaporators, resulting in improved thermodynamic efficiencies as well as cooling output capacity. This ability to control the air-conditioning system for maximum dehumidification or maximum cooling efficiency and capacity allows a closer match with the variable load demands for a minimum energy requirement.

US Patent:

55641849, Oct 15, 1996

Filed:

Oct 16, 1995

Appl. No.:

8/543331

Inventors:

Khanh Dinh - Gainesville FL

Assignee:

Heat Pipe Technology, Inc. - Alachua FL

International Classification:

B23P 1526

US Classification:

29890044

Abstract:

A metalworking tool is capable of making internally grooved and externally finned heat exchanger coils from ordinary tubes in a single operation in which the tubes are expanded into bonding mechanical contact with external fins at the same time that grooves are formed in the inner surfaces of the tubes. The process is performed by a tool head having both expanding and groove forming tools mounted thereon. The expanding tool preferably comprises a hardened expansion ball which mechanically expands the tube with or without hydraulic or pneumatic assist. The groove forming tool may comprise a cutting point which scribes the tube, a roller which forges a groove, or any other suitable scribing or forging device. The groove forming tool may rotate or oscillate to produce nonlinear grooves and may form grooves during the in-going and/or out-going strokes of the tool.

US Patent:

57494150, May 12, 1998

Filed:

Feb 19, 1997

Appl. No.:

8/802117

Inventors:

Khanh Dinh - Gainesville FL

Assignee:

Heat Pipe Technology, Inc. - Alacnua FL
Tropic-Kool Engineering Corp. - Largo FL

International Classification:

G05D 2300

US Classification:

165297

Abstract:

A bypass system is incorporated into a roof curb to permit selective partial or complete deactivation of at least one section of a heat pipe of an air conditioning system thereby 1) to permit optimization of the sensible heat ratio of the air conditioning system for prevailing environmental conditions and, 2) to prevent moisture from condensing onto the evaporator or cooling section of the heat pipe and subsequently dripping into the return ducts of the air conditioning system. The bypass system is characterized by a bypass duct located adjacent one of the sections of the heat pipe and a bypass device which selectively channels at least some of the air which would otherwise flow through the controlled section of the heat pipe through the bypass duct instead. In its simplest form, the bypass device may comprise a single damper or the like positioned within the bypass duct. In more sophisticated systems, the bypass device may be located at least in part within the bypass duct and in part within the controlled section of the heat pipe and may comprise, for example, a pair of interconnected dampers or a sliding plate.