| Patent application number | Description | Published |
|---|
| 20090065173 | Direct exchange heating/cooling system - A direct exchange heating/cooling system includes a specially designed supplemental air-source heat exchanger (also referred to herein as a High Level Heat Dissipater (“HLHD”). The HLHD is coupled to the primary vapor/hot gas line exiting the system's compressor at a point between the compressor unit and the sub-surface geothermal heat exchange tubing, and is operable only in the cooling mode of system operation. The HLHD includes heat exchange tubing that is sheltered from rain/moisture and has supply and discharge refrigerant transport tubing with relatively equally sized interior diameters, designed solely for mostly vapor (as opposed to liquid) refrigerant transport. The HLHD incorporates at least two check valves, or the like, so as to force hot compressor discharge gas through the HLHD in the cooling mode, and so as to prohibit geothermally warmed refrigerant gas flow through the HLHD in the heating mode. The HLHD has specially designed heat exchangers and may optionally include a fan. | 03-12-2009 |
| 20090095442 | Advanced DX System Design Improvements - A direct exchange geothermal heating/cooling system has a self-adjusting expansion valve and a bypass flow path to improve efficiency when the system operates in a heating mode. The expansion valve may operate based solely on pressure from the vapor refrigerant transport line. The system may alternatively include an accumulator, a compressor, and an oil separator, wherein an oil return line returns oil from the oil separator to the accumulator. Additionally, a direct exchange geothermal heating/cooling system may include a hot-gas bypass valve for diverting heated vapor refrigerant to the liquid refrigerant line. Finally, a direct exchange geothermal heating/cooling system having a sub-surface heat exchanger extending to a depth of at least 300 feet may use a refrigerant particularly suited for such an application. | 04-16-2009 |
| 20090120120 | DX System with Filtered Suction Line, Low Superheat, and Oil Provisions - A heating/cooling system has improved operating efficiencies due to low superheat provisions and a specially configured compressor oil return. For certain systems, such as direct exchange geothermal heating/cooling applications having sub-surface heat exchanges extending at least 100 feet below the surface and using R-410A refrigerant, a specific compressor oil may be used to further improve efficiency. | 05-14-2009 |
| 20090120606 | Double DX Hydronic System - A double DX hydronic heating/cooling system includes a primary DX system for maintaining a primary interior fluid loop at a desired temperature range. Secondary DX sub-systems are operatively coupled to the primary interior fluid loop and are operable in either a heating mode or a cooling mode to provide independent control of interior air temperature in different spaces. Each sub-system includes a dedicated water pump to minimize power requirements for the system. | 05-14-2009 |
| 20090133424 | Direct Exchange System Design Improvements - An R-410A DX heating/cooling system with: an electrical generating expansion device; with a protective means for refrigerant transport tubing containing dissimilar metals and/or in corrosive environments; with an automatic heating mode expansion device; with a TXV by-pass design; with retractable sub-surface tubing designs; with sub-surface line set sizing at varying depths and lengths; with reciprocal compressor sizing; with a DX Hydronic system design; with an improved oil separator float design; with a mobile DX system design; and with a resting module DX system design. | 05-28-2009 |
| 20090260378 | DX System Heat to Cool Valves and Line Insulation - Alternative means of inhibiting frosting in the interior heat exchanger of a DX system when switching from the heating mode to the cooling mode, plus an improved insulation and heat transfer means for vertically oriented sub-surface geothermal heat transfer tubing, as well as a means to protectively coat the sub-surface metal tubing of a DX system in a corrosive environment. | 10-22-2009 |
| 20090272137 | Oil Return, Superheat and Insulation Design - A heating/cooling system design enabling one to maintain a superheat level of more than 1 degree F. and up to 10 degrees F., incorporating a specially designed accumulator, optional special oil return means, a specially designed receiver, and, when utilized in a DX geothermal system application, a preferable sub-surface liquid refrigerant transport line insulation design, as well as a design enabling the utilization of at least two compressors to increase heat transfer temperature differentials together with special oil separators. | 11-05-2009 |
| 20110100588 | DX System Interior Heat Exchanger Defrost Design for Heat to Cool Mode - A DX heating/cooling system includes an automatic hot gas by-pass valve ( | 05-05-2011 |
