Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7814761 | Air conditioner An air conditioner according to the present invention prevents freezing of an outdoor heat exchanger in heating operation. A refrigeration cycle is formed by sequentially connecting a compressor 1, a four-way valve 2, an indoor heat exchanger 3,... | 10/19/2010 |
| 7591145 | Heat pump/direct expansion heat pump heating, cooling, and dehumidification system A heat pump heat pump system, operating with an R-410A refrigerant, comprised of at least one of an air source heat pump system, a water source heat pump system, and a direct expansion heat pump system, preferably for use in a Deep Well Direct Expansion heat pump sy... | 09/22/2009 |
| 7370483 | Refrigerant cycle with three-way service valve for environmentally friendly refrigerant A refrigerant cycle is provided with a single three-way service valve that is utilized for draining and adding refrigerant. In the prior art, a second two-way valve was used in combination with the three-way valve. The present invention simply drains the refrigerant... | 05/13/2008 |
| 7353664 | Heat pump and compressor discharge pressure controlling apparatus for the same Disclosed herein is a heat pump. The heat pump comprises a compressor, indoor and outdoor heat exchangers for condensing or evaporating refrigerant compressed by the compressor according to cooling or heating operation mode, a four-way valve for guiding the flow of ... | 04/08/2008 |
| 7347062 | Ejector cycle An ejector cycle with an ejector includes a nozzle for decompressing refrigerant. A receiver for storing refrigerant is disposed at a refrigerant outlet side of a condenser. A bypass passage and a switching valve for opening and closing the bypass passage are provid... | 03/25/2008 |
| 7340915 | Refrigerator door having dispenser A refrigerator door having a dispenser is disclosed. The refrigerator door includes an outer case forming a front appearance of the refrigerator door, an inner case forming a rear appearance of the refrigerator door, and an insulation layer disposed between the oute... | 03/11/2008 |
| 7316120 | Refrigeration/air conditioning equipment Refrigeration/air conditioning equipment includes a first internal heat exchanger for exchanging heat between a refrigerant to be sucked in a compressor and a high-pressure liquid refrigerant, an injection circuit for evaporating a bypassed high-pressure liquid at i... | 01/08/2008 |
| 7299649 | Vapor injection system A heat pump includes a first and second heat exchanger, a scroll compressor and a flash tank in fluid communication. The flash tank includes an inlet fluidly coupled to the heat exchangers to receive liquid refrigerant. Furthermore, the flash tank includes a first o... | 11/27/2007 |
| 7275385 | Compressor with vapor injection system A heat pump system includes a first heat exchanger, a second heat exchanger in fluid communication with the first heat exchanger, a scroll compressor in fluid communication with each of the first and second heat exchangers, and a flash tank in fluid communication wi... | 10/02/2007 |
| 7237405 | Refrigeration apparatus In the case where a 100 percent heat recovery operation mode is performed without using an outdoor heat exchanger in a refrigeration apparatus which is provided with utilization-side heat exchangers of a plurality of piping systems and in which liquid-side communica... | 07/03/2007 |
| 7104086 | Refrigeration apparatus A refrigeration apparatus is provided with a vapor compression type refrigerant circuit. With this apparatus, reliability from the standpoint of the pipe cleaning mode of the apparatus is improved. The air conditioning system has a main refrigerant circuit that has ... | 09/12/2006 |
| 7096679 | Transcritical vapor compression system and method of operating including refrigerant storage tank and non-variable expansion device A transcritical vapor compression system includes a fluid circuit circulating a refrigerant in a closed loop. The fluid circuit has operably disposed therein, in serial order, a compressor, a first heat exchanger, at least one non-variable expansion device and a sec... | 08/29/2006 |
| 7086250 | Outdoor unit of air conditioner An outdoor air conditioner unit is connected to indoor units by a gaseous refrigerant communication pipe and a liquid refrigerant communication pipe. The outdoor air conditioner unit is provided with a gas-side shut-off valve and a liquid-side shut-off valve. The ga... | 08/08/2006 |
| 6959557 | Apparatus for the storage and controlled delivery of fluids A vessel for containing a refrigerant fluid in a vapor compression system. The vessel includes a housing defining a fixed interior volume and an internal structure subdividing the interior volume into a storage chamber and a displacement chamber. The storage chamber... | 11/01/2005 |
| 6826924 | Heat pump apparatus Indoor circuits (60, 65) of indoor units (12, 13) are each connected in parallel to an outdoor circuit (20) of an outdoor unit (11). The outdoor circuit (20) has a gas vent pipe (35) by which a receiver (23) is brough... | 12/07/2004 |
| 6536677 | Automation and control of solar air conditioning systems A solar powered air conditioning system includes an absorption machine coupled to three primary loops. A heat loop provides energy to the absorption machine. A cooling tower loop exhausts heat from the absorption machine. A chilled water loop is used to d... | 03/25/2003 |
| 6378323 | Reversible heat pump with sub-cooling receiver A reversible heat pump system includes heat exchangers having significantly different refrigerant handling capacities and a refrigerant holding device for holding excess refrigerant during the heating mode of operation. The refrigerant holding device incl... | 04/30/2002 |
| 6185953 | Heat transport system A heat exchanger (1) on the secondary heat source, which exchanges heat with a heat exchanger (12) on the primary heat source in a primary cooling circuit (A), is connected with an indoor heat exchanger (3) through a gas pipe (6) and a liquid pipe (7). A ... | 02/13/2001 |
| 6122923 | Charge control for a fresh air refrigeration system A refrigeration system comprising: a duct; a compressor having an inlet and an outlet; a reheat coil located in the duct and having an outlet and an inlet operatively connected to the compressor outlet; and a condenser having an outlet, and an inlet opera... | 09/26/2000 |
| 6109046 | Air conditioning apparatus for a vehicle with a heating loop including a variable output compressor In a motor vehicle air conditioning apparatus, the fluid flowing in the circuit of the apparatus flows in a bypass branch, bypassing the condenser, in a heating mode of the apparatus. The evaporator then receives the fluid in a gaseous state and acts as a... | 08/29/2000 |
| 6092382 | Kitchen unit and the use thereof for the handling or portions of kitchen garbage at the source The invention relates to a kitchen unit (100) for the handling of portions of household garbage at the source, i.e. in the individual households, said kitchen unit being in the form of a box, which fits into a kitchen table. The first compartment (7) is c... | 07/25/2000 |
| 6070420 | Variable refrigerant, intrastage compression heat pump A heat pump system, utilizing a multi-component refrigerant blend in which a low pressure component is zeotropic with respect to the remainder of the blend, separates the low pressure component by rectification to enhance heating capability in low ambient... | 06/06/2000 |
| 6065302 | Heat transport system A heat exchanger (1) on the secondary heat source, which exchanges heat with a heat exchanger (12) on the primary heat source in a primary cooling circuit (A), is connected with an indoor heat exchanger (3) through a gas pipe (6) and a liquid pipe (7). A ... | 05/23/2000 |
| 6062035 | Air conditioner By using a heat storage circuit or a refrigerating cycle as a heat source, cold heat or hot heat is applied from the heat source to secondary refrigerant in a main refrigerant circuit (20). By a heating or a cooling action of a small-sized refrigerating m... | 05/16/2000 |
| 5937670 | Charge balance device The present invention is a charge balance device for a heat pump. The heat pump system has a heating and a cooling mode and includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, refrigerant circuitry connecting the heat exchangers an... | 08/17/1999 |
| 5784892 | Refrigerant charge variation mechanism A heat pump system capable of heating and cooling an indoor space includes a refrigerant compressor having a discharge side and a suction side interconnected with respective indoor and outdoor heat exchanger coils via a reversing valve, and a condensed re... | 07/28/1998 |
| 5758514 | Geothermal heat pump system A geothermal heating and/or cooling system includes one or more of a plurality of features that enhance the efficiency of the system. Preferably, the system includes a subterranean heat exchanger having tubes disposed against a conductive sheet. The syste... | 06/02/1998 |
| 5737930 | Air conditioning fluid circuit for a vehicle, giving adjustable heating power In a heating mode, the fluid in the air conditioning circuit flows in a bypass branch avoiding the condenser. The evaporator then receives the fluid in the gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The... | 04/14/1998 |
| 5729992 | Refrigerant charge control system for heat pump A geothermal heat transfer system having a plurality of heat exchange loops placed in the ground, each loop having an out flow line and a return line connected by a U-turn juncture. A heat exchange device connects to the loops through the inlet and outlet... | 03/24/1998 |
| 5669223 | Transport temperature control system having enhanced low ambient heat capacity In a transport temperature control system having a cooling and heating mode of operation an apparatus and method are provided for enhancing the heating capacity during the heating mode of operation. A second expansion valve is provided to connect the high... | 09/23/1997 |
| 5653120 | Heat pump with liquid refrigerant reservoir A refrigerant pump system wherein the outdoor coil is larger than the indoor coil to provide for efficient operation when the system is in a cooling mode. A refrigerant reservoir is mounted in a refrigerant line that connects the two coils during a heatin... | 08/05/1997 |
| 5564282 | Variable capacity staged cooling direct expansion geothermal heat pump A "DX" heat pump is provided herein which is based on the principle of providing optimal heat exchange in the heating mode through at least two, but up to five or more parallel ground loops, all but one of which respectively can be cut off from the system... | 10/15/1996 |
| 5533351 | Air conditioner A reversibly operatable refrigerant circulating circuit (1) is formed in such a manner that a compressor (21), an outdoor heat exchanger (23), a motor-operated expansion valve (25) through which refrigerant flows in both directions and an indoor heat exch... | 07/09/1996 |
| 5505059 | Direct heated adsorbent bed heat pump A heat driven solid adsorbent bed heat pump system and method of operating same in which the refrigerant is used both to heat and cool the beds and to heat or cool the space to be conditioned.... | 04/09/1996 |
| 5441659 | Compositions including a fluoroamine and a second component Compositions of N(CF3)a (CHF2)b (CH2 F)c, where a, b and c are integers from 0 to 3 and a+b+c=3, and Cn Fm H2n+2-m, where n is an integer from 1 to 3 and m is an... | 08/15/1995 |
| 5355690 | Air conditioning apparatus An air conditioning apparatus suitable for an electric powered automobile, where at least one of a heating and a dehumidifying operation is effected by utilizing a refrigerating cycle. An upstream heat exchanger and a downstream heat exchanger are arrange... | 10/18/1994 |
| 5319945 | Method and apparatus for non-atmospheric venting of evaporator over-pressure in a refrigeration system An over-pressure control apparatus for a refrigeration system provides for non-atmospheric venting of an evaporator during over-pressure conditions. The control apparatus includes a sensor for indicating evaporator pressure, a storage vessel for receiving... | 06/14/1994 |
| 5313804 | Direct expansion geothermal heat pump A "DX" heat pump is provided herein which is based on the principle of providing optimal heat exchange in the heating mode through three parallel ground loops, two of which can be cut off from the system and evacuated of refrigerant in the cooling mode. T... | 05/24/1994 |
| 5214918 | Refrigerator and method for indicating refrigerant amount A heat-pump device indicates a weight of inappropriate amount of refrigerant in a heat-pump cycle by comparing an actual amount of refrigerant in the heat-pump cycle with an appropriate amount thereof, operates in accordance with a refrigerant amount judg... | 06/01/1993 |
| 5186012 | Refrigerant composition control system for use in heat pumps using non-azeotropic refrigerant mixtures A heat pump system using a non-azeotropic refrigerant mixture comprising a main refrigeration circuit, an engine coolant circuit, and a refrigerant rectifier circuit interfacing with main refrigeration circuit, and the engine coolant circuit. The refriger... | 02/16/1993 |
