Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8186175 | Structural improvement for electric energy saving equipment An electric energy saving equipment comprising a coolant compressor, a heat pump, a four way valve, a heating/cooling heat exchanger, an expansion valve, four check valves, an indoor unit of split type air conditioner and piping system for assembling the aforesaid p... | 05/29/2012 |
| 8166773 | Refrigeration capacity banking for thermal cycling A thermal cycling system includes a structure defining a load space, a heating assembly positioned to heat to the load space, and a cooling assembly positioned to cool the load space. The cooling assembly includes a refrigeration circuit and a banking circuit. The r... | 05/01/2012 |
| 8109111 | Refrigerating apparatus having an intermediate-pressure refrigerant gas-liquid separator for performing refrigeration cycle An optional unit (30) including a high pressure side compressor (31) and a gas-liquid separator (33) is provided between an outdoor unit (20) including a low pressure side compressor (21) and an indoor unit (40). During a de... | 02/07/2012 |
| 8037709 | Heat pump with pressure reducer A heat pump HVAC system with an integrated pressure reducer which reduces the head pressure of the system when operating in the cooling mode and thus reduces compressor workload. The heat pump HVAC system includes a compressor for compressing a refrigerant, an exter... | 10/18/2011 |
| 8020402 | Flash tank design and control for heat pumps A heat pump system of the type which re-circulates refrigerant through a fluid circuit between a first heat exchanger and a second heat exchanger includes a compressor coupled to the fluid circuit and a vapor injection system including a vessel fluidly coupled to th... | 09/20/2011 |
| 7984620 | Air conditioning apparatus An air conditioning apparatus has plural indoor units having: plural heat exchangers; and flow controllers respectively corresponding to the heat exchangers. In each of the indoor units, one heat exchanger is used as a condenser, and another heat exchanger is used a... | 07/26/2011 |
| 7975502 | Heat pump apparatus and operating method thereof In a heat pump apparatus of the invention, a refrigerant is circulated through a compressor 31, a radiator 32, a first throttle apparatus 33, a heat exchanger 34, a second throttle apparatus 35 and an evaporator 36 in this o... | 07/12/2011 |
| 7971449 | Heat-activated heat-pump systems including integrated expander/compressor and regenerator Heat-activated heat-pump systems and related methods are disclosed that include a power cycle coupled to a vapor-compression refrigeration cycle both utilizing the same working fluid. The power cycle comprises a boiler, an expander receiving superheated vapor and pr... | 07/05/2011 |
| 7958741 | Integrally molded motor isolation system A heating, ventilation and air conditioning system includes a housing presenting an opening defining a rim surrounding a motor. A plurality of supports extend from the motor and a plurality of posts extend axially between a first end and a second end and interconnec... | 06/14/2011 |
| 7874175 | Heat engine / heat pump using centrifugal fans An engine/heat pump is shown. Most of its parts rotate around the same central axis. It comprises two doubly connected chambers. Blades in each chamber substantially rotate with the chamber and may be firmly attached to the walls of the chamber, thus forming a modif... | 01/25/2011 |
| 7823404 | Air conditioning system with variable condenser reheat and refrigerant flow sequencer A vapor-compression air conditioning system comprising a blower positioned in a return air flow path from a conditioned space, a reheat heat exchanger positioned in the return air flow path and downstream from the blower, a system reversing valve fluidly coupled to ... | 11/02/2010 |
| 7823405 | Rotating bernoulli heat pump Heat engines move heat from a source to a sink. In a subset of heat engines, called heat pumps, the temperature of the source is below that of the sink. A subset of heat pumps, called working-fluid heat pumps, accomplishes the heat-pumping function by varying the te... | 11/02/2010 |
| 7784297 | Cooling heating device An object of the present invention is to provide a cooling heating device in which a suitable operation can be performed in harmony with fluctuations of cooling and heating loads to reduce energy consumption, and the cooling heating device includes an outdoor heat e... | 08/31/2010 |
| 7752864 | Refrigeration apparatus A refrigeration apparatus (1) is provided with a refrigerant circuit (1E) along which are connected a compressor (2), an outdoor heat exchanger (4), an expansion mechanism, an indoor heat exchanger (41) for providing room air condi... | 07/13/2010 |
| 7743621 | Multi-range composite-evaporator type cross-defrosting system The present invention provides a multi-range composite-evaporator type cross-defrosting system for continuous heating operation under an environment temperature range from 20 degree to negative 40 degree Celsius. Said system employs a combination of two defrosting m... | 06/29/2010 |
| 7735333 | Thermal compensation system and device there of in heat pump and refrigeration system An air conditioning and refrigeration system includes a compressor, a four-way valve, two delivering guide pipes joined to two lateral sides of the four-way valve, two thermal compensation devices and two heat exchangers. Even if the air conditioner is a window type... | 06/15/2010 |
| 7685835 | Air conditioning system An air conditioning system includes a heat source unit, an air supply device that supplies the outside air to the room as the ventilation air, a water supply type humidifier for humidifying the ventilation air, a heating medium circuit, and a supply water heating de... | 03/30/2010 |
| 7654104 | Heat pump system with multi-stage compression A multi-compressor heat pump system configured to provide heating and cooling over a range of ambient temperatures. The compressors can be operated independently and alone or together in series for maximum output. Heat exchangers are selectively fluidically connecte... | 02/02/2010 |
| 7650763 | Air conditioning unit, operatable with carbon dioxide, for vehicles and method for operating the air conditioning unit An air conditioning unit for vehicles with work-doing expansion of the carbon dioxide is provided, the air conditioning unit including a combined refrigeration and heat pump circuit, wherein the air conditioning unit is switchably configured to change a flow directi... | 01/26/2010 |
| 7624590 | Multi-type air conditioner A multi-type air conditioner includes an outdoor unit, one or more indoor units communicating with the outdoor unit, and a liquid-stay preventing device heating and evaporating a liquefied refrigerant so as to prevent the liquefied refrigerant circulating between th... | 12/01/2009 |
| 7614249 | Multi-range cross defrosting heat pump system and humidity control system The present invention provides an air-condition heat pump system and two-stage defrosting control method for continuous operation under an environment temperature range from 20 degree to negative 40 degree Celsius or lower. The heat pump system employs different def... | 11/10/2009 |
| 7607317 | Air conditioner with oil recovery function An air conditioner includes a refrigerant circuit that includes a heat source heat exchanger configured such that refrigerant flows in from below and flows out from above when the heat source heat exchanger functions as an evaporator of the refrigerant and a plurali... | 10/27/2009 |
| 7523623 | Heat pump with reheat and economizer functions A heat pump system operates in heating and cooling modes. The heat pump is provided with both a reheat function and economizer circuit. The economizer circuit provides augmented performance to the heat pump, while the reheat coil allows enhanced control over tempera... | 04/28/2009 |
| 7461517 | Refrigerant cycle unit A refrigerant cycle unit having a side heat exchanger for dehumidifying a space, and a heating mode for delivering a refrigerant from a compressor into an internal gas cooler. The refrigerant cycle unit further includes a cooling mode delivering the refrigerant from... | 12/09/2008 |
| 7415838 | Second-refrigerant pump driving type air conditioner A second-refrigerant pump driving type air conditioner, including an indoor unit having an indoor heat exchanger that circulates a refrigerant containing no oil, a first circulator including a compressor that compresses and discharges a refrigerant containing oil, a... | 08/26/2008 |
| 7395677 | Air conditioning system An air conditioning system to treat a latent heat load and a sensible heat load in a room includes a plurality of utilization units, a heat source unit, and connection pipes that connect between the units. The utilization units include adsorbent heat exchangers prov... | 07/08/2008 |
| 7380411 | Heat source unit with switching means between heating and cooling The present invention provides a heat source unit capable of being used in either an air conditioner for switchable cooling and heating operation or an air conditioner for simultaneous cooling and heating operation. An air conditioner principally includes one heat s... | 06/03/2008 |
| 7367200 | Ejector cycle device An ejector cycle device includes an ejector having a nozzle portion which decompresses refrigerant flowing out of a radiator, a first evaporator for evaporating refrigerant from the ejector, and a second evaporator provided in a branch passage that is branched from ... | 05/06/2008 |
| 7363769 | Electromagnetic signal transmission/reception tower and accompanying base station employing system of coaxial-flow heat exchanging structures installed in well bores to thermally control the environment housing electronic equipment within the base station An electromagnetic signal transmission/reception tower and accompanying base station housing sensitive electronic equipment within an environment that is thermally controlled by a system employing a plurality of coaxial-flow heat exchanging structures installed in a... | 04/29/2008 |
| 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 |
| 7350366 | Heat pump The present invention provides a heat pump including: a compressor; a radiator; a first throttling device having a variable opening; an expander; a second throttling device having a variable opening; an evaporator; piping that connects the compressor, the radiator, ... | 04/01/2008 |
| 7350372 | System and method for selective heating and cooling A combined heating/cooling system and method is provided wherein an absorption tank (20) houses a refrigerant and absorbant mixture composition. A boiler (50) heats the high pressure mixture composition and vaporizes the refrigerant. Heated absorbant i... | 04/01/2008 |
| 7343756 | Air conditioning system An air conditioning system comprises a first tank connected to an outlet side refrigerant line of an indoor unit, a second tank disposed to be lower than the first tank, middle tank installed between the first tank and the second tank, a heat source cycle for depres... | 03/18/2008 |
| 7334419 | Heat pump water heater A heat pump water heater system including a water storage tank and a heat exchange system. The heat exchange system includes a heat absorber positioned below the water storage tank and a heat rejecter in fluid communication with the heat absorber and positioned with... | 02/26/2008 |
| 7325414 | Hybrid tandem compressor system with economizer circuit and reheat function for multi-level cooling A tandem compressor refrigerant system where an economizer circuit and reheat coil are incorporated to provide additional flexibility and control over overall system capacity and sensible heat ratio as well as to increase system efficiency. In this system, tandem co... | 02/05/2008 |
| 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 |
| 7316267 | Heat pump water device A flash water heater using a heat pump includes a heat exchanger in which a refrigerant flow path exchanges heat with a water flow path. Tap water is led directly to the water flow path, and hot water supplied from the water flow path is used. The water heater inclu... | 01/08/2008 |
| 7305846 | Freezing device In a refrigerant circuit (20), a refrigerator circuit (110) and a freezing circuit (30) are connected in parallel to an outdoor circuit (40). In the freezing circuit (30), a freezer circuit (130) and a booster circuit (14... | 12/11/2007 |
| 7302811 | Fluid expansion-distribution assembly An expansion-distribution assembly (30) for the heat-absorbing component in a heatpump system. The assembly (30) comprises an envelope (32) forming an expansion chamber (54) and a distribution chamber (56). A shuttle (80) wi... | 12/04/2007 |
| 7299648 | Refrigeration system of air conditioning apparatuses with bypass line between inlet and outlet of compressor A refrigeration system of air conditioning apparatuses with a bypass line between the inlet and outlet of a compressor. The refrigeration system (1) has an expansion unit (10) to execute adiabatic expansion of refrigerant, an indoor unit (20) wi... | 11/27/2007 |
