US20070193296A1 - Pre-cooling system for an air conditioning condenser - Google Patents
Pre-cooling system for an air conditioning condenser Download PDFInfo
- Publication number
- US20070193296A1 US20070193296A1 US11/707,230 US70723007A US2007193296A1 US 20070193296 A1 US20070193296 A1 US 20070193296A1 US 70723007 A US70723007 A US 70723007A US 2007193296 A1 US2007193296 A1 US 2007193296A1
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- United States
- Prior art keywords
- valve
- vane
- recited
- cooling system
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/46—Component arrangements in separate outdoor units
- F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
- F24F1/50—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow with outlet air in upward direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
- F24F2013/225—Means for preventing condensation or evacuating condensate for evacuating condensate by evaporating the condensate in the cooling medium, e.g. in air flow from the condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/041—Details of condensers of evaporative condensers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/54—Free-cooling systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49359—Cooling apparatus making, e.g., air conditioner, refrigerator
Definitions
- the present invention is directed, in general, to air conditioning systems and, more specifically, to a pre-cooling system for an external air conditioner condenser.
- Air conditioner condenser units have evolved since early units that generally were horizontal air flow, i.e., air discharge is substantially parallel to the ground or unit base, to the more modern condensers with side air inlet and vertical air discharge. Meanwhile, the concept of spraying a mist of cool water on or around external condenser units of air conditioners in order to improve their efficiency has been.
- Several patents have been issued disclosing various details of and improvements to this technology, some of which are limited by the assumption of a horizontal flow condenser or a vertical flow condenser as will be detailed below.
- One early system discloses a water reservoir that resides below the condenser coils with the water drawn from the reservoir and pumped upward to be sprayed onto the condenser and then running down into the reservoir. Thus, a pool of water is constantly in evidence below the condenser, and is a prime breeding ground for mosquitoes and algae.
- Other systems disclose the use of a compressor relay that is electrically connected to a compressor and a water valve. The compressor relay is activated by electrical power to the compressor. The use of an electrical switch to operate an electrical valve adds needless cost and complexity to the system. Additionally, this system requires at least a minimal knowledge of electricity for the installer because the compressor electrical circuit must be tapped in order to activate the water valve. Installation of the device by a property owner would be impractical for most non-skilled persons due to a general respect for or fear of electricity.
- Another device describes a substantially-circular flat plate, that is designed to be lifted by a vertical current of air when the condenser fan is operating. The description does not make it clear what-minimum force must be exerted by the vertical exhaust to move the flat plate and operate the valve. Attempts by the present inventor to use a substantially-circular paddle with current vertical discharge condenser units was met with substantial failure. The plain paddle could not be made to operate a suitable valve.
- Another device describes a pneumatically operated paddle that operates a pinch valve inexpensively constructed of polyvinylchloride, more commonly know as PVC, and flexible tubing. It would appear obvious to one of skill in the art that repeated pinching of the tube as the system operates will seriously shorten the life of the tubing.
- Another system requires a temperature sensor for activating the water mist when the temperature in the condenser reaches a predetermined point. This is an unnecessary complication of the system.
- Other systems employ one or more of: a vibration transducer, battery backup power, temperature sensing bellows, etc., and unnecessarily complicate the system.
- FIG. 1A illustrates a partial sectional, elevation view of one embodiment of a pre-cooling system constructed according to the principles of the present invention for use with a vertical exhaust air conditioning condenser system;
- FIG. 1B illustrates a schematic view of one embodiment of a pre-cooling system constructed according to the principles of the present invention
- FIG. 2 illustrates a partial sectional view of the valve and the vane of FIG. 1 along plane 2 - 2 when the fan is not operating;
- FIG. 3 illustrates a cross sectional view of a portion of the vane of FIG. 1 along the plane 3 - 3 ;
- FIG. 4 illustrates a sectional view of the valve and the vane of FIG. 1 along plane 2 - 2 when the fan is operating;
- FIG. 5 illustrates a plan view of a pre-cooling system kit for use in retrofitting an existing air conditioning condenser and constructed according to the principles of the present invention.
- FIG. 1A illustrated is a partial sectional, elevation view of one embodiment of a pre-cooling system 100 constructed according to the principles of the present invention for use with a vertical exhaust air conditioning condenser system 190 .
- the vertical exhaust air conditioning system 190 shown is typical of condenser units 191 currently used for residential and commercial applications.
- the condenser unit 191 typically has two or three open (unblocked) sides 192 a - 192 b, ( 192 c not visible), an open top 193 and a condenser coil 194 .
- a fourth side 192 d has mechanical and electrical connections to an evaporator 195 and thermostat 196 located within a cooled environment 197 served by the air conditioner 190 .
- Ambient air 199 to cool the condenser coil 194 is drawn in through the open sides 192 a - 192 c of the condenser unit 191 and exhausted through the top 193 by an electric fan 198 having a plurality of fan blades 198 a.
- a force generated by the electric fan 198 is limited by the power of an electric motor 198 b and the design of the fan blades 198 a which are generally designed only to move a desired amount of air per unit time through the condenser coil 194 .
- the air 199 passes through the condenser coil 194 and is ejected as exhaust 189 in a substantially-vertical direction.
- the condenser unit 191 may employ fixed grillwork 193 a or fixed baffles (not shown) in the exhaust 189 to direct the exhaust in a more structured way and to prevent personnel injury from the rotating fan blades 198 a.
- the pre-cooling system 100 comprises: a housing 110 , a valve 120 , a vane 130 , a water supply tube 140 , a spray nozzle 150 , spray tubing 160 , a filter 170 , and a hose coupling 180 .
- the filter 170 comprises an in-line water filter having a nominal 5-micron polyethylene element designed to remove non-dissolved impurities, and additionally hexametaphosphate to treat the water.
- Hexametaphosphate is a slow-dissolving, crystalline, food-grade phosphate especially formulated to-control corrosion, lime/scale accumulation and iron oxide precipitation in commercial and institutional service water systems.
- the chemicals used to manufacture hexametaphosphate are listed in the Federal Register No. 227, Nov. 20, 1959, page 9369.
- Most water supplies produce corrosion, scale, or “red water” problems.
- soft ground water supplies may ensure freedom from scale, they generally present serious corrosion problems.
- corrosion is usually overshadowed by the accumulation of efficiency-robbing lime scale deposits. Freedom from serious corrosion and scaling problems does not guarantee freedom from discolored water, staining or fouling of lines and equipment if the water contains dissolved iron.
- Hexametaphosphate When used in a water system, hexametaphosphate forms a thin protective phosphate film on all metal surfaces contacted, thereby reducing corrosive action of the water. The film does not build upon itself and cannot interfere with heat transfer. This protective film must be maintained to provide continuous protection. Hexametaphosphate does not remove or reduce hardness in the water, but simply prevents precipitation of the hardness on the surfaces of the equipment. Of course, other suitable filtering materials may also be used.
- the filter 170 is equipped with a 3 ⁇ 4′′ female fitting 171 on the inlet side and a 3 ⁇ 4′′ male fitting 172 on the outlet side.
- the female fitting 171 is configured to couple to a water source 173 and the male fitting 172 couples to a female hose coupling 141 of the water supply tube 140 .
- the housing 110 is formed of a rigid plastic and coupled to the top 193 of the condenser unit 191 with double-sided tape (not shown).
- the housing 110 may be coupled to the top 193 by any other suitable means, e.g., zip ties, cable ties, safety wire, etc.
- the housing 110 is coupled to the top 193 at a center panel 193 b, enabling the vane 130 to be positioned over the grillwork 193 a where the exhaust air 189 will exit the condenser unit 191 .
- valve 120 is mounted within the housing 110 and is coupled in fluid communication with the water supply tube 140 .
- the valve 120 is further coupled to and in fluid communication with the spray tubing 160 and the spray nozzle 150 .
- the spray tubing 160 is a plurality of sections of spray tubing 160 coupled to and in fluid communication with a like plurality of spray nozzles 150 .
- the number of spray nozzles 150 may be tailored to the size and orientation of the sides 192 a - 192 c of the condenser unit 191 .
- the valve 120 is a pin valve 120 having a pin 221 and a seat 222 .
- the vane 130 rests in a down position, not quite on the grillwork 193 a, due to gravity.
- the vane 130 is capable of pivoting at least some amount about axis 231 .
- surface 232 of the vane 130 bears upon and mechanically forces the pin 221 against the seat 222 so that the valve 120 is closed.
- a rubber O-ring may be located about an end of the pin 221 to seal against the seat 222 .
- valve 120 With the valve 120 closed when the vane 130 is near, but not on the grillwork 193 a, water is prevented from flowing from the water source 173 to the spray tubing 160 and to the spray nozzles 150 . Because the valve 120 is mechanically closed, the valve 120 operates independently of any electrical source.
- FIG. 3 illustrated is a cross sectional view of a portion of the vane 130 of FIG. 1 along the plane 3 - 3 .
- the vane 130 has an aerodynamically-shaped cross section 331 having a leading edge 332 and a trailing edge 333 .
- the vane 130 further has a leading edge thickness 334 and a trailing edge thickness 335 .
- the leading edge thickness 334 is substantially thicker than the trailing edge thickness 335 .
- the vane 130 has a first point 341 on the leading edge 332 that is furthest from the trailing edge 333 .
- the vane 130 has a second point 342 on the trailing edge 333 that is furthest from the leading edge 332 .
- a straight line 336 drawn between the first point 241 and the second point 342 describes a chord 336 of the cross section.
- the vane 130 has a concave undersurface 337 and an uppersurface 338 .
- the vane 130 is aerodynamically sculpted (e.g., an airfoil) in that the uppersurface 338 is longer than the undersurface 337 .
- aerodynamically sculpted e.g., an airfoil
- the molecules of air passing the leading edge point 341 divide into those molecules flowing over the uppersurface 338 and those molecules flowing along the undersurface 337 .
- the molecules thus divided must rejoin in the free stream air 188 above the vane 130 . That is the air that initially strikes the first point 341 divides into a first air flow 343 over the uppersurface 338 and a second air flow 344 under the undersurface 337 .
- the lifting force L created was sufficient to raise the vane 130 , and relieve pressure from surface 232 on the pin valve 120 allowing water to flow through the valve 120 to the spray tubing 160 and the spray nozzles 150 .
- FIG. 4 illustrated is a sectional view of the valve 120 and the vane 130 of FIG. 1 along plane 2 - 2 when the fan 198 is operating.
- the vane 130 lifts above the grillwork 193 a due to aerodynamic lifting as described above.
- the vane 130 pivots about axis 231 relieving pressure from surface 232 on the pin 221 .
- water pressure in supply tubing 140 acts upon the pin valve and forces the pin 221 away from the seat 222 so that the valve 120 is open.
- water pressure on the pin 221 from the supply tubing 140 water flows into a chamber 410 .
- Chamber 410 is in fluid communication with the spray tubing 160 and the spray heads 150 . Therefore, water is allowed to flow from the water source 173 to the spray tubing 160 and to the spray nozzles 150 .
- relieving pressure on the pin 221 allows water pressure to open the valve 120 and is therefore independent of electrical power of any kind.
- the pre-cooling system kit 500 comprises: a housing 510 coupleable to a top of a condenser of an air conditioner, a valve 520 mounted in the housing 510 , a vane 530 coupled to the valve 520 and having an aerodynamically-shaped cross section, supply tubing 540 coupleable to the valve 520 and coupleable to a water source, spray nozzles 550 , spray tubing 560 , a filter 570 , and a hose coupling 580 .
- the pre-cooling system kit 500 is installable on an existing vertical exhaust condenser unit of an air conditioning system.
- the pre-cooling system kit 500 may further comprise double sided tape and zip ties for installation on the condenser.
- the pre-cooling system employs an aerodynamically shaped vane that operates to close a water control valve without resorting to electrical connections. Water pressure opens the water control valve when pressure on the pin is relieved. Therefore, the kit is installable by most homeowners without resorting to hiring an electrician.
- the system has universal application to vertical exhaust condensers for both residential and commercial air conditioning systems.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
A pre-cooling system for use with a condenser of an air conditioning system is provided. In one embodiment, the pre-cooling system comprises a housing that is coupleable to a top of a condenser of an air conditioner wherein the condenser has a substantially-vertical exhaust. The pre-cooling system further comprises a valve mounted in the housing that is coupleable to a water source and wherein the valve is capable of operating independent of electrical power. The pre-cooling system further comprises a vane that is coupled to the valve and positionable in the substantially-vertical exhaust, wherein the vane has an aerodynamically-shaped cross section useable to operate the valve. The present invention further provides a method of manufacturing the pre-cooling system.
Description
- The present invention is directed, in general, to air conditioning systems and, more specifically, to a pre-cooling system for an external air conditioner condenser.
- Air conditioner condenser units have evolved since early units that generally were horizontal air flow, i.e., air discharge is substantially parallel to the ground or unit base, to the more modern condensers with side air inlet and vertical air discharge. Meanwhile, the concept of spraying a mist of cool water on or around external condenser units of air conditioners in order to improve their efficiency has been. Several patents have been issued disclosing various details of and improvements to this technology, some of which are limited by the assumption of a horizontal flow condenser or a vertical flow condenser as will be detailed below.
- One early system discloses a water reservoir that resides below the condenser coils with the water drawn from the reservoir and pumped upward to be sprayed onto the condenser and then running down into the reservoir. Thus, a pool of water is constantly in evidence below the condenser, and is a prime breeding ground for mosquitoes and algae. Other systems disclose the use of a compressor relay that is electrically connected to a compressor and a water valve. The compressor relay is activated by electrical power to the compressor. The use of an electrical switch to operate an electrical valve adds needless cost and complexity to the system. Additionally, this system requires at least a minimal knowledge of electricity for the installer because the compressor electrical circuit must be tapped in order to activate the water valve. Installation of the device by a property owner would be impractical for most non-skilled persons due to a general respect for or fear of electricity.
- Other systems have employed a paddle switch or paddle valve that is activated by airflow created when the fan for the condenser is running. However, certain problems have been found with these units. One device describes a horizontal air flow condenser with an airflow-operated paddle valve assembly conventionally fixed to the air conditioner housing in the path of the horizontally-exhausted air stream. In this case, the paddle pivots on a horizontal pin under the force of horizontal air from the unit fan, thereby overcoming a spring pressure exerted on the paddle to keep the valve normally-closed. No details of the paddle is made, so it is likely that the shape is common, such as: rectangular, circular, or perhaps paddle-shaped, e.g., as in a ping pong paddle. Another device describes a substantially-circular flat plate, that is designed to be lifted by a vertical current of air when the condenser fan is operating. The description does not make it clear what-minimum force must be exerted by the vertical exhaust to move the flat plate and operate the valve. Attempts by the present inventor to use a substantially-circular paddle with current vertical discharge condenser units was met with substantial failure. The plain paddle could not be made to operate a suitable valve.
- Another device describes a pneumatically operated paddle that operates a pinch valve inexpensively constructed of polyvinylchloride, more commonly know as PVC, and flexible tubing. It would appear obvious to one of skill in the art that repeated pinching of the tube as the system operates will seriously shorten the life of the tubing.
- Another system requires a temperature sensor for activating the water mist when the temperature in the condenser reaches a predetermined point. This is an unnecessary complication of the system. Other systems employ one or more of: a vibration transducer, battery backup power, temperature sensing bellows, etc., and unnecessarily complicate the system.
- Accordingly, what is needed in the art is a condenser pre-cooling system that provides the advantages of previous systems but that does not suffer from the deficiencies of the prior art.
- To address the above-discussed deficiencies of the prior art, the present invention provides a pre-cooling system for use with a condenser of an air conditioning system. In one embodiment, the pre-cooling system comprises a housing that is coupleable to a top of a condenser of an air conditioner wherein the condenser has a substantially-vertical exhaust. The pre-cooling system further comprises a valve mounted in the housing that is coupleable to a water source and wherein the valve is capable of operating independent of electrical power. The pre-cooling system further comprises a vane that is coupled to the valve and positionable in the substantially-vertical exhaust, wherein the vane has an aerodynamically-shaped cross section useable to operate the valve. The present invention further provides a method of manufacturing the pre-cooling system.
- The foregoing has outlined preferred and alternative features of the present invention so that those skilled in the art may better understand the detailed description of the invention that follows. Additional features of the invention will be described hereinafter that form the subject of the claims of the invention. Those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiment as a basis for designing or modifying other structures for carrying out the same purposes of the present invention. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the invention.
- For a more complete understanding of the present invention, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
-
FIG. 1A illustrates a partial sectional, elevation view of one embodiment of a pre-cooling system constructed according to the principles of the present invention for use with a vertical exhaust air conditioning condenser system; -
FIG. 1B illustrates a schematic view of one embodiment of a pre-cooling system constructed according to the principles of the present invention -
FIG. 2 illustrates a partial sectional view of the valve and the vane ofFIG. 1 along plane 2-2 when the fan is not operating; -
FIG. 3 illustrates a cross sectional view of a portion of the vane ofFIG. 1 along the plane 3-3; -
FIG. 4 illustrates a sectional view of the valve and the vane ofFIG. 1 along plane 2-2 when the fan is operating; and -
FIG. 5 illustrates a plan view of a pre-cooling system kit for use in retrofitting an existing air conditioning condenser and constructed according to the principles of the present invention. - Referring initially to
FIG. 1A , illustrated is a partial sectional, elevation view of one embodiment of apre-cooling system 100 constructed according to the principles of the present invention for use with a vertical exhaust airconditioning condenser system 190. The vertical exhaustair conditioning system 190 shown is typical ofcondenser units 191 currently used for residential and commercial applications. Thecondenser unit 191 typically has two or three open (unblocked) sides 192 a-192 b, (192 c not visible), anopen top 193 and acondenser coil 194. Afourth side 192 d has mechanical and electrical connections to anevaporator 195 andthermostat 196 located within a cooledenvironment 197 served by theair conditioner 190.Ambient air 199 to cool thecondenser coil 194 is drawn in through the open sides 192 a-192 c of thecondenser unit 191 and exhausted through thetop 193 by anelectric fan 198 having a plurality of fan blades 198 a. A force generated by theelectric fan 198 is limited by the power of anelectric motor 198 b and the design of the fan blades 198 a which are generally designed only to move a desired amount of air per unit time through thecondenser coil 194. Theair 199 passes through thecondenser coil 194 and is ejected asexhaust 189 in a substantially-vertical direction. In some condenser applications, thecondenser unit 191 may employfixed grillwork 193 a or fixed baffles (not shown) in theexhaust 189 to direct the exhaust in a more structured way and to prevent personnel injury from the rotating fan blades 198 a. - Referring now to
FIG. 1B with continuing reference toFIG. 1A , illustrated is a schematic view of one embodiment of apre-cooling system 100 constructed according to the principles of the present invention. Thepre-cooling system 100 comprises: ahousing 110, avalve 120, avane 130, awater supply tube 140, aspray nozzle 150,spray tubing 160, afilter 170, and ahose coupling 180. In a preferred embodiment, thefilter 170 comprises an in-line water filter having a nominal 5-micron polyethylene element designed to remove non-dissolved impurities, and additionally hexametaphosphate to treat the water. - Hexametaphosphate is a slow-dissolving, crystalline, food-grade phosphate especially formulated to-control corrosion, lime/scale accumulation and iron oxide precipitation in commercial and institutional service water systems. The chemicals used to manufacture hexametaphosphate are listed in the Federal Register No. 227, Nov. 20, 1959, page 9369. Most water supplies produce corrosion, scale, or “red water” problems. Although soft ground water supplies may ensure freedom from scale, they generally present serious corrosion problems. However, with subsurface hard bicarbonate waters corrosion is usually overshadowed by the accumulation of efficiency-robbing lime scale deposits. Freedom from serious corrosion and scaling problems does not guarantee freedom from discolored water, staining or fouling of lines and equipment if the water contains dissolved iron. When used in a water system, hexametaphosphate forms a thin protective phosphate film on all metal surfaces contacted, thereby reducing corrosive action of the water. The film does not build upon itself and cannot interfere with heat transfer. This protective film must be maintained to provide continuous protection. Hexametaphosphate does not remove or reduce hardness in the water, but simply prevents precipitation of the hardness on the surfaces of the equipment. Of course, other suitable filtering materials may also be used.
- In one embodiment, the
filter 170 is equipped with a ¾″ female fitting 171 on the inlet side and a ¾″male fitting 172 on the outlet side. The female fitting 171 is configured to couple to awater source 173 and the male fitting 172 couples to afemale hose coupling 141 of thewater supply tube 140. - In a preferred embodiment, the
housing 110 is formed of a rigid plastic and coupled to the top 193 of thecondenser unit 191 with double-sided tape (not shown). Alternatively, thehousing 110 may be coupled to the top 193 by any other suitable means, e.g., zip ties, cable ties, safety wire, etc. In the illustrated embodiment, thehousing 110 is coupled to the top 193 at a center panel 193 b, enabling thevane 130 to be positioned over thegrillwork 193 a where theexhaust air 189 will exit thecondenser unit 191. - Referring now to
FIG. 2 with continuing reference toFIGS. 1A and 1B , illustrated is a partial sectional view of thevalve 120 and thevane 130 ofFIG. 1 along plane 2-2 when thefan 198 is not operating. Thevalve 120 is mounted within thehousing 110 and is coupled in fluid communication with thewater supply tube 140. Thevalve 120 is further coupled to and in fluid communication with thespray tubing 160 and thespray nozzle 150. In the illustrated embodiment, thespray tubing 160 is a plurality of sections ofspray tubing 160 coupled to and in fluid communication with a like plurality ofspray nozzles 150. Of course, the number ofspray nozzles 150 may be tailored to the size and orientation of the sides 192 a-192 c of thecondenser unit 191. In a preferred embodiment, thevalve 120 is apin valve 120 having apin 221 and aseat 222. When thefan 198 is not operating, thevane 130 rests in a down position, not quite on thegrillwork 193 a, due to gravity. Thevane 130 is capable of pivoting at least some amount aboutaxis 231. When thevane 130 is pivoted to the position shown,surface 232 of thevane 130 bears upon and mechanically forces thepin 221 against theseat 222 so that thevalve 120 is closed. A rubber O-ring may be located about an end of thepin 221 to seal against theseat 222. With thevalve 120 closed when thevane 130 is near, but not on thegrillwork 193 a, water is prevented from flowing from thewater source 173 to thespray tubing 160 and to thespray nozzles 150. Because thevalve 120 is mechanically closed, thevalve 120 operates independently of any electrical source. - Referring now to
FIG. 3 with continuing reference toFIGS. 1A, 1B , and 2, illustrated is a cross sectional view of a portion of thevane 130 ofFIG. 1 along the plane 3-3. Thevane 130 has an aerodynamically-shapedcross section 331 having aleading edge 332 and a trailingedge 333. Thevane 130 further has aleading edge thickness 334 and a trailingedge thickness 335. As can be seen, theleading edge thickness 334 is substantially thicker than the trailingedge thickness 335. One who is of skill in the art will recognize that thevane 130 has afirst point 341 on theleading edge 332 that is furthest from the trailingedge 333. Likewise, thevane 130 has asecond point 342 on the trailingedge 333 that is furthest from theleading edge 332. Astraight line 336 drawn between the first point 241 and thesecond point 342 describes achord 336 of the cross section. Further, thevane 130 has aconcave undersurface 337 and anuppersurface 338. - One who is of skill in the art will recognize that the
vane 130 is aerodynamically sculpted (e.g., an airfoil) in that theuppersurface 338 is longer than theundersurface 337. In a highly simplified form (a 2-dimensional model for a 3-dimensional problem) for subsonic airflow (such as thevane 130 will experience due to the exhaust 189), the molecules of air passing theleading edge point 341 divide into those molecules flowing over theuppersurface 338 and those molecules flowing along theundersurface 337. The molecules thus divided must rejoin in thefree stream air 188 above thevane 130. That is the air that initially strikes thefirst point 341 divides into afirst air flow 343 over theuppersurface 338 and asecond air flow 344 under theundersurface 337. As the distance is longer over theuppersurface 338, the air molecules must travel faster in that area than along theundersurface 337. This difference in air molecule velocity creates a difference in air pressure exerted on theundersurface 337 and theuppersurface 338. This effect is described by Bernoulli's Principle, i.e., a lower pressure is evident where fluid motion is faster across a surface. Thus, there is a lower pressure on theuppersurface 338 than on theundersurface 337, giving a net difference in pressure that is the lift L generated by the aerodynamics of thevane 130. With an aerodynamically-shapedcross section 331 formed in thevane 130, the lifting force L created was sufficient to raise thevane 130, and relieve pressure fromsurface 232 on thepin valve 120 allowing water to flow through thevalve 120 to thespray tubing 160 and thespray nozzles 150. - Referring now to
FIG. 4 , illustrated is a sectional view of thevalve 120 and thevane 130 ofFIG. 1 along plane 2-2 when thefan 198 is operating. When thefan 198 is operating, thevane 130 lifts above thegrillwork 193 a due to aerodynamic lifting as described above. Thevane 130 pivots aboutaxis 231 relieving pressure fromsurface 232 on thepin 221. When thevane 130 is pivoted to the position shown, water pressure insupply tubing 140 acts upon the pin valve and forces thepin 221 away from theseat 222 so that thevalve 120 is open. With water pressure on thepin 221 from thesupply tubing 140, water flows into achamber 410.Chamber 410 is in fluid communication with thespray tubing 160 and the spray heads 150. Therefore, water is allowed to flow from thewater source 173 to thespray tubing 160 and to thespray nozzles 150. Thus, relieving pressure on thepin 221 allows water pressure to open thevalve 120 and is therefore independent of electrical power of any kind. - Referring now to
FIG. 5 , illustrated is a plan view of apre-cooling system kit 500 for use in retrofitting an existing air conditioning condenser and constructed according to the principles of the present invention. In one embodiment, thepre-cooling system kit 500 comprises: ahousing 510 coupleable to a top of a condenser of an air conditioner, avalve 520 mounted in thehousing 510, avane 530 coupled to thevalve 520 and having an aerodynamically-shaped cross section,supply tubing 540 coupleable to thevalve 520 and coupleable to a water source,spray nozzles 550,spray tubing 560, afilter 570, and ahose coupling 580. In a preferred embodiment, thepre-cooling system kit 500 is installable on an existing vertical exhaust condenser unit of an air conditioning system. Thepre-cooling system kit 500 may further comprise double sided tape and zip ties for installation on the condenser. - Thus, a pre-cooling system, pre-cooling retrofit kit, and a method of manufacturing the same have been described. The pre-cooling system employs an aerodynamically shaped vane that operates to close a water control valve without resorting to electrical connections. Water pressure opens the water control valve when pressure on the pin is relieved. Therefore, the kit is installable by most homeowners without resorting to hiring an electrician. The system has universal application to vertical exhaust condensers for both residential and commercial air conditioning systems.
- Although the present invention has been described in detail, those skilled in the art should understand that they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the invention in its broadest form.
Claims (18)
1. For use with a condenser unit of an air conditioner, a pre-cooling system, comprising:
a housing coupleable to a top of a condenser of an air conditioner, said condenser having a substantially-vertical exhaust;
a valve mounted in said housing and coupleable to a water source, said valve capable of operating independently of electrically power; and
a vane having an uppersurface and an undersurface, the vane being coupled to said valve and positionable in said substantially-vertical exhaust, said vane having an aerodynamically-shaped cross section useable to operate said valve, wherein said uppersurface is of a length longer than said undersurface.
2. The pre-cooling system as recited in claim 1 wherein said aerodynamically-shaped cross section has a leading edge and a trailing edge, and wherein said leading edge is substantially thicker than said trailing edge.
3. (canceled)
4. The pre-cooling system as recited in claim 1 wherein said vane has a concave undersurface.
5. The pre-cooling system as recited in claim 1 further comprising a water supply tube coupled to said valve and coupleable to said water source.
6. The pre-cooling system as recited in claim 1 further comprising a spray nozzle in fluid communication with said valve.
7. The pre-cooling system as recited in claim 1 further comprising spray tubing interposed said valve and said spray nozzle.
8. The pre-cooling system as recited in claim 1 further comprising a filter coupled to said valve and coupleable to said water source.
9. The pre-cooling system as recited in claim 8 wherein said filter comprises hexametaphosphate.
10. A method of manufacturing a pre-cooling system for use with a condenser unit of an air conditioner, said method comprising:
providing a housing coupleable to a top of a condenser of an air conditioner, said condenser having a substantially-vertical exhaust;
mounting a valve in said housing, said valve coupleable to a water source and capable of operating independently of electrical power; and
coupling a vane to said valve, said vane having an uppersurface and an undersurface, said uppersurface being of a length longer than said undersurface to form an aerodynamically-shaped cross section and positionable in said substantially-vertical exhaust, said aerodynamically-shaped cross section useable to operate said valve.
11. The method as recited in claim 10 wherein coupling a vane includes coupling a vane wherein said aerodynamically-shaped cross section has a leading edge and a trailing edge, and wherein said leading edge is substantially thicker than said trailing edge.
12. The method as recited in claim 11 wherein coupling a vane includes coupling a vane wherein a straight line drawn between said leading edge and said trailing edge defines a chord of said aerodynamically-shaped cross section, and wherein said chord and a direction of said substantially-vertical exhaust define an angle of attack of said vane.
13. The method as recited in claim 10 wherein coupling a vane includes coupling a vane having a concave undersurface.
14. The method as recited in claim 10 further comprising coupling a water supply tube to said valve, said water supply tube coupleable to said water source.
15. The method as recited in claim 10 further comprising coupling a spray nozzle in fluid communication with said valve.
16. The method as recited in claim 10 further comprising interposing spray tubing between said valve and said spray nozzle.
17. The method as recited in claim 10 further comprising coupling a filter to said valve, said filer filter coupleable to said water source.
18. The method as recited in claim 17 wherein interposing a filter includes interposing a filter comprising hexametaphosphate.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/707,230 US20070193296A1 (en) | 2004-01-27 | 2007-02-15 | Pre-cooling system for an air conditioning condenser |
US12/255,834 US8074461B2 (en) | 2004-01-27 | 2008-10-22 | Pre-cooling system for an air conditioning condenser |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76536904A | 2004-01-27 | 2004-01-27 | |
US11/707,230 US20070193296A1 (en) | 2004-01-27 | 2007-02-15 | Pre-cooling system for an air conditioning condenser |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US76536904A Continuation | 2004-01-27 | 2004-01-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/255,834 Continuation US8074461B2 (en) | 2004-01-27 | 2008-10-22 | Pre-cooling system for an air conditioning condenser |
Publications (1)
Publication Number | Publication Date |
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US20070193296A1 true US20070193296A1 (en) | 2007-08-23 |
Family
ID=38426778
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US11/707,230 Abandoned US20070193296A1 (en) | 2004-01-27 | 2007-02-15 | Pre-cooling system for an air conditioning condenser |
US12/255,834 Active 2025-10-30 US8074461B2 (en) | 2004-01-27 | 2008-10-22 | Pre-cooling system for an air conditioning condenser |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US12/255,834 Active 2025-10-30 US8074461B2 (en) | 2004-01-27 | 2008-10-22 | Pre-cooling system for an air conditioning condenser |
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WO2010037186A1 (en) * | 2008-09-30 | 2010-04-08 | Carrier Corporation | Cylindrical condenser |
US20110232859A1 (en) * | 2008-08-28 | 2011-09-29 | Ac Research Labs | Air Conditioner Cooling Device |
US20140263765A1 (en) * | 2011-09-30 | 2014-09-18 | Daikin Industries, Ltd. | Outdoor unit for air conditioning device |
US9689617B2 (en) | 2014-07-07 | 2017-06-27 | Cooling Concepts, Inc. | System for reducing air temperatures adjacent an air cooler |
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US20110312264A1 (en) * | 2009-03-12 | 2011-12-22 | Lg Electronic, Inc. | Outdoor unit for air conditioner |
WO2010105198A1 (en) * | 2009-03-12 | 2010-09-16 | Tonerhead, Inc. | Mist dispersal system for air conditioners |
US20110088425A1 (en) * | 2009-10-21 | 2011-04-21 | John Yenkai Pun | Evaporative condenser with micro water drolets forming ultra thin film |
EP2596299A1 (en) | 2010-07-24 | 2013-05-29 | Matthew Rosenfeld | Techniques for indirect cold temperature thermal energy storage |
JP2017527694A (en) * | 2014-07-14 | 2017-09-21 | スマーター アロイズ インコーポレーテッド | Double memory material, system, method and application |
US10024586B2 (en) | 2016-09-08 | 2018-07-17 | Robert Neil MCLELLAN | Evaporative cooling system |
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Also Published As
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US20100095699A1 (en) | 2010-04-22 |
US8074461B2 (en) | 2011-12-13 |
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