CA2199687A1 - Air treatment apparatus for trucks and vehicles and method of assembling and servicing the same - Google Patents
Air treatment apparatus for trucks and vehicles and method of assembling and servicing the sameInfo
- Publication number
- CA2199687A1 CA2199687A1 CA 2199687 CA2199687A CA2199687A1 CA 2199687 A1 CA2199687 A1 CA 2199687A1 CA 2199687 CA2199687 CA 2199687 CA 2199687 A CA2199687 A CA 2199687A CA 2199687 A1 CA2199687 A1 CA 2199687A1
- Authority
- CA
- Canada
- Prior art keywords
- air
- heat exchanger
- treatment apparatus
- vehicle
- handler
- 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
Links
Abstract
A vehicle air treatment apparatus and method for assembling and servicing the apparatus are provided. The vehicle air treatment apparatus includes an air handler having at least one heat exchanger module. The at least one heat exchanger module conditions air applied to the passenger compartment of a vehicle and is removable from the air handler without disconnecting the fluid conduits attached thereto. The air handler preferably includes two heat exchanger modules including a heater core module and an evaporator core module. The system and methods allow HVAC units to be serviced or removed without disconnecting refrigerant or coolant lines which are connected thereto.
Description
PM9~51 .P01 -~ 02199 687 DESCRIPTION
AIR TREATMENT APPARATUS FOR TRUCKS AND VEHICLES
AND METHOD OF ASSEMBLING AND SERVIClNG THE SAME
Technical Field This invention relates to vehicle air treatment systems, and methods for assembling and servicing a vehicle air llta.llllClll system improving accessibility to components of the vehicle.
Back~round Conventional vehicle air llt~allll~lll systems generally include an air handler for 10 selectively passing air, either fresh air or recirculated air, through a heat exchanger. The heat exchallgels typically include a heater core to heat the air supplied to the cab of the vehicle lespo~ e to one of Opel~tOI or automated control. These systems may also include an air conditioner evaporator core for cooling air supplied to the cab of the vehicle in response to operator or automated control.
The heater core and ~oldtor core are heat exchanger units which generally comprise one or more conduits. The heater core conduits and evaporator core conduits contain heat transfer fluid such as a coolant or refrigerant, respectively. The coolant may transfer heat from the engine to the air passing adjacent to the heater core. Evaporation of a refrigerant within the evaporator core absorbs heat thereby cooling air passing ~dj:lrent to the evaporator core. A plurality of tubes or fluid conduits provide fluid co"~".,ll~ rion of the heater core with the engine and the evaporator core with a compressor andcondenser.
The vehicle air ll~,alll~lll systems and vehicle engine must be periodically serviced and m~inr~inPd for proper pelrollllalue. It is often n-ocess~ry to remove the air treatment system to improve access to the components which require servicing. In the past, it has almost always been nPc~CSs~y to remove the refrigerant hoses or coolant hoses to perform this m~ n-~e. The hoses are usually removed from the l~e.;li~e heat exchanger during the servicing of a conventional air treatment system or HVAC unit. Such a procedure requires draining and recl~iming the refrigerant or coolant, pulling a vacuum and/or recharging the system. The coolant hose and refrigerant hose are usually clamped while the air treatment system is being serviced, however, some of the heat transfer fluid may spill.
Thus, there has rem~in.od a need for improving constructions and methods for accessing and servicing of vehicle air lreallnelll systems.
Brief De~. ;ption of the Drawin~
Preferred embodiments of the invention are described below with reference to theaccompanying drawings, which are briefly described below.
PA49~51 Po~ 9 9 6 8 7 Fig. 1 is a side elevational view of the air handler of the air treatment apparatus in accordance with the present invention mounted on the firewall of a vehicle.
Fig. 2 is a dia~lA~.,..,AIic representation of the air ~ledllllellt d~pdldlus in accordance with the present invention.
Fig. 3 is a block diagram of a processor coupled with components of the air treatment a~)~)dl dlUS .
Fig. 4 is a plan view of an embodiment of an air handler of the vehicle air lledllllellL
system in accordance with the present invention.
Fig. 5 is a right side elevational view of the air handler shown in Fig. 4.
0 Fig. 6 is a left side elevational view of the air handler shown in Fig. 4.
Fig. 7 is a rear view of the air handler shown in Fig. 4.
Fig. 8 is a cross-sectional view of the air handler taken along line 8-8 in Fig. 7.
Fig. 9 is a perspective view of an embodiment of an air distributor of the air handler according to the present invention.
Fig. 10 is a front view of the air handler shown in Fig. 4.
Fig. 11 is a plan view of the air handler shown in Fig. 4 with the heater core module and evaporator core module removed thc.~,rlulll.
SUMMARY EXPLANATION OF INVENTION FEATURES
To assist in undel~lA.,-l;"g and defining the present invention, the description in this section in~1irAt~s the various features of the present invention in dirrel~lll forms and manners of description. The novelty of the present invention comprises one or more of the features described either in this section, or according to the more detailed description given in the next section.
The present invention includes a vehicle air ~ nl~lll system preferably having an air handler mounted upon a firewall of the vehicle. The air handler includes at least one lellwv~ble heat exchanger module. Preferably, the air handler includes two removable heat exchanger mofl~ os. The heat exchanger modules may comprise a heater core module and an evdpo~dlor core module.
Responsive to A--t~m~t~ or operator control, the air handler willheat or cool either fresh air, or recirculated air from the passenger colll~llllc~lll. More specifically, the air handler selectively directs air a~jacPnt the heater core module to selectively heat the air applied to the passenger COlllpdl llllenl. In addition, the evaporator core module may selectively cool the air prior to delivery to the passenger compartment of the vehicle.
In accordance with the present invention, the heat exchanger modules are easily removable from the air handler unit to facilitate routine mAintenAnre of the air treatment KBFIPAT-PCIlAPP
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021 99 6~7 apparatus and other vehicle components. The fluid conduits may remain connected to a Ic~ecLive heat exchanger module of the air treatment apparatus during the removal of the heat exchanger module thererloll,.
Providing an air treatment apparatus in accol.lallce with the present invention 5 enabling such m~int~in~d connection of the fluid conduits to a respective heat exchanger module enables servicing without a need to reclaim a refrigerant or coolant heat transfer fluid, pull a vacuum, clamp the conduits, and/or recharge the system. In addition, m~int~ining the fluid conduits in continuous, closed communication with the heat exchanger modules reduces spills of the heat transfer fluid from the air treatment apparatus.
0 The present invention facilitates servicing of the air treatment d~paldlus itself and other cu~ one~Ls of the vehicle. These and additional advantages will become more appalc"L with ,crclc"ce to the detailed description of the preferred embodiments of the present invention below.
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-Best Modes for Carryin~ Out the Invention and Disclosure of Invention Listin~ of Subsections of Detailed Description and Pertinent Items with Refe~ =e Numerals and Pa~e Numbers Overview ...................................... 5 first chamber 92 ............ 9 air handler 22 .............................. 5 air filter 35 ............... 9 firewall 14 of a ............................ 5 orifice 50 .. ~ ............. 9 vehicle 10 .................................. 5 fan wall 94 ................. 9 p~5~ COIUlJ~lllt;lll 12 ................... 5 heater core module 24 ....................... 5 Air Distribution .............. 9 ~V~Oldlol core module 36 .................... 5 distribution valves 87, 88 .. 9 fluid conn~ction ports 27, 29 ............... 5 fluid port cormectors 26, 28 ................ 5 Removal of Heat Exchanger Modules From first and second fluid conduits 30, 32 ...... 5 The Air Handler ............. 10 engine 11 ................................... 5 ~ 52,54 ..................... 10 CU111~ O1 18 ................................ 5 orifices 48, 50 ............. 10 c~ .onc-or 17 ............................... 5 Chamber covers 25, 37 ....... 10 receiver dryer 19 ........................... 5 fluid conduits 4245 ......................... 5 Methods ....................... 11 ~*,al,~iOl~ valve 15 ........................ 6 fluid port co~e.;lor 38 ..................... 6 * * * (End of Table 1) * * *
fluid c~nn~ction port 39 ................... 6 fluid port co e~;~ol 40 ..................... 6 Auxiliary Air Handler ......................... 6 auxiliary air handler 21 .................... 6 Air Tn : ' System Control ..................... 6 ce;.sor 70 ................................ 6 plurality of actuators 60, 62, 89, 90 . . . 6 circulation fan 71 .......................... 6 l~ alul~ sensor 72 .......................... 6 le~1~1~U1~; sensor 72 ...................... 7 Ult; sensors 73 ........................ 7 air control valves 56, 58 ................... 7 actuators 60, 62 ............................ 7 operator controls 74 ........................ 7 Air Handler ................................... 7 access plate 75 ............................. 7 defrost port 86 ............................. 7 air ~ rihn~or 83 ............................ 7 primary drain conduit 67 .................... 7 ~econd~y drain conduit 68 ................... 7 fan chamber 93 .............................. 8 fresh air port 57 ........................... 8 recirculation entry port 81 ................. 8 flappers 82 ................................. 8 distribution ports 84, 85 ................... 8 Air Cooling and Heating ....................... 8 fresh air door 58 ........................... 8 PA49~51.POI O 2 1 9 9 6 8 7 Over~iew Referring in more detail to the drawings, Fig. 1 is a side elevational view illustrating the air handler 22 of the air lleallllelll apparatus mounted on a firewall 14 of a vehicle 10.
The air handler 22 is proximately located to the passenger compartment 12 for directing 5 treated air into said co,l,~a"",e"~ 12.
Fig.2 depicts the first and second heat exchanger modules within the air handler 22.
First and second heat exchanger modules may be referred to herein as heater core module 24 and evaporator core module 36, respectively. The heat exchanger modules 24, 36 each include a plurality of conduits for circulating a heat transfer fluid such as a coolant or 0 refrigerant throughout the respective module. Alternatively, the air handler 22 may include one heat exchanger module to provide one of heating or cooling of air delivered to the passenger c~""ya""~c"~ 12.
The heater core module 24 includes fluid connection ports 27, 29 on a front surface thereof in fluid co""~ tion with respective fluid port connectors 26, 28. The port 75 connectors 26, 28 are coupled with respective first and second fluid conduits 30, 32. The fluid conduits 30,32 are coupled with an engine coolant system which circulates coolant heat transfer fluid. The coolant heat transfer fluid may be utilized for heating air delivered to the passenger CU111~a1l111C;11~ 12.
More specifically, heat generated by the engine 11 of the vehicle 10 increases the 20 tel~ lalule of the coolant heat transfer fluid. The heated coolant heat transfer fluid is applied to the first heat exchanger module or heater core module 24 via fluid conduit 30, port connector 26 and fluid conn~ction port 27. The coolant heat transfer fluid is circulated throughout the heat exchanger module 24 via a plurality of conduits therein. Air ~ Pnr the heater core module 24 is heated and subsequently directed to the passenger 25 colll~ 12 responsive to operator or antom~ted control. The coolant heat transfer fluid exits the heater core module 24 via fluid connloction port 29, port connector 28 and is returned to the engine via fluid conduit 32.
The evaporator core module 36 of air handler 22 is coupled with a refrigerant compressor 18, a condenser 17 and receiver dryer 19 via a plurality of fluid collduil~ 4245.
30 Driven by the engine of the vehicle 10, the refrigerant compressor 18 draws the refrigerant heat transfer fluid from the second heat exchanger module or evaporator core module 36 via fluid conduit 44. Co",prcssor 18 ples~u,i~.e~ the vaporized refrigerant heat transfer fluid.
The p,~s~u~ized heat transfer fluid is applied via fluid conduit 45 to condenser 17 where the heat transfer fluid is pressurized cooled and liquified.
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~ 6 0 2 1 9 9 6 8 7 In liquid form, the heat transfer fluid is thelearlel applied via fluid conduit 43 to a receiver-dryer 19 which removes moisture from the refrigerant heat transfer fluid. Fluid conduit 42 couples the receiver-dryer 19 with an expansion valve 15 mounted to the evaporator core module 36. The liquefied refrigerant heat transfer fluid enters the 5 evaporator core module 36 via a fluid port connector 38 engageable with the expansion valve 15 and fluid connection port 39 within the front surface of module 36. The pleS~7Ule of the refrigerant heat transfer fluid is low within the evaporator core module 36 and the refrigerant heat transfer fluid returns to the gaseous state as it circulates throughout the evaporator core module 36. Such change from a liquid to a gas absorbs heat. Consequently, o air passing ~cljacen~ the evaporator core module 36 during such evaporation of the refrigerant is cooled and thereafter may be applied to the passenger compartment 12. The refrigerant heat transfer fluid is drawn out of the evaporator core module 36 via fluid connection port 41 and fluid port connector 40, through expansion valve 15 and fluid conduit 44 into the refrigerant colllpl~ssor 18. The circulation cycle is repeated while the ~5 colll~[essol clutch is engaged for cooling air delivered to the passenger colll~dlllllell~ 12 of the vehicle 10.
Auxiliary Air Handler The air Iredl~ lll apparatus in accordance with the present invention may include an auxiliary air handler 21. Auxiliary air handler 21 is utilized to adjust the ten~ lure of 20 air delivered to an auxiliary compartment, such as a sleeping coll~alllllent, of the vehicle 10.
Similar to air handler 22, auxiliary air handler preferably includes two heat exchanger modules for cooling or heating air delivered to the sleeping colll~ ent. A first heat exchanger module (heater core module) may be coupled with fluid conduits 30, 32 and a second heat exchanger module (evaporator core module) may be coupled with fluid conduits Z5 42, 44.
Air Treatment System Control Referring to Fig. 3, the vehicle air ll~,dllll~lll a~pdldlus 20 of the present invention includes a processor 70 for monitoring and controlling telll~ldlules within the passenger Colllj~dllll~ 12 of the vehicle 10. The processor 70 is coupled with a plurality of actuators 30 60, 62, 89, 90, circulation fan 71 and telllp~ldlllre sensor 72 within the air handler 22 for controlling air flow through the air handler 22 into the passenger col"pal~ nt 12.
The processor 70 is additionally coupled with the refrigerant compressor 18 for selective engagement and ~ Png~gement of the clutch therein responsive to operator or automatic control. Further, processor 70 monitors temperatures of the evaporator core 35 module 36. In particular, evaporator core module 36 is coupled with a temperature sensor ~BFIP.~Ir-~C71APP
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0 2 ~ 99 687 72 mounted a~ cPnf the evaporator core module 36 for monitoring the t~ LJelalul~ of the module 36. Processor 70 may automatically ~ Png~ge the refrigerant compressor clutch in response to a condition wherein the evaporator core module 36 approaches freezing temperatures.
The processor 70 is preferably coupled with temperature sensors 73 within the passenger compartment 12 and sleeping colll~ l (if present) of the vehicle 10.
Responsive to a change in lelll~el~lufe within the passenger or sleeping culll~all~..ent of the vehicle 10, processor 70 may control the circulation fan 71 and air control valves 56, 58 via actuators 60, 62 within the air handler 22 to m~int~in preset temperatures defined by the 0 operator controls 74. Alternatively, the vehicle operator may desire a change in air te~ laluie by adju~ g operator controls 74 within the passenger and sleeping colll~a~ ents of the vehicle 10. The operator controls 74 are coupled with processor 70 as shown in Fig.3. Therefore, processor 70 may either m~int~in a preset temperature or effect a change in temperature in response to operator adjustment of the manual operator control 74.
Air Handler A p.~r~lled embodiment of the air handler 22 of the vehicle air ll~d~lllellt apparatus 20 in accordance with the present invention is shown in Fig. 4 - Fig. 8. Referring to Fig. 4, the air handler 22 includes an access plate 75 mounted on an upper surface thereof 20 providing access to a circulation fan 71 which is preferably a centrifugal fan. Actuators 60, 62 for controlling air control valves 56, 58 within the air handler 22 are mounted within protective cases on the top surface of the air handler 22. Actuators 60, 62 rotate drive shafts provided through the top cover of the air handler 22 to rotate air control valves 56, 58 therein. Air control valves 56, 58 include a blend air door 56 and fresh air door 58 for 25 controlling and ~lh~,~,lillg treated air into the passenger cu",p~"",.,.,l 12 of the vehicle 10.
A defrost port 86 within the air distributor 83 is also shown toward the rear portion of the air handler 22. The defrost port 86 directs air toward the win-l~hiPId of the vehicle 10 during a defrost mode of operation. The expansion valve lS mounted to fluid port cormectors 38, 40 of the evaporator core module 36, and fluid port connectors 26, 28 of the heater core 30 module 24 are also shown in Fig. 4.
The right side of the air handler 22 is shown in Fig. S. A primary drain conduit 67 and secondary drain conduit 68 are coupled with the bottom with the air handler 22. The primary drain conduit 67 is coupled with a port beneath the evaporator core module 36.
Water con-lPn.~tion formed on the exterior of the evaporator core module 36 drips onto the 35 lower case of the air handler 22 and may be removed via primary drain conduit 67.
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Secondary drain conduit 68 is coupled with a port located beneath a chamber housing the circulation fan 71. Secondary drain 68 removes water con-len.~tion within the fan chamber 93 and is connected with the primary drain 67. Fluid port connectors 38, 40 are shown in Figure 5 Fig. 6 is a left side view of the air handler 22. The fresh air door 56 is shown in a first or recirculation air position. In particular, the fresh air door 58 is shown sealing a fresh air port 57. In this mode of operation, air is drawn from the passenger c~ pa~Llllent 12 through a recirculation entry port 81 positioned in the rear of the air handler 22.
Responsive to control signals from processor 70, actuator 62 may rotate fresh air door 58 into a second or fresh air position shown in Figure 8. In this second mode of operation air enters the air handler 22 through the fresh air port 57.
Fig.7 illustrates the rear portion of the air handler 22 in accordance with the present invention. Recirculation port 81 includes a plurality of flappers 82 positioned thereacross preventing recirculated air from entering the air handler 22 during the fresh air mode of 75 operation. During the recirculation mode of operation, flappers 82, which are constructed of a thin gasket material, open in response to a suction created by the circulation fan 71 thereby permitting recirculation air from the passenger colllpa~ ent to enter into the air handler 22. A portion of the air distributor 83 of the air handler 22 is shown in Fig. 7.
Air distributor 83 includes distribution ports 84, 85 for directing treated air into the 20 passenger colll~ 12 of the vehicle 10. Distribution port 84 directs air to the panel or dashboard level and port 85 directs air toward the floor of the passenger compartment 12.
Air Cooling and ~e~1ing Referring to Fig. 8, air handler 22 may selectively supply either heated air or cooled air to passenger culll~alllll~ 12 and may operate in either a fresh air mode or recirculation 2s mode. In particular, the air handler 22 includes a first air control valve, referred to as blend air door 56, for controllably delivering one of heated air and cooled air to the passenger colll~dlLlllt;nL 12 re~ ollsi~e to ~pe.~lol- or ~lltom~ted control. The air handler 22 may additionally include a second air control valve, referred to as fresh air door 58, for controllably delivering either fresh air or recirculated air to the passenger compartment 12 30 responsive to Op~,.dLOI or ~lltom~ted control.
As shown in Fig. 6, fresh air door 58 seals fresh air port 57 during the recirculation mode of operation. Circulation fan 71 draws recirculated air into the air handler 22 through recirculation port 81 and flappers 82. Alternatively, fresh air door 58 is opened during the fresh mode of operation as shown in Fig. 8. Opening fresh air door 58 permits air to flow 35 directly into air handler 22 through the fresh air port 57. Flappers 82 seal recirculation entry I~lFlPAT-PCllAPP
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._ port 81 during the fresh air operating mode. Either the vehicle operator or processor 70 may control the mode of operation of the fresh air door 56 via actuator 62.
Fig. 8 shows that air drawn into the air handler 22 through either the fresh air port 57 or recirculation entry port 81 initially passes into a first chamber 92. Thereafter, the air 5 iS drawn through air filter 35 and evaporator core module 36. Air filter 35 removes airborne particles and may be easily replaced through orifice 50 within the front of air handler 22 during the removal of the evaporator core module 36. The air is cooled by evaporator core module 36 if the compressor clutch is engaged responsive to a control signal from processor 70.
The air is subsequently drawn into circulation fan chamber 93 through orifices (not shown) located at the top and bottom of the fan wall 94. Circulation fan 71 directs the air toward second control valve referred to as blend air door 58. Blend air door 56 may be positioned as shown in Fig. 8 to block the flow of air through the heater core module 24 during a cooling mode of operation. In particular, the air is cooled by the evaporator core module 36 and by~asses the heater core module 24. The cooled air is thereafter applied to the air distributor 83 and the passenger c~ a"",e,ll 12 via a selected air distribution port 84, 85 or defrost port 86.
Alternatively, blend air door 56 may be positioned in a second position, represented by dashed lines shown in Fig.8, during a heating mode of operation. In the second position, blend air door 56 directs the air through the heater core module 24 thereby increasing the ~enl~e,alu~e of the air. The heated air is subsequently directed to the air distributor 83 and passenger co",~a,l",ent 12. The position of blend air door 56 may be varied between the first position and second position to provide vary the degree of heating of the air.
Air Di~t~ lion Referring to Fig. 7, panel and floor distributor ports 84, 85 of air distributor 83 are shown ~dj~ n~ the recirculation port 81. The upper air disl,il,,llion port 84 directs treated air into the passcng~ co~all~e~l 12 through the front panel therein. The lower air distribution 86 directs treated air toward the floor of the passenger compartment 12. As depicted in Fig. 4 and Fig. 9, defrost port 86 directs treated air toward the windshield of the vehicle 10.
Treated air is directed to the approp,iale distribution port 84, 85 and defrost port 86 by distribution valves 87, 88 shown in Figure 9. Distribution valves 87, 88 are rotated by respective actuators 89, 90 responsive to control signals from processor 70. The upelàlo~
may manually control or the processor 70 may automatically orient the positioning of distribution valves 87, 88 for directing the flow of air through distributor 83.
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lO 02199 687 The treated air first enters the lower portion of the air distributor 83. The first distribution valve 87 may be positioned in a first or upward position, perpendicular to the outward face of the air distributor 83 to direct air toward the floor of the passenger co~ ent 12 through distribution port 84. In a second position, the distribution valve 5 87 is flush with the outward surface of the air distributor 83 directing treated air upward toward distribution port 85 and defrost port 86. The distribution valve 87 is shown in Figure 9 hllc- Illr~liAte said first position and second position providing air to lower distribution port 84 and to defrost port 86.
The second distribution valve 88 directs the treated air through distribution port 85 o to the panel in the passenge. culll~a~ enl 12 when it is positioned in a first upward position, perpenllic~lAr to the outward surface of the air distribution system 83.
Alternatively, distribution valve 88 directs air toward the defrost port 86 when oriented in a second position flush with the outward surface of the air distribution system 83. The distribution valve 83 is shown in the second position in Figure 9. The positioning of distribution valves 87, 88 may be varied between the respective first and second positions thereof to sim~llt~nPously direct the treated air through more than one port 84, 85, 86.
.~1l of Heat FY-~h~nger Module~ From The Air ~r~l~r The first heat exchanger module or heater core module 24 and second heat exchanger module or ~apolator core module 36 are removably engageable with the air 20 handler 22. Heat exchanger modules 24, 36 may be quickly removed from the air handler 22 to f.r~ilit~t~ servicing and ,., ii,.l~,.~n~e of the components of the vehicle 10. The fluid conduits 30,32,42,44 may remain coupled with respective port connectors 26,28,38,40 and fluid connection ports 27, 29, 39, 41 during the removal of the heat exchanger modules 24, 36 from the air handler 22. ~Aint"ining the connections of the fluid conduits 30, 32, 42, 44 25 ~limin,~t.oc the need to collect and/or le~ al~e the heat transfer fluids, and reducing spillage of the fluids.
Air handler 22 includes chambers 52, 54 configured to receive a respective heater core module 24 or evaporator core module 36. The heat exchanger modules 24, 36 may be inserted through orifices 48, 50 in a front surface of the air handler 22 and slid into 30 receptacle cll~lll.,.~ 52, 54.
Chamber covers 25,37 are positioned to mAint~in the respective heater core module 24 and evaporator core module 36 within corresponding chalnb~ 52, 54 within the air handler 22. More specifically, heat exchanger cover 25 includes an upper portion and lower portion as shown in Fig. lO. Each portion of cover 25 may be slid vertically over orifice 48 35 to mr~intAin the heater core module 24 within chamber 52. Further, cover portions 25 may PA49-051 .POI
- 11 ~ ~ 1 9 9 6 8 7 be slid apart for removal of the cover 25 to permit access to ch;~ be~ 52 and heater core module 24 therein. Cover 37 may be slid horizontally to enclose chamber 54 m~int~ining evaporator core module 36 therein, or permit removal of the cover 37 allowing access to chamber 54 and evaporator core module 36.
Once servicing or m~intPn~nre is required, the covers 25, 37 may be removed and the heat exchanger modules 24, 36 slid outward from the ch~~ 52, 54 of the air handler 22. Preferably, fluid cullduil~ 30, 32, 42, 44 and fluid port connectors 26, 28, 38, 40 remain connPcted to fluid connection ports 27, 29, 39, 41 of heater core module 24 and evaporator core module 36 during the removal of the modules 24, 36. Thereafter, the heat exchanger mo~ ç.c 24, 36 may be remotely located facilitating access to the air handler 22 itself and other vehicle components. The heat exchanger modules 24, 36 may be reinserted into the Le~e~;live chd~ 52, 54 of the air handler 22 with the fluid conduits 30, 32, 42, 44 attached thereto when servicing is completed. Covers 25, 37 may be replaced to m~int~in the heat exchanger modules 24, 36 within the air handler 22. Therefore, the heater core module 24 and ~vd~olalor core module 36 may be removed from and reinserted into air handler 22 without disconnPcting fluid conduits 30, 32, 42, 44.
Fig.11 shows the heater core module 24 and the evaporator core module 36 removedfrom the air handler 22. Heater module cover 25 and evaporator module cover 37 may be removed from the orifices 48,50 of the front surface of the air handler 22 pellllil~ g access to the respective heat exchanger modules 24, 36 typically held within receptacle challlb~
52, 54.
Methods Additional aspects of this invention include novel methods of servicing and assembling a vehicle air Lledllllc;lll apparatus. The method of servicing the vehicle air Ll~allllelll apparatus includes the steps of removing a heat exchanger module from the air handler. ~n addition, the method m~int~inc the heat exchanger module in fluid comm-lnir~tion with a fluid conduit connected thereto during the steps of disconnPcting and removing. The heat exchanger is freed by releasing the mo-llllP~ from the air handler, such as by removing the cover 37. The heat exchanger modules can then be moved in a removing step so as to be removed clear of the airhandler. This allowsm~ e~ re ofthe airhandler without disconnPcting the fluid conduit from the heat exchanger module and draining the refrigerant or coolant heat transfer fluid from the respective heat exchanger module. The mPtho-lc may further include the step of removing the cover prior to removing the heat exchanger module.
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0 2 1 g 9 6 8 7 The method for assembling the vehicle air tlcdllllclll apparatus in accordance with the present invention includes the steps of coupling a fluid conduit to a heat exchanger module and connPcting the heat exchanger module to the air handler such that air is passed a~ rPnt to the heat exchanger module to affect the t~lllperdlule of the air. The heat 5 exchanger module is removable from the air handler with the fluid conduit coupled to the heat exchanger module. The methods can further include the step of supplying a heat transfer fluid to the heat exchanger module via the fluid conduit. In addition, the colmecting step preferably includes sliding the heat exchanger module into a receptacle chamber within the air handler. The methods can further include securing the modules, such as by using a 10 cover which may be installed a~1ja~Pnt to the chamber to m~int~in said heat exchanger module within said air handler.
The invention has been described in language more or less specific as to structural, methodological, or other aspects and features. It is to be more properly understood that the invention is not nPcess~rily limited to the specific forms shown and described. Other equivalent structures and features may also be within the inventive concepts which are ~pl~,pliately protected under the grant of patent rights being sought. The invention is Lll~l~rore being claimed in an effort to define the invention but the various forms or modifications which the invention may take is difficult or impossible to define with certainty.
J~ gmPnt must be utilized to propelly intelplet the scope of protection which is to be 20 a~lopliately applied with regard to these new and inventive concepts.
Industrial ApplicabilitY
The invention is useful in the design, m~mlf~rtllre and servicing of vehicles, particularly trucks, buses and other larger sized vehicles.
AIR TREATMENT APPARATUS FOR TRUCKS AND VEHICLES
AND METHOD OF ASSEMBLING AND SERVIClNG THE SAME
Technical Field This invention relates to vehicle air treatment systems, and methods for assembling and servicing a vehicle air llta.llllClll system improving accessibility to components of the vehicle.
Back~round Conventional vehicle air llt~allll~lll systems generally include an air handler for 10 selectively passing air, either fresh air or recirculated air, through a heat exchanger. The heat exchallgels typically include a heater core to heat the air supplied to the cab of the vehicle lespo~ e to one of Opel~tOI or automated control. These systems may also include an air conditioner evaporator core for cooling air supplied to the cab of the vehicle in response to operator or automated control.
The heater core and ~oldtor core are heat exchanger units which generally comprise one or more conduits. The heater core conduits and evaporator core conduits contain heat transfer fluid such as a coolant or refrigerant, respectively. The coolant may transfer heat from the engine to the air passing adjacent to the heater core. Evaporation of a refrigerant within the evaporator core absorbs heat thereby cooling air passing ~dj:lrent to the evaporator core. A plurality of tubes or fluid conduits provide fluid co"~".,ll~ rion of the heater core with the engine and the evaporator core with a compressor andcondenser.
The vehicle air ll~,alll~lll systems and vehicle engine must be periodically serviced and m~inr~inPd for proper pelrollllalue. It is often n-ocess~ry to remove the air treatment system to improve access to the components which require servicing. In the past, it has almost always been nPc~CSs~y to remove the refrigerant hoses or coolant hoses to perform this m~ n-~e. The hoses are usually removed from the l~e.;li~e heat exchanger during the servicing of a conventional air treatment system or HVAC unit. Such a procedure requires draining and recl~iming the refrigerant or coolant, pulling a vacuum and/or recharging the system. The coolant hose and refrigerant hose are usually clamped while the air treatment system is being serviced, however, some of the heat transfer fluid may spill.
Thus, there has rem~in.od a need for improving constructions and methods for accessing and servicing of vehicle air lreallnelll systems.
Brief De~. ;ption of the Drawin~
Preferred embodiments of the invention are described below with reference to theaccompanying drawings, which are briefly described below.
PA49~51 Po~ 9 9 6 8 7 Fig. 1 is a side elevational view of the air handler of the air treatment apparatus in accordance with the present invention mounted on the firewall of a vehicle.
Fig. 2 is a dia~lA~.,..,AIic representation of the air ~ledllllellt d~pdldlus in accordance with the present invention.
Fig. 3 is a block diagram of a processor coupled with components of the air treatment a~)~)dl dlUS .
Fig. 4 is a plan view of an embodiment of an air handler of the vehicle air lledllllellL
system in accordance with the present invention.
Fig. 5 is a right side elevational view of the air handler shown in Fig. 4.
0 Fig. 6 is a left side elevational view of the air handler shown in Fig. 4.
Fig. 7 is a rear view of the air handler shown in Fig. 4.
Fig. 8 is a cross-sectional view of the air handler taken along line 8-8 in Fig. 7.
Fig. 9 is a perspective view of an embodiment of an air distributor of the air handler according to the present invention.
Fig. 10 is a front view of the air handler shown in Fig. 4.
Fig. 11 is a plan view of the air handler shown in Fig. 4 with the heater core module and evaporator core module removed thc.~,rlulll.
SUMMARY EXPLANATION OF INVENTION FEATURES
To assist in undel~lA.,-l;"g and defining the present invention, the description in this section in~1irAt~s the various features of the present invention in dirrel~lll forms and manners of description. The novelty of the present invention comprises one or more of the features described either in this section, or according to the more detailed description given in the next section.
The present invention includes a vehicle air ~ nl~lll system preferably having an air handler mounted upon a firewall of the vehicle. The air handler includes at least one lellwv~ble heat exchanger module. Preferably, the air handler includes two removable heat exchanger mofl~ os. The heat exchanger modules may comprise a heater core module and an evdpo~dlor core module.
Responsive to A--t~m~t~ or operator control, the air handler willheat or cool either fresh air, or recirculated air from the passenger colll~llllc~lll. More specifically, the air handler selectively directs air a~jacPnt the heater core module to selectively heat the air applied to the passenger COlllpdl llllenl. In addition, the evaporator core module may selectively cool the air prior to delivery to the passenger compartment of the vehicle.
In accordance with the present invention, the heat exchanger modules are easily removable from the air handler unit to facilitate routine mAintenAnre of the air treatment KBFIPAT-PCIlAPP
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021 99 6~7 apparatus and other vehicle components. The fluid conduits may remain connected to a Ic~ecLive heat exchanger module of the air treatment apparatus during the removal of the heat exchanger module thererloll,.
Providing an air treatment apparatus in accol.lallce with the present invention 5 enabling such m~int~in~d connection of the fluid conduits to a respective heat exchanger module enables servicing without a need to reclaim a refrigerant or coolant heat transfer fluid, pull a vacuum, clamp the conduits, and/or recharge the system. In addition, m~int~ining the fluid conduits in continuous, closed communication with the heat exchanger modules reduces spills of the heat transfer fluid from the air treatment apparatus.
0 The present invention facilitates servicing of the air treatment d~paldlus itself and other cu~ one~Ls of the vehicle. These and additional advantages will become more appalc"L with ,crclc"ce to the detailed description of the preferred embodiments of the present invention below.
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-Best Modes for Carryin~ Out the Invention and Disclosure of Invention Listin~ of Subsections of Detailed Description and Pertinent Items with Refe~ =e Numerals and Pa~e Numbers Overview ...................................... 5 first chamber 92 ............ 9 air handler 22 .............................. 5 air filter 35 ............... 9 firewall 14 of a ............................ 5 orifice 50 .. ~ ............. 9 vehicle 10 .................................. 5 fan wall 94 ................. 9 p~5~ COIUlJ~lllt;lll 12 ................... 5 heater core module 24 ....................... 5 Air Distribution .............. 9 ~V~Oldlol core module 36 .................... 5 distribution valves 87, 88 .. 9 fluid conn~ction ports 27, 29 ............... 5 fluid port cormectors 26, 28 ................ 5 Removal of Heat Exchanger Modules From first and second fluid conduits 30, 32 ...... 5 The Air Handler ............. 10 engine 11 ................................... 5 ~ 52,54 ..................... 10 CU111~ O1 18 ................................ 5 orifices 48, 50 ............. 10 c~ .onc-or 17 ............................... 5 Chamber covers 25, 37 ....... 10 receiver dryer 19 ........................... 5 fluid conduits 4245 ......................... 5 Methods ....................... 11 ~*,al,~iOl~ valve 15 ........................ 6 fluid port co~e.;lor 38 ..................... 6 * * * (End of Table 1) * * *
fluid c~nn~ction port 39 ................... 6 fluid port co e~;~ol 40 ..................... 6 Auxiliary Air Handler ......................... 6 auxiliary air handler 21 .................... 6 Air Tn : ' System Control ..................... 6 ce;.sor 70 ................................ 6 plurality of actuators 60, 62, 89, 90 . . . 6 circulation fan 71 .......................... 6 l~ alul~ sensor 72 .......................... 6 le~1~1~U1~; sensor 72 ...................... 7 Ult; sensors 73 ........................ 7 air control valves 56, 58 ................... 7 actuators 60, 62 ............................ 7 operator controls 74 ........................ 7 Air Handler ................................... 7 access plate 75 ............................. 7 defrost port 86 ............................. 7 air ~ rihn~or 83 ............................ 7 primary drain conduit 67 .................... 7 ~econd~y drain conduit 68 ................... 7 fan chamber 93 .............................. 8 fresh air port 57 ........................... 8 recirculation entry port 81 ................. 8 flappers 82 ................................. 8 distribution ports 84, 85 ................... 8 Air Cooling and Heating ....................... 8 fresh air door 58 ........................... 8 PA49~51.POI O 2 1 9 9 6 8 7 Over~iew Referring in more detail to the drawings, Fig. 1 is a side elevational view illustrating the air handler 22 of the air lleallllelll apparatus mounted on a firewall 14 of a vehicle 10.
The air handler 22 is proximately located to the passenger compartment 12 for directing 5 treated air into said co,l,~a"",e"~ 12.
Fig.2 depicts the first and second heat exchanger modules within the air handler 22.
First and second heat exchanger modules may be referred to herein as heater core module 24 and evaporator core module 36, respectively. The heat exchanger modules 24, 36 each include a plurality of conduits for circulating a heat transfer fluid such as a coolant or 0 refrigerant throughout the respective module. Alternatively, the air handler 22 may include one heat exchanger module to provide one of heating or cooling of air delivered to the passenger c~""ya""~c"~ 12.
The heater core module 24 includes fluid connection ports 27, 29 on a front surface thereof in fluid co""~ tion with respective fluid port connectors 26, 28. The port 75 connectors 26, 28 are coupled with respective first and second fluid conduits 30, 32. The fluid conduits 30,32 are coupled with an engine coolant system which circulates coolant heat transfer fluid. The coolant heat transfer fluid may be utilized for heating air delivered to the passenger CU111~a1l111C;11~ 12.
More specifically, heat generated by the engine 11 of the vehicle 10 increases the 20 tel~ lalule of the coolant heat transfer fluid. The heated coolant heat transfer fluid is applied to the first heat exchanger module or heater core module 24 via fluid conduit 30, port connector 26 and fluid conn~ction port 27. The coolant heat transfer fluid is circulated throughout the heat exchanger module 24 via a plurality of conduits therein. Air ~ Pnr the heater core module 24 is heated and subsequently directed to the passenger 25 colll~ 12 responsive to operator or antom~ted control. The coolant heat transfer fluid exits the heater core module 24 via fluid connloction port 29, port connector 28 and is returned to the engine via fluid conduit 32.
The evaporator core module 36 of air handler 22 is coupled with a refrigerant compressor 18, a condenser 17 and receiver dryer 19 via a plurality of fluid collduil~ 4245.
30 Driven by the engine of the vehicle 10, the refrigerant compressor 18 draws the refrigerant heat transfer fluid from the second heat exchanger module or evaporator core module 36 via fluid conduit 44. Co",prcssor 18 ples~u,i~.e~ the vaporized refrigerant heat transfer fluid.
The p,~s~u~ized heat transfer fluid is applied via fluid conduit 45 to condenser 17 where the heat transfer fluid is pressurized cooled and liquified.
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~ 6 0 2 1 9 9 6 8 7 In liquid form, the heat transfer fluid is thelearlel applied via fluid conduit 43 to a receiver-dryer 19 which removes moisture from the refrigerant heat transfer fluid. Fluid conduit 42 couples the receiver-dryer 19 with an expansion valve 15 mounted to the evaporator core module 36. The liquefied refrigerant heat transfer fluid enters the 5 evaporator core module 36 via a fluid port connector 38 engageable with the expansion valve 15 and fluid connection port 39 within the front surface of module 36. The pleS~7Ule of the refrigerant heat transfer fluid is low within the evaporator core module 36 and the refrigerant heat transfer fluid returns to the gaseous state as it circulates throughout the evaporator core module 36. Such change from a liquid to a gas absorbs heat. Consequently, o air passing ~cljacen~ the evaporator core module 36 during such evaporation of the refrigerant is cooled and thereafter may be applied to the passenger compartment 12. The refrigerant heat transfer fluid is drawn out of the evaporator core module 36 via fluid connection port 41 and fluid port connector 40, through expansion valve 15 and fluid conduit 44 into the refrigerant colllpl~ssor 18. The circulation cycle is repeated while the ~5 colll~[essol clutch is engaged for cooling air delivered to the passenger colll~dlllllell~ 12 of the vehicle 10.
Auxiliary Air Handler The air Iredl~ lll apparatus in accordance with the present invention may include an auxiliary air handler 21. Auxiliary air handler 21 is utilized to adjust the ten~ lure of 20 air delivered to an auxiliary compartment, such as a sleeping coll~alllllent, of the vehicle 10.
Similar to air handler 22, auxiliary air handler preferably includes two heat exchanger modules for cooling or heating air delivered to the sleeping colll~ ent. A first heat exchanger module (heater core module) may be coupled with fluid conduits 30, 32 and a second heat exchanger module (evaporator core module) may be coupled with fluid conduits Z5 42, 44.
Air Treatment System Control Referring to Fig. 3, the vehicle air ll~,dllll~lll a~pdldlus 20 of the present invention includes a processor 70 for monitoring and controlling telll~ldlules within the passenger Colllj~dllll~ 12 of the vehicle 10. The processor 70 is coupled with a plurality of actuators 30 60, 62, 89, 90, circulation fan 71 and telllp~ldlllre sensor 72 within the air handler 22 for controlling air flow through the air handler 22 into the passenger col"pal~ nt 12.
The processor 70 is additionally coupled with the refrigerant compressor 18 for selective engagement and ~ Png~gement of the clutch therein responsive to operator or automatic control. Further, processor 70 monitors temperatures of the evaporator core 35 module 36. In particular, evaporator core module 36 is coupled with a temperature sensor ~BFIP.~Ir-~C71APP
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0 2 ~ 99 687 72 mounted a~ cPnf the evaporator core module 36 for monitoring the t~ LJelalul~ of the module 36. Processor 70 may automatically ~ Png~ge the refrigerant compressor clutch in response to a condition wherein the evaporator core module 36 approaches freezing temperatures.
The processor 70 is preferably coupled with temperature sensors 73 within the passenger compartment 12 and sleeping colll~ l (if present) of the vehicle 10.
Responsive to a change in lelll~el~lufe within the passenger or sleeping culll~all~..ent of the vehicle 10, processor 70 may control the circulation fan 71 and air control valves 56, 58 via actuators 60, 62 within the air handler 22 to m~int~in preset temperatures defined by the 0 operator controls 74. Alternatively, the vehicle operator may desire a change in air te~ laluie by adju~ g operator controls 74 within the passenger and sleeping colll~a~ ents of the vehicle 10. The operator controls 74 are coupled with processor 70 as shown in Fig.3. Therefore, processor 70 may either m~int~in a preset temperature or effect a change in temperature in response to operator adjustment of the manual operator control 74.
Air Handler A p.~r~lled embodiment of the air handler 22 of the vehicle air ll~d~lllellt apparatus 20 in accordance with the present invention is shown in Fig. 4 - Fig. 8. Referring to Fig. 4, the air handler 22 includes an access plate 75 mounted on an upper surface thereof 20 providing access to a circulation fan 71 which is preferably a centrifugal fan. Actuators 60, 62 for controlling air control valves 56, 58 within the air handler 22 are mounted within protective cases on the top surface of the air handler 22. Actuators 60, 62 rotate drive shafts provided through the top cover of the air handler 22 to rotate air control valves 56, 58 therein. Air control valves 56, 58 include a blend air door 56 and fresh air door 58 for 25 controlling and ~lh~,~,lillg treated air into the passenger cu",p~"",.,.,l 12 of the vehicle 10.
A defrost port 86 within the air distributor 83 is also shown toward the rear portion of the air handler 22. The defrost port 86 directs air toward the win-l~hiPId of the vehicle 10 during a defrost mode of operation. The expansion valve lS mounted to fluid port cormectors 38, 40 of the evaporator core module 36, and fluid port connectors 26, 28 of the heater core 30 module 24 are also shown in Fig. 4.
The right side of the air handler 22 is shown in Fig. S. A primary drain conduit 67 and secondary drain conduit 68 are coupled with the bottom with the air handler 22. The primary drain conduit 67 is coupled with a port beneath the evaporator core module 36.
Water con-lPn.~tion formed on the exterior of the evaporator core module 36 drips onto the 35 lower case of the air handler 22 and may be removed via primary drain conduit 67.
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Secondary drain conduit 68 is coupled with a port located beneath a chamber housing the circulation fan 71. Secondary drain 68 removes water con-len.~tion within the fan chamber 93 and is connected with the primary drain 67. Fluid port connectors 38, 40 are shown in Figure 5 Fig. 6 is a left side view of the air handler 22. The fresh air door 56 is shown in a first or recirculation air position. In particular, the fresh air door 58 is shown sealing a fresh air port 57. In this mode of operation, air is drawn from the passenger c~ pa~Llllent 12 through a recirculation entry port 81 positioned in the rear of the air handler 22.
Responsive to control signals from processor 70, actuator 62 may rotate fresh air door 58 into a second or fresh air position shown in Figure 8. In this second mode of operation air enters the air handler 22 through the fresh air port 57.
Fig.7 illustrates the rear portion of the air handler 22 in accordance with the present invention. Recirculation port 81 includes a plurality of flappers 82 positioned thereacross preventing recirculated air from entering the air handler 22 during the fresh air mode of 75 operation. During the recirculation mode of operation, flappers 82, which are constructed of a thin gasket material, open in response to a suction created by the circulation fan 71 thereby permitting recirculation air from the passenger colllpa~ ent to enter into the air handler 22. A portion of the air distributor 83 of the air handler 22 is shown in Fig. 7.
Air distributor 83 includes distribution ports 84, 85 for directing treated air into the 20 passenger colll~ 12 of the vehicle 10. Distribution port 84 directs air to the panel or dashboard level and port 85 directs air toward the floor of the passenger compartment 12.
Air Cooling and ~e~1ing Referring to Fig. 8, air handler 22 may selectively supply either heated air or cooled air to passenger culll~alllll~ 12 and may operate in either a fresh air mode or recirculation 2s mode. In particular, the air handler 22 includes a first air control valve, referred to as blend air door 56, for controllably delivering one of heated air and cooled air to the passenger colll~dlLlllt;nL 12 re~ ollsi~e to ~pe.~lol- or ~lltom~ted control. The air handler 22 may additionally include a second air control valve, referred to as fresh air door 58, for controllably delivering either fresh air or recirculated air to the passenger compartment 12 30 responsive to Op~,.dLOI or ~lltom~ted control.
As shown in Fig. 6, fresh air door 58 seals fresh air port 57 during the recirculation mode of operation. Circulation fan 71 draws recirculated air into the air handler 22 through recirculation port 81 and flappers 82. Alternatively, fresh air door 58 is opened during the fresh mode of operation as shown in Fig. 8. Opening fresh air door 58 permits air to flow 35 directly into air handler 22 through the fresh air port 57. Flappers 82 seal recirculation entry I~lFlPAT-PCllAPP
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._ port 81 during the fresh air operating mode. Either the vehicle operator or processor 70 may control the mode of operation of the fresh air door 56 via actuator 62.
Fig. 8 shows that air drawn into the air handler 22 through either the fresh air port 57 or recirculation entry port 81 initially passes into a first chamber 92. Thereafter, the air 5 iS drawn through air filter 35 and evaporator core module 36. Air filter 35 removes airborne particles and may be easily replaced through orifice 50 within the front of air handler 22 during the removal of the evaporator core module 36. The air is cooled by evaporator core module 36 if the compressor clutch is engaged responsive to a control signal from processor 70.
The air is subsequently drawn into circulation fan chamber 93 through orifices (not shown) located at the top and bottom of the fan wall 94. Circulation fan 71 directs the air toward second control valve referred to as blend air door 58. Blend air door 56 may be positioned as shown in Fig. 8 to block the flow of air through the heater core module 24 during a cooling mode of operation. In particular, the air is cooled by the evaporator core module 36 and by~asses the heater core module 24. The cooled air is thereafter applied to the air distributor 83 and the passenger c~ a"",e,ll 12 via a selected air distribution port 84, 85 or defrost port 86.
Alternatively, blend air door 56 may be positioned in a second position, represented by dashed lines shown in Fig.8, during a heating mode of operation. In the second position, blend air door 56 directs the air through the heater core module 24 thereby increasing the ~enl~e,alu~e of the air. The heated air is subsequently directed to the air distributor 83 and passenger co",~a,l",ent 12. The position of blend air door 56 may be varied between the first position and second position to provide vary the degree of heating of the air.
Air Di~t~ lion Referring to Fig. 7, panel and floor distributor ports 84, 85 of air distributor 83 are shown ~dj~ n~ the recirculation port 81. The upper air disl,il,,llion port 84 directs treated air into the passcng~ co~all~e~l 12 through the front panel therein. The lower air distribution 86 directs treated air toward the floor of the passenger compartment 12. As depicted in Fig. 4 and Fig. 9, defrost port 86 directs treated air toward the windshield of the vehicle 10.
Treated air is directed to the approp,iale distribution port 84, 85 and defrost port 86 by distribution valves 87, 88 shown in Figure 9. Distribution valves 87, 88 are rotated by respective actuators 89, 90 responsive to control signals from processor 70. The upelàlo~
may manually control or the processor 70 may automatically orient the positioning of distribution valves 87, 88 for directing the flow of air through distributor 83.
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lO 02199 687 The treated air first enters the lower portion of the air distributor 83. The first distribution valve 87 may be positioned in a first or upward position, perpendicular to the outward face of the air distributor 83 to direct air toward the floor of the passenger co~ ent 12 through distribution port 84. In a second position, the distribution valve 5 87 is flush with the outward surface of the air distributor 83 directing treated air upward toward distribution port 85 and defrost port 86. The distribution valve 87 is shown in Figure 9 hllc- Illr~liAte said first position and second position providing air to lower distribution port 84 and to defrost port 86.
The second distribution valve 88 directs the treated air through distribution port 85 o to the panel in the passenge. culll~a~ enl 12 when it is positioned in a first upward position, perpenllic~lAr to the outward surface of the air distribution system 83.
Alternatively, distribution valve 88 directs air toward the defrost port 86 when oriented in a second position flush with the outward surface of the air distribution system 83. The distribution valve 83 is shown in the second position in Figure 9. The positioning of distribution valves 87, 88 may be varied between the respective first and second positions thereof to sim~llt~nPously direct the treated air through more than one port 84, 85, 86.
.~1l of Heat FY-~h~nger Module~ From The Air ~r~l~r The first heat exchanger module or heater core module 24 and second heat exchanger module or ~apolator core module 36 are removably engageable with the air 20 handler 22. Heat exchanger modules 24, 36 may be quickly removed from the air handler 22 to f.r~ilit~t~ servicing and ,., ii,.l~,.~n~e of the components of the vehicle 10. The fluid conduits 30,32,42,44 may remain coupled with respective port connectors 26,28,38,40 and fluid connection ports 27, 29, 39, 41 during the removal of the heat exchanger modules 24, 36 from the air handler 22. ~Aint"ining the connections of the fluid conduits 30, 32, 42, 44 25 ~limin,~t.oc the need to collect and/or le~ al~e the heat transfer fluids, and reducing spillage of the fluids.
Air handler 22 includes chambers 52, 54 configured to receive a respective heater core module 24 or evaporator core module 36. The heat exchanger modules 24, 36 may be inserted through orifices 48, 50 in a front surface of the air handler 22 and slid into 30 receptacle cll~lll.,.~ 52, 54.
Chamber covers 25,37 are positioned to mAint~in the respective heater core module 24 and evaporator core module 36 within corresponding chalnb~ 52, 54 within the air handler 22. More specifically, heat exchanger cover 25 includes an upper portion and lower portion as shown in Fig. lO. Each portion of cover 25 may be slid vertically over orifice 48 35 to mr~intAin the heater core module 24 within chamber 52. Further, cover portions 25 may PA49-051 .POI
- 11 ~ ~ 1 9 9 6 8 7 be slid apart for removal of the cover 25 to permit access to ch;~ be~ 52 and heater core module 24 therein. Cover 37 may be slid horizontally to enclose chamber 54 m~int~ining evaporator core module 36 therein, or permit removal of the cover 37 allowing access to chamber 54 and evaporator core module 36.
Once servicing or m~intPn~nre is required, the covers 25, 37 may be removed and the heat exchanger modules 24, 36 slid outward from the ch~~ 52, 54 of the air handler 22. Preferably, fluid cullduil~ 30, 32, 42, 44 and fluid port connectors 26, 28, 38, 40 remain connPcted to fluid connection ports 27, 29, 39, 41 of heater core module 24 and evaporator core module 36 during the removal of the modules 24, 36. Thereafter, the heat exchanger mo~ ç.c 24, 36 may be remotely located facilitating access to the air handler 22 itself and other vehicle components. The heat exchanger modules 24, 36 may be reinserted into the Le~e~;live chd~ 52, 54 of the air handler 22 with the fluid conduits 30, 32, 42, 44 attached thereto when servicing is completed. Covers 25, 37 may be replaced to m~int~in the heat exchanger modules 24, 36 within the air handler 22. Therefore, the heater core module 24 and ~vd~olalor core module 36 may be removed from and reinserted into air handler 22 without disconnPcting fluid conduits 30, 32, 42, 44.
Fig.11 shows the heater core module 24 and the evaporator core module 36 removedfrom the air handler 22. Heater module cover 25 and evaporator module cover 37 may be removed from the orifices 48,50 of the front surface of the air handler 22 pellllil~ g access to the respective heat exchanger modules 24, 36 typically held within receptacle challlb~
52, 54.
Methods Additional aspects of this invention include novel methods of servicing and assembling a vehicle air Lledllllc;lll apparatus. The method of servicing the vehicle air Ll~allllelll apparatus includes the steps of removing a heat exchanger module from the air handler. ~n addition, the method m~int~inc the heat exchanger module in fluid comm-lnir~tion with a fluid conduit connected thereto during the steps of disconnPcting and removing. The heat exchanger is freed by releasing the mo-llllP~ from the air handler, such as by removing the cover 37. The heat exchanger modules can then be moved in a removing step so as to be removed clear of the airhandler. This allowsm~ e~ re ofthe airhandler without disconnPcting the fluid conduit from the heat exchanger module and draining the refrigerant or coolant heat transfer fluid from the respective heat exchanger module. The mPtho-lc may further include the step of removing the cover prior to removing the heat exchanger module.
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0 2 1 g 9 6 8 7 The method for assembling the vehicle air tlcdllllclll apparatus in accordance with the present invention includes the steps of coupling a fluid conduit to a heat exchanger module and connPcting the heat exchanger module to the air handler such that air is passed a~ rPnt to the heat exchanger module to affect the t~lllperdlule of the air. The heat 5 exchanger module is removable from the air handler with the fluid conduit coupled to the heat exchanger module. The methods can further include the step of supplying a heat transfer fluid to the heat exchanger module via the fluid conduit. In addition, the colmecting step preferably includes sliding the heat exchanger module into a receptacle chamber within the air handler. The methods can further include securing the modules, such as by using a 10 cover which may be installed a~1ja~Pnt to the chamber to m~int~in said heat exchanger module within said air handler.
The invention has been described in language more or less specific as to structural, methodological, or other aspects and features. It is to be more properly understood that the invention is not nPcess~rily limited to the specific forms shown and described. Other equivalent structures and features may also be within the inventive concepts which are ~pl~,pliately protected under the grant of patent rights being sought. The invention is Lll~l~rore being claimed in an effort to define the invention but the various forms or modifications which the invention may take is difficult or impossible to define with certainty.
J~ gmPnt must be utilized to propelly intelplet the scope of protection which is to be 20 a~lopliately applied with regard to these new and inventive concepts.
Industrial ApplicabilitY
The invention is useful in the design, m~mlf~rtllre and servicing of vehicles, particularly trucks, buses and other larger sized vehicles.
Claims (16)
1. A vehicle air treatment apparatus for adjusting the temperature of air delivered to a passenger compartment of a vehicle, comprising:
an air handler connected to said vehicle for controllably delivering air to saidpassenger compartment;
at least one heat exchanger module removably coupled with said air handler such that the air is passed adjacent said at least one heat exchanger module to affect the temperature of the air;
said at least one heat exchanger module having a fluid connection port engageable with a fluid conduit for receiving a heat transfer fluid therefrom;
said at least one heat exchanger module being removable from said air handler with said fluid connection port coupled with the fluid conduit.
an air handler connected to said vehicle for controllably delivering air to saidpassenger compartment;
at least one heat exchanger module removably coupled with said air handler such that the air is passed adjacent said at least one heat exchanger module to affect the temperature of the air;
said at least one heat exchanger module having a fluid connection port engageable with a fluid conduit for receiving a heat transfer fluid therefrom;
said at least one heat exchanger module being removable from said air handler with said fluid connection port coupled with the fluid conduit.
2. A vehicle air treatment apparatus according to claim 1 wherein said at least one heat exchanger module is slidably engageable with said air handler.
3. A vehicle air treatment apparatus according to claim 1 wherein said air handler includes at least one orifice on a front surface thereof for receiving said at least one heat exchanger module.
4. A vehicle air treatment apparatus according to claim 1 further comprising at least one cover for maintaining said at least one heat exchanger module within said air handler.
5. A vehicle air treatment apparatus according to claim 1 wherein said fluid connection port passes through a front surface of said at least one heat exchanger module.
6. A vehicle air treatment apparatus according to claim 1 wherein said air handler includes at least one air control valve for controlling delivery of fresh air or recirculated air to said passenger compartment.
7. A vehicle air treatment apparatus according to claim 1 wherein the heat transfer fluid is a coolant heat transfer fluid for increasing the temperature of the air.
8. A vehicle air treatment apparatus according to claim 1 wherein the heat transfer fluid is a refrigerant heat transfer fluid for reducing the temperature of the air.
9. A vehicle air treatment apparatus according to claim 1 wherein there are at least two heat exchanger modules, including a heater core module for selectably increasing the temperature of the air and an evaporator core module for selectably decreasing the temperature of the air.
10. A vehicle air treatment apparatus according to claim 9 wherein each of said heat exchanger modules is slidably engageable with said air handler.
11. A vehicle air treatment apparatus according to claim 9 wherein said air handler includes a first orifice and a second orifice on a front surface thereof for receiving respective ones of said heater core module and said evaporator core module.
12. A vehicle air treatment apparatus according to claim 9 wherein each said heater core module and said evaporator core module each include said fluid connection port through a respective front surface thereof.
13. A vehicle air treatment apparatus according to claim 9 further comprising a first cover and a second cover for maintaining respective ones of said heater core module and said evaporator core module within said air handler.
14. A vehicle air treatment apparatus according to claim 9 wherein said air handler includes:
a first air control valve for controllably delivering one of heated air and cooled air to said passenger compartment;
a second air control valve for controllably delivering one of fresh air and recirculated air to said passenger compartment.
a first air control valve for controllably delivering one of heated air and cooled air to said passenger compartment;
a second air control valve for controllably delivering one of fresh air and recirculated air to said passenger compartment.
15. A vehicle air treatment apparatus according to claim 9 wherein the heat transfer fluid within said heater core module is a coolant heat transfer fluid for increasing the temperature of the air and the heat transfer fluid within said evaporator core module is a refrigerant heat transfer fluid for reducing the temperature of the air.
16. A vehicle air treatment apparatus for adjusting the temperature of air delivered to a passenger compartment of a vehicle, comprising:
an air handler connected to said vehicle for controllably delivering air to the passenger compartment;
at least one heat exchanger module removably coupled with said air handler such that the air is passed adjacent said at least one heat exchanger module to affect the temperature of the air;
said at least one heat exchanger module having a fluid connection port engageable with a fluid conduit for receiving a heat transfer fluid therefrom;
whereby said at least one heat exchanger module can be removed from said air handler without disconnecting the fluid conduit from said fluid connection port.17. A vehicle air treatment apparatus according to claim 16 wherein said at least one heat exchanger module is slidably engageable with said air handler.
18. A vehicle air treatment apparatus according to claim 16 wherein said air handler includes at least one orifice on a front surface thereof for receiving said at least one heat exchanger module.
19. A vehicle air treatment apparatus according to claim 16 further comprisingat least one cover for maintaining said at least one heat exchanger module within said air handler.
20. A vehicle air treatment apparatus according to claim 16 wherein said fluidconnection port passes through an outwardly facing surface of said at least one heat exchanger module.
21. A vehicle air treatment apparatus according to claim 16 wherein said air handler includes at least one air control valve for controlling delivery of fresh air or recirculated air to said passenger compartment.
22. A vehicle air treatment apparatus according to claim 16 wherein the heat transfer fluid is a coolant heat transfer fluid for increasing the temperature of the air.
23. A vehicle air treatment apparatus according to claim 16 wherein the heat transfer fluid is a refrigerant heat transfer fluid for reducing the temperature of the air.
24. A method for servicing a vehicle air treatment apparatus having an air handler and a heat exchanger module having a fluid connection port engageable with a fluid conduit for receiving a heat transfer fluid therefrom, the method comprising the steps of:
a. removing said heat exchanger module from said air handler;
b. maintaining said fluid connection port in fluid communication with the fluid conduit during said step of removing said heat exchanger module from said air handler;
whereby said heat exchanger module can be removed clear of said air handler to allow maintenance on said air handler without disconnecting the fluid conduit from said fluid connection port and draining the heat transfer fluid from said heat exchanger module.
25. A method for servicing a vehicle air treatment apparatus according to claim 24 wherein said heat exchanger module is at least one of a heater core module or an evaporator core module.
26. A method for servicing a vehicle air treatment apparatus according to claim 24 further comprising a step of removing a cover prior to removing said heat exchanger module from said air handler.
27. A method for servicing a vehicle air treatment apparatus according to claim 24 wherein the step of removing said heat exchanger module includes sliding said heat exchanger module out of a chamber within said air handler.
28. A method for assembling a vehicle air treatment apparatus having an air handler and a heat exchanger module having at least one fluid connection port, the method comprising the steps of:
a. connecting a fluid conduit to said at least one fluid connection port;
b. coupling said heat exchanger module to said air handler after step a) has been completed, such that air is passed adjacent said heat exchanger module to affect the temperature of the air; said heat exchanger module being removable from said air handler with the fluid conduit coupled to said at least one fluid connection port;
c. supplying a heat transfer fluid to said heat exchanger module via the fluid conduit and said at least one fluid connection port.
29. A method for assembling a vehicle air treatment apparatus according to claim28 wherein said heat exchanger module is one of a heater core module and an evaporator core module.
30. A method for assembling a vehicle air treatment apparatus according to claim28 wherein said coupling includes sliding said heat exchanger module into a chamber within said air handler.
31. A method for assembling a vehicle air treatment apparatus according to claim28 further comprising the step of installing a cover to maintain said heat exchanger module in said air handler.
an air handler connected to said vehicle for controllably delivering air to the passenger compartment;
at least one heat exchanger module removably coupled with said air handler such that the air is passed adjacent said at least one heat exchanger module to affect the temperature of the air;
said at least one heat exchanger module having a fluid connection port engageable with a fluid conduit for receiving a heat transfer fluid therefrom;
whereby said at least one heat exchanger module can be removed from said air handler without disconnecting the fluid conduit from said fluid connection port.17. A vehicle air treatment apparatus according to claim 16 wherein said at least one heat exchanger module is slidably engageable with said air handler.
18. A vehicle air treatment apparatus according to claim 16 wherein said air handler includes at least one orifice on a front surface thereof for receiving said at least one heat exchanger module.
19. A vehicle air treatment apparatus according to claim 16 further comprisingat least one cover for maintaining said at least one heat exchanger module within said air handler.
20. A vehicle air treatment apparatus according to claim 16 wherein said fluidconnection port passes through an outwardly facing surface of said at least one heat exchanger module.
21. A vehicle air treatment apparatus according to claim 16 wherein said air handler includes at least one air control valve for controlling delivery of fresh air or recirculated air to said passenger compartment.
22. A vehicle air treatment apparatus according to claim 16 wherein the heat transfer fluid is a coolant heat transfer fluid for increasing the temperature of the air.
23. A vehicle air treatment apparatus according to claim 16 wherein the heat transfer fluid is a refrigerant heat transfer fluid for reducing the temperature of the air.
24. A method for servicing a vehicle air treatment apparatus having an air handler and a heat exchanger module having a fluid connection port engageable with a fluid conduit for receiving a heat transfer fluid therefrom, the method comprising the steps of:
a. removing said heat exchanger module from said air handler;
b. maintaining said fluid connection port in fluid communication with the fluid conduit during said step of removing said heat exchanger module from said air handler;
whereby said heat exchanger module can be removed clear of said air handler to allow maintenance on said air handler without disconnecting the fluid conduit from said fluid connection port and draining the heat transfer fluid from said heat exchanger module.
25. A method for servicing a vehicle air treatment apparatus according to claim 24 wherein said heat exchanger module is at least one of a heater core module or an evaporator core module.
26. A method for servicing a vehicle air treatment apparatus according to claim 24 further comprising a step of removing a cover prior to removing said heat exchanger module from said air handler.
27. A method for servicing a vehicle air treatment apparatus according to claim 24 wherein the step of removing said heat exchanger module includes sliding said heat exchanger module out of a chamber within said air handler.
28. A method for assembling a vehicle air treatment apparatus having an air handler and a heat exchanger module having at least one fluid connection port, the method comprising the steps of:
a. connecting a fluid conduit to said at least one fluid connection port;
b. coupling said heat exchanger module to said air handler after step a) has been completed, such that air is passed adjacent said heat exchanger module to affect the temperature of the air; said heat exchanger module being removable from said air handler with the fluid conduit coupled to said at least one fluid connection port;
c. supplying a heat transfer fluid to said heat exchanger module via the fluid conduit and said at least one fluid connection port.
29. A method for assembling a vehicle air treatment apparatus according to claim28 wherein said heat exchanger module is one of a heater core module and an evaporator core module.
30. A method for assembling a vehicle air treatment apparatus according to claim28 wherein said coupling includes sliding said heat exchanger module into a chamber within said air handler.
31. A method for assembling a vehicle air treatment apparatus according to claim28 further comprising the step of installing a cover to maintain said heat exchanger module in said air handler.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67965496A | 1996-07-12 | 1996-07-12 | |
| US08/679,654 | 1996-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2199687A1 true CA2199687A1 (en) | 1998-01-12 |
Family
ID=24727791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2199687 Abandoned CA2199687A1 (en) | 1996-07-12 | 1997-03-11 | Air treatment apparatus for trucks and vehicles and method of assembling and servicing the same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2199687A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6827141B2 (en) * | 2001-02-23 | 2004-12-07 | International Truck Intellectual Property Company, Llc | Vehicle heating and air conditioning modules |
-
1997
- 1997-03-11 CA CA 2199687 patent/CA2199687A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6827141B2 (en) * | 2001-02-23 | 2004-12-07 | International Truck Intellectual Property Company, Llc | Vehicle heating and air conditioning modules |
| US6962195B2 (en) * | 2001-02-23 | 2005-11-08 | International Truck Intellectual Property Company, Llc | Vehicle heating and air conditioning modules |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |