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2, 1952 Filed April 12, 1949 .- 2, 1952 W. O. KLlNE Z, 6 1 9 8, 0 2 AIR CONDITIONING SYSTEM Filed April 12, 1949 4 Sheets-Sheet 1 ___ ____ INVEN TOR. W. O. KLINE ATTORNEY . 2, 1952 w. o. KLINE 2,619,802 AIR CONDITIONING SYSTEM Filed April 12, 1949 4 Sheets-Sheet 2 IN VEN TOR. W. O. K L W E ATTORNEY - 2, 1952 w. o. KLINE 2,619,802 AIR CONDITIONING SYSTEM Filed April 12, 1949 4 Sheets-Sheet 3 FIG. 5 IN VEN TOR. W- O- KLINE ATTORNEY Dec. 2, 1952 w. o. KLINE 2,619,802 AIR CONDITIONING SYSTEM Filed April 12, 1949 4 Sheets-Sheet 4 IN VEN TOR. W. O. KLINE ATTORNEY Patented Dec. 2, I952 - 2,619,802 r 2,619,802‘ , “ AIR CONDITIONING SYSTEM’ ‘‘ Y ' William 0;,Kli1na Weyncsbw, 134-» essiéiiift-f'c FriclilComp'any; Waynesboro, Pa; a'corpora tibfi of Pennsylvania Application April12, 1949;~seriai?o.§8i,t5i 1 " 26 claims. (Cl. 62-4) _\ 1 . This invention relates to‘, the conditioning of rruit, preserves trie- appre; overa rdnge ‘ peruse or air and more particularly to the provision of ‘a time and with a minimum loss or weigh .v system adapted to maintain a_ space ‘or the air within an enclosure at speci?edconditions of temperature and relative humidity and within close limits. - vastly differe'iit'frioni e found ‘n eoniiitioiv‘ng The problem of maintaining proper conditions for 'ljiuhr‘a'ri 'cf'omfort For‘ examplaj the operation of temperature and ‘humidity or air conditioning at these smears“ is per‘ ‘rnie'd very close to for various purposes has eiiis't'ed for a long time, and in more recent years many‘ systems have 10 seturatioiifiiissib'le limits-“f aiidt vari‘é'fd ti'or'rmus" t be.v, much?iinerz't ’ . been devised and patented on various methods of On the other hand, in'eon‘ditioning' for’ human conditioning air. A large percentageor these comfort the operation is jurther‘frqm the satura systems have been directed to air conditioning tion line and therefore the controls need not be for human comfort‘. Empiricaleohditionsor a as sensitive. > Furthermore, the range or condi range within which the‘ ‘space’ sheum'be main 15 tions for: human comioruzas‘ recognized by vari-}' tained,‘ have been speci?ed. For eiiample with ous authorities; is considerably‘ wider‘ or greater certain prevailing‘ outside conditions vthe inside than those: permissible‘ in thé conditioning of temperature should preferably be on the order of certain commodities: ' I V. 70° F; and 50' per Cent relative hu?iidi?y. The im‘portarrce of preserving various commode‘ Apparently considerably less attention has 20 itie's. for relatively long‘ periods of time will be been given and certainly relatively new systems appreciated on re?ecti'onf'that often a product andv patents have directed to the condi can best be sold duringvthe elf-season‘ when sim tioning, of‘ a space for industrial purposes such ilar products are notionsthe market insubstantial 'as the storage or commodities‘ where the pre quantity, and that in large storage installations ' ferred conditions‘ have been of: order di-?e‘ring' 25 the loss of size. or‘ weight" of the product, even‘ if substantially in scope frd?i’tha’t 6f the human only inatheineighborhood-of. about‘ 5' .or 10' per comfort range"; ‘ _ _ cent-results in substantial loss. The present invention’, and applicationvis' di An object of the present’ invention’ is to‘ pro rected to the provision of a system for maintain vide' ari'air conditioning systeirr including means‘ ing a space at‘ a temperature and relative humid 301 capable of conditioning air within an‘ enclosure at ity best suited for the storage‘ of a commodity a relatively high humidity ‘and a-rela'tivelyv low or food having a very large water’ content, such temperature. > ' ' as‘ apples._ . A further ‘object of the invention is to' provide It has been found that in ‘order’ to vr'flail'ltain means‘ wherebya' commodity may be stored for stored apples in thefbest condition for the longest - a relatively long-period of-time‘ and; its‘ size,‘ time and with minimum loss of weight by dehy weiahticompositi-on and appearance substantially dration; certain optimum conditions‘ are both de maintailnedan ‘ ' ~ sirabl'e' and necessary.‘ In order to’ accomplish Another object of‘the invention to‘ provide‘ these results, the temperature should be low means ‘for ‘condition-ing- the spacelin which’ a: enough to prevent the substantial growth of product isstored inforder that t-he‘loss" of moisture in-the product wiuibe-aminimum: : bacteria and preserve therfrui't in its original . A further; object “of the inventioniistoprovide state as nearly as’ possible but without impairing a system; forv conditioning ‘a-stora'ge space for the quality and texture by a-enang'e ofstate, such commodities j in- which the‘ temperature, relative as’freez'ing; and the humidity must be kept rela humidity, andgventilation are“ controlled so" that“ tively high to prevent excessive evaporation of the commodities are preserved infsubstantially moisture. their originalcondition'. > . ' Although: this invention isrpriinaril-y' ‘directed A: still- further objector. the‘invention ‘is ‘to'pro'-‘ to' the preservationofcommodities withoutfreeze vide- a; yearuarorund; ‘air conditioning’ system“ for ing, it- is- obviously applicable to‘ other tempera commodities which i‘sladapted temperate e'?i-‘ ture ranges including those-at vwhich a; given ciently and on a relatively-l'ar’ge'or‘smalfscalé' commodity is- normally the‘ frozen‘ state. It has‘ been found that a' dry bulb temperature’ of about 32° F; and-‘a; relative/"humidity of5abou't1j 8'5 pen ‘cent; together‘ withflow‘ air: velocity the 2,619,805? - ' V. " ‘ ~ 3 4 which is adapted to maintain close control of the are connected to the supply header I5 and have conditions and to operate the various components discharge lines I1’ and I1” leading to their re of the system in the most e?icient manner. spective evaporators. Similarly a header 3I ex These and other objects of the invention will tends from the hot gas line 24 and is provided become aparent from the following description with branch lines 32 and 33 leading to their re taken in conjunction with the accompanying spective heat exchange elements of other hu drawings, wherein: midifying units. The branch lines are connected Fig. l is a schematic diagram of a system con in parallel so that any ‘combination of one or structed in accordance with the present'inven more in operation is possible. _ tion, the left hand portion being a layout of the 10 In operation, the compressors receive refriger refrigeration and air condtioning units and. the ant gas through the suction line 2I and discharge right hand portion illustrating a vertical section it through the line II to the condenser I2 where through a building in which ducts from the air it is lique?ed. Passing from the condenser I2 and conditioning system are positioned; the receiver I3’ the liquid refrigerant is expanded Fig. 2, a partial schematic layout of a modi?ed 15 through the expansion valve 20 and goes into the system; evaporator coil I8 where it cools the air passing Fig. 3, a vertical section through a humidi?er over the coils. The gas from the coils then enters of a modi?ed construction from that shown in the suction line 2I to the compressor I3 or I0’. A Figs. 1 and 2; portion of the hot gas from the compressor may Fig. 4, a View similar to Fig. 3, of a modi?ed 20 be by-passed around the condenser and to the humidi?er having its sump below the ?oor level; heat coil 25, located in the humidifying unit; the Fig. 5, a fragmentary schematic layout of a gas, giving up heat to the recirculated water in modi?ed system; and, the humidi?er, is thereby liquefied and conducted Fig. 6, a diagram of a control system employed through the liquid lines 26 and 2'! to the expan with the apparatus of the present invention. sion valve 30 and the evaporator IS. The invention is primarily directed to an air conditioning system, including a refrigeration The air conditioning chamber system, an air conditioning chamber including a The cooling unit.--In order to control the tem cooling unit and a humidifying unit, an air duct perature, relative humidity, and velocity of the system communicating with the space to be con 30 air circulated through the conditioned space, an ditioned, and controls for the system. air conditioning chamber 40 is provided which in cludes cooling and humidifying units 4| and 42 The refrigeration system in parallel in the chamber. The chamber has a The refrigeration system, adapted for cooling return air opening 43, and discharge openings 44 the air within the space, comprises compressors and 45 for the cooling and humidifying units re I0 and I0’ in parallel and having a. discharge line spectively. Positioned near the inlet 43 is a main i I in which an oil trap I I’ is located, the line I I fan or blower 46, powered by a motor 47'. The leading to a condenser I2 connected by a line I3 blower 43 has diverging walls 41 and guide vanes to a receiver I3’. From the receiver I3’ 9. liquid 156’ on its outlet which direct its discharge to a supply line I4 leads to a header I5 for supplying cooling chamber 48. refrigerant to a conduit I6 which leads to a re Positioned in the cooling chamber 48 adjacent ceiving pipe I‘! of the evaporator coils I8. Posi the evaporator I8 of the refrigeration system are tioned in the line I6 are an electric control valve pipes 49 which are adapted to spray water, brine, I 3 and an expansion valve 20.
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