US2235116A - Air conditioning apparatus - Google Patents

Description

March 18', 1941. w RAY 2,235,116

AIR CONDITIONING APPARATUS Filed Nov. 15. 1939 2 SheetsSheet' 1 1 D Pan/5e fr- 6 i H H Gttorncg Juncntor; v

w. A. RAY Am'counrrrou rm APPARATUS March 18, 1941. 2,235,116

Filed Nov. 15, 1939 2 Sheets-Sheet 2 Eur 3nventor;

Way/w 4. EA),

1 Other objects and advantages or the invention A valve port member 31, having a port 38 and Patented Mar. 18, 1941 I I UNITED STATES PATENT OFFICE 2,235,116 Am connrnomno .srranarus William A. Ray, Glendale, Calif. Application November 15, 1939, Serial No. 304,456 8 Claims. (Cl. 261-25) My present invention relates to air conditionand drain by gravity through the excelsior coning apparatus and more particularly to that tained therein into the reservoir it where it type of apparatus which is employed in air conaccumulates, as a secondary supply 23, for recirditioners commonly known as Desert coolers. culation through said inclosure.

A main object of my invention is the pro- The valve and aspirator assembly i3, shown in 5 a vision of apparatus for filtering, humidlfying detail in Fig. 3, comprises a casing 24 provided and cooling air and which includes a frame! with valve means, electrically operable to open like inclosure packed with moisture retaining or closed positions, and generally indicated by material through which the air is circulated. the numeral 25, regulating valve means, genermeans for providing water from a primary supally indicated at 26, for controlling the pressure 10 ply to'th'e inclosure, and means for recirculating ot the water passing to valve 25, and aspiratlng the unevaporated water draining through the in-- means, generally indicated at 21, and operated closure along with the water from the primary by water'flow through said casing. supply. The valve means 25 comprises a plunger 28, it A further object of myinvention is the prooperable by a solenoid device 29 to raised posi- 1i5 7 vision of means ,ifor recirculating water through tion in contact with stop button 30, and operaan air moistening device and which comprises tivcly connected by links 3| and 32 to a valve an aspirator operated by water flowing from a member 33, which is sliclable in a supporting primary supply to the device, member 34 secured in the outlet of said casing. 20 A still further object resides in the provision The link I2 is pivotally supported on said mem- 20 of means for regulating the supply or primary ber 34 and has a notch 35 cooperating with a and recirculated water to an air moistening dep 3 p d d on the stem o s d v e em er. vice in accordance with the rate of evaporation This valve operator is the subject of Patent No. of the water in the device, 2,052,246, granted to me on August 25, 1936.

will be found in the description, the drawings and a es r c ed Ou O fi 3 1S threadedli' the appended claims. ceived in the member 34. A spring in normally For complete understanding of the invention, h the Valve member to (11086 h P r n reference may be had to the following detailed t P 8 13 t lowered P m description and accompanying drawings wherein: Aspir ins means i provi ed by a Venturi tube 3 a Figure 1 is a side elevation of apparatus emmember 42 cooperating with the orifice 39. When bodyingmy invention, partly in section, and, a. the valve member 33 is inv open position, water diagram or an electrical control circuit thereior; flows through op nin 4 in m m r V v Figure 2 is an end elevation of the apparatus p rt 38. orifice 39 and passageway r a in shown in Fig. 1; a partial, vacuum in chamber 45 and drawing 3 Figure 3 is an enlarged sectional vi w of the water from the reservoir l5 through the openings control valve and aspirator shown in Fig. l; and fflrmed n member 42 and r n m n i Figure 4 is a diagram or a modified control alon w h the Water f m he rifice 3 I circuit. The pressure regulating valve means 26 com- 4 In the drawings, the numeral ll d te a, prises a valve member 41, cooperable with a port conduit connecting a valve and aspirator assem- 4| provided in a partition 49 separating the inbly 13 to a conventional, or primary, supply or let of the assembly from the central chamber 50, water under pressure. The assembly II is seand biased toward p n p ition by a sprin 4| cured by a flange II in an opening f rm d in compressed between a valve cap 5l-and a head an end wall of a trough-like reservoir Ii. Sup- I? p v d d n t upper n p rt on f valve A ported above said reservoir is a frame-like memm pp r y t c i -24 is e bracket bar or inclosure [8 having open upper and lower 54 o th upper end Portion of which is P ly ends and perforate frontand back walls or wire ur a a 5 h v a t s d portion screen 11 and containing a filling or moisture l6 normally in a ut n r at n w th the valve o retaining material It, such as excelsior. v stem ead 2- di st ys ur t the other Positioned above said inclosure and connected end portion of said arm, by a rod 51, is a float 58. to the outlet of said valve and aspirator assem- The throttling or regulatin valve 26 is not bly l3b'y conduits I! and 20, is a water disintended to completely shut-oft the supply of tributing pipe 2! having openings 22 through water and accordingly 9, portion of the stem .53 so which water can pass to the top of said inclosure a isprovided with threads with which an adjusting nut II and a lock nut'lfl cooperate. The nut H,

by engagement with the cap 5!, limits the movement of the valve member 41 toward closed position.

Means for circulating air through the inclosure I6 is provided by an electrically driven fan 59. Connections for a source or power for the operation of said fan and the valve 25 are indicated by the legend. A manually operated switch 09,

having Ofl," "Circulate" and 0001" positions,- -controls the operation of the air conditioning apparatus. In the "Off" position of said switch, power supply to the fan and to the valve 25 is interrupted, with resultant stoppage of both water and air circulation.

In the circulate position, under normal conditions the fan only is energized and dry air is forced through the filtering medium in the inclosure.

In the Cool position of the switch, both the fan and the valve are connected in parallel to the power and consequently the valve 25 opens, permitting water to flow to the inclosure l8 through which it drains by gravity into the reservoir and from which it is recirculated through the inclosure by the aspi-rator along with water from the primary supply.

The level of the water in the reservoir is normally maintained within relatively narrow limits by the float-operated pressure-regulating valve 26 which regulatesgthe supply of primary and recirculated water to the inclosure in response to change in the level of the water caused by variation of evaporation rate in the inclosure. A relatively small fiow of primary water through the aspirator suffices for recirculation of a large amount of water from the reservoir and so normally substantially all of the primary water is consumed by evaporation. Variation in the amount of primary water supplied is efi'ected by variation in the pressure of the water at the orifice 39 produced by the float-operated valve. If

the humidity of the atmosphere becomes relatively high, reduced evaporation from the inclosure may permit the reservoir to fill and accordingly an overflow drain 64 is provided.

In cool weather, circulation only 01' dry air is normally required for comfort. However, to

' guard against excessive dryness of the air then circulated by the apparatus, a humidostat 8| may be connected to one terminal wire of the valve solenoid 29 and to the "Circulate contact of the switch; the switch,in its circulate position, thusconnecting the valve to the Power in series with the humidostat. In response to an abnormally dry condition of the air, the humidostat closes a switch to complete this circuit, with the result that the valve 25 is opened, permitting water to pass through the inclosure to humidity the air circulating therethrough. It will be noted that, in the Cool position of the switch, the valve is open continuously and is not under the control of thehumidostat.

In the modified control circuit of Fig. 4, a differential thermostat'is shown connected in series with the valve. This circuit is in other respects identical with that of Fig. 1. The diflerential thermostat comprises a circuit-controlling thermostat 62 responsive to indoor temperature, modulated in its action by a device 83 positioned outdoors and responsive to the temperature there,

air, or oi cooling it too far below the temperature existing outdoors. With the apparatus connected as shown in Fig. 4, when the switch is in "Circulate position, the humidostat 6| and the thermostat 52 are in series, so that the opening of either one will efl'ect closure of valve 25; and when the switch is in "Cool position, the thermostat alone controls the valve 25.

It is to be understood that the specific embodimerit of my invention which I have shown and described is for the purpose of illustration only and that modifications may be made without departing from the spirit of my invention. My in-' vention, therefore, is to be limited only by the tion, an air moi tenin member, a conduit connecting said member with a primary supply of water, a reservoir for receiving unevaporated water draining from said member, aspirating means in said conduit and operated by water flow therethrough and in communication with said reservoir for transmitting water therefrom to said member along with the water from said primary supply, and means for circulatingair with respect to said member.

3. In an air conditioning system, in combination, an air moistening member, a conduit connecting said member with a primary supply of water, a reservoir for receiving u evaporated water draining from said member, aspirating means in said conduit and operated by water fiow therethrough and in communication with said reservoir for transmitting water therefrom to said member along with the water from said primary supply, valve means connected in said conduit ahead 01' said aspirating means and responsive to the level of the water in said reservoir for controlling the pressure of the water supplied to said aspirating means, and means for circulating air with respect to said member.

4. In an air conditioning system, in combination, an air filtering and moistening device comprising a perforate frame-like inclosure containing excelsior or the like, a conduit connecting the top of said inclosure with a primary-supply 01' water, a reservoir for receiving water draining by gravity through said inclosure and through which a portion oi! said conduit extends, and aspirating means in said portion of said conduit and operated by water flow therethrough for transmitting water from said reservoir to said inclosure along with the water from said primary supply.

5. In an air conditioning system, in combination, an air filtering and moisten'ing device comprising a perforate name-like inclosure containing excelsior or the like, a conduit connecting the top of said inclosure with a primary supply of water, a reservoir for receiving water draining by gravity through said inclosure and through which a portion 01' said conduit extends, aspirating means in said portion of said conduit and operated bywater flow therethrough-i'or transmitting water from said reservoir to said inclosure along with the water from said primary supply, and means for circulating air through said inclosure.

6. In an air conditioning system, in combination, on air filtering and moistening device comprising a perforate frame-like inclosure contain-- ing excelsior or the like, a conduit connecting the top or said inolosure with a primary supply oi water, a reservoir for receiving water draining lay gravity through said inclosure and through which a portion of said conduit extends, aspirating means in said portion of said conduit and operated by water now therethrough for transmitting water rrom said reservoir to said inclosu're along with the water from said primarysupply, valve means connected in said conduit ahead oi said aspiratlng means and responsive to the level or the water in said reservoir for controllina the pressure of the water supplied to said a. meanaand means for circulating air through said inclosure.

V. In an air conditioning system, in combination, a trough-like receptacle, a valve casing mounted in a wall or said receptacle and having an inlet and an outlet and means controlling fluid flow therebetween, means connecting said inlet with a primary supply oi. watenan air niterlng. and mcistening device mounted above said receptacle and comprising a petrol-ate frame-like inclosure containing euelsior or the like through whi h wa er 7 n w into sa d eceptacle, a conduit connecting the outlet of said valve casing with the top oi. said inclosure and having a portion'wi-thin sald receptacl, aspirating means in said portion and operated by water flow therethrough iortransmitting water from said receptacle to said inclosure along with the water from said primary'supply, and a tan for circulating air through said inclosure. a

8. In/an air conditioning system. in combination, a trough-like receptacle, a valve casing 10 mounted in a wallol said receptacle and having 7 an inlet and an outlet and means controlling fluid flow therebetween, means connecting said inlet with a primary supply or water, an air iiitering and moistening device mounted above said 15 receptacle and comprising-a perforate frame-like inclosure containing excelsior or the like through which water can drain by gravity into said rec'eptacle. a conduit connecting the outlet or said .valve casing with the top of said inclosure and 20 RAY,

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