US2142423A - Control for air conditioning apparatus - Google Patents

Control for air conditioning apparatus Download PDF

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Publication number
US2142423A
US2142423A US99367A US9936736A US2142423A US 2142423 A US2142423 A US 2142423A US 99367 A US99367 A US 99367A US 9936736 A US9936736 A US 9936736A US 2142423 A US2142423 A US 2142423A
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switch
control
air
blower
circuit
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US99367A
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Timmis William Walter
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AMERICAN RADIATOR Co
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AMERICAN RADIATOR CO
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification

Description

Jan..3, 1939. w.w. TIAMIVVIIS 2,142,423
CONTROL FOR AIR CONDITIONING APPARATUS Filed Sept. 4, 1936 ,3; INVENTOR. J
William, iVaZfer .Yiz'rrzrrzzis Patented Jan. 3, 1939 UNITED S A E PATENT OFFICE 'coN'raor. FOR An CONDITIONING.
. 'Arrm'ms William Walter Timmis, Glen Cove, N. Y., assignor to American Radiator- Company, New York, N. Y., a corporation of New Jersey Application Sept'ember 4, 1 a3s, sen i No. 99,367- 1 cmmi (01. 236-44.)
' ating several air conditioning instrumentalities employed in the system will be under manual control for controlling the operation of one or more of said instrumentalities.
' Further, said invention has for its object to provide a system of the character specified in which the air circulating means thereof may be operated either conjointly with a humidifying means thereof "or independently thereof.
Further, said invention has for its object to provide a system of the character specified in which the air circulating means and the humidifying means thereof, or the air circulating means alone, may be operated either under control of a temperature responsive device or not, as required.
Other objects will in part be obvious and in part be pointed out hereinafter.
in the accompanying drawing, Figure l is a vertical, diagrammatic section of one form of system constructed according to and embodying my said/ invention, and
.Fig. 2, is a wiring diagram thereof.
Referring to the drawing, the unit I of the particular air conditioning system disclosed, is of the type supplementing the usual heating system employed in a house or, building, and includes an outer casing ll having a return portion or duct l2 from the room orrooms of the buildinmand also in communication with the fresh air from the outside of the building. The air delivered through the portion l2 to the unit In first passes through a suitable filter [3, preferably composed of corrugated fibre board arranged to form V-shaped cellular passages for causing abrupt change in the direction of travel of the air. The surfaces of the fibre board are coated with a tacky compound for catching dust, soot, pollen,
etc., carried by the air.
The air is forced or drawn through the casing II and into the supply pipe oroutlet H for delivery to the room or rooms by air circulating means is, preferably comprising a centrifugaltype of blower driven by an electric motor [6. The blower I5 .is preferably located within an inner casing l5, while the motor I6 is mounted within the casing ll below the supply outlet I.
An air heating element I1 is located within the casing I lbetween the blower casing-iii and a'second inner casing l8 forming a humidifying or spray chamber 19 immediately in advance. of the filter l3. The heating means l'l preferably comprises the cast-iron headers 20 communicating with each other through the usual intervening heat radiating member made up of tubes. (not shown) disposed transversely of the unit..
'Suitable operatingfiuid, such as steam or hot water, is supplied to the element I! through supply pipe 21 connected to the upper portion of the header at one side, and the fluid escapes through the return pipe 22 connected to the lower portion of the header at the opposite side. The
structure of element I1 forms no part of my pres- 18 cut invention and therefore need not be shown or described in greater detail.
Water is delivered through a supply pipe 23 and is discharged into the humidifying chamber;
I9, through a spray nozzle 24 which ejects the 80 water in a fine stream which impinges upon the target or plate 25 to produce a mist for'the humidification of the air passing .through the chamber I9. The nozzle 24 is preferably of the self-cleaning type. The supply of water to 26 the nozzle 24 is controlled by means of a magnetic or solenoid shut-oil valve 26 in the supply pipe 23. In operation, the air is drawn by the blower I5 through the filter l3 into the chamber IQ for admixing with the moisture therein, then through 30 the tempering or heating element I! for thermally conditioning the air for comfort and for vaporizing the moisture carried thereby, and
thence through the blower to the supply outlet H for delivery to the rooms. is provided forthe removal of excess water which might be deposited within the unit I0.
The operation of the unit lllmay be flexibly controlled manually from the switch panel or plate "placed in a convenient location within 0 the building andprovided with the switch buttons or handles 29, .30 and 3| for controlling the circuits of the several instrumentalities or devices embodied in the unit.
' Preferably, the system is also automatically controlled by the heat responsive circuit controlling device 32, preferably in thermal contact with the return pipe 22 at a point thereon close to the heating element II. The heat responsive device is of any well known type adapted to make con- .tact and close. the circuit thereof upon rising temperature, and as the same attains a value of the order of -200'- F., accordin to the oper-' The circuit throu' {i Adrain outlet 21 35 opposite panel terminal 38 of the switch 29 is connected by a lead 40 with the panel terminal 4| oi the switch 30 with which the conductor 33 is connected. The opposite panel terminal 4| of the switch 30 is for the attachment of the line conductor 33.
The terminal 38 is electrically connected by a bridging conductor 42 with the panel terminal 43 for the switch 3|. The other terminal 43' of the switch II is connected by conductor 44 with one terminal of a, humidistat 45 adapted to automatically close the circuit thereof when the humidity drops to a predetermined value. The other terminal of the humidistat 45 is connected by conductor 48 which the positive side of the solenoid valve 26 controlling the water supply and operating when energized to open the valve. This allows one terminal of the solenoid valve 26 to be grounded, if so desired. The humidistat 45 may be located at any convenient point reflecting the humidity conditions such as in the room, or in the air return portion i2.
In operation, when it is desired to operate the unit ll under automatic control. the Switches 3! and ii are closed and the switch 28 left open. With the switches II and ii in closed position, the motor I is in series with the thermo-responsive device 32. and starts running as soon as the temperature of the heating element H or i return 22 attains the desired value and the circuit at the thermostat I! automatically closes. With the humidity control switch 3| closed, the
theme-responsive device 32 is also in series' through the parallel circuit portion 31, connection 4!, switch 3 I and connection 44 with the humidistat 4i and the water controlling means 28.
with the switch setting as above described, the blower II cannot operate to draw air through the unit until the temperature conditions determined by the theme-responsive device 32 and required for desirable operation are attained. Further, the electrically operated valve 26 is also under the control of thethermo-responsive circuit controlling device 32 and only operates when the circuit 01' the motor it closes to supply the nozzle I4 with water tor the discharge thereof into the flowing air within the spray chamber '18. Such control is effective even though the humidistat 45 is calling for more moisture. be opened the valve 28 closes and the fan 'I i operates under the control oithethermostat 32 -withlast control arrangement or setting the thermostat Ills shortcircuited, and the'current is supplied from the positive side of the line through switch 3|, conductor 40, switch", and conductor I! to the motor I and then to the negative side I of the line for insuring continuous operation of the blower II. a parallel circuit is also then If the switch it completed through conductor, switch 3|, humidistat 45 and control 26 to the negative side of the line for operation of the spray coniointly with the fan or blower. By opening switch 3|, the fan or blower I! may be operated alone without the operation of spraying means 24. By opening the main control or cut-ofl switch 30 the operation of the unit can be entirely discontin- "ued, irrespective of the positions of the other switches 28 and II.
By my invention I am able to operate the blower and spray conjointly, either under control of the thermostat 32 or not, as desired. In either case, the spray cannot operate unless the blower is operating, and the humidity control circuit may be manually opened without opening the circuit of the motor for operating the fan. The switch 30 is in series relation with both the Ian operating circuit and the humidity control circuit, as well as with the respective switches 28 and ii located therein, so that when the switch 30 is opened the operation of the motor l6 ceases and the valve 26 closes, even though the switches 28 and 3] remain closed. Irrespective of whether the motor circuit is closed through switch 30 or through both switches 29 and 30, the opening of the switch 3| will interrupt the operation of the spraying means without discontinuing the operation of the motor and the blower, and the flow of air through the system.
In my invention, the circuit connections are disposed so that the motor I and water control 28 in parallel relation may be placed either in series relation with said thermostatic control 32 or in short-circuited relation thereto, and I provide means for manually controlling said circuits to establish eitherof said relations as desired. I am also able by provision of a manual control in the parallel circuitportion including the humidity control 2' to operate the motor I and drive the blower ll without operation oi the humiditying means 24. What I claim and desire to secure by Letters Patent of the United States is:--
In air conditioning apparatus for room spaces, the combination or a housing having an inlet and an outlet adapted to be connected to the space to be conditioned; means providing an air passage in saidhousing connecting the inlet and the outlet; a spray-type humidifier in said passage including a'spray head: a solenoid valve controlling the flow of water to said head; a tubular heat exchanger arranged across'said passage i'or heating the air leaving the humidifier; supply and return pipes fora heating fluid connected to said heat exchanger; a blower in said passage providing for the flow of air therethrough; an electric motor for operating said blower; 'a thermostat responsive to the temperature of the heating fluid at the return side of said heat exchanger; and an electrical circuit for, operating said solenoid valve and fan motor selectively by hand and in response to said thermostat and comprising a main part including in seriesa master hand switch, said thermostat and two branch parts in parallel, one of said branch parts including said motor. and the other of said ,branch parts including in series a hand switch and said solenoid valve,'and a shunt part connecting said master switch directly to said branch wsnrna
US99367A 1936-09-04 1936-09-04 Control for air conditioning apparatus Expired - Lifetime US2142423A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503002A (en) * 1946-04-22 1950-04-04 William F Shreve Air conditioner and humidifier for air-heating furnaces
US2633929A (en) * 1948-08-24 1953-04-07 Farr Co Apparatus for filtering air
US3319946A (en) * 1963-01-07 1967-05-16 Jr Joseph W Fulton Environmental control apparatus
US3537692A (en) * 1967-08-29 1970-11-03 Leroy Vick Humidifier
US4290274A (en) * 1979-07-16 1981-09-22 Essex Donald D Liquid spray device with adaptive duty cycle
US4574062A (en) * 1980-09-12 1986-03-04 Jacob Weitman Apparatus for treating contaminated gas
US20050072171A1 (en) * 2002-02-08 2005-04-07 Jensen Tim Allan Nygaard System and method for cooling air
US20060162354A1 (en) * 2005-01-26 2006-07-27 Jensen Tim A N Heat transfer system and method
US20080034776A1 (en) * 2005-08-09 2008-02-14 Tim Allan Nygaard Jensen Prefilter System for Heat Transfer Unit and Method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503002A (en) * 1946-04-22 1950-04-04 William F Shreve Air conditioner and humidifier for air-heating furnaces
US2633929A (en) * 1948-08-24 1953-04-07 Farr Co Apparatus for filtering air
US3319946A (en) * 1963-01-07 1967-05-16 Jr Joseph W Fulton Environmental control apparatus
US3537692A (en) * 1967-08-29 1970-11-03 Leroy Vick Humidifier
US4290274A (en) * 1979-07-16 1981-09-22 Essex Donald D Liquid spray device with adaptive duty cycle
US4574062A (en) * 1980-09-12 1986-03-04 Jacob Weitman Apparatus for treating contaminated gas
US20050072171A1 (en) * 2002-02-08 2005-04-07 Jensen Tim Allan Nygaard System and method for cooling air
US7021070B2 (en) 2002-02-08 2006-04-04 Tim Allan Nygaard Jensen System and method for cooling air
US20060162354A1 (en) * 2005-01-26 2006-07-27 Jensen Tim A N Heat transfer system and method
US7441412B2 (en) 2005-01-26 2008-10-28 Tim Allan Nygaard Jensen Heat transfer system and method
US20090049846A1 (en) * 2005-01-26 2009-02-26 Tim Allan Nygaard Jensen Heat Transfer System and Method
US7757499B2 (en) 2005-01-26 2010-07-20 Tim Allan Nygaard Jensen Heat transfer system and method
US20080034776A1 (en) * 2005-08-09 2008-02-14 Tim Allan Nygaard Jensen Prefilter System for Heat Transfer Unit and Method
US7805953B2 (en) 2005-08-09 2010-10-05 Tim Allan Nygaard Jensen Prefilter system for heat transfer unit and method

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