US2014959A

US2014959A - Air conditioning

Info

Publication number: US2014959A
Application number: US755248A
Authority: US
Inventors: Reuben H Anderegg
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-11-28
Filing date: 1934-11-28
Publication date: 1935-09-17
Anticipated expiration: 1952-09-17

Description

R. H. ANDE REGG AIR CONDITIONING Sept. 17, 1935,

3 sheets-sheet 1 Filed Nov. 28, 1934 EVENT??? BY m ATTORNEY Sept. 17, 1935. R, H, ANDEREGG 2,014,959

AIR CONDITIONING Filed Nov. 28, 1954 s Sheets-Sheet 2 INVENTOR M 1/ BY mm ATTORNEY Sept. 17,- 1935. R. H. ANDEREGG AIR CONDITIONING Filed NOV. 28, 1934 3 Sheets-Sheet 3 iN'vENToR BY ATTORNEY Patented Sept. I7, 1935 UNITED STATES, PATENT QFFICE/ AIR CONDITIONING Reuben II. Anderegg, La Crosse, Wis.

Application November 28, 1934, Serial No. 755,248

11 Claims.

This invention relates to air conditioning, and in particular to a system designed for cooling the rooms in a large ofiice building.

In the proper air conditioning of a building it 5 is very important that the humidity be regulated,

as well as the dry bulb temperature or the superheat in the air.

One of the objects of my invention is a system of air conditioning which affords a more economical installation, at the same time giving more effective control of the humidity and temperature in individual rooms. One of the problems in the air conditioning of any large buildings is the varying efiects in the different rooms of sun eflect and occupancy by human beings which cause greater heat additions than otherwise.

Another object of my invention is to control the super-heat in the various rooms in-accordance with the amount of cooling required.

Another object of my invention is to first control the humidity of the air to be supplied to the rooms to be conditioned.

Another object is to control the super-heat,

or dry bulb temperature in the rooms to be conditioned. Another object of my invention is individual room control ofv the superheat. In all cooling and air conditioning there are problems of controlling both dry bulb and wet bulb temperatures as both are requisite for comfort.

' In the'applicants invention the problem is first to supply air with a definite moisture content to the corridors of the building and then to introduce this air with a definite moisture content into the rooms for final conditioning.

Another object of this invention is to supply air with a definite moisture content and to vary the superheat in accordance with the heat additions.

For a clearer understanding of the nature and object of the invention, reference is made to the following detailed descriptions, taken in connection with the drawings shown herewith. In connection therewith, l0 represents the individual rooms to be conditioned.

Figure 1 shows a floor plan of one of several floors in a building showing the main air conditioning and the supplemental air conditioner.

Figure 2 is a section of elevation of the building shown in Figure 1.

Figure 3 is an enlarged section of elevation of the main air conditioner shown in' Figure 1.

Figure 4 is a section elevation of a supplemental air conditioner shown in Figure 1.

Figure 5 shows a wiring diagram of the conwhich valves are interposed between the supnections between the different motors of the supplementary unit l6.

Figure 6 shows diagrammatically the coils 20 and the connection thereto.

The corridor II in the building connects the 5 room III which is to be conditioned with a main air conditioner I2. In the main air conditioner as shown in Figure 3, l3 represents an outside air inlet and I4 an outlet to the corridor H. In the main air conditioner, I8 represents a fan, I9 a 10 filter, 20 a cooling coil, 2| eliminator plates, 22

. a drip pan, 23 a sewer connection from the drip pan, 31 a pre-cooling coil, 38 a re-heating coil, 39 and 40 conduits connecting the coils 31 and 38. 15

The heat absorbing medium in coils 31 and 38 is circulated through

conduits

39 and 40 by a pump 4|. The refrigerant is conveyed to the cooling coil 20 by a supply pipe 42 and returned from thecooling coil by a pipe 43.

In Figure 6 the cooling coil 20 is shown in more detail as individual cooling coils, designated by the

numerals

44, 45, 46 and", which are controlled respectively by

valves

48, 49, 50 and 5|,

25 ply pipe 42 and the

respective coils

44, 45, 46 and 41. The

numerals

56, 51, 58 and 59 represent electrical or pneumatic conduits connecting the

valves

48, 49, 50 and 5| respectively with thermostats 60, 6|, 62 and 63, which are placed in the conduit 64.

52 represents the casing of the main air conditioner l2. The supplementary air conditioner is shown at I6 in Figure Land is supplied with cold water or a refrigerant by the conduits l5 and 35. 24 represents an inside wall abutting the corridor H, in which wall is an opening to the room to be conditioned, ordinarily through a transom 25. The inletfrom the corridor to the supplementary air'conditioner I6 is designated by 26. In this inleflis a damper 2'! controlling 40 the amount of air to beadmitted from the corridor into the supplementary air conditioner 16, in which is an air conditioning coil 28, a fan 29, .a grille 30, and an outlet 3| into the room to be conditioned. The fan 29 is operated by a motor 45 32. If refrigeration water or medium is furnished to the coil 28 at less than the dewpoint of the air entering said coil, there will be condensation which is taken away bya connection 36 to the sewer.

The damper 21 is composed of blades 65 interconnected by the rod 66 to which is attached the rod 61, which is attached to similar damper 68 composed of blades 69 interconnected by rod 10, which is attached to rod 61 in such manner that 55 the movement of the rod 81 will reciprocally open and close the dampers 88 and 21 so that when damper 21 is fully open, damper 68 will be fully closed, and vice-versa. Also, that damper 88 will be in an open position relative to the closed position of damper 21, and vice-versa. The motor 1i actuating the movement of the rod 61 is a motor in commercial usage and not herewith particularly described and is so constructed as to stop the movement of the rod 61 when the thermostat is satisfied. This motor 1| is connected with a humidistat 12 by means of an electrical circuit 13, and the operation of the dampers 21 and 68, in connection with the motor 1i and humidistat 12, is to regulate the proportions of corridor air and recirculated air in accordance with the humidistat. 33 is a dry bulb thermostat in the room l0 connected with the motor 32 by the conduit 34 so as to shut off the motor 32 controlling the fan at a' predetermined temperature. The thermostat 33, also through the conduit 34A, is connected with the motor 14 which is the same kind of a motor as operates the dampers 21 and 68. 'The motor 14 operates the solenoid valve 15, which is interposed in the cold water conduit l5, and the operation of the solenoid valve is modulating, and under the influence of the motor 14 will assume a definite position, either open, closed or intermediate, when the thermostat 33 is satisfied, so that the operation of the valve 15 in connection with the motor 14 and dry bulb thermostat is to regulate the fiow of refrigerating medium in accordance with the dry bulb thermostat 33.

In Figure 5 is shown the wiring connections whereby the motor 32, controlling the fan 29, will continue to operate until both the

thermostat

33 and 12 are satisfied. It will be observed that either the closing of the thermostat 12 or the thermostat 33 will establish a closing circuit for the motor 32,and in this connection 11 represents the line in connecting the motor 32 with the motors 1| and 14. 16 is a power line and 18 a ground.

In the operation of the system in the primary air conditioner, air is drawn from the outside through the inlet l3 and first comes in contact with the precooler 31, which contains a heat exchange fiuid, the temperature of which is reguliated by the temperature of the air passing the reheating coil 38.

This precooled air is then passed through coils 20 which contain a refrigerating medium, the thermostats 68 to 63 controlling the amount of such refrigerant passing through

valves

41, 48, 49 and 50 and said coil 28, so that the air will emerge from the coil 20 with a definite dewpoint and, therefore, a definite moisture content; The air then passes through the re-heating coil 38 containing a heat exchange fiuid, the temperature of which is regulated by the temperature of the air passing through the coil 31. It is thus apparent that the higher the dry bulb air is on entrance to the unit, the higher the dry bulb will be on leaving the re-heating coil 38 due to the higher temperature of the heat exchange fiuid in the coil 38. This is an advantage because the air leaving the coil 38 is emitted into the corridor and the diflerential in temperature between the outside dry bulb temperature and the dry bulb temperature of the air in the corridor is more nearly kept constant and less liable to heat additions on its travel through the corridor. In this connection it is also observed that the reheating work done by the coil 38 is not extra work for at the same time the other end of the cycle, to-wlt, coil 31, is cooling the incoming air in an amount equal to the reheating by coil 38. This to a certain extent takes the load of! the cooling coils 20, the primary purpose of which is dehumidification.

It will be further observed that the air thus primarily conditioned emits into the corridor with a definite moisture content and at a predetermined difierential in dry bulb temperature between the outside air and the primarily conditioned air.

After the air has been primarily conditioned and pumped into the different corridors of the building, it becomes available for conditioning the 13 different rooms to be conditioned. The supplementary air conditioner is located between the room and the corridor, preferably in the transom, which is usually available and afifords an opportunity for placing the unit out of the way.

The first problem of the supplementary conditioner is the regulation of the humidity which is accomplished by varying the quantity of corridor air which has a low moisture content and the quantity of recirculated room air whose :3 moisture content is varied by the conditions which add moisture to the air, particularly the evaporation of moisture from human beings and the presence of water in the room. The corridor air and the recirculated air is mixed and the proportions of the mixture depend upon the conditions required. The amounts of corridor air and room air mixed together is responsive to a humidistat located within the room. The humidistat operates by a motor the dampers 21 and 68 in such manner that when the humidistat with a pre-determined setting is satisfied, the dampers assume a definite position and proportion the amount of corridor and room air to be mixed.

Although one specific embodiment of the in- 40 vention has been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various co-operating parts may be made without 45 departing from the spirit or scope of the invention, as expressed in the following claims.

What I claim is:

1. In an apparatus for air conditioning buildings, the combination of a main air conditioner 50 comprising a casing with an outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building to be con- 55 ditioned, means within said casing in the path of said air to condition said air to a pre-determined dewpoint, means to re-heat said air substantially above its pre-determined dewpoint, a supplementary air conditioner comprising a casing, an 60 air inlet in communication with said corridor, and air outlet into the room to be conditioned, means to circulate air from said inlet to outlet, an air conditioning coil in said casing in the path of said air to extract sensible heat therefrom, and means C3 to regulate the fiow of refrigerant to said coil, said means being responsive to the temperature of the air in said room.

2. In an apparatus for air conditioning buildings, the combination of a main air conditioner 70 comprising a casing with an outside air inlet and an inside air outlet in communication with a corridor ol' the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor oi the building to be con- 75 ditioned, means within said casing in the path of said 'air to condition said air to a predetermined dewpoint, a supplementary air conditioner comprising a casing, an air inlet in communication with said corridor, an air outlet into the room to be conditioned, means to circulate air from said inlet to outlet, an air conditioning coil in said casing in the path of said air, and means to regulate the flow of air through said casing responsive to the temperature of the air in said room.

3. In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casing with an outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building to be conditioned, means within said casing in the path of said air to condition said air to a predetermined dewpoint, a supplementary air conditioner comprising a casing with an air inlet in communication with said corridor containing conditioned air, an air outlet into the room to be conditioned, an air inlet in communication with said room, a mixing chamber, an air conditioning coil, means to circulate air from said inlets through the mixing chamber and coil to said outlet, and means to regulate the mixture of conditioned air and room air, responsive to the humidity of the air in the room. I

i. In an apparatus for air conditioning buildings, the combin tion of a main air conditioner comprising a casing with an outside air inlet and an inside air outlet communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building to be conditioned, means within said casing in the path of said air to condition said air to a predetermined dewpoint, a supplementary air conditioner comprising a casing with-an air inlet in communication with said corridor containing conditioned air, an air outlet into the room to be conditioned, an air inlet in communication with said room, a mixing chamber, an air conditioning coil, means to circulate air from saidinlets through the mixing chamber and coil to said outlet, and means to regulate the mixture of conditioned air and room air, responsive to the humidity of the air in the room, and means to regulate the flow of a refrigerant to said coil responsive to the dry bulb temperature of the room,

5. In an apparatus for air conditioning buildings, the combination of. a main air conditioner comprising a casing withfan outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building to be conditioned, means within said casing in the path of said air to condition said air to a predetermined dewpoint,.a supplementaryair conditioner comprising a casing with an air inlet in communication with said corridor containing conditioned air, an air outlet into the room to be conditioned, an air inlet in communication with said room, a mixing chamber, an air conditioning coil, means to circulate air-from said inlet through the mixing chamber and coil to said outlet, and means to regulate the mixturesot conditioned air and room air, responsive-to the humidity of the air in the room, means to regulate the flow of a refrigerant to said coil responsive to the dry bulb temperature of the room, and means responsive to both the humidity and dry bulb temperature of the room to control the air circulating means.

6. In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casing with an outside air inlet and 5 an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building. to be conditioned, means within said casing in the path of 10.

said air to condition said air to a predetermined dewpoint, a supplementary air conditioner comprising a casing with an air inlet in communication with said corridor containing conditioned air, an air outlet into the room to be conditioned, an air inlet in communication with said room, a, mixing chamber, an air conditioning coil, means to circulate air from said inlets through the mixing chamber and coil to said outlet, an interconnected damper at each of said inlets, a motor operating said damper means responsive to humidity of room controlling the operation of said damper.

7 In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casingwith an outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through theccrridor of the building to be conditioned, means within said casing in the path of said air to condition said air toa predetermined dewpoint, a precooling coil in the path of said air between the inlet and the main cooling coil, and

a reheating coil in the path of said air between the main cooling coil and .the air outlet, conduits carrying a heat exchange fluid and forming a circuit between said precooling coil and said reheating coil, and means to circulate said fluid, a supplementary air conditioner comprising a casing, an air inlet in communication with'said corridor, an air outlet into the room to be conditioned, means to circulate air'from said inlet to outlet, an air conditioning'coil in said casing in the path of said air, and means'to regulate the flow of refrigerant to said coil, said means being responsive to the temperature of the air in said room.

8. In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casing with an outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to saidoutlet and through the corridor of the building to be conditioned, means within said casing in the path of said air to condition said air to a predetermined dewpoint, a precooling coil in the path of said air between the inlet and the main cooling coil, and a reheating coil in the path'of said air between 0 the main coolingfcoil and the air outlet, conduits carrying a heat exchange fluid and forming a circuit between said precooling coil and said reheating coil, and means to circulate said fluid, a supplementary air'conditioner comprising a casing 5 with an air inlet in communication with said corridor containing conditioned air, an air outlet into the room to be conditioned, an air inlet in communication with said room, a mixing chamber, an air conditioning coil, means to circulate air from said inlets through the mixing chamber and coil to said outlet, and means to regulate the mixture. of conditioned air and room air, responsive to the humidity of the air in the room.

9. In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casing with an outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building to-be condiitoned, means within said casing in the path of said air to condition said air to a predetermined dewpoint, a precooling coil in the path of said air between the inlet and the 'main cooling coil, and a reheating coil in the path of said air between the main cooling coil and the air outlet, conduits carrying a heat exchange fluid and forming a circuit between said precooling coil and said reheating coil, and means to circulate said fluid, and means positioned between the main cooling coil and reheating coil to control the amount of refrigerant supplied to main cooling coil, a supplementary airconditioner comprising a casing with an air inlet in communication with said corridor containing conditioned air, an air outlet into the room to be conditioned, an air inlet in communication with said room, a mixing chamber, an air conditioning coil, means to circulate air'from said inlets through the mixing chamber and coil to said outlet, means to regulate the mixture of conditioned air and room air, responsive to the humidity of the air in the room, and means to regulate the flow of a refrigerant to said coil responsive to the dry bulb temperature of the room.

10. In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casing with an outside air inlet and an inside air outlet in communication with a corridor of the building to be conditioned, means to circulate air from said inlet to said outlet and through the corridor of the building to be conditioned, means withinusaid casing in the path of said air to condition said air to a predetermined dewpoint, means to reheat said air substantially above said dewpoint, a supplementary air conditioner comprising a casing, an air inlet in communication with said corridor, an air outlet into the room to be conditioned, means to circulate air from said inlet to outlet, an air conditioning coil in said casing in the path of the air to extract sensible heat therefrom, and means to regulate the flow of refrigerant to said coil, said means being responsive to the temperature of air in such room.

11. In an apparatus for air conditioning buildings, the combination of a main air conditioner comprising a casing. with an outside air inlet and an inside air outlet in communication with a conduit in the building to be conditioned, means to circulate air-from said inlet to said outlet and through said conduit, means within said casing in the path of the air to condition it to a predetermined dewpoint, a supplementary air conditioner comprising a casing, an air inlet in communication with said conduit, an air outlet into the room to be conditioned, means to circulate air from said inlet to outlet, an air conditioning coil in said casing in the path of such air, and means to regulate the flow of air through said casing responsive to the temperature of the air in said room.

' REUBEN H. ANDEREGG.