US3812904A - Device for air conditioning a number of rooms having mutually different heat requirements, preferably rooms having a heat requirement varying with time - Google Patents

Device for air conditioning a number of rooms having mutually different heat requirements, preferably rooms having a heat requirement varying with time Download PDF

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Publication number
US3812904A
US3812904A US34618773A US3812904A US 3812904 A US3812904 A US 3812904A US 34618773 A US34618773 A US 34618773A US 3812904 A US3812904 A US 3812904A
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air
room
heat
rooms
exhaust air
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F Westergren
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Svenska Flaktfabriken AB
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Svenska Flaktfabriken AB
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Priority to SE460072A priority Critical patent/SE364769C/xx
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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
    • F24F3/044Systems in which all treatment is given in the central station, i.e. all-air systems
    • F24F3/056Systems in which all treatment is given in the central station, i.e. all-air systems the air at least partially flowing over lighting fixtures, the heat of which is dissipated or used 

Abstract

A system for air conditioning buildings in which the heat generated by the bulbs in lighting fixtures selectively is used to heat the room, or is carried away with the exhaust air. The system injects central air into the room adjacent the fittings, and exhaust air from the room is conducted away first through the outside window area and then through the lighting fixtures either in a path in direct contact with the bulbs or in a path bypassing direct contact with the bulbs. Dampers are provided to control the proportion of flow through the two paths in the fixtures and thereby to control the proportion of the heat generated by the bulbs which is used to heat the room on one hand and the portion which is discharged with the exhaust air on the other hand. The dampers are controlled in accordance with the demand for heat in the room and an auxiliary heater is provided for the injected air, for operation when the bulbs do not supply sufficient heat to maintain the desired temperature in the space.

Description

United Statesv atet l 1 1 Westergren [451 May 28, 1974 1 DEVICE FOR AIR CONDITIONHNG A NUMBER OF ROOMS HAVING MUTUALLY DIFFERENT HEAT REQUIREMENTS, PREFERABLY ROOMS HAVING A HEAT REQUIREMENT VARYING WITH TIME [75] Inventor: Folke Westergren,Skarholmen,
Sweden [73] Assignee: Aktiebolaget Svenska Flaktfabriken,
Nacka, Sweden [22] Filed: Mar. 29, 1973 [21] Appl. No.: 346,187
[30] Foreign Application Priority Data Apr. 10,1972 Sweden ..4600/72 [52] US. Cl 165/22, 98/40, 165/123 [51] Int. Cl F241 3/00 [58] Field of Search 98/40 DL; 165/22, 50, 122,
[56] References Cited UNITED STATES PATENTS 3,065,686 11/1962 Geocaris 98/40 3,103,157 9/1963 Quin 98/40 3,742,837 7/1973 Samuellson 98/40 Primary Examiner-Charles Sukalo Attorney, Agent, or Firm-Dorfman, Herrell and Skillman; Henry H. Skillman [57] ABSTRACT A system for air conditioning buildings in which the heat generated by the bulbs in lighting fixtures selectively is used to heat the room, or is carried away with the exhaust air. The system injects central air into the room adjacent the fittings, and exhaust air from the room is conducted away first through the outside window area and then through the lighting fixtures either in a path in direct contact with the bulbs or in a path bypassing direct contact with the bulbs. Dampers are provided to control the proportion of flow through the two paths in the fixtures and thereby to control the proportion of the heat generated by the bulbs which is used to heat the room on one hand and the portion which is discharged with the exhaust air on the other hand. The dampers are controlled in accordance with the demand for heat in the room and an auxiliary heater is provided for the injected air, for operation when the bulbs do not supply sufficient heat to maintain the desired temperature in the space.
5 Claims, 1 Drawing Figure DEVICE FOR AIR CONDITIONING A NUMBER OF ROOMS HAVING MUTUALLY DHFFERENT HEAT REQUIREMENTS, PREFERABLY ROOMS HAVING A HEAT REQUIREMENT VARYING WITH TIME The present invention concerns a device for airconditioning a number of rooms, the heat requirements of which are different and vary especially with regard to time, and which rooms are connected to a central airconditioning aggregate, and in which rooms are installed heat-radiating light fittings, the fittings being cooled by means of the known method whereby air discharged from the rooms circulates around them and in which the temperature of air from the central aggregate is adjusted for the room in the building which has the greatest heat load.
The hitherto most advanced system for airconditioning in this field of engineering, e.g. office rooms, hotels and dwelling spaces, is what is known as the four-dust system. In installations of this kind the air being pretreated in a central aggregate is supplied as primary air and is fed into the blow units arranged in each room, in which units the air is retreated in two completely separate heat exchangers each equipped with two tubes for supplying the warm medium and discharging the cold medium. The advantage of the 4-tube system is that it is flexible and renders possible the prompt provision of the greatest feasible air comfort for those in the rooms in accordance with the season and twentyfour hours variations respectively. Nevertheless, the 4- tube system has disadvantages as well above all the high costs of parts and the installation of these. As the air injection comes from the window side of the rooms, the 4 tube system requires piping along the facade of the building. Often special, hollow columns or shafts are necessary for the piping. The device according to the present invention is intended to provide an alternative to the aforesaid 4-tube system. A device in accordance with the succeeding claims and description affords a lower initial capital expenditure and installation cost, as well as it avoids water pipes out on the facades which, considering the risk of water damage in case of a leakage, is desirable from the standpoint of insurance. The only disadvantage for the new model is the operational cost, which is somewhat higher than for the 4-tube system.
The device according to the invention is primarily characterized in that the heat radiating from the light fittings is adapted for the additional heating of the other premises, by that in accordance with the individual heating requirements of the premises a regulated portion of the cooling discharge air from said rooms is channelled through a by-pass duct passing outside the light fittings. An advantageous embodiment of the device is characterized in that the channelling of discharge air is effected by means of the dampers placed partly in an air duct which passes along the side of the light fittings and partly in said by-pass duct, said both dampers being readjusted by means of a common motor. An advantageous embodiment of the device applied in rooms equipped with so called exhaust air windows in which exhaust air is caused to pass through the exhaust air windows and through one or both of said ducts, is characterized in that for the purpose of the concentrated assembly of the air supply and air discharge ducts connected to the central aggregate, the air supply device is installed immediately close to the air supply duct at the end of the rooms opposite to exhaust air window.
The invention will now be described in more detail with reference to the attached drawing showing a schematic illustration of the interacting parts of the device.
In the drawing, 1 indicates an air supply duct for the feeding of pretreated primary air from a central aggregate not shown in the drawing, and 2 is an air supply device, while 4 shows an opening for the evacuation of discharge air from room L 5 stands for an exhaust air window and 6 is a suction box for the exhaust air window. 7 is a duct for conducting exhaust air along the light fittings designated LR LR etc. A corresponding by-pass duct for carrying away the exhaust air past the fittings is designated as 8. 9 and 10 are dampers which are fitted into ducts 7 and 8 respectively. The damper motor for adjusting (changing) these dampers is designated as l1. l2 stands for the air discharge duct used in the removal of exhaust air. 13 denotes an electric heating element, and 14 is the designation for the air supply device in its entirety with discharge screen 15 and screen 3 for local air which is also ejected and recirculated. A screen under the light fittings and duct 7 is designated as 16.
Pretreated primary air is supplied through the air supply duct 1 and is fed into the room through the air supply device 2 operating with a pressure drop of approximately 25 mm/water col. As the temperature of the primary air is low, air from the room is ejected in through screen 3 so that the temperature of the supply air is as close to the room temperature as possible. Exhaust air is evacuated either through an opening 4 and the exhaust air window 5 to the suction box 6 or directly from the room to said suction box 6, and then the air either passes through the fittings or its duct 7 or alternatively through the by-pass duct 8, depending on the position of the dampers 9 and 10. If the damper 9 is closed, all the exhaust air will pass through the fitting duct, and the main portion of the electric power input to the fittings will be carried away with exhaust air via the air exhaust duct 12. If, on the other hand the damper 9 is open and the damper 10 is completely closed, all the exhaust air will pass around the fittings through the by-pass duct 8, and the entire electric power input to the fittings will be supplied to the room, which means that said rooms will be heated. The dampers 9 and 10 are constructed with an infinitely variable regulation, and thus the room can be furnished with more or less heat.
When the damper 10 is completely closed and accordingly all the heat is admitted into the room, it may happen that in certain types of weather the heat will not be sufficient to maintain the right temperature. On such occasions a contact on the damper 10 sends an impulse to the electric element 10 to switch on and thereby the primary air is heated in order to maintain the temperature in the room.
I claim:
1. A system for air conditioning buildings having a plurality of rooms with heat-generating lighting fixtures therein including inlet means, means to condition and inject central air into each room, and means to exhaust air from the room including a passageway through the light fixture, a bypass passage around said light fixture, and means to adjust the heat imparted to said exhaust air by said fixture by regulating the portions of the exhaust air flowing through said two passages.
2. A system according to claim 1 wherein said two passages comprise an air duct running inside of the light fixture and a bypass duct parallel to said air duct, said adjusting means comprising two dampers respectively positioned in said air duct and bypass duct and a common motor to adjust said dampers concurrently to regulate the proportion of exhaust air flowing through said ducts.
3. A system according to claim I wherein said rooms are provided with exhaust air windows having an exhaust air duct for two passages being commonly connected to said exhaust air duct of the window.
4. A system according to claim 3 wherein said room has two opposite sides confronting each other, said window being positioned in one of said sides and said air inlet for central air being positioned in the other of said sides.
5. A system according to claim 4 wherein said light fixture has a lens screen positioned in the ceiling of the room and said central air inlet means is positioned adjacent said screen to cause the air to flow across said screen.

Claims (5)

1. A system for air conditioning buildinGs having a plurality of rooms with heat-generating lighting fixtures therein including inlet means, means to condition and inject central air into each room, and means to exhaust air from the room including a passageway through the light fixture, a bypass passage around said light fixture, and means to adjust the heat imparted to said exhaust air by said fixture by regulating the portions of the exhaust air flowing through said two passages.
2. A system according to claim 1 wherein said two passages comprise an air duct running inside of the light fixture and a bypass duct parallel to said air duct, said adjusting means comprising two dampers respectively positioned in said air duct and bypass duct and a common motor to adjust said dampers concurrently to regulate the proportion of exhaust air flowing through said ducts.
3. A system according to claim 1 wherein said rooms are provided with exhaust air windows having an exhaust air duct for two passages being commonly connected to said exhaust air duct of the window.
4. A system according to claim 3 wherein said room has two opposite sides confronting each other, said window being positioned in one of said sides and said air inlet for central air being positioned in the other of said sides.
5. A system according to claim 4 wherein said light fixture has a lens screen positioned in the ceiling of the room and said central air inlet means is positioned adjacent said screen to cause the air to flow across said screen.
US34618773 1972-04-10 1973-03-29 Device for air conditioning a number of rooms having mutually different heat requirements, preferably rooms having a heat requirement varying with time Expired - Lifetime US3812904A (en)

Priority Applications (1)

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SE460072A SE364769C (en) 1972-04-10 1972-04-10

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US34618773 Expired - Lifetime US3812904A (en) 1972-04-10 1973-03-29 Device for air conditioning a number of rooms having mutually different heat requirements, preferably rooms having a heat requirement varying with time

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US (1) US3812904A (en)
JP (1) JPS5618854B2 (en)
BE (1) BE797610A (en)
CH (1) CH562432A5 (en)
DE (1) DE2314123C3 (en)
FI (1) FI54969C (en)
FR (1) FR2179868B1 (en)
GB (1) GB1431811A (en)
NL (1) NL178626C (en)
NO (1) NO135883C (en)
SE (1) SE364769C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935898A (en) * 1973-10-02 1976-02-03 Aktiebolaget Svenska Flaktfabriken Device for air-conditioning a number of rooms the heat requirements of which are different and vary preferably with respect to time
US4253384A (en) * 1977-04-18 1981-03-03 Schmidt Reuter Ingenieurgesellschaft Mbh & Co. Kg Ventilating and air conditioning arrangement
US4351475A (en) * 1980-06-24 1982-09-28 Hudson James W Environmental control room dividers
US5295904A (en) * 1991-02-28 1994-03-22 Hitachi, Ltd. Air conditioning system
US20080009237A1 (en) * 2006-07-05 2008-01-10 Mouxiong Wu Air vent cover controller & method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3065686A (en) * 1960-04-29 1962-11-27 Thomas Industries Inc Lighting and ventilating fixture
US3103157A (en) * 1961-11-06 1963-09-10 Emerson Electric Mfg Co Lighting and air conducting apparatus
US3742837A (en) * 1971-07-14 1973-07-03 Svenska Flaektfabriken Ab Arrangement at ventilation installations in rooms provided with exhaust air windows and lighted by a number of fittings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3065686A (en) * 1960-04-29 1962-11-27 Thomas Industries Inc Lighting and ventilating fixture
US3103157A (en) * 1961-11-06 1963-09-10 Emerson Electric Mfg Co Lighting and air conducting apparatus
US3742837A (en) * 1971-07-14 1973-07-03 Svenska Flaektfabriken Ab Arrangement at ventilation installations in rooms provided with exhaust air windows and lighted by a number of fittings

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935898A (en) * 1973-10-02 1976-02-03 Aktiebolaget Svenska Flaktfabriken Device for air-conditioning a number of rooms the heat requirements of which are different and vary preferably with respect to time
US4253384A (en) * 1977-04-18 1981-03-03 Schmidt Reuter Ingenieurgesellschaft Mbh & Co. Kg Ventilating and air conditioning arrangement
US4351475A (en) * 1980-06-24 1982-09-28 Hudson James W Environmental control room dividers
US5295904A (en) * 1991-02-28 1994-03-22 Hitachi, Ltd. Air conditioning system
US20080009237A1 (en) * 2006-07-05 2008-01-10 Mouxiong Wu Air vent cover controller & method

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Publication number Publication date
SE364769C (en) 1975-05-29
NO135883C (en) 1977-06-15
FI54969B (en) 1978-12-29
FI54969C (en) 1979-04-10
GB1431811A (en) 1976-04-14
DE2314123B2 (en) 1974-04-11
NO135883B (en) 1977-03-07
DE2314123C3 (en) 1974-11-14
NL7304565A (en) 1973-10-12
JPS499844A (en) 1974-01-28
NL178626C (en) 1986-04-16
FR2179868A1 (en) 1973-11-23
SE364769B (en) 1974-03-04
DE2314123A1 (en) 1973-10-25
FR2179868B1 (en) 1976-11-12
BE797610A (en) 1973-07-16
BE797610A1 (en)
JPS5618854B2 (en) 1981-05-01
CH562432A5 (en) 1975-05-30

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