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Publication numberUS3831669 A
Publication typeGrant
Publication dateAug 27, 1974
Filing dateSep 22, 1972
Priority dateSep 25, 1971
Also published asDE2148047A1, DE2148047B2, DE2148047C3
Publication numberUS 3831669 A, US 3831669A, US-A-3831669, US3831669 A, US3831669A
InventorsO Eckhardt, H Menne, W Schirp
Original AssigneeBenteler Werke Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air conditioner
US 3831669 A
Abstract
An air conditioner having heat transfer means in an upper portion of its housing, blower means in a lower portion of the housing for sucking air from a room into the lower housing portion, and adjustable air guide means cooperating with said blower means for passing air sucked in by the blower means over the heat transfer means in the upper housing portion or through a duct communicating with the atmosphere outside the room, respectively to pass fresh air from the outside over the heat transfer means into the room.
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Description  (OCR text may contain errors)

ilnited States Patent [191 Menne et a1.

[451 Aug. 27, 1974 1 AlR QONDITHONIER [75] Inventors: Heinz Menne, Schloss Neuhaus;

Wilhelm Sehirp, Bergneustadt; Otto Ecithardlt, Bielefeld, all of Germany [73] Assignee: Benteler-Werlte Alttiengesellsehaft,

Bielefeld, Germany [22] Filed: Sept. 22, 1972 121] App]. 19052913116 [30] 1F oreign Application Priority Data Sept. 25, 1971 Germany 2148047 [52] US. Cl 165/122, 98/43, 98/38 [51] int. C1. F2411 9/08 [58] Field 01 Search 165/122, 49; 98/38, 43 R [56] References Cited UNITED STATES PATENTS 3,363,531 1/1968 Kohlmeyer et a1. 98/38 Primary Examiner-Charles Sukalo Attorney, Agent, or FirmMichael S. Striker 5 7] ABSTRACT 14 Claims, 3 Drawing Figures AIR CONDITIONER BACKGROUND OF THE INVENTION The present invention relates to an air conditioner which comprises a housing adapted to be placed in a room and having an upper portion communicating with the room and a lower portion. Heat transfer means comprising tubes through which hot or cold water may be passed are arranged in the upper portion of the housing and this upper portion communicates preferably through louver-type slots with the room in which the air conditioner is located, whereas the lower portion of the housing encloses a blower.

Air conditioners of this type are known in the art. An essential disadvantage of such air conditioners resides in the fact that the same can be used only to pass the air from the room through the air conditioner to heat, respectively cool the air. This movement of the air is caused either only by convection action especially if hot water is passed through the tubes or by an additional blower. In order to accomplish a venting of the room separate vent openings preferably in the region of the windows of the room are for this case usually provided, which operate independent of the air conditioner or separate ventilators which work also independent of the air conditioner. These known air conditioners themselves are however only adapted to heat or cool the air in the room and fresh air may be passed into the room only by the additional above-mentioned devices or through an opening in the windows.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioner which overcomes the disadvantages of the above-described air conditioners known in the art.

It is an additional object of the present invention to provide an air conditioner which is not only adapted to cool or heat the air in a room but also to supply the room with fresh air. 7

It is a further object of the present invention to provide an air conditioner of the last-mentioned type which is simple in construction so that it may be produced at a reasonable cost.

With these and other objects in view the air conditioner according to the present invention mainly comprises a housing adapted to be placed in a room and having an upper portion communicating with the room and a lower portion. Heat transfer means are located in the upper housing portion and blower means in the lower housing portion. The blower means having an inlet end communicating with the room and an outlet end. A first air guide duct communicates with the outlet end of the blower means and this first air guide duct has a discharge end communicating with the upper housing portion whereas a second air guide duct has an outer end communicating with the atmosphere outside the room and an inner end adjacent to the discharge end of the first duct. The air conditioner further comprises adjustable means movable between a first position connecting the discharge end of the first air guide duct with the inner end of the second air guide duct, a second position connecting the discharge end with the upper housing portion and at least one third position connecting the discharge end with the inner end of the second duct and the upper housing portion. The first and second air guide ducts preferably include an angle with each other, whereas the adjustable means preferably comprise two flaps including a corresponding angle with each other and being turnable between the aforementioned position about a fixed axis. The two flaps preferably include a fixed obtuse angle with each other and by turning the two flaps about the aforementioned axis it is possible to pass air sucked in by the blower means into the lower housing portion through the first air guide duct into the upper housing portion so that this air will pass over the heat. transfer means and through slots in the upper housing portion into the room or to pass the air sucked by the blower means into the lower housing portion through the second air guide duct to the atmosphere outside the room so as to vent the room, respectively to pass fresh air from the outside of the room over the heat transfer means in the upper housing portion into the room.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation,

together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a partial vertical cross section throughan air conditioner according to the present invention;

FIG. 2 is a partial cross section showing the means for turning the flaps about the axis; and

FIG. 3 is a cross section similar to FIG. 2 and showing a modified arrangement for turning the flaps about the axis.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The air conditioner 1 shown in partial cross section in FIG. 1 comprises a housing 10, the right or front wall of which is provided with a plurality of preferably louver-like slots 11 through which the upper portion 12 of the housing 10 communicates with the room in which the air conditioner is located. Heat transfer means comprisingtubes 2, only one of which is indicated in dash-dot lines, are located in the upper portion of the housing and a cold or hot fluid medium is passed in a known manner, not forming part of the present invention, through the tubes 2. Air is passed in a manner as will be described later on about the tubes so that the air is cooled or heated and passes through the slots 11 into the room to be air conditioned. The box-like housing 1 may be completely closed, or it may be open at the left or rear side and closed at this side by an outer wall 3 of the room to which the housing 10 may be connected in any convenient manner.

Blower means 4 are located in the lower portion of the housing 10 and this blower means extends transversely over the whole width of the housing and is driven by a motor not shown in the drawing. If the air conditioner comprises a plurality of units which may be arranged in any desired manner with respect to each other, then each unit may have its own blower means.

The blower means 4 comprises a casing 42' surrounding the rotatable part 4 of the blower means and having an inlet end 40 preferably flush with the front wall of the housing and closed by a grill or filter 41. The outlet end of the casing 42 is integrally connected to a first air guide duct 42 which has a discharge end communicating with the upper housing portion. The upper or discharge end of the first air guide duct 41 is arranged in the region of the inner end of a second air guide duct 5, the outer end of which passes through an opening in the wall 3 so as to communicate with the atmosphere outside the room in which the air conditioner 1 is located. A grill or filter similar to that shown in 41 is located at the outer end of the second air guide duct 5. A horizontal auxiliary wall 13 is arranged upwardly spaced from the second air guide duct and projects from the wall 3 to which it is connected in any convenient manner into the upper portion 12 of the housing. Adjustable means comprising a pair of flaps 7 and 17, preferably of equal size, and including a preferably obtuse angle with each other are arranged turnable about a common axis 6 positioned in such a manner that during turning of the flaps about the aforementioned axis the free end edges of the flaps will move along a circle 27, indicated in dash-dotted lines, along which corresponding end edges a, b, c and d of the wall 13 and corresponding walls of thefirst and second air guide duct are located.

The ducts 5 and 42 are preferably of rectangular cross section and the obtuse angle between the two flaps 7 and 17 as well as the length of these flaps from the axis 6 are chosen in such a manner that the distance between the free end edges of the two flaps is equal to the distance of the free end edge of the auxiliary wall 13 from the free end of the left wall of the first air guide duct 42, respectively equal to the distance between the free end edge of the upper wall of the second duct 5 from the free end edge of the right or front wall of the first air guide duct 42.

The flaps 7 and 17 are fixedly connected to the shaft 6 for turning with the same about the shaft axis between at least three positions. In a first position, shown in full lines in FIG. 1, the flap 7 engages with its free end edge the free end edge of the front wall or right wall of the first air guide duct 42 along a line indicated in projection at d, where as the free end edge of the flap 7 engages the upper wall of the second air guide duct 5 along a line indicated at b so that in this position air is sucked by the blower 4 from the room in which the air conditioner is located in the direction indicated by the arrows A through the grill 42 and passed through the second air guide duct 5 through the outer end of the latter to the atmosphere outside the room as indicated by the arrows A whereby air from the room is vented to the outside.

By turning the flaps in direction as indicated by the arrow B about the axis of the shaft 6, the flaps will be moved to a second position indicated in dash-dot lines in FIG. 1 in which the free end edge of the flap 7 engages the inner end edge of the wall 13, whereas the free end edge of the flap 17 engages the free end edge of the left or rear wall of the first air guide duct 42, whereby the second air guide duct 5 is closed so that air sucked in by the blower means 4 in the direction of the arrow C is passed in the direction of the arrows C into the upper part 12 of the air conditioner.

If the flaps 7 and 17 are turned further in the direction of the arrow B until the flap 7 reaches the position originally occupied by the flap 17 in the mentioned first position of the flaps, then the inner end of the second air guide duct 5 communicates with the discharge end of the first air guide duct 42 as well as with the upper portion 12 of the air conditioner. In this position, the blower means 4, when actuated, will suck air from the room in the direction as indicated by the arrows D and this air stream, indicated in dash-dot lines, will entrain air from the outside through the second air guide duct 5 in the direction of the arrows B into the upper part 12 of the housing 10 of the air conditioner so that air from the room together with outside air will be passed over the heat transfer means 2.

The flaps may be held in any of the aforementioned positions by snap action arresting means of known construction as indicated for one of the positions at 37. It is to be understood that such arresting means are to be provided for each of the positions of the flaps.

If the flaps have to be operated from one of the side walls of the housing 10, the shaft 6 projects at least with one end beyond a bearing formed in the corresponding sidewall and a hand wheel 16 is fixedly connected to the projecting end of the shaft 6 for turning the latter about its axis. A pointer 18 may be connectingto the hand wheel or the shaft end and appropriate markings 19 may be provided on the sidewall for indicating the position of the shaft and the flaps connected thereto.

On the other hand, it is also possible to operate the flaps from the front wall of the housing 10 and in this case a worm wheel 9 is fixed to the shaft 6, whereas a worm 8 meshing with the worm wheel 9 is fixed to a shaft extending at right angles to the shaft 6 to the outer end of which a hand wheel 16 is connected. In this case the snap action arresting means 37 shown in FIG. 1 will be omitted and it is evident that the flaps may be held not only in the aforementioned three positions but in any intermediate positions therebetween. The handwheel 16 is preferably also in this case provided with a pointer 18 and the front wall of the housing is preferably provided with markings l9 cooperating with the pointer on the hand wheel indicating the positions of the flaps.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended:

1. An air conditioner comprising, in combination, a housing adapted to be placed in a room to be air conditioned and having an upper portion communicating with the room and a lower portion; heat transfer means in said upper housing portion; blower means in said lower housing portion and having an inlet end communicating with the room and an outlet end; a first air guide duct communicating with said outlet end of said blower means and having a discharge end communicating with said upper housing portion; a second air guide duct having an outer end communicating with the atmosphere outside the room and having an inner end adjacent said discharge end of said first guide duct; and adjustable means movable between a first position connecting said discharge end from said first air guide duct with said inner end of said second air guide duct so that air from the room is blown to the outer atmosphere, a second position connecting said discharge end with said upper housing portion while closing said inner end of said second duct so that air from the room is blown over said heat transfer means, and at least one third position connecting said discharge end with said inner end of said second duct and said upper housing portion so that air from the room together with air from the outside atmosphere will be blown over said heat transfer means.

2. An air conditioner as defined in claim ll, wherein said first and said second air guide ducts include an angle with each other and wherein said adjustable means comprises two flaps including a corresponding angle with each other and being turnable between said positions about a fixed axis.

3. An air conditioner as defined in claim 2, wherein said first and said second air guide ducts are of rectangular cross section and wherein said flaps have free end edges respectively engaging in said positions corresponding end edges of said ducts.

4. An air conditioner as defined in claim 3 and including an auxiliary-wall extending above said second air guide duct in said housing, said auxiliary wall having a free end edge engaged by the end edge of one of said flaps in said second position of said adjustable means.

5. An air conditioner as defined in claim 4, wherein said end edges of said flaps are arranged on a circle concentric with said axis and wherein in each of said positions at least one of said flaps engages a corresponding end edge apertaining to said ducts or said auxiliary wall.

6. An air conditioner as defined in claim 2, wherein said flaps include an obtuse angle with each other and are fixed to a shaft extending along said axis.

7. An air conditioner as defined in claim 6, wherein said flaps have equal dimensions.

8. An air conditioner as defined in claim 5, wherein said flaps have equal dimensions, include an obtuse angle with each other and are fixed to a shaft extending along said axis, wherein said first duct has a front wall and a rear wall and said second duct has an upper wall, and wherein said end edges of said flaps are spaced from each other a distance corresponding to the distance of the end edge of said front wall from the end edge of said upper wall, and said auxiliary wall having an end edge spaced from that of said rear wall corresponding to said distance.

9. An air conditioner as defined in claim 8, wherein said auxiliary wall is arranged horizontally and upwardly spaced from said upper wall of said second duct.

10. An air conditioner as defined in claim 1, and including filter means at said inlet end of said blower means and said outer end of said second air guide duct.

111. An air conditioner as defined in claim 10, said blower means including a casing and said first air guide duct communicating with and being fixed to said casmg.

12. An air conditioner as defined in claim 2, and including snap action arresting means for arresting said flaps in the positions thereo 13. An air conditioner as defined in claim 2, wherein said flaps are fixedly connected to a shaft extending along said axis and including a hand wheel fixed to said shaft for turning the latter about said axis and position indicating means for said hand wheel.

14. An air conditioner as defined in claim 2, wherein said flaps are fixedly connected to a shaft extending along said axis and including a worm wheel fixed to said shaft, a worm meshing with said. worm wheel and a hand wheel cooperating with said worm for turning the latter about its axis.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3363531 *Oct 14, 1966Jan 16, 1968Lohmann Appbau K GVentilating arrangement for the rooms of a building, especially of a stall, pigsty, fwl-house or the like
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6065531 *Oct 22, 1996May 23, 2000Rittal-Werk Rudolf Loh GmbhAir water-heat exchanger for a switchgear cabinet
DE3542510A1 *Dec 2, 1985Jun 4, 1987Heinz Georg BausVentilation device
Classifications
U.S. Classification165/122, 454/269, 454/266
International ClassificationF24F1/00
Cooperative ClassificationF24F1/00
European ClassificationF24F1/00