US3799255A - Heat exchange unit - Google Patents

Heat exchange unit Download PDF

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Publication number
US3799255A
US3799255A US00267711A US26771172A US3799255A US 3799255 A US3799255 A US 3799255A US 00267711 A US00267711 A US 00267711A US 26771172 A US26771172 A US 26771172A US 3799255 A US3799255 A US 3799255A
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US
United States
Prior art keywords
annular body
unit
ribs
air
annulus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00267711A
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English (en)
Inventor
H Luderssen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Hausgeraete GmbH
Original Assignee
Robert Bosch Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Hausgeraete GmbH filed Critical Robert Bosch Hausgeraete GmbH
Application granted granted Critical
Publication of US3799255A publication Critical patent/US3799255A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
    • F24F1/0323—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
    • F24F1/0325—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
    • F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/228—Heat exchange with fan or pump
    • Y10S165/302—Rotary gas pump
    • Y10S165/303—Annular heat exchanger
    • Y10S165/304—Axial impeller

Definitions

  • ABSTRACT [30] Foreign Application Priority Data July 21, 1971 Germany 2136369
  • a carrier forms a drum-shaped housing having opposite open ends and a plurality of air-flow apertures.
  • a [52] US. Cl. 165/122, 62/426 support extends across one of the open ends and an [51] Int. Cl. F24h 3/08 axial blower with its associated drive is located within [58] Field of Search 165/122-126; the housing, A spirally convoluted heat-exchanger unit 10, 247; 15/1 3 is located at the other end of the housing so that air aspirated by the blower passes into the housing in [56] References Cited contact with the heat-exchanger unit.
  • the present invention relates generally to a heat exchange unit and particularly to a heat exchange unit which is especially suitable for use in air conditioners. Still more particularly, the invention relates to a heatexchange unit which is particularly suited for use in room air conditioner units.
  • Heat exchange unit particularly those used in roomtype air conditioners are usually provided with a substantially flat box shaped case of rectangular outline.
  • the heat exchangers are in form of tubes which are accommodated in the case in meander-shaped configuration and provided with fins.
  • this type of heat exchange unit requires a relatively large amount of space and because of this it necessarily influences generally speaking, in a disadvantageous manner the dimensions and configuration of the entire air conditioner. It is necessary under such circumstances to provide the air conditioner itself of box-shaped outline.
  • room air conditioner is the type which is intended to be installed in windows.
  • air conditioners are of box-shaped outline, determined by the box-outline of the heat exchange unit thereof, difficulites are often experienced when they are to be installed in the window, particularly in a casement window.
  • a window pane must frequently be provided with a cutout, usually a circular cutout for reasons of simplicity of forming the cut, in order to accommodate an air guide baffle which is provided at the outlet side (the side where warm air is expelled) of the heat exchange unit.
  • baffles necessarily increase the expenses in terms of material and assembly, as well as complicating the final installation.
  • Another object of the invention is to provide such a heat exchange unit which can be economically manufactured.
  • Another object of the invention is to provide such a heat exchange unit which is simple to assemble and to install as well as being easy to service and being compact in its dimensions.
  • Another object is to provide such a heat exchange unit having an advantageous relationship between its dimensions and its capacity.
  • a heat exchange unit which briefly stated comprises carrier means forming a drum-shaped housing having opposite open ends and a plurality of air-flow apertures. Axial blower means and drive means therefore are both accommodated within the housing. Support means is provided in the region of and extends across one of the open ends and spirally convoluted heat-exchanger means is provided on the housing in the region of the other of the open ends thereof.
  • the housing may be provided on its support means with substantially radially arranged ribs which extend at least approximately along the generatrices of an imaginary cylinder and which carry an annular body surrounding the axial blower.
  • This makes it possible to maintain the air gap between the blades of the axial blower and the annular body particularly small, which in turn provides for a highly efficacious guidance of the air being low in losses as well as in noise.
  • this construction provides for a concentric air aspiration which assures an even and uniform air flow.
  • the aforementioned ribs may also be provided on their outwardly directed edges, which are at least substantially located at the outer diameter of the annular body, with a filter band which is annularly placed about the carrier means and covers the air flow openings located between the ribs and delimited on the one hand by the support means and on the other hand by the annular body.
  • a filter band which is annularly placed about the carrier means and covers the air flow openings located between the ribs and delimited on the one hand by the support means and on the other hand by the annular body.
  • FIG. 1 is an exploded perspective view illustrating the essential components of a heat exchange unit accord- FIG. 3 is an end view of the heat exchange unit of FIGS. 1 and 2 with certain components being broken away in order to partially make visible other components located behind them.
  • reference numeral 11 designates a carrier unit which defines a drum-shaped housing of circular outline and having opposite open ends. One of these ends is provided with a circular support plate 12 which is provided in the region of its outer marginal edge with an annulus of radially arranged ribs 13 extending along the generatrices of an imaginary cylinder. An additional annulus of ribs 14 is also provided on the plate 12, located between the ribs 13. An annular body 15 is carried on the ribs 13 and 14 at that end of the ribs which faces away from the plate 12.
  • An annular circular opening is provided in the plate 12, at the base of the ribs 13 and 14, being identified with reference numeral 16 and permitting the insertion of a non-illustrated, non-divided forming mandrel.
  • the purpose of this is'to permit it to produce the element 11 together with the plate 12 and the ribs 13 and 14 as a unitary component from synthetic plastic material in a simple mold. Of course other materials than synthetic plastic may also be used.
  • Air inlet openings 17 are provided intermediate the ribs 13 and 14 and the annular body 15 is provided in those portions which'delimit the openings 17 in an arched configuration, analogous to a nozzle in order to provide for advantageous deflection of the incoming air stream.
  • a bore 18 is provided in the plate 12 being coaxial with the central axis of the annular body and having a centering purpose which is to be described subsequently.
  • a retaining portion 19 is provided on the outer marginal portion of the plate 12 being eccentric with reference to the central axis of the annular body 15 and having a purpose which is still to be discussed.
  • a mounting plate portion 20 is of one piece with the plate 12, being located at least substantially in the same plane as the latter and being provided in the region of maximum eccentricity, of the portion 19.
  • an axial blower 21 which is mounted on the output shaft of an electromotor 22.
  • the motor 22 is provided with a centering portion 22' at that end which faces away from the output shaft and which centering portion is fitted with narrow tolerance into the bore 18 when the unit 10 is assembled.
  • the output shaft of the motor 22 and thereby the axis of rotation of the blower 21 is coaxial with the central axis of the annular body 15, assuring that the air gap between the annular body 15 and the outer tips of the blades of the axial blower 21 can be maintained to the absolute minimum necessary to assure that there will be no contact between them. This provides for maximum air flow impelled by the blower at minimum development of noise.
  • the outer edges of the ribs 13 and 14 are substantially located on the same circumferential line as the outer diameter of the annular body 15. They carry a filter tape 23 which is circularly placed about the body 15 and which covers the openings 17 which are between the ribs 13 and 14 and delimited by the plate 12 and the annular body 15, respectively.
  • the tape 14 can be retained in various ways, for instance by the holding member 24 illustrated in the drawing and being provided with pins or the like which are pushed into the overlapping ends of the tape 23.
  • a heat exchange unit 25 is illustrated, being of spiral configuration and being provided on the annular body 15 at that end thereof which faces sway from the plate 12.
  • the unit 25 is composed, as particularly evident from FIG. 2, of a spirally convoluted tape or band provided with channels 26 for cooling medium and being held together by a tensioning tape 27 which is shown separately in FIG. 1.
  • the tape 27 is provided with several brackets 28 which serve for engagement with devices 29 provided at the outer circumference of the annular body 15, thereby retaining the unit 25 at the axial end of the latter. Screws 30 connect the brackets 28 with the devices 29.
  • the tape 27 is further provided with a device 31 which engages and holds a removable receptacle, here configurated as a bowl 32 or the like, for condensate which drips off the unit 25.
  • a conduit 33 is provided which communicates with the interior of the bowl 32 and carries away the condensate through the plate 12' to the exterior of the element 11.
  • Anchor members 34 are also provided on the tape 27, each carrying a threaded bolt 35 for engagement with nuts 36 which serve to retain a ring 37 of a cover 38, the ring 37 being provided with a sieve like portion.
  • portion 19 on the circumferential margin of the plate 12.
  • the purpose of this portion 19 is to hold and center that end of the cover 38 which faces away from the ring 37.
  • the portion 19 is eccentrically offset with reference to the central axis of the body 15 in the direction towards the plate portion 20. This assures that a rather large space exists between the body 15 over the unit 25 and the cover 38, in which the bowl 32 is accommodated.
  • the plate portion 20 which has also been mentioned earlier serves to carry control and regulating devices for controlling and regulating the operation of the heat exchange unit. Such devices are not a part of the present invention and are in any case conventional; for this reason they have not been illustrated and it is merely necessary to keep in mind that they are to be mounted on the plate portion 20.
  • a cap 39 removably secured on the plate portion 20, provides protection for these devices which are to be mounted on the same.
  • the individual components of the heat exchange unit according to the present invention are essentially carried by the element 11. Because of this it is possible to assemble the element 11 in a particularly simple, clearand economic manner. Moreover, servicing of the unit is especially easy, and, because by removing the nuts 36 the cover 38 can be readily withdrawn, affording access to the band 23 for cleaning or replacement, the unit can readily be serviced even by persons of no skill in the art, for instance by the average user.
  • the axial blower 31 aspirates air through the cover 38 which is perforated or configurated as a grid-or the like.
  • the aspirated air first flows through the filter tape 23 at the openings 17 and is then made to flow over the heat exchange surfaces of the heat exchanger 25. Now cooled and cleaned of any relatively large contaminants it passes through the screen portion of the ring 37. A part of the aspirated air stream will pass prior to its entry into the heat exchanger 25 over the regulating devices located beneath the cover 38 and thus assures that the devices will precisely and rapidly respond to varying temperature conditions.
  • the device which has been illustrated by way of example of FIGS. 1 3 is particularly suitable for wall-installation.
  • the outer side of the plate 12 may be provided with eyes in which hooks mounted in a wall can be inserted.
  • a second, similarly constructed unit can be connected with the illustrated device, with the two plates 12 being abutted, whereby a particularly compact but highly efficient air conditioner is created.
  • one of the two units so connected can be provided with a condenser or the mounting can be affected in other manner.
  • a heat exchange unit particularly for use in air conditioners, comprising carrier means forming a drum-shaped housing, said carrier means comprising an annulus of circumferentially spaced substantially radially extending ribs forming between themselves a plurality of radially extending air flow passages and an annular body integral with and projecting from one end of said annulus of ribs; axial blower means coaxially arranged within said annular body and comprising fan blades having outer ends spaced with a minimum clearance from the inner surface of said annular body just sufficient to prevent contact between said blades and said annular body; drive means for driving said blower means arranged coaxially within said annulus of ribs; spirally convoluted heat exchanger means coaxially carried by said annular body on the end thereof facing away from said annulus of ribs; and support means extending across the other end of said annulus of ribs for supportin said unit on a wall, said drive means being carried by said support means, whereby during operation of said blower means air is sucked through said air
  • said ribs having outwardly directed edges which at least substantially coincide with an outer diameter of said annular body; and further comprising a strip of filter material annularly surrounding said annular body and supported on said edges in a position covering said air-flow passages.
  • said support means comprising centering means coaxial with the central axis of said annular body; and wherein said drive means comprises an electro motor having an output shaft and, at a side facing away from said blower means, a centering portion which so engages said centering means that said output shaft is coaxial with said axis of said annular body.
  • said support means comprising an at least substantially circular plate memher having an outer diameter greater than the outer diameter of said annular body and projecting radially outwardly thereof with an annular marginal portion; and wherein said marginal portion is configurated for engaging a cover surrounding said annular body.
  • said plate member including in the region of greatest eccentricity of said marginal portion a mounting portion for control elements of said unit, said mounting portion being located substantially in the plane of said plate member.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
US00267711A 1971-07-21 1972-06-29 Heat exchange unit Expired - Lifetime US3799255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2136369A DE2136369A1 (de) 1971-07-21 1971-07-21 Waermeaustauscheraggregat, insbesondere fuer raumklimageraete

Publications (1)

Publication Number Publication Date
US3799255A true US3799255A (en) 1974-03-26

Family

ID=5814298

Family Applications (1)

Application Number Title Priority Date Filing Date
US00267711A Expired - Lifetime US3799255A (en) 1971-07-21 1972-06-29 Heat exchange unit

Country Status (6)

Country Link
US (1) US3799255A (de)
AT (1) AT309026B (de)
DE (1) DE2136369A1 (de)
ES (1) ES404993A1 (de)
FR (1) FR2146393A1 (de)
IT (1) IT962850B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193609A (en) * 1990-04-19 1993-03-16 Cowart Darrow W Low profile heating and colling unit for vehicles
US5675986A (en) * 1995-10-24 1997-10-14 Chen; Tze-Li Air-conditioning fan
US5890373A (en) * 1997-08-14 1999-04-06 Smith; Gerald C. Room air conditioner design
US20090020265A1 (en) * 2005-05-10 2009-01-22 BSH Bosch und Siemens Hausgeräte GmbH Heat exchanger
US20110180240A1 (en) * 2010-01-23 2011-07-28 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Centrifugal blower and heat dissipation device incorporating the same
US10845065B1 (en) * 2018-12-11 2020-11-24 Gabriel Rosario Air fan with ice compartment
CN112361466A (zh) * 2020-10-10 2021-02-12 珠海格力电器股份有限公司 一种圆筒式出风窗口及空调器
USD969760S1 (en) 2019-12-02 2022-11-15 Advanced Thermal Solutions, Inc. Fluid mover enclosure
US11662103B2 (en) * 2013-06-24 2023-05-30 Electrolux Appliances Aktiebolag Air-conditioner
US11859915B1 (en) * 2019-01-31 2024-01-02 Advanced Thermal Solutions, Inc. Fluid mover enclosure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303444C2 (de) * 1993-02-05 2002-03-14 Bayerische Motoren Werke Ag Verdampfer einer Fahrzeug-Klimaanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1892303A (en) * 1927-07-02 1932-12-27 B F Sturtevant Co Method and apparatus for propelling fluids
US2044832A (en) * 1934-06-26 1936-06-23 Aeriet Air Conditioner Company Air conditioner
US3089314A (en) * 1961-06-08 1963-05-14 Gen Electric Fan construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1892303A (en) * 1927-07-02 1932-12-27 B F Sturtevant Co Method and apparatus for propelling fluids
US2044832A (en) * 1934-06-26 1936-06-23 Aeriet Air Conditioner Company Air conditioner
US3089314A (en) * 1961-06-08 1963-05-14 Gen Electric Fan construction

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193609A (en) * 1990-04-19 1993-03-16 Cowart Darrow W Low profile heating and colling unit for vehicles
US5675986A (en) * 1995-10-24 1997-10-14 Chen; Tze-Li Air-conditioning fan
US5890373A (en) * 1997-08-14 1999-04-06 Smith; Gerald C. Room air conditioner design
US20090020265A1 (en) * 2005-05-10 2009-01-22 BSH Bosch und Siemens Hausgeräte GmbH Heat exchanger
US20110180240A1 (en) * 2010-01-23 2011-07-28 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Centrifugal blower and heat dissipation device incorporating the same
US11662103B2 (en) * 2013-06-24 2023-05-30 Electrolux Appliances Aktiebolag Air-conditioner
US10845065B1 (en) * 2018-12-11 2020-11-24 Gabriel Rosario Air fan with ice compartment
US11859915B1 (en) * 2019-01-31 2024-01-02 Advanced Thermal Solutions, Inc. Fluid mover enclosure
USD969760S1 (en) 2019-12-02 2022-11-15 Advanced Thermal Solutions, Inc. Fluid mover enclosure
CN112361466A (zh) * 2020-10-10 2021-02-12 珠海格力电器股份有限公司 一种圆筒式出风窗口及空调器

Also Published As

Publication number Publication date
IT962850B (it) 1973-12-31
AT309026B (de) 1973-07-25
ES404993A1 (es) 1975-07-16
DE2136369A1 (de) 1973-02-01
FR2146393A1 (de) 1973-03-02

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