WO2008077208A2 - Grille for air conditioning unit wrapper assembly - Google Patents

Grille for air conditioning unit wrapper assembly Download PDF

Info

Publication number
WO2008077208A2
WO2008077208A2 PCT/BR2006/000291 BR2006000291W WO2008077208A2 WO 2008077208 A2 WO2008077208 A2 WO 2008077208A2 BR 2006000291 W BR2006000291 W BR 2006000291W WO 2008077208 A2 WO2008077208 A2 WO 2008077208A2
Authority
WO
WIPO (PCT)
Prior art keywords
condenser
grille
discharge
wrapper assembly
wall
Prior art date
Application number
PCT/BR2006/000291
Other languages
French (fr)
Other versions
WO2008077208A3 (en
Inventor
Regis Silva
Rafael Schabbach
Original Assignee
Springer Carrier Ltda
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 Springer Carrier Ltda filed Critical Springer Carrier Ltda
Priority to BRPI0622211-0A priority Critical patent/BRPI0622211A2/en
Priority to PCT/BR2006/000291 priority patent/WO2008077208A2/en
Publication of WO2008077208A2 publication Critical patent/WO2008077208A2/en
Publication of WO2008077208A3 publication Critical patent/WO2008077208A3/en

Links

Classifications

    • 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
    • F24F1/022—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
    • F24F1/027—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle mounted in wall openings, e.g. in windows
    • 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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards

Definitions

  • This application relates to an air conditioning unit. More particularly, the application relates to a discharge grille on a wrapper assembly for the air conditioning unit.
  • Air conditioning units for window mounted applications are compact. As a result, some of these air conditioning units employ an L-shaped or U-shaped condenser to maintain or improve cooling capacity in a compact package.
  • the condenser includes an elongated portion and a pair of spaced apart bent portions.
  • the elongated portion is arranged near a rear wall of the unit's wrapper assembly.
  • the bent portions are arranged near opposing side walls of the wrapper assembly adjoining the rear wall.
  • One or both of the side walls include an inlet grille, typically provided by rows of louvers, to supply air to the unit, for example, provide fresh air to cool the condenser heat exchanger. This air is blown across the condenser and discharged out the rear wall by a fan to remove heat from the refrigerant within elongated portion of the condenser.
  • Some prior art units having U-shaped condensers also include openings on the side wall near the rear wall to accommodate the discharge flow through the condenser to cool the bent portions as well. The discharge flow have higher temperature if compared to the outside environment.
  • One problem with prior art discharge openings is that the discharge flow may be drawn back into the inlet grille. As a result, undesirably hot air is introduced back into the unit.
  • An air conditioning unit includes a condenser having an elongated portion and a bent portion.
  • a fan is arranged to provide a discharge air flow across the condenser.
  • a wrapper assembly at least partially encloses the condenser and fan.
  • the wrapper assembly includes a wall having an inlet grille.
  • the wall also includes a discharge grille having directional openings oriented away from the inlet grille for preventing the discharge air flow from reentering the inlet grille.
  • Figure 1 is an exploded perspective view of an example air conditioning unit.
  • Figure 2 is a top elevational perspective view of an example condenser and wrapper assembly.
  • Figure 3 is a side elevational perspective view of an example discharge grille.
  • Figure 4 is a top elevational view of a rear portion of the air conditioning unit.
  • the unit 10 has a housing that includes a base pan 12 and a wrapper assembly 14.
  • the base pan 12 supports a compressor 16 that pumps refrigerant to a condenser 18.
  • An expansion device (not shown) is arranged as know, for example, upstream from the condenser 18.
  • the expanded refrigerant flows to an evaporator 20 before returning to the compressor 16.
  • a motor 24 draws air through the evaporator 20 using a blower 26 to provide cooled air through a front grille 22, which is exposed to an interior room for example.
  • the blower 26 recirculates room air through a partition 28 to further cool the recirculated air.
  • Refrigerant from the evaporator 20 is exposed to the outside environment in one example.
  • a fan 30 is driven by the motor 24 to blow air across the condenser 18 to reject heat from the refrigerant to the outside environment.
  • a condenser orifice or shroud 32 provides a seal between the condenser 18 and the fan 30.
  • the housing all includes a top cover 34 arranged between the shroud 32 and condenser 18 to provide an enclosure about the fan 30.
  • a controller 36 communicates with the compressor 16 and motor 24 in a known manner to provide a desired conditioned air to the room.
  • the condenser 18 includes an elongated portion 38 and one or more bent portions 40 to provide a L-shaped or U-shaped condenser, best shown in Figure 4.
  • the condenser 18 is typically arranged at a rearward portion of the unit 10, shown in Figures 3 and 4.
  • the elongated portion 38 is typically arranged near a rear wall 45, and the bent portion 40 is arranged near a side wall 44.
  • the fan 30 generates a discharge airflow D across the condenser 18 to which heat from the condenser 18 is rejected. It is desirable to prevent any discharge airflow D from entering an inlet grille 42 provided on the side wall 44.
  • the inlet grille 42 provides an airflow F into the unit 10 for removing heat from the condenser (via discharge airflow D).
  • a discharge grille 48 is provided on the side wall 44 near the rear wall 45.
  • the discharge grille 48 and inlet grille 42 are on the same side.
  • the discharge grille 48 includes multiple directional openings 50 that direct the discharge airflow D away from the inlet grille 42 ( Figure 4).
  • the directional openings 50 are arranged in rows 52 and provided by deformed wall portions 54 in the metal wrapper assembly 14 creating slots or louvers that open away from the inlet grille 42.
  • the discharge airflow D is directed toward the rear of the unit 10 and away from the inlet grille 42 to prevent "short-circuiting" of the air, which would reintroduce hot air into the inlet grille 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Abstract

An air conditioning unit is provided that includes a condenser having an elongated portion and a bent portion. A fan is arranged to provide a discharge airflow across the condenser. A wrapper assembly at least partially encloses the condenser and fan. The wrapper assembly includes a wall having an inlet grille. The wall also includes a discharge grille having directional openings oriented away from the inlet grille for preventing the discharge airflow from reentering the inlet grille.

Description

GRILLE FOR AIR CONDITIONING UNIT WRAPPER ASSEMBLY
BACKGROUND OF THE INVENTION
This application relates to an air conditioning unit. More particularly, the application relates to a discharge grille on a wrapper assembly for the air conditioning unit.
Air conditioning units for window mounted applications are compact. As a result, some of these air conditioning units employ an L-shaped or U-shaped condenser to maintain or improve cooling capacity in a compact package.
In the example of a U-shaped condenser, the condenser includes an elongated portion and a pair of spaced apart bent portions. The elongated portion is arranged near a rear wall of the unit's wrapper assembly. The bent portions are arranged near opposing side walls of the wrapper assembly adjoining the rear wall.
One or both of the side walls include an inlet grille, typically provided by rows of louvers, to supply air to the unit, for example, provide fresh air to cool the condenser heat exchanger. This air is blown across the condenser and discharged out the rear wall by a fan to remove heat from the refrigerant within elongated portion of the condenser. Some prior art units having U-shaped condensers also include openings on the side wall near the rear wall to accommodate the discharge flow through the condenser to cool the bent portions as well. The discharge flow have higher temperature if compared to the outside environment. One problem with prior art discharge openings is that the discharge flow may be drawn back into the inlet grille. As a result, undesirably hot air is introduced back into the unit.
What is needed is an apparatus and method for discharging air flow through the bent portion without introducing the discharge air flow back into the inlet grille.
SUMMARY OF THE INVENTION An air conditioning unit is provided that includes a condenser having an elongated portion and a bent portion. A fan is arranged to provide a discharge air flow across the condenser. A wrapper assembly at least partially encloses the condenser and fan. The wrapper assembly includes a wall having an inlet grille. The wall also includes a discharge grille having directional openings oriented away from the inlet grille for preventing the discharge air flow from reentering the inlet grille.
These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an exploded perspective view of an example air conditioning unit. Figure 2 is a top elevational perspective view of an example condenser and wrapper assembly.
Figure 3 is a side elevational perspective view of an example discharge grille.
Figure 4 is a top elevational view of a rear portion of the air conditioning unit.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
An air conditioning unit 10 is shown in Figure 1. The unit 10 has a housing that includes a base pan 12 and a wrapper assembly 14. The base pan 12 supports a compressor 16 that pumps refrigerant to a condenser 18. An expansion device (not shown) is arranged as know, for example, upstream from the condenser 18. The expanded refrigerant flows to an evaporator 20 before returning to the compressor 16. A motor 24 draws air through the evaporator 20 using a blower 26 to provide cooled air through a front grille 22, which is exposed to an interior room for example. The blower 26 recirculates room air through a partition 28 to further cool the recirculated air.
Refrigerant from the evaporator 20 is exposed to the outside environment in one example. A fan 30 is driven by the motor 24 to blow air across the condenser 18 to reject heat from the refrigerant to the outside environment. A condenser orifice or shroud 32 provides a seal between the condenser 18 and the fan 30. In one example, the housing all includes a top cover 34 arranged between the shroud 32 and condenser 18 to provide an enclosure about the fan 30. A controller 36 communicates with the compressor 16 and motor 24 in a known manner to provide a desired conditioned air to the room.
In one example, the condenser 18 includes an elongated portion 38 and one or more bent portions 40 to provide a L-shaped or U-shaped condenser, best shown in Figure 4. The condenser 18 is typically arranged at a rearward portion of the unit 10, shown in Figures 3 and 4. The elongated portion 38 is typically arranged near a rear wall 45, and the bent portion 40 is arranged near a side wall 44. The fan 30 generates a discharge airflow D across the condenser 18 to which heat from the condenser 18 is rejected. It is desirable to prevent any discharge airflow D from entering an inlet grille 42 provided on the side wall 44. The inlet grille 42 provides an airflow F into the unit 10 for removing heat from the condenser (via discharge airflow D).
To maximize the overall efficiency of the condenser 18, it is desirable to generate a discharge airflow D across the bent portion 40 to remove heat from the condenser 18 in this area. To this end, a discharge grille 48 is provided on the side wall 44 near the rear wall 45. The discharge grille 48 and inlet grille 42 are on the same side. In the example shown in Figures 2 and 3, the discharge grille 48 includes multiple directional openings 50 that direct the discharge airflow D away from the inlet grille 42 (Figure 4).
Referring to Figure 3, the directional openings 50 are arranged in rows 52 and provided by deformed wall portions 54 in the metal wrapper assembly 14 creating slots or louvers that open away from the inlet grille 42. In this manner, the discharge airflow D is directed toward the rear of the unit 10 and away from the inlet grille 42 to prevent "short-circuiting" of the air, which would reintroduce hot air into the inlet grille 42.
Although example embodiments of this invention have been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.

Claims

1. An air conditioning unit comprising: a condenser; a fan for generating a discharge airflow across the condenser; and a wrapper assembly at least partially enclosing the condenser and the fan, the wrapper assembly including a wall providing an inlet grille for introducing fresh air into the wrapper assembly and a discharge grille having at least one directional opening for directing the discharge airflow away from the inlet grille.
2. The unit according to claim 1, wherein the condenser includes an elongated portion and a bent portion, the wrapper assembly including a rear wall and an adjoining side wall, the elongated portion arranged near the rear wall and the bent portion arranged near the side wall, the inlet and discharge grilles provided in the side wall.
3. The unit according to claim 1, wherein the at least one directional opening comprises multiple louvers arranged in at least one row.
4. The unit according to claim 3, wherein the louvers are arranged generally vertically.
5. The unit according to claim 3, wherein the louvers are deformed wall portions of the side wall.
6. The unit according to claim I5 comprising a motor driving the fan and a blower.
7. A method of manufacturing an air conditioning unit comprising the steps of: providing a wrapper assembly wall having an inlet grille; stamping louvers into the wall to create openings oriented away from the inlet grille providing a discharge grille; and installing a condenser into the wrapper assembly with at least a portion of the condenser arranged near the discharge grille.
PCT/BR2006/000291 2006-12-22 2006-12-22 Grille for air conditioning unit wrapper assembly WO2008077208A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0622211-0A BRPI0622211A2 (en) 2006-12-22 2006-12-22 air conditioning unit, and, Method for manufacturing an air conditioning unit
PCT/BR2006/000291 WO2008077208A2 (en) 2006-12-22 2006-12-22 Grille for air conditioning unit wrapper assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/BR2006/000291 WO2008077208A2 (en) 2006-12-22 2006-12-22 Grille for air conditioning unit wrapper assembly

Publications (2)

Publication Number Publication Date
WO2008077208A2 true WO2008077208A2 (en) 2008-07-03
WO2008077208A3 WO2008077208A3 (en) 2009-04-02

Family

ID=39562969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2006/000291 WO2008077208A2 (en) 2006-12-22 2006-12-22 Grille for air conditioning unit wrapper assembly

Country Status (2)

Country Link
BR (1) BRPI0622211A2 (en)
WO (1) WO2008077208A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013072592A (en) * 2011-09-28 2013-04-22 Fujitsu General Ltd Integrated air conditioner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193355A (en) * 1989-09-26 1993-03-16 Matsushita Electric Industrial Co., Ltd. Integrated type air conditioner
US5454231A (en) * 1994-03-09 1995-10-03 Carrier Corporation Room air conditioner front inlet grille mounting
US6279339B1 (en) * 2000-08-17 2001-08-28 Carrier Corporation Snap-in plastic grille for an air conditioner housing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193355A (en) * 1989-09-26 1993-03-16 Matsushita Electric Industrial Co., Ltd. Integrated type air conditioner
US5454231A (en) * 1994-03-09 1995-10-03 Carrier Corporation Room air conditioner front inlet grille mounting
US6279339B1 (en) * 2000-08-17 2001-08-28 Carrier Corporation Snap-in plastic grille for an air conditioner housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013072592A (en) * 2011-09-28 2013-04-22 Fujitsu General Ltd Integrated air conditioner

Also Published As

Publication number Publication date
BRPI0622211A2 (en) 2012-01-03
WO2008077208A3 (en) 2009-04-02

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